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MC142 User Manual

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1. ES 108 MIEASUCMENE 4 cccsccsssscensssescsnssosseosssoasedecsoascsosssatsseceocssesssvcsesecevescoodeooscseasooses aaia iaaa kaa GOTO OO KASA 109 Voltage current and frequency s tete WNRARRAERRARAARAGARARAZARERRKZARERA RRNKAI R 109 Measurement of resistance or temperature using resistance temperature sensors 109 Measurement of temperature using thermocouples essent entente tnter 110 Testing of control unit transducers and evaluation units erectis eene neta tate tnanao 110 Option 40 60 cable adapter application 2 see eee eee aaa aaa aaa aaa aaa nnne 111 Option 70 applications rtm OOOO A OOOO OOOO p AAA EA PE 111 Oplioh 80 appliCaUtON ite ee eene e ree eger eere er eet Oi 111 Examples oT tests GARONNA eet ep eee pepe WOW 112 Nis V EP 17 PPS TIU EUN SONORO OOO OE RR 113 ACCESSONIE w ERE E OOOO O AO e NIS EO OWE OE 120 User Manual v41 3 MC 142 Multifunction Calibrator POWERTEK List of tables Tab 1 Functions 8 Tab 2 Reference values 8 Tab 3 Auxiliary connector description 10 Tab 4 Display buttons description 12 Tab 5 Cable adapters description 43 Tab 6 DC VOLTAGE calibration points 53 Tab 7 AC VOLTAGE calibration points 53 Tab 8 DC CURRENT calibration points 54 Tab 9 AC CURRENT calibration points 54 Tab 10 DC POWER calibration points 55 Tab 11 AC POWER calibration points 55 Tab 12 R calibration points 56 Tab 13 C calibration points 57
2. eerie eese eee eee eene ense n sonst a ooo owe tas owa sosta senses etas vo visconti soosse 41 2 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Start of measurement ZR 42 Aiii 42 Simultaneous functions P 44 ID CLUE TACT aaa NNG MED pU 45 Calibr fton mode eret EO EEG Er i ki 49 Error MESS DOS oO teva ee xe OW A EYE R AIR CO 67 Functional description of the Calibrator cccssssssssscccssscssssssssccccccsscsccssssceeccsssssssssssseeees 69 Calibrators maintenance asi Oe AER PH VIRES ERE UEM TS dia 75 I I ETSI LY RR 77 Systemi ONIN OL o ecsieceno eese tv era Feed very a PARS GNik GREG Ni WEGO Gi 86 TEEE 488 bus properties 86 RS232 bus Properties RR 86 ISnnnEInEXir oN e 87 Standard Status Data Structures eessesoesoesoesoesoesossoosoesossossossossossossossossosssesoesossossossossossossossossossossoe 101 Examples of USEC oae vM vto EUM e oA VIVIR MR AGA 104 Calibration of measurement instruments e eeeeeee eese reete e eene enenatis ooo woo wee deo tosta stas eas etse ens 00000 104 llinc T B 104 Id dossier M 106 Counters and oscilloscop6S soy territi uncesssvecsvestecsstecsvenccesstucsvensosssacivensosssvacscstsdussuecsvenseestvasevetsessscess 108 FREFfMOME LCES ie E
3. Irc type Setup Note Load of output terminals is limited similarly to corresponding voltage or current ranges Output signals provided at Hi Lo terminals and AUXILIARY connector are short circuit proof Switching between temperature sensor types Keep pressing TC type or RTD type display button to select desired sensor type If resistance temperature sensors are selected each press of the button selects Pt1 385 Pt1 392 or Ni resistance thermometer The display shows current setting as Pt385 Pt392 Ni If thermocouples are selected each press of the button selects K N R S B J T E types The display shows current setting as TC TYPE x where x is the type of the thermocouple User Manual v41 35 MC 142 Multifunction Calibrator POWERTEK Entry of RO coefficient for resistance temperature sensors For resistance temperature sensors resistance at 0 C labeled RO can be set The range is 20 Q to 2kQ for all types of resistance temperature sensors e Select the resistance temperature sensor mode and keep pressing the center cursor button until symbols appear under the RO coefficient value RO xxxx Q e Set the value using numeric keyboard and confirm by pressing Q or KQ display button or by pressing ENTER 8 6 2888 12 45 0100 0 C AT BABA BLC RB 168 Pt385 Accuracy 8 1150 PTD type setup Note After the calibrator is switched on or before
4. System control The calibrator includes standardized IEEE 488 bus and RS232 serial line System connectors are located at the rear panel For the remote control to work properly bus parameters must be set in the system menu For IEEE 488 bus address is important 0 to 30 setting range For RS232 bus communication speed can be set 150 to 19200 Bd and software handshake XON XOFF can be set The calibrator can be only controlled by one interface at a time It is therefore necessary to select one of the interfaces GPIB RS232 using the system menu IEEE 488 bus properties The instrument performs the following functions based on GPIB bus commands SHI AHI T5 L3 RLI DCI SRI The instrument also recognizes the following general commands DIO3 DIO7 bios bios DCL Device Clear DAV GND TW PAIR WIDA SDC Selected Device Clear NRFD GND TW PAIR W NRFD R NDAC GND TW PAIR W NDAC EOI End or Identify Message Terminator GND TW PAIR W IFC gemar GTL Go To Local SIGNAL GROUND LLO Local Lock Out SPD Serial Poll Disable SPE Serial Poll Enable SHIELD nininini 22 22 212 2 e N gt S o o a a o e RS232 bus properties To transfer the data using RS232 bus 8N1 data format is used i e each data word includes 8 bits no parity and one stop bit The communication speed can be set using the system menu Available values 150 300 600 1200 2400 4800 9600 and 19200 Bd Software handshake communication c
5. If frequency larger or smaller than the calibrator s range is entered the calibrator displays an error message Value is too large small Generation of calibrated voltage The multifunction calibrator provides calibrated DC and AC voltage Output terminals for voltage ranges are labeled Hi and Lo at the front panel Depending on the setting of the calibrator voltage up to 1000 Vef can be present at the terminals DC voltage range is 0 to 1000 V AC voltage range is 100 uV to 1000 V Control in the voltage mode e Press U button on the calibrator and then select AC or DC mode by pressing DC AC button The display shows the following data main data of set voltage relative deviation uncertainty of output voltage frequency when AC voltage is generated total value of output voltage when non zero relative deviation is set X X X e Set the desired value of voltage including polarity when necessary frequency and relative deviation The signal is yet not connected to the output terminals The information section of the display shows the symbol OFF which informs about the disconnection of output terminals Press OUTPUT button Red LED is lit above the OUTPUT terminals to signal the connection of the signal to the output terminals the information section of the display shows the symbol m Calibrated voltage corresponding to set parameters is present at the output te
6. ATTENTION DANGEROUS VOLTAGE When working with voltages over 50 V rules for work with dangerous voltage must be adhered to Never touch the measurement circuit when voltage over 50 V is set and output terminals are connected ATTENTION DANGEROUS VOLTAGE When the calibrator is controlled remotely it is not possible to disconnect the output voltage using the buttons located at the front panel The calibrator must be first switched to local control mode by pressing the LOCAL button and then the output terminals can be disconnected or the mains switch must be switched off User Manual v41 21 MC 142 Multifunction Calibrator POWERTEK Generation of calibrated current The multifunction calibrator provides calibrated DC and AC current Output terminals for voltage ranges are labeled I and I at the front panel The terminals can carry high current and are the only terminals to which the calibrated object can be connected Depending on the setting of the calibrator current up to 20 Agr can be driven by the terminals DC current range is 0 to 30 A AC current range is luA to 30A When 25 50 turn coil option 140 50 is used AC current range is 504A to 1000 A Control in the current mode e Press T button on the calibrator and then select AC or DC mode by pressing DC AC button The display shows the following data main data of set current relative deviation uncertainty of output current f
7. 5 4 3 2 1 o ESE Event Status Enable Register lt Read bySerialPoll Service Request STB Status Byte Register Generation 4 lt Read using STB abe ICE M v Read using SRE 4 Wfite using SRE 7 6 5 4 3 2 1 0 SRE Service Request Enable Register Status Register Overview Status data structure of MC142 Calibrator contains following registers STB Status Byte Register SRE Service Request Enable Register ESR Event Status Register ESE Event Status Enable Register Output Queue STB Status Byte Register The summary messages from the Event Status Register and Output Queue are used to set or clear the appropriate bits B4 and B5 of the Status Byte Register These bits do not latch and their states 0 or 1 are solely dependent on the summary messages 0 or 1 For example if the Standard Event Register is read its register will clear As a result its summary message will reset to 0 which in turn will clear the ESB bit in the Status Byte Register Bit configuration of Status Byte Register User Manual v41 101 MC 142 Multifunction Calibrator POWERTEK RQS Request Service bit 6 The RQS bit is set to 1 whenever bits ESB or MAV change from 0 to 1 and are enabled 1 in the SRE When RQS is 1 the MC142 asserts the SRQ control line on the IEEE 488 interface You can do a serial poll to read this bit to
8. 81 2 digit multimeter type HP3458A or Fluke 8508A or other type with accuracy 0 001 on DC voltage e Resistance shunt 10 mQ 100 mQ Burster 1280 or other type with accuracy 0 01 e Resistance standard 100 Q 1000 Q Burster 1228 1229 or other type with accuracy 0 005 e RLC Agilent HP 4263A Agilent HP4278A Agilent E4981A or other with accuracy 0 1 e Counter Agilent HP 53181A Agilent HP 53130 or other with accuracy 0 001 96 Powermeter 0 02 0 05 Zimmer LG95 or better HP8903A Distortion analyzer and scope with bandwidth min 20 MHz are recommended for THD measuring of AC signals Calibration procedure 1 Connect the calibrator and the multimeter to the mains and let them switched on for at least three hours in a laboratory at 23 1 C 2 Press SETUP display button to call up the setup menu and then CALIB display button to call up the calibration menu 3 Enter the calibration code and press ENTER default calibration code is 00000 4 DC voltage ranges calibration a Connect the voltage input terminals of the multimeter to the Hi Lo output terminals of the calibrator b Select VOLTAGE DC from the calibration menu and confirm by pressing SELECT button Switch MC 142 output terminals ON c Follow the instructions provided on the calibrator s display and the DCU table to adjust the calibrator s output in the calibration points d To adjust the calibrator s output in the calibration points press SELECT but
9. User Manual v41 87 MC 142 Multifunction Calibrator POWERTEK Example OUTP 1 cr activates the output OUTP lt cr gt the calibrator returns ON or OFF OUTP ISEL CPD HIGH HI50 This command activates or deactivates the 1000A current range using a 50 turn coil HIGH deactivates the 50 turn coil HI50 activates the 50 turn coil up to 1000A range If query is sent MC142 returns HIGH if the 50 turn coil is deactivated or HI50 if it is activated Example OUTP ISEL HI50 lt cr gt activates the 50 turn coil OUTP ISEL lt cr gt the calibrator returns HIGH or HI50 SOURce subsystem This subsystem allows to control the individual functions of MC142 calibrator Keyword SOURce FUNCtion SHAPe VOLTage LEVE IMMediate AMPLitude CURRent LEVEI IMMediate AMPLitude RESistance LEVE IMMediate AMPLitude CAPacitance LEVE IMMediate AMPLitude POWEr LEVEI IMMediate AMPLitude PHASe UNITS 2 ADJust VOLTage LEVEI IMMediate AMPLitude CURRent LEVEI IMMediate AMPLitude 88 Parameters lt CPD gt DC SINusoid PULPositive PULSymmetrical PULNegative RMPA RMPB TRlangle LIMSinusoid PW MPositive PWMSymmetrical PVMNegative SQUare lt DNPD gt lt DNPD gt lt DNPD gt lt DNPD gt
10. display button or by pressing ENTER Setting the signal shape Signal shape can only be set in PWM mode Keep pressing SHAPE display button to select desired signal shape NEG negative SYM symmetrical POS positive e Output signal of desired shape is connected to the output connector Simulation of temperature sensors The multifunction calibrator can simulate resistance temperature sensors and thermocouples When resistance temperature sensors are simulated a simulated resistance corresponding to set temperature sensor type and temperature scale is connected to Hi Lo terminals When thermocouples are simulated a simulated voltage corresponding to set temperature sensor type and temperature of cold end of thermocouple is connected to Hi Lo terminals Simulated values of resistance temperature sensors are also available at the AUXILIARY connector Four wire connection of resistance temperature sensors is provided by current terminals PTLI PTHI and voltage terminals PTLU PTHU Option 70 cable adapter has to be applied Temperature setting range 250 to 1820 C depending on simulated sensor type Sensor types resistance temperature sensor Pt 1 385 Pt 1 392 Ni thermocouple K N R S B J T E Temperature scale ITS 90 PTS 68 for resistance temperature sensors and thermocouples Switching between resistance temperature sensors and thermocouples e Press T button on the calibrator The main value on the display
11. CPD ON OFF 0 1 This command connects or disconnects the output signals to AUXILIARY connector e ON or output signals are connected to AUXILIARY connector front panel terminals are disconnected e OFF or 0 output signals are connected to front panel terminals AUXILIARY connector is disconnected If query is sent MC142 returns ON when the signals are connected to AUXILIARY connector or OFF when the signals are connected front panel terminals Example AUX 1 lt cr gt output signals are connected to AUXILIARY connector AUX lt cr gt the calibrator returns ON or OFF SOUR AUX ADAP This command can be used to find out what type of cable adapter is connected to AUXILIARY connector If query is sent MC142 returns the type of cable adapter connected to AUXILIARY connector NONE CA14001 CA14041 CA14040 CA14060 CA5 CA6 CA7 Example AUX ADAP lt cr gt the calibrator returns NONE when no cable adapter is connected or the type of cable adapter connected to AUXILIARY connector SOUR FREQ CW lt DNPD gt This command sets the frequency being generated Examples AC voltage frequency FUNC SIN VOLT lt DNPD gt FREQ lt DNPD gt lt cr gt AC current frequency FUNC SIN CURR lt DNPD gt FREQ lt DNPD gt lt cr gt Digital frequency FUNC SQU FREQ lt DNPD gt lt cr gt lt DNPD gt Represents the frequency in Hz Technical Data chapter lists the a
12. Decrease load resistance High temperature Too high internal Output stages are overloaded Do not use ranges 200V 1000V or temperature 20 A for at least 10 minutes Check if the ventilation holes are free Overload RC RC simulator overloaded Test current is too high Use lower range of tested Ohmmeter FBK error Internal error Turn off the calibrator and turn on it again OUTPUT must be Cable adapter tried to be Switch off output terminals with button OUTPUT change the in OFF state exchanged while output adapter and switch output terminals on terminals was ON Interface error GPIB communication error Wrong data format on GPIB Bad command Bad command of GPIB Not known command on GPIB Bad GPIB communication error Listener not connected to the GPIB Check correct connection of communication GPIB cable Over range Overcrossing the range via Value out of range was set via GPIB Set correct value GPIB Bad calib code Bad calibration code Wrong calibration code was entered calibration cannot start Enter correct calibration code Time warm up Attempt to start calibration Attempt to start calibration before 60 minutes warm up period before warm up Let the calibrator turned on for at least 60 minutes Cable adapter must Adapter isn t allowed for Use another cable adapter or perform autocalibration procedure be off autocalibration without cable adapter Use cable adapter Attempt to start calib
13. Frequency change e First select the AC voltage or AC current mode by pressing U I AC buttons or selecting the P E mode using the display Frequency value f xxx xx Hz appears in the minor data section of the display f symbol is displayed above one of the display buttons e After f display button is pressed 3 symbols appear below the frequency value Numeric keyboard can be used to enter the desired value Press Hz or kHz to confirm the value The value can be set using the buttons or the potentiometer DUTP IT 16 16 2666 12 21 OFF 13 00000 U Local i anaU 10 00000 U AZ 3 ana 1888 88 Hz 2 883 ape ine Accuracy 8 8337 INPUT oa ACAL Hz kHz Exit If too large or too small value is entered the calibrator displays the maximum minimum value which is allowed for the selected function Frequency F Set value of frequency is the main data on the display and the main parameter of the signal Main data can be set by direct entry using the numeric keyboard potentiometer or by changing the digit at the current cursor position The setting procedure is described in the Setting the value of output signal User Manual v41 19 MC 142 Multifunction Calibrator POWERTEK NUT PIT 18 18 2888 12 23 OFF 1 000000 kHz PWM SEZ Shape PWM POS Accuracy A 86582 INPUT U ACAL x ta 18 Shape Setup
14. NY 11741 USA Tel 1 631 615 6279 Fax 1 973 273 5893 Email info powertekus com www powertekus com User Manual v41 121
15. Tab 14 F calibration points 57 Tab 15 Multimeter calibration points 57 Tab 16 Error messages 67 Tab 17 RS232 connector description 84 Tab 18 Recommended way of signal terminal grounding 105 Tab 19 Application of cable adapters 107 Tab 20 Overview of cable adapters 109 Table I Verification test VDC 20V 80 Table II Verification test VDC 80 Table II Verification test VAC 20V 80 Table IV Verification test VAC 81 TableV Verification test ADC 200mA 81 Table VI Verification test ADC 81 Table VII Verification test AAC 82 Table VIII Verification test AACDC High current 82 Table IX Verification test ACDC Power 82 Table X Verification test R 82 Table XI Verification test C 82 Table XII Verification test F 83 Table XIII Verification test Multimeter 83 4 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Basic Information MC 142 Multifunction Calibrator is a multifunction calibrator to be used primarily as a standard for calibration laboratories It can be used for calibration of any measuring instrument which measures voltage current resistance capacitance and frequency It generates fixed non harmonic signals to allow calibration of measuring instruments using signals with non zero harmonic distortion Frequency amplitude and duty cycle of output signal can be adjusted MC 142 Multifunction Calibrator is also suitable for basic calibration of oscilloscopes The calibrator includes a function which simulates resistance and thermo
16. deo we0w 19 Generation of calibrated voltage 4 eerie eere ee eese eese eese tenet s etae tna etas owa e tas e tas owa e tas e tne ta sena 20 Generation of calibrated current eerie ee eee owooa wawa wood WOW tata s tns tn senes eas en senses esta sen euaen 22 Generation of non harmonic shapes eeeeee eene e eerte eene enean tasto senses wow senses essen stas O dowo 00000 23 Simulation of resistance and capacitance eeeeeee eee eese eee ee eene owa o aaa sonans stata stas owa o dowo 00000 24 Generation of electric power and energy eeeeeeeeeeee eene eene owo w stas tasas tns ta stats stas tastes essen sea 25 Generation OF frequency PH e die 31 Simulation of temperature sensors eese sees eese ener etes etnia stats stas tn senses stas tn sesenta senses east 0000 34 NETTE TA EE 38 hnug 38 FUTCHHON SLE CHO POR 39 Setting the measurement range ccccccccccscccsscssecesscssscssscssscssscesscssscsecssscssssssssssssssscsssssssssssssessesees 39 Units of measurement ccccscsssssescsscsssssscssscsssssssnsssscssssssscessscssssssssnscesscssessesescessesssssssessesssssesescess 39 Use of calculation formula eee noo wawa ooo woo 0000000 tussis stas ta senses etas tasses eta sensa sensns tnsua 40 Setting function parameters
17. gt 1888 88 Hz Shape Sine Accuracy 8 8352 ACAL Entry of the value using cursor buttons e press lt gt A or v button The display now includes cursor marks which point to the active digit e a and v buttons can be used to change the active digit lt gt buttons can be used to change the position of the cursor marks to get to the default screen press EXIT button or keep pressing the center cursor button until there is no under any value All values can be set using the buttons or the potentiometer Entry of the value using the potentiometer press the potentiometer knob The display now includes cursor marks which point to the active digit e tum the knob to change the active digit e press the potentiometer knob to change to the mode which allows to change the value of the active digit and symbols are displayed above the active digit Active digit can be changed by turning the knob tum the knob to change back to the mode which allows to change the position of the active digit e to get to the default screen keep pressing the center cursor button until there is no ________ under any value or press EXIT button All values can be set using the buttons or the potentiometer Reverse polarity In DC voltage and DC current modes the polarity of the output value can be reversed by pressing display button symbol appears in front of the main data value 16 User Manual v41 POWERT
18. is returned as 1 003000e 002 SOUR POWE CURR LEVE IMM AMPL lt DNPD gt This command sets the amplitude of the current for power generation At the same time the power generation mode is set lt DNPD gt Represents the current expressed in Amperes used to generate the power Technical Data chapter lists the acceptable ranges If query is sent MC142 returns the set value of the current using standard exponential format Example 1 3A is returned as 1 300000e 000 SOUR EART VOLT CPD ON OFF 0 1 This command connects or disconnects the voltage Lo terminal to from GND terminal e ONor l grounds the voltage output OFF or 0 ungrounds the voltage output If query is sent MC142 returns ON when the output is grounded or OFF when ungrounded Example EART VOLT 1 lt cr gt grounds the voltage output terminals EART VOLT lt cr gt the calibrator returns ON or OFF User Manual v41 91 MC 142 Multifunction Calibrator POWERTEK SOUR EART CURR lt CPD gt ON OFF 0 1 This command connects or disconnects the current Lo terminal to from GND terminal e ON or 1 grounds the current output e OFF or 0 ungrounds the current output If query is sent MC142 returns ON if the current terminals are gronded or OFF if ungrounded Example EART CURR 1 cr grounds the current output terminals EART CURR lt cr gt the calibrator returns ON or OFF SOUR AUX
19. lt DNPD gt lt CPD gt DEG COS lt DNPD gt lt DNPD gt lt DNPD gt User Manual v41 POWERTEK MC 142 Multifunction Calibrator EARTh VOLTage CURRent AUXiliary ADAPter FREQuency CW DUTY VOLT ATTE TEMPerature UNITS SCALe THERmocouple LEVEI IMMediate AMPLitude RJUNction TYPE 2 PRT LEVEI IMMediate AMPLitude TYPE 2 NRESistance lt CPD gt ON OFF 0 1 lt CPD gt ON OFF 0 1 lt CPD gt ON OFF 0 1 lt DNPD gt lt DNPD gt lt DNPD gt lt DNPD gt lt CPD gt C CEL K lt CPD gt 4 TS68 TS90 lt DNPD gt lt DNPD gt lt CPD gt B E J K N R S T lt DNPD gt lt CPD gt PT385 PT392 NI lt DNPD gt SOUR FUNC SHAP CPD DC SIN PULP PULS PULN RMPA RMPB TRI LIMS PWMP PWMS PWMN SQU This command sets the shape of the output signal At the same time the respective function must be set E g for VOLT or CURR function FUNC DC FUNC SIN or other signal shape must be set Some functions RES CAP do not require any other settings e DC sets a DC output signal for voltage current or power modes SINusoid sets AC output signal for voltage current or power modes e PULPositive sets AC squarewave signal for voltage or current modes The amplitude and duty cycle can be set
20. performs all commands written on one line of the program after it receives cr lt If gt or lt crlf gt code Without this code the program line is ignored Description of abbreviations lt DNPD gt Decimal Numeric Program Data this format is used to express decimal number with or without the exponent lt CPD gt Character Program Data Usually it represents a group of alternative character parameters E g ON OFF 0 1j A flag indicating a request for the value of the parameter specified by the command No other parameter than the question mark can be used 0 A flag indicating a request for the parameter specified by the command This command permits a value to be set as well as requested lt cr gt carriage return ASCII code 13 This code executes the program line xt line feed ASCII code 10 This code executes the program line OUTPut subsystem This subsystem allows to control the output terminals of MC142 calibrator to activate the four wire output or to switch the calibrator to x50 current coil option 140 50 Keyword Parameters OUTPut STATe lt CPD gt ON OFF 0 1 ISELection lt CPD gt HIGHi HI50turn OUTP STAT CPD ON OFF 0 1 This command activates or deactivates the output of MC142 calibrator e ONorl activates the output e OFF or 0 deactivates the output If query is sent MC142 returns ON if the output is active or OFF if it is inactive
21. potentiometer or cursor buttons Confirm the value by pressing display button or by pressing ENTER Setting the amplitude Signal amplitude in Volts can only be set in PWM mode e Select the frequency mode and keep pressing the center cursor button until under the amplitude value U x xxx V symbols appear e Set the value using numeric keyboard and confirm by pressing V display button or by pressing ENTER 32 User Manual v41 POWERTEK MC 142 Multifunction Calibrator 18 18 2888 12 42 Hmm 1 000000 kHz A BB8 808887 PUM 502 Accuracy B8 8858Z U 1 1 S Exit Setting the attenuation Signal attenuation in dB can only be set in HF mode Attenuation can be set in steps of 0 10 20 30 dB e Select the frequency mode and keep pressing the center cursor button until under the attenuation value a x xxx dB symbols appear e Set the value using numeric keyboard and confirm by pressing dB display button or by pressing ENTER If other than permitted value is set the closest permitted value is used User Manual v41 33 MC 142 Multifunction Calibrator POWERTEK Setting the duty cycle Duty cycle can only be set in PWM mode e Select the frequency mode and keep pressing the center cursor button until under the duty cycle value PWM xx symbols appear e Set the value using numeric keyboard cursor buttons or potentiometer and confirm by pressing
22. 18 2888 12 33 1 150000 kl Phase 8 68 f 38 888 Hz U 238 8888 U i T B5 88888 A Ir Ir 17 Exit User Manual v41 POWERTEK MC 142 Multifunction Calibrator 4 Setting the power factor AC power only e If W or Var is indicated the main power value can be changed by changing the power factor Change of power factor does not change the output apparent power e Select P E mode and then keep pressing the center cursor button until appear under the power factor symbols PF x xxx LA LE or Phase xxx x The value can be set using numeric keyboard and confirmed by pressing LA LE button or by pressing ENTER e Main power value is recalculated using new set power factor and existing setting of current and voltage The calculation is only made if active or reactive power is displayed 18 18 2888 12 33 1 150000 k 38 888 Hz 85 888886 A lud lud 17k Exit In the power generation mode relative deviation cannot be set If the power factor is set to define the phase relation of voltage and current confirmation of entered value by pressing LA button means positive phase LE means negative phase Setting the energy Keep pressing the P E button to switch to the energy generation mode Auxiliary data display area shows the time in seconds and the energy delivered to output terminals after pressing the OUTPUT button given the existing setting of voltage current frequency and p
23. Hi Lo terminals and the set current through I terminals Both signals have defined phase shift according to the set power factor if AC mode is set channel Phase shift Current generator amplifier Digital phase comparator Hi U channel generator 20V amplifier 200v Lo a amplifier Feedback amplifier Output voltage is obtained from 200 V AC voltage range Output current is obtained from 2 or 20 A current range The output current generator is independent of the output voltage generator and synchronized by the microprocessor s crystal oscillator There is a phase shift between the signals of the output current generator and output voltage generator according to the set power factor The phase of output current and voltage is compared by a phase comparator and compared to a reference value representing the set power factor the output drives a voltage controlled phase shift element which controls the phase of output current 74 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Calibrator s maintenance The multifunction calibrator is electronic instrument with microprocessor control All blocks which are heavily loaded during the operation are cooled by a fan Rules for correct operation Especially the following rules should be adhered to guarantee correct operation of the calibrator The calibrator can only be switched on and off by pressing the mains switch located at the rear panel Do not
24. Resistance 10 V 20 mA Measurement of resistance bridges Calibration of a single phase electrical power current loop transducer DUT power transducer NAM OUTPUT 30 00000 A Opt 40 adapter Function setup Calibrator P function voltage current power factor frequency Multimeter DCI Adapter Opt 40 112 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Specification Uncertainties include long term stability temperature coefficient linearity load and line regulation and the traceability of factory and National calibration standards Specified accuracy is valid after one hour warm up in temperature range 23 2 C Specified accuracy is one year accuracy Calibrator Voltage summary range DCV 0 uV 1000 V summary range ACV 0 1 mV 1000 V internal ranges voltage resolution frequency resolution frequency range 20 mV 200 mV 2 V 20 V 240 V 1000 V 61 2 digit 6 digit minimum step 0 001Hz 20 Hz to 100 kHz bellow 20 V 20 Hz to 10 kHz bellow 200 V 20 Hz to 1000 Hz bellow 1000 V 0 uV 20 00000 mV 20 00000 mV 200 0000 mV 0 005 6 0 0015 8 0 0012 10 0 0010 50 0 200000 mV 2 000000 V 2 00000 V 20 00000 V 20 0000 V 240 0000 V 0 0015 500 240 000 V 1000 000 V 0 005 20 000 value of the range for uncertainty calculation is 200 V ACV uncertain value uV Max current mA value range 20 Hz 10 kHz 20 Hz 10
25. be simulated Example to activate the simulation of platinum resistance temperature sensor at 350 C approximated using PT385 table Europe TEMP PRT 350 TEMP PRT TYPE PT385 cr If query is sent MC142 returns the set type of approximation table PT385 PT392 NI SOUR TEMP PRT NRESistance lt DNPD gt This command sets the nominal resistance of the resistance temperature sensor at 0 C 10Q to 2kQ can be set 94 User Manual v41 POWERTEK MC 142 Multifunction Calibrator lt DNPD gt Represents the nominal resistance in Ohms If query is sent MC142 returns the set value of nominal resistance using standard exponential format Example 20 5Q is returned as 2 050000e 001 MEASure subsystem This subsystem allows to control the internal multimeter of MC142 calibrator It sets the multimeter s functions and reads measured values Keyword Parameters MEASure CONFigure VOLTage CURRent MVOLTage RESistance FREQuency TEMPerature RTD TYPE lt CPD gt PT385 PT392 NRESistance lt DNPD gt THERmocouple TYPE 2 lt CPD gt B E J K N R S T RJUNction lt DNPD gt MEAS This command returns the measured value Example 20 5 Q is returned as 2 050000e 001 MEAS CONF MC142 returns the set measurement mode VOLT CURR MVOLT RES FREQ TEMPerature RTD TEMPerature THERmocouple OFF MEAS CONF VOLT This command selects the
26. function VOLT range 0 12V of internal multimeter and switches it on Example to set the multimeter to DC voltage 10V measurement mode MEAS CONF VOLT cr User Manual v41 95 MC 142 Multifunction Calibrator POWERTEK MEAS CONF CURR This command selects the function CURR range 0 25mA of internal multimeter and switches it on Example to set the multimeter to DC current 20mA measurement mode MEAS CONF CURR lt cr gt MEAS CONF MVOLT This command selects the function MVOLT range 0 2000mV of internal multimeter and switches it on Example to set the multimeter to DC voltage 2000mV measurement mode MEAS CONF MVOLT lt cr gt MEAS CONF RES This command selects the function RES range 0 2000 of internal multimeter and switches it on Example to set the multimeter to resistance measurement mode MEAS CONF RES lt cr gt MEAS CONF FREQ This command selects the function FREQ of internal multimeter and switches it on Example to set the multimeter to frequency measurement mode MEAS CONF FREQ lt cr gt MEAS CONF TEMP RTD TYPE lt CPD gt PT385 PT392 This command selects the function RTD of internal multimeter sets the type of resistance temperature sensor and switches the multimeter on Example to set the multimeter to resistance temperature sensor type PT385 measurement mode MEAS CONF TEMP RTD TYPE PT385 cr If query is sent MC142 returns the s
27. functions The multifunction calibrator allows simultaneous generation of calibrated signal along with measurement of another signal using the built in multimeter To use both parts of the calibrator simultaneously cable adapters supplied by the manufacturer are necessary When using the calibrator the following states are possible Cable adapter applied No cable adapter is used The calibrator is used with 140 01 cable adapter The calibrator is used with Option 40 Canon 2 banana cable end The calibrator is used with Option 60 Canon 4 banana cable end The calibrator is used with Option 70 Canon 4 terminals The calibrator is used with Option 80 Canon 2 terminals The calibrator is used with Option 90 Pt100 external temperature sensor Limitation of output signals Calibrator output signals are not limited in any way and can be fully used Calibrator output signals are available at the terminals located at the front panel Calibrator output signals are not limited in any way and can be fully used Calibrator output signals are available only at the terminals located at the cable adapter Calibrator output signals are not limited in any way and can be fully used Calibrator output signals are available on the terminals located at the front panel Calibrator output signals are not limited in any way and can be fully used Calibrator output signals are only available at th
28. have to be in temperature stabilize condition at minimum 8 hours before performance verification test is started Basic steps of the performance verification test User Manual v41 77 MC 142 Multifunction Calibrator POWERTEK Verification procedure consists of following steps 20 V DC voltage test with linearity check DC voltage internal ranges 20 mV 200 mV 2 V 240 V 1000 V test 20 V AC voltage test with linearity check AC voltage internal ranges 20 mV 200 mV 2 V 20V 240 V 1000 V test 200 mA DC current test with linearity check DC current internal ranges 200 uA 2 mA 20 mA test AC current internal ranges 200 uA 2 mA 20 mA 200 mA test AC DC high current ranges 2 A 30 A test AC DC power 4800VA AC power with PF 0 0 5 0 5 test Resistance test in points 10 100 1k 10k 100k 1M 10M 50M 500M Ohm on DC Capacitance test in points ln 10n 100n lu 10u 50u F on frequency 1000 Hz Frequency nominal value kHz test Multimeter internal ranges 20 mVDC 200 mVDC 2 VDC 10VDC 25mADC 200 Ohm 2 kOhm frequency kHz test Distortion checking of AC voltage range 20 V Procedure Following part describes procedure of performance verification test Recommended measuring points are the same as the points in table of limits see tables bellow 1 2 3 78 Connect the calibrator to the mains and let them switched on for at least one hour in a laboratory at 23 1 C Perform ACAL procedure see chapter
29. have been entered the program has returned to the calibration menu e the calibration has been started but no calibration data have been entered the program has returned to the calibration menu after EXIT display button has been pressed 52 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Press EXIT display button to terminate the calibration After the button is pressed the calibration date is saved internally and the calibrator returns to the state it was in before the calibration has been started Calibration points Each function of the calibrator has assigned fixed calibration points which have to be set during the calibration For VOLTAGE DC VOLTAGE AC CURRENT DC CURRENT AC POWER AC POWER DC F functions the signal value is set using the keyboard For R C functions and partially also during the calibration of the multimeter calibration data of the range resistances must be entered T function does not require any calibration as the output voltage or resistance is based on arithmetic interpolation using standard tables of temperature sensor values The calibrator needs no calibration of the following parameters e frequency e phase relationship power factor of output voltage and frequency in AC power energy generation mode DC and AC power except DC and AC current in this mode User Manual v41 53 MC 142 Multifunction Calibrator POWERTEK VOLTAGE DC function nominal value V set l
30. is not necessary to calibrate all ranges calibration of only selected ranges is possible by skipping the ranges which do not need to be calibrated Moreover the display shows the range which is being calibrated RANGE and the value to be set at the external standard multimeter VALUE Setting the new calibration data Use A v lt gt cursor buttons to set such main data on the display when the output signal measured by external standard multimeter reaches the required calibration point When the standard output value is reached press WRITE to write new calibration value to the calibration memory If you press SKIP button the calibrator ignores the new value and old value is retained After you press WRITE or SKIP the calibrator moves on to the next calibration point The procedure is repeated for all calibration points of the selected function If you press EXIT button before completing the calibration the calibrator returns to the calibration menu Termination of calibration The calibration can be terminated in the following cases complete calibration has been performed new calibration data have been entered the program has returned to the calibration menu calibration of selected function has been performed new calibration data have been entered the program has returned to the calibration menu calibration of selected range s of selected function has been performed new calibration data
31. is set temperature The calibrator simulates a resistance temperature sensor Press T button on the calibrator once again The calibrator simulates a thermocouple Setting the temperature e Press T button on the calibrator The main value on the display is set temperature e The display shows the following data main data of temperature in C or K 34 User Manual v41 POWERTEK MC 142 Multifunction Calibrator sensor type thermocouples K N R S B J T E resistance temperature sensors Pt 1 385 Pt 1 392 Ni resistance at 0 C labeled RO resistance temperature sensors only cold junction temperature of thermocouple sensors labeled RJ set value of relate deviation in labeled AT xxxx x C K the information section shows temperature scale type uncertainty of simulated temperature value of selected temperature sensor type Set the main value of temperature using numeric keyboard cursor buttons or potentiometer Output terminals are disconnected the information section of the display shows forr the symbol which shows that output terminals are disconnected Connect the object to be calibrated to Hi Lo terminals Press OUTPUT button Red LED is lit above the OUTPUT terminal to indicate that the output signal is connected to output terminals The display shows the symbol of connected output terminals 8 6 2888 12 44 0100 0 C AT BHAU BOC RJ 6823 8 C TC tupe T 3 3672 mU mM
32. kHz 10 kHz 50 kHz 0 10000 mV 20 00000 mV 20 0000 mV 200 0000 mV 0 200000 mV 2 000000 V 2 00000 V 20 00000 V 20 0000 V 240 0000 V 240 000 V 1000 000 V valid for f lt 1000 Hz 0 2 30 0 5 0 20 0 10 20 uV 0 1 80 4 0 15 0 05 20 uV 0 018 100 30 0 05 0 01 0 018 1 000 30 0 05 0 03 0 018 10 000 30 0 03 200 000 2 value of the range for uncertainty calculation is 200 V in the range 200 to 240 V is frequency limited to 1000 Hz Output resistance lt 0 1 Ohm Minimum load resistance is 40 Ohm 50 kHz 100 kHz 50 kHz 100 kHz 0 10000 mV 20 00000 mV 20 0000 mV 200 0000 mV 0 200000 mV 2 000000 V 2 00000 V 20 00000 V 20 0000 V 240 0000 V 240 000 V 1000 000 V 1 0 0 10 20 uV 0 5 0 3 0 05 20 uV 23 0 2 0 05 5 0 2 0 05 gt Auxiliary parameters 0 05 300 uV lt 10mQ 800 pF lt 10mQ 800 pF output impedance maximal capacitance load TT parameter includes non linear distortion and non harmonic noise dye valid for frequencies to 10 kHz User Manual v41 Max current mA 10 kHz 50 kHz 0 5 9 4 10 10 113 MC 142 Multifunction Calibrator POWERTEK Function Shape voltage range 1 mV to 200 V wave form square positive negative symmetrical ramp A ramp B triangle truncated sin with THD 13 45 peak value uncertainty 0 3 50 uV displayed values peak effectiv
33. out FIFO Queue The Output Queue is cleared upon power on User Manual v41 103 MC 142 Multifunction Calibrator POWERTEK Examples of use Calibration of measurement instruments The calibrator can be used for direct calibration of various instruments which measure electrical values Opt 140 01 cable adapter is recommended The cable adapter includes a temperature sensor which allows the measurement of external temperature Measured value can be displayed by pressing INPUT button Multimeters The calibrator can be used for calibration of digital and analogue multimeters DCV ACV DCI ACI resistance capacitance temperature frequency and duty cycle Voltage ranges Thanks to low output impedance and high output current the calibrator can be used for calibration of analogue voltmeters and milivoltmeters having low input impedance Voltage output is connected to Hi Lo terminals The calibrator does not allow the four wire connection of the instrument to be calibrated It is not recommended to connect non standard load to the voltage output The calibrator is designed to be used for calibration of voltmeters Output terminals should be loaded with high and real impedance Although the output is fitted with fast electronic and microprocessor protection high capacitance or inductance loads can lead to oscillations of output amplifiers and result in damage The instrument to be calibrated can be connected either directly to the
34. output Capacitance calibration is performed by setting the zero and slope of the scale in all ranges Slope of each range is calibrated twice In practice 9 internal capacitance ranges 1 nF to 100 uF must be measured and the measured value entered into the calibrator then zero point of the scale is adjusted for each range User Manual v41 49 MC 142 Multifunction Calibrator POWERTEK Frequency function calibration is performed by calibration of DC voltage range and zero point check DC voltage levels are checked between which the calibrator switches when generating the signal The accuracy of PWM of the square wave output signal depends on the frequency accuracy and cannot be calibrated it can only be checked The respective check is not included in the calibration procedure Multimeter is calibrated on voltage ranges 2 V and 10 VDC voltage ranges on current range 20 mADC and on resistance range 2000 Q For calibration cable adapters Option 40 10V range voltage current Option 80 20mV 200mV 2V range voltage and Option 60 resistance must be used Access to the calibration procedure Calibration code is required to access the calibration procedure e Press SETUP to open the setup menu e Press CALIB display button Concerning cable adapters access to the calibration mode is permitted without connected any of cable adapters or with connected cable adapter Option 40 Option 60 Option 70 and Option 80 If cable adapter Opt
35. reactive power dP V dU dl dPF 4 0 037 for apparent power dP V dU dP 0 03 where dP is uncertainty of power dU is uncertainty of set voltage dl is uncertainty of set current dPF is uncertainty of power factor cosq For calculation of dPF is valid following formula dPF 1 cos p dq cos q 100 96 where issetphase shift between voltage and current outputs de is uncertainty of set phase shift in table above dPF is uncertainty of of sing For dPF is valid following formula dPF 1 sin ptdo sin q 100 96 116 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Example Set parameters U 100 V I 10 A cos 0 5 f 50 Hz displayed value of active power in W Output voltage uncertainty dU 0 025 value 0 010 range 0 045 Output current uncertainty dI 0 05 value 0 01 range 0 06 Uncertainty due the set phase shift PF 0 5 corresponds phase shift 60 dPF 1 cos 60 0 15 cos 60 100 1 0 4977 0 5 100 0 45 Output power uncertainty dP V 0 045 0 06 0 45 0 037 0 46 POWER FACTOR PF range 1 0 to 1 0 PF uncertainty can be calculated for any set value of output voltage current and PF from following formula dPF 1 cos tdgycos p 100 96 where issetphase shift between voltage and current de is uncertainty of set phase shift form the above table AC ENERGY uncertainty It
36. set the temperature of cold end of thermocouple to 25 C MEAS CONF TEMP THER RJUN 25 lt cr gt If query is sent MC142 returns the set temperature using standard exponential format Example 20 5 C is returned as 2 050000e 001 MEAS CONF OFF This command switches the multimeter off TEST RUN lt DNPD gt This command starts selected procedure Number 1 to 10 can be set lt DNPD gt Represents number of procedure Example to run test procedure 3 TEST RUN 3 lt cr gt TEST RESU MC142 returns the result of selected procedure 4 PASS FAIL RUN String RUN is returned if selected procedure isn t finished V D instrument identification IDN This command returns the identification of the manufacturer model serial number and firmware revision User Manual v41 97 MC 142 Multifunction Calibrator POWERTEK The reply is formatted as follows POWERTEK MC 142 412341 4 6 Operation complete OPC lt cr gt This command sets the OPC bit in the ESR Event Status Register when all pending operations are complete Operation complete OPC lt cr gt This command returns 1 to the output queue after all pending operations are complete Operation complete OPC lt cr gt This command returns 1 to the output queue after all pending operations are complete Wait to Continue command WAI lt cr gt Prevents the instrument from executing any further commands or que
37. setting the checked value and measuring this value with the standard instrument as well as setting the nominal value of the calibrator s measurement range on the external multimeter by adjusting the calibrator s output If the entry of measured value to the calibrator is required VALUE METER is displayed at the respective calibration point The value on the calibrator s display has the same format as the nominal value of the respective calibration point on the display If on the other hand the user is requested to adjust the calibrator s output to set the nominal value of the calibrator s measurement range on the external multimeter VALUE is displayed at the respective calibration point The value on the calibrator s display has general format a b c d e User Manual v41 The calibrator have to be calibrated with attached adapter Option 70 in four wire connection Connect adapter to the AUXILIARY connector Select RESISTANCE from the calibration menu Select four wire resistance measurement function on the external multimeter Adjust the zero value of the external multimeter including the cables if necessary Connect all four wires of adapter Option 70 to the input terminals of external multimeter Use four wire technique Connect correct terminals and wires Measure the resistance in the recommended calibration points using the multimeter and write the values into the calibrator Use numeric keyboard potentiom
38. specification See chapter Calibration mode where recalibration procedure is described 80 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Tables of limits 20 V DC Basic range with linearity test Function Range Value V Frequency Hz Deviation allowed pV V DC 20 0 V 2 0 DC 70 V DC 20 0 V 4 0 DC 90 V DC 20 0 V 6 0 DC 110 V DC 20 0 V 8 0 DC 130 V DC 20 0 V 10 0 DC 150 V DC 20 0 V 12440 DC 170 V DC 20 0 V 14 0 DC 190 V DC 20 0 V 16 0 DC 210 V DC 20 0 V 18 0 DC 230 V DC 20 0 V 19 0 DC 240 V DC 20 0 V 2 0 DC 70 V DC 20 0 V 4 0 DC 90 V DC 20 0 V 6 0 DC 110 V DC 20 0 V 8 0 DC 130 V DC 20 20 IV 10 0 DC 150 V DC 20 0 V 12 0 DC 170 V DC 20 0 V 14 0 DC 190 V DC 20 0 V 16 0 DC 210 V DC 20 0 V 18 0 DC 230 V DC 20 0 V 19 0 DC 240 Table I DC voltage test Function Range Value V Frequency Hz Deviation allowed V V DC 2 0 V 1 9 DC 33 03 V DC 2 0 V 1 9 DC 33 u V DC 240 0 V 190 0 DC 3 335 m V DC 240 0 V 240 0 DC 4 100 m V DC 240 0 V 190 0 DC 3 335 m V DC 240 0 V 240 0 DC 4 100 m V DC 1000 0 V 1000 0 DC 55 m V DC 1000 0 V 1000 0 DC 55 m Table II 20 V AC Basic range with linearity test Function Range Value V Frequency Hz Deviation allowed value V AC 20 0 V 2 0 1000 1 36 m V AC 20 0 V 4 0 1000
39. terminals properly paying attention both to the calibrator s output terminals and the instrument s input terminals Excessive contact resistance can heat up the terminals and cause calibration errors Excessive and unstable contact resistance has non linear characteristic and can distort the output AC current It is not recommended to connect non standard load to the current output The calibrator is designed to be used for calibration of ammeters Output terminals should be loaded with low and real impedance Although the output is fitted with fast electronic and microprocessor protection high capacitance or inductance can lead to oscillations of output amplifiers and result in damage The instrument to be calibrated can be connected either directly to the front panel terminals or to Opt 140 01 cable adapter If L terminal of the instrument to be calibrated is not grounded then calibrator s U I terminal should be grounded GND U ON GND I ON see Setup menu chapter User Manual v41 105 MC 142 Multifunction Calibrator POWERTEK Connection of a multimeter to be calibrated current range to calibrator s output terminals 30 00000 A Optional current coil can extend the calibrator s current range to 1000 A The coil can be used for calibration of both DC and AC ammeters The clamps of the ammeter must be positioned in angle 90 to the coil When using the current coil no steel or other magnetic objects must be pr
40. to 100 mV mV four wire resistance measurement Q frequency up to 15 kHz Hz temperature measurement using thermocouples C temperature measurement using resistive temperature sensors ue Use of calculation formula Each function of the multimeter can display recalculated measured value The value shown on the display is always calculated according to the formula Y A0 AI X A2 X where X is the value measured by the multimeter Y is the value shown on the display Default setting of the coefficients is AO 0 Al 1 A2 0 This means that directly measured value is displayed on the display If any other recalculation is required enter the desired parameters Parameter AO must be of the same dimension as is in row UNIT e Press METER direct control button and select AO A1 A2 option from the menu using cursor buttons Enter new value using numeric keyboard e Confirm the value by pressing ENTER 40 User Manual v41 POWERTEK MC 142 Multifunction Calibrator e After setting the coefficients use or v cursor buttons to switch to the previous or next menu option The same can be achieved using the potentiometer after pressing the knob Press EXIT display button the close the range selection menu and to return to the basic display If you want to reset a coefficient to original setting press CLR display button Each measurement function of the multimeter has its own independent set of coefficients Sett
41. uA 2 mA 12V 3 5mA 20V 2mA 10 KQ 33 kQ 0 010 4 uA 600 uA 12V 1 2mA 20V 600uA 33 KQ 100 kQ 0 010 1 uA 200 uA 12V 360uA 20V 200uA 100 kQ 330 kQ 0 010 l uA 60 uA 12V 120uA 20V 60uA 330 kQ 1 MQ 0 010 0 2 uA 20 uA 12V 36uA 20V 20uA 1 MQ 3 3 MQ 0 020 40nA 6uA 12V 12uA 20V 6uA 3 3 MQ 10MQ 0 050 10nA 2uA 12V 3 6uA 20V 2uA 10 MQ 33 MQ 0 1 10 nA 600 nA 12V 1 2uA 20V 0 6uA 33 MQ 100MQ 0 2 10 nA 180 nA 12V 0 36uA 20V 0 18uA 100 MQ 1000 MQ 0 5 i 4nA 20 nA 12V 0 luA 20V 0 02uA Specification is valid for four terminal connection using Option 70 Cable adapter For two terminal connection from front panel terminal add 10 mOhm 2 Voltage is expressed in V pk pk Capacitance summary range 0 7 nF to 100 uF resolution 41 2 digit Capacitance uncertaint 700 pF 1 nF 0 5 15 pF 1 nF 3 3 nF 0 5 5 pF 3 3 nF 10 nF 0 5 10 nF 33 nF 0 5 33 nF 100 nF 0 5 100 nF 330 nF 1 330 nF 1 uF 1 l uF 3 3 uF 1 5 3 3 uF 10 uF 1 5 10 uF 100 uF 2 0 AC and DC power energy summary voltage range 0 2 V to 240 V current capability of voltage output depends on the voltage range summary current range 2mA to20A maximal voltage on current output depends on the current range electric power range 0 0004 to 4 8 kVA phase angle PF range 180 to 180 1 to 1 in PF phase angle PF resolution 0 1 0 001 in PF time period range 1 1 sto 1999 s time period accur
42. where it is not allowed Current timeout Time limit for current over Long term loading current terminals with output current over A 10 A exceeded Not allowed on Function cannot be used on Do not use this setting in combination with connected cable AUX output output AUXILIARY adapter Tab 16 Error messages 68 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Functional description of the calibrator Basic blocks Basic functional blocks are front panel keyboard e LCD display output terminals output voltage amplifier 200 V output voltage amplifier 20 A main board voltage amplifier 2 V voltage amplifier 20 V e DC reference voltage with DAC generator feedback circuits e phase shift circuits current ranges generator e multimeter e power line transformer e power supply board e interface GPIB and RS232 User Manual v41 69 OAV IIa ZZ Ndo OF Or L IN LUOJEDIP 2olg 1O BAUOO Ol fld POWERTEK JO DlIoduwuoo JOUSAUOS JUBLIND Pdu suss ova HOA 9L SPOLW SMJ 03 m spou IeMod HUGO epnigdury Jdu jueuno JojDjouob Rus esoud SPO IBMOH opouu jNOgd ubi LAdNI Padu esueg b pdun JO DBUS6 deg SUD juaunz gt JOLSAUO9 UID Io JojDzel Aas o Jouiduuo F zz Az afuDy AZ JOJDJOdWOS Dy n JoJpzo u s ZE oy JOU duup BOUBLBJBJ OG A DZ SBubeY A OZ ova Id ce BIOS JBLWIOJSUO
43. 1 72 m V AC 20 0 V 6 0 1000 2 08 m V AC 20 0 V 8 0 1000 2 44 m V AC 20 0 V 10 0 1000 2 80 m V AC 20 0 V 12 0 1000 3 16 m V AC 20 0 V 14 0 1000 3 52 m V AC 20 0 V 16 0 1000 3 88 m V AC 20 0 V 18 0 1000 4 24 m V AC 20 0 V 19 0 1000 4 42 m Table III User Manual v41 81 MC 142 Multifunction Calibrator POWERTEK AC voltage test Function Range Value V Frequency Hz Deviation allowed V V AC 20 mV 0 019 1000 68 u V AC 200 mV 0 19 1000 270 u V AC 205 M 1 9 1000 442 u V AC 20 0 V 19 0 50 4 42 m V AC 20 0 V 19 0 120 4 42 m V AC 20 0 V 19 0 10000 4 42 m V AC 20 0 V 19 0 20000 15 5 m V AC 20 0 V 19 0 50000 15 5 m V AC 240 0 V 190 0 1000 44 2 m V AC 1000 V 750 0 120 500 0 m Table IV 200 mA DC Basic range with linearity test Function Range Value A Frequency Hz Deviation allowed pA A DC 200 0 mA 0 02 DC 8 A DC 200 0 mA 0 04 DC 10 A DC 200 0 mA 0 06 DC 12 A DC 200 0 mA 0 08 DC 14 A DC 200 0 mA 0 10 DC 16 A DC 200 0 mA 0 12 DC 18 A DC 200 0 mA 0 14 DC 20 A DC 200 0 mA 0 16 DC 22 A DC 200 0 mA 0 18 DC 24 A DC 200 0 mA 0 19 DC 25 A DC 200 0 mA 0 02 DC 8 A DC 200 0 mA 0 04 DC 10 A DC 200 0 mA 0 06 DC 12 A DC 200 0 mA 0 08 DC 14 A DC 200 0 mA 0 10 DC 16 A DC 200 0 mA 0 12 DC 18 A DC 200 0 mA 0 14 DC 20 A DC 200 0 mA 0 16 DC 2
44. 2 A DC 200 0 mA 0 18 DC 24 A DC 200 0 mA 0 19 DC 25 Table V DC current test Function Range Value A Frequency Hz Deviation allowed A A DC 200 0 uA 0 00019 DC 0 115 n A DC 200 0 uA 0 00019 DC 0115 1 A DC 2 0 mA 0 0019 DC 0 430 u A DC 2 0 mA 0 0019 DC 0 430 u A DC 20 0 mA 0 019 DC 2 351 A DC 20 0 mA 0 019 DC 2 5 Table VI 82 User Manual v41 POWERTEK MC 142 Multifunction Calibrator AC current test Function Range Value A Frequency Hz Deviation allowed A A AC 200 0 uA 0 00019 60 0 305 u A AC 2 0 mA 0 0019 60 1 53 41 A AC 20 0 mA 0 019 60 10 5 u A AC 20 0 mA 0 019 120 10 5 u A AC 20 0 mA 0 019 1000 10 5 Qu A AC 20 0 mA 0 019 10000 109 u A AC 200 0 mA 0 19 60 105 u Table VII AC DC high current test Function Range Value A Frequency Hz Deviation allowed value A DC 2 0 A 1 0 DC 250 u A DC 2 0 cA 1 0 DC 250 u A AC 2 0 A 1 0 60 600 u A DC 305 0 A 10 0 DC 4m A DC 30 0 A 10 0 DC 4m A AC 30 0 A 10 0 60 16 m A DC 30 0 A 30 0 DC 17 m A DC 30 0 A 30 0 DC 17 m A AC 30 0 A 30 0 60 45 m Table VIII AC DC power test Function Range Value VA Frequency Hz Deviation allowed VA Table IX Voltage 240V Resistance test Function Range Value Ohm Frequency Hz Deviation allowed Q 0 4W 100 0 Ohm 10 0
45. 30 The address 02 is set by the manufacturer 10 RS232 baud rate xx UP DOWN Indicates the communication speed of RS232 bus UP DOWN display buttons can be used to select 150 300 600 1200 2400 4800 9600 19200 Perfect communication with the PC requires equal values set at the PC and the calibrator 11 Handshake xx OFF Xon Xoff Indicates the communication handshake Display buttons can be used to select OFF or Xon Xoff Perfect communication with the PC requires equal values set at the PC and the calibrator 12 Keyb beep xx ON OFF 46 User Manual v41 POWERTEK MC 142 Multifunction Calibrator This parameter allows the acoustic indication of pressed buttons to be switched off or on ON and OFF display buttons can be used to switch the indication off or on ON is set by the manufacturer This parameter does not control the acoustic indication of output voltages over 100 V and identification of errors 13 Keyb volume xx UP DOWN This parameter allows the volume of acoustic indication to be set UP and DOWN display buttons allow to set the value in the range of 00 to 15 The bigger the value the louder sound This parameter controls the volume of keyboard beep if switched on indication of output voltages over 100 V and identification of errors when controlling the calibrator 14 Brightness xx UP DOWN This parameter sets the contrast of the display UP and DOWN display buttons allow to set the
46. C AC power calibration Jd RESISTANCE Resistance calibration 8 CAPACITANCE Capacitance calibration 9 FREQUENCY Amplitude in frequency mode calibration 10 ANALOG INPUT Multimeter calibration 11 AUTOCAL DC voltage offset correction Selection of calibration type After the calibration menu is displayed one of partial calibrations can be selected Use and v cursor buttons to move the cursor through the list Having selected the required function to be calibrated press SELECT display button The following data are shown the following example is valid for VOLTAGE DC range CALIBRATION MENU Voltage DC Any 28mU AMY 288mU B U 2 U 6 U 28 U B U 288 U 200 U 288 U 1kU SELECT Et The table lists recommended calibration points Having selected the required calibration point using SELECT display button the following data are shown User Manual v41 51 MC 142 Multifunction Calibrator POWERTEK CALIBRATION MENU Voltage DC Range 26m Value Bmu 00327619 888881881111111111111111 WRITE skip Exit Display buttons have the following meaning WRITE new calibration value is entered into the memory old value is irreversibly lost SKIP current calibration step is skipped old value is retained in the memory EXIT current calibration is terminated After this button is pressed the calibration memory hold all data old or new entered and the calibrator returns to the calibration menu It
47. C142 returns a string containing DC SIN PULP PULS PULN RMPA RMPB TRI LIMS PWMP PWMS PWMN SQU depending on the current setting If impedance or temperature sensor simulation is set NONE is returned SOUR VOLT LEVE IMM AMPL lt DNPD gt This command activates the generation of DC or AC voltage depending on the DC or SIN parameter of the FUNC command lt DNPD gt Represents the value of DC or AC voltage expressed in Volts Negative value is accepted for DC voltage Technical Data chapter lists the acceptable ranges If query is sent MC142 returns the set value of current using standard exponential format Example 20 547mV is returned as 2 054700e 002 Positive numbers are not preceded with sign SOUR CURR LEVE IMM AMPL lt DNPD gt This command activates the generation of DC or AC current depending on the DC or SIN parameter of the FUNC command lt DNPD gt Represents the value of DC or AC current expressed in Amperes Negative value is accepted for DC current Technical Data chapter lists the acceptable ranges If query is sent MC142 returns the set value of current using standard exponential format Example 20 547mA is returned as 2 054700e 002 Positive numbers are not preceded with sign SOUR RES LEVE IMM AMPL lt DNPD gt This command activates the generation of a resistance lt DNPD gt Represents the value of the
48. Calibration mode Connect voltage input of the standard multimeter to the voltage output terminals of the calibrator Set appropriate parameters on the standard multimeter to achieve its best accuracy Perform 20 VDC linearity DC voltage 20 VAC linearity AC voltage tests according to the tables I II III IV Deviations should not exceed specified limits Connect current input of standard multimeter to the current output terminals of the calibrator Set appropriate parameters on the standard multimeter to meet its best accuracy Perform 200 mADC linearity DC current AC current tests according to the tables V VI VII Deviations should not exceed specified limits Connect current output terminals of the calibrator to the current terminals of resistance shunt 100 mOhm Connect voltage input of standard multimeter to the voltage terminals of the resistance shunt Set range 100 200 mV on standard multimeter Perform AC DC high current test on range 2 A according to the table VIII Deviation should not exceed specified limit Connect current output terminals of the calibrator to the current terminals of resistance shunt 10 mOhm Connect voltage input of standard multimeter to the voltage terminals of the resistance shunt Set range 100 200 mV on standard multimeter Perform AC DC high current test on range 30 A according to the table VIII Deviation should not exceed specified limit Connect standard powermeter to the appropriat
49. DC 6 m 0 4W 100 0 Ohm 100 0 DC 15 m 0 4W 1000 Ohm 1000 0 DC 100 m 0 4W 10k Ohm 10000 0000 DC 1 0 4W 100k Ohm 100000 0000 DC 10 0 4W 1M Ohm 1 000000e 6 DC 100 0 4W 10M Ohm 1 000000e 7 DC 5k 0 4W 50M Ohm 5 000000e 7 DC 100 k 0 4W 500M Ohm 5 000000e 8 DC 2 5 M Table X Capacitance test Function Range Value F Frequency Hz Deviation allowed F CAP 1 nF 1 00000e 09 1000 20 p CAP 10 nF 1 000000e 8 1000 50 p CAP 100 nF 1 000000e 7 1000 500 p CAP 1 uF 1 000000e 6 500 10n CAP 10 uF 1 000000e 5 120 150 n User Manual v41 83 MC 142 Multifunction Calibrator POWERTEK CAP 100 uF 1 000000e 4 120 2n Table XI 84 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Frequency test Function Range Value Hz Frequency Hz Deviation allowed Hz FREQ 1 kHz 1000 0 50 m Table XII Multimeter test Function Range Value Hz Frequency Hz Deviation allowed FREQ 1 kHz 1000 0 Hz DC 50 mHz V DC 10 V 10 0 V DC 1 3 mV V DC 10 V 10 0 V DC 1 3 mV A DC 25 mA 0 020 A DC 3 3 UA A DC 25 mA 0 020 A DC 3 3 UA V DC 20 mV 0 019 V DC 11 pV V DC 20 mV 0 019 V DC 11 pV V DC 200 mV 0 19 V DC 45 uV V DC 200 mV cQ L9 V DC 45 pV V DC 2V 1 9 V DC 387 pA V DC 2V 1 9 V DC 387 pA 0 4W 200 Ohm 100 0 Ohm DC 30 mQ 0 4W 2 kOhm 1000 0 Ohm DC 210 mQ Table XIII User Manual v41 85 MC 142 Multifunction Calibrator POWERTEK
50. EK MC 142 Multifunction Calibrator Setting relative deviation All function modes of the calibrator except frequency mode allow a relative deviation of output value from the main data to be set using a separate display Relative deviation is displayed in the minor data section of the display and is designated with A 00 0000 symbol The relative deviation can be entered using one of the methods described above e g using the numeric keyboard cursor keys or the potentiometer Setting relative deviation using numeric keyboard e keep pressing the center cursor button until symbols appear under the relative deviation value in the minor data section of the display e enter the desired deviation and confirm the value by pressing display button or by pressing ENTER on the numeric keyboard e the auxiliary line below the main data on the display displays the total value of output signal including the unit of measurement e the value of the signal at output terminals is the value indicated by the main display A DUTP IT 18 18 2888 12 19 OFF Local 10 00000 U A BE BBBBZ 1888 88 Hz L Bi15 7 T4 Shape ne Accuracy 8 8352 INPUT W ACAL Esit Maximum relative deviation which can be entered is 30 000 The deviation can be positive or negative If negative deviation is desired press the display button labeled If positive deviation is then desired
51. J AA LOG AA LOQ RZY kel duUUo OG A ODO Dy A OOZ JBUUOJSUDJ a Ov A 0004 SUDY MI LOW MC 142 Multifunction Calibrator 7 eee A 00Z ebuny User Manual v41 70 POWERTEK MC 142 Multifunction Calibrator 2 20 V DC voltage ranges The functional scheme is shown in the picture below DA convertor Hi 20 V amplifier Lo There is a DC reference voltage source integrated within the 22bit measurement converter Its output is fed to the output stage for 2 and 20 V range Output voltage present at Hi and Lo terminals is sensed by sensing wires Feedback eliminates the influence of amplifier s output impedance and of the resistance of wires within the calibrator 200 V DC voltage range The block diagram functional scheme is shown in the picture below DA convertor 20V amplifier The scheme is similar to 2 and 20 V ranges A 240 V power amplifier with electronic fuses is connected to the output of 20 V amplifier 200 amplifier 2 to 200 V AC voltage ranges The functional scheme is shown in the picture below DA Error Feedback convertor amplifier amplifier User Manual v41 71 MC 142 Multifunction Calibrator POWERTEK The calibrator s built in generator generates a sine wave with voltage controlled amplitude The frequency is derived from microprocessor control circuit s crystal oscillator The signal is fed to 20 V or 200 V amplifier and then to output terminal
52. POWERTEK MC 142 Multifunction Calibrator MC 142 Multifunction Calibrator Operation Manual Powertek User Manual v41 1 MC 142 Multifunction Calibrator POWERTEK Content Operan n Manual o R O OO O EA ok O 1 List OF GOES TRUM rcc REIP 4 Basic Information eic eio OOO EE EEE EO CEE OWCE 5 Preparation JOM opekattoOh iocur ox Eo Die OO OOO 6 Inspecting package contents selecting the installation location eere eere eene eene 6 POWET 0M p Q 6 Warm up inrer 6 IOUEIdQuIEORULTI T 7 SOINE edes 7 NEVER 7 Description Of Controls iaces e OOOO AW A GOO oesi 8 Front panel se NONE KEN RECE A NEO 8 riarum n 14 Co tr l of the CONDOR RP essar SSi 15 Selection of functio sser sesser eresien wad onsa seden 15 Setting the value of output signal seeseesoeseesoesoesossoosoesossoesossossossossossossosssesossoesossossossossossossossossossosso 15 Setting relative deviation P 17 Change of value by factor of ten 1 eerie eee eerie eese eese o wa o s etna etna tasas etas owa tas e tas e tse tasse tasas ena 18 Connection disconnection of output terminals c eeeeee eese eres eese teens tn ens tn o oaooao 0000000 18 Setting the frequency M
53. Simulated resistance capacitance is connected to output terminals OUTPUT Setting relative deviation Keep pressing the center cursor button until value A xx xxxx symbols appear under the relative deviation e The value can be set using numeric keyboard potentiometer or cursor buttons Confirm the value by pressing display button or by pressing ENTER Limitations resulting from electronic simulation Electronic simulation of resistance and capacitance allows setting of a wide range of values with accuracy sufficient for calibration of common multimeters Electronic simulation has the following limitations measurement current supplied by the multimeter to be calibrated must not exceed the value specified by the calibrator s documentation If the current is exceeded the accuracy of simulated value is not guaranteed e maximum peak voltage at Hi Lo terminals supplied by the multimeter to be calibrated must not exceed specified limits If the test voltage is exceeded calibrator disconnects output terminals Overload message is displayed on the display Frequency dependence of resistance and capacitance Electronic simulator of resistance can be used with DC and AC test signal Electronic simulator of capacitance can be used in AC range from 20 Hz to 1000 Hz Generation of electric power and energy User Manual v41 25 MC 142 Multifunction Calibrator POWERTEK The multifunction calib
54. The rectangles are positive i e switching between 0 and amplitude PULSymmetrical sets AC squarewave signal for voltage or current modes The amplitude and duty cycle can be set The rectangles are symmetrical i e switching between amplitude and amplitude PULNegative sets AC squarewave signal for voltage or current modes The amplitude and duty cycle can be set The rectangles are negative i e switching between amplitude and 0 RMPA sets AC output signal ramp shape for voltage or current modes The amplitude can be set The output switches between amplitude a amplitude RMPB sets AC output signal ramp shape for voltage or current modes The amplitude can be set The output switches between amplitude a amplitude TRIangel sets AC output signal triangular shape for voltage or current modes The amplitude can be set The output switches between amplitude a amplitude LIMSinusoid sets AC output signal sinus shape with limitation of amplitude for voltage or current modes The amplitude can be set The output switches between amplitude a amplitude PWMPositive sets POS type output signal digital pulse width modulation PWMSymmetrical sets SYM type output signal digital pulse width modulation PWMNegative sets NEG type output signal digital pulse width modulation SQUare sets HSO type output signal digital pulse output User Manual v41 89 MC 142 Multifunction Calibrator POWERTEK If query is sent M
55. acy 0 01 0 1 s time setting resolution 0 1s frequency range DC 40 Hz to 400 Hz frequency resolution 6 digit minimum step 0 001Hz DCV uncertainty See table of DCV uncertainty User Manual v41 115 MC 142 Multifunction Calibrator POWERTEK DCI uncertainty 3 3 3 1 5 2 00000 mA 20 00000 mA 0 05 2 20 0000 mA 200 0000 mA 0 05 10 0 200000 A 2 000000 A 0 05 100 2 00000 A 20 00000 A 0 05 2000 Continuous current in range bellow 10 A In range 10 to 20 A limited time to 30 s DC POWER uncertainty Uncertainty of DC power can be calculated from the following formula dP V dU d 0 017 96 where dP is uncertainty of output power dU is uncertainty of set voltage dl is uncertainty of set current DC ENERGY uncertainty Depends on voltage current time values The best uncertainty is 0 016 ACV uncertainty See table of ACV uncertainty ACI uncertainty 2 00000 mA 20 00000 mA 0 05 2 20 0000 mA 200 0000 mA 0 05 10 0 200000 A 2 000000 A 0 05 100 2 00000 A 20 00000 A 0 05 2000 Continuous current in range bellow 10 A In range 10 to 20 A limited time to 30 s PHASE uncertainty Frequency range Hz Phase accuracy do 40 000 200 000 200 001 400 000 AC POWER uncertainty Uncertainty of AC power can be calculated from the following formula for active power dP V dU d dPF 4 0 037 for
56. alibrating the power and energy meters with separate voltage and current circuits it is advisable to select GND U ON and GND I ON both grounding methods on on the MC 142 calibrator This setting will ground both the current and voltage output of the calibrator If the instrument to be calibrated has electrically connected and not grounded current and voltage inputs GND U ON and GND I OFF should be selected on the MC 142 calibrator If Lo and I terminals on the calibrator are connected AND the same terminals are connected at the instrument to be calibrated resulting voltage drop at the current cables can damage the relay which interconnects Lo and I terminals with GND terminal in the calibrator Operating examples chapter provides more information concerning correct connection of powermeters and energy meters to the calibrator Uncertainty calculation of set power 30 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Uncertainty of set power displayed on the Accuracy line of the display is calculated according to the following formula for active power dP V dU dP dPF 0 03 for reactive power dP v dU dP dPF 0 037 94 for apparent power dP V dU dP 0 037 94 where dP is the uncertainty of set power 96 dU is the uncertainty of set voltage 96 dI is the uncertainty of set current 96 dPF is the uncertainty of set PF cosq 96 dPF is the uncertainty of set sing 96 Generation
57. ange and 200 and 2 kQ resistance ranges Cable adapters Option 40 two wire adapter and Option 60 four wire adapter are necessary to connect the multimeter Due to the fact that the precision of the built in multimeter is comparable to the precision of the calibrator in resistance small voltage and current ranges external calibrator of higher precision class should be used to calibrate the built in multimeter If external calibrator is not available the calibrator can be used to calibrate the built in multimeter but it has to be taken into account the fact that the precision of the calibration can be insufficient An 81 2 digit multimeter is recommended for calibration a 10 V DC voltage range calibration Connect adapter Option 40 to the AUXILIARY connector on the front panel e Select ANALOG INPUT from the calibration menu Press SELECT display button to select the first calibration point 0 mV Make short on adapter Option 40 e After the value stabilizes press WRITE display button to write new calibration value Connect input voltage terminals of external multimeter to Hi Lo output terminals of the calibrator You can use test wires which are part of basic delivery Connect Option 40 H input wire of adapter Option 40 to the Hi output or the calibrator and L input wire of adapter Option 40 to the Lo output on the calibrator If necessary adjust the zero point of the external multimeter before connecting the ca
58. ange change using x10 10 display buttons or using the potentiometer e Output power is changed by changing the value of output current 16 18 2666 12 37 0 930000 kU 1 Phase 8 809 58 888 Hz U 238 6688 U 84 864348 A Accuracy 8 8 u De User Manual v41 27 MC 142 Multifunction Calibrator POWERTEK 3 28 Setting the voltage The main power value can be changed by changing the voltage 18 18 2888 12 38 1 150000 kW Phase 48 89 f 38 888 Hz U 238 8888 U 85 888868 A 225 lud lud 17 Exit Select P E mode and then keep pressing the center cursor button until symbols appear under the voltage U xxx xxxx V The value can be set using numeric keyboard and confirmed by pressing uV mV V display button The value can be set using cursor buttons or potentiometer as well Main power value is recalculated using new set voltage and existing setting of current and power factor Setting the current The main power value can be changed by changing the current Select P E mode and then keep pressing the center cursor button until symbols appear under the current I xx xxxx A The value can be set using numeric keyboard and confirmed by pressing uA mA A display button The value can be set using cursor buttons or potentiometer as well Main power value is recalculated using new set current and existing setting of voltage and power factor 18
59. ard exponential format Example 20 5 C is returned as 2 050000e 001 SOUR TEMP THER RJUN lt DNPD gt This command sets the temperature of cold end of thermocouple lt DNPD gt Represents the temperature expressed in the units set by the UNIT command Technical Data chapter lists the acceptable ranges Example to set the temperature of cold end of thermocouple to 25 C TEMP THER RJUN 25 cr If query is sent MC142 returns the set temperature using standard exponential format Example 20 5 C is returned as 2 050000e 001 SOUR TEMP THER TYPE lt CPD gt B E J K N R S T This command sets the type of thermocouple to be simulated Example to activate the simulation of S type thermocouple at 350 C TEMP THER 350 TEMP THER TYPE S lt cr gt If query is sent MC142 returns the set type thermocouple B E J K N R S T SOUR TEMP PRT LEVE IMM AMPL lt DNPD gt This command activates the simulation of resistance temperature sensors resistance generation lt DNPD gt Represents the temperature expressed in the units set by the UNIT command Technical Data chapter lists the acceptable ranges If query is sent MC142 returns the set temperature using standard exponential format Example 20 5 C is returned as 2 050000e 001 SOUR TEMP PRT TYPE lt CPD gt PT385 PT392 NI This command sets the type of resistance temperature sensor to
60. ator Overloading the terminals When external circuit connected to current output terminals is disconnected or there is higher voltage at the load than permitted the calibrator disconnects the output terminals and displays Overload I output message The same message can be displayed when 50 turn coil is used for AC current output at frequencies above 80 Hz It depends on the set current and the type of ammeter connected If the output terminals are disconnected due to time limitation of output current over 10 A the calibrator displays Current timeout message Generation of non harmonic shapes The multifunction calibrator can generate non harmonic periodic signals with predefined shape To allow the setting of a non harmonic output shape the calibrator must be switched to AC U or AC I mode In both cases an indication of the type of output shape Shape xxxxx is displayed under the frequency value Press the respective display button to change the shape of the output signal The calibrator can generate the following shapes SINE harmonic PWM POS squarewave positive with adjustable duty cycle e PWM SYM squarewave symmetrical with adjustable duty cycle e PWM NEG squarewave negative with adjustable duty cycle e RAMPA ramp symmetrical positive e RAMPB ramp symmetrical negative e TRIANGLE triangular symmetrical LIM SINE harmonic with amplitude limitation truncated sin Generation of non harmonic sig
61. ator POWERTEK CAPACITANCE function nominal value F set limits F range F 700 p 5p 700p 1n In 5p 1n 3 3n 3 3n 5p 1n 33n 33n 5p 3 3n 10n 10n 10p 3 3n 10n 10n 10p 10n 33n 33n 10p 10n 33n 33n 50p 33n 100n 100 n 50p 33n 100n 100 n 50p 100 n 330 n 330 n 250p 100n 330n 330n 250p 330n 1u lu 250p 330n 1lu lu In 1u 33u 33u 2n 1u 33u 33u 2n 33u 10u 10u 5n 33u 10u 10u 5n 10u 100u 100u 5n 10u 100u Tab 13 Capacitance FREQUENCY function amplitude calibration nominal value V set limits V range V 0 0 10u zero calibration 10 1m 10 slope calibration Tab 14 Frequency ANALOG INPUT multimeter function voltage current resistance calibration zero calibration slope calibration zero calibration slope calibration zero calibration slope calibration zero calibration slope calibration zero calibration slope calibration zero calibration slope calibration zero calibration slope calibration Tab 15 Multimeter For calibration of ranges 2 10 V and 20 mA cable adapter Option 40 must be used For calibration of resistance ranges cable adapter Option 60 is necessary For calibration of voltage ranges 20mV 200mV 2V cable adapter Option 80 has to be applied 58 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Full calibration procedure Following pages describe procedure of the full calibration Required instruments Following instruments are required for calibration
62. be used for calibration Specification of the calibrator is valid when recommended frequency is used User Manual v41 55 MC 142 Multifunction Calibrator POWERTEK POWER DC function DC current calibration nominal value A set limits A range A zero calibration zero calibration slope calibration slope calibration zero calibration zero calibration slope calibration slope calibration zero calibration zero calibration slope calibration slope calibration zero calibration zero calibration slope calibration slope calibration Tab 10 DC POWER POWER AC function AC current calibration Tab ll AC POWER Other then recommended frequency can be used for calibration Specification of the calibrator is valid when recommended frequency is used 56 User Manual v41 POWERTEK MC 142 Multifunction Calibrator RESISTANCE function nominal value Q set limits Q range Q 100k 2 5 33k 100k 100k 2 5 100 k 330k 330k 10 100 k 330k 330k 10 330k 1M 1M 50 330k 1M 1M 50 1 M 3M3 3M3 400 1 M 3M3 3M3 400 3M3 10M 10M 2k 3M3 10M 10M 2k 10M 33 M 33 M 15k 10M 33 M 33 M 15k 33M 100M 100 M 50k 33 M 100M 1G 1M 100M 1G 22k 0 4 linearity 22k 0 4 linearity Tab 12 Resistance For resistance mode calibration cable adapter Option 70 Connect standard multimeter to the four output terminals on the currently connected cable adapter User Manual v41 57 MC 142 Multifunction Calibr
63. bles internal and external multimeters are in parallel e Press SELECT display button to select 10 V calibration point Red light is lighting all terminals on calibrator are automatically ON e Output xx xxxxxx V is displayed in the bottom part of the display showing the set value of output voltage This value can be changed using the potentiometer or cursor button e Adjust the calibrator s output voltage so that the external multimeter shows 10 0000 V e After the value stabilizes press WRITE display button to write new calibration value If calibration in this point is not required press SKIP Terminals of multimeter will switch OFF e Disconnect both the external and built in multimeter b 20 mA DC current range calibration Leave input terminals of Option 70 adapter OPEN User Manual v41 63 MC 142 Multifunction Calibrator POWERTEK 64 d e Make short on calibrator output terminals I I e Press SELECT display button to select the first calibration point 0 mA e After the value stabilizes press WRITE display button to write new calibration zero value e Disconnect short on I I terminals Connect L input wire of adapter Option 40 to the I output on the calibrator H input wire of adapter to the minus current input on standard multimeter and I output terminal of the calibrator to the positive current input of standard multimeter Calibrator current output input of the internal multimeter and c
64. calibrator Set appropriate values of DC voltage on the calibrator according to the table XIII and perform test of meter DC voltage ranges 20mV 200mV and 2V Deviation should not exceed specified limit Note Because accuracy of calibrator output is not accurate enough in all points use external standard multimeter connected in parallel to the output terminals to obtain exact value of DC voltage on the output terminals Connect Option 60 to the calibrator auxiliary conncetor Set resistance function in SETUP MENU of built in meter Make four wire short on the Option 60 banana terminals Use ZERO function of the build in meter to exclude parameters of the adapter Connect standard resistor 100 Ohm to the adapter Use four terminal technique Perform multimeter test on resistance range 200 Ohm according to the table XIII Deviation should not exceed specified limit Use the same procedure to test resistance range 2000 Ohm Disconnect cable adapter Option 60 and connect distortion meter to the voltage output terminals of the calibrator Set output voltage 10 VAC frequency 1000 Hz and sin waveform Check harmonic distortion of output signal It should not exceed 0 05 User Manual v41 79 MC 142 Multifunction Calibrator POWERTEK If calibrator is out of limits is in some points of this test appropriate function and range should be recalibrated It is not necessary to recalibrate all functions but only this one which does not meet
65. cceptable ranges which depend on the selected function mode If query is sent MC142 returns the set value of the current using standard exponential format Example 20 5kHz is returned as 2 050000e 004 SOUR FREQ DUTY lt DNPD gt This command sets the duty cycle of PULP PULS PULN PWMP PWMS PWMN function modes Examples To set symmetrical squarewave voltage signal 10V with defined duty cycle VOLT 10 0 FUNC PULS FREQ DUTY lt DNPD gt lt cr gt 92 User Manual v41 POWERTEK MC 142 Multifunction Calibrator To set digital frequency POS signal with defined duty cycle FUNC PWMP FREQ DUTY lt DNPD gt lt cr gt lt DNPD gt Represents the duty cycle in percent 0 to 100 can be set If query is sent MC142 returns the set value of the duty cycle using standard exponential format Example 25 is returned as 2 50000e 001 SOUR FREQ VOLT lt DNPD gt This command sets the amplitude of PWMP PWMS PWMN signals Examples To set the amplitude of PWMP digital frequency signal FUNC PWMP FREQ VOLT lt DNPD gt lt cr gt lt DNPD gt Represents the voltage in Volts 0 000 to 10 000 V can be set If query is sent MC142 returns the set value of the amplitude using standard exponential format Example 2 05V is returned as 2 05000e 000 SOUR FREQ ATTE lt DNPD gt This command sets the attenuation of digital SQU frequency signal Examples To set the attenuation of high frequenc
66. connect the calibrator to other voltage than set by the voltage selector Do not block the vent openings located at the rear panel and bottom panel The calibrator must not be operated in dusty environment It was designed to be used in a laboratory No liquid or small objects can be permitted to enter the calibrator through the vent openings Do not switch the calibrator outside its operating temperature range Connect the instruments to be calibrated to proper output terminals There is no way of protecting the calibrator from the damage caused by some improper connections Do not damage the output terminals by plugging in bananas thicker than the terminals were designed for Whenever possible use the setup menu to ground Lo output terminal GND U ON setup function Do not overload the power stages by leaving the calibrator switched on with the load connected for a long time especially on 30 A current range and 200V and 1000 V voltage ranges If the instruments to be calibrated are not connected to calibrator s output terminals using original cables ensure that cables suitable for the calibration voltage and current are used Maximum output voltage can reach 1000 V AC and the maximum output current can reach 30 A AC Regular maintenance The calibrator does not require any special maintenance of electrical or mechanical parts If is gets dirty the case and the display can be cleaned by a wool rag moistened with alc
67. couple temperature sensors and a built in multimeter which can be used simultaneously Transducers of various types regulators and sensing units can be therefore checked without the need for additional measuring instruments Basic features of the calibrator include generation of calibrated DC and AC voltage in the range of 0 uV to 1000 V DC and AC current in the range of 0 UA to 30 A 50 uA to 1000 A when using a 50 turn coil The best accuracy of the calibrator is 0 0015 for DC voltage Maximum frequency range is 20 Hz to 100 kHz The calibrator can generate periodic non harmonic signal with defined duty cycle This facilitates especially the checks of multimeters and their accuracy when measuring non harmonic DC signals The calibrator can also simulate a resistance or capacitance Resistance range is 0 to 1000 MQ capacitance range is 1 nF to 100 uF the accuracy suits the calibration of common multimeters Basic accuracy of resistance ranges is 0 015 Basic accuracy of capacitance ranges is 0 5 Frequency ranges of the calibrator can generate a squarewave signal with definable and calibrated duty cycle and amplitude in the 1 mV to 200 V range and 0 to 10 kHz frequency range Moreover squarewave signal with very steep rising edge can be generated up to 20 MHz Frequency ranges can be used to calibrate the corresponding frequency ranges of multimeters as well as to calibrate the input sensitivity and time bases of oscilloscopes Powermete
68. cted in all other modes The multimeter allows the measurement of small DC voltages in the range of 0 to 2 V using Option 80 cable adapter Connect inner two wires Hu and Lu to the object To activate the measurement select mVDC function mode using METER button in the function menu and press INPUT to measure the input value Measurement of resistance or temperature using resistance temperature sensors Resistance can only be measured using four wire connection using Opt 60 cable adapter with four bananas labeled Hi Hu Lu Li Their meaning is as follows Hi current terminal H Hu voltage terminal H Lu voltage terminal L Li current terminal L During the measurement of resistance or temperature using resistance temperature sensors the rules applicable to the four wire connection must be observed Connection of Pt100 sensor using Opt 60 cable User Manual v41 109 MC 142 Multifunction Calibrator POWERTEK 30 00000 A Lu Li Measurement of temperature using thermocouples The built in multimeter allows the measurement of mV DC and temperature using external thermocouple Option 80 cable adapter is required Temperature of cold junction must be set manually To activate the measurement select T TC function mode using METER button in the function menu and press INPUT to measure the input value Connection of thermocouple to Option 80 cable adapter Testing of control unit transducers and evaluation u
69. cted to I I terminals frequency output is connected to FREQ terminal All other functions voltage resistance capacitance are connected to Hi Lo terminals GND terminal is connected to the chassis of the calibrator It is connected to the ground terminal of the mains plug Using the SETUP MENU of the calibrator the output terminals of the calibrator can be grounded as well Grounding is done internally by connecting Lo and GND terminals using a relay This circuit design is suitable for most calibrations when the object multimeter being calibrated is floating AUXILIARY connector creates input of internal multimeter It includes a limited range of output signals of the calibrator as well The layout of individual pins and their meanings are listed in the following table Auxiliary connector can be used with one of cable adapters Opt 40 60 70 80 90 Opt 140 01 Calibrator can recognize which type of adapter is connected and displays the information on front panel display 10 User Manual v41 POWERTEK MC 142 Multifunction Calibrator pin label OVSMER GND SIMLI SIMLU TESTI TEST3 OVSMER NC signal common terminal of multimetr power supply source ground protection earth RC simulator output current terminal Li RC simulator output voltage terminal Lu ground protection earth common terminal of multimeter input low output terminal for DC voltage range low output terminal for DC current range sort fun
70. ction output contact 2 of sort relay resistance temperature sensor input terminal Li resistance temperature sensor input terminal Lu input terminal L on ranges 20 200 2000 mV identification terminal of actually used adapter identification terminal of actually used adapter common terminal of multimeter power supply source not used RC simulator output current terminal Hi RC simulator output voltage terminal Hu not used multimeter input terminal for voltage current ranges high output terminal for DC voltage range high output terminal for DC current range sort function output contact of relay resistance temperature sensor input terminal Hi resistance temperature sensor input terminal Hu input terminal H on ranges 20 200 2000 mV identification terminal of actually used adapter Tab 3 Auxiliary connector description Limitation Umax 10Vpp Imax 40mA Umax 10Vpp Imax 40mA Umax 50Vpp Imax 100 mA Umax 10Vpp R lt 2 kQ Umax 10Vpp R lt 2 kQ Umax 10Vpp Imax 40mA Umax 10Vpp Imax 40mA Umax 25 Vpp Imax 25 mA Umax 20 Vss Imax 25 mA Umax 50Vpp Imax 100 mA Umax 10Vpp R lt 2 kQ Umax 10Vpp R lt 2 kQ Functional inputs and outputs present at the connector can be best utilized using supplied cable adapters LCD display shows all information provided by the calibrator e g set parameters of the signal error messages setup information The display is divided to several information s
71. d calibration point 100 Q e After the value stabilizes write calibration value of resistance standard to the lower line and confirm by pressing WRITE 1000 resistance range calibration Make short of all four Option 60 input wires e Press SELECT display button to select the first calibration point 0 e After the value stabilizes press WRITE display button to write new calibration value 1000 calibration Connect resistance standard 1000 to the input terminals Use four wire technique e Press SELECT display button to select the second calibration point 1000 Q e After the value stabilizes write calibration value of resistance standard to the lower line and confirm by pressing WRITE 20 mV voltage range calibration User Manual v41 POWERTEK MC 142 Multifunction Calibrator g User Manual v41 Connect cable adapter Option 80 to the AUXILIARY connector Make short of test wires of Option 80 adapter Press SELECT display button to select the first calibration point of 20 mV range 0 mV After the value stabilizes press WRITE display button to write new calibration value Connect external standard multimeter set to the mVDC function to the Hi Lo output terminals Use test wires from basic delivery Connect HU test wire of cable adapter to the Hi terminal on the calibrator and LU test wire of cable adapter to the Lo terminal on the calibrator Both build in meter and external multimeter are i
72. depends on set value of voltage current time and PF The best uncertainty is 0 07 for apparent energy Frequency summary range 0 1 Hz to 20 MHz frequency uncertainty 0 005 frequency resolution 6 digit minimum step 0 001Hz output BNC connector located on the front panel modes PWM square wave output with calibrated duty cycle ratio frequency and amplitude HF square wave output with calibrated frequency and amplitude Mode PWM frequency range 0 1 Hz to 100 kHz voltage range mV to 10 V duty cycle ratio range 0 01 to 0 99 wave form square symmetrical positive negative duty cycle ratio uncertainty 0 05 Amplitude uncertainty 1 00000 mV 20 00000 mV 0 2 50 uV 20 0000 mV 200 0000 mV 0 1 50 uV 0 200000 mV 2 000000 V 2 00000 V 10 00000 V Mode HF frequency range 0 1 Hz to 20 MHz output impedance 50 Q wave form square symmetrical duty cycle ratio 1 1 amplitude 4 V pk pk output amplitude range 0 10 20 30dB 1 dB amplitude uncertainty 10 rise fall time lt 3 ns User Manual v41 117 MC 142 Multifunction Calibrator POWERTEK Temperature sensors simulation temperature scale ITS 90 PTS 68 types of sensors RTD TC A RTD resistance sensors types Pt 1 385 Pt 1 392 Ni range of RO setting 20 Q to 2 kQ temperature range 200 to 850 C temperature uncertainty 0 04 C to 0 5 C see table bellow resolution 0 1 Ranges and uncertaintie
73. e Minimum frequency for squarewave signals is 0 1 Hz for all other wave shapes 20 Hz Current summary range DCI 0 uA 30 A with current coil 140 50 to 1000A summary range ACI 1 uA 30 A with current coil 140 50 to 1000 A internal ranges 200 uA 2 mA 20 mA 200 mA 2 A 30 A resolution 61 2 digit frequency resolution 6 digit minimum step 0 001Hz frequency range 20 Hz to 5 kHz bellow 200 mA 20 Hz to 1000 Hz bellow 20 A 40 Hz to 500 Hz in range 20 to 30 A DCI uncertainty value uA Min compliance voltage V 3 0 0000 uA 200 0000 uA 0 05 0 02 0 200000 mA 2 000000 mA 0 02 0 1 2 00000 mA 20 00000 mA 0 01 0 6 20 0000 mA 200 0000 mA 0 01 6 0 200000 A 2 000000 A 0 015 100 2 00000 A 20 00000 A 0 02 2 000 20 00000 A 30 00000 A 0 02 0 003 I 20 2000 ACTuncertainty 20Hz 1kHz 1 kHz 5 kHz 5 kHz 10 kHz 1 0000 uA 200 0000 uA 0 15 0 02 0 30 0 22 0 200000 mA 2 000000 mA 0 07 0 2 0 20 1 0 50 1 4 2 00000 mA 20 00000 mA 0 05 1 0 20 10 0 50 14 20 0000 mA 200 0000 mA 0 05 10 0 20 100 0 50 140 0 200000 A 2 00000 A 0 05 100 2 00000 A 20 00000 A 0 10 6000 20 00000 A 30 00000 A 0 1 0 003 I 20 6000 Continuous current in range bellow 10 A In range 10 to 30 A limited time to 60 s for current bellow 20 A and 30 s bellow 30 A Frequency range for current 20 to 30 a is 40 Hz to 500 Hz Tis s
74. e SRE The value of unused bit 6 shall always be zero The Service Request Enable Register is written with the SRE common command followed by an integer value 0 191 Sending the SRE common command followed by a zero clears the SRE A cleared register does not allow status information to generate a rsv local message and thus no service request are issued The Service Request Enable Register is cleared upon power on ESR Event Status Register The Event Status Register is a two byte register in which the higher eight bits are always 0 and the lower eight bits represent various conditions of the MC142 calibrator The ESR is cleared when the power is turned on and every time it is read Bit configuration of Event Status Register PON Power On bit 7 This event bit indicates that an off to on transition has occurred in the device s power supply URQ User Request bit 6 This event bit indicates disconnecting or connecting of any cable adapter to the auxiliary connector on the front panel CME Command Error bit 5 This event bit indicates that an incorrectly formed command or query has been detected by the MC142 EXE Execution Error bit 4 This event bit indicates that the received command cannot be executed owing to the device state or the command parameter being out of bounds DDE Device Dependent Error bit 3 This event bit indicates that an error has occurred which is neither a Command Error a Query Error nor an Execution Err
75. e provided function button DC voltage AC voltage DC current AC current resistance capacitance power energy frequency internal multimeter simulation of temperature sensors Tab I One touch buttons After the function mode is changed the parameters of the respective function are restored If the respective function was never used the calibrator resets to its reference values Reference values for individual functions are listed below function value parameters DC voltage 10V AC voltage 10 V f 1000 Hz DC current 100 mA AC current 100 mA f 1000 Hz resistance 100 kQ capacitance 1 uF power 100 W f 100 Hz energy frequency 1000 Hz U 1 Vsym multimeter 10 V DC voltage simulation of temperature sensors 100 C Pt 100 1 385 ITS90 cold junction temperature of TC sensors 23 C R Tab 2 Reference values ial U 100 V I 1 A PF power factor 1 LA active power is displayed in Watts User Manual v41 9 MC 142 Multifunction Calibrator POWERTEK 6 Output input terminals buttons OUTPUT button is used to connect the output signal of the calibrator to the output terminals The connection is confirmed by red LED and a symbol at the display METER button can be used to connect the input terminals to the internal multimeter The connection is confirmed by green LED 7 Output input terminals Output signal of the calibrator is connected to the output terminals Current ranges are conne
76. e output and current terminals of the calibrator User Manual v41 POWERTEK MC 142 Multifunction Calibrator 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Perform AC DC power test according to the table IX Deviations should not exceed specified limits Connect voltage terminals of the calibrator to the Hi Lo and Sense H L terminals respectively of the standard multimeter Set resistance mode on multimeter and calibrator as well Use four wire technique for connection of multimeter for testing on nominal values bellow 10 kOhm Use autozero function of standard multimeter to eliminate thermoelectric voltages and residual resistances of multimeter and cables before measuring Connect adapter Option 70 to the AUXILIARY connector Perform resistance test according to the table X Deviations should not exceed specified limits Connect voltage terminals of the calibrator to the RCL meter Switch GND U and GND I OFF in SETUP MENU In common RCL meters measuring circuit must not be grounded Connect source terminal of RCL meter to the Lo output terminal of the calibrator Perform capacitance test according to the table XI Deviations should not exceed specified limits Connect output voltage terminals of the calibrator to the counter Set output voltage 1 VAC frequency 1 kHz Perform frequency test according to the table XII Deviation should not exceed specified
77. e terminals located at the front panel Following output signals can be set only resistance in four wire connection resistance temperature sensor simulation in four wire connection Output signals are available on adapter Option 70 only Calibrator output signals are not limited in any way and can be fully used Calibrator output signals are available on the terminals located at the front panel Calibrator output signals are not limited in any way and can be fully used Calibrator output signals are available on the terminals located at the front panel Tab 5 Cable adapters description 44 each state has its limitation listed in the table Limitation of multimeter s function The multimeter cannot be used If the multimeter is activated FAIL error message appears The multimeter can only be used to measure the external temperature using a Pt100 sensor built into the adapter The multimeter can be used in the following ranges DC voltage up to 12 V DC voltage up to 25 mA frequency up to 15 kHz The multimeter can only be used in the following ranges temperature using TC sensors temperature using RTD sensors resistance up to 2 kOhm Multimeter cannot be used If the multimeter is activated FAIL error message appears The multimeter can be used in the following ranges mVDC voltage up to 2 V TC temperature measurement using external TC sensor The multim
78. ections User Manual v41 11 MC 142 Multifunction Calibrator POWERTEK 8 Display DUTP IT 18 18 2888 12 18 10 00000 U A BE B8887 1888 88 Hz lape ine Accuracy 8 8352 INPUT mA DC 10 0000 mA x 18 18 Shape f Setup la Ib lc Id le 2a 3 2b Ig If The display is divided to three horizontal sections 1 12 OUTPUT section This section displays the set up values of generated signals and the data related to the calibrator status The section includes the following types of data a b c d e Information line designation of display section OUTPUT error messages The messages appear when an attempt is made to set up an invalid state of the calibrator if analogue circuits of the calibrator are overloaded or if a communication error occurs when the calibrator is controlled using GPIB bus real date and time if its display is set up in the setup menu Auxiliary data This line displays the total value of output signal if a non zero relative deviation is set Main data This line displays the main data of the output signal and the unit of measurement using double size signs The line also includes two symbols V A to define the actual position of the cursor during adjustment of the value lt gt buttons can be used to move the cursor and a v buttons to change the value The value can be also changed using the potentiometer Monitoring line This line disp
79. esent in the vicinity 50 cm of the current coil as they would deform the magnetic field and cause big calibration error Connection of current coil EL A Current coil 140 50 Powermeters The calibrator can be used for calibration of DC and AC digital and analogue powermeters and energy meters The following limitations apply voltage 0 2 V to 240 V current 2 mA to20A frequency DC 40 Hz to 400 Hz time 1 1 sto 1999 s phase shift 180 to 180 106 User Manual v41 POWERTEK MC 142 Multifunction Calibrator The display can show active reactive and apparent power and energy values The phase shift between the output voltage and current can be set and displayed as well either as the power factor PF cos q or as the phase shift in degrees In the P E mode the permitted load of the voltage and current outputs is the same as in the voltage and current modes If the output is overloaded the calibrator disconnects the output terminals and displays an error message For calibration of tong powermeters current coil can be used Power factor meters can be calibrated as well Basic connection of a powermeter to the calibrator 30 00000 A Possible methods of grounding of the measurement circuit To prevent the creation of ground loops and to ensure the guaranteed precision of the calibrator the powermeter to be calibrated as well as the calibrator must be properly grounded Depending on the nature of the measurement in
80. essing the OUTPUT button the output terminals of the calibrator are connected disconnected 3 Connection disconnection of multimeter After pressing the INPUT button the multimeter starts measuring the value present at the input terminals depending on the function mode of the multimeter The measurement is only possible when any of Opt 140 xx adapters is connected to the AUXILIARY connector 4 Entry to the setup menu After pressing the SETUP button options of the SETUP MENU appear on the display and the display buttons allow the entry to the calibration mode CALIB Previous function is restored by pressing of EXIT display button Setting the value of output signal AII function modes allow several methods of setting the main value of the output signal Entry of the value using numeric keyboard e use the numeric keyboard to select the desired value After the first digit is entered symbols of unit of measurements are displayed above the display buttons The monitor line displays the symbols e the same entry can be started by pressing the central cursor button e after the entry is complete the value is displayed on the monitor line press the display button below the desired unit of measurement V mV or uV in the example below the value is copied to the main display and the monitor line disappears User Manual v41 15 MC 142 Multifunction Calibrator POWERTEK 18 18 2888 12 13 10 00000 U AZ BE BBBBZ
81. et output current in A When option 140 50 Current Coil is used add uncertainty 0 3 of the set current to the value specified in above table Output current is multiplied by factor 25 or 50 depending on applied coil range Auxiliary parameters i maximal inductive load 100mH_ 100mH 500 uH TDC and AC 50 60 Hz voltage on the load lt 2Vrms Parameter includes non linear distortion and non harmonic noise Distortion in range 20 to 30 A is max 0 5 Function Shape current range 100 uA to2 A wave form square positive negative symmetrical ramp A ramp B triangle truncated sin with THD 13 45 peak value uncertainty 0 3 500 nA displayed values peak effective 114 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Minimum frequency for squarewave signals is 0 1 Hz for all others 20 Hz Resistance summary range 0 Q to 1000 MQ resolution 41 2 digit Resistance uncertainty Range of value Sa Applicable test current Max yoltage current Max voltage current on range on lower range limit higher range limit 02 10 0 03 5 mQ 400 uA 100 mA 100mA 1V 100mA 10 Q 33 Q 0 015 5 mQ 400 uA 100 mA 1V 100mA 3 3V 100mA 33 Q 100 Q 0 010 5 mQ 400 uA 40 mA 3V 100 mA 3 3V 100mA 100 Q 330 Q 0 010 5 mQ j 400 uA 40 mA 3V 30mA 10V 30mA 330Q 1kQ 0 010 400 uA 11 mA 3 3V 10mA 10V 10mA 1 KQ 3 3 kQ 0 010 100 uA 6 mA 12V 12mA 20V 6mA 3 3 KQ 10 kQ 0 010 20
82. et type of approximation table PT385 PT392 MEAS CONF TEMP RTD NRESistance lt DNPD gt This command selects the function RTD of internal multimeter sets the nominal resistance of the resistance temperature sensor to 0 C and switches the multimeter on 10Q to 2kQ can be set lt DNPD gt Represents the nominal resistance in Ohms Example to set the multimeter to resistance temperature sensor Pt100 measurement mode MEAS CONF TEMP RTD NRES 100 lt cr gt If query is sent MC142 returns the set value of nominal resistance using standard exponential format Example 20 5 is returned as 2 050000e 001 96 User Manual v41 POWERTEK MC 142 Multifunction Calibrator MEAS CONF TEMP THER TYPE lt CPD gt B E J K N R S T This command selects the function TC of internal multimeter sets the type of thermocouple and switches the multimeter on Example to set the multimeter to thermocouple R measurement mode MEAS CONF TEMP THER TYPE R lt cr gt If query is sent MC142 returns the set type of thermocouple B E J K N R S T MEAS CONF TEMP THER RJUNction lt DNPD gt This command selects the function TC of internal multimeter sets the temperature of cold junction of selected thermocouple and switches the multimeter on lt DNPD gt Represents the temperature expressed in the unit set by the UNIT command In Technical Data chapter there is list of acceptable ranges Example to
83. eter can be used in the following ranges RTD temperature measurement only Method of connection 140 01 cable adapter connected onto calibrator s terminals Option 40 Cable connected onto calibrator s AUXILIARY connector Option 60 cable end connected onto calibrator s AUXILIARY connector Cable adapter Option 70 installed on AUXILIARY connector Option 80 Cable connected onto calibrator s AUXILIARY connector Option 90 Cable connected onto calibrator s AUXILIARY connector User Manual v41 POWERTEK MC 142 Multifunction Calibrator Setup menu The multifunction calibrator allows many other less frequently used parameters to be set Setup menu is used to set these parameters Setup menu is opened by pressing SETUP display button If output terminals are connected they will be disconnected and the following display appears 18 18 2888 12 52 SETUP MENU Temp scale Temp unit Phase unit Output 148 41 on Off Jj Exit Use or v cursor button or the knob of the potentiometer to browse the menu options Active option is always inverted and when changed the descriptions of display buttons change as well Display buttons show how the respective parameter can be set Each parameter can be changed after the knob of the potentiometer is pressed Press EXIT display button twice to save the parameters when the setting is completed New settings are retained when the calibrator
84. eter or cursor buttons to enter the value Perform the adjustment for all calibration points as usual Press WRITE display button to confirm correct values Disconnect adapter Option 70 from AUXILIARY connector 61 MC 142 Multifunction Calibrator POWERTEK 62 CALIBRATION MENU Resistance Range 16 ft Value Meter 010 0244 9 Capacitance ranges calibration Capacitance ranges calibration is performed by both calibration methods i e setting the checked value and measuring this value with the standard instrument as well as setting the nominal value of the calibrator s measurement range on the external multimeter by adjusting the calibrator s output If the entry of measured value to the calibrator is required VALUE METER is displayed at the respective calibration point The value on the calibrator s display has the same format as the nominal value of the respective calibration point If on the other hand the user is requested to adjust the calibrator s output to set the nominal value of the calibrator s measurement range on the external multimeter VALUE is displayed at the respective calibration point The value on the calibrator s display has general format a Select CAPACITANCE from the calibration menu Select GND U OFF and GND I OFF from the setup menu b Adjust the values of shorted and open terminals of the external RLC meter set the frequency used during the measurement 1000 Hz for 1 nF to 10 nF range 100 Hz
85. eviation of frequency signal amplitude PWM mode or attenuation HF mode duty cycle PWM mode only signal shape PWM NEG POS SYM PWM mode only X X X Set the frequency using numeric keyboard cursor buttons or potentiometer Output signal is not yet OFF User Manual v41 31 MC 142 Multifunction Calibrator POWERTEK connected to the output terminals The information section of the display shows the symbol which informs about the disconnection of output terminals e Connect the object to be calibrated to FREQ terminal e Press OUTPUT button e Red LED is lit above the OUTPUT terminals to indicate the connection of signal to the output connector 18 18 2888 12 41 1 000000 kHz Ax BA ABAZ U 18 888 U PUM 582 Shape PM POS Rccuracu B B8858Z x 18 18 Shape Setup e Output signal with set frequency is present at the output connector Note FREQ connector must not be overloaded In 100 mV to 10V voltage range maximum load is 5 mA In other voltage ranges maximum load is 0 1mA If the output is overloaded the set value is not guaranteed The output is short circuit proof The outer casing of the connector is electrically connected to the chassis of the calibrator Setting relative deviation Keep pressing the center cursor button until value A96 xx xxxx symbols appear under the relative deviation e The value can be set using numeric keyboard
86. for 10 nF to 100 uF ranges Connect Hi Hu terminals to calibrator s Lo output and Li Lu terminals to calibrator s Hi output c Measure the capacitance of internal range capacitors using the RLC meter and write the values into the calibrator The procedure is the same as when calibrating the resistance ranges d Perform the adjustment for all calibration points as usual Press WRITE display button to confirm correct values CALIBRATION MENU Capacitance Range 26nF Value 16nF 00025535 WRITE T skip Exit User Manual v41 POWERTEK MC 142 Multifunction Calibrator 11 12 Amplitude calibration in frequency mode a Select FREQUENCY in the calibration menu b Connect the external multimeter with DC voltage measurement range selected to calibrator s Hi Lo output terminals c Follow the instructions provided on the calibrator s display and the F table to adjust the calibrator s output in the calibration points To adjust the calibrator s output in the calibration points use lt gt v A cursor buttons to adjust the output value Confirm correctly set value by pressing WRITE display button d When calibrating the amplitude of the frequency generation function DC voltage corresponding to the amplitude of output square wave signal is set Built in multimeter calibration Built in multimeter calibration consists of the calibration of 20 mV 200 mV 2V and 10 V voltage ranges one 20 mA current r
87. front panel terminals or through Opt 140 01 cable adapter If L terminal of the instrument to be calibrated is not grounded then calibrator s Lo terminal should be grounded GND U ON see Setup menu chapter Connection of a multimeter to be calibrated voltage range to calibrator s output terminals 30 00000 A E Truncated waveform with defined distortion can be used for testing of multimeters 104 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Connection of a multimeter to be calibrated voltage range to the terminals of 140 01 cable adapter 4 30 00000 A Current ranges All DC and AC current ranges are connected to calibrator s 1 I terminals When using the current output under heavy load 10 to 30 A the runtime is limited to 0 to 60 s The runtime depends on the set current and it is controlled by the microprocessor The user cannot extend the runtime if longer runtime is required the output terminals must be unloaded some time must elapse for examplel min and the load can then be connected again When feeding 2 to 30 A current to the output terminals the output voltage must not exceed approx 1 5 Vrme for currents to 20 A and 0 5Vrms for current to 30 A If the current induces higher voltage on the load the calibrator disconnects the output terminals and displays an error message When ammeters are being calibrated using currents over 1 A it is important to connect the
88. hange in this case depends on the temperature sensitivity of the resistance capacitance Connection disconnection of output terminals After switching on the output terminals are disconnected in all modes Press the OUTPUT button to connect the output signal to the terminals Red LED above the OUTPUT button is lit and the information field on the display shows the following mm symbol Press the OUTPUT button again to disconnect the output terminals Red LED goes off and the information field on the display shows the following o symbol 18 User Manual v41 POWERTEK MC 142 Multifunction Calibrator During mode change output terminals are always disconnected Output terminals are disconnected also when changing between voltage and current ranges or when changing between AC and DC ranges is performed If voltage over 100 V is set in the voltage mode special algorithm must be followed to connect the output terminals The algorithm is described in the Generation of calibrated voltage chapter of this Manual Setting the frequency Frequency can only be selected in AC voltage ACU mode AC current ACI mode power P E mode and frequency f mode In each mode the frequency has a slightly different meaning and the frequency is therefore set in a different manner AC voltage ACU AC current ACI Set value of frequency is included in the minor data section of the display in ACU ACI P E modes
89. hort the I terminals Press OUTPUT button Red LED is lit above the OUTPUT terminals to indicate the connection of simulated electrical power to the output terminals the information section of the display shows the symbol DUTPJT 18 18 2888 12 34 OFF Local L GnduI 1 150000 kW PF 1 888 gt 58 888 Hz U 23 0000 U 85 648888 A Accuracy 8 72 IINPUT u ne x ta 18 Mode f Setup Desired power is connected to output terminals Display modes The calibrator can display AC power in one of three ways apparent power in VA e active power in W e reactive power in VAr 26 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Keep pressing MODE display button to change the function mode Along with mode change the power display depending on set power factor and unit of measurement change as well If DC power is generated it is always displayed in Watts The calibrator can display the phase relation of output voltage and current as power factor 1 to 1 or as phase shift in degrees 0 to 360 SETUP setup menu is used to change the method of displaying the phase relation Power setting modes The calibrator allows several ways of setting the value of generated power 1 Setting the main power value e The main value can be changed using numeric keyboard changing the digit at the cursor position after selecting the cursor position with lt gt buttons by r
90. hosen The resolution of resistance and capacitance depends on the set value and corresponds to 0 01 96 of set value Minimum set value is 0 01 Q Resistance simulation range is 0 Q to 1000 MQ Capacitance simulation range is 0 7 nF to 100 uF Control in the resistance and capacitance mode press R C button on the calibrator The display shows the set resistance e Ifyou want to simulate a capacitance press R C button again The display shows the set capacitance The display shows the following data main data of set resistance capacitance relative deviation of resistance capacitance uncertainty of set resistance capacitance total value of resistance capacitance if non zero deviation is set e Set desired value of resistance capacitance or relative deviation The value can be set using numeric keyboard potentiometer or cursor buttons Simulated resistance capacitance is not yet connected to the output terminals The information section of the display shows the symbol which z informs about 24 User Manual v41 POWERTEK MC 142 Multifunction Calibrator the disconnection of output terminals Connect the object to be calibrated to the output terminals labeled Hi Lo e Press OUTPUT button e Red LED is lit above the OUTPUT terminals to indicate the connection of simulated resistance capacitance to the output terminals The information section of the display shows the symbol
91. icular measurement Applications and desired options DC voltage to 20 V Opt 40 DC voltage to 2 V Opt 80 DC current to 25 mA Opt 40 Resistance to 2 kQ Opt 60 Impulse frequency to 15 kHz Opt 40 External TC temperature sensor Opt 80 External RTD temperature sensor Opt 60 Tab 19 Application of cable adapters Note Cable adapters Option 40 60 70 80 belong to basic delivery Cable adapter is not delivered with the unit but input terminals of the adapter can be applied as well Voltage current and frequency 10 V voltage range 20 mA current range and frequency up to 15 kHz can be measured using Opt 40 cable The connection simple The cable is connected to calibrator s AUXILIARY connector the other end has bananas which connect calibrator to the measured object When making the connection observe the polarity and connect the calibrator s L terminal to the L common or grounded terminal of the measurement instrument To activate the measurement select the respective function mode and press INPUT to measure the input value ATTENTION The input terminals of the built in multimeter are floating Maximum voltage between the input terminals and the chassis is 15 Vpk If this value is exceeded the multimeter can be damaged If the measurement range is exceeded the calibrator displays an error message input terminals are disconnected only in the voltage and current measurement mode and remain conne
92. imits V range V zero calibration zero calibration slope calibration slope calibration zero calibration zero calibration slope calibration slope calibration zero calibration zero calibration slope calibration slope calibration zero calibration zero calibration slope calibration slope calibration zero calibration zero calibration slope calibration slope calibration slope calibration slope calibration Tab 6 DC VOLTAGE VOLTAGE AC function nominal value V set limits V range V recommended frequency Hz Su Tab 7 AC VOLTAGE Other then recommended frequencies can be used for calibration Specification of the calibrator is valid when recommended frequency is used 54 User Manual v41 POWERTEK MC 142 Multifunction Calibrator CURRENT DC function nominal value A set limits A range A zero calibration zero calibration slope calibration slope calibration zero calibration zero calibration slope calibration slope calibration zero calibration zero calibration slope calibration slope calibration zero calibration zero calibration slope calibration slope calibration zero calibration zero calibration slope calibration slope calibration zero calibration zero calibration slope calibration slope calibration Tab 8 DC CURRENT CURRENT AC function nominal value A set limits A 5n 50n 40n 2u 2u 20u 20u lm 3m Tab 9 AC CURRENT Other then recommended frequency can
93. ing function parameters Some measurement functions have additional parameters When measuring the temperature using RTD sensors RO resistance at 0 C can be set when measuring the temperature using TC sensors the temperature of cold junction can be set Original settings are listed below T RTD RO 100 Q T TC RJ 23 C The parameters can be changed as follows Press METER direct control button and select a function then use cursor buttons to select the line which includes the function parameter Enter new value using numeric keyboard e Confirm the value by pressing ENTER e After setting the coefficients use A or v cursor buttons to switch to the previous or next menu option The same can be achieved using the potentiometer after pressing the knob Press EXIT display button the close the range selection menu and to return to the basic display User Manual v41 41 MC 142 Multifunction Calibrator POWERTEK Start of measurement To start a measurement e Press INPUT direct control button in the basic state of the calibrator e INPUT field on the display shows the measured value The measurement is indicated by a green LED above the INPUT button e Press INPUT button again to stop the measurement The LED goes off and the input connectors are disconnected 18 18 2888 12 48 05 00000 U A BB 80888Z Accuracy 8 88582 INPUT 10 0003 mA gig EET OCZ RSE The multimeter does not display uncer
94. ing method of output terminals GND I GND U as set up using the setup menu Information about the uncertainty of the output signal This section displays the maximum error of the main value of the output signal The value is calculated using the main specification listed in the User s Manual and it is displayed in 2 INPUT section This section displays the values measured by the multimeter The section includes following data a b Main value of measured signal This line displays the measured value and the unit of measurement If the input signals exceed the permitted range OVERFLOW is displayed Designation of selected function of the multimeter Symbolic display of selected function of the multimeter V DC mA DC mV DC R 4W Freq T TC T RTD ACAL 3 Display buttons section This line displays the symbolic descriptions which define the meaning of four related display buttons The respective meanings are as follows symbol button function 10 increase set value 10 x decrease set value 10 x Shape selection of signal shape only for U I F functions reversed polarity of output voltage and current only for DC U DC I functions EXIT move up one level only for F P E functions Calib enter the calibration menu SETUP enter the setup menu TC type selection of thermocouple sensor type only for T function RTD type selection of resistance temperature sensor type only for T functi
95. ing set up measurement cannot be initiated Measurement can only be initiated after the menu is left using the INPUT button Function selection e Press METER direct control button and select FUNCTION option from the menu using cursor buttons e Press UP DOWN display buttons or use the potentiometer to select one of the following functions basic DC voltage range VDC 10 V DC current mA DC 20 mA small DC voltage range mV DC up to 2 V four wire resistance measuring range up to 2 kQ frequency up to 15 kHz temperature measurement using thermocouples T TC temperature measurement using resistance temperature sensors T RTD X X X X X X e By selection of the measurement function some related options are automatically changed as well measuring range unit of measurement Press EXIT display button the close the function selection menu and to return to the basic display Setting the measurement range e Press METER direct control button and select RANGE option from the menu using cursor buttons e Press UP DOWN display buttons or use the potentiometer to select the measurement range for selected function Ranges of individual functions can be changed small DC voltages mV DC ranges 20 200 2000 mV temperature measurement using thermocouples T TC types K N R S B J T E temperature measurement using RTD sensors types Pt 1 385 Pt 1 392 e After setting the range use or v cursor buttons to switch to the previous or
96. ion 140 01 is connected to the AUXILIARY connector access to calibration mode is not permitted Calibrator will display message Err 9 Bad cable adapter e Ifan attempt is made to access the calibration procedure within 60 minutes after the calibrator was switched on the calibrator does not open the respective menu and displays the following message instead Err 21 Time warm up xx minutes remain e If the calibrator is already on for at least 60 minutes it requests the entry of the calibration code after CAL MODE display button is pressed CALIBRATION MENU Set calibration code 46686 SELECT do Exit Enter the correct calibration code using numeric keyboard and press ENTER e If incorrect calibration code is entered an error message appears on the display for approximately 3 seconds Err 20 Bad calib code 50 User Manual v41 POWERTEK MC 142 Multifunction Calibrator e fcorrect calibration code is entered calibration menu appears 18 18 2888 13 88 CALIBRATION MENU Voltage JL Voltage AC Current DC Current AC Power DC Power AC Resistance Select 1 T Exit Use and v cursor buttons to move the cursor through the list 1 VOLTAGE DC All DC voltage ranges calibration 2 VOLTAGE AC All AC voltage ranges calibration 3 CURRENT DC AII DC current ranges calibration 4 CURRENT AC AII AC current ranges calibration 5 POWER DC DC power calibration 6 POWER A
97. ion is recommended only after the calibrator reaches the operating temperature Procedure e Use a display button to enter the calibration mode Enter the calibration code and confirm by pressing ENTER Use the cursor buttons or potentiometer to select the AUTOCAL function from the calibration menu After the function is activated only one option OFFSET ACAL is provided Press SELECT display button to confirm the option e The calibration includes two steps During the first step Hi Lo terminals must be shorted Use a short cable to connect the terminals During the second step the calibrator requests the disconnection of Hi Lo terminals Follow the instructions provided on the display when requested to do so short calibrator s Hi Lo terminals Press NEXT display button the calibrator performs internal measurement for ca 30 seconds During this period progress information is displayed in the bottom part of the display after the measurement completes the calibrator requests the disconnection of Hi Lo terminals Disconnect the cable and confirm by pressing NEXT display button the calibrator performs internal measurement of voltage ranges for ca 8 minutes During this period progress information is displayed in the bottom part of the display after the measurement completes the calibrator returns to the calibration mode press EXIT display button to return to normal state Do not connect any terminals during
98. is switched off Setup menu offers the following options 1 Current Coil xx x25 x50 OFF This parameter can be set on when 50 turn current coil is going to be used for clamp ammeter calibration The coil multiplies the output current either 25 times or 50 times depending on set paarmeter OFF is set by the manufacturer 2 GNDU xx ON OFF This parameter connects Lo terminal to GND In practice this means that Lo terminal is grounded By pressing the display buttons the terminal can be grounded or ungrounded ON is set by the manufacturer output terminal is grounded 3 GNDI xx ON OFF This parameter connects I to GND In practice this means that I terminal is grounded By pressing the display buttons the terminal can be grounded or ungrounded OFF is set by the manufacturer output terminals are not grounded It is recommended to ground only the voltage channel GND U ON GND I OFF for all ranges except the generation of power or energy If the meter to be calibrated has Lo terminal grounded it is recommended to unground both outputs of the calibrator GND U OFF GND I OFF to exclude ground loops User Manual v41 45 MC 142 Multifunction Calibrator POWERTEK Note If neither the calibrator s output nor the meter s inputs are grounded signal noise ratio can arise at the calibrator s output 4 Temp scale xx ITS90 PTS68 This parameter allows the temperature scale for platinum resistance temperature
99. lays the numbers entered using the numeric keyboard when the main data are set using the numeric keyboard The information allows the entered information to be checked Minor data There are two lines displaying the minor data of the output signal especially e setrelative deviation from main set value in 96 frequency for DC voltage current power energy functions e set value of current voltage or power factor phase for power energy functions User Manual v41 POWERTEK MC 142 Multifunction Calibrator g e value of RO resistance and the type of resistance temperature sensor e cold junction temperature of TC sensors and the selected type of TC sensor e value of amplitude and shape type for frequency function Information section The information section located in the right part of the display displays additional information related to the selected function e symbol of connected mm or disconnected orr output terminals At the same time a LED located above the OUTPUT button is lit e information about remote local control of the calibrator If the calibrator is controlled remotely REM is displayed If the calibrator is controlled locally using the keyboard LOCAL is displayed e information about the use of 50 tum coil COIL x50 at the current output of the calibrator if this feature is turned on using the SETUP menu information about the type of connected cable adapter if used information about the ground
100. limit Connect Option 40 cable adapter to the auxiliary connector on the front panel Connect Lo banana of the adapter to the Lo output terminal on the calibrator Connect Hi banana of the adapter to the Hi output terminal on the calibrator Set appropriate value of frequency and DC voltage range 20V on the calibrator frequency and 10 V DC range on build in meter according to the table XIII Perform multimeter test in points FREQUENCY 1000Hz and 10 VDCV Deviations should not exceed limits in the tables bellow Note Because accuracy of calibrator output is not accurate enough in all points use external standard counter frequency or multimeter DC voltage connected in parallel to the output terminals to obtain exact value on the output Connect Option 40 cable adapter to the I I output terminals of the calibrator Set appropriate value of output DC current Perform multimeter test on range 25 mA DC i e point 19 mA DC see table of limits according to the table XIII Deviation should not exceed specified limit Connect Option 80 cable adapter to the auxiliary connector on the front panel Set in SETUP MENU of build in meter function DC voltage range 2V Connect together Hu and Lu terminals banana of the adapter to make short and use ZERO function of the meter to reset zero point of the meter Connect terminal Hu of the adapter with output terminal Hi on calibrator Connect terminal Lu of the adapter with output terminal Li on the
101. m changing the calibration of the instrument User Manual v41 47 MC 142 Multifunction Calibrator POWERTEK 18 18 2888 12 56 SETUP MENU Keub volume Brightness Rotary change Switch polarity Off Switch activity Pass Note It is advisable to write down actual calibration code if changed If you forget the calibration code you have to send the calibrator to the manufacturer 19 Cal date xx yyyy Displays the date of last calibration of the calibrator month year The parameter cannot be changed as it is automatically recorded when leaving the calibration mode 20 Serial No xxxxxx Displays the serial number of the calibrator The parameter cannot be changed 21 Time xx yy Displays real time The parameter can be changed using HOUR UP HOUR DO MIN UP MIN DO display buttons 22 Date xx yy zzzz Displays real time The parameter can be changed using DAY UP MONTH UP YEAR UP YEAR DO display buttons 23 Time on display xx ONOFF If set to ON time and date are displayed in the upper part of the display If OFF is set time and date are not displayed ON is set by the manufacturer 48 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Calibration mode The multifunction calibrator includes a calibration procedure which allows calibration of the calibrator Zero point and slope of the characteristics of individual generation and measurement ranges are se
102. n parallel If necessary adjust zero of standard multimeter before calibration Press SELECT display button to select 19 mV calibration point Red LED is lit above OUTPUT button Set such output voltage on the calibrator that standard multimeter indicates 19 000 mV After the value stabilizes press WRITE display button to write new calibration value Terminals of the calibrator will switch OFF automatically Disconnect input wires of Option 80 200 mV voltage range calibration Make short of test wires of Option 80 adapter Press SELECT display button to select the first calibration point of 200 mV range 0 mV After the value stabilizes press WRITE display button to write new calibration value Connect external standard multimeter set to the mVDC function to the Hi Lo output terminals Use test wires from basic delivery Connect HU test wire of cable adapter to the Hi terminal on the calibrator and LU test wire of cable adapter to the Lo terminal on the calibrator Both build in meter and external multimeter are in parallel If necessary adjust zero of standard multimeter before calibration Press SELECT display button to select 190 mV calibration point Red LED is lit above OUTPUT button Set such output voltage on the calibrator that standard multimeter indicates 190 00 mV After the value stabilizes press WRITE display button to write new calibration value Terminals of the calibrator will switch OFF automatically Di
103. nals has some limitations non harmonic voltages can be generated in the 0 1 Hz to 1000 Hz frequency range e non harmonic currents can be generated in the 0 1 Hz to 120 Hz frequency range e generation of these signals is limited to the voltage range up to 200 V and current range up to 2 A e non harmonic signals cannot be generated in the P E power energy mode Control in the non harmonic mode e Select AC voltage or AC current mode The main section of the display shows the following data main data of set current or voltage unit of measurement relative deviation frequency selected SHAPE of the output signal X x Keep pressing SHAPE display button to select the desired shape of the output signal The output terminals are automatically disconnected when changing the shape of the output signal or when changing the relative deviation A if a non zero relative deviation is set Displayed information When non harmonic output shape is selected the display shows additional information besides the main amplitude data pk index is displayed notifying that the displayed main value is the peak value Symbol which displays the shape of the output signal is displayed too e below the main data an information about the shape type Shape xxxxx is displayed User Manual v41 23 MC 142 Multifunction Calibrator POWERTEK e below the main data calculated effective value of the output signal is displayed e f
104. next menu option The same can be achieved using the potentiometer after pressing the knob Press EXIT display button the close the range selection menu and to return to the basic display Units of measurement Unit of measurement can be set for each measurement function The unit of measurement is displayed along with the measured value on the display The description of the unit of measurement can consist of up to 4 characters e Press METER direct control button and select UNIT option from the menu using cursor buttons Press the knob of the potentiometer to display and v symbols above the active character e Press UP DOWN display buttons or use the potentiometer to select desired character at the active position e Press NEXT display button to move onto next character User Manual v41 39 MC 142 Multifunction Calibrator POWERTEK e Press the knob of the potentiometer to complete the setting e After the unit of measurement is selected use A or v cursor buttons to move onto the next menu option The same can be achieved using the potentiometer after pressing the knob Press EXIT display button the close the range selection menu and to return to the basic display 8 6 2886 12 48 SETUP METER Function Type RTD Unit To reset the unit of measurement to original setting press CLR display button Original settings are listed below basic DC voltage range VDC V DC current mA DC 20 mA mA small DC voltages mV DC up
105. nge the value of the active digit e to get to the default screen keep pressing the center cursor button until there is no 1 under any value or press EXIT button All values can be set using the buttons or the potentiometer If a non zero relative deviation is set the main data can be changed as well The value of the output signal is always recalculated If a zero relative deviation is set the minor data section is not displayed Change of value by factor of ten All functions of the calibrator allow the increase of the output value by 10 or reduction of the output value by 10 Such operation is equivalent to the change of internal range only in U I P E modes If the change results in overflow or underflow of calibrator s range an error message appears Value too large if the resulting value is too large Value too small if the resulting value is too small Range change e Press the display button labeled x10 if you want to increase the range 10 to decrease the range The main value shown on the display is increased 10x reduced 10x P E function changes the current not voltage when the range is changed R C function changes the set value 10x The procedure however cannot be used to step the internal resistance capacitance ranges which are not decimal T function also has other than decimal ranges and the change of set value 10x therefore does not correspond to internal range change Internal range c
106. nits The calibrator can be used for calibration and testing of various instruments and regulators which must be fed by precise signal and whose response electrical signal is to be measured Two methods of connection can be used each of them having different function and generation and measurement ranges Simultaneous mode can only be used if Opt 40 60 cable adapter is connected to AUXILIARY terminal When no adapter is connected simultaneous mode cannot be activated 110 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Option 40 60 cable adapter application Cable adapter Option 40 cable supports simultaneous mode measurement of voltage up to 12 V current up to 25 mA and frequency up to 15 kHz Option 60 cable adapter is designed for four wire measurement of resistance or temperature using resistance temperature sensors Option 70 application The adapter is aimed for four wire sourcing of resistance values and for four wire resistance temperature sensor simulation Re calibration of resistance function of the calibrator can be performed only with this adapter Resistance ranges are the same as two wire resistance ranges with output on Hi Lo terminals on front panel When adapter Option 70 is used resistance output is only on output terminals on this adapter Front panel Hi Lo terminals are switched off When adapter Option 70 is used set resistance value is connected to the adapter output terminals permane
107. nties function total range uncertainty resolution range DC voltage DCV 0 to 20 0000 V 0 01 500 uV 100uV 10V DC voltage mVDC 0 to 2 00000 V 0 02 7 uv 20mV 100nV 200mV luV 2V 10uV DC current 0 to 25 0000 mA 0 015 300 nA 100 nA 20mA Frequency 1 000 Hz to 15 000 00kHz 0 005 10 uHz 0 1 Hz Resistance 0 000 to 2 500 00 Q 0 02 10m Q 20 ImQ 200 IMQ 2kQ 10mQ Temperature PT sensor 200 000 to 850 000 C 0 1 C 0 1 C Temperature TC sensor 250 00 to 1820 00 C see Table 0 01 C Uncertainties are valid after performing ZERO correction in set mode Measuring current 1 mA For Pt 1000 sensor maximum temperature is 350 C Maximum measured resistance is 2 KQ Maximum allowed analogue input DC voltage is 2 V Ranges and uncertainties of temperature measuring with TC sensor meeanyte 3 s m uw 400 800 800 1000 1000 1500 1500 1820 J 210 100 100 150 150 700 700 1200 meeanyte 0 e om os 7 200 100 100 0 0 100 100 400 meeanyte os os m 7 250 100 100 280 280 600 600 1000 weanyt _ e m w 200 100 100 480 480 1000 1000 1372 meeanyte os 6a 9 w 7 200 100 100 0 0 580 580 1300 pwewe9mp e es 9 l 9 Sorting function Output GO NG 1 x make 1 x break contacts 50Vpp 100mA Trigge
108. ntly Status of button ON OFF doesn t influence resistance connecting or disconnecting Option 80 application The adapter is designed for mVDC and thermocouple temperature sensors measurement Appropriate mode can be displayed by pushing METER button and selected from list of functions When Option 80 adapter is connected to auxiliary connector only mVDC function with total range from 0 to 2 000 mV or temperature measurement is available When connected external thermocouple to Option 80 temperature of the sensor is directly displayed Type of thermocouple can be set in METER setup Table bellow shows measurement capability of different cable adapters connected to the auxiliary connector function 140 41 140 40 140 60 140 70 140 80 140 90 140 01 Tab 20 overview of cable adapters Note Option 140 70 is applicable only for four wire simulation of resistance Option 140 41 belongs to M 140 model accessory however measurement part of the option can be applied for MC 142 model as well User Manual v41 111 MC 142 Multifunction Calibrator POWERTEK Examples of tests Examples of applications Sourcing simulating Application Pt 100 temperature 10 V 20 mA f Calibration of temperature evaluation units setting of sensor temperature regulators TC temperature sensor 10 V 20 mA f Calibration of temperature evaluation units setting of temperature regulators Frequency 10 V 20 mA Setting calibration of energy meters
109. ode button and selecting PWM mode Frequency amplitude and duty cycle can be set The instrument to be calibrated connects to FREQ connector using BNC banana cable Connection of the frequency output 30 00000 A The calibrator can be used for basic calibration of oscilloscopes The calibrator provides the following functions check of time base up to 20 MHz using squarewave signal The function is activated by pressing F direct mode button and selecting HF mode Frequency can be set check of vertical channel input sensitivity from 1 mV to 10 V in the frequency range up to 10 kHz The function is activated by pressing F direct mode button and selecting PWM mode Frequency amplitude and duty cycle can be set e check of bandwidth using a signal up to 20 MHz with very steep rising edge less than 5 ns Calibration of time period using squarewave signal whose period can be set up to 10 s with selectable duty cycle The function is activated by pressing F direct mode button and selecting PWM mode Frequency can be set The delay of the signal displayed on the oscilloscope s screen is checked The oscilloscope to be calibrated connects to FREQ connector using a coaxial cable Thermometers The calibrator can be used for calibration of transducers used in thermometers and heat meters which use a thermocouple or Pt or Ni sensor The block connected to the sensor is checked as it is disconnected from the transducer and the calibrator s out
110. of frequency The multifunction calibrator can generate several different voltage shapes with exact frequency amplitude and duty cycle The output signal is present at BNC coaxial connector FREQ located at the front panel The signal is not present at any other output terminal There are two frequency generation modes The first mode PWM allows the generation of squarewave output signal with calibrated amplitude frequency and duty cycle Frequency range is up to 10 kHz The second mode HF also provides squarewave output signal with very steep rising edge typically less than 3 ns PWM mode Frequency range 0 1 Hz to 100 kHz Voltage range 1 mV to 10 Vpp Signal shapes squarewave negative PWM NEG symmetrical PWM SYM positive PWM POS HF mode Frequency range 0 1 Hz to 20 MHz Voltage range 5 Vpk pk 0 10 20 30 dB Signal shapes symmetrical squarewave PWM mode can be used to calibrate the input sensitivity of oscilloscopes at frequencies up to 10 kHz HF mode can be used to calibrate the time base of oscilloscopes To switch between the modes keep pressing F direct mode button The display includes the symbols for currently selected mode PWM or HF Control in the frequency mode Press F direct mode button The calibrator switches to PWM mode If HF mode is desired press F button once more The main data on the display is the frequency The display shows the following data set frequency relative d
111. ohol The calibrator should be calibrated in the recommended 12 month intervals A calibration center should perform the calibration What to do in case of failure If an obvious failure occurs during the operation e g the display is not lit the fan is not turning the calibrator must be switched off immediately First check the fuse located in the power cord receptacle Procedure is following e Remove the end of power cord from the mains connector at the rear panel nsert the blade of a flat screwdriver into the opening cut in the mains voltage selector and pry out the fuse holder Remove the fuse Replace it with new fuse of the same rating if the fuse was broken User Manual v41 75 MC 142 Multifunction Calibrator POWERTEK Replace the fuse holder reconnect the power cord and switch on the calibrator If the problem persists contact the manufacturer If an obvious fault is evidenced e g a measurement range or an operating mode is not functional the user cannot correct the fault Contact the manufacturer Hidden faults can cause different symptoms and be caused by different causes Usually they cause instability of some parameter Hidden defects can be caused by unacceptable distortion degraded insulation etc In this case contact the manufacturer Sometimes it seems that the calibrator has hidden defect when the rules for correct operation are not adhered to In this case the fault is caused by the ope
112. ompensate manually influence of cold junction Use of AUTOCAL function To remove the effects of short term drift and thermal dependency of the simulation AUTOCAL function can be used It can only be activated in the calibration mode Procedure is following Use a display button to enter the calibration menu Enter the calibration code and confirm by pressing ENTER Use the cursor buttons or potentiometer to select the AUTOCAL function from the calibration menu After the function is activated only one option OFFSET ACAL is provided Press SELECT display button to confirm the option Proceed according to the instructions provided on the display Automatic calibration takes ca 8 10 minutes and prompts the user to short Hi Lo circuits and then to disconnect them e After the calibration the calibrator remains in the calibration mode Press EXIT display button to return to normal display Do not connect anything to any terminals during the automatic calibration with the exception of the prompt to short the Hi Lo terminals The procedure is described in Calibration mode chapter User Manual v41 37 MC 142 Multifunction Calibrator POWERTEK Multimeter The calibrator includes a built in multimeter which can measure many electrical and non electrical values Besides DC voltage and current it can measure frequency temperature and when external strain gauge sensors is connected even other non electrical values can be meas
113. on f enter the frequency of the signal only for U I function MODE select the unit of measurement only for AC P E function Tab 4 Display buttons description User Manual v41 13 MC 142 Multifunction Calibrator POWERTEK Rear panel The rear panel of the calibrator includes ventilation holes power cord socket with fuse mains voltage selector mains switch IEEE 488 connectors for connection to GPIB bus and type plate with serial number 10 Z 4 3 air inlet forced ventilation air outlet forced ventilation GPIB RS 232 connectors power cord socket with fuse mains voltage selector mains switch type plate MARLWND R 14 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Control of the calibrator Selection of function After the power is switched on and the initial checks complete the calibrator resets to its reference status i e DC voltage output with set value of 10 V and output terminals disconnected Internal multimeter is switched off The status of the calibrator can be changed using the buttons located at the front panel in one of the following ways 1 Change of function by pressing one of direct function buttons After pressing one of the U I DC AC R C P E F T METER buttons the calibrator switches to the desired function mode and resets to the reference or to the most recently used parameter setting 2 Connection disconnection of output terminals After pr
114. ontrol XON XOFF can be set to control the transfer of the data through the bus RS 232 connector layout 4 5 Pin Label Direction Note 00000 2 TXD output transmitter 0000 5 g 3 RXD input receiver 5 GND ground 9 pin connector D SUB FEMALE Cable between the calibrator and PC configuration 1 1 D Sub 1 D Sub 2 MC 142 Receive Tab 17 RS232 connector description 86 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Command syntax The commands described in this chapter can be issued through both buses GPIB and RS232 All commands listed in this chapter are explained in two columns KEYWORD and PARAMETERS KEYWORD column includes the name of the command Each command includes one or more keywords If a keyword is in brackets it is not mandatory Non mandatory commands are used only to achieve compatibility with language standard SCPI Capitals designate the abbreviated form of the commands extended form is written in lowercase Command parameters are in brackets lt gt each parameter is separated using a comma Parameters in brackets are not mandatory Line means or and is used to separate several alternative parameters Semicolon is used to separate more commands written on one line E g VOLT 2 5 OUTP ON Note Each command must end in lt cr gt or lt If gt Both codes lt crlf gt can be used at the same time The calibrator
115. or A Device specific Error is any executed device operation that did not properly complete due to some condition such as overload QYE Query Error bit 2 This event bit indicates that either 1 an attempt is being made to read data from the Output Queue when no output is either present or pending 2 or data in the Output Queue has been lost OPC Operation Complete bit 0 This event bit is generated in response to the OPC command It indicates that the device has completed all selected pending operations 102 User Manual v41 POWERTEK MC 142 Multifunction Calibrator ESE Event Status Enable Register The Event Status Enable Register allows one or more events in the Event Status Register to be reflected in the ESB summary message bit This register is defined for 8 bits each corresponding to the bits in the Event Status Register The Event Status Enable Register is read with the common query ESE Data is returned as a binary weighted value The Event Status Enable Register is written to by the common command ESE Sending the ESE common command followed by a zero clears the ESE The Event Status Enable Register is cleared upon power on Output Queue The Output Queue stores response messages until they are read The availability of output is summarized by the MAV message available summary message The MAV summary message is used to synchronize information exchange with the controller The Output Queue shall be a first in first
116. or is guaranteed when full calibration was done DC voltage calibration is performed by setting the zero and slope of the scale in all ranges and in both signal polarities and except the 1000 V range where zero correction is not necessary AC voltage calibration is performed by setting the zero and slope of the scale in all ranges at 1000 Hz except the 1000 V range where the calibration is performed at 500 Hz DC current calibration is performed by setting the zero and slope of the scale in all ranges and in both signal polarities and AC current calibration is performed by setting the zero and slope of the scale in all ranges at 1000 Hz except the 20 A where the calibration is performed at 120 Hz AC and DC power calibration is performed by calibration of DC and AC current The phase relationship of voltage and current power factor is defined digitally and cannot be calibrated It can only be checked The respective check is not included in the calibration procedure Resistance calibration is performed by setting the zero and slope of the scale in all ranges Slope of each range is calibrated twice In practice 9 internal range resistances 50 to 100 MQ must be measured and the measured value entered into the calibrator then the zero point of the scale is adjusted for each range Calibration of resistance ranges must be performed through AUXILIARY connector Cable adapter Option 70 must be connected to the auxiliary
117. orsquarewave signals set value of duty cycle PWM xx is displayed IT FLT 16 16 2E86 12 23 OFFI Local Gndu 030 0000 Up A Ha Hebe f BBE HA Hz PUM 532 Shape PLM POS Ue 015 0000 U Rccur acy A 384 ITNPLT i u DC l xia 18 Shape f Setup Simulation of resistance and capacitance The multifunction calibrator can simulate an exact value of resistance or capacitance The outputs of the simulator are connected to Hi Lo terminals and to AUXILIARY connector pins 20 21 22 23 4W resistance is accessible only via cable adapter Opt 70 Only two wire connection is available on the front panel terminals Hi Lo Both two wire and four wire connection is possible only through AUXILIARY connector The terminals SIMHI SIMLI are current terminals and SIMHU SIMLU are voltage sensing terminals Cable adapter Option 70 must be used for four wire connection Type of cable adapter currently connected to the AUXILIARY connector is displayed on the display If Option 70 is connected label CA 140 70 is displayed in the right side Cable adapter Option 70 can be used for four wire connecting of simulated resistance only In compare with direct two wire connection through output terminals Hi Lo accuracy of resistance is better with Option 70 see Technical data When Cable adapter Option 70 is connected to the AUXILIARY connector only resistance mode and resistance temperature simulation mode can be c
118. output in the calibration points d To adjust the calibrator s output in the calibration points press SELECT button and use lt gt v A cursor buttons or potentiometer to adjust the output current Confirm correctly set value by pressing WRITE display button If you want to skip the calibration point whose calibration you have already entered press SKIP display button e Resistance shunt should be used on 2A 30 A ranges if standard multimeter does not cover this range 7 AC current ranges calibration a Select CURRENT AC from the calibration menu Set the same function on external multimeter b Follow the instructions provided on the calibrator s display and the ACI table to adjust the calibrator s output in the calibration points c To adjust the calibrator s output in the calibration points press SELECT button and use lt gt v A cursor buttons or potentiometer to adjust the output current Confirm correctly set value by pressing WRITE display button If you want to skip the calibration point whose calibration you have already entered press SKIP display button d Resistance shunt should be used on 2A 30 A ranges if standard multimeter does not cover this range 8 DC power ranges calibration a DC power ranges calibration is performed by calibrating 20 mA 200 mA 2 A 20 A DC current ranges There is no need to calibrate voltage ranges b Select POWER DC from the calibration menu c Connect a standard ammeter to calib
119. ower factor Time setting range is 1 1 s to 1999 s 18 18 2888 12 48 1 150000 k PF 1 888 38 888 Hz U 238 8888 U 85 888868 A 68 8 s B53 B8888kls bitte bitte 172 Setup The energy value can be set in two ways User Manual v41 29 MC 142 Multifunction Calibrator POWERTEK Direct setting of energy e Select the energy mode and then keep pressing the center cursor button until appear under the time value E xxx xxxx supplemented with indication of the set mode symbols e The value can be set using numeric keyboard cursor buttons or potentiometer and confirmed by pressing Ws kWs MWs VAs kVAS MVAs or VArs kVArs MVArs display buttons depending on the set mode The value can also be confirmed by pressing ENTER Time value is recalculated using new set energy Setting the time e Select the energy mode and then keep pressing the center cursor button until appear under the time value t xxx x s symbols 18 18 2888 12 41 1 150000 k PF 1 000 38 888 Hz 230 0000 U 85 888868 A B63 8888klls Eru Eru 17 Exit The value can be set using numeric keyboard cursor buttons or potentiometer and confirmed by pressing s display button depending on the set mode The value can also be confirmed by pressing ENTER Energy value is recalculated using new set time Grounding of the calibrator and the instrument to be calibrated in the P E mode When c
120. phase shift between the output voltage and current At the same time the power generation mode is set lt DNPD gt Represents the phase shift between the output voltage and current in degrees DEG setting or specified as a value of the power factor COS setting Technical Data chapter lists the acceptable ranges LEAD LAG This parameter is entered only when specifying the value of the power factor If the value is omitted LAG is used If query is sent MC142 returns the set value of the phase shift between the output voltage and current using standard exponential format Example 156 3 is returned as 1 563000e 002 Example POWE PHAS 250 2 lt cr gt activates the power generation mode and sets 250 2 phase shift between the output voltage and current POWE PHAS lt cr gt the calibrator returns 2 502000e 002 Example POWE PHAS 0 554 LAG lt cr gt activates the power generation mode and sets 0 554 LAG power factor POWE PHAS lt cr gt the calibrator returns 5 540000e 001 LAG SOUR POWE VOLT LEVE IMM AMPL lt DNPD gt This command sets the amplitude of the voltage for power generation At the same time the power generation mode is set lt DNPD gt Represents the voltage expressed in Volts used to generate the power Technical Data chapter lists the acceptable ranges If query is sent MC142 returns the set value of the voltage using standard exponential format Example 100 3V
121. press button again The polarity of the relative deviation can be reversed using the cursor buttons or the potentiometer as well Setting relative deviation using cursor keys e keep pressing the center cursor button until symbols appear under the relative deviation value e press lt gt or v button The display now includes cursor marks which point to the active digit e a and v buttons can be used to change the active digit lt gt buttons can be used to change the position of the cursor marks e to get to the default screen keep pressing the center cursor button until there is no under any value or press EXIT button All values can be set using the buttons or the potentiometer User Manual v41 17 MC 142 Multifunction Calibrator POWERTEK Setting relative deviation using potentiometer e keep pressing the center cursor button until deviation value in the minor data section of the display symbols appear under the relative press the potentiometer knob The display now includes cursor marks which point to the active digit Turn the knob to change the value of the active digit press the potentiometer knob to change to the mode which allows to change the position of the active digit and symbols are displayed above the active digit The position of the active digit can be changed by turning the knob e turn the knob to change back to the mode which allows to cha
122. put is connected to the transducer s input instead Simulation of thermal sensor is activated by pressing T direct mode button Pt and Ni resistance temperature sensors as well as K N R S B J T E thermocouples can be simulated The calibrator can be connected to transducer s input in one of the following ways e without the cable adapter directly to Hi Lo terminals Temperature of cold junction must be compensated by manual setting of RJ value The connection is similar to voltmeter connection with cable adapter Option 140 01 to the terminals Hi Lo Automatic compensation of TC sensors cold junction can be used here The cable adapter is equipped with build in Pt1000 temperature which measures ambient temperature After build in meter switching on button INPUT ON and with cable adapter 140 01 connected automatic compensation of TC cold junction temperature is performed When meter is 108 User Manual v41 POWERTEK MC 142 Multifunction Calibrator deactivated INPUT OFF cold junction temperature RJ can be set manually only Connection of device under test is similar to the voltmeter connection using 140 01 cable adapter and OUTPUT terminals Temperature of cold junction must be comnensated by manual setting of RJ value Pt100 Measurement Thanks to built in multimeter the calibrator can be used for basic calibration of some sources of electrical signals The table lists the type of adapter which is necessary for a part
123. r mode can be used to calibrate DC and AC single phase powermeters and energy meters Voltage range is up to 240 V and current range is up to 20 A power factor range is 1 to 1 and the resolution is 1 in the 40 Hz to 400 Hz frequency range The voltage output can supply loads up to 30 mA which allows the calibration of mechanical powermeters Simulation of temperature sensors is yet another feature which can be used to calibrate thermometers and heat sensing units The calibrator allows the simulation of all common Pt and Ni resistance sensors and R S B J T E K N type thermocouples Compensation of cold junction of thermocouple is achieved by entering the respective temperature using the calibrator s keyboard The accuracy of simulated temperature sensors depends on the value and type of sensor and ranges from 0 04 C to 0 5 C for resistance sensors and from 0 4 C to 4 3 C for thermocouples Internal multimeter with 20 mA 20 mV 200 mV and 10 V basic ranges and 0 01 accuracy can be used to measure normalized signals coming from transducers external thermocouples or resistance sensors or to measure pressure and force using strain gauge sensors The calibrator includes many other features which facilitate easy use For example relative deviation from set value of the output currently displayed uncertainty of the output signal calibration and testing procedures etc The concept of calibrator control and indication of its status i
124. ration Calibration of resistance ranges can be performed with adapter without cable adapter Option 70 Calibration of internal multimeter can be performed with cable adapters Option 40 and Option 60 Internal RxD Internal error Internal error of the calibrator Turn the calibrator off and after 5 timeout s turn on If the error will appear again contact manufacturer Internal Internal error Internal error of the calibrator Turn the calibrator off and after 5 communication s turn on If the error will appear again contact manufacturer Calibrator is not Internal error Internal error of the calibrator Turn the calibrator off and after 5 ready s turn on If the error will appear again contact manufacturer Value too large Maximum value is out of Attempt to set value over possible range Set correct value limit Value too small Minimum value is out of Attempt to set value under possible range Set correct value limit Deviation too large Deviation is too high Set deviation is out of limit 30 to 30 Set correct value Unable Change of polarity is not Attempt to change polarity where it is not allowed Concerned allowed modes F P E R C ACV ACI Unable polarity Negative polarity is not Attempt to set negative polarity where it is not allowed allowed Concerned modes F P E R C ACV ACI Unable DC AC DC AC conversion is not Attempt to change parameter AC DC where it is nonsense or possible
125. rator s output terminals I I d 60 ATTENTION Calibrator s Lo and I terminals are electrically connected Follow the instructions provided on the calibrator s display and the POWER DC table to adjust the calibrator s output in the calibration points User Manual v41 POWERTEK MC 142 Multifunction Calibrator e To adjust the calibrator s output in the calibration points press SELECT button and use lt gt v A cursor buttons or potentiometer to adjust the output voltage Confirm correctly set value by pressing WRITE display button f Shunt should be used on 2A 10 A ranges 9 AC power ranges calibration a DC power ranges calibration is performed by calibrating 20 mA 200 mA 2 A 20 A AC current ranges There is no need to calibrate the voltage ranges b Select POWER DC from the calibration menu c Connect a standard ammeter to calibrator s output terminals I I d Follow the instructions provided on the calibrator s display and the POWER AC table to adjust the calibrator s output in the calibration points e To adjust the calibrator s output in the calibration points press SELECT button and use lt gt v A cursor buttons or potentiometer to adjust the output voltage Confirm correctly set value by pressing WRITE display button f Shunt should be used in 2A 20 A ranges 10 Resistance ranges calibration Resistance ranges calibration is performed by both calibration methods i e
126. rator Most frequent cases of false hidden defects mains voltage out of tolerance limits or unstable wrong grounding of the measurement circuit bad connection of the ground terminal of the mains outlet or several ground connection when grounding loops are formed proximity to sources of intensive influence whose products are spread through the mains or propagated by the electromagnetic field strong electrostatic or electromagnetic field which can cause major instability during calibration using higher impedance 76 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Verification test Procedure recommended for verifying parameters of the calibrator is described in this chapter During tests it is not necessary access to the interior of the instrument Required equipment Following instruments are required for performance verification test e 81 2 digit multimeter type HP3458A or Fluke 8508A or other type with accuracy 0 001 on DC voltage e resistance shunt 10 mQ 100 mQ Burster 1280 or other type with accuracy 0 01 e RLC meter BM 595 HP 4263A HP4278A ESI 2150 or other with accuracy 0 1 96 e counter HP 53181A HO 53130 BM 642 or other with accuracy 0 001 powermeter 0 02 0 05 like Zimmer LMG95 Yokogawa resistance standard 100 Ohm 1000 Ohm with accuracy 0 005 HP8903A Distortion analyzer and scope with bandwidth min 20 MHz are recommended for THD measuring of AC signals Configura
127. rator can generate exact value of electric power and energy P E function provides output voltage at Hi Lo terminals and output current at I I terminals Lo and I terminals are electrically connected Power setting range 0 0 VA to 2400 VA Voltage setting range 0 2 V to 240 V Current setting range 0 01 A to 20 A limited time in range 10 to 20 A Power factor setting range to 1 phase 90 to 90 Frequency setting range DC 40 Hz to 400 Hz Control in power generation mode Press P E button on the calibrator and then select AC or DC mode by pressing DC AC button The display shows set power value e The display shows the following data main value of set power in selected unit of measurement VA W VAr power factor value PF in negative polarity LA or positive polarity LE or the phase shift between the voltage and current in frequency if AC power is selected voltage at Hi Lo terminals current through I I terminals uncertainty of set power remaining time of output current ON state when current is set in range 10 to 20 A Set desired value of power using numeric keyboard potentiometer or cursor buttons Output power is not yet connected to the output terminals The information section of the display shows the symbol forr which informs about the disconnection of output terminals X X X e Connect the instrument to be calibrated to Hi Lo and I I terminals or s
128. requency when AC current is generated total value of output current when non zero absolute or relative deviation is set time after which the output terminals will be disconnected when the output current over 10 A is selected X X X X X Set the desired value of voltage including polarity when necessary frequency and relative deviation The signal is yet not connected to the output terminals The information section of the display shows the symbol which informs about the disconnection of output terminals OFF Connect the load or short the output terminals labeled 1 I Press OUTPUT button Red LED is lit above the OUTPUT terminals to signal the connection of the signal to the output terminals the information section of the display shows the symbol mm Calibrated current corresponding to set parameters is driven by the output terminals e If COIL x 50 or COIL x 25 function is activated see below Setup functions menu the optional 50 turn coil must be connected to output terminals The calibrator can be used to calibrate 25 uA to 500 A or 50 uA to 1000 A ammeters The calibrator generates AC and DC current within the range up to 20 A with current coil CAUTION If GND terminal is connected to Lo I terminals it is prohibited to connect external load to GND Hi or GND I terminals Such connection can damage the calibrator 22 User Manual v41 POWERTEK MC 142 Multifunction Calibr
129. resistance in Ohms Technical Data chapter lists the acceptable ranges If query is sent MC142 returns the set value of resistance using standard exponential format Example 20 5Q is returned as 2 050000e 001 SOUR CAP LEVE IMM AMPL lt DNPD gt This command activates the generation of a capacitance lt DNPD gt Represents the value of the capacitance in Ohms Technical Data chapter lists the acceptable ranges If query is sent MC142 returns the set value of capacitance using standard exponential format Example 20 5nF is returned as 2 050000e 008 SOUR POWE PHAS UNIT lt CPD gt DEG COS This command sets the method used to specify the phase shift between the output voltage and current DEG activates a mode where all entries are done using the angle in the range of 0 0 360 0 COS activates a mode where all entries are done using the power factor in the range of 1 000 to 1 000 LAG or LEAD LAG 0 180 LEAD 180 360 The unit of measurement remains valid even after the calibrator is switched off and back on If query is sent MC142 returns the set unit of measurement DEG COS j 90 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Example PHAS UNIT DEG lt cr gt sets the angle as the unit of measurement PHAS UNIT lt cr gt the calibrator returns DEG SOUR POWE PHAS lt DNPD gt LEAD LAG This command sets the
130. ries until all previous remote commands have been executed Reset RST lt cr gt This command resets the calibrator to its initial status Test operation TST lt cr gt This command executes an internal self test Return the self test result 0 for pass or 1 for fail Status byte reading IEEE488 only STB lt cr gt This query returns the Status Byte Register including the MSS bit Service Request Enable setting IEEE488 only SRE lt value gt lt cr gt This command sets condition of the Service Request Enable register Since bit 6 is not used the maximum entry is 191 98 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Service Request Enable reading IEEE488 only SRE cr This query returns the Service Request Enable Register Event Status Register reading IEEE488 only ESR cr This query returns the contents of the Event Status Register and clears the register Event Status Enable setting IEEE488 only ESE value cr This command programs the Event Status Enable register bits If one or more of the enabled events of the Event Status Enable register is set the ESB of Status Byte Register is set too Event Status Enable reading IEEE488 only ESE cr This query returns the Event Status Enable register Clear status IEEE488 only CLS cr This command clears the Event Status Register and the Status Byte Register except the MAV bit and output q
131. ring external internal manual User Manual v41 119 MC 142 Multifunction Calibrator POWERTEK General data Warm up time Specification interval Specification confidence level Range of working temperatures Temperature coefficient Reference temperature Relative humidity Storage temperature Altitude Electrostatic Discharge Dimension Netto weight Power line Power consumption Safety class Used external fuses Used internal fuses Accessories 60 minutes 1 year 99 23 10 C humidity lt 80 Temperature coefficient for temperature outside of Tcal 2 C between 13 C to 33 C is 0 1 x C 2342 C lt 70 to 28 C 10 to 55 C 3 000 m operating 12 000 m storage This instrument meets class I for ESD requirements per EN 61326 450 x 480 x 150 mm 23 kg 115 220 230 V 50 60 Hz 45 VA without load max 400 VA with full load I according IEC 1010 1 F4L250V AC line input F1 6L250V 3 pcs F200mL250V 2 pcs F2 5L250V 2 pcs Basic accessories included in delivery e Power line cord 1 pe e User s manual l pc e Testreport 1 pe e Spare fuse 2 pe e Test cable 1000V 30A 1m 2 pe e Option 40 Input cable adapter D SUB25 2xbannana for VDC mADC measurement l pc e Option 60 Input cable adapter D SUB25 4xbannana for 4W resistance RTD temperature measurement 1 pe Option 70 Output cable adapter D SUB25 4xbannana 4W resistance source 1 pc Option 80 Input cable adap
132. rminals 20 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Control sequence when output voltage over 100 V is selected When output voltage over 100 V is selected the information section of the display shows the symbol F4 which informs that a life threatening voltage will be present at the output terminals If the output terminals are currently connected they will be disconnected when output voltage over 100 V is selected OUTPUT button must be pressed to reconnect the output signal to the output terminals After the OUTPUT button is pressed an interrupted beep is sound OUTPUT LED is lit and the information section of the display shows the symbol notifying the user about the connection of the dangerous output signal to the output terminals Voltage polarity frequency absolute and relative deviation can be set without the outputs being disconnected The output terminals are automatically disconnected when changing between AC and DC ranges or when changing the function mode Using AUTOCAL function To remove the effect of short term drift and temperature dependency of small DC voltages AUTOCAL function can be used It can only be activated in the calibration mode Calibration mode lists the respective procedure Overloading of terminals If the output terminals are overloaded or short circuited in the voltage mode the calibrator disconnects the signal from the output terminals and reports Overload U output error
133. s Feedback circuits sense the voltage present at the output terminals normalize its value and detects it This results in a signal corresponding to average value of the output voltage This signal is further filtered and compared to the set value of output voltage The error value controls the amplitude of the generator s output 20mV and 200 mV voltage ranges 20 mV and 200 mV voltage ranges are derived from 2 and 20 V voltage ranges DA convertor 204 amplifier The output of the amplifier is fed to an inverting attentuator with 1 100 nominal division ratio The signal is then led to the output terminals sensed via local feedback This connection allows to load the calibrator output with output current of several mA without losing accuracy 1000 V AC DC voltage range The highest voltage range of the calibrator uses 200 V amplifier It is connected to a pair of transformers with ca 1 6 transformation ratio DA convertor Error amplifier Feedback amplifier Generator 20V amplifier In 1000 V AC mode the output of 200 V amplifier is transformed and led to the output terminals The output voltage is sensed rectified and compared to reference DC voltage provided by the DA converter error value controls the amplitude of the generator s output so that there is correct voltage at the output terminals In 1000 V DC mode 12 kHz signal is transformed rectified filtered and led to the output terminals The output voltage is
134. s based on flat luminiscent display which provides all necessary information The calibrator is controlled by opening menus on the display and selection from menus Frequently used functions are assigned direct control keys The calibrator comes with standard GPIB bus and RS 232 serial line which allow the calibrator to be controlled from a PC The calibrator can easily fit within calibration systems featuring WinQbase CALIBER software support ATTENTION The calibrator generates life threatening high voltage The calibrator can only be used in line with this manual User Manual v41 5 MC 142 Multifunction Calibrator POWERTEK Preparation for operation Inspecting package contents selecting the installation location Basic package includes the following items e Multifunction calibrator e Power cord e Spare fuse TAL250 T T8L250 T e Operation manual e Testreport e Test cable 1000V 20 A 2 pcs e Cable adapter Option 40 Cable adapter Option 60 e Cable adapter Option 70 e Cable adapter Option 80 e RS 232 cable The calibrator should be powered by 230 115 V 50 60 Hz mains It is a laboratory instrument whose parameters are guaranteed at 23 2 C Before powering on the instruments place it on a level surface Do not cover the vents at the bottom side and the fan opening at the rear panel Leave the calibrator to stabilize to ambient temperature and humidity at minimum 4 hours after unpacking If you need
135. s of RTD sensor simulation type range 200 250 C range 250 850 C xm wx I Valid in range 60 to 180 C Uncertainties in the table are maximal uncertainties of RTD sensor simulation Actual uncertainty for each set value of simulated temperature is determined by uncertainty of relevant resistance Actual temperature uncertainty is displayed on the calibrator display Actual uncertainties are always lower than those in above table B TC sensors types K N R S B J T E temperature range 250 to 1820 C according to the type temperature uncertainty 0 4 to 4 3 C see table bellow resolution 0 1 Ranges and uncertainties of TC sensor simulation lol wera 400500 800 1000 1000 1500 1500 1820 210 100 100 150 150 700 700 1200 200 100 100 0 0 100 100 400 250 100 100 280 280 600 600 1000 200 100 100 480 480 1000 1000 1372 200 100 100 0 0 580 580 1300 Uncertainties in the table show range of the uncertainties of TC sensor simulation in specified range Actual uncertainty for each set value of simulated temperature is determined by uncertainty of relevant DC voltage Actual temperature uncertainty is displayed on the calibrator display 118 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Multimeter Functions DC voltage DC current resistance temperature Ranges and uncertai
136. sconnect input wires of Option 80 2000 mV voltage range calibration Make short of test wires of Option 80 adapter Press SELECT display button to select the first calibration point of 2000 mV range 0 mV After the value stabilizes press WRITE display button to write new calibration value Connect external standard multimeter set to the mVDC function to the Hi Lo output terminals Use test wires from basic delivery Connect HU test wire of cable adapter to the Hi terminal on the calibrator and LU test wire of cable adapter to the Lo terminal on the calibrator Both build in meter and external multimeter are in parallel If necessary adjust zero of standard multimeter before calibration Press SELECT display button to select 1900 mV calibration point Red LED is lit above OUTPUT button Set such output voltage on the calibrator that standard multimeter indicates 1900 0 mV After the value stabilizes press WRITE display button to write new calibration value Terminals of the calibrator will switch OFF automatically 65 MC 142 Multifunction Calibrator POWERTEK e Disconnect input wires of Option 80 i Exit the calibration mode AUTOCAL function To remove the effects of short term drift and thermal dependency of the simulation AUTOCAL function can be used It can only be activated in the calibration mode Use of AUTOCAL function influences the zero value of DC voltage generated by the calibrator Use of the funct
137. see if the MC142 is the source of an SRQ MSS Master Summary Status bit 6 The MSS bit is set to 1 whenever bits ESB or MAV are 1 and enabled 1 in the SRE This bit can be read using the STB command in serial remote control in place of doing a serial poll ESB Event Summary Bit bit 5 The ESB bit is set to 1 when one or more enabled ESR bits are set to 1 Conversely the ESB bit is set to 0 when no enabled ESR bits are set to 1 MAV Message Available bit 4 The MAV bit is set to 1 whenever data is available in the MC142 IEEE488 Output Queue This message is used to synchronize information exchange with the controller The controller can for example send a query command to the MC142 and then wait for MAV to become TRUE The IEC 625 1 bus is available for other use while an application program is waiting for a device to respond If an application program begins a read operation of the Output Queue without first checking for MAV all system bus activity is held up until the MC142 responds SRE Service Request Enable Register The Service Request Enable Register is an 8 bit register that enables corresponding summary messages in the Status Byte Register Thus the application programmer can select reason for a device MC142 to issue a service request by altering the contents of the SRE The Service Request Enable Register is read with the SRE common query The response message to this query represents the sum of the binary weighted values of th
138. sensed equally to 1000 V AC mode amplifier 72 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Current converter The current converter and current amplifier form a separate design block based on a transconductivity converter with 10 S nominal conversion ratio 10R _SI ts input is fitted with e and current in 2 and input LE U1 R U R6 R5 R4 R3 R2 R1 I rcc aa vg o 2 power stage Hi D U2 Lo DA t t O gt convertor power stage U1 V Lo oO sLo sHi Hi and Lo are calibrator s output terminals The stage including U1 operating amplifier converts voltage to current U2 is a separation amplifier R1 to RS and C1 to C3 are range impedance DA converter has 0 to 1 and 0 to 1 conversion ration and allows the simulation of resistance and capacitance values different from the range impedances The output stage increases the permitted current load of the output ATTENTION The simulator s output voltage Hi Lo terminals is limited to 8 Vpk Frequency synthesizer User Manual v41 73 MC 142 Multifunction Calibrator POWERTEK Frequency synthesis circuitry allows fine setting of frequency in the whole calibrator s range Frequency synthesis uses DSP circuits with basic frequency 20 MHz Power and energy mode In the power energy mode the calibrator supplies the set voltage to
139. sensors to be selected Pressing the display buttons allows to switch between ITS90 and PTS68 temperature scales ITS90 is set by the manufacturer 5 Temp unit xx C K This parameter allows the temperature unit for simulation of temperature sensors to be selected Pressing the display buttons allows to switch between C and K C is set by the manufacturer 6 Phase unit xx cos This parameter allows the unit of phase shift between the voltage and current output to be selected in the power energy generation mode Pressing the display buttons allows to switch between and COS degrees and power factor 7 Meter average xx UP DOWN Displays the number of measurements taken before the average value of build in multimeter is displayed integration constant UP DOWN display buttons can be used to select a value in the range of 1 to 20 The higher the value the longer the calibrator needs to measure a value but displayed value is more stable If 20 is set one measurement takes approximately 2 5 s 8 Interface xx GPIB RS232 Displays the type of interface used to control the calibrator from a PC By pressing GPIB or RS232 buttons the respective type can be selected The calibrator can be remotely controlled only using the selected interface 9 GPIB address xx UP DOWN Displays the calibrator s address at the GPIB bus UP DOWN display buttons can be used to select any valid GBIP address in the range of 00 to
140. strument to be calibrated the following situations can occur Device under test GND U GND I U input floating ON ON I input floating U and I inputs galvanically disconnected not grounded U input floating ON OFF I input floating galvanically connected terminals L OFF ON both U and I inputs not grounded voltage input grounded OFF ON current input floating voltage input floating ON OFF current input grounded both voltage and current inputs OFF OFF grounded Tab 18 Recommended way of signal terminal grounding ATTENTION The voltage between calibrator s I and Lo outputs must not exceed 10 V User Manual v41 107 MC 142 Multifunction Calibrator POWERTEK Counters and oscilloscopes The calibrator can be used for basic calibration of the frequency ranges of multimeters and simple counters The calibrator provides the following functions calibration of frequency functions up to 20 MHz using squarewave signal The function is activated by pressing F direct mode button and selecting HF mode Frequency can be set check of input sensitivity from 1 mV to 10 V in the frequency range up to 100 kHz The function is activated by pressing F direct mode button and selecting PWM mode Frequency amplitude and duty cycle can be set e calibration of time period using squarewave signal whose period can be set up to 10 s with selectable duty cycle The function is activated by pressing F direct m
141. t during the calibration in predefined order The calibration can only be controlled using the buttons and menu on the calibrator The calibration mode includes AUTOCAL autocalibration function This function can automatically correct the short term instability of zero point for voltage ranges up to 20 V This function is not a part of the complete calibration procedure but it can be used to reduce the time and temperature dependent drift of zero point when calibrating using small DC voltages and when simulating the thermocouples Calibration principles The calibrator can be calibrated e completely i e all functions are calibrated in all recommended points partially i e only selected functions are calibrated in all recommended points partially i e only selected functions are calibrated in selected points Complete calibration consists of all partial calibrations performed in the order defined by the calibration menu If an item of the calibration menu e g VOLTAGE DC is selected it is not necessary to calibrate all ranges defined by the calibration algorithm If new calibration of all ranges is not possible e g the required standard is not available old calibration data can be confirmed i e current step of the calibration can be skipped Calibration interruption can be performed in any point of the calibration procedure However this particular calibration influences parameters of the calibrator Accuracy of the calibrat
142. tainty of measuring If the input range is exceeded OVERFLOW message is displayed Zero function The multimeter has a zeroing function It can be activated after the measurement was activated by pressing INPUT direct control button Zeroing is performed by pressing METER direct control button After the button is pressed most recent value is stored and subtracted from all ongoing measured values A Zero message appears on the right side of the display indicating that this function is active Press METER a second time to deactivate the Zeroing function Multimeter s menu can be entered only after the measurement is terminated by pressing INPUT button 42 User Manual v41 POWERTEK MC 142 Multifunction Calibrator 18 18 2888 12 48 UFF 05 00000 U dh BB 8888z INPUT Q 0002 mA Zeroing function can be used e g to compensate the voltage drops at the cables to suppress any remanent value of the signal etc Overloading can damage the multimeter The multimeter can be used as a DC milivoltmeter with 20 mV 200 mV 2 V 10 V ranges The appropriate input terminals are PTHU and PTLU Maximum allowed voltage on the input terminals against ground terminal is 20 V Frequency measurement is possible up to 15 kHz Input signal must be within 0 2 to 5 V range Square wave or pulse shape of the input signal is expected User Manual v41 43 MC 142 Multifunction Calibrator POWERTEK Simultaneous
143. ted in the mains connector at the rear panel Replace the fuse as follows e Switch off the calibrator Remove the end of power cord from the mains connector at the rear panel e Insert the blade of a flat screwdriver into the opening cut in the mains voltage selector and pull out the fuse holder Remove the fuse and replace it with new fuse of the same rating Storing The calibrator can be stored in original packing under storing conditions specified in chapter Specification Safety precautions The instrument has been designed in Safety Class I according to EN 61010 1 The design reflects the requirements of A2 amendment of the standard Safety 1s ensured by the design and by the use of specific component types The manufacturer is not liable for the damage caused by modification of the construction or replacement of parts with non original ones Safety symbols used on the equipment Warning reference to the documentation Warning risk of electric shock Danger high voltage User Manual v41 7 MC 142 Multifunction Calibrator POWERTEK Description of controls Front panel The front panel of the calibrator includes a flat luminiscent display control buttons and output terminals The following picture shows the control part of the front panel 3 5 DUTPUT 1 30 00000 A 1000 00 H 1 Display buttons There are five buttons below the display whose meaning changes depending on the contents of
144. ter D SUB25 2xbannana for mVDC TC temperature measurement l pe e Cable RS232 1 pc Options extra ordered 140 50 Current coil 50 turn e 140 01 Cable adapter for calibration of multimeters with built in temperature sensor e Option 10 Test lead 30A 1000V black e Option 11 Test lead 30A 1000V red Option 20 Coaxial test lead BNC BNC e Option 30 Coaxial test lead BNC bannana e Option 40 Input cable adapter D SUB25 2xbannana for VDC mADC measurement e Option 60 Input cable adapter D SUB25 4xbannana for 4W resistance RTD temperature measurement e Option 70 Output cable adapter D SUB25 4xbannana 4W resistance source e Option 80 Input cable adapter D SUB25 2xbannana for mVDC TC temperature measurement e Option 90 PT100 external temperature sensor e Option 142 02 Test lead test adapter set Opt 10 11 20 30 90 140 01 e Cable GPIB TEEE488 IEEE488 2m e Cable RS232 Cable RS 232 for connecting to PC WinQbase SW for calibration of instrument e Caliber Program module for multimeters 120 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Manufacturer and service For Uk 8 European sales support service and deliveries Powertek UK 19 Cornwallis Road Bilton Rugby CV22 7HL United Kingdom New Tel 01788 519911 Fax 0870 0940135 Int l Tel 44 1788 519911 Int l Fax 44 870 0940135 Email info powertekuk com www powertekuk com For USA sales support service and deliveries Powertek US Inc 7 Third Street Holbrook
145. the calibration procedure with the exception of requested short of Hi Lo terminals 66 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Error messages If an error occurs during the calibrator s operation or control error message is displayed on the display Errors can be caused by incorrect control using the front panel i e attempts to force a prohibited mode e g setting an out of range value overloading of output terminals etc e fault of the calibrator e g internal communication error during the communication between individual functional blocks incorrect control using the GPIB or RS 232 bus Below you can see a sample error message which appears when too large value is attempted to set up All error messages are displayed in the center of the display OFF Local 05 00000 U DC pr r 46 e too large Accuracy B8 8858Z x18 18 The following table lists all error messages their meaning and simple troubleshooting User Manual v41 67 MC 142 Multifunction Calibrator POWERTEK description troubleshooting Overload 2V 2V range overloaded Output current is too high Increase load resistance Overload 20V 20 V range overloaded Output current is too high Increase load resistance Overload 200V 200 1000 V ranges Output current is too high Increase load resistance overloaded Overload I output Current output overloaded Voltage on the load is too high
146. the display These buttons usually call up the MENU allow range change step logging of values etc 2 Cursor buttons Using these buttons the cursor can be controlled within allowed limits on the display The keyboard includes two buttons lt gt which allow the cursor to be set to the required position at the display The cursor can be moved to the left or right These buttons are usually used to step through the options and to move from one option to another or between the menu levels Numeric values can be set in some control modes as well In these cases the buttons marked v allow the user to increase or decrease the number at the cursor button The central button is used to confirm the selection ENTER or to SELECT from the menu 3 Potentiometer The potentiometer integrates several functions By turning the knob to the left or right the user can e step through the options e enter numeric values 8 User Manual v41 POWERTEK MC 142 Multifunction Calibrator The function of the potentiometer can usually be performed by the cursor buttons The central button is used to confirm the selection ENTER 4 Numeric keyboard The keyboard allows the entry of numeric values on the display The central button is used to confirm the selection ENTER CANCEL button can be used to cancel the entry 5 Function buttons Function buttons can be used to call up the functions of the calibrator directly The following buttons ar
147. the first change of the coefficient RO is set to 100 Q This setting corresponds to Pt 100 resistance thermal sensor Entry of cold junction temperature For thermocouples the temperature of cold junction can be entered The entry is performed by setting the RJ field in the auxiliary data section of the display e Select the thermocouple mode and keep pressing the center cursor button until 1 symbols appear under the RJ xxxx x C value if C unit of measurement is used or under RJ xxxx x K value if K unit of measurement is used e Set the value using numeric keyboard Confirm the value by pressing C or K display button or by pressing ENTER 36 User Manual v41 POWERTEK MC 142 Multifunction Calibrator 8 6 2888 12 46 AT 8888 89 C TC type T Accuracy 8 490 KHK GE Automatic compensation of cold junction temperature Automatic cold junction TC sensors compensation can be performed when cable adapter Option 140 01 is used for simulating Ambient temperature measured by in cable adapter mounted Pt1000 sensor is taken as temperature of cold junction This automatic compensation is performed always when measuring of ambient temperature is activated on display push button INPUT ON green led lights When temperature measuring is not activated or cable adapter Option 140 01 is not connected manual compensation only is available Set value of RJ on the display to the appropriate ambient temperature to c
148. tion of the calibrator Calibrator should be tested directly from the front panel terminals and without use of terminal adapter 140 01 For build in multimeter testing cable adapters Option 40 and Option 60 are recommended To suppress influence of noise or interference with power line frequency in measuring circuit it is recommended following setting of the calibrator in SETUP MENU Current Coil OFF GNDU ON in capacitance test OFF GNDI ON in capacitance test OFF Note It is recommended to ground only the voltage channel GND U ON GND I OFF for all ranges except the generation of power or energy If the meter to be calibrated has Lo terminal grounded it is recommended to un ground both outputs of the calibrator GND U OFF GND I OFF to exclude ground loops If it is grounded neither calibrator nor standard meter higher level can occur on the output terminals In general when calibrator is connected to the standard meter ground loops can be arise through power line connection Ground loops can result apparently worse noise short term stability or non harmonic distortion of output signal If necessary use toroidal chokes to suppress this products Meter average 05 In all other items in SETUP MENU the setting of parameters don t influence accuracy of the calibrator Use sin waveform of the output signal on all AC tests Performance verification may be performed after warm up period i e 1 hour after switching on Calibrator
149. to reship the Calibrator use the original container If it is not available you can order a new container from manufacturer by identifying the Calibrator s model and serial number Power on Before connecting the calibrator to the mains check the position of the mains voltage selector located at the rear panel e Plug one end of the power cord into the connector located at the rear panel and connect the other end of the power cord into a wall outlet e Switch on the mains switch located at the rear panel Flat display is lit e The calibrator performs internal hardware checks for 5 seconds e After the tests conclude the calibrator resets to its reference state i e the following parameters are set Function DC voltage Range 20V Set value 10 V Output terminals OFF GPIB address of the calibrator is factory preset to 2 This value is valid until the user changes it Note The calibrator resets to its reference status in case of power switching off and reconnection Warm up time The calibrator works after it is switched on and the initial checks complete Specified parameters are only guaranteed after the instrument warms up for 60 minutes During this period the instrument cannot be calibrated The display shows cannot access the calibration message if calibration is attempted during this period 6 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Replacement of fuse The calibrator includes a fuse loca
150. ton and use lt gt v A cursor buttons or potentiometer to adjust output voltage Confirm correctly set value by pressing WRITE display button If you want to skip the calibration point whose calibration you have already entered press SKIP display button e Switch output terminals OFF 5 AC voltage ranges calibration a Select VOLTAGE AC from the calibration menu and confirm by pressing SELECT button Switch MC 142 output terminals ON b Follow the instructions provided on the calibrator s display and the ACU table to adjust the calibrator s output in the calibration points c To adjust the calibrator s output in the calibration points press SELECT button and use lt gt V A cursor buttons or potentiometer to adjust the output voltage Confirm correctly set value User Manual v41 59 MC 142 Multifunction Calibrator POWERTEK by pressing WRITE display button If you want to skip the calibration point whose calibration you have already entered press SKIP display button d Switch output terminals OFF Disconnect multimeter and calibrator 6 DC current ranges calibration a Connect current input terminals of the multimeter to the I I output terminals of the calibrator Select CURRENT DC from the calibration menu b Select DC current measurement range on external multimeter Switch output terminals ON c Follow the instructions provided on the calibrator s display and the DCI table to adjust the calibrator s
151. ueue Remote control REM cr This command activates the remote control When the calibrator is controlled by GPIB bus it goes to the remote control mode automatically When remote control is active the calibrator ignores all controls from the front panel except LOCAL button Local control LOC cr This command activates the local control using front panel buttons When the calibrator is controlled by GPIB bus it goes to the local control mode automatically Local control lock LLO cr This command locks out the local control the calibrator cannot be returned to local control by pressing LOCAL button Return to local control can only be performed by a command sent through the bus or by switching the calibrator off and on User Manual v41 99 MC 142 Multifunction Calibrator POWERTEK Local control unlock UNL lt cr gt This command cancels the LLO command Unlocked calibrator can be returned to local control mode by pressing LOCAL button 100 User Manual v41 POWERTEK MC 142 Multifunction Calibrator Standard Status Data Structures All status registers are defined by the IEEE 488 2 standard The programmer has access to Status Register Enable Register and Output Queue in the MC142 Calibrator Pon Tura owe exe oe ave 0 576 ESR Event Status Register Y Read using E SR 4 Output Queue A e PONE MT em A R MORE m w Read using E SE 4 White using ESR v 17 e
152. ured The multimeter can only be connected through AUXILIARY connector Description of controls chapter lists the pins of the connector Option 40 cable adapter has to be applied to connect the multimeter The manufacturer does not recommend connection of multimeter inputs to calibrator outputs Such connection can result in presence of high voltage at multimeter inputs which can damage the multimeter Basic menu e Multimeter setting menu can be opened by pressing the METER direct control button After the button is pressed SETUP METER menu opens which allows to set up the multimeter Press EXIT display button to return to previous menu e Press A or v cursor button to browse the menu options Active option is always inverted e The parameters of the active option can be changed if the respective function is allowed to be changed Use UP DOWN CLR NEXT and display buttons to change the parameters of the active option e Multimeter parameters can also be set using the potentiometer The potentiometer can be used either to browse the menu options or to change the value of the active option Press the knob to switch between these modes e Keep pressing EXIT display button to return to normal display when you are finished setting up the parameters 8 6 2886 12 4 SETUP METER B aagaaaE aga 1 888888E 888 B aagBaBE aBB 36 User Manual v41 POWERTEK MC 142 Multifunction Calibrator When the multimeter is be
153. urrent input of standard multimeter are connected in series If necessary adjust the zero point of the external multimeter before calibrating current range e Press SELECT display button to select calibration point 19 mA Red LED is lit above OUTPUT button Note Itcan occur that calibrator beeps and display error message In this case push the button OUTPUT ON to switch calibrator output manually e Adjust the calibrator s output current so that the external multimeter shows 19 0000 mA After the value stabilizes press WRITE display button to write new calibration value Terminals of multimeter will switch OFF Disconnect both the external and built in multimeter Disconnect cable adapter Option 40 from the AUXILIARY connector 100 resistance range calibration Calibration of both ranges 100 and 1000 consists of following steps OC calibration e resistance range of multimeter calibration For calibration of resistance ranges external standard 100 2 and 1000 Q are required Connect to the AUXILIARY connector cable adapter Option 60 0 Q calibration Make short of all four Option 60 input wires e Press SELECT display button to select the first calibration point 0 e After the value stabilizes press WRITE display button to write new calibration value 100 2 calibration e Connect resistance standard 100 Q to the input terminals Use four wire technique e Press SELECT display button to select the secon
154. value in the range of 00 to 15 15 Rotary change xx ON OFF This parameter controls the range of functions of the potentiometer If ON is set the potentiometer can move the cursor both to the left and right lt and symbols and up and down a and v symbols If OFF is set the potentiometer can move the cursor up and down only and v symbols 16 Switch polarity xx ON OFF This parameter controls the function of the built in relay If ON is set the relay is closes before the test If OFF is set the relay is opens before the test 17 Switch activity xx PASS FAIL This parameter controls the function of the built in relay If PASS is set the relay is active changes its status if the test results in PASS status If FAIL is set the relay is active changes its status if the test results in FAIL status 18 Cal code 00000 Entry of calibration code Calibration code is a five digit number which must be entered to access the calibration mode If the calibration code is set to 00000 this information is displayed in the Setup menu Calibration code can be changed New calibration code can be directly entered using numeric keyboard and confirmed by pressing ENTER If non zero calibration code is set correct calibration code must be entered to access the calibration mode Non zero calibration code is not displayed further on the display The purpose of the calibration code is to prevent unauthorized users fro
155. y signal FUNC SQU FREQ ATTE lt DNPD gt lt cr gt lt DNPD gt Represents the attenuation in decibels 0 to 30 dB can be set in 10 dB increments If query is sent MC142 returns the set value of the attenuation using standard exponential format Example 20 dB is returned as 2 00000e 001 SOUR TEMP UNIT lt CPD gt C CEL K This command sets the unit of measurement of temperature e Cor CEL sets Centigrade K sets Kelvin The unit of measurement remains valid after the calibrator is switched off If query is sent MC142 returns the set unit of measurement C K SOUR TEMP SCAL CPD TS68 TS90 This command sets one of temperature scales The setting influences the simulation of resistance temperature sensors and thermocouples e TS68 sets IPTS 68 temperature scale e TS90 sets ITS 90 temperature scale The temperature scale remains valid after the calibrator is switched off If query is sent MC142 returns the set temperature scale TS68 TS90 User Manual v41 93 MC 142 Multifunction Calibrator POWERTEK SOUR TEMP THER LEVE IMM AMPL lt DNPD gt This command activates the simulation of thermocouples DC voltage generation lt DNPD gt Represents the temperature expressed in the units set by the UNIT command Technical Data chapter lists the acceptable ranges If query is sent MC142 returns the set temperature using stand

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