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MC151 User Manual pdf

1. MCI51 Current calibrator Powertek 12 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 3 C Specified accuracy is one year accuracy DC AC current sine amplitude Summary range 8 mA to 120A Current resolution 5 dig Frequency range DC 15 Hz to 1000 Hz Frequency accuracy 0 005 Frequency resolution 0 001 Hz below 500 Hz 0 01 Hz below 1000 Hz Distortion lt 0 1 Output terminals isolation up to 450 Vpk against GND protective earth Rahes value value Max compliance 8 range range voltage V DC 15 40 Hz 40 70 Hz 15 400 Hz 400 1000 70 1000 Hz Hz 0 008000 0 300000 A 0 025 0 01 0 03 0 02 0 025 0 01 0 30001 1 00000A 09257001 s 093902 90257091 ss 35 or e 5 20001 50000 0 025 0 01 s 693902 5925x091 33 33 s 005 00 s 005 00 60 0001 120000 A 005 0 02 When option 151 25 Current Coil is used add 0 396 to the accuracy specified in the table above Output current is multiplied by factor 25 depending on applied coil range Multimeter 0 05 0 05 0 01 0 01 96 0 02 0 02 0 05 0 05 0 01 0 01 57 Operation manual MCISI Current calibrator Powertek
2. General data Warm up time Operating temperature Storage temperature Reference temperature Temperature coefficient Dimensions Net weight Power supply Power consumption Safety class Operation manual 15 min 5 C 40 C 10 C 55 C humidity lt 90 96 20 C 26 C 0 1x C in range 13 C 21 C and 25 C 33 C W 538 mm H 283 mm D 540 mm 42 kg 115 230V 50 60 Hz max 2000 VA I according EN 61010 58 MCIS1 Current calibrator Powertek 13 Accessories MCISI Basic accessories included in delivery e Power line cord I pc e User s manual I pc e Test report I pc e Spare fuse I pc e RS232 cable I pc Options extra ordered e 151 25 Current coil 25 turns e EEE488 IEEE488 GPIB cable 2m e Caliber Universal application SW for instruments calibration For UK sales support service and deliveries For USA sales support service and deliveries Powertek UK 19 Cornwallis Road Bilton Rugby CV22 7HL UK Powertek US Inc 7 Third Street Holbrook NY 11741 USA New Tel 01788 519911 Fax 0870 0940135 Tel 1 631 615 6279 Fax 1 973 273 5893 Int l Tel 44 1788 519911 Int l Fax 44 870 0940135 Email info powertekus com www powertekus com Email info powertekuk com www powertekuk com 59 Operation manual
3. Main value There is displayed main output value with the unit and indication of AC or DC picture There is displayed also actual position of cursor V A if the parameter is in edit mode Position of cursor can be changed using keys lt gt and parameter can be changed using keys v or using the rotary knob Auxiliary parameters This section displays auxiliary parameters of actually selected function e Frequency AC functions e Gain Amplifier mode e Step Amplifier mode Outputs state Window displays whether output terminals are connected or not connected Symbols displayed in window OFF output terminals are not connected output is off SW output terminals are connected output is on Specification In the field specification of set up output signal is shown Uncertainty is related to the main parameter Label BUSY instead of accuracy is displayed if calibrator is not within specified parameters or if internal reconnection is in process This can occur during changing the functions changing set parameters switching output terminals ON and OFF Operation manual 10 MCISI Current calibrator Powertek 5 Information section The information section located in the right part of the display and displays additional information related to the selected function e Information about the grounding method of output terminals Gnd as set up using the menu Calibrator e Information about the use of turn coil a
4. Pressing numeric key Pressing Select key in the middle of cursors keys Pressing cursor key Pressing the rotary knob In edit mode is edited value highlighted by blue background Pressing the Select key you can change among blue parameters Edit mode is finished by pressing Exit softkey Entry of the value using numeric keyboard Use the numeric keyboard to select the desired value After the first digit is entered input box is displayed In the upper row of the input box is the name of edited parameter Using softkeys you can enter the new value in different units Enter desired value After the entry is complete press softkey with requested unit or press Enter key Enter key inputs the value in basic units A Hz Source RC 8 83 21 9 2812 Local FF 1 00000 A y ees Gnd Off Frequencu Hz Coil Off Sync Int Calibrator sets new value The value is copied to the appropriate field in the screen and the input box disappears Entry of the value using cursor keys Press lt gt A or v key The display now includes cursor marks which points to the active digit and v keys can be used to change the active digit lt gt keys can be used to change the position of the cursor marks Operation manual 14 MCI51 Current calibrator Powertek To get to the default screen press Exit key All values can be set using the keys or the rotary knob Entry of the value usi
5. SRE Service Request Enable Register Status Register Overview Status data structure contains following registers STB Status Byte Register SRE Service Request Enable Register ESR Event Status Register ESE Event Status Enable Register Output Queue 53 Operation manual MCISI Current calibrator Powertek STB Status Byte Register STB is main register where information from other status registers and from output queue is collected Value of STB register is reset after switching on the calibrator or after sending command CLS This command reset the STB register except bit MAV which remains set if the output queue is not empty STB register value can be read via serial message or through general query STB Bit configuration of Status Byte Register OSS Operation Summary Status bit 7 SCPI defined The OSS bit is set to 1 when the data in the OSR Operation Status Register contains one or more enabled bits which are true RQS Request Service bit 6 The bit is read as a part of status byte only when serial message is sent 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 His value is derived from STB and SRE status ESB Event Summary Bit bit 5 His value is derived from STB and SRE status The ESB bit is set to 1 when one or more enabled ESR bits are set to 1 MAV Message Available bit 4 The M
6. Table AC current 29 Operation manual MCISI Current calibrator Powertek Current DC function Current DC Nominal value A Set limits A Range A Table DC current Multimetr Meter 100 uV 400 uV 500 nA 5uA 200 mHz Table Multimeter Operation manual 26 MCI51 Current calibrator Powertek 7 4 Full calibration procedure Required instruments Following pages describe procedure of the full calibration Following instruments are required for calibration 81 2 digit multimeter type HP3458A or Fluke 8508A or other type with accuracy 0 001 on DC voltage Calibrator Powertek MC142 or MC140 with DC ranges 10V 20mA and AC range 10V 10 kHz Resistance shunt 1 mQ 10 mQ 100 mQ Burster 1280 or other type with accuracy 0 01 Counter HP 53181A HO 53130 BM 642 or other with accuracy 0 001 HP8903A Distortion analyzer and scope with bandwidth min 20 MHz are recommended for THD measuring of AC signals Calibration procedure l 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 Menu key to call up the Main menu select Calibration end press Select softkey to enter the calibration menu 3 Enter the calibration code and press Enter key default calibration code is 0 4 AC current ranges calibration a Select Current AC from the calibration menu and confirm by pressing Select softkey Set the
7. activates the 25 turns current coil e USER activates the user current coil If query is sent calibrator returns USER if the user coil is activated X25 if the 25 turn coil is activated or OFF if the current coil is deactivated Example OUTP CURC X25 activates 25 turn current coil OUTP CURC Calibrator returns OFF USER or X25 OUTP CURC USER DNPD Operation manual 40 MCISI Current calibrator Powertek This command sets the number of the turns P kaz nastavuje hodnotu u ivatelsk z vitov c vky lt DNPD gt Parameter represents the number of the turns Example OUTP CURC USER 50 sets the 50 turn current coil OUTP SYNC lt CPD gt INT LINE EXT This command sets mode of output frequency synchronization e INT internal synchronization e LINE synchronization to power supply frequency e EXT synchronization to external signal If query is sent calibrator returns INT LINE or EXT according to selected synchronization mode Example OUTP SYNC INT selects frequency synchronization to internal reference OUTP SYNC Calibrator returns INT LINE or EXT OUTP SYNC LOCK CPD 0 1 This query returns the actual state of frequency synchronization e output frequnecy is not locked it is not possible to activate the output terminals e output frequency is locked to reference signal Example OUTP SYNC LOCK calibrator returns 1 or 0 MEASure a CONFigure subsystem This subsystem allow
8. lt DNPD gt lt DNPD gt lt DNPD gt This command sets time of the calibrator lt DNPD gt lt DNPD gt lt DNPD gt Represents time in format HH MM SS If query is sent calibrator returns current value of system time in format HH MM SS where HH hour 00 23 MM minute 00 59 SS second 00 59 SYST ERR Query the multimeter s error queue Detected errors are placed in the queue This query returns the first error from the queue The queue is type first in first out The error is deleted after reading The response is in the form of String Program Data and consists of two elements a code number and error message If all errors are read calibrator returns message 0 No Error In case of overflow the error queue the last error in the queue is 350 Queue overflow Also the earliest errors remain in the queue and the most recent error is discarded Operation manual 46 MCISI Current calibrator Powertek Example SYST ERR SYST REM This command places the calibrator in the remote mode for RS232 operation AII keys on the front panel except the LOCAL key are disabled Note It is not possible to send or receive data over RS232 when the calibrator is not in remote mode SYST RWL This command places the calibrator in the remote mode for RS232 operation AII keys on the front panel including the LOCAL key are disabled SYST LOC This command returns the calibrator in the local mode
9. 49 Operation manual MCISI Current calibrator Powertek IEEE488 2 Common Commands VD instrument identification IDN This command returns the identification of the manufacturer model serial number and firmware revision The reply is formatted as follows Powertek M151 510001 1 22 Operation complete OPC This command sets the OPC bit in the ESR Event Status Register when all pending operations are complete Operation complete OPC This command returns 1 to the output queue after all pending operations are complete Wait to Continue command WAI Prevents the instrument from executing any further commands or queries until all previous remote commands have been executed Reset RST This command resets the calibrator to its initial status Test operation TST This command launches an internal self test Return the self test result 07 for pass or 1 for fail Status byte reading Operation manual 50 MCISI Current calibrator Powertek STB This guery returns number in range 0 to 255 with information about content of register STB which carries the MSS bit status Service Reguest Enable SRE lt value gt This command sets condition of the Service Reguest Enable register Since bit 6 is not used the maximum value is 191 Service Reguest Enable reading SRE This guery returns the Service Reguest Enable Register number Event Status Register reading ESR Thi
10. Note 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 arising 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 these products Performance verification may be performed after warm up period i e 1 hour after switching on Calibrator have to be in temperature stabilize condition at minimum 8 hours before performance verification test is started 33 Operation manual MCISI Current calibrator Powertek Basic steps of the performance verification test Verification procedure consists of following steps 1 A DC current test with linearity check DC current internal ranges 300 mA 2 A 5 A 10 A 30 A 60 A 120 A test AC current internal ranges 300 mA 2 A 5 A 10 A 30 A 60 A 120 A test Frequency nominal value 1 kHz test Multimeter internal ranges 20 VDC 200 mADC frequency 10 kHz test 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 l 10 11 Connect the calibrator to the mains and let them switched on for at least one hour in a laboratory at 23 1 C Connect current input of standard multimeter to the current out
11. This command is for RS232 47 Operation manual MCISI Current calibrator Powertek STA Tus subsystem This subsystem is used to enable bits in the Operation and Questionable Event registers The Operation and Questionable Event Enable and Condition registers can be interrogated to determine their state STATus OPERational EVENt ENABle lt DNPD gt CONDition QUEStionable EVENt ENABle lt DNPD gt CONDition PRESet STAT OPER EVEN This query returns the content of Operational Data Event register It is a decimal value which corresponds to the binary weighted sum of all bits set in the register Register is cleared after this query Example STAT OPER EVEN STAT OPER ENAB lt DNPD gt This command enables bits in the Operational Data Enable register Selected bits are summarized at bit 7 OSS ofthe IEEE488 2 Status Byte register lt DNPD gt Parameter represents required value of Operational Data Enable register If query is sent calibrator returns the value of the registr as a decimal number Example 64 is returned as 64 Example Set bit 1 in the Operational Data Enable register other bits are 0 STAT OPER ENAB 2 STAT OPER COND This query returns the content of Operational Condition register It is a decimal value which corresponds to the binary weighted sum of all bits in the register Register is not cleared after this query The response to the query therefore represents
12. operation 2 1 Inspecting package contents selecting the installation location Basic package includes the following items MC151 Current calibrator Power cord Spare fuse Operational manual Test report RS232 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 3 C Before powering on the instruments place it on a level surface Do not cover the vents at the front side and the fan opening at the rear panel 2 2 Power on Before connecting the calibrator to the mains check the position of the mains voltage selector located at the rear panel 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 Switch on the mains switch located at the rear panel Flat display is lit The calibrator performs internal hardware checks for 5 seconds After the tests conclude the calibrator resets to its reference state i e the following parameters are set Function AC current Current range 1A Set value 1A Frequency 50 Hz 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 Operation manual 6 MCI51 Current calibrator Powertek 2 3 Warm up time The calibrator works after it is switch
13. 0 to 7 Press the Write softkey to set the display s brightness and return to the General menu 3 Beeper 19 Operation manual MCISI Current calibrator Powertek This parameter enables disables the signalization of pressed key Possible states are Beep On and Beep Off Press the Select softkey or press in on the rotary knob to set the selected state 4 Calibration Password This parameter sets the calibration password Calibration password is a five digit number which must be entered to access the calibration mode If the calibration password is set to 0 this information is displayed in the General menu Other values are displayed as Secret You will be prompted to enter the present calibration password use the numeric keyboard and confirm with Enter key Now you can change the calibration password Cursor keys rotary knob or numeric keyboard allow setting the value in the range of 0 to 99999 Press the Write softkey to set the display s brightness and return to the General menu 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 5 Time Setting the real time The parameter can be changed using cursor keys rotary knob or numeric keyboard 6 Date Setting the date The parameter can be changed using cursor keys rotary knob or numeric keyboard 7 Device Information Viewing the device i
14. AV bit is set to 1 whenever data is available in the IEEE488 Output Queue the response on query is ready QSS Questionable Summary Status bit 3 SCPI defined The QSS bit is set to 1 when the data in the QSR Questionable Status Register contains one or more enabled bits which are true SRE Service Request Enable Register The Service Request Enable Register suppresses or allows the STB bits 0 value of a SRE bit means that the bit does not influence value of MSS bit Value of any unmasks STB bit results in setting of the MSS bit to the level 1 SRE bit 6 is not influenced and its value is 0 The SRE register value can be set via the command SRE followed by mask register value 0 191 The register can be read with the command SRE The register is automatically resets after switching the calibrator on The register is not reset by the command CLS ESR Event Status Register Every bit of the EventStatusRegister corresponds to one event Bit is set when the event is changed and it remains set also when the event passed The ESR is cleared when the power is turned on except bit PON which is set and every time it is read via command ESR Or cleared with CLS 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 Bit is not used and it is always 07 Operation manual 54 MCISI Current
15. C 60 0 A 60 0 55 30 0 m A AC 120 0 A 120 0 55 60 0 m Table III 35 Operation manual MC151 Current calibrator Powertek Frequency test Function Range Value Hz Frequency Hz Deviation allowed Hz FREQ 1 kHz 1000 0 5 Table IV Multimeter test Function Range Value Frequency Hz Deviation allowed FREQ 10 kHz 10000 0 Hz 0 5 HZ V DC 20 V 20 0 V 2 6 mV V DC 20 V 20 0 V 2 6 mV A DC 200 mA Oe 25A 33 uA A DC 200 mA 0 2 A 33 HA Table V Operation manual 36 MCI51 Current calibrator Powertek 11 System control The calibrator is equipped with RS232 serial line and IEEE488 bus System connectors are located at the rear panel For the remote control to work properly interface parameters must be set in the system menu For RS232 line communication speed can be set 1200 to 115200 Bd For IEEE488 bus an address from range 0 to 30 is allowed The calibrator can be only controlled by one of interfaces at a time It is therefore necessary to select one of the interfaces RS232 IEEE488 using the system menu 11 1 IEEE488 bus properties The instrument performs the following functions based on IEEE488 bus commands SH1 AHI T5 L3 RL1 DCI SRI The instrument also recognizes the following general commands Dio Dios DCL Device Clear reset the calibrator Di Dos SDC Selected Device Clear reset the calibrator NRF eommmwwo EOI End or Identify Message
16. Calibration Menu Default calibration password is 0 For more detail about calibration see the chapter 7 Operation manual 22 MCI51 Current calibrator Powertek 7 Calibration mode The calibrator includes calibration procedure which allows recalibration of the calibrator Recalibration can be performed using the keys and menu in the calibrator 7 1 Calibration principles The instrument can be calibrated 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 Current AC 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 can be finished in any point of the calibration procedure However this particular calibration influences parameters of the calibrator Accuracy of the calibrator is guaranteed when full calibration was done AC current Current AC calibration is performed by setting 2 fixed points for all current ranges The frequency is 55 Hz DC current Cur
17. MC151 Current Calibrator Operation manual Powertek MCI51 Current calibrator Powertek Content PARS Cop p M 5 PEINE uM t ess 6 2 Inspecting package contents selecting the installation location s 6 2 2 POWOE OInu unseres 6 23 Warm up time oett o prep ee d s eb gsee rco aex Tos HOE Lees eset es vob PSPS soia stos Ede 7 2 4 Replacement Of Tuse ssion ett 7 2 5 Safety precatio iS eee et esee toro acres apa oe ear ko bu gue eu Epeen o esso kie osses ssa oeeo t esta oses E 7 3 Description of COHIYOlS aan innen ibn 8 AJ ZEront panel Zr 8 Ba Rear panel auen enenanseieiseirmubsikisinishithleseh ismsetiiigpteite 12 4 Control of Ihecahbrator scsssssisssesssisesressroessosiisossesesoisessoicsstosasso toese to WERE ve bae Ce vU EON e UR 13 4 1 Selection Of function e Q 13 4 2 Setting the value of output signal 4 eeeee crees eee eese eene eerte netta seen sete ta seta seen na see 14 4 3 Connection disconnection of output terminals e eere ener eese eren ener en nee na aee 15 AA SOURCE M d cC 15 AS AMPLIFIER mode occorre bote pei it pror guten el dere 17 3 Multimeter susanne eni bepe Iob k s se dvabeeeav e udkas eC aede D EEES 18 EMO TIDGDIE TUI 18 6 Calibrator setup menu Main menu ecce eee e eene eene eene en aset tn aset tn s
18. Terminator close the message ES ST 9b aw PAIR wire GTL Go To Local close remote control mode SHIELD senteron LLO Local Lock Out local control locked SPD Serial Poll Disable close serial message status SPE Serial Poll Enable release serial message status 11 2 RS232 serial line setting 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 1200 2400 4800 9600 19200 38400 76800 and 115200 Bd RS 232 connector layout 4 5 Pin Name Direction Description 2 TXD Output Transmitter 6 9 3 RXD Input Receiver 5 GND Ground 9 pin connector D SUB FEMALE Cable between the calibrator and PC configuration 1 1 37 Operation manual MCISI Current calibrator Powertek Cb Sub i p Sub2 Receiver Receiver S Note It is not possible to send or receive data over RS232 when the calibrator is not in remote mode You should use the command SYST REM or SYST RWL 11 3 Command syntax The commands described in this chapter can be issued through all buses RS232 IEEE488 All commands listed in this chapter are explained in two columns KEYWORD and PARAMETERS KEYWORD column includes the name ofthe 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 c
19. UIC AION uisa loai RER 57 13 Accessories eT 59 Operation manual 4 MCI51 Current calibrator Powertek 1 Basic information MC151 Current calibrator is accurate current source up to 120 A It can be used for calibration of ammeters or as stable current source for precise measurement The calibrator is equipped with a built in multimeter that can be used for simulation of programmable transconductance or current amplifier Basic features of the calibrator include generation of calibrated AC and DC current in the range of 8 mA to 120 A Frequency range is 15 Hz to 1000 Hz Internal multimeter with ranges 200 mA 20 V and 10 kHz can be used for simulation of programmable transconductance or current amplifier The calibrator includes many other features which facilitate easy use For example it is currently displayed uncertainty of the output signal calibration and testing procedures etc The concept of calibrator control and indication of its status is based on large TFT color 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 IEEEA488 bus and RS 232 serial line which allow the calibrator to be controlled from a PC The calibrator is supported in the automated calibration system Caliber 5 Operation manual MC151 Current calibrator Powertek 2 Preparation for
20. ample 5 123 A V is returned as 5 123000e 000 Example Gain 8 05 A V GNU 8 05 SOUR GNI lt DNPD gt This command sets the gain value in current amplifier mode AMAC and AMDC lt DNPD gt Parameter represents the value ofthe gain expressed in A A If query is sent calibrator returns the value of output current using standard exponential format Example 612 A A is returned as 6 120000e 002 Example Gain 600 A A GNI 600 SOUR STEP lt DNPD gt This command sets the output current step value in AMAC and AMDC mode lt DNPD gt Parameter represents the value of the output current step expressed in A If query is sent calibrator returns the value of output current using standard exponential format Example 0 5 A is returned as 5 000000e 001 Example Step 0 5 A STEP 0 5 45 Operation manual MCISI Current calibrator Powertek SYSTem subsystem The subsystem enables to control various functions from the MENU SYSTem DATE lt DNPD gt lt DNPD gt lt DNPD gt TIME lt DNPD gt lt DNPD gt lt DNPD gt ERRor REMote RWLock LOCal SYST DATE lt DNPD gt lt DNPD gt lt DNPD gt This command sets system date of the calibrator lt DNPD gt lt DNPD gt lt DNPD gt Represents date in format YYYY MM DD If query is sent calibrator returns current value of system date in format YY Y Y MM DD where YYYY year 2000 2099 MM month 01 12 DD day 01 31 SYST TIME
21. an instantaneous Snapshot of the register state at the time that the query was accepted Operation manual 48 MCISI Current calibrator Powertek Example STAT OPER COND STAT QUES EVEN This query returns the content of Questionable Data Event register It is a decimal value which corresponds to the binary weighted sum of all bits set in the register Register is cleared after this query Example STAT QUES EVEN STAT QUES ENAB lt DNPD gt This command enables bits in the Questionable Data Enable register Selected bits are summarized at bit 3 OSS of the IEEE488 2 Status Byte register lt DNPD gt Parameter represents required value of Questionable Data Enable register If query is sent calibrator returns the value of the registr as a decimal number Example 64 is returned as 64 Example Set bit 1 in the Questionable Data Enable register other bits are 0 STAT QUES ENAB 2 STAT QUES COND This query returns the content of Questionable Condition register It is a decimal value which corresponds to the binary weighted sum of all bits in the register Register is not cleared after this query The response to the query therefore represents an instantaneous Snapshot of the register state at the time that the query was accepted Example STAT QUES COND STAT PRES This command clears all bits in the Operation Data Enable register and in the Questionable Data Enable register Example STAT PRES
22. calibrator Powertek CME Command Error bit 5 This event bit indicates that an incorrectly formed command or query has been detected by the instrument 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 limits 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 Error 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 The bit is set if the calibrator is addressed as talker and output queue is empty or if control unit did not pick up response before sending next query 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 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 zer
23. d Step of the output current Connect the control signal voltage or current to the meter terminals located on the rear panel In case of internal frequency synchronization must be set also frequency of output current In case of external or power supply frequency synchronization wait until the frequency is synchronized light green circle near the frequency value 0 Connect the instrument to be calibrated to CURRENT OUTPUT HI LO Press OPER key Green symbol is lit on the display to indicate the connection of output terminals If Coil x25 or Coil user function is activated see below Main menu the optional current coil must be connected to the output terminals The calibrator can be used to calibrate clamp Amp meters up to 3000 A 17 Operation manual MCISI Current calibrator Powertek 5 Multimeter The calibrator includes a built in multimeter which can measure AC DC voltage AC DC current and frequency Measured signal must be connected to the terminals on the back side Terminals mA COM are for current measurements Terminals V COM are for voltage and frequency measurements 5 1 Function selection e Measurement function should be selected in Main menu item Meter or VOLTAGE CURRENT keys e Press UP DOWN display keys or use the rotary knob to select one of the following functions Voltage AC voltage range 20 V 15 10000 Hz DC voltage range 20 V Current AC current range 200 mA 15 10000 Hz DC cu
24. d command doesn t contain valid numeric 120 Numeric data parameter 110 Command header Remote interface error Received command isn t valid 501 Eeprom write failed 502 Eeprom read Eeprom read failed Operation manual 30 MCI51 Current calibrator Powertek 503 Eeprom error Eeprom data lost Check calibration data Output signal over specified limits Decrease signal level or decrease the 701 704 Output overload load Calibrator power stage overheated Disconnect external load Ambient 703 High temperature temperature is too high or forced ventilation holes are blocked 705 Input overload Input signal over specified limits Decrease signal level Current output terminals overloaded Decrease signal level or decrease the 706 Current output overload load 722 Error in internal communication 721 Error in internal communication 730 731 Error in internal communication 732 Calibrator will be restarted 743 Error in internal communication 745 Error in internal communication 746 747 748 Slave error Error in internal communication 9 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 e The calibrator can only be switched on and off by pressing t
25. ection of function After the power is switched on and the initial checks complete the calibrator resets to its reference state Function Source AC Current 1A Frequency 50Hz The state of the calibrator can be changed using the keys located at the front panel in one of the following ways 1 Change of function by pressing one of direct function keys After pressing one of the keys SOURCE AMPLIFIER VOLTAGE or CURRENT calibrator switches to the selected function and set the last set up parameters Whenever function is changed calibrator always goes over to STANBY position Output terminals are disconnected 2 Connection disconnection of output terminals After pressing the OPER key the output terminals of the calibrator are connected To disconnect active terminals push the OPER key again 3 Select AC DC current After pressing AC DC softkey the calibrator changes AC to DC signal or DC to AC signal 4 Access to the Main menu After pressing the SETUP softkey the calibrator displays the basic level of the setup menu In this menu you can change instruments setting and calibration data Previous function is recalled after pressing Exit softkey 13 Operation manual MCISI Current calibrator Powertek 4 2 Setting the value of output signal Edit mode Parameters of output signal can be changed in Edit mode Only parameters displayed in blue color can be changed Display can be switched to edit mode in different ways
26. ed 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 2 4 Replacement of fuse The calibrator includes a fuse located next to the mains connector at the rear panel Replace the fuse as follows e Switch off the calibrator e 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 e Remove the fuse and replace it with new fuse of the same rating 2 5 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 is 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 7 Operation manual MCISI Current calibrator Powertek 3 Description of controls 3 1 Front panel The front panel of the calibrator includes a TFT color display control keys and output terminals The following picture shows the control part of the front panel 9 1 2 3 4 urrent Calibrator d s 120 000 A
27. ent calibrator Powertek This command sets the output current value in Current AC mode lt DNPD gt Parameter represents the value of the output current expressed in A If query is sent calibrator returns the value of output current using standard exponential format Example 11 012 A is returned as 1 101200e 001 Example Current 23 05A CAC CURR 23 05 Note Command switches the calibrator in Current AC mode SOUR CAC FREQ lt DNPD gt This command sets the frequency in Current AC mode lt DNPD gt Parameter represents the value of frequency expressed in Hz If query is sent calibrator returns the value of frequency using standard exponential format Example 50Hz is returned as 5 000000e 001 Example Frequency 60Hz CAC FREQ 60 Notes Command switches the calibrator in Current AC mode SOUR CDC CURR lt DNPD gt This command sets the output current value in Current DC mode lt DNPD gt Parameter represents the value of the output current expressed in A If query is sent calibrator returns the value of output voltage using standard exponential format Example 11 012 A is returned as 1 101200e 001 Example Current 23 05A CDC CURR 23 05 Note Command switches the calibrator in Current DC mode SOUR AMAC CURR lt DNPD gt This command sets the output current value in AMAC mode 43 Operation manual MCISI Current calibrator Powertek lt DNPD gt Parameter represents the
28. ete ta sete tasse ta se ena se enoa 19 6 4 General 2i m gehen ross oasi 19 6 2 Interface WU Cr this secce ces scnseecsndecbccsexocenesnosatoasdaccevasucistcdein oceeabastausnusaetiecssivacectvadeatnivennseeseustsees 20 6 3 Calibrator MERI soiree hie nist a nennen 20 6 4 Meter MEN op DU be e nct dentur RU Dc n dis 21 6 5 Calibration Mena 222 22 7 Calibration p m 23 7 1 Calibration principles u a ns 23 7 2 Access to the calibration procedure ssesssecssoossoossoossssesssessoossoosssoessoesssosssoosssossssssssee 23 7 3 Selection of calibration type esescoessoesssesssesssoossoosssocsssssssesssossoocsssesssesssosssoosssosssssessssssoo 24 7 4 Full calibration procedure eesssoescoesssesssesssesssoossoossoossssesssessoossooessossssesssoessoosssosssssssose 27 ME DU SUI CIEN TT C 30 9 MA ten Tu Nec c 31 3 Version 10 Operation manual MC151 Current calibrator Powertek 10 Verification t st cei dcmum eatecddvhpubit stie teo v obovato D Hebe v PV oed Ud 33 If System control s ao teri etie b eeture eei sea k AYER VR VEEE Eo aese ls sa VE dV pi Ro ee egi VOS 37 1134 TEEEA88 bus properties wc ssccccsicssscssscsansisceasscoonsdoccasscancoovsienciessebansivedvesrvenstoncavecbadwonnes 37 11 2 7 RS232 serial line Settings Pape nio Seek e a bubo kei ses sepe pe uk 37 11 3 Command SIR T T 38 11 4 Standard Status Data Structure 53 12 SW CC
29. grounding loops are formed e proximity to sources of intensive influence whose products are spread through the mains or propagated by the electromagnetic field e strong electrostatic or electromagnetic field which can cause major instability during calibration using higher impedance Operation manual 32 MCI51 Current calibrator Powertek 10 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 01 on AC voltage e Multifunction calibrator Powertek MC142 or MC140 with DC ranges 20 V 200 mA and AC range 20 V 15 kHz e resistance shunt 1 mQ 10 mQ 100 mQ Burster 1280 or other type with accuracy 0 01 e counter HP 53181A HO 53130 BM 642 or other with accuracy 0 001 HP8903A Distortion analyzer and scope with bandwidth min 20 MHz 100 kHz bandwidth is recommended for THD measuring of AC signals Configuration of the calibrator Calibrator should be tested directly from the front panel terminals To suppress influence of noise or interference with power line frequency in measuring circuit it is recommended following setting of the calibrator in Main menu 1 Current coil Coil Off 2 Current sources GND GndI On
30. have the following meaning Write new calibration value is entered into the memory old value is lost The calibrator returns to the previous menu Skip current calibration step is skipped old value is retained in the memory The calibrator returns to the previous menu Moreover the display shows the range which is being calibrated Range 300mAac and the value to be set at the external standard multimeter value in brackets 30mA Operation manual 24 MCISI Current calibrator Powertek Setting the new calibration data Use cursor keys rotary knob or numeric keyboard 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 softkey to write new calibration value to the calibration memory If you press Exit softkey the calibrator ignores the new value and old value is retained The procedure is repeated for all calibration points of the selected function If you press Exit softkey the calibrator returns back to the previous menu level Termination of calibration Calibration can be terminated by repeated press the Exit softkey until the calibrator returns to the Main menu Calibration points Each function of the calibrator has assigned fixed calibration points which have to be set during the calibration Current AC function Current AC Nominal value A Set limits A Range A
31. he mains switch located at the front panel Do not connect the calibrator to other voltage than set by the voltage selector Do not block the vent openings located at the rear panel and front panel e 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 e 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 e Whenever possible use the setup menu to ground Lo output terminals Gndl On Do not overload the power stages by leaving the calibrator switched on with the load connected for a long time e Ensure that used cables are suitable for the calibration current 31 Operation manual MCISI Current calibrator Powertek 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 alcohol The calibrator should be calibrated in the recommended 12 month intervals A calibration center has to perform this calibration What to do in case of failure If a
32. lue to be set as well as requested er carriage return ASCII code 13 This code executes the program line If line feed ASCII code 10 This code executes the program line 39 Operation manual MCISI Current calibrator Powertek OUTPut subsystem This subsystem enables to activate or deactivate the calibrator output Keyword Parameters OUTPut STATe lt CPD gt ON OFF LOWCurrent lt CPD gt FLOat GROund CURCoil lt CPD gt OFF X25 USER USER lt DNPD gt SYNChronization lt CPD gt 1 INT LINE EXT LOCKed lt CPD gt 0 1 OUTP STAT lt CPD gt ON OFF This command activates or deactivates output terminals ON activates the output e OFF deactivates the output If query is sent calibrator returns ON if the output is active or OFF if it is inactive Example OUTP ON activates the output OUTP the calibrator returns ON or OFF OUTP LOWC CPD FLO GRO This command connects or disconnects the Lo terminal of current output to from GND terminal e FLOat ungrounds current output e GROund grounds current output If query is sent calibrator returns GRO when the output is grounded or FLO when floating Example OUTP LOWC GRO OUTP LOWC Calibrator returns FLO or GRO OUTP CURC lt CPD gt OFF X25 USER This command activates or deactivates the use of 25 turns or user current coil e OFF deactivates the current coil e X25
33. n 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 e Insert the blade of a flat screwdriver into the opening cut in the mains voltage selector and pry out the fuse holder e Remove the fuse Replace it with new fuse of the same rating if the fuse was broken e 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 operator Most frequent cases of false hidden defects e mains voltage out of tolerance limits or unstable e wrong grounding of the measurement circuit bad connection of the ground terminal of the mains outlet or several ground connection when
34. nd range should be recalibrated It is not necessary to recalibrate all functions but only this one which does not meet specification See chapter Calibration mode where recalibration procedure is described Tables of limits 1 A DC Basic range with linearity test Function Range Value A Frequency Hz Deviation allowed pA A DC 1A 0 4 200 A DC 1A 0 v5 225 A DC 1A 0 6 250 A DC 1A 0 7 275 A DC 1A 0 8 300 A DC 1A 0 9 325 A DC 1A 1 0 350 A DC 1A 0 4 200 A DC 1A 0 5 225 A DC 1A 0 6 250 A DC 1A 0 7 235 A DC 1A 0 8 300 A DC 1A 0 9 325 A DC 1A O 350 Table I DC current test Function Range Value A Frequency Hz Deviation allowed pA A DC 300 0 mA 0 3 105 u A DC 300 0 mA 0 3 105 n A DC 2 0 A 2 0 700 n A DC 2 0 A 260 700 p A DC 5 0 A 55 0 1 75 m A DC 5 0 A 940 1 75 m A DC 10 0 A 10 0 4 5 m A DC 10 0 A 10 0 4 5 m A DC 30 0 A 30 0 15 0 m A DC 30 0 A 30 0 15 0 m A DC 60 0 A 60 0 30 0 m A DC 60 0 A 60 0 30 0 m A DC 120 0 A 120 0 60 0 m A DC 120 0 A 120 0 60 0 m Table II AC current test Function Range Value A Frequency Hz Deviation allowed pA A AC 300 0 mA 0 3 55 105 n A AC PZO A 1 0 55 350 u A AC 1 0 A 1 0 800 500 n A AC 2 0 A 2 0 55 800 n A AC 5 0 A 5 0 55 1 75 m A AC 10 0 A 10 0 55 4 5 m A AC 30 0 A 30 0 55 15 0 m A A
35. nformation Displays the serial number and software version 6 2 Interface Menu Submenu contains remote control parameters l Active interface Sets the type of interface used to calibrator s remote control By selecting an item from the list IEEEA88 RS232 or Ethernet type can be selected The calibrator can be remotely controlled only using the selected interface 2 IEEE488 address Sets the calibrator s IEEE488 GPIB address Cursor keys rotary knob or numeric keyboard allow setting the value in the range of 0 to 30 Address 02 is set by the manufacturer 3 Baud rate Sets the communication speed of RS232 bus By selecting an item from the list 1200 2400 4800 9600 19200 38400 76800 or 115200 Bd can be selected 6 3 Calibrator Menu Submenu contains parameters that affect generated signal Operation manual 20 MCI51 Current calibrator Powertek 1 Current output Lo GND This parameter allows connecting Lo terminals of current output to GND In practice this means that Lo current terminals are grounded By selecting an item from the list Gnd Off and Gnd On type can be selected It is recommended to ground output Gnd On If the meter to be calibrated has Lo terminal grounded it is recommended to unground the corresponding calibrator s output to exclude ground loops Note If neither the calibrator s output nor the meter s inputs are grounded signal noise ratio can arise at the calibrator s output 2 C
36. ng the current e Repeatedly press the Select key in the middle of cursor keys until the current value appears in edit mode grey background e The value can be set using numeric keyboard and confirmed by pressing mA or A softkey The value can be set using cursor keys or rotary knob as well 2 Setting the freguency AC current only Operation manual 16 MCI51 Current calibrator Powertek e Repeatedly press the Select key in the middle of cursor keys until the frequency value appears in edit mode grey background e The value can be set using numeric keyboard and confirmed by pressing Hz softkey The value can be set using cursor keys or rotary knob as well 4 5 AMPLIFIER mode The calibrator generates output current according to the input value measured by internal meter Current range 8 mA to 120 A When 25 turn coil option 151 25 is used Current range is up to 3000 A Control in the AMPLIFIER mode Press AMPLIFIER key on the calibrator and then select AC or DC mode by pressing display key The display shows the following data main current through the CURRENT OUTPUT HI LO terminals uncertainty of current frequency if AC current is selected gain of simulated amplifier step of generated current step 1 0 A means that output current is generated in entire amperes 1A 2A 120A X 0 X X X X Select type of he input signal by pressing VOLTAGE or CURRENT meter key Set required Gain an
37. ng the rotary knob Note Press the rotary knob The display now includes cursor marks which points to the active digit Turn the knob to change the active digit Press the rotary knob to change to the mode which allows changing the value of the active digit and symbols are displayed above the active digit Active digit can be changed by turning the knob Turn the knob to change the position of the active digit To get to the default screen press Exit key All values can be set using the keys or the rotary knob All parameters have limits high and low If the entered value is outside these limits error message is displayed Value too large small and new value is not accepted 4 3 Connection disconnection of output terminals After switching the AC power supply on the output terminals are disconnected in all modes Press the OPER key to connect the output signal to the terminals Symbol displayed in window Press the OPER key again to disconnect the output terminals Symbol displayed in window now Output terminals are disconnected automatically under following conditions Function mode change Calibrator is overloaded Synchronization is lost AMPLIFIER 44 SOURCE mode 15 Operation manual MCISI Current calibrator Powertek The calibrator can generate calibrated current Output terminals for current ranges are CURRENT OUTPUT HI LO terminals Current setting range 8 mA t
38. o 120A When 25 turn coil option 151 25 is used Current range is up to 3000 A Control in the SOURCE mode e Press SOURCE key on the calibrator and then select AC or DC mode by pressing display key The display shows the following data main current through the CURRENT OUTPUT HI LO terminals frequency if AC current is selected uncertainty of current e Set desired value of current using numeric keyboard rotary knob or cursor keys Output current is not yet connected to the output terminals e Connect the instrument to be calibrated to CURRENT OUTPUT HI LO e Press OPER key e Green symbol is lit on the display to indicate the connection of output terminals e If Coil x25 or Coil user function is activated see below Main menu the optional current coil must be connected to the output terminals The calibrator can be used to calibrate clamp Amp meters up to 3000 A Overloading of output 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 Output Overload message The same message can be displayed when current coil is used for AC current output at frequencies above 80 Hz It depends on the set current and the type of ammeter connected Setting the current in modes Idc Basic and Iac Basic The calibrator allows several ways of setting the value of generated current 1 Setti
39. o clears the ESE The Event Status Enable Register is cleared upon power on It suppresses or allows bits in ESR register Value 0 of a bit of ESE register suppresses influence of appropriate bit of ESR register on value of sum bit of ESB status register Setting of any unmask bit of ESR register results in setting of ESB status register ESE register value can be modified by command ESE followed by value of mask register integer in range 0 255 Reading of the register can be performed with command ESE The register is automatically reset after switching on The register is not reset with CLS command Operation Status Register Not used in the calibrator Questionable Status Register Not used in the calibrator Output Queue The Output Queue stores response messages until they are read from control unit If there is at minimum one sign in the output queue MAV register message available is set The Output Queue is cleared upon power on and after reading all signs from output queue Error Queue 55 Operation manual MCISI Current calibrator Powertek The Error Queue stores error messages They are placed in a first in first out queue The queue is read destructively using the query command SYSTem ERRor to obtain a code number and error message The query SYSTem ERRor can be used to read errors in the queue until it is empty when the message 0 No Error will be returned Operation manual 56
40. ompatibility 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 CURR 100 5 OUTP ON Note only for RS232 Each command must end in cr or lt If gt Both codes lt crlf gt can be used at the same time The calibrator 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 SPD String Program Data String value consisting from more parts It is used for date time setting 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 Operation manual 38 MCISI Current calibrator Powertek A flag indicating a request for the parameter specified by the command This command permits a va
41. onnect external current source 200 mA DC to the calibrator input terminals METER INPUT mA COM Exact value can be measured by serial standard ammeter Operation manual 28 MCISI Current calibrator Powertek 29 c Adjust main value on the display It should be equal to the value measured by standard multimeter Use lt gt v cursor keys rotary knob or numeric keyboard to adjust the main value Confirm new value by pressing Write softkey 10 kHz frequency range calibration Select calibration point 10 kHz Connect external AC voltage 10 kHz voltage between 10 to 20 V to the calibrator input terminals METER INPUT V COM Exact frequency value can be measured by parallel standard counter Adjust main value on the display It should be equal to the value measured by standard counter Use lt gt v cursor keys rotary knob or numeric keyboard to adjust the main value Confirm new value by pressing Write softkey Operation manual MCISI Current calibrator Powertek 8 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 e 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 Incorrect control using GPIB or RS 232 interface e Calibrator s fault Source RC 13 89 26 9 2812 Local Error 711 AEE Value t
42. oo large 8 835 Gnd Off Frequency 58 888 Hz Coil off Sync Int Input Umeter Sa Amplitude 6 0618 U Frequency 6 8888 Hz Sample error message which appears when too large value is attempted to set up is shown bellow All error messages are displayed in the frame overlapped main screen The following table lists all error messages their meaning and simple troubleshooting ID Error message Description Remote interface error A command was received which generates too much data to fit in the output buffer and the output buffer is full Command 430 Deadlocked execution continues but all data are lost nn Remote interface error The calibrator was addressed to talk but a command 420 Unterminated has not been received which sends data to the output buffer Remote interface error A command was received which sends data to the output buffer but the output buffer contained data from a previous command The output buffer is cleared when power has been off or after 410 Interrupted reset command has been executed 363 Input buffer overrun Remote interface error Remote interface error An invalid character string was received Check to see if you have enclosed the character string in single or double quotes and 220 Invalid parameter that the string contains valid ASCII character Bern Remote interface error Received command doesn t contain valid character 140 Character data parameter has Remote interface error Receive
43. put terminals of the calibrator Set appropriate parameters on the standard multimeter to meet its best accuracy Perform 1 A DC linearity DC current AC current tests according to the tables I II III Deviations should not exceed specified limits Connect output terminals of the calibrator to the resistance shunt 100 mQ and counter Set output current 1 A AC frequency 1 kHz Perform frequency test according to the table IV Deviation should not exceed specified limit Connect input voltage terminals of calibrator s internal multimeter to the output terminals of the standard calibrator Set appropriate value of frequency and DC voltage according to the table V Perform multimeter test in points FREQUENCY 10000 Hz and 20 VDC Deviations should not exceed limits in the tables bellow Connect input current terminals of calibrator s internal multimeter to the output terminals of the standard calibrator Set appropriate value of DC current according to the table V Perform multimeter test on range 200 mA DC according to the table V Deviation should not exceed specified limit Connect output terminals of the calibrator to the resistance shunt 100 mQ and distortion meter Set output current 1 A AC and frequency 1000 Hz Check harmonic distortion of output signal It should not exceed 0 05 Operation manual 34 MCISI Current calibrator Powertek If calibrator is out of limits is in some points of this test appropriate function a
44. rent DC calibration is performed by setting 2 fixed points for all current ranges and for both polarities and Multimeter Meter calibration consists in calibration of ranges 20V 200mA and 10 kHz 7 2 Access to the calibration procedure Calibration password is required to access the calibration procedure Main menu General Interface Calibrator Meter Calibration Enter Password e Press Menu to open the Main menu 23 Operation manual MCISI Current calibrator Powertek Select the Calibration submenu and press the Select softkey Calibrator requests the entry of the calibration password Enter the correct calibration code using numeric keyboard and press ENTER If incorrect calibration code is entered an error message Bad calibration code appears on the display 7 3 Selection of calibration type After the calibration menu is displayed one of partial calibrations can be selected Use and v cursor keys to move the cursor through the list and confirm highlighted item by pressing Select Current RC Range 388mAac low 3BmR2 388mRac high C3BBmR iAac low 8 38 iAac high 1A 2Aac low 1A 2Aac high 2A SAac low 2A SAac high 5A 1BRac low 5A 1 Aac high 168A 128Aac low 1 10A 128Aac high 1 38A 128Rac low 2 10A X softkey The following data are shown the following example is valid for Current AC Current AC Range 388mAac low 38mR 5 329378181 Softkeys
45. rrent range 200mA Operation manual 18 MCI51 Current calibrator Powertek 6 Calibrator setup menu Main menu The 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 softkey If output terminals are connected they will be disconnected and the following display appears Main menu Interface Calibrator Meter Calibration Use A or v cursor key or the rotary knob to browse the menu options Press Select softkey or press in on the rotary knob to select highlighted item Press Exit softkey to leave the selected menu level New settings are retained when the calibrator is switched off The Main menu contains items General general instruments settings display keyboard time date Interface parameters of instruments remote control Calibrator parameters of signal generation Meter parameters of multimeter Calibration instruments calibration data 6 1 General Menu Submenu contains basic parameters of display and keyboard I Volume This parameter sets the beeper volume Cursor keys rotary knob or numeric keyboard allow setting the value in the range of 0 to 15 Press the Write softkey to set the beeper volume and return to the General menu 2 Brightness This parameter sets the display brightness Cursor keys rotary knob or numeric keyboard allow setting the value in the range of
46. s controling the internal multimeter Keyword Parameters MEASure CONFigure lt CPD gt VOL Tage CURRent MEAS This query returns value measured by the multimeter Calibrator returns the set values of amplitude and frequency using standard exponential format Example 7 456 V 50 1 Hz is returned as 7 456000e 000 5 010000e 001 Example MEAS Calibrator returns measured value CONF CPD VOLT CURR This command sets the function of internal multimeter 41 Operation manual MCISI Current calibrator Powertek If query is sent calibrator returns VOLT or CURR according to selected multimeter function Example CONF VOLT sets the multimeter to function voltage SOURce subsystem This subsystem allows controlling the individual functions of the calibrator Keyword Parameters SOURce MODE CAC CDC AMAC AMDC VDC VOLTage lt DNPD gt CAC CURREent lt DNPD gt FREQuency lt DNPD gt CDC CURREent lt DNPD gt AMAC CURREent lt DNPD gt FREQuency lt DNPD gt AMDC CURRent lt DNPD gt GNU lt DNPD gt GNI lt DNPD gt STEP lt DNPD gt SOUR MODE This command returns selected mode of the calibrator CAC CDC AMAC AMDC e CAC Current AC mode e CDC Current DC mode e AMAC Current AC amplifier mode e AMDC Current DC amplifier mode Example MODE SOUR CAC CURR DNPD Operation manual 42 MCISI Curr
47. s guery returns the contents of the Event Status Register and clears the register 51 Operation manual MCISI Current calibrator Powertek Event Status Enable setting ESE value This command programs the Event Status Enable register bits Parameter value is number in range 0 255 Event Status Enable reading ESE This query returns the Event Status Enable register Clear status CLS This command clears the Event Status Register and the Status Byte Register except the MAV bit and output queue Output line is not reset Operation manual 32 MCI51 Current calibrator Powertek 11 4 Standard Status Data Structures Calibrator meets standard protocol according to the standard IEEEA88 2 The protocol can be used for checking of error and status behavior of the calibrator It enables single wire transmitting of SRQ command The conditions on which SRQ signal local control request is sent can be set with parameters STB SRE SRE ESR ESE ESE a CLS PON URQ CME EXE DDE QYE 0 OPC ESR Event Status Register Read using ESR Output Queue Read using ESE Write using ESR ESE Event Status Enable Register QSS Summary Bit not used Read by Serial Poll Service Request 4 STB Status Byte Register Generation Read using STB a o Read using SRE Write using SRE 7 6 5 4 3 2 1 o
48. s not cover this range 6 Multimeter calibration Built in multimeter calibration consists of the calibration of 20 V voltage range 200 mA current range and 10 kHz frequency range External calibrator of higher precision class should be used to calibrate the built in multimeter Powertek MC142 If accurate external calibrator is not available an 81 2 digit multimeter is recommended for calibration a b 20 V voltage range calibration Select Meter from the calibration menu Press Select softkey to select the first calibration point 0 V Make short on calibrators input terminals METER INPUT V COM Main value presents the calibration point Leave value 0 000 and press Write softkey Select calibration point 20 V Connect external voltage 20 V DC to the calibrator input terminals METER INPUT V COM Exact value can be measured by parallel standard voltmeter Adjust main value on the display It should be equal to the value measured by standard multimeter Use lt gt v cursor keys rotary knob or numeric keyboard to adjust the main value Confirm new value by pressing Write softkey 20 mA DC current range calibration Select Meter from the calibration menu Press Select softkey to select the first calibration point 0 mA Make short on calibrators input terminals METER INPUT mA COM Main value presents the calibration point Leave value 0 000 and press Write softkey Select calibration point 200 mA C
49. s set up using the menu Calibrator e Information about sync mode only AC output C Meter s information section D Display softkeys The functions of these keys change during operation depends on actual display mode Colors on display Common rules are used for applied color of labels and values 1 Red color is applied when displayed value is measured by the calibrator 2 Blue color is applied for parameters or values which can be set up or modified directly from front panel keyboard or via Main menu 3 Black color is used for fix values labels notes parameters which cannot be modified and for other fix text with general information purpose 4 Meaning of display keys is always shown the lowest line If there is no description above display key the key is not active in selected function 11 Operation manual MCISI Current calibrator Powertek 3 2 Rear panel Rear panel includes meter input terminals ventilation holes power cord socket power line fuse power line voltage selector 115 230V fuse for internal multimeter interface connectors GPIB and RS232 and metal central ground terminal power line entry power line fuse power line switch fuse for internal multimeter F315mA 250V central ground terminal GPIB and RS 232 forced ventilation holes meter input terminals AAIDNBRWNe Operation manual 12 MCI51 Current calibrator Powertek 4 Control of the calibrator 4 1 Sel
50. 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 softkey and use lt gt v A cursor keys rotary knob or numeric keyboard to adjust the output voltage Confirm correctly set value by pressing Write softkey If you want to skip the calibration point whose calibration you have already entered press Exit softkey d Resistance shunt should be used on 2 5 10 and 30 A ranges if standard multimeter does not cover this range 3 DC current ranges calibration a Select Current DC from the calibration menu and confirm by pressing Select softkey Set the same function on external multimeter Operation manual MCISI Current calibrator Powertek b c d Follow the instructions provided on the calibrator s display and the DCI table to adjust the calibrator s output in the calibration points To adjust the calibrator s output in the calibration points press Select softkey and use lt gt V cursor keys rotary knob or numeric keyboard to adjust the output voltage Confirm correctly set value by pressing Write softkey If you want to skip the calibration point whose calibration you have already entered press Exit softkey Resistance shunt should be used on 2 5 10 and 30 A ranges 1f standard multimeter doe
51. the calibrator directly The following keys are provided function Source mode SOURCE Amplifier mode AMPLIFIER Voltage measurement VOLTAGE Current measurement CURRENT Output Operate Standby OPER 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 5 Power switch Turns instrument AC power ON and OFF 6 Air intake A cold air intake is used to bring relatively cool air into a calibrator 7 Current output Current outputs HI and LO terminals 8 Display keys There are five keys below the display whose meaning changes depending on the contents of the display These keys usually call up the local Menu units modes etc 9 Display 9 Operation manual MCISI Current calibrator Powertek A j 88 13 47 20 9 2012 B1 1 00000 8 j 9 0357 4 BA Gnd Off B2 Frequencu 58 008 Hz Coil Off Sunc Int ff B5 Input Umeter m C Amplitude d 8818 U Frequency 8 8888 Hz The display is divided to three horizontal sections A Upper information line e Selected function Source AC e Date and time e Remote control state Local keyboard Remote computer B Main area 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 1 2
52. urrent coil Sets the calibrator for connection the 25 turn or user current coil clamp ammeters calibration The coil multiplies the output current either 25 times or user times depending on set parameter By selecting an item from the list Coil Off Coil x25 and Coil user type of connected current coil can be selected 3 Coil user multiplier Sets number of turns if user current coil is connected Cursor keys rotary knob or numeric keyboard allow setting the value in the range of 10 to 50 Press the Write softkey to set the number of turns and return to the General menu 4 Synchronization Sets the external synchronization of the output signal By selecting an item from the list Internal internal synchronization Power line synchronization to the power supply or External synchronization to the meter input terminal type of frequency synchronization coil can be selected Note External synchronized signal has larger distortion than internal synchronized signal because of fine frequency tuning 6 4 Meter Menu Submenu contains parameters that affect measured signal I Function 21 Operation manual MCISI Current calibrator Powertek Sets the internal multimeter measuring function and range By selecting an item from the list Voltage AC DC voltage 0 20V and Current AC DC current 0 200mA Frequency of the measured signal is displayed always 6 5 Calibration Menu Calibration password is required to access the
53. v ae Gnd off Coil Off SOURCE AMPLIFIER Frequency 58 088 Hz a QD Ob o e 0e 8 0018 U B BB He 1 Cursor keys Using these keys the cursor can be controlled within allowed limits on the display The keyboard includes two keys 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 keys 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 keys marked A v allow the user to increase or decrease the number at the cursor key The central key is used to select value you want to change TAB 2 Rotary knob The rotary knob integrates several functions By turning the knob to the left or right the user can e step through the options e enter numeric values Operation manual 8 MCISI Current calibrator Powertek The function of the rotary knob can usually be performed by the cursor keys The central key is used to confirm the selection Select or change the function of the rotary knob value change or position change 3 Numeric keyboard The keyboard allows the entry of numeric values on the display ENTER key is used to confirm the selection CANCEL key can be used to cancel the entry 4 Function keys Function keys can be used to call up the functions of
54. value of the output current expressed in A If query is sent calibrator returns the value of output current using standard exponential format Example 11 012 A is returned as 1 101200e 001 Example Current 23 05A AMAC CURR 23 05 Note Command switches the calibrator in AMAC mode SOUR AMAC FREQ lt DNPD gt This command sets the frequency in AMAC mode lt DNPD gt Parameter represents the value of frequency expressed in Hz If query is sent calibrator returns the value of frequency using standard exponential format Example 50Hz is returned as 5 000000e 001 Example Frequency 60Hz AMAC FREQ 60 Notes Command switches the calibrator in AMAC mode SOUR AMDC CURR lt DNPD gt This command sets the output current value in AMDC mode lt DNPD gt Parameter represents the value of the output current expressed in A If query is sent calibrator returns the value of output current using standard exponential format Example 11 012 A is returned as 1 101200e 001 Example Current 23 05A AMDC CURR 23 05 Note Command switches the calibrator in AMDC mode SOUR GNU DNPD This command sets the gain value in transconductance amplifier mode AMAC and AMDC Operation manual 44 MCISI Current calibrator Powertek lt DNPD gt Parameter represents the value of the gain expressed in A V If query is sent calibrator returns the value of output current using standard exponential format Ex

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