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Manual - Berkeley Nucleonics Corporation

1. _ y _ a j no 1 000000V 10 20K 0 06 0 03 TO 20 50K 0 12 0 05 750 000V 10 50K 100K 0 60 0 08 100K 300K 4 00 0 50 o0 j _ 1 000000A 1 uV 0 30 0 04 ACI mores 10 5K 0 10 0 04 11 3 5 3 000000A 10 uV 0 35 0 06 10 5K 0 15 0 06 0 1 of range For 50 KHz to 100 KHz add 0 13 of range 10 750Vac range is limited to 100 KHz 11 Specifications are for sine wave input gt 5 of range When the inputs are from 1 to 5 of range and lt 50 KHz add the additional error for 0 1 of range For 50 KHz to 100 KHz add 0 13 of range 135 B General Specifications item Limitation amp description Power Supply 100V 120V 220V 240V 10 Power Line Frequency 50 60 Hz 10 Power Consumption 25 VA peak 16 W average Operating Temperature Operating Humidity 5 Cc to 40 Maximum relative humidity 80 for temperature up to 31 C decreasing linearly to 50 relative humidity at 40 C Storage Temperature 40 C to 70 Operating Altitude Up to 2000m Bench Dimensions WxHxD 224mm x 113mm x 373mm Weight 4 36 kg Safety IEC61010 1 2001 EN61010 1 2001 2 Edition UL61010 1 2004 Measurement CAT IT 600V CAT I 1000V Pollution Degree 2 EMC EN61326 1997 A1 1998 A2 2001 A3 2003 EMI CISPR 11 1997 A1 1999 A2 2002 Class B IEC61000 3 2 2000 IEC61000 3 3 1994 A1 2001 EMS IEC61000 4 2 1995 A1 1998 A2 2000 IEC61000
2. 223 Too much data A character string was too long 224 Illegal parameter value A discrete parameter was received which was not a valid choice for the command 230 Data Stale A FETCh Command was received but the memory was empty 350 Too many errors The error queue is full 410 Query INTERRUPTED A command was received which sends data to the output buffer but the output buffer contained data from a previous command 420 Query UNTERMINATED The multimeter was addressed to talk i e to send data over the interface but a command has not been received which send data to the output buffer 430 Query DEADLOCKED A command was received which generates too much data to fit in the output buffer and input buffer is also full Command execution continues but all data is lost 440 Query UNTERMINATED after indefinite response The IDN Command must be the last query command within a command string 521 Input buffer overflow 522 Output buffer overflow 130 531 Insufficient memory There is not enough memory to store the requested number of readings in internal memory using the INITiate command The product of the Sample count SAMPle COUNt and the trigger count TRIGger COUNT must not exceed 512 readings e 532 Cannot achieve requested resolution The multimeter cannot achieve the requested measurement resolution You may have specified an invalid resolution in the CONFigure or MEASure
3. 1201 Berkeley Nuclaonics Corp ae CTION SETUP RANGE ACI PERIOD reours IA TE RAMS B FRONT pk 5 BEL Sor e ES CATH aay d User s Manual Printed Date 04 2008 Table of Contents 1 GENERAL INFORMATION eeeeeeeeeeesssessssssssoeccccccccccesssesesseseesssssssceccccecceccesssssesssssee 6 be FEATURE OVERVIEW nyiaran E A E N 6 1 2 WARRANTY INFORMATION seisein ia E a E aa 7 13 PRECAUTION OF OPERATION arcieri ren a A N EE 8 Leg UPKEEP OF ZOD ia chal etl A E Aa pedestal 9 LS SARETYINEORMATION sasra a n heaoeedee es ie atoG 9 150 SYMBOLS AND TERMS vegeictei secs vinta aan ae gots atria eae ered 10 PP gum 0S 21 21 enorme cel a eRe A eR Tes Ras RE A Te 11 1 8 OPTIONS AND ACCESSORIES acredi aiarar accel E a ei aa 12 ged A20 FSDIMENS ION oeo nan E A E oua hae 13 Z OVERVIEW oe E O 14 2 1 SETTING UP YOUR 1201 DIGITAL MULTIMETER noadiaitnuntcanienS ose tetan eeantalnentsates 14 2 1 1 To adjust the handle 14 2 1 2 TO connect the POW F seseeeeeerrserrrririsssssserrrrrrrrreeesssersssss I 2 1 2 1 To convert the voltag Enoe a E 17 2 1 2 2 To change the fUSe eesserrereessrrrrersssrrrrrersesrrrrrsssssrrrrrrerssrrens 20 2 1 3 Factory Default When Power ON u cccccccccccceccccc cece eeececeeeeens 24 Dig Ue IE Saree cca eee ee aca tet cs aes fate a aces eh ce anlag an eae 26 2 3 1201 FUNCTION INTRODUCTION oc2cccccoshitar eneulany dees p E TEE 26 231 INe FR 6 8S c Re en
4. CHANNEL Use lt and gt to move through the digits and and V to increase or decrease the numbers to the desired channel number Press ENTER to close the channel To open all channels simply press ENTER on OPEN ALL option Press SHIFT DIGITS to scan 101 The locations of the buttons are shown with red rectangle frames in Figure 4 31 F z a ih Vie i D f a mi il T F ih 1 Ii F g hee at j J a d a aTi A Figure 4 31 4 4 6 Stepping Step Stepping is scanning with a specified time delay between taking input signal through the defined channels X Note Setting range of scanner card is only limited on DCV DCI ACV ACI and Resistance functions How to program each channel with measurement function Press CONFIG SHIFT FILTER for scanning configuration Use lt and gt to scroll through submenus Press ENTER on SET SCAN CHA submenu Use lt and to switch from channel 1 to channel 10 and use Aand V to switch among the measurement functions Leave an unused channel with a blank space Press ENTER when ten channels are all defined How to configure scan count scan interval and store measurement readings Press CONFIG SHIFT FILTER for scanning configuration Use lt and gt buttons to scroll through submenus Press ENTER to select OPERATION submenu Use lt and gt to switch among scan count COUNT scan i
5. Defaults The factory default is 20 Hz Medium Users can select their filter type as they wish when setting bandwidth value The selection is stored in a volatile memory and the default setting will be restored when the meter is power off Time Bandwidth AC Filter seconds per reading 3 Hz 300 KHz Slow 7 20 Hz 300 KHz Medium 1 200 Hz 300 KHz Fast 0 1 Table 4 2 How to set AC Filter in AC measurements User can set the AC Filter either through the front panel operation or through the remote interface operation 55 Front Panel Operation Press CONFIG ACV button Use lt and gt buttons to locate BAND WIDTH submenu and then press ENTER to select it Look for the desired bandwidth using lt and gt buttons Then press ENTER on your selection There are three options 3Hz 20Hz and 200Hz The locations of these buttons are shown with red rectangle frames in Figure 4 2 CONFIG On li i ry L r if A li Ti ad a wi E o caTI bimi 1 gami piii PREV NEXT EAER Figure 4 2 Remote Interface Operation From your PC terminal use the following command to specify the filter type DETector BANDwidth 3 20 200 MIN MAX 4 1 2 2 Digital Filter Definition 1201 uses an averaging digital filter to yield a reading for display from a specified number of measurement readings in the past The past me
6. Remote Interface Operation Use the following command to make a RATIO measurement CONFigure VOLTage DC RATio lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF 4 3 2 Percent Definition This mathematical function calculates the ratio of a measurement reading to a specified target value as the form of percentage The calculation formula is shown below Input Reading Percent _ 00 Target Yalue The specified target value is store in a volatile memory and will be cleared after the meter has been turned off or a remote interface reset How to use Percent function There are two ways to make a percent measurement Through the front panel operation or through the remote interface operation Front Panel Operation To specify a target value user needs to configure Percent function by pressing CONFIG then use lt and gt to move through the digits 80 and and V buttons to increase or decrease the numbers to a desired target value Press ENTER to set the value Press to activate this function And then observe the calculated percent value on the display as shown as Figure 4 15 X Note Press again to disable this function The MATH annunciator on the display indicates the state of a mathematical feature PREV NEXT Figure 4 15 Remote Interface Operation Use the following commands to enable and configure Percent function CALCulate FUNCtion PERCent CALCulate S
7. lt va ue gt MINimum MAXimum Set the B coefficient SENSe TEMPerature SPRTD BX MINimum MAXimum Query the B coefficient SENSe TEMPerature SPRTD CX lt va ue gt MINimum MAXimum Set the C coefficient SENSe TEMPerature SPRTD CX MINimum MAXimum Query the C coefficient SENSe TEMPerature SPRTD DX lt va ue gt MINimum MAXimum Set the D coefficient SENSe TEMPerature SPRTD DX MINimum MAXimum Query the D coefficient SENSe TEMPerature TRANsducer FRTD Set the RTD Measurement to 4 Wire SENSe TEMPerature TRANsducer RTD Set the RTD Measurement to 2 Wire SENSe lt function gt NPLCycles 0 02 0 1 1 10 MINimum MAXimum Set the integration time in number of power line cycles for the selected function This command is valid only for DCV DCI 2 wire ohms and 4 wire ohms SENSe lt function gt NPLCycles MINimum MAXimum Query the integration time for the selected function SENSe FREQuency APERture 0 01 0 1 1 MINimum MAXimum Set the gate time or aperture time for frequency function Specify 10 ms 4 5 digits 100 ms default 5 5 digits or 1 second 6 5 digits 149 SENSe FREQuency APERture MINimum MAXimum Query the gate time or aperture time for frequency function SENSe PERiod APERture 0 01 0 1 1 MINimum MAXimum Set the gate time or aperture time for period function Specify 10 ms 4 5 digits 100 ms default 5 5 digits or 1 second 6 5 digits SEN
8. Base value input signal Offset value When the Auto Zero or Auto Gain is enabled the meter takes an offset reading for each subsequent measurement However when Auto Zero or Auto Gain is disabled the meter only takes one offset reading each time when you change the function settings User can set PERIOD to change the time interval for taking an offset reading 52 Defaults The default settings for Auto Zero and Auto Gain are enabled The user selected values for Auto Zero and Auto Gain are stored in a volatile memory and the default settings will be restored when the meter is power off How to set Auto Zero and Auto Gain You can change the Auto Zero and Auto Gain setting through the front panel or through the remote interface operation Front Panel Operation The following steps show how to set Auto Zero and Auto Gain directly through the front panel Be aware that Auto Zero setting is always affected by the resolution setting Whenever the resolution is altered Auto Zero may be changed accordingly The relation between resolution and Auto Zero is shown in Table 4 1 Press MENU and then ENTER on SET ADC If SET ADC is not shown on the display use lt and gt buttons to locate it Press ENTER on ZERO or GAIN Again use lt and gt buttons to locate it if it is not shown on the display Press ENTER on AUTO ZERO or AUTO GAIN option and then use lt and gt to the ON or OFF Press ENTER by your
9. Please consult your local service representative for further assistance The contents of this manual may be amended by the manufacturer without notice Never dismantle the equipment by any unauthorized personnel or equipment may be damaged The equipment has been strictly tested for quality before delivery from our factory However this equipment must not be used in dangerous situations where damage may result This product should be placed in a safe area in case of unpredictable personnel use The rear protective conduct terminal needs to be connected to the actual earth ground or electric shock may occur The patent and related documents for the equipment belong to BERKELEY NUCLEONICS CORPORATION CORP and they aren t allowed to be used by others without permission 1 4 Upkeep of 1201 Although 1201 multimeter is very durable and weather resistant care should be taken not to expose it to severe impact or pressure Keep 1201 far from water and damp environment Calibration will be taken every year Please contact with your local service representative for more information If the incorrect display or abnormal beeps occurred you should stop using the equipment at once Do not use the Meter around explosive gas or inflammable vapor Wipe the surface of 1201 multimeter with a piece of dry and clean cloth 1 5 Safety Information A Warning Please read through the following safety information before
10. and use and V buttons to increase or decrease the numbers to a desired value Press ENTER to set the value The locations of the buttons are shown with red rectangle frames in Figure 4 17 X Note Press NULL again to disable this feature The MATH anunnciator on the display indicates the state of a mathematical feature 83 PREV NEXT _ Ji i ons m t Figure 4 17 The Remote Interface Operation You can use the following commands on your PC terminal to make a null measurement CALCulate FUNCtion NULL CALCulate STATe OFF ON CALCulate STATe CALCulate NULL OFFSet lt value gt MAXimum MINimum 4 3 5 Limits Test The limits testing operation allows user to adjust a maximal and a minimal limit values The multimeter beeps and an HI or LO message will be shown when the reading exceeds the upper or lower limit respectively Users can specify the limit values and the values are stored in a volatile memory The default values for both upper and lower limits are 0 This function is available to all except continuity and diode measurements How to set the limits You can set the limits or make a limit testing either through the front panel or the remote interface operation Front Panel Operation To set the limits user needs to configure the LIMITS math function by pressing CONFIG SHIFT RATIO and then use lt and gt gt to locate either lower limit MIN or upper
11. annunciators for a better view A maximum 13 characters are 91 allowed for upper row dot matrix display and a maximum 16 characters are allowed for lower row dot matrix display as shown on Figure 4 25 User has an option to turn off the display for a faster measurement without waiting for display or when the measurement is done through the remote interface operations on their PC terminal FILT GW EXT Figure 4 25 When the display is turned off an OFF will be lit at the lower right corner of the display screen This doesn t mean the display is POWER OFF but only that the measurement readings will not be sent to the display This option will accelerate the measurement process because there is no I O delay But turning off the display will not affect the messages displayed from the RECALL MENU and CONFIG operations User can send a message through the remote interface from their PC terminal to the lower row display and will substitute the original display Default The display default is ON The On Off selection made by user is stored in a volatile memory and the default ON will be restored when the meter is power off How to control the display You can control the display through the front panel operation or through the remote interface operation The remote interface operation has higher priority over the front panel operation Front Panel Operation Use the following steps to control the display Pre
12. many commands For example consider the following command VOLTage DC RANGe lt range gt MINimum MAXimum 138 Instead of selecting a specific voltage range you can substitute MIN to set the range to its minimum value or MAX to set the range to its maximum value Querying Parameter Settings You can query the current value of most parameters by adding a question mark to the command For example the following command sets the sample count to 10 readings SAMP COUN 10 You can query the sample count by executing SAMP COUN You can also query the minimum or maximum count allowed as follows SAMP COUN MIN SAMP COUN MAX X Note If you send two query commands without reading the response from the first and then attempt to read the second response you may receive some data from the first response followed by the complete second response To avoid this do not send a query command without reading the response When you cannot avoid this situation send a device clear before sending the second query command SCPI Command Terminators A command string sent to the multimeter must terminate with a lt new line gt character The IEEE 488 EOI end or identify message is interpreted as a lt new line gt character and can be used to terminate a command string in place of a lt new line gt character A lt carriage return gt followed by a lt new line gt is also accepted Command string termination wil
13. 17 112 vBus Red Floating GND GND Table 5 1 If you disable the USB interface the Pass Fail output function will enable automatically Please follow the procedure below to enable disable this function Procedure MENU INTERFACE USB ENABLE DISABLE Or you can do this by the other way Procedure CONFIG SHIFT RATIO OUTPUT ENALBLE DISABLE A Pass Fail signal output You must use the GPIB interface for remote Warning You can t use the USB interface if you want to enable the control Please disconnect the USB cable from you multimeter The signal from the USB cable may make the Pass Fail signal output abnormal 5 2 Setting Up For Remote Interface User may use the 1201 application developed by BERKELEY NUCLEONICS CORPORATION to remotely control the multimeter through either USB or GBIP interface How to set up for USB interface The USB cord should be connected well between 1201 and your PC Install the 1201 application in your PC and execute the program Click Tool tab for Command Control then type in your command The icons and buttons are shown with red rectangle frames in Figures 5 1 5 2 and 5 3 113 X Note The icons pictures and words will be changed or edited with different versions without informing Command Control 1201_AP BNC_TOOL Figure 5 1 Figure 5 2 Figure 5 3 How to set up for GPIB interface Insert GPIB interface card into the interface slot on the rear pane
14. 4 3 2002 IEC61000 4 4 2004 IEC61000 4 5 1995 A1 2000 IEC61000 4 6 1996 A1 2000 IEC61000 4 8 1993 A1 2000 IEC61000 4 11 1994 A1 2000 136 C Remote Interface Reference C 1 An Introduction to the SCPI Language SCPI Standard Commands for Programmable Instruments is an ASCII based instrument command language designed for test and measurement instruments Refer to Simplified Programming Overview for an introduction to the basic techniques used to program the multimeter over the remote interface SCPI commands are based on a hierarchical structure also Known as a tree system In this system associated commands are grouped together under a common node or root thus forming subsystems A portion of the SENSe subsystem is shown below to illustrate the tree system SENSe VOLTage DC RANGe lt range gt MINimum MAXimum VOLTage DC RANGe MINimum MAXimum FREQuency VOLTage RANGe lt range gt MINimum MAXimum FREQuency VOLTage RANGe MINimum MAXimum DETector BANDwidth 3 20 200 MINimum MAXimum DETector BANDwidth MINimum MAXimum ZERO AUTO OFF ONCE ON ZERO AUTO SENSe is the root keyword of the command VOLTage and FREQuency are second level keywords and DC and VOLTage are third level 137 keywords A colon separates a command keyword from a lower level keyword Command Format Used in This Manual The format used to show commands in this manual is shown below VOLTage DC RAN
15. CALCulate MXB MBFactor MINimum MAXimum 4 3 7 dB dBm A dB Definition The dB feature takes a DC or AC voltage measurement and displays it in decibel unit in correspondence to a relative reference value The calculation of dB is listed below dB 20 x log g or dB Input signal in dBm relative value in dBm X NOTE The V is the input signal and the V is the relative reference The dB measurement is applied to DC and AC voltage only The relative value is adjustable and is stored in a volatile memory The range for the relative value is between 0 dBm and 200 dBm How to set the relative value User can either manually select a number for the relative reference or let the multimeter take the first reading 0 dB Front Panel Operation Press CONFIG SHIFT NULL buttons and then use lt and gt to move through the digits and A and buttons to increase or decrease the numbers to your desired value Press ENTER to set the value The locations of the buttons are shown with red rectangle frames in Figure 4 21 PREV NEXT aira Figure 4 21 How to make a dB measurement Select the measurement function by pressing one of DCV and ACV buttons Enable the dB operation by pressing SHIFT NULL buttons After enabling the dB operation user can set or alter the dB relative value as mentioned above 88 Observe the displayed reading Figure 4 22 shows the locations of these buttons with
16. CAPABILITIES Multiplex one of ten 2 pole or one of five 4 pole signals into DMM INPUTS Maximum Signal Level 99 DC Signals 110V DC 1A switched 30VA maximum resistive load AC Signals 125V AC rms or 175V AC peak 100kKHz maximum 1A switched 62 5VA maximum resistive load Contact Life gt 100000 operations at maximum signal level gt 100000000 operations cold switching Contact Resistance lt 1ohm at end of contact life Actuation Time 5ms maximum on off Contact Potential lt 500nV typical per contact 1uV max lt 500nV typical per contact pair 1uV max Connector Type Screw terminal 22 AWG wire size Isolation Between Any Two Terminals gt 10 Gohm lt 75pF Isolation Between Any Terminal and Earth gt 10 Gohm lt 150pF Common Mode Voltage 350V peak between any terminal and earth Maximum Voltage Between Any Two Terminals 200V peak Maximum Voltage Between Any Terminal and 1201 Input LO 200V peak ENVIRONMENTAL Meets all 1201 environmental specifications 1201 opt01 Scanner Card Configuration amp Speed List T amp a m m a Se iad h r Chance 1 H Channel 2 LO rl Channe 3 LEJ HI Chane 4 annel LEO F HI L H7 LG Channel Chan B Lanne han 19 Channeli 0 Speed of Scanner Card Measurement AutoZero OFF AutoGain OFF AutoRange OFF Scan Timer 0 60Hz Single Take Time with 2000 Readings sec rate ch s 74 unciono estas oo 68 Slow 4 5 am
17. Default parameters are shown in bold italic 116 SENSe FUNCtion VOLTage DC FUNCtion VOLTage DC RATio FUNCtion VOLTage AC FUNCtion CURRent DC FUNCtion CURRent AC FUNCtion RESistance 2 wire Q FUNCtion FRESistance 4 wire Q FUNCtion FREQuency FUNCtion PERiod FUNCtion CONTinuity FUNCtion DIODe FUNCtion TCOuple FUNCtion TEMPerature FUNCtion SENSe VOLTage DC RANGe lt range gt MINimum MAXimum VOLTage DC RANGe MINimum MAXimum VOLTage AC RANGe lt range gt MINimum MAXimum VOLTage AC RANGe MINimum MAXimum CURRent DC RANGe lt range gt MINimum MAXimum CURRent DC RANGe MINimum MAXimum CURRent AC RANGe lt range gt MINimum MAXimum CURRent AC RANGe MINimum MAXimum RESistance RANGe lt range gt MINimum MAXimum RESistance RANGe MINimum MAXimum FRESistance RANGe lt range gt MINimum MAXimum FRESistance RANGe MINimum MAXimum FREQuency VOLTage RANGe lt range gt MINimum MAXimum FREQuency VOLTage RANGe MINimum MAXimum PERiod VOLTage RANGe lt range gt MINimum MAXimum PERiod VOLTage RANGe MINimum MAXimum SENSe VOLTage DC RANGe AUTO OFF ON VOLTage DC RANGe AUTO 117 VOLTage AC RANGe AUTO OFF ON VOLTage AC RANGe AUTO CURRent DC RANGe AUTO OFF ON CURRent DC RANGeAUTO CURRent AC RANGe AUTO OFF ON CURRent AC RANGe AUTO RESistance RANGe AUTO OFF ON RESistance RANGe AUTO FRESistance
18. If Rem send reset command RST reset 1201 stat viWrite sesn RST 4 ret If stat lt VI_SUCCESS Then MsgBox System command error RST vbExclamation 1201 multimeter device test stat viClose fList Exit Sub End If Rem send Clear command CLS Clear 1201 status register stat viWrite sesn CLS 4 ret If stat lt VI_SUCCESS Then MsgBox System command error CLS vbExclamation 1201 multimeter device test stat viClose fList Exit Sub End If Rem send measure command Set to 0 1 volt dc range stat viWrite sesn meas volt DC 0 1 0 01 22 ret If stat lt VI_SUCCESS Then MsgBox System command error meas volt dc vbExclamation 1201 multimeter device test stat viClose fList Exit Sub End If Rem fetch the measure data stat viRead sesn readin 64 ret If stat lt VI_SUCCESS Then MsgBox Read in data error vbExclamation 1201 multimeter device test stat viClose fList Exit Sub End If Debug Print Rdg readin Rem set to local mode stat viWrite sesn system local 12 ret If stat lt VI_SUCCESS Then MsgBox System command error system local vbExclamation 1201 multimeter device test stat viClose fList Exit Sub End If stat viClose sesn stat viClose fList stat viClose dfltRM MsgBox End of Job End Sub Using CONFigure with a Math Operation The following example uses CONFigure with the dBm math operation The C
19. If you are using the thermocouple the options are type E J K N R S and T After selecting your thermocouple type you need to configure the reference junction also Typically each thermocouple card uses one reference junction If the junction type is simulated the defined simulated junction temperature is used If the junction type is real you need to close that channel from the scanner card before acquiring the temperature Also you must enter an offset voltage for the selected reference junction How to set up thermocouple You can set up the thermocouple configuration either through the front panel operation or through the remote interface operation Front Panel Operation Press CONFIG and then SHIFT TEMP to go to the thermocouple configuration menu Use lt and gt to locate TYPE submenu press ENTER to select it Then again use lt and gt to locate the right thermocouple type for you press ENTER on your selection To configure the reference junction use the same step to go to the thermocouple configuration submenu Use lt and gt to locate RJUNCTION submenu and then press ENTER The options are SIMULATED and REAL Selecting SIMULATED allows you to set a specific value to be a default temperature Selecting REAL allows you to set an offset voltage Use lt and gt to move through the digits and A and V to change the numbers to a desired value Press ENTER to input a specific valu
20. Overtead Ne Status Byte 9 Ohms Overload Summary Register Enable Register Not Used 0 Not Used 17 Limit Test Fail LO Not Used 12 Limit Test Fail HI Not Used i Ouestonable Data Message Available 15 Standard Event STAT QUES EVEN STAT QUES ENAB lt value 5 STAT LWES ENAH x Standard Event a Event Regele Enable Register Output Buffer TEE y Mil ESE evitis ESET 124 STATUS REPORTING Commands SYSTem ERRor STATus QUEStionable ENABle lt enable value gt QUEStionable ENABle QUEStionable EVENt STATus PRESet CLS ESE lt enable value gt ESE ESR OPC OPC PSC 0 1 PSC SRE lt enable value gt SRE STB Other Interface Commands SYSTem LOCal SYSTem REMote IEEE 488 2 COMMON Commands PCES ESE lt enable value gt ESE ESR IDN OPC OPC PSC 0 1 PSC 125 RST SRE lt enable value gt SRE STB TRG 126 6 Error Messages Errors are retrieved in first in first out FIFO order The first error returned is the first error that was stored When user has read all errors from the queue the ERROR annunciator turns off 1201 beeps once each time an error occurs Should more than 20 errors have existed the last error stored in the queue the most recent error is replaced with 350 Too many errors No additional errors are saved until you remove errors from the queue the multimeter responds with 0 No e
21. PviSetAttribute_usb unsigned long vi unsigned long viAttr unsigned long attrstat PviOpenDefaultRM_usb signed long __stdcall unsigned long GetProcAddress hUSBTMCLIB LPCSTR viOpenDefaultRM PviFindRsrc_usb signed long __stdcall unsigned long char unsigned long unsigned long char GetProcAddress hUSBTMCLIB LPCSTR viFindRsrc PviClose_usb signed long __stdcall unsigned long GetProcAddress hUSBTMCLIB LPCSTR viClose PviOpen_usb signed long __ stdcall unsigned long char unsigned long unsigned long unsigned long GetProcAddress hUSBTMCLIB LPCSTR viOpen PviWrite_usb signed long __stdcall unsigned long unsigned char unsigned long unsigned long GetProcAddress hUSBTMCLIB LPCSTR viWrite PviRead_usb signed long __stdcall unsigned long unsigned char unsigned long unsigned long GetProcAddress hUSBTMCLIB LPCSTR viRead PviSetAttribute_usb signed long __stdcall unsigned long unsigned long unsigned long GetProcAddress hUSBTMCLIB LPCSTR viSetAttribute 173 if PviOpenDefaultRM_usb NULL PviFindRsrc_usb NULL PviClose_usb NULL PviOpen_usb NULL PviWrite_usb NULL PviRead_usb NULL PviSetAttribute_usb NULL FreeLibrary HUSBTMCLIB hUSBTMCLIB NULL MessageBox NULL NIVISA for USBTMC library not ready 1201 multimeter device test MB_OK return printf n Start C E
22. READ Command The READ Command changes the state of the trigger system from the idle state to the wait for trigger state When the specified trigger condition requirements are met after the multimeter receives the READ command the measurement will be initiated The results are sent to the output buffer right away You must enter the reading data into your bus controller or the multimeter will stop making measurements when the output buffer fills Readings are not stored in the multimeter s internal memory when using the READ Command Using the READ Command has a similar effect as using the INITiate command followed immediately by the FETCh command except readings are not buffered internally The INITiate and FETCh Commands These two commands provide the lowest level of control of measurement triggering and reading retrieval but offer the most flexibility After you have configured the multimeter use INITiate command to change the state of the triggering system from the idle state to the wait for trigger state The multimeter will start the measurements when the specified trigger condition requirements are met after it receives the INITiate command The results are sent to the internal memory and stored until you are ready to read them The FETCh command sends the data in the multimeter s internal memory to the output buffer where you can read them into your bus controller The SENSe Commands X NOTE
23. a command from your PC to the multimeter to generate an event For using software trigger use the following command from your PC terminal to set trigger source TRIGger SOURce BUS By internal trigger The internal trigger is the default trigger mode for the Remote Interface Operation In the internal trigger mode a trigger signal will be issued whenever the multimeter is in the wait for trigger state To set the internal trigger use the following command from your PC terminal TRIGger SOURce IMMediate 4 2 3 Trigger Setting In 1201 user can specify a variety of trigger settings including the 73 number of samples per trigger the number of triggers per event reading hold and the trigger delay for their measurements A Number of samples on each trigger By default the multimeter takes only one reading on each trigger but you can instruct the multimeter to take specific number up to 50000 of readings each time it receives a trigger The user s input setting is stored in a volatile memory which will be cleared after the meter has been turned off and the default value will be restored You can set the number of samples on each trigger through front panel or the remote interface Front Panel Operation Press MENU button and locate TRIG submenu by pressing lt and gt buttons Press ENTER to choose TRIG option Again locate N SAMPLE submenu using lt and gt buttons and then press ENTER to select it Then
24. cae ee Oe eT ee NE eee 26 BLS same ff ot BI 8 a ae ee EOI RS ORR TRE ere ea ne Sr Ie TT ee 30 2 3 2 1 Annunciators at Upper Sid s cea 31 2 3 2 2 ANnnunciators at RIONE Side ooaensa ne E E 31 Diigo fo eam MERA a lt RMP RE A E A N 32 3 BASIC MEASUREMENT FUNCTION 0 cssccsscssssccssscsssccssscssscssscsssccscecesees 34 3 1 VOLTAGE MEASUREMENTS DC amp AQ ie coco entevs 34 3 2 CURRENT MEASUREMENTS DC amp AC uuu cccccccccccectcccseesseseessssessssnsccssenssnacenseas 36 3 3 RESISTANCE MEASUREMENTS 2 amp 4 WIRE ccccccccccccccccccsssesssssesessssssseeseseeeees 38 3 4 FREQUENCY amp PERIOD MEASUREMENTS ccsecccceeccccseccencecuccecseccecaecenseceeeaes 40 335 CONTINUITY MEASUREMENT Sic teSeta tees encase nai ancl can neat nate 4 3 6 DIODE MEASUREMENTS sev cecsieetectnciietenenche seat nadetscuessudacts a e iaaa eea 42 3 7 TEMPERATURE MEASUREMENTS cccesssscccccecsessseesseeeeeeceeesseeeeeeceeeesseeeeneeseeeeeees 43 3 7 1 Thermocouple Measurements eerren 44 SJ eZ IRL Measurement S asenna a aa a andi sscateadiaeshaians 45 JFL 2 Wire RTD MeasurementS sirsie A R 45 ISa SNIS RID Measurements oousi uuo 47 JAL AW re RTD Measurement Scare en RERA 49 4 FRONT PANEL OPERATIONG ccssccssscsssseccsssscsssscssscesscccssecessssecesssesssecesesees 52 4 1 MEASUREMENT CONFIGURATION c ccccccsessssseeeecescecseessseeeeeeeseessseeeeeeseseesensaaes 52 4 1 1 Set ADC Auto Zero a
25. choice The locations of these buttons are shown with red rectangle frames in Figure 4 1 Procedures MENU SET ADC ZERO AUTO ZERO ON OFF MENU SET ADC GAIN AUTO GAIN ON OFF Auto Auto Integration Zero Gain Time PLC Resolution Fast 4 digits Off Off 0 02 53 Table 4 1 X Note To change resolution refer to Section 4 1 3 Resolution Setting in this chapter Figure 4 1 Remote Interface Operation To set Auto Zero and Auto Gain through the remote interface use the following commands SENSe ZERO AUTO OFF ONCE ON SENSe GAIN AUTO OFF ONCE ON The OFF and ONCE parameters have a similar effect Auto Zero OFF or Auto Gain OFF doesn t issue a new offset measurement However Auto Zero ONCE or Auto Gain ONCE issues an immediate offset measurement 54 4 1 2 Filter Filter is used to remove noises in measurement readings 1201 is equipped with two types of filters AC filter and digital filter AC filter is for AC measurements only It also affects the speed of the multimeter to yield a measurement reading Digital filter further stabilizes the measurement readings by averaging Both of them are described in detail in the subsequent sections respectively 4 1 2 1 AC Filter Definition User is allowed to set the bandwidth for selecting one of the three AC filters Slow Medium and Fast in order to achieve either higher accuracy in low frequency measurements or faster AC settling time
26. command 540 Cannot use overload as math reference The multimeter cannot store an overload reading 9 90000000E 37 as the math reference for null or dB measurements The math state is turned off as a result of this condition e 550 Command not allowed in local The multimeter received a READ Command while in the local mode 131 Appendix This appendix contains the performance specifications of the 1201 It covers the AC DC Resistance Temperature and Frequency Period characteristics under a variety of conditions It also contains the general characteristics and accuracy calculations for your convenience A lot of efforts are made to make sure these specifications serve your needs for production engineering and or research purposes All specification applies to 1201 unless noted otherwise A Specification List DC Characteristics 1 Accuracy of reading of range 2 Range Resolution Resistance 23 C 5 C 100 0000 mV gt 10GQ 0 0050 0 0035 1 000000 V gt 10GQ 0 0040 0 0007 DC Woltaue 10 00000 V gt 10GQ 0 0035 0 0005 100 0000 V 100 uV 10MQ 0 0045 0 0006 1000 000 V 1 uV 10MQ 0 0045 0 0010 1 Specifications are for 6 1 2 digits and two hours warm up 2 20 over range on all ranges except 1000Vdc and 3 A range 3 a Using continuous integrating A D converter b Input bias current less than 30 pA at 25 C c Input protection 100 V all range 132 Shunt 1 Year Range Reso
27. functions in 1201 You will learn how to use your 1201 multimeter to measure voltage current resistance frequency period continuity diode and temperature in this chapter 3 1 Voltage Measurements DC amp AC The ranges for DC voltage measurements in 1201 are 100mV iV 10V 100V and 1000V For AC voltage measurements the ranges are 100mV to 750V AC Coupled TRMS or 1000V peak Figures 3 1 and 3 2 show the locations of the buttons needed and message display for voltage measurement Figure 3 3 shows the location of the input terminals on the rear panel A Warning Do not apply more than 1000V peak to the multimeter Applying excess voltage may damage your meter or cause possible electric shock or personal injury X Note To eliminate the thermal EMFs due to the differences between two metals use copper leads to connect your source signal to the meter How to measure voltage Selects input signal connections on front or rear panel Connect the test leads to the terminals as shown in Figure 3 1 DC or Figure 3 2 AC 8 Set RESOLUTION of DCV Refer to 4 1 3 BAND WIDTH of ACV Refer to 4 1 2 1 or skip this step if default is to be used 4 Press DCV or ACV button for DC or AC voltage measuring Select the auto range function by pressing AUTO button on the front panel or use A V buttons to select desired range 34 Connect test leads to your source signal and observe the reading shown on the display If t
28. locate your sensor type Press ENTER to select your desired sensor type Choosing USER takes you to a menu where you can specify factors used in the calculation equation to obtain the temperature Use lt and gt to move through the digits and A and V to change the numbers to a desired value Press ENTER to set the value Choosing SPRTD takes you to a menu where you can specify the seven coefficients that are used to determine the temperature Use lt and gt to move through the digits and A and V to change the numbers to a desired value Press ENTER to set the value Remote Interface Operation Use the following commands to set up the RTD configuration SENSe TEMPerature RTD 1T YPE PT100 D100 F100 PT385 PT3916 USER SPRID NTCT SENSe UNIT Cel Far K SENSe UNIT SENSe TEMPerature RTD RZERo lt va ue gt MINimum MAXimum SENSe TEMPerature RTD ALPHa lt va ue gt MINimum MAXimum SENSe TEMPerature RTD BETA lt va ue gt MINimum MAXimum SENSe TEMPerature RTD DELTa lt va ue gt MINimum MAXimum SENSe TEMPerature SPRTD RZERo lt va ue gt MINimum MAXimum SENSe TEMPerature SPRTD A4 lt va ue gt MINimum MAXimum SENSe TEMPerature SPRTD B4 lt va lue gt MINimum MAXimum SENSe TEMPerature SPRTD AX lt va ue gt MINimum MAXimum SENSe TEMPerature SPRTD BX lt va ue gt MINimum MAXimum SENSe TEMPerature SPRTD CX lt va ue gt MINimum MAXimum SENSe TEMPerature SPRTD DX lt va ue gt MINimum MAXimum Thermocouple Definition
29. signal fails the limit testing After the beeper is disabled the meter still emits a tone when an error occurs any button on the front panel is pressed the threshold value is exceeded in continuity testing Default The beeper is enabled when it is shipped from the factory How to control the beeper User can control the beeper from either the front panel operation or the remote interface operation Front Panel Operation Follow the procedure below to disable or enable the beeper Press MENU button then use lt and gt buttons to find SYSTEM menu Press ENTER to choose it and then again use lt and gt buttons to find BEEP menu Press ENTER to choose it and then find ON or OFF by using lt and gt buttons Press ENTER on your selection The locations of the buttons are shown with red rectangle frames in Figure 4 27 Procedures MENU SYSTEM BEEP ON OFF PREV NEXT ENTER _ ni in 7 i i Pi pom 7a DO f a i 5 G E 3 r f h i Figure 4 27 Remote Interface Operation 94 The following commands show how to use the remote interface operation to disable or enable the beeper SYSTem BEEPer SYSTem BEEPer STATe OFF ON 4 4 3 Reading Memory Store amp Recall 1201 has a memory capacity of 2000 readings The readings are stored in first in first out order and the memory type is volatile which means the stored rea
30. the input resistance mode Returns 1 ON or O OFF ROUTe TERMinals Query the multimeter to determine if the front or rear input terminals are selected Returns FRON or REAR ROUTe CLOSe lt channel gt Set channels which need to be closed lt The range is from channel 1 to 10 gt ROUTe CLOSe Query channels which were closed ROUTe OPEN Open all channels ROUTe STATe Read the state after scanning The state display is 1 means the scanner card was inserted or O means it hasn t been inserted yet ROUTe SCAN FUNCtion lt channel gt lt function gt VOLT DC VOLT AC FREQuency RESistance FRESistance NONE Set scanner card s measurement functions which might be for the VAC VDC Frequency 2 Wire Resistance 4 Wire Resistance or disabling the channel ROUTe SCAN FUNC lt channel gt Query the channel s function on the scanner card ROUTe SCAN TIMER Read the time interval of scanning ROUTe SCAN TIMER lt value gt Set the time interval of scanning lt The unit is second gt 151 ROUTe SCAN COUNT Read the number of times of scanning ROUTe SCAN COUNT lt value gt Set the number of times of scanning ROUTe SCAN STATe Read the state of scanning 1 means finished O means not finished ROUTe SCAN SCAN Run SCAN mode ROUTe SCAN STEP Run STEP mode C 6 The Math Operation Command CALCulate FUNCtion PERCe
31. using CONFIG TEMP and lt or gt When ready press ENTER button 4 Press TEMP button Place RTD in the desired position and take the reading on the display 49 Platinum RTD Figure 3 17 50 Sense 24 wire HI Platinum RTD Sense 4 wire LO Figure 3 18 51 4 Front Panel Operations This chapter contains information about how to change the parameters and settings for your measurements and all the details about each feature and function 4 1 Measurement Configuration The following information will guide you through ways to configure measurement functions It provides you the flexibility to change any parameter in any measurement function when needed including ADC setting filter resolution setting digits DC input resistance threshold resistance continuity range manual amp auto rate integration time sensor type for temperature measurements remote interface selection and input terminal switch 4 1 1 Set ADC Auto Zero amp Auto Gain Zero and Gain The purpose of Auto Zero and Auto Gain functions are used for minimizing the offset influence on your measurements When Auto Zero or Auto Gain is enabled 1201 takes the input signal reading as a base value and then internally disconnects the input signal and takes a offset reading a null offset It then subtracts the offset from the base to get an accurate measurement Displayed reading
32. way to program the multimeter for measurements However MEASure does not offer much flexibility The example is shown in Visual Basic Creating the Application Create a new Visual Basic project as follows 1 Create a new Standar EXE project 2 To set the startup object for a Windows Application to Sub Main 3 Add New Module and declare a Sub Main How to Change the Startup Object for an Application The Startup Object property for a project defines the entry point to be called when the application loads generally this is set to either the main form in your application or to the Sub Main procedure that should run when the application starts Since Class Libraries do not have an entry point their only option for this property is None For Windows Applications projects only forms or classes with a Public Sub Main procedure are available as Startup objects unless you check the Startup with custom Sub Main checkbox when this option is checked you must add code in the Sub Main procedure for the form Xx Note When using a custom Sub Main procedure as the Startup object code in the Application events Startup Shutdown Startup Next 165 Instance and Unhandled Exception is not executed The Startup Object property can be set in the Application pane of the Project Designer To change the startup object 1 With a project selected in Solution Explorer on the Project menu click Properties 2 Select the Application pane
33. 3 Select a Startup object from the Startup object drop down list To set the startup object for a Windows Application to Sub Main 1 With a project selected in Solution Explorer on the Project menu click Properties 2 Select the Application pane 3 Check the Startup with custom Sub Main checkbox 4 Select Sub Main from the Startup object drop down list LISTING D 1 MEASure bas THE Sub Main FUNCTION IS WHERE YOU NEED TO ADD INITIALIZATION CODE Sub Main Dim stat As ViStatus Dim dfltRM As ViSession Dim sesn As ViSession Dim fList As ViFindList Dim desc As String VI_FIND_BUFLEN Dim nList As Long Dim ret As Long Dim readin As String 64 stat viOpenDefaultRM dfiltRM If stat lt VI_SUCCESS Then Rem Error initializing VISA exiting MsgBox USBTMC resource not found vbExclamation 1201 multimeter device test Exit Sub End If Rem Find all 1201 USBTMC instruments in the system stat viFindRsrc dfltRM USB 0 9 0x164E 0xOFA3 INSTR fList nList desc If stat lt VI_SUCCESS Then Rem Error finding resources exiting MsgBox 1201 device not found vbExclamation 1201 multimeter device test viClose dfltRM Exit Sub End If 166 Rem Open a session to each and determine if it matches stat viOpen dfIltRM desc VI_NULL VI_NULL sesn If stat lt VI_SUCCESS Then MsgBox Open device failed vbExclamation 1201 multimeter device test stat viClose fList Exit Sub End
34. 4 4 Sensitivity Band Hold cccccccc ccc cccceeccceeeeesetsssseseececeeeeeesene eens 97 44 SS CAINIIG SCAN arra os tees ors E ache sheds ti oahu tated sosnsl aadew es 98 4456 Slepping SCD itacicesicassstsle teste os ad cata S 102 AA INUA M1 81 6 o ee nee or eee eee 103 BS SAT GUA C saieitss nets cucie tna sateueicteibisieint me Aeseia OE 104 PESO ERO COI ION a eaters et Secon ia Anas Meee O 105 44 LO Firmware REVISION orere a e est may E isa Re 106 AALT Cala ON o renee ate ere ea ee a ee aeRO 107 ALE SSC CSE i So sles seseherstnititaaadtnaate fst a oleate unat sateen 107 5 REMOTE INTERFACE OPERATIONG cccsscsssssssssscsssscsssscsssccsssscssssessseceeees 112 5 1 PASS FAIL OUTPUT FROM USB CONNECTOR 2 0 0 cccccccccssscceessecceescsseeeeessseeeensaees 112 5 2 SETTING UP FOR REMOTE INTERFACE sizcncctcacinieceartabuhidee bensuddinbeedaeticnedtutaledned 113 5 3 REMOTE INTERFACE COMMANDS mrnirontan ne a E 114 6 ERROR MESSAGES onran iii ees 127 Oct ERROR TYPE onnaa aaa aa aa 127 OL TEC CUO TET OFS roroa ET ee enh E N 127 APPENDIX Gere eee re et er err Ore E renner nie een ere errr eerie 132 As OPEC IFICATION EIS T aeiio e see eee T as eae th Darina 132 Bi GENERAL SPECIFICATION Sessie eirese en eia a E E E EE 136 C REMOTE INTERFACE REFERENCE amp cccttneivececinsvsaestasnoeeessicousd nace ERE EE E E E 137 C 1 An Introduction to the SCPI Language 137 GZ OQUCDUE Data FOMAC neia aE T E Senet 141 C3 MEMEAS
35. 9990 100Q Table 4 3 Here is the temperature equation that is used to determine the RTD temperature When lt 0C R R l At Be Ct t 100 When 0 C lt t lt 630 C R R 1 At Be A of 14 2 100 B a 10 C a 10 Where If you are using SPRTD Standard Platinum RTD select SPRTD and specify the seven coefficients under SPRTD submenu The ITS International Temperature Scale 90 standard provides two reference equations for Standard Platinum Thermometers covering temperature range from 18 8033K to 1234 93K However one SPRTD usually cannot cover the entire range so the temperature range is broken up into a few subranges These subranges depend on the calibration point of temperature scale and are based on the melting or triple points of various pure substances For an exact list of the elements needed and details on RTD calibration refer to NIST Technical Note 1265 Guidelines For Realizing the International Temperature Scale of 1990 In each subrange the calibration constants required for that subrange are listed Default The default sensor type in 1201 is PT100 How to set up RTD 66 You can set up the RTD configuration either through the front panel operation or through the remote interface operation Front Panel Operation If you are using RTD press CONFIG and then TEMP Use lt and gt to locate SENSOR submenu Press ENTER to go to the submenu Use lt and gt to
36. AC measurement resolution is fixed at 6 12 digits Therefore the resolution parameter only affects the front panel display MEASure RESistance lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF Preset and make a 2 wire 9 measurement with the specified range and resolution The reading is sent to the output buffer MEASure FRESistance lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF Preset and make a 4 wire Q measurement with the specified range and resolution The reading is sent to the output buffer MEASure FREQuency lt range gt MIN MAX DEF lt lt resolution gt MIN MAX DEF Preset and make a frequency measurement with the specified range and 142 resolution The reading is sent to the output buffer For frequency measurements the meter uses only one range for all inputs between 3Hz and 300kKHz With no input signal applied frequency measurements return O MEASure PERIiod lt range gt MIN MAX DEF lt lt resolution gt MIN MAX DEF Preset and make a period measurement with the specified range and resolution The reading is sent to the output buffer For period measurements the meter uses only one range for all inputs between 0 33 seconds and 3 3 usec With no input signal applied period measurements return O MEASure CONTinuity Preset and make a continuity measurement The reading is sent to the output buffer The range and resolution are fixed at 1kQ a
37. CTET oe TL jii oa 5 T B g igm T ine EELT ELIT i bees O D vain F E E nT n TEETE ETIT cc TI 1 y Ly hae Tr Tt 7 E i MEI i LLL ba ey bee ee moe fh ald hoon ie TLL TIT a8 LLL CV OFF Figure 2 17 30 2 3 2 1 Annunciators at Upper Side ADRS RMT MAN TRIG HOLD MEM RATIO MATH Figure 2 18 ADRS Indicates the multimeter is controlled via GPIB Interface RMT REMOTE Indicates the remote state USB Interface MAN Indicates the manual range is taken TRIG Shows the single triggering is enabled HOLD Indicates reading hold function is enabled MEM Indicates the using of internal memory RATIO Indicates the dcv dcv ratio operation MATH Indicates the MATH operation is taken ERR Error occurs SHIFT Indicates SHIFT button is pressed REAR The rear panel input terminal is selected for the measurement FILT The digital filter is started 2 3 2 2 Annunciators at Right Side 4W Indicates 4 wire mode is selected for resistance measurement e Indicated the continuity testing is enabled P Indicates the diode testing operation is taken e CW Not used for Model 1201 QW EXT CC Not used for Model 1201 3 AUTO CV Not used for Model 1201 EXT Indicates the External Trigger Mode is enabled LOCK Indicates the front panel menu operation is locked OVP Not used for Model 1201 OCP Not used for Model 1201 OFF Indicates the front panel di
38. External Frequency Period Front Panel w Auto Trigger ON Table 4 4 How to specify a delay time User can set the delay time from either the front panel operations or the remote interface operations Front Panel Operation To set the delay time press MENU button and use lt and gt buttons to 7 locate TRIG option Press ENTER to select it Then again find DELAY option using lt and gt buttons Press ENTER to select it Then use lt and gt buttons to move through the digits and A and V buttons to set the desired delay time between O to 3600 second The locations of the buttons are shown with red rectangle frames in Figure 4 13 TENT PREV NEXT ENTER Figure 4 13 Remote Interface Operation AUTO You can also use the remote interface operations from your PC terminal to set the trigger delay To select a delay time use the following command or set the trigger delay to be automatic TRIGger DELay lt seconds gt MINimum MAXimum or TRIGger DELay AUTO OFF ON 4 3 Math Operations This section will introduce the mathematical operations in 1201 There are eight math operations RITIO Min Max NULL Limits MX B dB and dBm testing They either store data for later use or perform mathematical operations on the readings Note that these math operations are available to all measurement functions except continuity and diode testing X Note The MATH anunnciator on the display
39. GER buttons To disable it simply press AUTO TRIGGER The locations of the buttons are shown with red rectangle frames in Figure 4 12 AUTO 4 TRIGGER Figure 4 12 D Trigger delay This feature is useful for user who needs a longer delay time to wait for the system to be stabilized The time needed to stabilize a measurement 75 system is called the settling time The settling time depends on the measurement range cable properties and signal source Defaults The default of the trigger delay is automatic 1201 automatically selects a delay time for you according to the setting of the measurement if you do not specify a delay A list of the default for each measurement function is shown on Table 4 4 The range for the delay is from O to 3600 seconds User s selection of delay time is stored in a volatile memory and the default will be restored when the meter is power off The internal settings of automatic trigger delay The delay time for automatic trigger delay is determined by the selection of measurement function range and the setting of integration time and AC filter speed The following table shows the default delay time for each measurement setting 76 Trigger Delay Measurement Function Setting Ti ime DCV DCI Q2 and 94 PLC gt 1 Q2 and 94 PLC lt 1 ACV ACI Remote Interface External Trigger Single Trigger ACV ACI Front Panel w Auto Trigger On Remote Interface
40. Ge lt range gt MINimum MAXimum The command syntax shows most commands and some parameters as a mixture of upper and lower case letters The upper case letters indicate the abbreviated spelling for the command For shorter program lines send the abbreviated form For better program readability send the long form For example in the above syntax statement VOLT and VOLTAGE are both acceptable forms You can use upper or lower case letters Therefore VOLTAGE volt and Volt are all acceptable Other forms such as VOL and VOLTAG will generate an error Braces 4 enclose the parameter choices for a given command string The braces are not sent with the command string A vertical bar separates multiple parameter choices for a given command string Triangle brackets lt gt indicate that you must specify a value for the enclosed parameter For example the above syntax statement shows the range parameter enclosed in triangle brackets The brackets are not sent with the command string You must specify a value for the parameter such as VOLT DC RANG 10 Some parameters are enclosed in square brackets The brackets indicate that the parameter is optional and can be omitted The brackets are not sent with the command string If you do not specify a value for an optional parameter the multimeter chooses a default value Using the MIN and MAX Parameters You can substitute MINimum or MAXimum in place of a parameter for
41. MIN MAX DEF lt resolution gt MIN MAX DEF RESistance lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF FRESistance lt range gt MIN MAX DEF lt lt resolution gt MIN MAX DEF FREQuency lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF PERiod lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF CONTinuity DIODe TCOuple TEMPerature The CONFigure Command The CONFigure command offers a little more flexibility than the MEASure Command The multimeter sets the parameters for the requested function range and resolution but does not make the measurements You have an option to change the configuration To initiate the measurement use INITiate or READ Command CONFigure VOLTage DC lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF VOLTage DC RATio lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF VOLTage AC lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF CURRent DC lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF CURRent AC lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF RESistance lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF FRESistance lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF FREQuency lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF PERiod lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF CONTinuity 115 DIODe TCOuple TEMPerature CONFigure The
42. NSe RESistance NPLCycles 0 02 0 1 1 10 MINimum MAXimum SENSe RESistance NPLCycles MINimum MAXimum 64 SENSe FRESistance DC NPLCycles 0 02 0 1 1 10 MINimum MAXimum SENSe FRESistance DC NPLCycles MINimum MAXimum For frequency and period measurements aperture time or gate time is analogous to integration time and you can use the following commands to set it Specify 10 ms 4 5 digits 100 ms default 5 5 digits or 1 second 6 5 digits SENSe FREQuency APERture 0 01 0 1 1 MINimum MAXimum SENSe FREQuency APERture MINimum MAXimum SENSe PERiod APERture 0 01 0 1 1 MINimum MAXimum SENSe PERiod APERture MINimum MAXimum 4 1 8 Sensor Selection for Temperature Measurements The multimeter supports both thermocouple and RTD User needs to configure the multimeter for the right sensor type before they can make temperature measurements RTD Definition If you are using RTD the options are PT100 D100 F100 PT385 PT3916 user defined RTD NTCT and SPRTD If you need to change the factors that are used to calculate the temperature in RTD choose user defined RTD in which you are able to change any factors as you wish The default factors used are listed in Table 4 3 Type Alpha Beta Delta R zero PT100 0 003850 0 10863 1 49990 10022 D100 0 003920 0 10630 1 49710 10002 F100 0 003900 0 11000 1 49589 1009 PT385 0 003850 0 11100 1 50700 100 PT3916 0 003916 0 11600 1 50594 1009 65 NTCT 0 003850 0 10863 1 4
43. ONFigure command gives you a little more programming flexibility than the MEASure command This allows you to incrementally change the multimeter s configuration The example is is shown in Visual Basic Creating the Application Create a new Visual Basic project as follows 1 Create a new Standar EXE project 2 To set the startup object for a Windows Application to Sub Main 3 Add New Module Declare a Sub Main LISTING D 2 THE CONFigure FUNCTION Public Declare Sub Sleep Lib kernel32 ByVal dwMilliseconds As Long Sub main Rem FFFFFFFFEEE EEA HARRAH HE ERR R RRR EEE EE Rem Rem Using NI VISA library visa32 dll Rem Rem Set sample count 5 configuration and Rem read the trigger Rem Rem HFFFFFFFEF EEE EEA HARRAH AE ERR A RRA EEE Dim stat As ViStatus Dim dfltRM As ViSession Dim sesn As ViSession Dim fList As ViFindList Dim desc As String VI_FIND_BUFLEN Dim nList As Long Dim ret As Long Dim readin As String 128 Dim i As Integer Array index stat vi0penDefaultRM dfiltRM If stat lt VI_SUCCESS Then Rem Error initializing VISA exiting MsgBox USBTMC resource not found vbExclamation 1201 multimeter device test Exit Sub End If Rem Find all 1201 USBTMC instruments in the system stat viFindRsrc dfltRM USB 0 9 0x164E 0xOFA3 INSTR fList nList desc 168 If stat lt VI_SUCCESS Then Rem Error finding resources exiting MsgBox 1201 device not f
44. OUNt lt va ue gt MINimum MAXimum INFinite Specify the number of triggers the multimeter will accept before returning to the idle state Select from 1 to 50 000 triggers The INFinite parameter instructs the multimeter to take triggers continuously Trigger count is ignored while in local operation TRIGger COUNt MINimum MAXimum INFinite Query the trigger count Returns 9 90000000E 37 when you select the infinite trigger count C 8 The System Related Commands FETCh Transfer readings stored in memory by the INITiate command to output buffer 156 where you are able to read them into your bus controller READ Change the state of the triggering system from the idle state to wait for trigger state The meter will start to make measurements when a required triggering condition is met after the READ command is received Measurement readings are sent to the output buffer immediately DISPlay OFF ON Turn off or on the display DISPlay Query the display setting Returns O OFF or 1 ON DISPlay TEXT lt quoted string gt Show a message on the front panel display The allowed message can be up to 16 characters in the lower row display any additional characters will be truncated DISPlay TEXT Query the message sent to the front panel display DISPlay TEXT CLEar Clear the message shown on the front panel display SYSTem BEEPer Issue a single beeping tone SYSTe
45. PERture MINimum MAXimum SENSe DETector BANDwidth 3 20 200 MINimum MAXimum DETector BANDwidth MINimum MAXimum SENSe AVERage TCONtrol MOVing REPeat AVERage TCONtrol AVERage COUNt lt va ue gt MINimum MAXimum AVERage COUNt MINimum MAXimum AVERage STATe OFF ON AVERage STATe SENSe ZERO AUTO OFF ONCE ON ZERO AUTO GAIN AUTO OFF ONCE ON GAIN AUTO Other Measurement Configuration Commands INPut IMPedance AUTO OFF ON IMPedance AUTO Scanner Card Configuration Commands ROUTe CLOSe lt channel gt ROUTe CLOSe 120 ROUTe OPEN ROUTe STATe ROUTe SCAN FUNCtion lt channel gt lt function gt VOLT DC VOLT AC FREQuency RESistance FRESistance NONE ROUTe SCAN FUNC lt channel gt ROUTe SCAN TIMER ROUTe SCAN TIMER lt value gt ROUTe SCAN COUNT ROUTe SCAN COUNT lt value gt ROUTe SCAN STATe ROUTe SCAN SCAN ROUTe SCAN STEP MATH OPERATION Commands There are eight math operations Only one of them can be enabled at a time They either store data for later use or perform mathematical operations on the readings Note that these eight math operations are available to all measurement functions except continuity and diode testing The math operations use one or more internal registers You can preset the values in some of the registers while others hold the results of the math operations CALCulate FUNCtion PERCent AVERag
46. PLC Thermocouple K Type Source Immediate Triggers Delay Auto Input Resistance 10MQ 2 2 Features Resolution 6 5 digits 5 7 dot matrix VFD dual displays with 3 color annunciators 11 standard measurement functions amp 8 math functions 4 front ground terminal are connected to Chassis Stability Accuracy and Speed 2000RDGS Sec at 4 5 Digit 50 RDGS Sec at 6 5 Digit in 60 Hz Multi Points Scanner Card Up to 10 Channels Optional RTD probe Adapter optional convenient to use Built in USB and GPIB Optional Interfaces Easy amp Free PC applications 2 3 1201 Function Introduction For users to become familiar with the 1201 DMM we will give a brief introduction to the basic operations of 1201 DMM There are three major parts of 1201 2 3 1 the front panel 2 3 2 the display and 2 3 3 the rear panel We will discuss each of them in the following sections 2 3 1 The Front Panel There are different buttons and terminals on the front panel They are divided into the following groups DISPLAY amp POWER FUNCTION MATH TRIGGER MEMORY SETUP RANGE INPUT TERMINALS and FILTER DIGITS LOCAL and SHIFT as shown in Figure 2 15 26 1 Figure 2 15 Power amp Display Power Activates 1201 DMM Display Shows model version amp condition by pressing round PREV amp NEXT buttons 2 1 First row without SHIFT button DCV Selects DC voltage measurement ACV Selects AC voltage measurem
47. RANGe AUTO OFF ON FRESistance RANGe AUTO FREQuency VOLTage RANGe AUTO OFF ON FREQuency VOLTage RANGe AUTO PERiod VOLTage RANGe AUTO OFF ON PERiod VOLTage RANGe AUTO SENSe VOLTage DC RESolution lt resolution gt MINimum MAXimum VOLTage DC RESolution MINimum MAXimum VOLTage AC RESolution lt resolution gt MINimum MAXimum VOLTage AC RESolution MINimum MAXimum CURRent DC RESolution lt resolution gt MINimum MAXimum CURRent DC RESolution MINimum MAXimum CURRent AC RESolution lt resolution gt MINimum MAXimum CURRent AC RESolutioin MINimum MAXimum RESistance RESolution lt resolution gt MINimum MAXimum RESistance RESolution MINimum MAXimum FRESistance RESolution lt resolution gt MINimum MAXimum FRESistance RESolution MINimum MAXimum SENSe UNIT Cel Far K UNIT TCOuple TYPE E J K N R S T TCOuple TYPE TCOuple RJUNcion RSELect REAL SIMulated gt TCOuple RJUNcion RSELect TCOuple RJUNction SIMulated lt va ue gt MINimum MAXimum 118 TCOuple RJUNction SIMulated TCOuple RJUNction REAL OFFSet lt va ue gt MINimum MAXimum TCOuple RJUNction REAL OFFSet MINimum MAXimum SENSe TEMPerature RTD TYPE PT100 D100 F100 PT385 PT3916 USER SPRTD NTCT TEMPerature TEMPerature TEMPerature TEMPerature TEMPerature TEMPerature TEMPerature TEMPerature TEMPerature TEMPerature TEMPerature TEMPerature TEMPerature TEMPerature TEMPerature TEMPera
48. S232 baud amp Interface l parity Table 4 5 How to save the settings Press MENU and then use lt and gt to locate SYSTEM submenu Press ENTER to select it Again use lt and gt to locate INIT MODE submenu and then press ENTER to select it Use lt and gt to switch from SAVE DATA and DEFAULT Press ENTER on SAVE DATA to save your current setting or press ENTER on DEFAULT to return to default setting The locations of the buttons are shown with red rectangle frames in Figure 4 33 PREV NEXT ENTER Figure 4 33 4 4 8 Language 1201 supports two languages DEFAULT 1201 and COMPATIBLE How to set up the language Press MENU and then use lt and gt to locate SYSTEM submenu Press ENTER to select it Again use lt and gt to locate LANGUAGE submenu Press ENTER to select it Use lt and gt to switch from DEFAULT 1201 and COMPATIBLE Press ENTER on your selection The locations of the buttons are shown with red rectangle frames in Figure 4 34 104 PREV NEXT ENTER Figure 4 34 4 4 9 Error Condition The error annunciator on the front panel display tells about the error condition of the multimeter If there are one or more syntax or hardware errors found the error annunciator will be lit to inform user The multimeter stores errors using the first in first out FIFO order and it records up to 20 errors in the error queue The first erro
49. SENSe TEMPerature RTD RZERo MINimum MAXimum Query the R Zero constant for the user defined RTD type SENSe TEMPerature RTD ALPHa lt val ue gt MINimum MAXimum Set the alpha constant for the user type SENSe TEMPerature RTD ALPHa MINimum MAXimum Query the alpha constant for the user type SENSe TEMPerature RTD BETA lt va ue gt MINimum MAXimum Set the beta constant for the user type SENSe TEMPerature RTD BETA MINimum MAXimum Query the beta constant for the user type SENSe TEMPerature RTD DELTa lt va ue gt MINimum MAXimum Set the delta constant for the user type SENSe TEMPerature RTD DELTa MINimum MAXimum Query the delta constant for the user type SENSe TEMPerature SPRTD RZERo lt value gt MINimum MAXimum Set the sensor R value at O degree Celsius SENSe TEMPerature SPRTD RZERo MINimum MAXimum Query the sensor R value at 0 degree Celsius SENSe TEMPerature SPRTD A4 lt value gt MINimum MAXimum Set the A4 coefficient SENSe TEMPerature SPRTD A4 MINimum MAXimum Query the A4 coefficient SENSe TEMPerature SPRTD B4 lt va ue gt MINimum MAXimum Set the B4 coefficient SENSe TEMPerature SPRTD B4 MINimum MAXimum Query the B4 coefficient SENSe TEMPerature SPRTD AX lt va ue gt MINimum MAXimum Set the A coefficient SENSe TEMPerature SPRTD AX MINimum MAXimum 148 Query the A coefficient SENSe TEMPerature SPRTD BX
50. SRE STB TRG Dedicated Hardware Lines Addressed Commands ATN IFC REN SRQ Attention Interface Clear Remote Enable Service Request Interrupt DCL EOI GET GTL LLO SDC SPD SPE Device Clear End or Identify Message Terminator Group Execute Trigger Go to Local Local Lock Out Selected Device Clear Serial Poll Disable Serial Poll Enable Using Device Clear to Halt Measurements Device clear is an IEEE 488 low level bus message which can be used to halt measurements in progress Different programming languages and IEEE 488 interface cards provide access to this capability through their own unique commands The status registers the error queue and all 163 configuration states are left unchanged when a device clear message is received Device clear performs the following actions eAll measurements in progress are aborted eThe multimeter returns to the trigger idle state eThe multimeter s input and output buffers are cleared eThe multimeter is prepared to accept a new command String For RS 232 operation sending the lt Ctr C gt character will perform the equivalent operations of the IEEE 488 device clear message The multimeter s DTR data terminal ready handshake line will be true following a device clear message See DTR DSR Handshake Protocol for further details TALK ONLY for Printers You can set the address to 31 which is the ta k only mode In this mode the m
51. Se PERiod APERture MINimum MAXimum Query the gate time or aperture time for period function SENSe DETector BANDwidth 3 20 200 MINimum MAXimum Specify the lowest frequency expected in the input signal The meter selects the slow medium or fast ac filter based on the frequency you specify SENSe DETector BANDwidth MINimum MAXimum Query the ac filter and return the bandwidth SENSe ZERO AUTO OFF ONCE ON Disable or enable the auto zero mode The OFF and ONCE have a similar effect OFF mode does not issue a new offset measurement until the multimeter goes to the WAIT FOR TRIGGER state Parameter ONCE issues an immediate offset measurement SENSe ZERO AUTO Query the auto zero mode Returns 1 ON or O OFF or ONCE SENSe GAIN AUTO OFF ONCE ON Disable or enable the auto gain mode The OFF and ONCE have a similar effect OFF mode does not issue a new offset measurement until the multimeter goes to the WAIT FOR TRIGGER state Parameter ONCE issues an immediate offset measurement SENSe GAIN AUTO Query the auto gain mode Returns 1 ON or O OFF or ONCE INPut IMPedance AUTO lt OFF ON Disable or enable the automatic input resistance mode for DC voltage measurements With AUTO ON the input resistance is set to gt 10GQ for the 150 100mV 1V and 10V ranges With AUTO OFF the input resistance is fixed at 10MQ for all ranges INPut IMPedance AUTO Query
52. TATe OFF ON CALCulate STATe CALCulate PERCent TARGet lt va ue gt MINimum MAXimum CALCulate PERCent TARGet MINimum MAXimum 4 3 3 Min Max Definition When the Min Max function is enabled the multimeter takes in a series of readings from the measurements stores the minimum and maximum readings in the memory and then calculates the average value of all readings The number of readings taken since Min Max operation is enabled is recorded as well These data are stored in a volatile memory 81 and will be cleared when the meter is turned off or when the MIN MAX is turned on or after a remote interface reset The meter beeps every time when it captures a new minimum or maximum How to use Min Max You can use the Min Max feature either through the front panel operation or the remote interface operation Front Panel Operation User first selects the measurement function they wish to use and then press MIN MAX button to enable the Min Max function To read the min max value the average value or the readings count user can press CONFIG button and then MIN MAX button Use lt and gt buttons to switch between those values The locations of the buttons are shown with red rectangle frames in Figure 4 16 Xx Note Press MIN MAX again to disable this feature The MATH anunnciator on the display indicates the state of a mathematical feature Figure 4 16 Remote Interface Operation The following commands show you
53. Tage AC VOLTage DC RATio CURRent DC CURRent AC RESistance for 2 wire ohms FRESistance for 4 wire ohms FREQuency PERiod CONTinuity DIODe TCOuple TEMPerature 145 SENSe FUNCtion Query the measurement function and return a quoted string SENSe lt function gt RANGe lt range gt MINimum MAXimum Select a range for the selected function For frequency and period measurements range applies to the signal s input voltage not its frequency use FREQuency VOLTage or PERiod VOLTage MIN selects the lowest range for the selected function MAX selects the highest range SENSe lt function gt RANGe MINimum MAXimum Query the range for the selected function For frequency and period use FREQuency VOLTage or PERiod VOLTage Autorange thresholds Down range at lt 10 of range Up range at gt 120 of range SENSe lt function gt RANGe AUTO OFF ON Disable or enable autorange for the selected function SENSe lt function gt RANGe AUTO Query the autorange setting Return 1 ON or 0 OFF SENSe lt function gt RESolution lt resolution gt MINimum MAXimum Set resolution for the selected function not valid for frequency period or ratio Specify the resolution in the same units as the measurement function not in number of digits MIN selects the smallest value accepted which gives the most resolution MAX selects the largest value accepted which gives the least resolution SENSe
54. UCLEONICS CORPORATION Please contact your local service representative Excluded Items This warranty does not include consumptive parts such as fuses buttons and relays Neither does this warranty cover defects caused by improper installation improper or insufficient NI maintenance unauthorized modification improper operation ignorance of environmental specifications or improper software or interfacing 4 Remarks No other warranty is expressed or implied except for the above mentioned The remedies provided herein are the buyer s sole and exclusive remedies BERKELEY NUCLEONICS CORPORATION shall not be liable for any direct indirect special incidental or consequential damages Limitation of warranty 1 Our warranties do not cover any damage resulting from unauthorized modification or misuse 2 Unless mentioned elsewhere in this document our warranty does not apply to fuses probes and problems arising from normal wear or user s failure to follow instructions 3 Our warranties do not apply on any direct incidental special or consequential damages 4 The above warranties are exclusive and no other warranty is expressed or implied BERKELEY NUCLEONICS CORPORATION disclaims any implied warranties of MERCHANTABILITY SATISFACTORY QUALITY and FITNESS for any particular reasons 1 3 Precaution of Operation Please carefully read the manual before operating this device This manual is for reference only
55. UrE COMMANA ela sacl iat eee hea she 142 C 4 The CONFIQUrE Command 0 ccccccccccccecsecsscesseesceseeeecceseeeersnssseeeenaes 143 C 5 The Measurement Configuration Command 145 C 6 The Math Operation Command 152 C 7 The TriQGering COMMANAS sesanerieninena 155 C 8 The System Related COMMANAS eerren 156 G 9 Status Reporting COMMBANGS orris e a TR 158 C 10 SCPI Compliance Information 160 C 11 IEEE 488 Compliance Information eeen 162 D ABOUT APPLICATION PROGRAMS nnnnsssssssssesssossssssesssssssssssererreeesssssssssrresssssrrren 164 1 General Information This section contains general information about BERKELEY NUCLEONICS CORPORATION 1201 Multimeter The information is shown below Feature Overview Warranty Information Safety Information Symbols and Terms Specifications Inspection Options and Accessories If you have any questions after reading this information please contact your local service representative 1 1 Feature Overview 1201 is a 6 5 digit digital multimeter It has 0 0015 24 hour basic DC voltage accuracy at 10V range and 0 002 24 hour basic resistance accuracy at 10kQ range At 6 5 digit the multimeter delivers 50 triggered RDGS sec via remote interface At the fast 4 5 digit it reads over 2000 RDGS sec into its internal buffer 1201 provides wide measurement ranges X Note The 24 hour measurement is subject to calibration accuracy DC voltage 0 1V 1V 10V 100V amp 1000V AC vol
56. V NEXT gt ENTER Figure 4 28 To recall the stored readings use the following steps Press RECALL button and the multimeter will display all the stored readings starting from the first reading Use lt and gt or Vand A buttons to move from the first reading to the last reading the meter has stored The locations of the buttons are shown with red rectangle frames in Figure 4 29 RECALL PREV NEXT DC D Figure 4 29 Remote Interface Operation Users can use the following commands from their PC terminals to store 96 or retrieve readings in the memory In addition the number for STORE function only can be set through front panel INITiate This command tells the meter to be on wait for trigger state After a measurement is taken measurement readings will be placed in the memory FETCh Use this command to retrieve stored readings DATA POINts Use this command to query the number of stored readings 4 4 4 Sensitivity Band Hold The reading hold function captures and holds a stable reading on the display The multimeter beeps and holds the value when it detects a Stable reading The sensitivity band in reading hold decides which reading is stable enough This band is expressed as a percent of reading on the selected range The multimeter considers a reading stable when three consecutive values are within the band User has an option to adjust this sensitivity
57. ady for next trigger event The single trigger mode is only available through the front panel operations How to use Single Trigger First select the measurement function and then press SINGLE key on the front panel to set the trigger mode The location of the button is shown with a red rectangle frame in Figure 4 10 J om a t wy jake Figure 4 10 4 2 2 Trigger Source 72 In 1201 user can specify the trigger source to be one of these three options front panel operations external hardware trigger source and remote interface operations Front Panel Operation Use the front panel buttons AUTO TRIGGER for auto triggering and SINGLE for single triggering External Hardware User applies a trigger pulse to the Ext TRIG BNC terminal on the rear panel External hardware triggering is like using single trigger but the trigger source is an external hardware When the multimeter receives a pulse from the trigger source it takes one reading or a specified number of readings To set the external hardware trigger press both the SHIFT SINGLE buttons to enable external hardware trigger The lit EXT annunciator on the display indicates the enabling of the external hardware trigger Remote Interface Operation By software or internal trigger By software trigger The software trigger is similar to the single triggering but instead of using the SINGLE button on the front panel you send
58. amiliar with those features after reading this chapter 2 1 Setting up Your 1201 Digital Multimeter The purpose of this section is to prepare users for using 1201 DMM You may want to check if you have all the parts with your multimeter All our products are handled and inspected professionally before shipping out to our customers If you find any damaged or missing parts please contact your local service representative immediately and do not attempt to operate the damaged product If users have any doubt about their products they are encouraged to contact their local service representative 2 1 1 To adjust the handle You may adjust the carrying handle to suit your needs The following figures show you how to adjust the handle I Taking off the handle from the Multimeter Step 1 Turn up the handle Pull slightly outward on both sides of the handle and slowly rotate it up as shown in Figure 1 1 14 Figure 1 1 Step 2 Pull out the handle When the handle is turned up to 90 with the multimeter please pull out the handle from the multimeter as shown in Figure 1 2 Figure 1 2 I Adjusting the position for your convenience Here are some example positions to suit users needs Position 1 The default position is for packing as shown in Figure 1 3 gt Figure 1 3 Position 2 The adjusted position is for operation as shown in Figure 1 4 Figure 1 4 Position 3 The carrying position i
59. and the accuracy of the measurement The unit of the integration time is in PLC power line cycles One PLC for 60 Hz is 16 67 ms and for 50 Hz is 20 ms There are 4 different integration times in 1201 for user to select from 0 02 0 1 1 and 10 PLCs Default For DCV DCI and resistance measurement the default integration time is 1 PLC The user selected value is stored in a volatile memory and the default value will be restored when the meter is power off How to set the integration time You can set the integration time either through the front panel operation or through the remote interface operation Front Panel Operation Integration time is set indirectly when user selects the measurement resolution Please refer to chapter 4 1 3 for details about how to set resolution or the digits Table 4 1 on page 51 shows the relationship between the resolution and the integration time Remote Interface Operation Use the following commands on your PC terminal to set the resolution CONFigure lt function gt lt range gt lt resolution gt MEASure lt function gt lt range gt lt resolution gt SENSe lt function gt RESolution lt resolution gt Or you can set integration time directly by the following commands SENSe VOLTage DC NPLCycles 0 02 0 1 1 10 MINimum MAXimum SENSe VOLTage DC NPLCycles MINimum MAXimum SENSe CURRent DC NPLCycles 0 02 0 1 1 10 MINimum MAXimum SENSe CURRent DC NPLCycles MINimum MAXimum SE
60. ant Grade 2038 Others If any part of the Test Lead Set is damaged please do not use and replace with a new set X Warning If users use the Test Lead Set without following the specification of Berkeley Nucleonics Corporation the protection of the Test Lead Set could be impaired In addition please don t use a damaged Test Lead Set against the instrument break or personal injury 1 8 Options and Accessories The following options and accessories are available from BERKELEY NUCLEONICS CORPORATION for use with the Model 1201 Please refer to the following Table 1 1 Part Name Part Number Multi point Scanner Card 1201 opt01 Thermocouple adapter 1201 opt02 GPIB Card 1201 opt04 RS232 Adapter 1201 opt06 Kelvin Probe 1201 opt07 Table 1 1 12 1 9 1201 s Dimension Please get the dimension s information in the following different ways 1 The dimension without the handle and the front amp Rear Bumpers is in the following Picture 1 LxWxD 213 6x88 6x370 mm 2 The dimension with the handle and the front amp Rear Bumpers is in the following Picture 2 LxWxD 255x113x373 mm 3 The dimension with the front amp Rear Bumpers but without the handle is in the following Picture 3 LxWxD 224x113x373 mm 13 2 Overview This chapter will give you an overview of 1201 s basic features and guide you through the basics of 1201 digital multimeter Users will become f
61. asurement readings are stored in a stack of memory The number may be in the range of 2 to 100 User may select one of the two modes of digital filter operations Moving Average and Repeating Average The moving average filter puts the specified number of reading conversions in a first in first out order The very first measurement reading simply fills up the stack To yield a reading for display the filter produces an average of the stacked measurement readings every time a new measurement reading is available and replaces the oldest reading in 56 the stack In the repeating average mode the multimeter waits for the measurement reading stack to fill up and then take an average to produce a reading for display It then flushes the stack and starts over with an empty stack Consequently the repeating digital filter yields one reading for display every specified number of measurement readings Digital filter is not available for diode continuity frequency and period measurements Default The digital filter is enabled and is in moving average mode with 10 readings by default How to enable disable digital filter Press FILTER button to switch the digital filter function The FILT anunnciator indicates the state of the digital filter When it is lit the filter is enabled How to configure digital filter You can configure the digital Filter either through the front panel operation or through the remote interface operation Fr
62. ates hazards that may cause damages to the instrument or even result in personal injury A This symbol indicates high voltage may be present Use extra caution before taking any action chr This symbol indicates the frame or chassis terminal presented need to be connected to the actual earth ground 10 This symbol indicates Protective Conductor Terminal This symbol indicates earth ground terminal C This symbol indicates this product complies with the essential requirements or the applicable European laws or directives with respect to safety health environment and consumer protections AN Note Full 1201 specifications are included in Appendix A 1 7 Inspection Your product package is supplied with the following items One 1201 Multimeter unit 85 H x 210 W x 350 D mm approx 4 3 Kg One power line cord One USB cable Standard Test Leads One CD including this electronic User s Manual and software applications Optional accessories as you ordered Multi Point scanner card Optional GPIB interface card Optional 1 The 1201 is provided with a Standard Test lead set described below Test Lead Ratings IEC 61010 031 CAT III Operating Voltage 1000V DC Current 10 Ampers UL CE Rated 11 Material Probe Body Outer Insulation Santoprene Rubber Banana Plug Body Brass Nickel Plated Spring Beryllium Copper Nickel Plated Insulation Polypropylene Resin Flasme Retard
63. band Default The default band is 0 1 User s selection is stored in a volatile memory and it will be cleared after the meter has been turned off How to adjust the sensitivity band You can adjust the sensitivity band through either the front panel operation or the remote interface operation Front Panel Operation In order to adjust the sensitivity band please press MENU button then use lt and buttons to find TRIG submenu Press ENTER to select it Then again use lt and gt buttons to find READ HOLD submenu Press ENTER to choose it Then use lt and gt buttons to choose a desired band Press ENTER to set the desired sensitivity band The locations of the buttons are shown with red rectangle frames in Figure 4 30 PREV NEXT EM ss Figure 4 30 4 4 5 Scanning Scan User can purchase an optional internal scanner card to be used with 1201 as the following picture shown This multipoint scanner card lets you Switch and scan up to 10 channels of input signals User can open and close individual channels set scan count and scan interval store measurement readings and activate measuring through channels defined with different measurement functions The measurements are taken through all defined channels in sequence The scan count limits the total number of measurements the multimeter makes through all defined channels in one single scanning operation The scan interval is the period of time th
64. bers in XX XX XxX format on the display The first number is the firmware revision number for the measurement microprocessor the second number is for I O processor and the third number is for the front panel processor The locations of the buttons are shown with red rectangle frames in Figure 4 36 MENU PREV NEXT A Sue Figure 4 36 106 4 4 11 Calibration 1201 will show the latest calibrated date and the next calibration date on the display after following the operation below The location of the buttons is shown with red rectangle frames in Figure 4 37 How to see the calibration information Press MENU then locate CALIBRATE option using lt and gt Press ENTER to select it Use lt and gt to switch from the last calibrated date and the next calibration date PREV NEXT ENTER F Joe ti I 1 F fi S a T ad j j o ec mh i i al Figure 4 37 4 4 12 Self test Self test procedures are built in 1201 for checking that the logic and measurement hardware are functioning properly Every time when the multimeter is powered on a set of test procedures is performed to make sure the basic function of the multimeter works properly If any error occurs during self test procedures it indicates that parts of the multimeter are not operating properly and need to be serviced A power line vol
65. d PERIOD SHIFT FREQ Press ENTER on RESOLUTION submenu If it is not shown on the display use lt and gt to locate it Use lt and gt to find your desired resolution Press ENTER on your choice Note The resolution of AC measurements is fixed at 6 5 digit Note The options for frequency and period measurements are 4 5 slow 5 5 slow and 6 5 slow C Ta l Fal l i k rl Sn i r C kS TAH d a Me Figure 4 3 pea es 59 Remote Interface Operation Use the following commands on your PC terminal to set the resolution for your measurement CONFigure lt function gt lt range gt lt resolution gt MEASure lt function gt lt range gt lt resolution gt SENSe lt function gt RESolution lt resolution gt 4 1 4 DC Input Resistance Definition To reduce the effect of loading errors due to the input resistance 1201 allows user to select a much larger input resistance gt 10G Q for low input DC voltage 100mV 1V and 10V measurements This feature is only available for DC voltage measurements and it is not applicable to other measurement functions Default The default input resistance for all measurements is 10M Q Please refer to Table 2 1 on page 24 The DC input resistance can only be changed for measurements with 100mV 1V or 10V range For 100V DCV 1000 V DCV and other measurement functions the input resistance is fixed at 10M Q and can not be changed Also note t
66. d them Use FETCh command to retrieve your measurements results READ Change the state of the triggering system from the idle state to wait for trigger state The meter will start to make measurements when a required triggering condition is met after the READ Command is received Readings are sent to the output buffer right away TRIGger SOURce BUS IMMediate EXTernal Select a trigger source The multimeter will accept a software BUS trigger an immediate internal trigger or a hardware trigger from the rear panel EXT TRIG terminal TRIGger SOURce Query the trigger source TRIGger DELay lt seconds gt MINimum MAXimum 155 Set a trigger delay time in seconds The delay is the time between the trigger Signal and each sample that follows Specify a delay time from O to 3600 seconds TRIGger DELay Query the trigger delay time TRIGger DELay AUTO OFF ON Disable or enable a automatic trigger delay The delay is determined by function range integration time and ac filter setting Specifying a delay time automatically turns off the automatic trigger delay TRIGger DELay AUTO Query the automatic trigger delay mode Returns 0 OFF or 1 ON SAMPle COUNt lt va ue gt MINimum MAXimum Set the number of readings samples the multimeter takes per trigger Select a number from 1 to 50 000 readings per trigger SAMPle COUNt MINimum MAXimum Query the sample count TRIGger C
67. dings will be cleared when the multimeter is power off The reading memory feature can be used for all measurement functions math operations trigger operations and reading hold How to use the reading memory User can store the readings and access to the stored readings through either the front panel operation or the remote interface operation x Note Each datum stored from 1201 to remote interface will be in a first in and first out condition Front Panel Operation Before using the reading memory feature user needs to select a measurement function or the math function first and then select the trigger mode To store readings use the following steps Press STORE button and the multimeter will start to store the readings produced until the specified number of readings is reached The default number of readings to store is 100 To change this number press CONFIG and then STORE buttons Then use lt and gt buttons to move between the digits and Vand buttons to increase or decrease numbers as desired When ready press ENTER button The default number of readings will be restored when the meter has been turned off The location of the buttons are shown with red rectangle frames in Figure 4 28 95 X Note The MEM annunciator will be lit while the multimeter stores readings and be turned off when the specified number of readings is reached Procedures CONFIG STORE lt NUMBER gt STORE CONFIG lt PRE
68. dress of ram U1701 Any incorrect read back will cause a test failure This error is only readable from the remote interface 603 Front End MCU does not respond The main CPU U1601 attempts to establish serial communications with the front end processor U2001 Communication must function in both directions for this test to pass 604 A D noisy test failed This test configures to the 10V dc range with the internal OV A20ms ADC measurement is performed and the result is checked against a limit of OV 20uV 605 N2 calibration parameter failed This error message indicates that N2 calibration parameter is out of range 606 N3 calibration parameter failed This error message indicates that N3 calibration parameter is out of range 607 Bufferl offset out of range This procedure is to test the offset of buffer U507 The result is checked against a limit of O 0 i1mV 608 Buffer2 offset out of range This procedure is to test the offset of buffer U508 The result is checked against a limit of 0 0 1mV 609 DC gain x1 failed This procedure is to test the tolerance of DC gainx 1 amplifier The limit of gain tolerance is 0 005 610 DC gain x10 failed This procedure is to test the tolerance of DC gainx 10 amplifier The limit of gain tolerance is 0 05 611 DC gain x100 failed This procedure is to test the tolerance of DC gainx 100 amplifier The limit of gain tolerance is 0 5 612 Ohms 500 nA source failed This test configures to the 10V dc range w
69. e Remote Interface Operation Use the following commands to set up the thermocouple configuration SENSe UNIT Cel Far K SENSe UNIT SENSe TCOuple TYPE E J K N R S T SENSe TCOuple RJIUNcion RSELect REAL SIMulated SENSe TCOuple RJIUNcion SIMulated lt va ue gt MINimum MAXimum SENSe TCOuple RJUNcion REAL OFFSet lt value gt MINimum MAXimum 65 4 1 9 Remote Interface Selection The multimeter supports both GPIB and USB interfaces but only one interface can be activated ata time If you are using GPIB you must set the address for the multimeter You can set the address to any value from 0 and 31 The address is set to 11 when the multimeter is shipped from the factory X Note The remote interface can only be set through the front panel operations How to select a remote interface Press MENU and then use lt and to select INTERFACE Then Press ENTER on your choice of USB or GPIB interface How to set address when using GPIB Press MENU and then use lt and gt to access INTERFACE Select GPIB to set address Use lt gt Aand V to adjust the numbers to the desired address Press ENTER to set it 4 1 10 Input Terminal Switch Definition User can select either the front input terminals or the rear input terminals for their measurements There are 5 input terminals in the front panel as well as the rear panel If the rear terminal is enabled the REAR annunciator at the upper side will be shown De
70. e CURRent DC lt range gt MIN MAX DEF lt lt resolution gt MIN MAX DEF Preset and configure the multimeter for DC current measurements with the specified range and resolution This command does not initiate the measurement CONFigure CURRentAC lt range gt MIN MAX DEF lt lt resolution gt MIN MAX DEF Preset and configure the multimeter for AC current measurements with the specified range and resolution This command does not initiate the measurement For AC measurement resolution is fixed at 612 digits Therefore the resolution parameter only affects the front panel display CONFigure RESistance lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF Preset and configure the multimeter for 2 wire 9 measurements with the specified range and resolution This command does not initiate the measurement CONFigure FRESistance lt range gt MIN MAX DEF lt lt resolution gt MIN MAX DEF Preset and configure the multimeter for 4 wire 9 measurements with the specified range and resolution This command does not initiate the measurement CONFigure FREQuency lt range gt MIN MAX DEF lt lt resolution gt MIN MAX DEF Preset and configure the multimeter for frequency measurements with the specified range and resolution This command does not initiate the measurement For frequency measurements the meter uses only one range for all inputs between 3Hz and 300kHz With no input signal applied frequency m
71. e NULL LIMit MXB DB DBM FUNCtion STATe OFF ON STATe CALCulate PERCent TARGet lt va ue gt MINimum MAXimum PERCent TARGet MINimum MAXimum CALCulate AVERage MINimum AVERage MAXimum 121 AVERage AVERage AVERage COUNt CALCulate NULL OFFSet lt value gt MINimum MAXimum NULL OFFSet MINimum MAXimum CALCulate LIMit LOWer lt value gt MINimum MAXimum LIMit LOWer MINimum MAXimum LIMit UPPer lt value gt MINimum MAXimum LIMit UPPer MINimum MAXimum CALCulate MXB MMFactor lt va ue gt MINimum MAXimum MXB MMFactor MINimum MAXimum MXB MBFactor lt va ue gt MINimum MAXimum MXB MBFactor MINimum MAXimum CALCulate DB REFerence lt value gt MINimum MAXimum DB REFerence MINimum MAXimum CALCulate DBM REFerence lt value gt MINimum MAXimum DBM REFerence MINimum MAXimum DATA FEED RDG_STORE CALCulate DATA FEED TRIGGERING 1201 provides a variety of trigger operations for user User can select a trigger mode a trigger source and different trigger settings for a specific measurement Refer to Figure 4 8 for triggering system flow chart Triggering from a remote interface is a multi step sequence You must first configure the mulitmeter by choosing the desired function range and resolution Specify the trigger source from which the multimeter will 122 accept the trigger The multimeter takes immediate internal trigger a software trigger fr
72. e multimeter waits before it makes a measurement through the first defined channel The configuration made by user is stored in a volatile memory and will be cleared after the meter is turned off 98 a far uer mma nn pet Mote Front or rear terminals can be used she ut 2 only for 4 Wired Res Measurement _ E g b ai Oe Hote This card must be insert into PICOTEST MS500A X Note The output 2 is only for 4 wired resistance measurement Please refer to the above picture for more connection information When you use 4 wired resistance measurement with scanner card please note that the channel 1 is relative to the channel 6 channel 2 to channel 7 and SO On X Note Setting range of scanner card is only limited on DCV DCI ACV ACI and Resistance functions As to the current measurements users can install current shunts on the circuit board R1 and R2 to allow indirect AC and DC current measurements to be made through channels 1 and 6 only Remark 1 In the default situation current shunts are not installed in the scanner card Remark 2 When the current shunts are installed the channel 1 and channel 6 will be limited to the current measurement unless users release the shunts of the R1 and R2 X Note The Information regarding the Limitation of Input Signals in Scanner Card is in the following statement 10 Channels 10 channels of 2 pole relay input All channels configurable to 4 pole
73. ead the 1201 identification string len 64 pStrout new char len ZeroMemory pStrout len strcpy pStrout idn status PviWrite_usb m_instr_usbtmc unsigned char pStrout 6 amp nWritten Sleep 30 if status VI_SUCCESS MessageBox NULL Write to device error 1201 multimeter device test MB_OK else PviClose_usb m_defaultRM_usbtmc hUSBTMCLIB NULL m_defaultRM_usbtmc 0 return printf output IDN n Sleep 1000 Read data from device len 64 if NUSBTMCLIB status PviRead_usb m_instr_usbtmc pStrin len amp nRead if nRead gt QO for len 0 len lt long nRead len buffer len pStrin len buffer nRead 0 printf input s n n buffer 176 Set sample count to 1 strcpy pStrout SAMP COUN 1 status PviWrite_usb m_instr_usbtmc unsigned char pStrout 12 amp nWritten Sleep 30 Set configure Voltage AC range 0 1A strcpy pStrout CONF VOLT AC 0 1 0 01 status PviWrite_usb m_instr_usbtmc unsigned char pStrout 22 amp nWritten Sleep 3000 Set configure frequency range Auto strcpy pStrout CONF FREQ status PviWrite_usb m_instr_usbtmc unsigned char pStrout 10 amp nWritten Sleep 3000 Set configure Current DC range 0 1A strcpy pStrout CONF CURR DC 1 0 01 status PviWrite_usb m_instr_usbtmc unsigned char pStrout 20 amp nWritt
74. easurements return 0 144 CONFigure PERiod lt range gt MIN MAX DEF lt lt resolution gt MIN MAX DEF Preset and configure a period measurement with the specified range and resolution This command does not initiate the measurement For period measurements the meter uses only one range for all inputs between 0 33 seconds and 3 3 usec With no input signal applied period measurements return 0 CONFigure CONTinuity Preset and configure for a continuity measurement This command does not initiate the measurement The range and resolution are fixed at 1kQ and 5 digits respectively CONFigure DIODe Preset and configure for a diode measurement This command does not initiate the measurement The range and resolution are fixed at 1Vdc with 1mA current source and 5 2 digits respectively CONFigure TEMPerature Preset and configure for a RTD measurement This command does not initiate the measurement The resolution is fixed at 61 2 digits CONFigure TCOuple Preset and configure for a thermocouple measurement This command does not initiate the measurement The resolution is fixed at 61 digits CONFigure Query a recent condition of function and return a quoted string C 5 The Measurement Configuration Command SENSe FUNCtion lt function gt Select a measurement function and enclose it in quotes in the command string FUNC VOLT DC Use one of the following strings VOLTage DC VOL
75. en Sleep 3000 Fetch the 1201 measure value screen value Set Voltage DC measure strcpy pStrout CONF VOLT DC 0 1 0 1 status PviWrite_usb m_instr_usbtmc unsigned char pStrout 21 amp nWritten Sleep 1000 Send read command strcpy pStrout READ status PviWrite_usb m_instr_usbtmc unsigned char pStrout 6 amp nWritten Sleep 30 177 printf output READ n status PviRead_usb m_instr_usbtmc pStrin 64 amp nRead if nRead gt 0 for len 0 len lt long nRead len buffer len pStrin len buffer nRead 0 printf input s n n buffer Set device to local mode strcpy pStrout system local status PviWrite_usb m_instr_usbtmc unsigned char pStrout 13 amp nWritten free pStrout Close device if HUSBTMCLIB return m_nCount 0 m_defaultRM_usbtmc 0 FreeLibrary HUSBTMCLIB hUSBTMCLIB NULL return 178
76. ent Q2 Selects 2 wire resistance measurement FREQ Selects frequency measurement CONT Selects the continuity test TEMP Selects RTD temperature measurement 2 2 First row with SHIFT button DCI Selects DC current measurement ACI Selects AC current measurement Q4 Selects 4 wire resistance measurement PERIOD Selects period measurement gt Selects diode testing TCOUPL Selects thermocouple temperature measurement 2 3 Second row without SHIFT button FILTER Enable or disable the digital filter 27 DIGITS Changes resolution RATIO Enables the dcv dcv ratio function Calculates the ratio to a target value in percentage MIN MAX Captures the minimum or maximum readings from the measurement NULL Activates the offset function in order to get the real measured reading 2 4 Second row with SHIFT button STEP Scans from a channel to the next channel in delayed action when using the scanner card SCAN Enables scanning function when using the scanner card LIMITS Used for Setting upper and lower limit values for readings MX B Used for calculating slope X is the normal display reading M and B are constants specified by user for scale factor and offset dBm Used for displaying voltage measurement in dBm power unit dB Used for displaying voltage measurement in decibel unit 2 5 Third row without SHIFT button SINGLE Manually triggers the multimeter to make measurements AUTO TRIGGER I
77. er is power off Please refer to Table 2 1 on page 24 for the factory default range 62 How to set the auto manual range You can set the auto manual range either through the front panel operation or through the remote interface operation Front Panel Operation First choose a measurement function on the front panel then press AUTO button to select auto range feature Or use A and V buttons to manually select a range If selected range is not shown on the bottom of the display press round PREV or NEXT buttons until the range information appears The locations of these buttons are shown with a red rectangle frame in Figure 4 6 AUTO ir i NJ Ly i i i At OVW fi Noe Nt F J a i i F ih 1 MM j a A j i a a A LR j ee ae LONIDE F l Figure 4 6 Remote Interface Operation Use the following commands from your PC terminal to set the range CONFigure lt function gt lt range gt lt resolution gt MEASure lt function gt lt range gt lt resolution gt SENSe lt function gt RANGe lt range gt SENSe lt function gt RANGe AUTO OFF ON 4 1 7 Rate Integration Time Definition Integration time is the period of time the analog to digital A D converter takes to sample the input signal The integration time feature allows user to optimize either the speed or the resolution as well as the 63 noise rejection
78. est leads to the terminals as shown in Figure 3 6 2 wire or Figure 3 7 4 wire Set RESOLUTION Refer to 4 1 3 or skip this step if default is to be used Press Q2 button for 2 wire measurement or SHIFT Q2 buttons for 4 wire measurement Select the auto range function by pressing AUTO button on the front panel or use A and V buttons to select the desired range BO Connect test leads to your source signal and observe the reading shown on the display If the input signal is greater than the allowed range an overflow message OVLD will be displayed 38 O oS 2 Resistance l ml l Under Test i _ i i i e SSS ee O m Note Source current flows from the INPUT HI to INPUT LO terminals Figure 3 6 2 Q4 Resistance e Under Test Note Source current flows from the INPUT HI to INPUT LO terminals Figure 3 7 X Note The rear terminal panel also can be used via the same procedures like the front panel as shown in Figures 3 8 and 3 9 39 n j i l Ih ra m t 2 wire resistance measurement Figure 3 8 f T Pre j 4 1 f I 1 ce L f 1 k J J n _ z 1E ff 7 m k OT a 4 wire resistance measurement Figure 3 9 3 4 Frequency amp Period Measurements 1201 uses an on board counter with 25MHz to measure the frequency period The measurement band is from 3Hz to 300kKHz or 333 ms to 3 3 us and the measurement voltages range fro
79. et the relative value to any number between 0 dBm and 200 dBm CALCulate DB REFerence MINimum MAXimum Query the dB relative value CALCulate DBM REFerence lt value gt MINimum MAXimum Set the dBm reference value Choose from 50 8000 ohms CALCulate DBM REFerence MINimum MAXimium Query the dBm reference value DATA FEED RDG_STORE CALCulate Selects whether readings taken using the INITiate command are stored in the multimeter s internal memory default or not stored at all In the default state DATA FEED RDG_STORE CALC up to 2000 readings are stored in memory 154 when INITiate is executed The MEASure And CONFigure commands automatically select CALC With memory disabled DATA FEED RDG_STORE readings taken using INITiate are not stored This may be useful with the Min Max operation since it allows you to determine an average of the readings without storing the individual values An error will be generated if you attempt to transfer readings to the output buffer using the FETCh command DATA FEED Query the reading memory state Return CALC or C 7 The Triggering Commands INITiate Change the state of the triggering system from the idle state to wait for trigger state The meter will start to make measurements when a required triggering condition is met after the INITiate command is received Readings are stored in memory until you are ready to rea
80. false failures when current inputs are applied during self test 617 Ohms 100 uA source failed This test configures to the 1000V dc range with the internal 10M 100 1 divider R204 connected across the input The 100 uA ohms current source is connected The compliance limit of the current source is measured A 20ms ADC measurement is performed and the result is checked against a limit of 0 12V 0 01V 618 DC high voltage attenuator failed This test configures to the 1000 V dc range The 500nA ohms current source is connected to produce a nominal 5V signal A 20ms ADC measurement is performed and the result is checked against a limit of 5V 1V 110 619 Ohms 1 mA source failed his test configures to the 1000V dc range with the internal 10M 100 1 divider R204 connected across the input The 1mMA ohms current source is connected The compliance limit of the current source is measured A 20ms ADC measurement is performed and the result is checked against a limit of 0 12V 0 01V 620 AC rms zero failed This test configures for the 100mV ac range with the ac input grounded The internal residual noise of the ac section is measured and checked against a limit of 10mV to 7OmvV at the output of the rms to dc converter 621 AC rms full scale failed This test configures for the 100mV ac range The 1mA ohms current source is switched on to charge the ac input capacitor C614 This produces a pulse on the output of the rms to dc converter which is sampled 100m
81. fault The default situation is the front terminals How to switch the terminals To switch between the front and the rear input terminals press 69 TERMINALS switch button on the front panel Please see the following figure for the location of the switch The location of the button and terminals is shown with a red rectangle frame in Figure 4 7 i K F z es ad ji t A oy Re r W E i F Ai i jm aif l D 0 Figure 4 7 4 2 Trigger Operations In this section we will discuss the triggering system in 1201 1201 provides a variety of trigger operations for user User can select a trigger mode a trigger source and different trigger settings for a specific measurement The user s selection is stored in a volatile memory and the default settings will be restored after power off Figure 4 8 shows the trigger operation in 1201 Waiting for event Delay Sampling Trigger 1 Samples 1 Sample 1 Trigger 1 Trigger Operation Flow Chart Figure 4 8 4 2 1 Trigger Mode 70 There are three trigger modes in 1201 auto immediate and single triggering User can specify the trigger mode for their measurement The factory default is auto triggering when the meter is power on A Auto Triggering Mode Front Panel Operation only Definition Auto triggering takes continuous readings at a fastest rate possible for the present measurement The rate
82. fference between each type is subject to the patch thermal leads X Note Only connection via the front panel can be used for temperature measurements How to measure thermocouple Use terminals switch to select terminals on the front panel To measure thermocouple must be via thermocouple adapter and the low thermal patch leads as shown in Figure 3 12 When the mentioned modules are well connected as the following figure please go to the next step Configure the thermocouple type and unit using CONFIG SHIFT TEMP such as K TYPE and C When ready press ENTER button 44 4 Press SHIFT TEMP buttons Take the reading on the display Figure 3 12 3 7 2 RTD Measurements There are three kinds of temperature measurements with RTDs 2 wire 3 wire and 4 wire measurements You will find connection instructions and measuring procedures in the following sections 3 7 2 1 2 Wire RTD Measurements How to measure temperature with 2 Wire RTD The following Figure 3 13 shows theory diagram of 2 Wire RTD measurement Use terminals switch to select front terminals Insert a specified adapter into the front terminals Connect the low thermal patch leads to the adapter as shown in Figure 3 14 8 Configure sensor type and unit using CONFIG TEMP and lt or gt When ready press ENTER button 4 Press TEMP button Place RTD in the desired position and take the reading on the dis
83. hat the user selected value is stored in a volatile memory The default setting will be restored after the meter has been turned off How to set the DC input resistance You can set the DC input resistance either through the front panel operation or through the remote interface operation Front Panel Operation Press CONFIG DCV and then use lt and gt buttons to locate INPUT R option Press ENTER to select it Then select desired value for the input resistance by pressing lt or gt button Press ENTER to choose it Two values are available 10M Q or gt 10G Q The locations of these buttons are shown with red rectangle frames in Figure 4 4 60 r al _ ate a HO W 3 p i E i hi ii F Wha a i i L T ji i Figure 4 4 Remote Interface Operation The automatic input resistance mode can be enabled disabled With AUTO OFF default the input resistance is fixed at 10MQ for all ranges With AUTO ON the input resistance is set to gt 10GQ for the three lowest DC voltage ranges 100mV 1V and 10V Use the following command from your PC terminal to disable the auto input DC resistance setting the result is a fixed input DC resistance at 10M Q for all measurements INPut IMPedance AUTO OFF ON 4 1 5 Threshold Resistance Continuity Definition When testing continuity the beeper goes off when the measured resistance is less than the threshold resistance The thresho
84. he Status Byte and Standard Event register enable masks when power is turned on PSC 1 When PSC 0 is in effect the Status Byte and Standard Event register enable masks are not cleared when power is turned on Stored in non volatile memory PSC Query the power on status clear setting Returns 0 PSC 0 or 1 PSC 1 SRE lt enable value gt Enable bits in the Status Byte enable register SRE Query the Status Byte enable register The multimeter returns a decimal value which corresponds to the binary weighted sum of all bits set in the register STB Query the Status Byte summary register The STB command is Similar to a serial poll but it is processed like any other instrument command The STB command returns the same result as a serial poll but the request service bit bit 6 is not cleared if a serial poll has occurred C 10 SCPI Compliance Information This section encloses a list of commands that are device specific to the 1201 Although not included in the 1999 0 version of the SCPI standard these commands are designed with the SCPI format in mind and they follow all of the syntax rules of the standard 160 Many of the required SCPI commands are accepted by the multimeter but are not described in this manual for simplicity or clarity Most of these non documented commands duplicate the functionality of a command already described in this chapter MEASure CONTinuity DIODe SAMP
85. he input signal is beyond the allowed range an overflow message OVLD will be displayed DC Voltage Source Input Resistance 10MQ on 1000V and 100V ranges gt 1062 on 10V 1V and 100mV ranges Figure 3 1 AC Voltage Source Input Impedence 1M2 in parallel with lt 100pF Warning Maximum Input 750V RMS 1000V peak 8 x 10 V Hz Figure 3 2 X Note The rear panel terminals can also be used via the same procedures as the front panel terminals Refer to Figure 3 3 35 VM Voltage Measurement Figure 3 3 3 2 Current Measurements DC amp AC The ranges for DC current measurements in 1201 are 10mA 100mA 1A and 3A For AC current measurements the range is 1A with a sensitivity of 1 uA to 3A AC Coupled TRMS with a sensitivity of 10uA Figure 3 4 and 3 5 show you how to measure DC AC currents in 1201 A Warning The maximum input current allowed is 3A 250V Do not apply excess current to your meter to avoid damaging the fuse of current input X Note To eliminate the thermal EMFs due to the differences between two metals use copper leads to connect your source signal to the meter How to measure current Selects input signal connections on front or rear panel Connect the test leads to the terminals as shown in Figure 3 4 8 Set RESOLUTION of DCI Refer to 4 1 3 BANDWIDTH of ACI Refer to 4 1 2 1 or skip this step if default is to be used Press SHIFT DCV or SHIFT ACV buttons f
86. how to use the Min Max operation from your PC terminal CALCulate FUNCtion AVERage CALCulate STATe OFF ON CALCulate STATe 82 CALCulate AVERage MINimum CALCulate AVERage MAXimum CALCulate AVERage AVERage CALCulate AVERage COUNt 4 3 4 Null Definition When null function is enabled the displayed measurement reading is the difference between the measured input signal reading and the stored null also called relative value The null relative value is stored in a volatile memory and the value will be cleared when the multimeter is power off Moreover user can specify or alter a null value The null feature is available for all functions except continuity diode When user selects the null feature for a measurement it is visible only for this measurement How to use null relative measurement You can activate null feature from either the front panel operation or the remote interface operation The Front Panel Operation The null measurements can be used with any function except continuity and diode To store the null test lead resistance short the two test leads together and then press NULL button The new reading taken will replace the old value if any in the null register Then connect the two test leads to the input source The value with null offset will show on the display In addition the null offset value can be adjusted manually by pressing CONFIG then NULL Use lt and gt buttons to move through the digits
87. ight middle seam as shown in Figure 2 3 You might need a screwdriver to do so 18 Figure 2 3 Step 4 Turn it over to 220V position as shown in Figure 2 4 Step 5 Insert the voltage setting selector back into the socket and close the cap as shown in Figure 2 5 f Figure 2 5 19 2 1 2 2 To change the fuse A Warning Before replacing the power line fuse make sure the multimeter is disconnected from the AC power You must be a qualified personnel to perform this action A Warning For continued protection against fire or instrument damage only replace fuse with the same type and rating If the instrument repeatedly blows fuses locate and correct the cause of the trouble before replacing the fuse Verify that the power line fuse is good Replace the fuse if it is damaged Use only the same type and same rating fuse noted on the rear panel Please follow the steps below to change the fuse Step 1 Verify that the meter is disconnected as shown in Figure 2 6 te SS en el ee ae a a Figure 2 6 20 Step 2 Open the voltage setting selector cap as shown in Figure 2 7 You might need a screwdriver to do so Figure 2 7 Step 3 Remove the red voltage setting selector from the right middle seam as shown in Figure 2 8 You might need a screwdriver to do so ry Tih h ae ou SENOS S G E SRS YZ ye Sy fs Oak Figure 2 8 21 Step 4 Remo
88. imeter MsgBox Read in data error vbExclamation 1201 multimeter device test stat viClose fList Exit Sub End If Rem set to local mode stat viWrite sesn system local 12 ret If stat lt VI_SUCCESS Then MsgBox System command error system local vbExclamation 1201 multimeter device test stat viClose fList Exit Sub End If stat viClose sesn stat viClose fList 170 stat viClose dfltRM For i 0 To 5 1 print out the 5 times samples reading Debug Print Rdgs Mid readin i 16 1 15 Next i MsgBox End of Job End Sub C DEVQUERY Sample Application This C sample application is a Win32 console application It illustrates how to use the BERKELEY NUCLEONICS CORPORATION IOUtils COM A Win32 console application is a Win32 application which uses text based input and output not a graphical interface This allows you to quickly create a Win32 application by using simple input and output functions Creating the Application Create a new Visual C project as follows 1 Create a new Win32 Console Application project calling the project DEVQUERY 2 Specify that this project will be a simple application in the last AppWizard step LISTING D 3 THE DEVQUERY FUNCTION devquery cpp Defines the entry point for the console application Call the NI VISA library visa32 dll include stdafx h include visa h standard include for a Microsoft Visua
89. indicates the state of a mathematical feature excluding Ratio and will be lit by enabling whichever math feature Also press the same buttons again for the enabled math feature will disable the same math feature 78 X Note Press RATIO button the RATIO anunnciator will be lit on the display 4 3 1 Ratio This function calculates the ratio of an input DC voltage to a reference DC voltage according to the following equation DC Input Voltage kat100686Omeeeeeeeeooooee DC Reference Yoltage How to make a ratio measurement There are two ways to make a ratio measurement Through the front panel operation or through the remote interface operation Front Panel Operation Use TERMINALS button to select the front terminals or the rear terminals Press CONFIG RATIO and then use lt and gt buttons to locate RESOLUTION option Refer to 4 1 3 and FILTER option Refer to 4 1 2 2 Press ENTER to make choices Then select desired value for it by pressing lt gt A and V button Press ENTER to choose it For operating this function please press RATIO button and observe the reading on the display as shown as Figure 4 14 X Note To close this function please press one of the measurement function buttons 79 ONFIG RATIO IE PREV NEXT ENTER is i eo a a i r yi a fi aT i i ae fy errereen ar A en F li F Sn R i f 1 r Figure 4 14
90. ith the internal 10M 100 1 divider R204 connected across the 109 input The 500nA ohms current source is connected to produce a nominal 5V signal A 20ms ADC measurement is performed and the result is checked against a limit of 5V 1V 613 Ohms 5 uA source failed This test configures to the 1000V dc range with the internal 10M 100 1 divider R204 connected across the input The 5 u A ohms current source is connected The compliance limit of the current source is measured A 20ms ADC measurement is performed and the result is checked against a limit of 0 12V 0 01V 614 DC 1000V zero failed This test configures to the 1000V dc range with no input applied A 20ms ADC measurement is performed and the result is checked against a limit of OV 5 mV 615 Ohms 10 uA source failed This test configures to the 1000V dc range with the internal 10M 100 1 divider R204 connected across the input The 10 u A ohms current source is connected The compliance limit of the current source is measured A 20ms ADC measurement is performed and the result is checked against a limit of 0 12V 0 01V 616 DC current sense failed This test configures to the 3A dc range A 20ms ADC measurement is performed and the result is checked against a limit of OA 5A This test confirms that the dc current sense path is functional The test limit is set wide because K303 does not open the current input during self test This test should catch a dc current sense failure without causing
91. ix upper and lower case letters Query responses will always return the short form in all upper case letters The following command uses discrete parameters TRIGger SOURce BUS IMMediate EXTernal Boolean Parameters Boolean parameters represent a single binary condition that is either true or false For a false condition the multimeter will accept OFF or O For a true condition the multimeter will accept 140 ON or 1 When you query a boolean setting the instrument will always return 0 or 1 The following command uses a boolean parameter INPut IMPedance AUTO OFF ON String Parameters String parameters can contain virtually any set of ASCII characters A string must begin and end with matching quotes either with a single quote or with a double quote You can include the quote delimiter as part of the string by typing it twice without any characters in between The following command uses a string parameter DISPlay TEXT lt quoted string gt C 2 Output Data Formats Output data will be in one of formats shown in the table below Type of Output Data Non reading queries Single reading IEEE 488 Multiple readings IEEE 488 Single reading RS 232 Multiple readings RS 232 Output Data Format lt 80 ASCII character string SD DDDDDDDDESDD lt nl gt SD DDDDDDDDESDD lt nl gt SD DDDDDDDDESDD lt cr gt lt nl gt SD DDDDDDDDESDD lt cr gt lt nl gt S Negative sign o
92. l Install the 1201 application in your PC and execute the program Click Tool tab for Command Control then type in your command The icons and buttons are shown with red rectangle frames in Figures 5 1 5 2 and 5 3 5 3 Remote Interface Commands User can instruct the multimeter to take measurements using the SCPI commands after the appropriate setup for their selected remote interface The following conventions are used in SCPI command syntax Triangle brackets lt gt indicates that you must specify a value for the enclosed parameter The square brackets indicates that the parameter is optional and can be omitted The braces enclose the parameter choices for a given command string A vertical bar separates several choices for a parameter The MEASure Command Although it does not offer much flexibility using the MEASure Command is the simplest way to program the multimeter for measurements You select the measurement function range and resolution the multimeter 114 automatically sets the other parameters for you make the measurement and send the result to the output buffer MEASure VOLTage DC lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF VOLTage DC RATio lt range gt MIN MAX DEF 4 lt resolution gt MIN MAX DEF VOLTage AC lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF CURRent DC lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF CURRent AC lt range gt
93. l C project include stdio h include windows h 171 void main int argc char argv TODO Add your control notification handler code here HINSTANCE hUSBTMCLIB for USBTMC HANDLE unsigned long m_defaultRM_usbtmc m_instr_usbtmc unsigned long m_findList_usbtmc unsigned long m_nCount ViStatus status int m_Timeout 7000 char poStrout Write out data buffer BYTE pStrin 64 Read in data buffer int len ULONG nWritten ULONG nRead 0 char buffer 256 char instrDescriptor 256 Load the NI VISA library for USBTMC device hUSBTMCLIB LoadLibrary visa32 dll if HUSBTMCLIB MessageBox NULL NIVISA for USBTMC library not found 1201 multimeter device test MB_OK return Link the libraries Signed long __stdcall PviOpenDefaultRM_usb unsigned long vi Signed long __stdcall PviFindRsrc_usb unsigned long sesn char expr unsigned long vi unsigned long retCnt char far desc signed long __stdcall PviOpen_usb unsigned long sesn char name unsigned long mode unsigned long 172 timeout unsigned long vi signed long __stdcall PviClose_usb unsigned long vi signed long __stdcall PviWrite_usb unsigned long vi unsigned char name unsigned long len unsigned long retval signed long __stdcall PviRead_usb unsigned long vi unsigned char name unsigned long len unsigned long retval signed long __stdcall
94. l always reset the current SCPI command path to the root level 139 IEEE 488 2 Common Commands The IEEE 488 2 standard defines a set of common commands that perform functions like reset self test and status operations Common commands always begin with an asterisk are four to five characters in length and may include one or more parameters The command keyword is separated from the first parameter by a blank space Use a semicolon to separate multiple commands as shown below RST CLS ESE 32 OPC SCPI Parameter Types The SCPI language defines several different data formats to be used in program messages and response messages Numeric Parameters Commands that require numeric parameters will accept all commonly used decimal representations of numbers including optional signs decimal points and scientific notation Special values for numeric parameters like MINimum MAXimum and DEFault are also accepted You can also send engineering unit suffixes with numeric parameters e g M K or u If only specific numeric values are accepted the multimeter will automatically round the input numeric parameters The following command uses a numeric parameter VOLTage DC RANGe lt range gt MINimum MAXimum Discrete Parameters Discrete parameters are used to program settings that have a limited number of values like BUS IMMediate EXTernal They have a short form and a long form just like command keywords You can m
95. ld resistance can be set to any value between 12 and 1000Q Default The factory default for continuity threshold resistance is 109 User s selection is stored in a volatile memory and the default value will be restored after the meter has been turned off How to set the threshold resistance User can change the threshold resistance only through the front panel 61 Press CONFIG button and then CONT button Use lt and gt buttons to move through the digits and lower or increase the number to your desired value using A and YV buttons then press ENTER button to set the value The locations of these buttons are shown with red rectangle frames in Figure 4 5 PREV NEXT gt 4 ES Figure 4 5 4 1 6 Range Manual and Auto Definition When making measurements except CONT DIODE and Temperature you can let the machine choose ranges for you or you can select the appropriate ranges manually by yourself The difference between auto range and manual range is the settling time Auto range is a convenient way for user but manual range can usually speed up the process If the input signal is beyond allowed range an OVLD message will be shown on the display The threshold of maximum minimum readings for each range are 120 of the range for maximum and 10 of the range for minimum Default The default is auto range The user selected range is stored in volatile memory and the default will be restored when the met
96. le COUNt lt va ue gt MINimum MAXimum COUNt MINimum MAXimum SENSe FUNCtion CONTinuity FUNCtion DIODe FREQuency VOLTage RANGe lt range gt MINimum MAXimum FREQuency VOLTage RANGe MINimum MAXimum FREQuency VOLTage RANGe AUTO OFF ON FREQuency VOLTage RANGe AUTO PERiod VOLTage RANGe lt range gt MINimum MAXimum PERiod VOLTage RANGe MINimum MAXimum PERiod VOLTage RANGe AUTO OFF ON PERiod VOLTage RANGe AUTO ZERO AUTO CALCulate PERCent TARGet lt va ue gt MINimum MAXimum PERCent TARGet MINimum MAXimum AVERage MINimum AVERage MAXimum AVERage AVERage AVERage COUNt NULL OFFSet lt value gt MINimum MAXimum NULL OFFSet MINimum MAXimum LIMit LOWer lt value gt MINimum MAXimum LIMit LOWer MINimum MAXimum 161 LIMit UPPer lt value gt MINimum MAXimum LIMit UPPer MINimum MAXimum MXB MMFactor lt va ue gt MINimum MAXimum MXB MMFactor MINimum MAXimum MXB MBFactor lt va ue gt MINimum MAXimum MXB MBFactor MINimum MAXimum DB REFerence lt value gt MINimum MAXimum DB REFerence MINimum MAXimum DBM REFerence lt value gt MINimum MAXimum DBM REFerence MINimum MAXimum CONFigure CONTinuity DIODe INPut IMPedance AUTO OFF ON IMPedance AUTO C 11 IEEE 488 Compliance Information IEEE 488 2 Common Commands CLS ESE lt enable value gt ESE ESR IDN OPC OPC PSC 0 1 PSC RST SRE lt enable value gt 162
97. limit MAX Press ENTER to select the 84 limit you wish to set Then use lt and gt to move through the digits and A and V to increase or decrease the numbers to a desired value Press ENTER to set the value The locations of the buttons are shown with red rectangle frames in Figure 4 18 RATIO C ONFI lt PREV NEXT gt Figure 4 18 How to make a limit testing The locations of the buttons are shown with red rectangle frames in Figure 4 19 Select a measurement function for purpose except continuity and diode Enable the limit operation by pressing SHIFT RATIO buttons After enabling the limit function user can set the limit value as mentioned above Observe the displayed reading X Note Press SHIFT RATIO again to disable this feature The MATH anunnciator on the display indicates the state of a mathematical feature TEMP Sue MIN MAX 85 Figure 4 19 Remote Interface Operation Use the following commands to enable the limits function or to set the limits CALCulate FUNCtion LIMit CALCulate STATe OFF ON CALCulate STATe CALCulate LIMit LOWer lt va ue gt MINimum MAXimum CALCulate LIMit UPPer lt va ue gt MINimum MAXimum 4 3 6 MX B Definition This mathematical function multiplies a measurement reading X by a specified scale factor M and add an offset B automatically The answer Y will then be sh
98. lt function gt RESolution MINimum MAXimum Query the resolution for the selected function SENSe UNIT Cel Far K Select units for temperature measurement Cel means Celsius Far means Fahrenheit and K means Kelvin SENSe UNIT Query units for temperature measurement 146 SENSe TCOuple TYPE E J K N R S T Select thermocouple sensor type SENSe TCOuple TYPE Query thermocouple sensor type SENSe TCOuple RJUNction RSELect REAL SIMulated Select a reference junction type real or simulated SENSe TCOuple RJUNction RSELect Query the reference junction type real or simulated SENSe TCOuple RJUNction SIMulated lt value gt MINimum MAXimum Set the default temperature of the simulated reference junction SENSe TCOuple RJUNction SIMulated Query the default temperature of the simulated reference junction SENSe TCOuple RJUNction REAL OFFSet lt value gt MINimum MAXimum Set the offset voltage of the real reference junction SENSe TCOuple RJUNction REAL OFFSet MINimum MAXimum Query the offset voltage of the real reference junction SENSe TEMPerature RTD TYPE PT100 D100 F100 PT385 PT3916 USER SPRTD NTCT Select the RTD type for temperature measurement with RTD SENSe TEMPerature RTD TYPE Query the RTD type for temperature measurement with RTD SENSe TEMPerature RTD RZERo lt va ue gt MINimum MAXimum Set the R Zero constant for the user defined RTD type
99. lution Resistance 23 C 5 C senate 00000mA 100 nA Ese ee 0 050 0 005 DCI DC 1 Year Range Resolution Test Current 23 C 5 C 100 0000 Q 100 uQ 0 010 0 004 10 00000 KQ 10 mQ 100 uA 0 010 0 001 100 0000 KQ 100 MQ 10 uA 0 010 0 001 Resistance 1 000000 MQ 0 010 0 001 10 00000 MQ 500 nA 0 040 0 001 100 Q 500 nA 10 100 0000 MQ 0 800 0 010 Diode Test 1 0000V 10 uV 0 010 0 020 1000 00KQ 10 mQ 0 010 0 030 4 a Specifications are for 4 wire ohms For 2 wire ohms use Math Null function b Max Lead Resistance 10 of range per lead for 1009 and 1KQ ranges 1kQ per lead for all other ranges c Input protection 1000 V all ranges 133 Frequency and Period Characteristics Accuracy of reading 1 Year 23 C 5 C Frequency amp Period AC Characteristics 7 Accuracy of reading of range 1 Year Range Resolution dae i Hz 23 C 5 C ACV AC EE 1 soosoo 0 04 TRAS 100 0000mV 0 1 uV 9 5 10 Conana 0 35 0 04 5 Specifications are for 6 1 2 digits and two hours warm up 6 20 over range on all ranges except 750 Vac range 7 Specifications are for 6 1 2 digits and two hours warm up slow AC filter 3 Hz Bandwidth sine wave input g 20 over range on all ranges except 750 Vac range 9 Specifications are for sine wave input gt 5 of range When the inputs are from 1 to 5 of range and lt 50 KHz add the additional error for 134
100. m 100mvV to 750 V in AC The default for RANGE is auto range A Warning The maximum input allowed is 1000V Applying excess voltage may damage your meter How to measure frequency and period Selects input signal connections on front or rear panel Connect the test leads to the terminals as shown in Figure 3 2 40 Set RESOLUTION Refer to 4 1 1 and INPUT JACK Or skip this step if default is to be used Press FREQ button for frequency measurement or SHIFT FREQ buttons for period measurement Select the auto range function by pressing AUTO button on the front panel or use A and V buttons to select the desired range 00 amp Connect test leads to your source signal and observe the reading shown on the display If the input signal is beyond the allowed range an overflow message OVLD will be displayed X Note The rear terminal panel also can be used via the same procedures as the front panel Please refer to Figure 3 3 3 5 Continuity Measurements 1201 uses 1 K Q range for the continuity measurement The meter beeps when the test resistance is less than the threshold resistance The default threshold resistance is 108 but user can set the threshold resistance to anything between 1 Q and 1 K Q The resistance value set by user is stored in a volatile memory and will be cleared after the meter has been turned off The source current for the continuity measurement is 1 mA AN Warning The maximum i
101. m BEEPer STATe OFF ON Disable or enable the beeper SYSTem BEEPer STATe Query the beeper mode Returns O OFF or 1 ON SYSTem ERRor Query the multimeter s error queue Up to 20 errors can be stored in the queue Errors are retrieved in first in first out FIFO order Each error string may contain up to 80 characters SYSTem VERSion Query the present SCPI version LO Set to the default identification string L1 Set to the compatible identification string SYSTEM IDNSTR Manufacturer Product Change the multimeter s identification string such as the maker s and the product s names be sure to dimension a string variable with at most 39 characters DATA POINts Query the number of readings stored in the multimeter s internal memory RST Reset the multimeter to the power on configuration This command can not clear the error queue IDN Read the multimeter s identification string be sure to dimension a string variable with at least 35 characters Other Interface Commands SYSTem LOCal Place the multimeter in the oca mode All buttons on the front panel are fully functional SYSTem REMote Place the multimeter in the remote mode All buttons on the front panel except the LOCAL button are disabled C 9 Status Reporting Commands 158 SYSTem ERRor Query the multimeter s error queue Up to 20 errors can be stored in the queue Errors are retrieved in first in fir
102. measurement function Default The default value for the resolution is slow 5 5 digit and the default value will be restored when the meter has been turned off or after a remote interface reset The user selected value for the resolution setting is stored in a volatile memory and the setting is only valid for the current measurement function Please refer to Table 2 1 on page 24 X Note The resolution setting for AC measurements is actually fixed at 6 Y2 digits When user selects a lower resolution the meter will mask out the extra digits User s selection of resolution for AC function will not affect the actual speed or accuracy How to set the resolution The resolution can be set either through the front panel or the remote interface operation 58 Front Panel Operation There are two ways to set the resolution The locations of the buttons are shown with red rectangle frames in Figure 4 3 A First select your desired measurement function by pressing one of the function buttons located on the first row of your meter s front panel Press DIGITS button to select your desired resolution for your measurement User can press DIGITS button several times to see how the resolution setting changes from 4 5 5 5 to 6 5 Note When using Method A to set the resolution your options are 4 5 slow 5 5 slow and 6 5 fast Press CONFIG and then select a function as you wish from DCV DCI SHIFT DCV Q92 24 SHIFT 92 FREQ an
103. mp Auto Gain eceeeeerees 52 AL SCOT ara a A T a R 55 AA 2k ACHRE nanta cubeass coohexslcanaens Lsuhces Lessecus hoes 55 A ez DIICAL FIE anean aAA 56 4 1 3 Resolution Setting Digits 58 Add DG ANDUC RESISCQNCC aeua adn a a a an aa a 60 4 1 5 Threshold Resistance Continuity 61 4 1 6 Range Manual and Auto 62 4 1 7 Rate Integration THE ccccceecccceeesssssessseccceeseeneeeee ees 63 4 1 8 Sensor Selection for Temperature Measurements 0 65 4179 Remote Interface Selection suse te Mosel Aeneas anaes 69 4 1 10 Input Terminal SWItCH 0 0 ccccccccccccesccsssesscccsscvsssssscccsscessescens 69 4 2 TRIGGER OPERATIONS tncoicic dcihie ei cthieteh ai ee Nias edhe hic ete a eae nile 70 ADid TOG Mode beswen a a a a naa 70 A22 THOGCr SOUKCE errre i a A 2 AZ OJE SOCIO EREET NOT 73 4 3 MATH OPERATION Sigan te acl oe eek ed ee ard oe pele teats 78 Aea RAO Pe rene en Mee eer eo ae ee nee ae econ eee UE ee CSTD a Reamer ee ee 79 rs ono Fo A ex 21g SS 6 ris ORR RPS RE PE OT CRE E Ro RR CREPE 80 Cs We Oke Maan LAL RV A LAL PER Ac eA TMNT AY PRR EE TT AMT ASOT CRN TER NT 8l P NUE a O EE E EE OE N 83 Ee LESS TE S a aa a a e e Gates he T E 84 AO P FD arira E AE 86 A ORADE EEE ANE E TNE TET Ree Cent om 87 4 4 OTHER SYSTEM RELATED OPERATIONS c ccccccessssescceessecsesssssceseeeseessneeeseeess 91 gA T DISD EEE T TA areca aces eee ves 9 AA CCDC L a a A a R 93 4 4 3 Reading Memory Store amp Recall 95 4
104. n enabled The multimeter clears the value when Min Max is turned on when the power has been off or a remote interface reset CALCulate NULL OFFSet lt va ue gt MINimum MAXimum Store a null value in the multimeter s Null Register You must turn on the math operation before writing to the math register You can set the null value to any number between 0 and 120 of the highest range CALCulate NULL OFFSet Query the null value CALCulate LIMit LOWer lt value gt MINimum MAXimum Set the lower limit for limit testing You can set the value to any number from O to 120 of the highest range for the present function CALCulate LIMit LOWer Query the lower limit for the limit testing 153 CALCulate LIMit UPPer lt value gt MINimum MAXimum Set the upper limit for limit testing You can set the value to any number from 0 to 120 of the highest range for the present function CALCulate LIMit UPPer Query the upper limit for the limit testing CALCulate MXB MMFactor lt value gt MINimum MAXimum Set the value of M CALCulate MXB MMFactor MINimum MAXimum Query the value of M CALCulate MXB MBFactor lt value gt MINimum MAXimum Set the value of B CALCulate MXB MBFactor MINimum MAXimum Query the value of B CALCulate DB REFerence lt value gt MINimum MAXimum Store a relative value in the dB Relative Register You must turn on the math operation before writing to the math register You can s
105. nd 5 2 digits respectively MEASure DIODe Preset and make a diode measurement The reading is sent to the output buffer The range and resolution are fixed at 1Vdc with 1mA current source and 5 2 digits respectively MEASure TEMPerature Preset and make a temperature measurement with RTD The reading is sent to the output buffer MEASure TCOuple Preset and make a temperature measurement with thermocouple The reading is sent to the output buffer C 4 The CONFigure Command CONFigure VOLTage DC lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF Preset and configure the multimeter for DC voltage measurements with the specified range and resolution This command does not initiate the measurement CONFRigure VOLTage DCRATio lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF Preset and configure the multimeter for DC DC ratio measurements with the specified range and resolution This command does not initiate the 143 measurement The specified range applies to the source signal and autorange is selected for the reference signal CONFigure VOLTage AC lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF Preset and configure the multimeter for AC voltage measurements with the specified range and resolution This command does not initiate the measurement For AC measurement resolution is fixed at 672 digits Therefore the resolution parameter only affects the front panel display CONFigur
106. nections Separate environmental noises HI amp LO Used for all measurements except DC and AC current Maximum input voltage 1000V for voltage measurements 200V for 4 wire measurement LO amp I Used for making DC and AC current measurements Front Fuse Secures your Meter against damage of strong current pulse Maximum current 3A 250V Chassis Ground Terminal The chassis ground terminal is used for shielding the noise from the nature especially when users want to get a very small signal via the application of a BNC to Banana Adapter Please refer to the Figure 2 16 29 BNC to Banana Adapter Source Chassis Ground Figure 2 16 2 3 2 The Display 1201 has a 5x7 dot matrix dual display with three color White Red and Yellow annunciators for a better view There are two rows in the dual display screen The upper row displays readings and units A maximum 13 characters are allowed for upper row dot matrix display The lower row displays range of the measurements condition or information about an ongoing configuration A maximum 16 characters are allowed for lower row dot matrix display There are additional annunciators at upper side and right side of the display screen for indicating the state or the condition of an ongoing measurement They are explained individually in the following sections AW EXT AUTO pl cw LE Ao LE LETE LEJ Leek yg ATIT LELT TER Ti T E oon T TELT 7 Tia CLET LL
107. nput voltage allowed is 1000 V Applying excess voltage may damage the meter and cause unpredictable hazards How to measure the continuity Selects input signal connections on front or rear panel Connect the test leads to the terminals as shown in Figure 3 2 2 Set REConnect the input signal as the following figure 3 Set threshold resistance via pressing CONFIG CONT buttons Or Skip this step if default resistance is to be used When ready press ENTER button Press CONT button The measured value will be shown on the display automatically Meter O beeps when measured resistance value is lower than threshold 41 Q2 Resistance Under Test Note Source current flows from the INPUT Hi to INPUT LO terminals Figure 3 10 3 6 Diode Measurements 1201 uses a current source of 1 mA for diode testing The maximum resolution is 10 uV on a fixed range of 1 V DC The default threshold voltage is fixed between 0 3 and 0 8 volts and the reading rate is fixed at 0 1 PLC The voltage bound is adjustable from 0 01V up to 1 2V A Beep sound will appear when the diode measured value is in the range A Warning Positive end of the source signal is to be cennected to HI of the input terminals and the negative end to LO of the input terminals How to measure diode Selects input signal connections on front or rear panel Connect the diode to the terminals For forward bias connect the probe fr
108. nstructs the multimeter to make measurements continuously STORE Stores a specified number of subsequent readings RECALL Displays stored readings and buffer statistics Use lt gt or AV searching buttons to toggle between reading number and reading LOCAL Cancels USB or GPIB remote mode SHIFT in blue Used for accompanying other button with upper print in blue and converting function 2 6 Third row with SHIFT button EXTRIG Selects external triggers as the trigger source via BNC port on the rear panel HOLD Holds reading 3 1 The first row in SETUP section lt Scrolls through buffer conceals or reveals the digits while 26 measuring 3 2 The second row in SETUP section ESC Cancels selection moving back to measurement display ENTER Accepts selection moving to next choice or back to measurement display LOCK Presses SHIFT then ESC button to prevent unpredictable operation on the panel In order to release lock condition please press ESC again 3 3 The third row in SETUP section 0e o CONFIG Offers setting or adjusting function relating some front panel buttons MENU Offers setting or adjusting function not relating other front panel buttons RANGE A Moves to higher range V Moves to lower range AUTO Enables or disables auto range Terminals Selects input signal connections on front or rear panel Inserted Connections amp Fuse Device 4 Chassis Ground Con
109. nt AVERage NULL LIMit MXB DB DBM Select the math function Only one function can be enabled at a time The default function is percent CALCulate FUNCtion Query the present math function Returns PERC AVER NULL LIM MXB DB or DBM CALCulate STATe OFF ON Disable or enable the selected math function CALCulate STATe Query the state of the math function Returns O OFF or 1 ON CALCulate PERCent TARGet lt va ue gt MINimum MAXimum Set the target value for percent math function The multimeter clears the value when Min Max is turned on when the power has been off or a remote interface reset 152 CALCulate PERCent TARGet MINimum MAXimum Query the target value for percent math function CALCulate AVERage MINimum Read the minimum value found during the Min Max operation The multimeter clears the value when Min Max is turned on when the power has been off or a remote interface reset CALCulate AVERage MAXimum Read the maximum value found during the Min Max operation The multimeter clears the value when Min Max is turned on when the power has been off or a remote interface reset CALCulate AVERage AVERage Read the average value of all readings taken since the Min Max operation has been enabled The multimeter clears the value when Min Max is turned on when the power has been off or a remote interface reset CALCulate AVERage COUNt Read the number of readings taken since Min Max has bee
110. nterval TIMER and store STORE options Then press ENTER on your selection Use lt and gt to move through the digits and Aand YV to increase or decrease the numbers to a desired value For 102 STORE option you can select ON to instruct the meter to store the measurement results for later retrieving or select OFF Press ENTER to set the value How to open and close the channels Press CONFIG SHIFT FILTER for scanning configuration Use lt and gt buttons to scroll through submenus Press ENTER on when you need to close a specific channel Press ENTER again on CHANNEL Use lt and gt to move through the digits and and YV to increase or decrease the numbers to the desired channel number Press ENTER to close the channel To open all channels simply press ENTER on OPEN ALL option Press SHIFT FILTER to scan as shown as Figure 4 32 PREV NEXT Figure 4 32 4 4 7 Initial Mode The section contains two selections DEFAULT and SAVE DATA You can select SAVE DATE to save the current configuration or select DEFAULT to restore the factory value after restarting 1201 The valid range of SAVE DATA is listed in Table 4 5 Items of Save Data Contents Continuity Threshold Resistance Temperature RTD Sensor Types amp Units Thermocouple Types Units R Junction 103 8 Reading Hold Sensitivity Band 9 Input R DC Input Resistance USB GPIB ADDR R
111. o a desired value Press ENTER to set the value The locations of the buttons are shown with red rectangle frames in Figure 4 23 MIN MAX om _ rik X i a l a J 4 Ja JO Mr i i 1 er a a fy PREV NEXT EM se me y N T E we T Figure 4 23 How to make a dBm measurement Select a measurement function by pressing DCV or ACV button The dBm feature is only available for DCV and ACV only To enable dBm press SHIFT MIN MAX buttons After enabling the dBm operation user can select the reference resistance as mentioned above The default for the reference 90 resistance is 600 Q The locations of the buttons are shown with red rectangle frames in Figure 4 24 X Note Press SHIFT MIN MAX again to disable this feature The MATH anunnciator on the display indicates the state of a mathematical feature 5 Figure 4 24 Remote Interface Operation Use the following commands to enable dBm feature or to set the reference resistance CALCulate FUNCtion DBM CALCulate STATe OFF ON CALCulate STATe CALCulate DBM REFerence lt va ue gt MINimum MAXimum 4 4 Other System Related Operations Each system related operation performs a task that is not measurement related but plays an important role in making your measurements 4 4 1 Display 1201 has a 5x7 dot matrix dual display with three color White Red and Yellow
112. of taking readings depends on the current settings This function is only available through the front panel The auto triggering is also the default for trigger mode in 1201 How to use Auto Trigger Press ATUO TRIGGER on the front panel to toggle for enabling auto trigger mode The location of the button is shown with a red rectangle frame on Figure 4 9 AUTO TRIGGER F z a 7 k W a ae i G E a A ul rf ATR il oy os a e OW i i di A i Mi ie ti a F fi ks F ki Whe aif g f T a S af il JEn Figure 4 9 B Internal Immediate Trigger Mode Remote Interface Operation Only Definition The immediate triggering mode is only available through the remote interface operations and it is the default for the remote interface operations When the meter is in immediate trigger mode a trigger will be issued immediately as soon as the meter is in wait for event state How to use Immediate Trigger Use the following command in your PC terminal to set the internal 71 immediate trigger TRIGger SOURce IMMediate C Single Trigger Mode accessible only through the front panel Definition Single trigger mode takes one reading or specified number of readings each time when user presses SINGLE key Please refer to 4 2 3 for setting the number of samples on each trigger When the TRIG annunciator on the display is lit the meter is re
113. om a remote interface and external trigger from the rear panel Then be sure that the multimeter is ready for a trigger in the wait for trigger state The multimeter accepts a trigger only when it is in the wait for trigger state When you have finished configuring the multimeter and have selected a trigger source you need to place the multimeter in the wait for trigger state so it will take the trigger and make the measurement The INITiate READ and MEASure commands all place the multimeter to the wait for trigger state Triggering Commands INITiate READ TRIGger SOURce BUS IMMediate EXTernal SOURce TRIGger DELay lt seconds gt MINimum MAXimum DELay MINimum MAXimum TRIGger DELay AUTO OFF ON DELay AUTO SAMPle COUNt lt value gt MINimum MAXimum COUNt MINmum MAXimum TRIGger COUNt lt value gt MINimum MAXimum INFinite COUNt MINmum MAXimum SYSTEM RELATED Commands 123 Each system related operation performs a task that is not measurement related but plays an important role in making your measurements FETCh READ DISPlay OFF ON DISPlay DISPlay TEXT lt quoted string gt TEXT TEXT CLEar SYSTem BEEPer BEEPer STATe OFF ON BEEPer STATe SYSTem ERRor SYSTem VERSion DATA POINts SYSTEM IDNSTR MANUFACTURER PRODUCT x RST Questionable Data Even Register Enable Register 0 Von Overload IDN jae 1 Current
114. om input terminal HI to the positive end of the diode and connect the probe from input terminal LO to the negative end of the diode Set voltage bound via pressing CONFIG SHIFT CONT buttons When ready press ENTER Or skip this step if you wish to use the default voltage bound 4 Press SHIFT CONT buttons to select the diode testing function and observe the reading on the display 42 Note Source current flows from the INPUT Hito INPUT LO terminals Figure 3 11 3 7 Temperature Measurements The 1201 supports thermocouples and resistance temperature detector RTD types of probes For thermocouples 1201 supports 7 types E J K N R Sand T Please refer to Table 3 1 for their temperature ranges Be sure that the temperature function is configured for the right sensor type before making measurements Refer to 4 1 8 for how to make the sensor configuration In general RTDs have a better accuracy and long term stability than thermocouples The default RTD type in 1201 is PT100 and the thermocouple is type K Sensor Type Temperature Temperature Range C Range F 2 0 1000 518 1832 210 1200 140 2192 270 1300 518 2372 50 1768 122 3236 43 Sensor Type Temperature Temperature Range C Range F 2 0 1000 518 1832 210 1200 140 2192 Table 3 1 3 7 1 Thermocouple Measurements Connect the thermocouple adapter to the banana jacks on the front panel The di
115. ont Panel Operation For READINGS setting please press CONFIG and then FILTER button for selecting READINGS Press ENTER to access Use lt 4 gt A and V buttons to set the READINGS from 2 to 100 in order to get an average value Press ENTER when it s ready For MODE setting please press CONFIG and then FILTER button for selecting MODE Press ENTER to access Use lt gt to select MOVING AVG or REPEAT AVG Please ENTER to confirm Press FILTER button to enable or disable this function Remote Interface Operation Use the following commands to set your digital filter SENSe AVERage TCONtrol MOVing REPeat SENSe AVERage TCONtrol 57 SENSe AVERage COUNt lt va ue gt MINimum MAXimum SENSe AVERage COUNt MINimum MAXimum SENSe AVERage STATe OFF ON SENSe AVERage STATe 4 1 3 Resolution Setting Digits Definition Resolution is the number of digits a multimeter can measure User can select the resolution for a specific measurement The choices for the resolution setting are fast 4 5 slow 4 5 fast 5 5 slow 5 5 fast 6 5 and Slow 6 5 For a higher accuracy user can select 6 5 digit resolution For a faster measurement user can select 4 5 digit resolution The resolution setting applies to all math operations under the selected measurement function The selected value is stored in a volatile memory and the setting is only valid for the current measurement function User can select different resolution for different
116. or DCI or ACI measurement Select the auto range function by pressing AUTO button on the front 36 panel or use A and V buttons to select desired range Connect test leads to your source signal and observe the reading shown on the display If the input signal is greater than the allowed range an overflow message OVLD will be displayed Current Source Warning Maximum Input 34 DC or RMS Figure 3 4 X Note The rear terminal panel also can be used via the same procedures as the front panel See Figure 3 5 CM Current Measurement Figure 3 5 37 3 3 Resistance Measurements 2 amp 4 wire The ranges for resistance measurement are 100 Q 1KQ 10k 100k 1IMQ 10MQ and 100M with a sensitivity of 100 uQ on 100 Q range There are two modes for measuring the resistance 2 wire mode as shown in Figure 3 6 and 4 wire mode as shown in Figure 3 7 With 4 wire mode the test current is measured from the test resistance through one pair of the test leads and the test voltage across the resistance under test is measured from another set of the test leads As a result the 4 wire mode is more accurate for low resistance measurements The trade off is the longer settling time for 4 wire mode Figure 3 8 and 3 9 show the input terminal connections on the rear panel for 2 wire mode and 4 wire mode respectively How to measure resistance Selects input signal connections on front or rear panel Connect the t
117. ound vbExclamation 1201 multimeter device test viClose dfltRM Exit Sub End If Rem Open a session to each and determine if it matches stat viOpen dfIltRM desc VI_NULL VI_NULL sesn If stat lt VI_SUCCESS Then MsgBox Open device failed vbExclamation 1201 multimeter device test stat viClose fList Exit Sub End If Rem send reset command RST reset 1201 stat viWrite sesn RST 4 ret If stat lt VI_SUCCESS Then MsgBox System command error RST vbExclamation 1201 multimeter device test stat viClose fList Exit Sub End If Rem send Clear command CLS Clear 1201 status register stat viWrite sesn CLS 4 ret If stat lt VI_SUCCESS Then MsgBox System command error CLS vbExclamation 1201 multimeter device test stat viClose fList Exit Sub End If Rem send command 50 ohm reference resistance stat viWrite sesn CALC DBM REF 50 15 ret If stat lt VI_SUCCESS Then MsgBox System command error vbExclamation 1201 multimeter device test stat viClose fList Exit Sub End If Rem send command Set 1201 to 1 amp ac range stat viWrite sesn CONF VOLT AC 1 0 001 20 ret If stat lt VI_SUCCESS Then MsgBox System command error vbExclamation 1201 multimeter device test stat viClose fList Exit Sub End If Rem send command Select 200 Hz fast ac filter stat viWrite sesn DET BAND 200 12 ret If stat lt VI_SUCCESS Then MsgBo
118. own on the display according to the following equation Y MX B This is especially useful when user needs to do slope calculations on a series of measurements The values of the M and B can be changed through the configuration of this function and they are stored in a volatile memory and will be cleared after the meter has been turned off or a remote interface reset User can either use front panel or remote interface to perform this function and set these two constant How to use MX B function You can use MX B function from the front panel operation or the remote interface operation Front Panel Operation To set the values of M and B user needs to configure this math function by pressing CONFIG and SHIFT Use lt and gt to switch between M 86 and B Press ENTER on your selection Then use lt and gt to move through the digits and use and V to increase or decrease the number to a desired value Press ENTER to set the value User needs to set the values of M and B first Then Select a measurement function and press SHIFT to activate MX B function as shown as Figure 4 20 Figure 4 20 Remote Interface Operation Use the following commands to enable and configure MX B function CALCulate FUNCtion MXB CALCulate STATe OFF ON CALCulate STATe CALCulate MXB MMFactor lt va ue gt MINimum MAXimum CALCulate MXB MMFactor MINimum MAXimum CALCulate MXB MBFactor lt va ue gt MINimum MAXimum
119. p Fast 5 5 0 1 100 Slow 5 5 amp Fast 6 5 1 19 0 105 weet iw 5 ean rate oh 6 6 A Fast 4 5 0 02 Mix function 65 a OOOO O R O 442 5 13 How to program each channel with measurement function Press CONFIG SHIFT DIGITS for scanning configuration Use lt and gt to scroll through submenus Press ENTER on SET SCAN CHA submenu Use lt and gt to switch from channel 1 to channel 10 and use and V to switch among the measurement functions Leave an unused channel with a blank space Press ENTER when ten channels are all defined How to configure scan count scan interval and store measurement readings Press CONFIG SHIFT DIGITS for scanning configuration Use lt and gt buttons to scroll through submenus Press ENTER to select OPERATION submenu Use lt and gt to switch among scan count COUNT scan interval TIMER and store STORE options Then press ENTER on your selection Use lt and gt to move through the digits and Aand YV to increase or decrease the numbers to a desired value For STORE option you can select ON to instruct the meter to store the measurement results for later retrieving or select OFF Press ENTER to set the value How to open and close the channels Press CONFIG SHIFT DIGITS for scanning configuration Use lt and gt buttons to scroll through submenus Press ENTER on when you need to close a specific channel Press ENTER again on
120. play 45 Platinum RTD Note Source current flows from the INPUT HI to INPUT LO terminals Figure 3 13 46 Platinum RTD i 4 i x d a i S i a l Si DC Taat Figure 3 14 3 7 2 2 3 Wire RTD Measurements How to measure temperature with 3 Wire RTD The following Figure 3 15 shows theory diagram of 3 Wire RTD measurement Use terminals switch to select front terminals Insert a specified adapter into the front terminals Connect the low thermal patch leads to the adapter as shown in Figure 3 16 Configure sensor type as you would be with 4 wire RTD and unit using CONFIG TEMP and lt or gt When ready press ENTER button Press TEMP button Place RTD in the desired position and take the reading on the display OOA 0O 47 Platinum RTO A iE TE 2 gt ill 48 Source Sense 13 wire HI Source Figure 3 16 3 7 2 3 4 Wire RTD Measurements How to measure temperature with 4 Wire RTD The following Figure 3 17 shows theory diagram of 4 Wire RTD measurement Use terminals switch to select front terminals Insert a specified adapter into the front terminals Connect the low thermal patch leads to the adapter as shown in Figure 3 18 Configure sensor type and unit
121. r detected will be the first error retrieved Refer to Chapter 6 for the list of error messages 1 The error annunciator will be turned off when you have read the errors in the memory 2 If there is no error found when you check the error queue the multimeter shows NO ERRORS 3 If there are more than 20 errors found the last error in the error queue will be replaced with 350 means too many errors 4 The error queue is cleared when the multimeter is turned off or when a CLS command is received How to check the error queue Press MENU then use lt and gt gt to locate SYSTEM submenu Press ENTER to select it Again use lt and gt to locate ERROR option Press ENTER to select it The message about error queue will show on the display Refer to Chapter 6 for the descriptions of all the error messages The locations of the buttons are shown with red rectangle frames in Figure 4 35 105 MENU lt PREV NEXT Figure 4 35 4 4 10 Firmware Revision 1201 has three microprocessors for various internal systems You can query the multimeter to determine which revision of firmware is installed for each microprocessor How to check the firmware revision Press MENU and then use lt and gt to locate SYSTEM submenu Press ENTER to select it Again use lt and gt to locate REVISION option Press ENTER to select it The multimeter gives three num
122. r positive sign D Numeric digits E Exponent lt nl gt newline character lt cr gt carriage return character 141 C 3 The MEASure Command MEASure VOLTage DC lt range gt MIN MAX DEF lt lt resolution gt MIN MAX DEF Preset and make a dc voltage measurement with the specified range and resolution The reading is sent to the output buffer MEASure VOLTage DC RATio lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF Preset and make a dc dc ratio measurement with the specified range and resolution The reading is sent to the output buffer For ratio measurements the specified range applies to input signal yet autorange is selected for the reference signal MEASure VOLTage AC lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF Preset and make an AC voltage measurement with the specified range and resolution The reading is sent to the output buffer For AC measurement resolution is fixed at 6 1 2 digits Therefore the resolution parameter only affects the front panel display MEASure CURRent DC lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF Preset and make a dc current measurement with the specified range and resolution The reading is sent to the output buffer MEASure CURRent AC lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF Preset and make a AC current measurement with the specified range and resolution The reading is sent to the output buffer For
123. red rectangle frames X Note Press SHIFT NULL again to disable this feature The MATH anunnciator on the display indicates the state of a mathematical feature Figure 4 22 Remote Interface Operation Use the following commands from your PC terminal to make the dB measurement CALCulate FUNCtion DB CALCulate STATe OFF ON CALCulate STATe CALCulate DB REFerence lt va ue gt MINimum MAXimum B dBm Definition With dBm selected a voltage measurement is displayed as the level of power relative to 1 milliwatt dissipated through a reference resistance The reference resistance is adjustable in 1201 The calculation of dBm is defined as below Vy dB 10xtog Jamie ref X Note V is the input signal voltage Z is the reference resistance X Note Change of reference resistance will not affect the stored relative 89 reference value The Zref is adjustable with a range from 50 to 8000 Q The default value is 600 Q The user selected reference value is stored in a volatile memory and will be cleared after the multimeter has been power off This feature is available for DCV and ACV only How to set the reference resistance User can set the reference resistance either through the front panel operation or the remote interface operation Front Panel Operation Press CONFIG SHIFT MIN MAX then use lt and gt to move through the digits and A and YV to increase or decrease the numbers t
124. rrectly specified for a numeric parameter 138 Suffix not allowed A suffix was received following a numeric parameter which does not accept a suffix 128 148 Character not allowed A discrete parameter was received but a character string or a numeric parameter was expected 151 Invalid string data An invalid character string was received 158 String data not allowed A character string was received but not allowed for the command 160 168 Block data errors Block data is not acceptable 170 178 Expression errors The meter does not accept mathematical expression 211 Trigger ignored A Group Execute Trigger GET or TRG was received but the trigger was ignored 213 Trigger deadlock A trigger deadlock occurs when the trigger source is BUS and a READ Command is received 214 Init Ignored An INITiate command was received but could not be executed because a measurement was already in progress Send a device clear to halt a measurement in progress and place the meter in the idle state 221 Settings conflict This error can be generated in one of the following situations Situation 1 You sent a CONFigure or MEASure command with autorange enabled and with a fixed resolution Situation 2 You turned math on and then changed to a math operation that was not valid with the present measurement function 129 222 Data out of range A numeric parameter value is out of range
125. rror The error queue is cleared when power has been off or after a CLS clear status command has been executed The RST reset command does not clear the error queue 6 1 Error Type There is only one type over here execution errors If the errors user can t find here please contact with your seller for help 6 1 1 Execution Errors 101 Invalid character An invalid character was found in the command string 102 Syntax error Invalid syntax was found in the command string 103 Invalid separator An invalid separator was found in the command string 104 Data type error A parameter type error was found in the command string 105 GET not allowed A Group Execute Trigger GET is not allowed in the command string 108 Parameter not allowed More parameters were found than needed for the command 109 Missing parameter Not enough parameters were received for the command 112 Program mnemonic too long A command header with too many characters was received 113 Undefined header An invalid command was received 121 Invalid character in number An invalid character was found in the number specified for a parameter value 123 Numeric overflow A numeric parameter with exponent larger than 32000 was found 124 Too many digits A numeric parameter was found whose mantissa contained more than 255 digits excluding leading zeros 131 Invalid suffix A suffix was inco
126. s after the current is applied A 20ms A D measurement is performed and checked against a limit of 2V to 13V into the ADC 624 Unable to sense line frequency The supplied voltage AC2 is routed through a comparator U4 to generate a logic input signal This test checks that the logic input from U4 to panel MCU U3 is toggling If no logic input is detected the instrument will assume 50Hz line operation for all future measurements 111 5 Remote Interface Operations 1201 supports two remote interfaces the built in USB and optional GPIB TEEE 488 With GPIB you will need a GPIB interface card This chapter lists the SCPI Standard Commands for Programmable Instrument commands available to control the multimeter For the first time to use SCPI users would better to refer to Appendix B for SCPI reference 5 1 Pass Fail Output From USB Connector The USB connector on the rear panel of 1201 is a series B connector When the USB interface is disabled IEEE 488 interface is selected the internal pass and fail TTL output signals limit testing will be connected to the USB connector The pass and fail signals are low true and indicate the Math Pass Fail Limit Test result for the next reading to be output to the GPIB interface The signals are active low for approximately 2ms 100 u sec for each reading taken Figure 2 17 shows the USB connector series B f nN IE 3 4 L am 7 f P Figure 2
127. s with the handle as shown in Figure 1 5 gt Figure 1 5 16 2 1 2 To connect the power Check the power line voltage on the rear panel to see if voltage setting is correct for your area Change the setting if it is not correct or the fuse is broken Please follow the steps below 2 1 2 1 To convert the voltage A Warning In some areas the power supplied voltage is 240V or 120V in others the power supplied voltage is 220 V or 100 V Please refer to your local power supplied voltage to see if you have the right setting A Warning Before changing the setting make sure the multimeter is disconnected from the AC power An incorrect voltage setting may cause severe damage to your instrument A Warning The power cord supplied with 1201 contains a separate ground wire for use with grounded outlets When proper connections are made instrument chassis is connected to power line ground through the ground wire in the power cord Failure to use a grounded outlet may result in personal injury or death due to electric shock Suppose your condition is in AC 100V and you want to convert the voltage to the 220V Follow these steps to change the voltage setting Step 1 Verify that the meter is disconnected as shown in Figure 2 1 Figure 2 1 Step 2 Open the voltage setting selector cap as shown in Figure 2 2 You might need a screwdriver to do so Figure 2 2 Step 3 Remove the red voltage setting selector from the r
128. set the desired number by pressing and V buttons to increase or decrease the number and using lt and gt buttons to move through the digits The locations of these buttons are shown with red rectangle frames in Figure 4 11 Procedures MENU TRIG N SAMPLE lt Number gt PREV NEXT gt 4 ENTER Figure 4 11 Remote Interface Operation Use the following command to set the number of samples from your PC terminal 74 SAMPle COUNt lt value gt B Number of triggers Although the meter normally takes one trigger before returning to the idle state user can manually specify the number of triggers it accepts before the idle state However this can only be done through the remote interface The following command show how to set multiple triggers per returning idle state TRIGger COUNt lt value gt C Reading hold The reading hold feature is used to hold a stable reading on the display When a reading is stable enabling the reading hold will hold the stable reading and trigger a beeping sound Reading hold feature depends on an adjustable sensitivity band to determine if a reading is stable The multimeter considers a reading stable when three consecutive readings are within the sensitivity band Chapter 4 4 6 will explain how to adjust the sensitivity band How to use reading hold This feature is only available from the front panel operations To enable reading hold press both SHIFT and AUTO TRIG
129. splay is turned off Figure 2 19 31 2 3 3 The Rear Panel The rear panel of the 1201 is shown in Figure 2 20 This figure includes important abbreviated information that should be reviewed before using the instrument 2 345 Figure 2 20 1 Inserted Connections amp Fuse Device HI amp LO Used for all measurements except AC amp DC current and temperature LO amp l Used for making DC and AC current measurements Rear Fuse Secures your Meter against damage of strong current pulse 2 BNC Connections VM COMP Voltmeter Complete Output Terminal Outputs a low true pulse after the completion of each measurement EXT TRIG External Trigger Input Terminal Inputs a low true pulse from a remote interface 3 USB Connection Connects a remote computer for changing operation environment instead of the front panel control 4 Protective Conductor Terminal 5 Power Module Contains the AC line receptacle power line fuse and 32 line voltage setting Configured for line voltages of 100 220V or 120 240V Depend on the power utility in your area Option Slot Designed for installing an optional multi point scanner card Model 1201 opt01 Option GPIB IEEE488 Connection Connects a remote computer with an IEEE488 cable for changing operation environment instead of the front panel control Model 1201 opt04 33 3 Basic Measurement Function This chapter introduces some basic measurement
130. ss MENU button then use lt and gt buttons to locate SYSTEM submenu Press ENTER to select it and then again use lt and gt buttons to locate DISPLAY submenu Press ENTER to select it and then find ON or OFF by using lt 92 and gt buttons Press ENTER on your selection The locations of the buttons are shown with red rectangle frames in Figure 4 26 Procedures MENU SYSTEM DISPLAY ON OFF PREV NEXT ENTER Figure 4 26 Remote Interface Operation The following commands show how to control the display as well as how to send a message to the display DISPlay OFF ON turns off or turns on the display DISPlay TEXT lt quoted string gt displays the string you type in DISPlay TEXT CLEar clears the message displayed 4 4 2 Beeper 1201 multimeter beeps when some certain conditions are met or when an error occurs But there may be time you want to disable the beeper for some operations Although you can turn off the beeper the click sound you hear when a button is pressed will not be disabled The beeper state is stored in a volatile memory and the default will be restored when the meter has been turned off or after a remote interface reset By disabling the beeper you will not hear the meter beeps when anew minimum or maximum is found in Min Max operation a stable reading is detected and held 93 the test voltage is within the limits in diode testing the source
131. st out FIFO order Each error string may contain up to 80 characters STATus QUEStionable ENABle lt enable value gt Enable bits in the Questionable Data enable register The selected bits are then reported to the Status Byte STATus QUEStionable ENABle Query the Questionable Data enable register The multimeter returns a binary weighted decimal representing the bits set in the enable register STATus QUEStionable EVENt Query the Questionable Data event register The multimeter returns a decimal value which corresponds to the binary weighted sum of all bits set in the register STATus PRESet Clear all bits in the Questionable Data enable register CLS Clear the Status Byte summary register and all event registers ESE lt enable value gt Enable bits in the Standard Event enable register The selected bits are then reported to the Status Byte ESE Query the Standard Event enable register The multimeter returns a decimal value which corresponds to the binary weighted sum of all bits set in the register ESR Query the Standard event register The multimeter returns a decimal value which corresponds to the binary weighted sum of all bits set in the register 159 OPC Sets the operation complete bit bit 0 in the Standard Event register after the command is executed OPC Returns 1 to the output buffer after the command is executed PSC 0 1 Power on status clear Clear t
132. tage 0 1V 1V 10V 100V amp 750V DC current 10mA 100mA 1A amp 3A AC current 1A amp 3A 2 amp 4 wire resistance 1009 1K92 LOKQ 100K2 1M2 10M amp 100MQ Frequency From 3Hz to 300kHz Period measurement Diode measurement Continuity measurement for resistance Thermocouple temperature amp RTD measurements Some additional capabilities of 1201 include Full math functions dB dBm MX B ratio Max Min null amp limits Optional multipoint scanner card For internal scanning options include 1201 opt01 a 10 channel general purpose card USB and GPIB Optional remote control interface Through Microsoft Office Word amp Excel for remotely storing and recalling the measured values Through 1201 AP software for simulating the real operation on PC 1 2 Warranty Information 1 2 3 Warranty BERKELEY NUCLEONICS CORPORATION CORP guarantees that this product meets its published specifications at the time of shipment from the factory Under proper installation it should work as expected Warranty Period This equipment is warranted against defects in material and manufacturing for a period of one year from the date of shipment During the warranty period BERKELEY NUCLEONICS CORPORATION is responsible for necessary repairs as long as the product can be proved to be defective For warranty service or repair this product must be returned to a service facility designated by BERKELEY N
133. tage is incorrect Errors may also occur because of signals Warning Erroneous self test failures may occur if the setting of present on the input terminal front and rear during self test procedure Long test leads can act as an antenna causing pick up of ac signals How to execute Self test Users may execute a complete self test by front panel operation This test procedure provides more tests for the hardware of 1201 than the power on tests Please follow the Figure 4 38 direction and procedure below to perform the complete self test PREV NEXT ENTER F i ii aT Lh l a 7 a a in fa a ss J A A i os N o ae ea a L D Figure 4 38 Procedure MENU SYSTEM SELF TEST After self test procedure the result PASS or FAIL will be shown If the result is FAIL the ERR annunciator on the display panel will be lit and error codes will be stored You can check the error codes by the following procedure Procedure MENU SYSTEM ERROR The descriptions of self test procedures are listed below including test number purpose test setup and failure criteria 601 Front panel does not respond The main CPU U1601 attempts to establish serial communications with the front panel processor U3 108 Communication must function in both directions for this test to pass 602 RAM read write failed This test writes and reads a 55h and AAh checker board pattern to each ad
134. ture TEMPerature TEMPerature TEMPerature TEMPerature TEMPerature TEMPerature TEMPerature SENSe VOLTage DC VOLTage DC CURRent DC CURRent DC RTD TYPE RTD RZERo lt va ue gt MINimum MAXimum RTD RZERo MINimum MAXimum RTD ALPHa lt va ue gt MINimum MAXimum RTD ALPHa MINimum MAXimum RTD BETA lt va ue gt MINimum MAXimum RTD BETA MINimum MAXimum RTD DELTa lt va ue gt MINimum MAXimum RTD DELTa MINimum MAXimum SPRTD RZEROo lt va ue gt MINimum MAXimum SPRTD RZERo MINimum MAXimum SPRTD A4 lt va ue gt MINimum MAXimum SPRTD A4 MINimum MAXimum SPRTD B4 lt va ue gt MINimum MAXimum SPRTD B4 MINimum MAXimum SPRTD AX lt va ue gt MINimum MAXimum SPRTD AX MINimum MAXimum SPRTD BX lt va ue gt MINimum MAXimum SPRTD BX MINimum MAXimum SPRTD CX lt va ue gt MINimum MAXimum SPRTD CX MINimum MAXimum SPRTD DX lt va lue gt MINimum MAXimum SPRTD DX MINimum MAXimum NPLCycles 0 02 0 1 2 10 MINimum MAXimum NPLCycles MINimum MAXimum NPLCycles 0 02 0 1 2 10 MINimum MAXimum NPLCycles MINimum MAXimum RESistance NPLCycles 0 02 0 1 2 10 MINimum MAXimum RESistance NPLCycles MINimum MAXimum 119 FRESistance NPLCycles 0 02 0 1 2 10 MINimum MAXimum FRESistance NPLCycles MINimum MAXimum SENSe FREQuency APERture 0 01 0 1 1 MINimum MAXimum FREQuency APERture MINimum MAXimum PERiod APERture 0 01 0 1 1 MINimum MAXimum PERiod A
135. ultimeter can output readings directly to a printer without being addressed by a bus controller over either HP IB or RS 232 For proper operation make sure your printer is configured in the isten always mode Address 31 is not a valid address if you are operating the multimeter from the HP IB interface with a bus controller If you select the RS 232 interface and then set the HP IB address to the talk only address 31 the multimeter will send readings over the RS 232 interface when in the local mode D About Application Programs This section provides a brief description for each 1201 sample collection Visual Basic Learn how to create and use BERKELEY NUCLEONICS CORPORATION IOUtils components controls data access and more with the Visual Basic sample applications For an overview and installation details see Visual Basic Explore the Samples 164 Visual C In an MFC application you can override BERKELEY NUCLEONICS CORPORATION IOUtils interfaces in a class as well as provide additional interfaces The example in this article illustrates how to override an interface in a class while preserving the original interface implementation so that it can be delegated to by the new interface implementation Browse the Visual C samples code see Visual C DEVQUERY Sample Application Using MEASure for a Single Measurement The following example uses the MEASure command to make a single ac current measurement This is the easiest
136. using the product To avoid possible electric shock or personal injury please read and follow these guidelines carefully Follow the guidelines in this manual and DO NOT use the Meter if the case is damaged Check the Meter case and terminals and make sure all the devices are in the proper positions Do not apply excessive voltage to the Multimeter Apply voltage within the rated range only Use caution when measuring voltages above 30 V RMS 42 V peak or 60 V DC These voltages pose an electric shock hazard When using the probes always keep your fingers behind the finger guards Always connect the common test leads black before connecting the live test leads red and disconnect the live test leads red before disconnecting the common test leads black This will reduce the chance of an electric shock Disconnect circuit power and discharge all high voltage capacitors before testing resistance continuity diodes or capacitance If you need to open the Meter case or replace any parts read the instruction in this manual first You must be a qualified personnel to perform this action When replacing fuses use only the same type and same rating as specified Do not try to operate the Meter if it is damaged Disconnect the power from the equipment and consult the local service representative Return the product to BERKELEY NUCLEONICS CORPORATION service department if necessary 1 6 Symbols and Terms N sei symbol indic
137. ve the broken fuse from the selector as shown in Figure 2 9 Figure 2 9 Step 5 Replace with the new fuse as shown in Figure 2 10 Figure 2 10 Step 6 Insert the voltage setting selector back into the socket and close the cap as shown in Figure 2 11 Figure 2 11 22 Step 7 Make sure the power switch on the front panel is in Power OFF condition before plugging as shown in Figure 2 12 Figure 2 12 Power switch 7 POWER OFF Step 8 After finishing the above procedures you can plug in your power cord as shown in Figure 2 13 Figure 2 13 23 Step 9 Press on the power switch on the front panel for activating 1201 as shown in Figure 2 14 Figure 2 14 Power switch A POWER ON 2 1 3 Factory Default When Power ON Table 2 1 shows the factory default of 1201 Function Default Function DCV Autozero On Frequency and Period Source AC Voltage Output Format ASCII Ratio Off AC Input 20Hz Bandwidth Frequency 24 Table 2 1 25 AC Digits 5 5 Slow 5 5 memags DC digits 1 PLC Range Auto AC Digits 515 S Slow 5 5 Current DC Digits 1 PLC Range Auto Digits oye FEINEN Range AUTO and Period Medium Rate 100ms Digits 5 5 Diode Test Range 1mA Rate 0 1 PLC Slow 5 5 Resistance Digits 1 PLC 2 wire Range Auto Slow 6 5 Digits Temperature 10
138. x System command error vbExclamation 1201 multimeter device test stat viClose fList Exit Sub End If Rem send command 1201 will accept 5 triggers stat viWrite sesn SAMP COUN 5 11 ret If stat lt VI_SUCCESS Then 169 MsgBox System command error vbExclamation device test stat viClose fList Exit Sub End If Rem send command Trigger source is IMMediate stat viWrite sesn TRIG SOUR IMM 13 ret If stat lt VI_SUCCESS Then MsgBox System command error vbExclamation device test stat viClose fList Exit Sub End If Rem send command Select dBm function stat viWrite sesn CALC FUNC DBM 13 ret If stat lt VI_SUCCESS Then MsgBox System command error vbExclamation device test stat viClose fList Exit Sub End If Rem send command Enable math stat viWrite sesn CALC STAT ON 12 ret If stat lt VI_SUCCESS Then MsgBox System command error vbExclamation device test stat viClose fList Exit Sub End If Rem send command Take readings stat viWrite sesn READ amp vbLf 6 ret If stat lt VI_SUCCESS Then MsgBox System command error vbExclamation device test stat viClose fList Exit Sub End If Sleep 3000 wait for math processing Rem fetch the measure data stat viRead sesn readin 128 ret If stat lt VI_SUCCESS Then 1201 1201 1201 1201 1201 multimeter multimeter multimeter multimeter mult
139. xample program n printf We check the 1201 multimeter on USB port and n printf identify the first connected 1201 device n n Open Device Resource Manager status PviOpenDefaultRM_usb amp m_defaultRM_usbtmc if status lt OL PviClose_usb m_defaultRM_usbtmc hUSBTMCLIB NULL m_defaultRM_usbtmc 0 MessageBox NULL USBTMC resource not found 1201 multimeter device test MB_OK return else Find the USBTMC device USB 0 9 0x1698 0x083F INSTR Hex status PviFindRsrc_usb m_defaultRM_usbtmc USB 0 9 0x164E 0xOFA3 INSTR amp m_findList_usbtmc amp m_nCount 174 instrDescriptor if status lt OL Find the USBTMC device USB 0 9 0x164E 0xOFA3 INSTR Dec status PviFindRsrc_usb m_defaultRM_usbtmc USB 0 9 5710 4003 INSTR amp m_findList_usbtmc amp m_nCount instrDescriptor if status lt OL PviClose_usb m_defaultRM_usbtmc hUSBTMCLIB NULL m_defaultRM_usbtmc 0 else PviOpen_usb m_defaultRM_usbtmc instrDescriptor 0 O amp m_instr_usbtmc status PviSetAttribute_usb m_instr_usbtmc VI_ATTR_TMO_VALUE m_Timeout else PviOpen_usb m_defaultRM_usbtmc instrDescriptor 0 0 amp m_instr_usbtmc status PviSetAttribute_usb m_instr_usbtmc VI_ATTR_TMO_VALUE m_Timeout if IHUSBTMCLIB printf 1201 device connect failed n return 175 Write command IDN and r

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