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1. Figure 4 18 How to make a limit testing The locations of the buttons are shown with red rectangle frames in the Figure 4 19 Select a measurement function for purpose except continuity and diode Enable the limit operation by pressing SHIFT RATIO buttons e After enabling the limit function you can set the limit value as mentioned above Observe the displayed reading Note Press SHIFT RATIO again to disable this feature The MATH anunnciator on the display indicates the state of a mathematical feature Figure 4 19 Remote Interface Operation Use the following commands to enable the limits function or to set the limits 86 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 shown on the display according to the following equation Y MX B This is especially useful when you need 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
2. gt Figure 4 31 4 4 6 Stepping Step Stepping is scanning with a specified time delay between taking input signal through the defined channels Note Setting range of scanner card is only limited DCI ACI Frequency Period and Resistance functions How to program each channel with measurement function Press CONFIG SHIFT FILTER for scanning configuration Use 1 and to scroll through submenus Press ENTER on SET SCAN CHA submenu Use and 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 104 Press CONFIG SHIFT FILTER for scanning configuration Use i and gt buttons to scroll through submenus Press ENTER to select OPERATION submenu Use lt and to switch among scan count COUNT scan interval TIMER and store STORE options Then press ENTER on your selection Use lt and b to move through the digits and Aand 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 FILTER for scanning co
3. Figure 4 22 91 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 value 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 M3500A The calculation of dBm is defined as below dB ref X Note is the input signal voltage Z is the reference resistance ref Note Change of reference resistance will not affect the stored relative reference value e The Zref is adjustable with a range from 500 to 8000 Q The default value is 600 Q e The selected reference value by you is stored in volatile memory and will be cleared after the multimeter has been power off e This feature is available for DCV and ACV only How to set the reference resistance You 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 4 and to move through the digits and and 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 23 92
4. 47 Source Sense 23 wire HI In Short Condition 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 D Use terminals switch to select front terminals 2 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 transducer 4W and unit using CONFIG TEMP and 4 or When ready press ENTER button For more information refer to the section 4 1 8 Press TEMP button Place RTD in the desired position and take the reading the display 48 PICOTEST M3500A Platinum RTD Figure 3 17 Platinum RTD 100600606 E Input Sense Q4 wire HI Sense Q4 wire LO L Input LO 49 Sense 24 wire Platinum RTD Figure 3 18 50 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 func
5. SENSe TEMPerature SPRTD RZERo SENSe TEMPerature SPRTD A4 lt value gt MINimum MAXimum SENSe TEMPerature SPRTD B4 value SENSe TEMPerature SPRTD AX lt value gt MINimum MAXimum SENSe TEMPerature SPRTD BX 1 value SENSe TEMPerature SPRTD CX value MINimum MAXimum SENSe TEMPerature SPRTD DX lt value gt MINimum MAXimum SENSe TEMPerature TRANsducer FRTD SENSe TEMPerature TRANsducer RTD Thermocouple Definition If you are using the thermocouple function the selections on the M3500A are type E J K N R S and T On the other hand other selection SIMULATED simulates the reference junction To use the the 67 thermocouple function you have to adjust something First of all via a thermocouple adaptor you need to measure a known and accurate reference temperature T1 as a criterion Then the display of the M3500A will show a reference value T2 At the moment a remainder T3 from T1 T2 will be calculated After that you just adjust the default simulated value 23 0 C to 23 0 C Under the circumstance the thermocouple function will be activated completely For Example If the criterion value is T1 30 0 C the reference value showing on the M3500A is T2 24 0 C You will get a remainder T3 T1 T2 6 090 Then you just configure the default
6. 4 Figure 2 14 Power switch POWER 2 1 3 Factory Default When Power ON Table 2 1 shows the factory default of M3500A Table 2 1 Function Default Function DCV Autozero On Frequency and Period Source AC Voltage Output Format ASCII Ratio Off AC Input 20Hz Bandwidth Frequency 24 AC Digits 5 5 Slow 5 5 Voltage DC digits 1 PLC Range Auto AC Digits 5 5 Slow 5 5 Current DC Digits 1 PLC Range Auto Digits 5 5 Erequeney Range AUTO and Period Medium Rate 100ms Digits 5 5 Diode Test Range 1 Rate 0 1 PLC Slow 5 5 Resistance Digits 1 PLC 2 wire Range Auto Slow 6 5 Digits Temperature 10 PLC Thermocouple Universal Type Source Immediate Triggers Delay Auto Input Resistance 10MQ 25 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 60 RDGS Sec at 6 5 Digit in 60 Hz Multi Points Scanner Card Up to 20 Channels Optional RTD probe Adapter optional convenient to use Built in USB and GPIB RS 232 Optional Interfaces Easy amp Free PC applications 2 3 M3500A Function Introduction To bec
7. MIN MAX Figure 4 23 L 5 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 e After enabling the dBm operation you can select the reference resistance as mentioned above The default for the reference resistance is 600 The locations of the buttons are shown with red rectangle frames in Figure 4 24 xX Note Press SHIFT MIN MAX again to disable this feature The MATH anunnciator on the display indicates the state of a mathematical feature Figure 4 24 93 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 value 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 M3500A has a 5x7 dot matrix dual display with three color White Red and Yellow annunciators for a better view A maximum 13 characters are allowed for upper row dot matrix display and a maximum 16 characters are allowed for lower row dot matri
8. How to save the settings Press MENU and then use 4 and to locate SYSTEM submenu Press ENTER to select it Again use 4 and to locate INIT MODE submenu and then press ENTER to select it Use 4 and 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 8888888888888 MENU NEXT gt ENTER Figure 4 33 4 4 8 Language M3500A supports two languages DEFAULT M3500A and COMPATIBLE How to set up the language Press MENU and then use 1 and to locate SYSTEM submenu Press ENTER to select it Again use lt and to locate LANGUAGE submenu Press ENTER to select it Use lt and b to switch to DEFAULT M3500A or COMPATIBLE Press ENTER on your selection The locations of the buttons are shown with red rectangle frames in Figure 4 34 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 107 errors found the error annunciator will be lit to inform you The multimeter stores errors using the first in firs
9. Warning Maximum Input 3A DC or RMS Figure 3 4 Note The rear terminal panel also 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 100 Q 1KQ 10kO 100kQ 1MQ 10 0 and 100MQ with a sensitivity of 100 uQ on 100 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 D Selects input signal connections on front or rear panel Connect the test 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 but
10. PICOTEST 5 6 5 Digit Digital Multimeter PICOTEST es mu Mimeter ei i m User s Manual Version 1 06 M3500A DMM Bill R H WI IRE HUL lt lt mr EXTENSION CARD OPTION User s Manual Table of Contents 1 GENERAL INFORMATIDONN 6 1l FEATURE OVERVIEW 5 tee oie ibtd cabe 6 1 2 WARRANTY INFORMATION 7 1 3 PRECAUTION OF OPERATIDON EDU TER HE VE eee 8 1 4 UPKEEP OF M3500A soon ot due duni eta Ud ata O 9 1 5 SAFETY INFORMATION a Sas eene decies 9 1 6 SYMBOLS AND TERMS 10 54 INSPECTION fuses tonto CUN o 11 1 9 ACCESSORIES u er ee 12 1 9 5 5 n tete etin iai eg 13 2 OVERVIEW uu enini ades Ue Praed re ross Deuda 14 2 1 SETTING UP YOUR M3500A DIGITAL 14 2 1 1 To adjust the handle sss 14 2 1 2 To connect the 17 2 1 2 1 To convert the voltage 17 2 1 2 2 TO CHANGE the f se 20 2 1 3 Factory Default When 24 242 FEATURES eere e
11. PICOTEST M3500A Rear Panel s ali VM Voltage Measurement Figure 3 3 3 2 Current Measurements DC amp AC The ranges for DC current measurements in M3500A are 10mA 100mA 1A and 3A For AC current measurements the range is 1A with a sensitivity of 1 to AC Coupled TRMS with a sensitivity of 10 4A Figure 3 4 and 3 5 show you how to measure DC AC currents in M3500A 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 D Selects input signal connections on front or rear panel 2 Connect the test leads to the terminals as shown in Figure 3 4 3 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 for DCI or ACI measurement 36 Select the auto range function by pressing AUTO button on the front panel or use A and V buttons to select desired range 6 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 PICOTEST M3500A Gdricoresr Current Source
12. Decimal Bit Definition Value Range overload on dc ac volts frequency period diode or ratio O voltage Overload 1 function 1 Current Overload 2 Range overload on dc ac current function 2 Not Used 4 Set to 0 3 Not Used 8 Set to 0 4 Not Used 16 Set to 0 5 Not Used 32 Set to 0 6 Not Used 64 Set to 0 7 Not Used 128 Set to 0 8 Not Used 256 Set to 0 9 Ohms Overload 512 Range overload on 2 4 wired ohm function 10 Not Used 1024 Set to 0 11 Limit Failed at LO 2048 Reading is less than lower limit under limit test 12 Limit Failed at HI 4096 Reading is excess upper limit under limit test 13 Not Used 8192 Set to0 14 Not Used 16384 Set 0 15 Not Used 32768 Set to 0 169 The following conditions will clear the questionable data event register You execute a CLS command You query the event register by using STATus QUEStionable EVENt The following conditions will clear the questionable data enable register e You turn on the power without using PSC command You execute the STATus PRESet command You execute the STATus QUEStionable ENABle 0 command C 10 Status Reporting Commands 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 STATus QUEStionable ENABle enable value Enable bits in the Questionable Data enable regist
13. NULL VI NULL sesn If stat VI SUCCESS Then MsgBox Open device failed vbExclamation M3500 multimeter device test stat viClose fList Exit Sub End If Rem send reset command RST reset M3500 stat viWrite sesn RST 4 ret If stat VI SUCCESS Then MsgBox System command error RST vbExclamation M3500 multimeter device test stat viClose fList Exit Sub End If Rem send Clear command CLS Clear M3500 status register stat viWrite sesn CLS 4 ret If stat VI SUCCESS Then MsgBox System command error CLS vbExclamation M3500 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 VI SUCCESS Then MsgBox System command vbExclamation M3500 multimeter device test stat viClose fList 181 Exit Sub End If Rem send command Set kM3500 to 1 amp ac range stat viWrite sesn CONF VOLT AC 1 0 001 20 ret If stat VI SUCCESS Then MsgBox System command vbExclamation 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 VI SUCCESS Then MsgBox System command vbExclamation multimeter device test stat viClose fList Exit Sub End If Rem send command kM3500 will accept 5 triggers
14. MIN MAX DEF CURRent DC lt lt gt MIN MAX DEF3 4 resolution MIN MAX DEF CURRent AC lt range resolution MIN MAX DEF RESistance range resolution MIN MAX DEF FRESistance lt range gt MIN MAX DEF lt resolution gt MIN MAX DEF FREQuency lt resolution MIN MAX DEF PERiod lt gt lt resolution CONTinuity DIODe TCOuple TEMPerature CONFigure The 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 120 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 Aft
15. 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 55 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 Front Panel Operation For READINGS setting please press CONFIG and then FILTER button for selecting READINGS Press ENTER to access Use 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 1 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 SENSe AVERage COUNt lt va ue gt MINimum MAXimum SENSe AVERage COUNt MINimum MAXimum SENSe AVERage STATe OFF ON SENSe AVERage S
16. SPE Device Clear 174 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 configuration states are left unchanged when a device clear message is received Device clear performs the following actions measurements in progress are aborted The multimeter returns to the trigger idle state The multimeter s input and output buffers are cleared The 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 multimeter 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 A
17. TCOuple SIMulated lt va ue gt MINimum MAXimum TCOuple SIMulated SENSe TEMPerature RTD TYPE PT100 D100 F100 PT385 PT3916 USER SPRTD NTCT TEMPerature RTD TYPE TEMPerature RTD RZERo lt va ue gt MINimum MAXimum TEMPerature RTD RZERo MINimum MAXimum TEMPerature RTD ALPHa lt va ue gt MINimum MAXimum TEMPerature RTD ALPHa MINimum MAXimum TEMPerature RTD BETA lt va ue gt MINimum MAXimum TEMPerature RTD BETA MINimum MAXimum 123 TEMPerature RTD DELTa lt value MINimum MAXimum TEMPerature RTD DELTa MINimum MAXimum TEMPerature SPRTD RZERo lt value MINimum MAXimum TEMPerature SPRTD RZERo MINimum MAXimum TEMPerature SPRTD A4 value MINimum MAXimum TEMPerature SPRTD A4 MINimum MAXimum TEMPerature SPRTD B4 value gt TEMPerature SPRTD B4 MINimum MAXimum TEMPerature SPRTD AX lt va ue gt MINimum MAXimum TEMPerature SPRTD AX MINimum MAXimum TEMPerature SPRTD BX lt va ue gt MINimum MAXimum TEMPerature SPRTD BX MINimum MAXimum TEMPerature SPRTD CX lt va ue gt MINimum MAXimum TEMPerature SPRTD CX MINimum MAXimum TEMPerature SPRTD DX value MINimum MAXimum TEMPerature SPRTD DX MINimum MAXimum SENSe VOLTage DC NPLCycles 10 02 0 111110 VOLTage DC NPLCycles MINimum MAXimum CURRent DC NPLCycles 0 02 0 1 1 10 CURRent DC NPLCycles MINimum MAXi
18. 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 CONFIG 96 Qu Y me QUARO mum Do v OE EE ES gt N S 2 Figure 4 15 Remote Interface Operation Use the following commands to enable and configure Percent function CALCulate FUNCtion PERCent 81 CALCulate STATe OFF ON CALCulate STATe CALCulate PERCent TARGet lt value 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 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 First
19. BEEPer STATe OFF ON BEEPer STATe SYSTem ERRor SYSTem VERSion DATA POINts SYSTEM IDNSTR MANUFACTURER PRODUCT RST IDN LO L1 STATUS REPORTING Commands SYSTem ERRor STATus QUEStionable ENABle enable value 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 129 Other Interface Commands SYSTem LOCal SYSTem REMote IEEE 488 2 COMMON Commands CLS ESE enable value ESE ESR IDN OPC OPC PSC 0 1 PSC RST SRE enable value SRE STB TRG 130 Error Messages Errors are retrieved in first in first out FIFO order The first error returned is the first error that was stored When you read all errors from the queue the ERROR annunciator turns off M3500A 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 error 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 you can t find here pleas
20. Copper Nickel Plated Insulation Polypropylene Resin Flasme Retardant Grade 2038 Others If any part of the Test Lead Set is damaged please do not use and replace with a new set Warning If you use the Test Lead Set which is not qualified by Picotest Corp 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 Accessories The following accessories are available from PICOTEST for use with the Model M3500A Please refer to the following Table 1 1 Table 1 1 Part Name Part Number 10 Channel Multi point Scanner Card 3500 01 Thermocouple adapter M3500 opt02 Adapters Banana to BNC Adapter M3500 opt03 GPIB Card M3500 opt04 RTD Probe Adapter M3500 opt05 RS232 Adapter M3500 opt06 Kelvin Probe M3500 opt07 4 Wire Test Leads M3500 opt08 20 Channel Multi point Scanner Card M3500 opt09 Shorting Plug M3500 opt10 K Type Thermocouple Lead M3500 opt11 10 Channel TC Scanner Card M3500 opt12 12 1 9 M3500A 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 6 88 6 370 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 t
21. 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 b or Vand A buttons to move from the first reading to the last reading the meter has 98 stored The locations of the buttons are shown with red rectangle frames in Figure 4 29 Figure 4 29 Remote Interface Operation You can use the following commands from your PC terminals to store 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 You have an opt
22. VOLTage RANGe MINimum MAXimum FREQuency VOLTage RANGe AUTO OFF ON FREQuency VOLTage RANGe AUTO PERiod VOLTage RANGe range MINimum MAXimum PERiod VOLTage RANGe MINimum MAXimum 172 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 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 173 C 12 IEEE 488 Compliance Information IEEE 488 2 Common Commands CLS ESE enable value ESE ESR IDN OPC OPC PSC 0 1 PSC RST SRE enable value 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
23. a volatile memory and will be cleared after the meter has been turned off or a remote interface reset You 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 We provide two application examples for your reference The first one is that if you have to use scanner card to obtain the current value For more specification information refer to the scanner card user s guide Second if the input current source you want to measure exceeds the current specification 3A of the M3500A Then the DCV ACV MX B functions would be helpful The current value is calculated through the equation as follows I V R Where I Current being determined 8 V Voltage measured by the DMM R 2 Shunt resistance value As to the MX B setting M stands for 1 R X stands for voltage measured by the DMM and B stands for Offset 0 Application1 via the scanner card and the PT TOOL software for the multipoint measurement but it has some limitations when using it 1 Switch the terminal to the rear control 2 Build in the necessary current shunt on the R1 R2 location available measurement for CH1 CH6 only Or externally connect current shunts in parallel connection to the required Channel s among CH10 and current source s The section 4 4 5 has the
24. bandwidth using lt and 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 54 e o aul 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 M3500A uses an averaging digital filter to yield a reading for display from a specified number of measurement readings in the past The past measurement readings are stored in a stack of memory The number may be in the range of 2 to 100 You 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 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 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
25. beeper is disabled the meter still emits a tone when an error occurs any button on the front panel is pressed e 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 You 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 96 button then use 1 and buttons to find SYSTEM menu Press ENTER to choose it and then again use 1 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 ON OFF MENU 22 lt PREV NEXT gt SS Lee ENTER Figure 4 27 Remote Interface Operation 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 M3500A 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 readings will be cleared when the multimeter is
26. diagram explanation of the scanner card 3 Insert the scanner card into the DMM carefully 4 Connect the output A s leads to the rear terminal INPUT HI and LO 5 Execute the PT TOOL 6 Choose DCI function to activate the MX B function You need to input the value and the Offset I value if you know 7 Press YES to start the measurement XxX Note We can t accept the input source exceeding 125V DCV 110V or the components on the scanner card might be burned out It s better to use the front terminal to test sources first Application 2 via the front panel operation for the single current measurement Case Mr Obama wants to measure a source 10A through a 0 10 current shunt and a M3500A DMM However the DMM s tolerance just can stand the maximum input current 3A What should he do Please obey the following procedures and illustrations as a big current measurement solution 86 1 Switch the terminal to the front control 2 Externally connect a current shunt 70 10 in parallel connection to the INPUT HI amp LO and a current source 10A 3 Press CONFIG gt SHIFT to set the MX B You need to input the current shunt value M 1 0 1 100 and the Offset B ex 0 value 4 Press ENTER to confirm the settings 5 Press DCV function 6 Activate the MX B math function by pressing SHIFT buttons 7 The DMM s display will show a value 9 969XXXE 00 This measurement also can be us
27. enable synchronization e When bit 5 is set in the status byte summary register please use a serial poll to check Then you could set the DMM for an SRQ interrupt by using SRE 32 Usage of the Messages Available Bit MAV You can use the status byte message available bit 4 to decide when data is available to read in the bus controller When the first reading trigger occurs by using the command TRIGger SOURce IMMediate the DMM will automatically enable the bit 4 The DMM will clear bit 4 only after entire messages have been read from the output buffer The bit can indicate only when the first reading is generated by the READ command So this will be helpful for you asa trigger event such as BUS or EXTernal will occur In addition the MAV bit is set only after all specified measurements have completed by using the INITiate and FETCH commands That means in detail the INITIate command is used to store readings in the DMM s internal memory And the FETCH command is used to transfer readings to the DMM s output buffer Signal by Using OPC When Data is in the Output Buffer Normally to use the operation complete bit 0 in the standard event register will signal as a command sequence is completed The bit is set in the register after executing an OPC command And if you send an OPC after a command loading a message in the DMM s output buffer the operation complete bit is allowed to be used to determine as the message is avail
28. 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 keywords A colon separates a command keyword from a lower level keyword 141 Command Format Used in This Manual The format used to show commands in this manual is shown below VOLTage DC RANGe lt range 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 vertic
29. 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 e 521 Input buffer overflow 522 Output buffer overflow 134 531 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 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 recei
30. multimeter is shipped from the factory xX Note The remote interface can be set through the front panel operations only How to select a remote interface Press MENU and then use 4 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 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 You can select either the front input terminals or the rear input terminals for your 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 Default The default situation is the front terminals 69 How to switch the terminals To switch between the front and the rear input terminals press 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 Figure 4 7 4 2 Trigger Operations In this section we will discuss the triggering system in M3500A M3500A provides a variety of trigger operations You can select a trigger mode a trigger source and different trigger settings for a specific measurement The use
31. of all you select the measurement function you 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 you can press CONFIG button and then MIN MAX button Use lt and 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 82 MIN MAX CONFIG i pd Pes I lt PREV NEXT gt Figure 4 16 Remote Interface Operation The following commands show you how to use the Min Max operation from your PC terminal CALCulate FUNCtion AVERage CALCulate STATe OFF ON CALCulate STATe 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 you can specify or alter a null value The null feature is available for all functions except continuity diode When you select the null feature for a measurement it is visi
32. simulated value from 23 0 C to 29 0 C on the M3500A Note Picotest also provides another solution 10 Channel TC Scanner 3500 12 to measure thermocouple For more information please refer to its user s guide 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 1 Configure the thermocouple type and unit Pressing CONFIG SHIFT TEMP TCOUPL and then using PREV and NEXT to select the type and unit 2 Measure a known and accurate reference temperature T1 The result showing on the M3500A is T2 3 Adjust the simulated value 23 0 C to 23 0 C T3 4 Configure the Simulated value by pressing CONFIG SHIFT TEMP TCOUPL NEXT SIMULATED ENTER and by buttons PREV NEXT and Y assistance to adjust the value Remote Interface Operation Use the following commands to set up the thermocouple configuration SENSe UNIT Cel Far K 68 SENSe UNIT SENSe TCOuple TYPE E J K N R S T SENSe TCOuple SIMulated value 4 1 9 Remote Interface Selection The multimeter supports both GPIB RS 232 and USB interfaces but only one interface can be activated at a 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 22 when the
33. stat viWrite sesn SAMP COUN 5 11 ret If stat VI SUCCESS Then MsgBox System command vbExclamation multimeter device test stat viClose fList Exit Sub End If Rem send command Trigger source is IMMediate stat viWrite sesn TRIG SOUR 13 ret If stat VI SUCCESS Then MsgBox System command vbExclamation multimeter 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 vbExclamation multimeter 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 vbExclamation multimeter device test stat viClose fList Exit Sub End If Rem send command Take readings stat viWrite sesn READ amp vbLf 6 ret If stat VI SUCCESS Then MsgBox System command vbExclamation multimeter device test stat viClose fList Exit Sub End If 182 M3500 M3500 M3500 M3500 M3500 M3500 M3500 Sleep 3000 wait for math processing Rem fetch the measure data stat viRead sesn readin 128 ret If stat VI SUCCESS Then MsgBox Read in data error vbExclamation M3500 multimeter device test stat viClose fList Exit Sub End If Rem se
34. status PviOpenDefaultRM_usb amp m_defaultRM_usbtmc if status lt OL 1 186 PviClose usb m defaultRM usbtmc hUSBTMCLIB NULL m defaultRM usbtmc 0 MessageBox NULL USBTMC resource not found M3500 multimeter device test MB OK return else Find the USBTMC device USB 0 9 0x05E6 0xM3500 INSTR Hex status PviFindRsrc usb m defaultRM usbtmc USB 0 9 0x05E6 0xM3500 INSTR amp m findList usbtmc amp m nCount instrDescriptor if status OL 1 Find the USBTMC device USB 0 9 0x05E6 0xM3500 INSTR status PviFindRsrc usb defaultRM usbtmc USB 0 9 1510 8448 INSTR amp m findList usbtmc amp m instrDescriptor if status OL 1 5 usb m defaultRM usbtmc hUSBTMCLIB NULL m defaultRM usbtmc 0 else PviOpen_usb m_defaultRM_usbtmc instrDescriptor 0 0 amp m_instr_usbtmc status PviSetAttribute usb m instr usbtmc VI ATTR VALUE m Timeout y else x 187 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 IRUSBTMCLIB printf M3500 device connect failed n return Write command IDN and read the M3500 identification string len 64 pStrout new char len ZeroMemory pStrout len strcpy pStrout idn status P
35. stored This may be 158 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 wir 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 read 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 Set a trigger delay time in seconds The delay is the time between the trigger signal and each sample that follows Spe
36. the warranty period PICOTEST 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 PICOTEST 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 maintenance unauthorized modification improper operation ignorance of environmental specifications or improper software or interfacing 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 PICOTEST shall not be liable for any direct indirect special incidental or consequential damages Limitation of warranty 2 3 4 Our warranties do not cover any damage resulting from unauthorized modification or misuse Unless mentioned elsewhere in this document our warranty does not apply to fuses probes and problems arising from normal wear or your abnormal operations Our warranties do not apply on any direct incidental special or consequential damages The above warranties are exclusive and no other warranty is expressed or implied PICOTEST disclaims any implied warranties of MERCHANTABILITY SATISFACTORY QUALITY and FITNESS for any part
37. through the digits The locations of these buttons are shown with red rectangle frames in Figure 4 11 Procedures MENU TRIG SAMPLE Number MENU 220 w JN PREV NEXT y N lt c ENTER E d Figure 4 11 Remote Interface Operation Use the following command to set the number of samples from your PC terminal SAMPIe COUNt value B Number of triggers Although the meter normally takes one trigger before returning to the idle state you can manually specify the number of triggers it accepts 75 before the idle state However this can only be done through the remote interface The following command shows how to set multiple triggers per returning idle state TRIGger COUNt value 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
38. transducer in M3500A is PT100 and 4W RTD in order How to set up RTD 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 4 and to locate SENSOR submenu Press ENTER to go to the submenu Use lt and to locate your sensor type Press ENTER to select your desired sensor type So are the Units and Transducer settings 66 Choosing USER takes you to a menu where you can specify factors used the calculation equation to obtain the temperature Use lt and b to move through the digits and 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 1 and to move through the digits and 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 SENSeTEMPerature RTD TYPE PT100 D100 F100 PT385 PT3916 USER SPRTD NTCT SENSe UNIT Cel Far K SENSe UNIT SENSe TEMPerature RTD RZERo value SENSe TEMPerature RTD ALPHa lt value SENSe TEMPerature RTD BETA lt value SENSe TEMPerature RTD DELTa value
39. 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 Warning Erroneous self test failures may occur if the setting of power line voltage is incorrect Errors may also occur because of signals 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 You may execute a complete self test by front panel operation This test procedure provides more tests for the hardware of M3500A than the power on tests Please follow the Figure 4 38 direction and procedure below to perform the complete self test 110 MENU 2 lt PREV NEXT gt ENTER zs iv 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 num
40. with the specified range and resolution This command does not initiate the measurement CONFigure FRESistance range MIN MAX DEF 1 resolution MIN MAX DEF Preset and configure the multimeter for 4 wire O measurements with the specified range and resolution This command does not initiate the measurement CONFigure FREQuency 1 range resolution 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 measurements return 0 CONFigure PERiod range MIN MAX DEF 4 resolution 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 33 146 seconds and 3 3 usec With no input signal applied period measurements return CONFigure CONTinuity Preset and configure for a continuity measurement This command does not initiate the measurement The range and resolution are fixed at 1kO and 572 digits respectively CONFigure DIODe Preset and configure for a diode measurement This command does not initiate the measurement The range and resolutio
41. 0 0 020 DCI 100 0000mA 100 nA 5 10 0 050 0 005 DC 1 000000A uA 0 10 0 100 0 010 Current 3 00000A 10 uA 0 10 0 120 0 020 1 Year Function Range Resolution Test Current 23 5 C 100 0000 Q 100 uQ 1 0 010 0 004 1 000000 1 1 0 010 0 001 10 00000 10 100 0 010 0 001 100 0000 100 10 uA 0 010 0 001 Resistance 1 000000 MQ 1Q 5 uA 0 010 0 001 10 00000 MQ 10 9 500 nA 0 040 0 001 1000 500 10 100 0000 0 800 0 010 MQ Diode Test 1 0000V 10 uV 1mA 0 010 0 020 Continuity 1000 00 10 0 010 0 030 4 To use 2 4 Wire Measurement the Null math function must be enabled b Max Lead Resistance 10 of range per lead for 1009 and 1 ranges 1 per lead for all other ranges c Input protection 1000 V at all ranges 137 Frequency and Period Characteristics Accuracy 96 of reading Function Range Frequency Hz t Year 239 50 3 5 0 10 100 Frequency 5 10 0 05 amp to Period 750V pres 0 03 40 300K 0 01 AC Characteristics Accuracy 96 of reading of range 1 Year Function Range Resolution FFequeney Hz 23 C 5 C ACV AC 3 5 1 00 0 04 TRMS 100 0000 0 1 uV 5 10 Voltage 0 35 0 04 10 20K 0 06 0 04 5 The Specifications are under the conditions 6 7 2 digits and 2 hour warm up e Measurement over 20 a
42. 4 1 1 Set ADC Auto tenete teens 51 ADD Filt r de ter ttd hte tete de 53 4 1 2 4 ACIE setenta e t RE 54 4 1 2 2 Digital FIlt r ii EE odiis 55 4 1 3 Resolution Setting Digits sss 57 4 1 4 DC Input Resistance sap ea Re edi 59 4 1 5 Threshold Resistance 60 4 1 6 Range Manual amp Auto 61 4 1 7 Rate Integration Time 63 4 1 8 Sensor Selection for Temperature Measurements 65 4 1 9 Remote Interface Selection sss 69 4 1 10 Input Terminal Switch 69 4 2 TRIGGER OPERATIONS siiin o aei tei in 70 4 221 Lrigger enata be 71 4 2 2 Trigger 5 n nu 72 4 23 Trigger Setting sss RR RR AUG RR RES 74 4 3 MATH OPERATIONS ete d adea au RR a ae h 79 4 3 1 x C ak aaa uka Ds 79 4 3 2 Do Percent stein 80 4 3 3 MID Max scis tA Re ree te BOR IS 82 ie deus 83 2 3 5 LIMES esti cei ens 85 4 3 6 MX KB 87 4137 i tut ee eat e PUOI 90 4 4 OTHER SYSTEM RELATED 65 4001 242 02 0 0 eene 94 4 4 1 DISDIAy i eee d e e 94 4 4 2 ied tetti ditte bt den 96 4 4 3
43. 8 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 5 Select the auto range function by pressing AUTO button on the front panel or use A and V buttons to select the desired range 6 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 Note The rear terminal panel also can be used via the same procedures as the front panel Please refer to Figure 3 3 40 3 5 Continuity Measurements M3500A 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 100 but you can set the threshold resistance to anything between 1 1 The resistance value set by you 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 A Warning The maximum input 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 Set REConnect the input signal as the following figure 3 Set thresho
44. B 20x log o Input signal dBm relative value dBm NOTE The V is the input signal and the 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 You can either manually select a number for the relative reference or let the multimeter take the first reading dB Front Panel Operation Press CONFIG SHIFT NULL buttons and then use 4 and to move through the digits and and buttons to increase or decrease the numbers to your desired value Press ENTER to set the value The 90 locations of the buttons are shown with red rectangle frames in Figure 4 21 RETE 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 e After enabling the dB operation you can set or alter the dB relative value as mentioned above Observe the displayed reading Figure 4 22 shows the locations of these buttons with red rectangle frames Note Press SHIFT NULL again to disable this feature The MATH anunnciator on the display indicates the state of a mathematical feature scr Jleyooooleo Q DO
45. Down range at lt 10 of range Up range at gt 120 of range SENSe function RANGe AUTO OFF ON Disable or enable autorange for the selected function SENSe function RANGe AUTO Query the autorange setting Return 1 ON or 0 OFF SENSe function RESolution resolution 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 function 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 SENSe TCOuple TYPE E J K N R S T Select thermocouple sensor type SENSe TCOuple TYPE 150 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 va ue gt MINimum MAXimum Set the default temperature of the simulated reference junction SENSe TCOuple
46. GPIB IEEE 488 and RS 232 With GPIB RS 232 you will need a GPIB RS 232 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 you d better to refer to Appendix B for SCPI reference x Note The application software designed by Picotest Corp such as PT TOOL and PT LINK so far doesn t support communication through the RS 232 interface You can use Windows Software Hyper Terminal or others for the application purpose For more information about the RS 232 settings and configuration you should read further How to set the DMM through the RS 232 If you want to apply this interface you d better know the configuration including setting the front panel s baud rate parity and number of data bit Configure the RS 232 interface pressing MENU gt INTERFACE gt RS 232 on the M3500A and using the parameters shown below Baud Rate 300 600 1200 2400 4800 9600 Default 19200 38400 57600 115200 baud e Parity amp Data Bits None 8 data bits Default Even 7 data bits or Odd 7 data bits e Number of Start Bits 1 bit fixed e Number of Stop Bits 2 bits fixed Note The settings on the DMM must be the same as the settings on the application software 115 How to connect a computer or Terminal with the RS 232 To connect the M3500A to a computer or terminal a proper interface cable is essential Most compute
47. ICOTEST M3500A 21 Input Platinum Input LO RTD Note Source current flows from the INPUT HI to INPUT LO terminals Figure 3 13 45 4 PICOTEST M3500A 5 err 2 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 D Use terminals switch to select front terminals Q 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 transducer 4W and unit using CONFIG 46 TEMP and lt or b When ready press ENTER button For more information refer to the section 4 1 8 Press TEMP button Place RTD in the desired position and take the reading on the display e xX Note When you conduct the 3 wire RTD measurement the input LO and sense LO have to be connected in short condition Note Source means RTD Probe RTD Simulator PICOTEST M3500A Source In Short Condition Figure 3 15
48. ITIO 9o 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 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 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 Ratio DC Reference Voltage 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 79 Press CONFIG RATIO and then use 4 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 4 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 Note To close this funct
49. LIB 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 185 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 if PviOpenDefaultRM usb NULL PviFindRsrc usb NULL PviClose usb NULL PviOpen usb NULL PviWrite usb NULL PviRead usb NULL PviSetAttribute usb NULL FreeLibrary RUSBTMCLIB hUSBTMCLIB NULL MessageBox NULL NIVISA for USBTMC library not ready M3500 multimeter device test MB OK return printf n Start C Example program 33 33 printf We check the M3500 multimeter on USB port and n printf identify the first connected M3500 device n n Open Device Resource Manager
50. 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 VOLTage AC RANGe AUTO OFF ON VOLTage AC RANGe AUTO CURRent DC RANGe AUTO OFF ON CURRent DC RANGeAUTO CURRent RANGe AUTO OFF ON CURRent AC RANGe AUTO RESistance RANGe AUTO OFF ON RESistance RANGe AUTO FRESistance RANGe AUTO OFF ON 122 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 resolution VOLTage DC RESolution MINimum MAXimum VOLTage AC RESolution resolution MINimum MAXimum VOLTage AC RESolution MINimum MAXimum CURRent DC RESolution resolution 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
51. NCE hUSBTMCLIB for USBTMC HANDLE unsigned long defaultRM usbtmc m instr usbtmc unsigned long m findList usbtmc unsigned long m nCount ViStatus status int m Timeout 7000 char pStrout 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 IRUSBTMCLIB t MessageBox NULL NIVISA for USBTMC library not found M3500 184 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 timeout unsigned long vi signed long stdcall PviClose usb unsigned long vi signed long stdcall PviWrite usb unsigned long 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 PviSetAttribute usb unsigned long vi unsigned long viAttr unsigned long attrstat PviOpenDefaultRM usb signed long stdcall unsigned long GetProcAddress hUSBTMC
52. 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 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 100mV 1V and 10V ranges With AUTO OFF the input resistance is fixed at 10 for all ranges 154 INPut IMPedance AUTO Query 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 channel Set channels which need to be closed The range is from channel 1 to 10 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 means it hasn t been inserted yet ROUTe SCAN FUNCtion channel 1 function 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 Resista
53. OFFSet lt value gt MAXimum MINimum 4 3 5 Limits Test The limits testing operation allows you 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 You can specify the limit values and the values are stored in a volatile memory The default values for both upper and lower limits are O This function is available to all except continuity and diode measurements Note You can also use this HI LO measurement as a Pass Fail application through the USB interface s Pin 2 and Pin3 But the USB interface has to be turned off by pressing MENU gt gt INTERFACE gt ENTER gt gt INTERFACE gt ENTER gt USB gt ENTER gt DISABLE gt ENTER 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 you need to configure the LIMITS math function by pressing CONFIG SHIFT RATIO and then use 4 and to locate either lower limit MIN or upper limit MAX Press ENTER to select the limit you wish to set Then use 4 and to move through the digits and 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 85 665560 2004000
54. Perature SPRTD RZERo MINimum MAXimum Query the sensor R value at 0 degree Celsius SENSe TEMPerature SPRTD A4 1 value gt Set the A4 coefficient SENSe TEMPerature SPRTD A4 MINimum MAXimum Query the A4 coefficient SENSe TEMPerature SPRTD B4 4 value 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 Query the A coefficient SENSe TEMPerature SPRTD BX value 152 Set the B coefficient SENSe TEMPerature SPRTD BX MINimum MAXimum Query the B coefficient SENSe TEMPerature SPRTD CX 1 value gt Set the C coefficient SENSe TEMPerature SPRTD CX MINimum MAXimum Query the C coefficient SENSe TEMPerature SPRTD DX 1 value gt 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 comman
55. Q 100 MQ 100 ms Remote Interface 20 Hz 1 05 External Trigger Single Trigger 200 Hz 600 ms PLC 1 77 Front Panel w Auto 200 ms Trigger On 100 ms Remote Interface 1 0 5 External Frequency Period Front Panel w Auto 0 S Trigger ON How to specify a delay time You 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 4 and gt buttons to 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 to 3600 second The locations of the buttons are shown with red rectangle frames in Figure 4 13 PREV NEXT gt ko ee Figure 4 13 Remote Interface Operation 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 78 or TRIGger DELay AUTO OFF ON 4 3 Math Operations This section will introduce the mathematical operations in M3500A There are eight math operations R
56. RESolution resolution 58 FREQuency APERture 0 01 0 1 1 MIN MAX PERiod APERture 0 01 0 1 1 MIN MAX You can specify the resolution in the same units as the measurement function not in number of digits For instance specify the resolution in volts and the frequency in hertz The examples are in the following CONF VOLT DC 10 0 001 4 1 2 digits on the 10 Vdc range MEAS CURR AC 1 1E 6 6 1 2 digits on the 1 A range CONF FREQ 1 KHz 0 1Hz 1000 Hz input 0 1 Hz resolution VOLT AC RES 0 05 50 mV resolution on the ac function 4 1 4 DC Input Resistance Definition To reduce the effect of loading errors due to the input resistance M3500A allows you to select a much larger input resistance gt 10G 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 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 and can not be changed Also note that 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 p
57. 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 Set the RTD type SENSe TEMPerature RTD TYPE Query the RTD type SENSe TEMPerature RTD RZERo lt value Set the R Zero constant for the RTD type SENSe TEMPerature RTD RZERo MINimum MAXimum Query the R Zero constant for the set RTD type SENSe TEMPerature RTD ALPHa lt va ue gt MINimum MAXimum Set the alpha constant SENSe TEMPerature RTD ALPHa MINimum MAXimum Query the alpha constant for the set type 151 SENSe TEMPerature RTD BETA value 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 value 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 value Set the sensor R value at 0 degree Celsius SENSe TEM
58. Reading Memory Store 8 Recall 97 4 4 4 Sensitivity Band 99 4 4 5 Scanning Scal usasqa eene emi 100 4 4 6 Stepping Step o ccccccccccccccccscsccsssesscsesssececsessescsesscecsessessseseeesseseeeeseseeeees 104 4 4 7 Initial Mode escasos Re e RE 105 4 4 8 Language eene 107 4 4 9 Error CORdition x dte dut eu rs 107 4 4 10 Firmware Revision ssa HR Ree 108 4 4 11 Calibration Information sss 109 424 427 uoce 110 5 REMOTE INTERFACE OPERATIONS 115 5 1 PASS FAIL OUTPUT VIA USB CONNECTOR 2 117 5 2 SETTING UP FOR REMOTE 118 5 3 REMOTE INTERFACE COMMANDS 119 6 5 u u pan asnan apas anqas 131 5 1 ERROR TYPE u uu sz REED 131 61 1 EXCCULION ErrOFs sc tie amete e te 131 Ieri EUR Ter idee Pe bes 136 A SPECIFICATION IST aine ti obiit atia et sro doro eves 136 B GENERAL 140 C REMOTE INTERFACE REFERENCE asa uu oaa 141 C 1 An Introduction to the SCPI Language 141 C 2 Output Data Formats a
59. Source Chassisg Ground Figure 2 16 2 3 2 The Display M3500A 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 ADRS RATIO 4W EXT AUTO Figure 2 17 30 2 3 2 1 Annunciators at Upper Side ADRS MAN TRIG HOLD MEM RATIO MATH FILT Figure 2 18 ADRS Indicates the multimeter is controlled via GPIB Interface e RMT REMOTE Indicates the remote state USB Interface e MAN Indicates the manual range is taken TRIG Shows the single triggering is enabled HOLD Indicates reading hold function is enabled e MEM Indicates the using of internal memory RATIO Indicates the dcv dcv ratio operation MATH Indicates the MATH operation is taken ERR Error occurs e SHIFT Indicates SHIFT button is pressed REAR The rear panel input terminal is selected for the measure
60. Strout 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 printf output READ n status PviRead usb m instr usbtmc pStrin 64 amp nRead if nRead gt 0 1 for len 0 len long nRead len t 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 IRUSBTMCLIB return m nCount 0 m defaultRM usbtmc 0 190 FreeLibrary RUSBTMCLIB hUSBTMCLIB NULL return 191 DECLARATION OF CONFORMITY EST According to ISO IEC Guide 22 and CEN CENELEC EN 45014 Conformity with the following European Directives The product herein conforms with the requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 2004 108 EC and goes with the CE Marking accordingly Conformity with the following product standards Manufacturer Name Picotest Corp Manufacturer Address 5F 1 286 9 Hsin Ya Rd 80673 Kaohsiung Taiwan Declaration of Product Product Name 61 2 Digit Digital Multimeter Model Number M3500A Product Access
61. TATe 56 4 1 3 Resolution Setting Digits Definition While measuring DC and resistance resolution with the number of digits on a multimeter is visible You 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 you can select 6 5 digit resolution For a faster measurement you can select 4 5 digit resolution While measuring AC the default of the resolution is 5 5 digits Under frequency and period measurements the way of the Aperture Time and the Gate Time are similar to the integration time s You can set 10ms at 4 5 100ms at 5 5 and 1s at 6 5 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 You can select different resolution for different measurement function Default The default value for the resolution is slow 5 5 digits 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 How to set the resolution The resolution can be set either through the front panel or the remote interface operation Fro
62. TER Or skip this step if you wish to use the default voltage bound Press SHIFT CONT buttons to select the diode testing function and observe the reading on the display PICOTEST M3500A 8888888888888 PPc Roy Zener General purpose diode diode Joo Note Source current flows from the INPUT HI to INPUT LO terminals Figure 3 11 42 3 7 Temperature Measurements The M3500A supports thermocouples and resistance temperature detector RTD types of probes For thermocouples M3500A supports 7 types E 1 S and 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 M3500A is PT100 Temperature Range 200 850 and the thermocouple is type Table 3 1 Temperature Ranges for Each Thermocouple Type Sensor Type Temperature Range C B 600 1820 0 2316 E 250 1000 J 210 1200 K 200 1372 N 200 1300 R 0 1767 5 0 1767 T 250 400 43 3 7 1 Thermocouple Measurements Connect the thermocouple adapter to the banana jacks on the front panel The difference between each type is subject to the patch thermal
63. Temperature 40 C to 70 Operating Altitude Up to 2000m Dimensions for Rack WxHxD 213 6 x 88 6 x 370 0 mm Weight 3706 g Safety IEC61010 1 2001 EN61010 1 2001 27 Edition Over Voltage Category CAT II CAT I 1000V UL61010 1 2004 Installation CAT II Measurement CAT III at max 1000V Pollution Degree 2 EMC EN61326 1 2006 EN61326 2 1 2006 EMI CISPR 11 1997 A1 1999 A2 2002 Class IEC61000 3 2 2000 IEC61000 3 3 1994 A1 2001 EMS 61000 4 2 1995 1 1998 2 2000 61000 4 3 2002 61000 4 4 2004 61000 4 5 1995 1 2000 61000 4 6 1996 1 2000 61000 4 8 1993 1 2000 61000 4 11 1994 1 2000 11 The LO jack is marked with 500Vpk against ground and SENSE HI to LO is only marked with 200Vpk in opposition to the label of 600V CAT II and or 1000V CAT I against ground and IEC 61010 1 140 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
64. 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 C 2 THE CONFigure FUNCTION Public Declare Sub Sleep Lib kernel32 ByVal dwMilliseconds As Long Sub main Rem JEJE E EHE E TEE E EHE E EHE E EHE E HE HE E EHE E HE HE E EHE E EHE E HE EE EE Rem Rem Using NI VISA library visa32 dll Rem Rem Set sample count 5 configuration and Rem read the trigger Rem Rem 3E E E HE HE E TEE E HE HE E HE HE E EHE E HE HE E EHE E HERE E EHE E HE HERE EHE E HE EE ERE 180 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 viOpenDefaultRM dfltRM If stat VI SUCCESS Then Rem Error initializing VISA exiting MsgBox USBTMC resource not found vbExclamation M3500 multimeter device test Exit Sub End If Rem Find all M3500 USBTMC instruments in the system stat viFindRsrc dfltRM USB 0 9 0x05E6 0xM3500 INSTR fList nList desc If stat VI SUCCESS Then Rem Error finding resources exiting MsgBox M3500 device not found vbExclamation M3500 multimeter device test viClose dfltRM Exit Sub End If Rem Open a session to each and determine if it matches stat viOpen dfltRM desc
65. a new offset measurement However Auto Zero ONCE issues an immediate offset measurement 4 1 2 Filter Filter is used to remove noises in measurement readings M3500A 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 53 detail in the subsequent sections respectively 4 1 2 1 AC Filter Definition You are 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 Defaults The factory default is 20 Hz Medium You can select the filter type as you 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 Table 4 2 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 How to set AC Filter in AC measurements You can set the AC Filter either through the front panel operation or through the remote interface operation Front Panel Operation Press CONFIG ACV button Use 4 and buttons to locate BAND WIDTH submenu and then press ENTER to select it Look for the desired
66. able However if there are too many messages generated before executing the OPC command the output buffer will be filled and the DMM will be interrupted to take readings About the Standard Event Register The standard event register reports the instrument event types below such as power on detected command syntax errors command execution errors self test calibration errors query errors or the moment of executing an OPC command Then through the enable 167 register all conditions will be reported in the standard event summary bit At the moment you have to write a decimal value by using the ESE command to set the enable register mask Note 1 The errors the DMM s error queue except reading the error queue by using SYSTem ERRor will be recorded by an error condition including bits 2 3 4 or 5 of the standard event register Note 2 In both the standard event register bit and the questionable data event register bits O 1 or 9 a reading overload condition can be reported all the time But in the DMM s error queue no error message will be recorded Bit Definitions for Standard Event Register Decimal Bit Definition Value All commands prior to and including an OPC command have been Operation Complete 1 executed 1 Not Used 2 Set to 0 The DMM output buffer was empty as the DMM tried to read from it 2 Query Error 4 Or a new command line was received bef
67. ach reading taken Figure 2 17 shows the USB connector series B And Table 5 1 shows the detailed connector information Figure 2 17 Table 5 1 If you disable the USB interface the Pass Fail output function will enable Contact Typical Wiring Signal Name Description Number Assignment 1 VBUS Red Floating 2 D White Limit Test Pass 3 D Green Limit Test Fail 4 GND Black GND automatically Please follow the procedure below to enable disable this function Procedure MENU S INTERFACE USB ENABLE DISABLE Or you can do this by the other way 117 Procedure CONFIG SHIFT RATIO OUTPUT ENALBLE DISABLE A Warning You can t use the USB interface if you want to enable the Pass Fail signal output You must use the GPIB interface for remote 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 You may use the M3500A application developed by PICOTEST 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 M3500A and your PC Install the M3500A 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 Note These
68. ailable 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 AVERage NULL LIMit MXB DB DBM FUNCtion STATe OFF ON STATe CALCulate PERCent TARGet value MINimum MAXimum PERCent TARGet MINimum MAXimum CALCulate AVERage MINimum AVERage MAXimum 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 value MINimum MAXimum LIMit UPPer MINimum MAXimum 126 CALCulate MXB MMFactor value MINimum MAXimum MXB MMFactor MINimum MAXimum MXB MBFactor lt va ue gt MINimum MAXimum MXB MBFactor MINimum MAXimum CALCulate DB REFerence value 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 M3500A provides some variant trigger operations You 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
69. al bar separates multiple parameter choices for a given command string Triangle brackets lt 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 many commands For example consider the following command VOLTage DC RANGe lt range MINimum MAXimum 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 142 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 Note If you send two quer
70. al injury 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 D Selects input signal connections on front or rear panel 2 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 8 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 PICOTEST M3500A DC Voltage Source 4904200 Input Resistance 10MQ on 1000V and 100V ranges gt 10GQ on 10V 1V and 100mV ranges Figure 3 1 PICOTEST M3500A AC Voltage Source AC IO Ale errr Input Impedence 1 in parallel with 100pF Warning Maximum Input 750V RMS 1000V peak 8 x 10 V Hz Figure 3 2 Note The rear panel terminals can also be used via the same procedures as the front panel terminals Refer to Figure 3 3 35
71. an 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 the multimeter waits before it makes a measurement through the first defined channel The configuration set by you is stored in a volatile memory and will be cleared after the meter is turned off PICOTEST M3500A Hote Front or rear terminals can be used Source rite BED Hote This card must be insert into PICOTEST M3500A 2 3 4 S ATTE 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 Note Setting range of scanner card is only limited on DCV ACV ACI Frequency Period and Resistance functions As to the current measurements you 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 only At the same time the DCV and MX B functions have to b
72. and CLS Clear M3500 status register stat viWrite sesn CLS 4 ret If stat VI SUCCESS Then MsgBox System command error CLS vbExclamation M3500 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 VI SUCCESS Then MsgBox System command error meas volt dc VbExclamation M3500 multimeter device test stat viClose fList Exit Sub End If Rem fetch the measure data stat viRead sesn readin 64 ret If stat VI SUCCESS Then MsgBox Read in data error vbExclamation M3500 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 VI SUCCESS Then MsgBox System command error system local vbExclamation M3500 multimeter device test 179 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 CONFigure 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
73. and AUTO TRIGGER buttons To disable it simply press AUTO TRIGGER The locations of the buttons are shown AUTO TRIGGER with red rectangle frames in Figure 4 12 5 MEN Figure 4 12 D Trigger delay This feature is useful for the user who needs a longer delay time to wait for the system to be stabilized The time needed to stabilize a measurement system is called the settling time The settling time depends on the measurement range cable properties and signal source 76 Defaults The default of the trigger delay is automatic M3500A 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 Table 4 4 Trigger Delay Measurement Function Setting Ti ime DCV DCI Q2 and 94 PLC gt 1 Q2 and 94 10 ms 10 M
74. anel operation or through the remote interface operation 59 Front Panel Operation Press CONFIG DCV and then use lt and buttons to locate INPUT R option Press ENTER to select it Then select desired value for the input resistance by pressing 4 or button Press ENTER to choose it Two values are available 10M or gt 10G The locations of these buttons are shown with red rectangle frames in Figure 4 4 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 10 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 threshold resistance can be set to any value between 10 and 10000 60 Default The factory default for continuity threshold resistance is 100 User s selection is stored in a volatile memory and the default value will be restored after the meter h
75. as been turned off How to set the threshold resistance You can change the threshold resistance only through the front panel 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 V buttons then press ENTER button to set the value The locations of these buttons are shown with red rectangle frames in Figure 4 5 CONFIG Figure 4 5 4 1 6 Range Manual amp 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 you 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 thresholds of maximum minimum readings 61 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 meter is power off Please refer to Table 2 1 on page 24 for the factory default range How to set the auto manual range You can set the auto manual range either through the fro
76. ath 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 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 right middle seam as shown in Figure 2 3 You might need a screwdriver to do so 16 Figure 2 3 Step 4 Turn it over to 220V position as shown in Figure 2 4 ZN 2 4 Step 51 Insert the voltage setting selector back into the socket and close the as shown in Figure 2 5 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
77. beet eA eh eite ee nein 26 2 3 M3500A FUNCTION INTRODUCTION 26 2 31 The ados nib eS era e BUS 26 2 3 2 The 30 2 3 2 1 Annunciators at Upper Side sse 31 2 3 2 2 Annunciators at Right Side sss 31 2 3 3 e e ein vete 32 BASIC MEASUREMENT FUNCTION 34 3 1 VOLTAGE MEASUREMENTS DC amp 34 3 2 CURRENT MEASUREMENTS DC amp AC 36 3 3 RESISTANCE MEASUREMENTS 2 amp 4 WIRE sse 38 3 4 FREQUENCY amp PERIOD 5 enn enn nennen nnne ens 40 3 5 CONTINUITY MEASUREMENTS E E nennen 41 3 6 DIODE 5 42 3 7 TEMPERATURE MEASUREMENT Sist tete 43 3 7 1 Thermocouple Measurements 44 3 72 RTD Meas rements dete re 44 3 7 2 1 2 Wire Measurements sse 45 3 7 2 2 3 Wire 00204424420 3 00000000 3508 46 3 7 2 3 4 Wire RTD 44244 20 2000000001000 00008081 48 4 FRONT PANEL OPERATION S 51 4 1 MEASUREMENT CONFIGURATION 2 4 2 2 4 42 4 0 0000000 0 0008 51
78. ber 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 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 address 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 A 20ms ADC measurement is performed and the result is checked against a limit of OV 20uV 111 605 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 Buffer1 offset out of range This procedure is to test the offset of buffer U507 The result is checked against a limit of 0 0 1mV 608 Buffer2 offset out of range This procedure is to test the offset of buffer 0508 The result is checked against a limit of 0 50 1 609 DC gain x1 failed This procedure is to test the tolerance of DC gainx1 amplifier The limit
79. ble only for this measurement 83 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 4 and buttons to move through the digits 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 Note Press NULL again to disable this feature The MATH anunnciator on the display indicates the state of a mathematical feature CONFIG NULL C R m ENTER lt 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 84 NEXT gt CALCulate NULL
80. ce 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 you select 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 function range resolution MEASure function range resolution SENSe function RESolution resolution Or you can set integration time directly by the following commands 63 SENSe VOLTage DC NPLCycles 0 02 0 1 1 10 MINimum MAXimum SENSe VOLTage DC NPLCycles MINimum MAXimum SENSe CURRent DC NPLCycles 40 02 0 1 1 10 SENSe CURRent DC NPLCycles MINimum MAXimum SENSe RESistance NPLCycles 40 02 0 1 1 10 SENSe RESistance NPLCycles MINimum MAXimum SENSe FRESistance NPLCycles 0 02 0 1 1 10 MINimum MAXimum SENSe FRESistance NPLCycles MINimum MAXimum For frequency and period measurements aperture time or gate time is anal
81. ce of dry and clean cloth 1 5 Safety Information A Caution Please read through the following safety information before using the product To avoid possible electric shock or personal injury please read and follow these guidelines carefully e 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
82. cify a delay time from 0 to 3600 seconds 159 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 SAMPIe COUNt 1 value Set number of readings samples the multimeter takes per trigger Select a number from 1 to 50 000 readings per trigger SAMPIe COUNt MINimum MAXimum Query the sample count TRIGger COUNt value 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 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 m
83. d 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 SENSe FREQuency APERture MINimum MAXimum Query the gate time or aperture time for frequency function 153 SENSe PERiod APERture 0 01 0 1 1 M INimum 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 SENSe PERiod APERture MINimum MAXimum Query the gate time or aperture time for period function SENSe DETector BANDwidth lt 3 20 200 Specify the lowest frequency expected 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 0
84. dard So you can apply the OPC command to ensure that commands sent to the instrument previously have completed And to execute a serial poll before applying RST CLS or other commands have completed can let pervious conditions be reported Read the Status Byte by using STB The STB command status byte query is like a serial poll except it acts similar to any other instrument command This command returns the same result as an IEEE 488 serial poll except that the request service bit 6 isn t cleared if a serial poll has occurred And the IEEE 488 bus interface hardware can t automatically handle the STB command It will work only after previous commands have completed and it s impossible to poll by using the STB command Moreover to use this command doesn t clear the status byte summary register Procedures of Interrupting the Bus Controller by Using SRQ Send a bus device clear message Clear the event register by using the CLS command e Set and SRE commands to enable masks Send the OPC command and enter the result to enable synchronization e Enable the bus controller s 488 SRQ interrupt Procedures to Determine When a Command Sequence is Completed e Clear the DMM s output buffer by sending a device clear message Clear the event registers by using CLS command 166 Enable operation complete by using the ESE 1 command e Send the OPC command and enter the result to
85. ddress 31 is not a valid address if you are operating the multimeter from the HP IB interface with a bus controller 175 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 M3500A sample collection Visual Basic Learn how to create and use PICOTEST 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 Visual C In MFC application you can override PICOTEST 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 DCV measurement This is the easiest 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 th
86. e 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 131 104 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 e 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 e 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 incorrectly specified for a numeric parameter e 138 Suffix not allowed A suffix was received following a numeric parameter which does not accept a suffix 132 148 Character not allowed A discrete parameter was received but a character string or a numeric parameter was
87. e enabled For more current measurement via the scanner card please refer to User s Guide for the Scanner Card Remark 1 In the default situation current shunts are not installed in 101 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 you release the shunts of the R1 and R2 Note The Information regarding the Limitation of Input Signals Scanner Card is in the following statement 10 Channels 10 channels of 2 pole relay input All channels configurable to 4 pole CAPABILITIES Multiplex one of ten 2 pole or one of five 4 pole signals into DMM INPUTS Maximum Signal Level DC Signals 110V DC 1A switched 30VA maximum resistive load AC Signals 125V AC rms or 175V AC peak 100kHz maximum 1A switched 62 5VA maximum resistive load Contact Life gt 100000 operations at maximum signal level 100000000 operations cold switching Contact Resistance lt 1 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 10V 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 Maximu
88. e of the ac section is measured and checked against a limit of 10mV to 70mV 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 113 input capacitor C614 This produces a pulse on the output of the rms to dc converter which is sampled 100ms after the current is applied A 20ms A D measurement is performed and checked against a limit of 2V to 13V into the ADC 622 DC 10V reference failed This test configures to the 10V dc range with 5V input applied A 20ms ADC measurement is performed and the result is checked against a limit of 4 55V 0 15mV 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 650 Front End MCUs Firmware Version Error System Error 660 Firmware Version Error 661 External Memory Verion Error 662 Calibration Version Error 663 Scanner card Version Error 664 Temperature Version Error 665 GPIB Version Error 666 RS 232 Version Error 668 Manual Calibration Version Error 669 Self Test Version Error 670 Command Version Error 114 5 Remote Interface Operations M3500A supports three remote interfaces the built in USB USBTMC optional
89. e startup object for a Windows Application to Sub Main 3 Add New Module and declare a Sub Main 176 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 Note When using a custom Sub Main procedure as the Startup object code in the Application events Startup Shutdown Startup Next 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 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 t
90. easurements when a 160 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 0 OFF or 1 ON DISPlay TEXT quoted string 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 SYSTem BEEPer STATe OFF ON Disable or enable the beeper SYSTem BEEPer STATe Query the beeper mode Returns 0 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 161 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 me
91. ed with the PT TOOL software Please refer to the 5 7 procedures of the Application 1 x Note If the input source exceeds the specification ACV 750V DCV 1000V the display will Show OVLD Front Panel Operation To set the values of M and B you need to configure this math function by pressing CONFIG and SHIFT 9o Use lt and D to switch between and B Press ENTER on your selection Then use and to move through the digits and use and to increase or decrease the number to a desired value Press ENTER to set the value You need to set the values of M and B first Then Select a measurement function and press SHIFT to activate function as shown as Figure 4 20 CONFIG lt PREV N NEXT gt mm mm L ENTER Figure 4 20 89 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 value CALCulate MXB MMFactor MINimum MAXimum CALCulate MXB MBFactor value 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 d
92. ee nera cie 145 The MEASure Command sss 145 4 The CONFigure sss 147 C 5 The Measurement Configuration 149 C 6 The Math Operation Command sse 156 C 7 The Triggering sse 159 C 8 The System Related Commands 5 sse 160 9 The SCPI Status Pattern sss 162 C 10 Status Reporting Commands sss 170 C 11 SCPI Compliance Information sse 172 C 12 IEEE 488 Compliance Information sse 174 D ABOUT APPLICATION 176 1 General Information This section contains general information about PICOTEST M3500A 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 M3500A is a 6 5 digit digital multimeter It has 0 0015 24 hour basic DC voltage accuracy at 10V range 0 002 24 hour basic resistance accuracy at 10kO 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 M3500A provides wide measurement ranges Note The 24 hour measurement is subject to cal
93. er 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 170 ESE enable value 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 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 the 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
94. er 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 NOTE Default parameters are shown in bold italic SENSe FUNCtion VOLTage DC FUNCtion VOLTage DC RATio FUNCtion VOLTage AC FUNCtion CURRent DC FUNCtion CURRent AC FUNCtion RESistance 2 wire FUNCtion FRESistance 4 wire FUNCtion FREQuency 121 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 4 range 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 CURRent AC RANGe MINimum MAXimum RESistance RANGe 4 range gt RESistance RANGe MINimum MAXimum FRESistance RANGe lt range gt
95. expected e 151 Invalid string data An invalid character string was received e 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 e 211 Trigger ignored A Group Execute Trigger GET or TRG was received but the trigger was ignored e 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 e 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 133 e 222 Data out of range A numeric parameter value is out of range e 223 Too much data A character string was too long e 224 Illegal parameter value A discrete parameter was received which was not a valid choice for the command e 230 Data Stale A FETCh Command was received but the memory was empty 350 Too many errors The error queue is
96. first configure the mulitmeter by choosing the desired function range and resolution Specify the trigger source from which the multimeter will accept the trigger The multimeter takes immediate internal trigger a software trigger from 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 127 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 COUNt lt value gt gt COUNt MINmum MAXimum TRIGger COUNt lt value gt MINimum MAXimum INFinite COUNt MINmum MAXimum SYSTEM RELATED Commands 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 quoted string TEXT TEXT CLEar 128 SYSTem BEEPer
97. ge DC RATio range MIN MAX DEF resolution 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 measurement The specified range applies to the source signal and autorange is selected for the reference signal CONFigure VOLTage AC range MIN MAX DEF 1 resolution MIN MAX DEF 147 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 CONFigure CURRent DC lt range MIN MAX DEF 4 resolution MIN DEF Preset and configure the multimeter for DC current measurements with the specified range and resolution This command does not initiate the measurement CONFigure CURRent AC lt range MIN DEF 1 resolution 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 672 digits Therefore the resolution parameter only affects the front panel display CONFigure RESistance range MIN MAX DEF 1 resolution MIN MAX DEF Preset and configure the multimeter for 2 wire measurements
98. gits 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 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 57 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 Connections 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 you want to get a very small signal via the application of a BNC to Banana Adapter Please refer to the Figure 2 16 29 M3500A Digital Multimeter BNC to Banana Adapter
99. h the multimeter please pull out the handle from the multimeter as shown in Figure 1 2 Figure 1 2 II Adjusting the position for your convenience Here are some referable positions for your reference Position 1 The default position is for packing as shown in Figure 1 3 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 is with the handle as shown in Figure 1 5 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 Warning some areas the power supplied voltage is 240 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 Warning The power supplied with M3500A 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 de
100. he Startup with custom Sub Main checkbox 4 Select Sub Main from the Startup object drop down list LISTING C 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 177 Dim desc As String VI FIND BUFLEN Dim nList As Long Dim ret As Long Dim readin As String 64 stat viOpenDefaultRM dfltRM If stat VI SUCCESS Then Rem Error initializing VISA exiting MsgBox USBTMC resource not found vbExclamation M3500 multimeter device test Exit Sub End If Rem Find all M3500 USBTMC instruments in the system stat viFindRsrc dfltRM USB 0 9 0x05E6 0xM3500 INSTR fList nList desc If stat VI SUCCESS Then Rem Error finding resources exiting MsgBox M3500 device not found vbExclamation M3500 multimeter device test viClose dfltRM Exit Sub End If Rem Open a session to each and determine if it matches stat viOpen dfltRM desc VI NULL VI NULL sesn If stat VI SUCCESS Then MsgBox Open device failed vbExclamation M3500 multimeter device test stat viClose fList Exit Sub End If Rem send reset command RST reset M3500 stat viWrite sesn RST 4 ret If stat VI SUCCESS Then MsgBox System command error RST vbExclamation M3500 multimeter device test 176 stat viClose fList Exit Sub End If Rem send Clear comm
101. he front amp Rear Bumpers but without the handle is in the following Picture 3 LxWxD 224x113x373 mm 370 0mm Q 255 0mm 373 0mm geeesssl 5 218 gs ay E U D 224 0mm 373 0mm 3 X 113 0mm 9 2 Overview This chapter will give you an overview of M3500A s basic features and guide you through the basics of M3500A digital multimeter You will become familiar with those features after reading this chapter 2 1 Setting up Your M3500A Digital Multimeter You may want to check if your multimeter is ready for measurement In fact all of the Picotest products are inspected perfectly before being shipped 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 having any doubt of your products you are encouraged to contact the 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 wit
102. ibration accuracy e DC voltage 0 1 1V 10V 100V amp 1000V AC voltage 0 1V 1V 10V 100V amp 750V DC current 10mA 100mA 1A amp 1A amp 2 amp 4 wire resistance 1000 1KQ 10KO 100KO 1MO 10 100MQ Frequency From 3Hz to 300kHz Period measurement Diode measurement Continuity measurement for resistance Thermocouple temperature amp RTD measurements Some additional capabilities of M3500A include Full math functions dB dBm MX B ratio 9o Max Min null amp limits Optional multipoint scanner card For internal scanning options including 3500 01 a 10 channel amp M3500 opt09 a 20 channel general purpose cards USB and GPIB RS 232 Optional remote control interfaces Through Microsoft Office Word amp Excel for remotely storing and recalling the measured values Through M3500 AP software for simulating the real operation on PC 1 2 Warranty Information If the equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired 1 3 Warranty PICOTEST 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
103. icon pictures and words will be changed or edited with different versions without informing Q M35EXA_AP M3510A USBTMC TW00005971 String Received PICOTEST 3510 00005971 1 06 06 01 10 Figure 5 1 Figure 5 2 Figure 5 3 116 How to set up for GPIB interface Insert GPIB interface card into the interface slot on the rear panel Install the M3500A 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 You can instruct the multimeter to take measurements using the SCPI commands after the appropriate setup for your selected remote interface The following conventions are used in SCPI command syntax Triangle brackets 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 automatically sets the other parameters for you make the measurement and send the re
104. icular reasons 1 3 Precaution of Operation Please carefully read the manual before operating this device This manual is for reference only 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 e 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 PICOTEST CORP and they aren t allowed to be used by others without permission 1 4 Upkeep of M3500A e Although M3500A multimeter is very durable and weather resistant care should be taken not to expose it to severe impact or pressure Keep M3500A far from water and damp environment Calibration will be taken every year Please contact with your local service representative for more information e Ifthe 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 e Wipe the surface of M3500A multimeter with a pie
105. ing 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 M3500A you can specify a variety of trigger settings including the number of samples per trigger the number of triggers per event reading hold and the trigger delay for your measurements 74 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 buttons Press ENTER to choose TRIG option Again locate N SAMPLE submenu using lt and buttons and then press ENTER to select it Then set the desired number by pressing V buttons to increase or decrease the number and using lt and b buttons to move
106. ion please press one of the measurement function buttons Note The max DC input voltage is 1000 V and the max DC reference voltage is 200 V CONFIG RATIO SS s gt J ti JA ENTER g 25 5 71 2 ma umm mie Figure 4 14 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 80 Input Reading 100 Target Value 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 you need to configure Percent function by pressing CONFIG then use lt and b to move through the digits A and buttons to increase or decrease the numbers to a desired target value Press ENTER to set the value Press to activate this
107. ion to adjust this sensitivity band Default 99 The default band is 0 1 Your 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 4 and buttons to find TRIG submenu Press ENTER to select it Then again use 4 and gt buttons to find READ HOLD submenu Press ENTER to choose it Then use 4 and 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 Figure 4 30 4 4 5 Scanning Scan You can purchase an optional scanner card for multi function applications We provide three kinds of the cards 3500 01 10 CH for general purpose as the example below M3500 opt09 20CH for general purpose and M3500 opt12 10 CH for general purpose plus thermocouple and RTD measurements When using it it s important to press the Terminals on the front panel in order to change the control to the rear For more information refer to their user s guides This multipoint scanner card lets you switch and scan many channels of 100 input signals You c
108. ld 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 5 The measured value will be shown on the display automatically Meter beeps when measured resistance value is lower than threshold value PICOTEST M3500A 8 8888888888888 Q2 Resistance Under Test Note Source current flows from the INPUT HI to INPUT LO terminals Figure 3 10 41 3 6 Diode Measurements M3500A 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 connected to HI of the input terminals and the negative end to LO of the input terminals How to measure diode D Selects input signal connections on front or rear panel Connect the diode to the terminals For forward bias connect the probe from 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 3 Set voltage bound via pressing CONFIG SHIFT CONT buttons When ready press EN
109. le 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 External Triger Terminal You can trigger the M3500A by using a low true pulse to the Ext Trig external trigger terminal located on the rear panel And to use this terminal via the remote interface you have to select the external trigger source by using the TRIGer SOURce EXTernal command AL gt 1 us Note You can use simple switch to generate an external trigger by using the Ext Trig input as shown in the following 73 VM COMP Voltmeter Complete Terminal The real panel VM COMP terminal provides a low true pulse after finishing each measurement The VM COMP and external trigger shown below provides a standard hardware handshake sequence between measuremen and switching devices Output 5 AL Approximately 2 us 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 a command from your PC to the multimeter to generate an event For using software trigger use the follow
110. leads x Note Only connection via the front panel be used for temperature measurements How to measure thermocouple Use terminals switch to select terminals on the front panel To measure thermocouple you must use a thermocouple adapter and a sensor K type for example with the low thermal patch lead as shown in Figure 3 12 9 Configure the thermocouple type and unit using CONFIG SHIFT TEMP such as K TYPE and 9C When ready press ENTER button Press SHIFT TEMP buttons 5 Take the reading on the display _ pru f a m 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 44 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 D Use terminals switch to select front terminals 2 Insert a specified adapter into the front terminals Connect the low thermal patch leads to the adapter as shown in Figure 3 14 3 Configure sensor type transducer 2W and unit using CONFIG TEMP and lt 4 or When ready press ENTER button For more information refer to the section 4 1 8 Press TEMP button 5 Place RTD in the desired position and take the reading the display P
111. m Voltage Between Any Terminal and M3500A Input LO 200V peak ENVIRONMENTAL Meets all M3500A environmental specifications M3500A opt01 Scanner Card Configuration amp Speed List m OUTB 1 oTo gt 4 Pole 4 L oTo 100 0 C To oT 100 0 oto 100 0 HI LOo o o HI HI Loc HI LOO Channel 1 Channel 2 Channel 3 Channel 4 Channe 5 3500A opt01 Channel 6 Channel 7 Channel 8 Channel 9 Channel10 Speed of Scanner Card Measurement 102 AutoZero OFF AutoGain OFF AutoRange OFF Scan Timer 0 60Hz NPLC Take Time with 2000 Readings sec rate ch s Fast 4 5 0 02 68 29 4 single Slow 4 5 amp Fast 5 5 0 1 74 27 0 function VDC Slow 5 5 amp Fast 6 5 1 105 19 0 Slow 6 5 10 408 4 9 AutoZero OFF AutoGain OFF AutoRange OFF Scan Timer 0 60Hz NPLC Take Time with 2000 Readings sec rate ch s Fast 4 5 0 02 306 6 5 Mix function Slow 4 5 amp Fast 5 5 0 1 318 6 3 VDC 2WRES Slow 5 5 amp Fast 6 5 1 442 4 5 Slow 6 5 10 1710 1 2 How to program each channel with measurement function Press CONFIG SHIFT DIGITS for scanning configuration Use i and gt to scroll through submenus Press ENTER on SET SCAN CHA submenu Use lt and D to switch from channel 1 to channel 10 and use V to switch among the measurement functions Leave an u
112. measurements the meter uses only one range for all inputs between 3Hz and 300kHz With no input signal applied frequency measurements return 0 146 MEASure PERiod lt range resolution MIN 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 3 3 sec With no input signal applied period measurements return 0 MEASure CONTinuity Preset and make a continuity measurement The reading is sent to the output buffer The range and resolution are fixed at 1k and 5 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 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 MIN MAX DEF 1 resolution MIN Preset and configure the multimeter for DC voltage measurements with the specified range and resolution This command does not initiate the measurement CONFigure VOLTa
113. mediate trigger mode a trigger will be issued immediately as soon as the meter is in wait for event state 71 How to use Immediate Trigger Use the following command in your PC terminal to set the internal 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 you press 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 ready 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 SINGLE Figure 4 10 4 2 2 Trigger Source In M3500A you can specify the trigger source to be one of these three options front panel operations external hardware trigger source and remote interface operations 72 Front Panel Operation Use the front panel buttons AUTO TRIGGER for auto triggering and SINGLE for single triggering External Hardware You apply a trigger pulse to the Ext TRIG BNC terminal on the rear panel External hardware triggering is like using sing
114. ment 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 e Indicates the diode testing operation is taken CW Not used for Model M3500A 4W EXT CC Not used for Model M3500A 1 AUTO e CV Not used for Model M3500A EXT Indicates the External Trigger Mode is enabled LOCK Indicates the front panel menu operation CW is locked cc OVP Not used for Model M3500A CV OCP Not used for Model M3500A e OFF Indicates the front panel display is turned off Figure 2 19 31 2 3 3 The Rear Panel The rear panel of the M3500A 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 e LOG amp I Used for making DC and AC current measurements Rear Fuse Secures your Meter against damage of strong current pulse 2 BNC Connections e 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 environmen
115. mmand RST or device clear in event registers won t clear bits To query an event register will return a decimal value corresponding to binary weighted sum of all bits set in the register An enable register is readable and writable and can define which bits in the corresponding event register are ORed together to generate a single summary bit To query an enable register won t clear it as well the command CLS but it can clear the bits in the event registers And the command STATus PRESet will clear the questionable data enable register Moreover to enable bits in an enable register you have to write a decimal value corresponding to the binary weighted sum of the bits in the register by your demands Binary Weights 163 Questionable Data Event Register Enable Register Voltage Overload Current Overload Not Used Not Used Not Used Not Used Not Used Not Used O OR Not Used 4 Status Byte Ohms Overload Summary Register Enable Register Not Used 0 Limit Test Fail LO Not Used Limit Test Fail Not Used 3 OR Not Used 4 Message Available 9 Not Used 5 Standard Event STAT QUES EVEN STAT QUES ENAB values 6 STAT QUES ENAB Standard Event SRE SUMU Event Register Enable Register Operation Complete Output Buffer Device Error 9 Execution Error o OR Command Error NotUsed _ ESR ESE value ESE About
116. mory 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 The SCPI Status Pattern Status registers are provided in the same way by all SCPI equipment And there are three register groups with various equipment conditions recorded by the status system They are the Status Byte Register the 162 Standard Event Register and the Questionable Data Register The Status Byte Register collects and records high level summary information which is reported in other register groups With the following diagram illustration you would make themselves clear for the SCPI status system In addition the Standard Event and the Questionable Data Registers have event registers which belong to read only registers and report defined conditions in a multimeter Bits are latched in the event registers As long as an event bit is set subsequent state changes will be ignored Besides bits in an event register are cleared automatically by the commands for example ESR STAT QUES EVEN or CLS Please note that the reset co
117. mum RESistance NPLCycles 0 02 0 1 2 10 MINimum MAXimum RESistance NPLCycles MINimum MAXimum FRESistance NPLCycles 0 02 0 1 2 10 MINimum MAXimum FRESistance NPLCycles MINimum MAXimum SENSe FREQuency APERture 40 01 0 1 1 gt FREQuency APERture MINimum MAXimum PERiod APERture 0 01 0 1 1 MINimum MAXimum PERiod APERture MINimum MAXimum SENSe DETector BANDwidth 3 20 200 MINimum MAXimum DETector BANDwidth MINimum MAXimum 124 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 INPut IMPedance AUTO OFF ON IMPedance AUTO Scanner Card Configuration Commands ROUTe CLOSe lt channel gt ROUTe CLOSe ROUTe OPEN ROUTe STATe ROUTe SCAN FUNCtion channel 1 function VOLT DC VOLT AC FREQuency RESistance FRESistance NONE ROUTe SCAN FUNC channel ROUTe SCAN TIMER ROUTe SCAN TIMER value ROUTe SCAN COUNT ROUTe SCAN COUNT value ROUTe SCAN STATe ROUTe SCAN SCAN ROUTe SCAN STEP 125 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 av
118. n are fixed at 1Vdc with 1mA current source and 5 digits respectively CONFigure TEMPerature Preset and configure for a RTD measurement This command does not initiate the measurement The resolution is fixed at 6 digits CONFigure TCOuple Preset and configure for a thermocouple measurement This command does not initiate the measurement The resolution is fixed at 672 digits CONFigure Query a recent condition of function and return a quoted string C 5 The Measurement Configuration Command SENSe FUNCtion function Select a measurement function and enclose it in quotes in the command string FUNC VOLT DC Use one of the following strings VOLTage DC VOLTage AC VOLTage DC RATio CURRent DC CURRent AC RESistance for 2 wire ohms FRESistance 4 wire ohms FREQuency PERiod CONTinuity DIODe TCOuple TEMPerature SENSe FUNCtion Query the measurement function and return a quoted string SENSe function RANGe lt range gt MINimum MAXimum 149 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 function RANGe MINimum MAXimum Query the range for the selected function For frequency and period use FREQuency VOLTage or PERiod VOLTage Autorange thresholds
119. nce or disabling the channel ROUTe SCAN FUNC channel Query the channel s function on the scanner card ROUTe SCAN TIMER Read the time interval of scanning ROUTe SCAN TIMER value Set the time interval of scanning The unit is second ROUTe SCAN COUNT Read the number of times of scanning 155 ROUTe SCAN COUNT value Set the number of times of scanning ROUTe SCAN STATe Query a channel numeric which is being scanned ROUTe SCAN SCAN Run SCAN mode ROUTe SCAN STEP Run STEP mode C 6 The Math Operation Command CALCulate FUNCtion PERCent 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 value 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 CALCulate PERCent TARGet MINimum MAXimum Query the target value for percent math function 156 CALCulate AVERage MINimum Read the minimum value found during the Min Max operation The multimeter clears the value when Min Ma
120. nfiguration 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 4 and gt to move through the digits and and 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 CONFIG E FILTER ENTER x lt PREV N EXT gt a 655 O be oe 5550 x 2 Figure 4 32 4 4 7 Initial Mode The section contains two selections DEFAULT and SAVE DATA You 105 can select SAVE DATE to save the current configuration or select DEFAULT to restore the factory value after restarting M3500A The valid range of SAVE is listed in Table 4 5 Table 4 5 No Items of Save Data Contents 1 Continuity Threshold Resistance 2 Diode Boundary Voltage Sensor Types Units USER 3 Temperature RTD define SPRTD 4 Thermocouple Types Units R Junction 5 Step amp Scan Count Timer 6 dBm Reference Resistance 7 MX B Values M B 8 Reading Hold Sensitivity Band 9 Input R DC Input Resistance USB GPIB ADDR RS232 baud amp 10 Interface parity 11 System Language Beep IDN string
121. nt 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 57 function buttons located on the first row of your meter s front panel e Press DIGITS button to select your desired resolution for your measurement You 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 B Press CONFIG and then select a function as you wish from DCV DCI SHIFT DCV 02 24 SHIFT 02 FREQ and PERIOD SHIFT FREQ Press ENTER on RESOLUTION submenu If it is not shown on the display use 1 and to locate it Use 4 and gt to find your desired resolution Press ENTER on your choice x Note The options for frequency and period measurements are 4 5 slow 5 5 slow and 6 5 slow CONFIG DIGITS or ENTER 222 lt PREV NEXT gt SS p i Figure 4 3 Remote Interface Operation Use the following commands on your PC terminal to set the resolution for your measurement CONFigure function range resolution MEASure function range resolution SENSe function
122. nt 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 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 Ces 25 Ol 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 62 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 you to optimize either the speed or the resolution as well as the noise rejection 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 M3500A for you to select from 0 02 0 1 1 and 10 PLCs Default For DCV DCI and resistan
123. nt 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 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 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 1004 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 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 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 1mA 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 nois
124. nused 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 i and gt buttons to scroll through submenus Press ENTER to select OPERATION submenu Use lt and to switch among scan count COUNT scan interval TIMER and store STORE options Then press ENTER on your selection Use 1 and gt to move through the digits and Aand 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 i and gt buttons to scroll through submenus Press ENTER on when you need to close a specific channel Press ENTER again on CHANNEL Use 103 4 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 The locations of the buttons are shown with red rectangle frames in Figure 4 31 CONFIG DIGITS lt PREV NEXT gt S Es d
125. o 120 of the highest range for the present function 157 CALCulate LIMit UPPer Query the upper limit for the limit testing CALCulate MXB MMFactor value Set the value of M CALCulate MXB MMFactor MINimum MAXimum Query the value of M CALCulate MXB MBFactor 1 value gt Set the value of B CALCulate MXB MBFactor MINimum MAXimum Query the value of B CALCulate DB REFerence 4 value Store a relative value in the dB Relative Register You must turn on the math operation before writing to the math register You can set the relative value to any number between 0 dBm 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 when INITiate is executed The MEASure And CONFigure commands automatically select CALC With memory disabled DATA FEED RDG STORE readings taken using INITiate not
126. of gain tolerance is 0 005 610 DC gain x10 failed This procedure is to test the tolerance of DC gainx10 amplifier The limit of gain tolerance is 0 05 611 DC gain x100 failed This procedure is to test the tolerance of DC gainx100 amplifier The limit of gain tolerance is 0 5 612 Ohms 500 nA source failed This test configures to the 10V dc range with the internal 10M 100 1 divider R204 connected across the 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 limit of 5V t 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 54 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 112 615 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 4 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 curre
127. ogous 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 20 0110 111 1 SENSe PERiod APERture MINimum MAXimum The following table shows the relationship between the integration time and the measurement resolution Time PLC DEFAULT COMPATIBLE 0 0001 x Full Scale 0 0001 x Full Scale 0 00001 x Full Scale 0 00001 x Full Scale 0 000001 x Full Scale 0 000003 x Full Scale 0 0000001 x Full Scale 0 000001 x Full Scale 64 4 1 8 Sensor Selection for Temperature Measurements The multimeter supports both thermocouple and RTD You need to configure the multimeter for the right sensor type units and transducer before conducting temperature measurements RTD Definition If the RTD is used you have to confirm the RTD settings incl sensor units and transducer first throught the front penal operations or the remote control operation For the sensor options they are PT100 D100 F100 PT385 PT3916 user defined RTD NTCT and SPRTD For the unit options they are C F and K For the transducer options they are 2W RTD and 4W RTD 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 an
128. ome familiar with the M3500A DMM picotest will provide you the brief introduction of the basic M3500A DMM operations There are three major parts of M3500A 2 3 1 the front panel 2 3 2 the display and 2 3 3 the rear panel 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 2 34 5 Figure 2 15 Power amp Display Power Activates M3500A 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 measurement 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 ra
129. ont 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 is not shown on the display use 4 and gt buttons to locate it Press ENTER on ZERO Again use i and gt buttons to locate it if it is not shown on the display Press ENTER on AUTO ZERO option and then use 4 and to the ON or OFF Press ENTER by your 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 Table 4 1 Integration Time PLC Remote Digits Displayed Resolution DEFAULT COMPATIBLE DEFAULT COMPATIBLE Fast 4 Fast 4 a digits 4 Slow 4 digits 5 1 2 Fast 5 digits 5 gt Slow 5 digits 52 10 Slow 6 digits 6 Note To change resolution refer to Section 4 1 3 Resolution Setting in this chapter lt PREV NEXT gt 2 0 ENTER Figure 4 1 Remote Interface Operation To set Auto Zero through the remote interface use the following commands SENSe ZERO AUTO OFF ONCE ON The OFF and ONCE parameters have a similar effect Auto Zero OFF doesn t issue
130. ore a previous query has been read Or both the input and output buffers are full 3 Device Error 8 Error occurrence from a self test calibration or reading overlaod 4 Execution Error 16 Error occurrence from an execution 5 Command Error 32 Error occurrence from a command s syntax 6 Not Used 64 Set to 0 Since the last time the event register was read or cleared power has 7 Power On 128 been turned off and on The following conditions will clear the standard event register You send a CLS command e You query the event register by using the ESR command The following conditions will clear the standard event enable register e You turn on the power and have set the DMM previously by using the PSC 1 command 168 You execute ESE 0 command Note When the DMM is powered the standard event enable register won t be cleared if you have set the DMM previously by using BSC Q About the Questionable Data Register The questionable data register reports the quality of the DMM s measurement results as well overload conditions and high low limit test results Through the enable register all of the conditions can be reported in the questionable data summary bit At the moment you have to write a decimal value by using the STATus QUESTionable ENABle command to set the enable register mask Bit Definitions for Questionable Data Register
131. ories This declaration applies to all accessories of the above product s EMC EN61326 1 2006 EN61326 2 1 2006 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 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 Safety IEC61010 1 2001 EN61010 1 200 LC 24 PAER UL61010 1 2004 2 Si Be 80387244 8 TEL 8157188 24 4 13 Aug 2009 ME 7 1 E L Date Mr Hawk Shang General Manager For more information please contact your local supplier sales office or distributor 192
132. 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 You can store the readings and access to the stored readings through either the front panel operation or the remote interface operation Note Each datum stored from M3500A to remote interface will be in 97 a first in and first out condition Front Panel Operation Before using the reading memory feature you need 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 4 and buttons to move between the digits and A 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 Note 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 NUMBER STORE CONFIG 2 ui es lt PREV NEXT gt
133. r 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 M3500A Idle i Waiting for event Delay Sampling Trigger 1 Samples 1 Sample 1 Trigger 1 Trigger Operation Flow Chart Figure 4 8 70 4 2 1 Trigger Mode There are three trigger modes M3500A auto immediate and single triggering You can specify the trigger mode for your 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 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 M3500A 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 gt 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 im
134. reviously by using the PSC 1 command You execute a SRE 0 command XxX Note If you have set the DMM previously by using PSC 0 the status byte enable register won t be cleared at power on How to use SRQ Service Request and Serial Poll You have to set your bus controller to repond to the IEEE 488 SRQ and interrupt to use this capability Use the status byte enable register SRE to select the low level IEEE 488 SRQ signal set by summary bits As the status byte bit 6 is set an IEEE 488 SRQ interrupt message will be sent automatically to the bus controller which may poll the instruments on the bus to identify which one requested service To read the status byte which is using an IEEE 488 serial poll or to read the event register whose summary bit is cauing the service request will clear the request 165 One or more bits are set in the questionable data register Bits have service You send the IEEE 488 serial poll message to read the status byte summary register And to query the summary register will return a decimal value corresponding to the binary weighted sum of the bits set in the register And serial poll will clear the request service bit automatically in the status byte summary register but no other bits are affected i e to perform a serial poll won t affect instrument throughput Note The synchronization between the bus controller program and the instrument isn t able to be ensured by the IEEE 488 2 stan
135. rs and terminals belong to DTE Data Terminal Equipment devices including the DMM You must apply a DTE to DTE interface cable which is commonly called null modem modem eliminator or crossover cable DB 9 Female to Female pin The calbe pin diagram is shown below DB 9 Cable Female to Female 089 089 Male Female Troubleshooting about the RS 232 There are some troubleshootings when you meet problems on the RS 232 communication e Check that the M3500A and your computer are configured for the same baud rate parity and number of data bits Confirm that your PC is set up for 1 start bit and 2 stop bits The values are fixed on the DMM Check that the interface cable and adapters have been connectd correctly even the DB 9 Cable type straight or crossover type Check that the interface cable has been connected to the correct serial port on your PC 2 etc 116 5 1 Pass Fail Output via USB Connector The USB connector which comforns to USBTMC protocol on the rear panel of M3500A 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 transmitted via the USB port 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 sec for e
136. rs 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 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 mix 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 ON or 1 When you query a boolean setting the instrument will always return O or 1 The following command uses a boolean parameter 144 INPut IMPedance AUTO OFF ON String Parameters String parameters can contain virtually any set of ASCII characters A string mus
137. sult to the output buffer MEASure VOLTage DC range MIN MAX DEF3 4 resolution VOLTage DC RATio range MIN MAX DEF 7 4 resolution MIN MAX DEF VOLTage AC lt gt MIN MAX DEF 4 resolution MIN DEF CURRent DC lt range lt resolution CURRent AC lt lt gt lt resolution MIN MAX DEF RESistance range resolution MIN MAX DEF FRESistance lt lt gt lt resolution FREQuency range MIN MAX DEF3 4 resolution MIN MAX DEF 119 PERiod range resolution 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 range resolution MIN MAX DEF VOLTage DC RATio range MIN MAX DEF 3 4 resolution MIN MAX DEF VOLTage AC 4 lt gt resolution
138. t buttons to locate DISPLAY submenu Press ENTER to select it and then find ON 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 26 Procedures MENU SYSTEM DISPLAY ON OFF MENU lt PREV NEXT gt SI ENTER Figure 4 26 Remote Interface Operation 95 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 quoted string displays the string you type in DISPlay TEXT CLEar clears the message displayed 4 4 2 Beeper M3500A 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 a new minimum or maximum is found in Min Max operation a stable reading is detected and held the test voltage is within the limits in diode testing the source signal fails the limit testing After the
139. t all ranges is allowable except the range 750 VAC 7 The Specifications are under the test conditions 6 1 2 digits and 2 hour warm up slow AC filter 3 Hz Bandwidth sine wave input s Measurement over 20 at all ranges is allowable except the range 750 VAC The Specifications are under the test condition sine wave input 5 of range When the inputs are within 1 to 5 of range and lt 50 KHz the error 0 19 o of range must be added For inputs within 50 KHz to 100 KHz the 0 13 of range must be added 136 20 50K 0 12 0 05 50K 100K 0 60 0 08 100K 300K 4 00 0 50 3 5 1 00 0 03 5 10 0 35 4 0 03 1 0 uV 1 000000V 10 20K 0 06 0 03 To To I 20 50K 0 12 0 05 imV 50K 100 19 0 60 0 08 100K 300K 4 00 0 50 3 5 1 00 0 04 1 000000A 1uA 5 10 0 30 0 04 ACI 10 5K 0 10 0 04 AC TRMS Current 3 5 1 10 0 06 3 00000A 10 uA 5 10 0 35 0 06 10 5K 0 15 0 06 10 The ACV range 750V is limited by 100 KHz 139 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 0 C to 40 C Operating Humidity Maximum relative humidity 80 for temperature up to 31 Decreasing linearly to 50 percent relative humidity at 40 Storage
140. t 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 quoted string 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 80 ASCII character string SD DDDDDDDDESDD nl SD DDDDDDDDESDD nl SD DDDDDDDDESDD cr nl SD DDDDDDDDESDD cr nl S Negative sign or positive sign D Numeric digits E Exponent nl newline character cr carriage return character C 3 The MEASure Command MEASure VOLTage DC lt range MIN resolution MIN MAX DEF Preset and make a dc voltage measurement with the specified range and 145 resolution The reading is sent to the output buffer MEASure VOLTage DC RATio range MIN MAX DEF resolution 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 range MIN MAX DEF 1 resolu
141. t instead of the front panel control 4 Chassis Ground Used for shielding the noise from the nature 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 M3500 opt01 or 3500 09 Option GPIB IEEE488 Connection RS 232 Connects a remote computer with an IEEE488 cable or with a DB 9 cable for changing operation environment instead of the front panel control Model M3500 opt04 M3500 opt06 33 3 Basic Measurement Function This chapter introduces some basic measurement functions M3500A You will learn how to use your M3500A 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 M3500A 100 1V 10V 100V and 1000V For AC voltage measurements the ranges are 100mV to 750V AC Coupled TRMS 1000V peak Figures 3 1 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 person
142. t it Again use lt and b to locate REVISION option Press ENTER to select it The multimeter gives three numbers in 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 NM lt PREV NEXT gt 206 298 ENTER Figure 4 36 4 4 11 Calibration Information M3500A 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 4 and Press ENTER to select it Use lt and to switch from the last calibrated date and the next calibration date 109 a SERE NEXT gt T P ENTER O VY Ww I i Figure 4 37 For more calibration procedure information please contact your local distributor 4 4 12 Self Test Self test procedures are built in M3500A for checking that the logic and measurement hardware are functioning properly Every time
143. t out FIFO order and it records up to 20 errors in the error queue The first error 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 4 and to locate SYSTEM submenu Press ENTER to select it Again use 4 and 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 MENU C lt PREV m NEXT gt Figure 4 35 4 4 10 Firmware Revision M3500A has three microprocessors for various internal systems You can query the multimeter to determine which revision of firmware is installed 108 for each microprocessor How to check the firmware revision Press MENU and then use lt and to locate SYSTEM submenu Press ENTER to selec
144. t to local mode stat viWrite sesn system local 12 ret If stat VI SUCCESS Then MsgBox System command error system local vbExclamation M3500 multimeter device test stat viClose fList Exit Sub End If stat viClose sesn stat viClose fList stat viClose dfltRM Fori 0 To 5 1 print out the 4 times samples reading Debug Print Rdgs Mid readin i 16 1 15 Next MsgBox End of Job End Sub DEVQUERY Sample Application This C sample application is a Win32 console application It illustrates how to use the PICOTEST 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 C 3 THE DEVQUERY FUNCTION 183 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 Visual C project z include stdio h include windows h void main int argc char argv i TODO Add your control notification handler code here HINSTA
145. the Status Byte The conditions from other status registers will be reported by the status byte summary register The query data waiting in the multimeter s output buffer is reported immediatedly through the message available in bit 4 Besides bits are not latched in the summary registers In addition to clear an event register will clear the according bits in the status byte summary register And to read all messages in the output buffer including all pending queries will clear the message available bit The following list shows the definition of each bit 164 Decimal Bit Definition Value Not Used 1 Set to 0 Not Used 2 Set to 0 Not Used 4 Set to 0 Questionable Data 8 to be enabled in enable register Message Available 16 Data in the DMM s output buffer is available One or more bits are set in the Standard Event Register Bits have to Standard Event 32 be enabled in enable register Request Service 64 The DMM is requiring service Serial Poll Not Used 128 Set to 0 On the other hand there are some conditions that you have to note The following conditions will clear the summary register You execute a CLS clear status command e To query the standard event and questionable data registers will clear only the separate bits in the summary register The following conditions will clear the enable register You turn on the power and have set the DMM p
146. the product to PICOTEST service department if necessary 1 6 Symbols and Terms en symbol indicates hazards that may cause damages to the instrument or even result in personal injury This symbol indicates high voltage be present Use extra caution before taking any action ds This symbol indicates the frame or chassis terminal presented need to be connected to the actual earth ground 10 5 This symbol indicates Protective Conductor Terminal This symbol indicates earth ground terminal 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 A Note Full M3500A specifications are included in Appendix A 1 7 Inspection Your product package is supplied with the following items e One M3500A Multimeter unit 224mm x 113mm x 373mm 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 Refer to the section 1 8 Accessories 1 The M3500A 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 Material Probe Body Outer Insulation Santoprene Rubber 11 Banana Plug Body Brass Nickel Plated Spring Beryllium
147. 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 Wed NNSS 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 Figure 2 8 21 Step 4 Remove 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 2294 ROSY 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 POWER OFF Step 8 After finishing the above procedures you can plug in your power cord as shown in Figure 2 13 N W W Figure 2 13 23 Step 9 Press on the power switch on the front panel for activating M3500A as shown in Figure 2 14 g
148. tio 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 defined 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 Instructs the multimeter to make measurements continuously STORE Stores a specified number of subsequent readings RECALL Displays stored readings and buffer statistics Use lt 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 4 Scrolls through buffer conceals or reveals the di
149. tion 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 digits Therefore the resolution parameter only affects the front panel display MEASure CURRent DC range MIN MAX DEF resolution MIN 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 1 range MIN MAX DEF 4 resolution 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 AC measurement resolution is fixed at 6 digits Therefore the resolution parameter only affects the front panel display MEASure RESistance range MIN MAX DEF 1 resolution MIN DEF Preset and make a 2 wire O measurement with the specified range and resolution The reading is sent to the output buffer MEASure FRESistance range MIN MAX resolution MIN MAX DEF Preset and make a 4 wire O measurement with the specified range and resolution The reading is sent to the output buffer MEASure FREQuency range MIN MAX DEF 1 resolution MIN MAX DEF Preset and make a frequency measurement with the specified range and resolution The reading is sent to the output buffer For frequency
150. tions 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 Zero The purpose of Auto Zero function is used for minimizing the offset influence on your measurements When Auto Zero is enabled M3500A takes the input signal reading as a base value and then internally disconnects the input signal and takes an offset reading a null offset It then subtracts the offset from the base to get an accurate measurement Displayed reading Base value input signal Offset value When the Auto Zero is enabled the meter takes an offset reading for each subsequent measurement However when Auto Zero is disabled the meter only takes one offset reading each time when you change the function settings 51 Defaults The default settings for Auto Zero are enabled The user selected values for Auto Zero are stored in a volatile memory and the default settings will be restored when the meter is power off How to set Auto Zero You can change the Auto Zero setting through the front panel or through the remote interface operation Front Panel Operation The following steps show how to set Auto Zero directly through the fr
151. tons to select the desired range 6 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 PICOTEST M3500A Q2 Resistance Under Test Note Source current flows from the INPUT HI to INPUT LO terminals Figure 3 6 PICOTEST M3500A 04 Resistance Under Test Note Source current flows from the INPUT HI to INPUT LO terminals Figure 3 7 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 1 PICOTEST M3500A Rear Panel N 2 wire resistance measurement Figure 3 8 39 PICOTEST M3500A Rear Panel 4 wire resistance measurement Figure 3 9 3 4 Frequency amp Period Measurements M3500A uses an on board counter with 25MHz to measure the frequency period The measurement band is from 3Hz to 300kHz or 333 ms to 3 3 us and the measurement voltages range from 100mV 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
152. ved a READ Command while in the local mode 135 Appendix This appendix contains the performance specifications of the M3500A 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 M3500A unless noted otherwise A Specification List DC Characteristics Accuracy 96 of reading of range Input 1 Year Function Range Resolution Resistance 23 C 5 C 100 0000 mV 0 1 uV gt 1069 0 0050 0 0035 1 000000 1 0 gt 1060 0 0040 0 0007 DC Voltage 10 00000 V 10 uV gt 1060 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 The specifications are under the conditions 6 1 2 digits and 2 hour warm up 2 Measurement over 20 at all ranges is allowable except the range 1000 VDC and 3 A 3 a Use continuous integrating A D converter b Input bias current less than 30 pA at 25 C c Input protection 1000 V at all ranges 136 Shunt 1 Year Function Range Resolution Resistance 23 5 10 00000 10 nA 5 10 0 05
153. viWrite usb m instr usbtmc unsigned char pStrout 6 amp nWritten Sleep 30 if status VI SUCCESS 1 MessageBox NULL Write to device error M3500 multimeter device test MB OK PviClose usb m defaultRM usbtmc hUSBTMCLIB NULL m defaultRM usbtmc 0 return else printf output IDN n Sleep 1000 Read data from device len 64 188 if RUSBTMCLIB 1 status PviRead usb m instr usbtmc pStrin len amp nRead if nRead gt 0 x for len 0 len long nRead len 1 buffer len pStrin len buffer nRead 0 printf input s n n buffer Set sample count to 1 strcpy pStrout SAMP COUN 1 status PviWrite usb m instr usbtmc unsigned char pStrout 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 amp nWritten Sleep 3000 Set configure frequency range Auto strcpy pStrout CONF FREQ status PviWrite usb m instr usbtmc unsigned char pStrout 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 amp nWritten Sleep 3000 189 12 22 10 20 Fetch the M3500 measure value screen value Set Voltage DC measure strcpy p
154. 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 enable value 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 171 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 11 SCPI Compliance Information This section encloses a list of commands that are device specific to the M3500A Although not included the 1999 0 version of the SCPI standard these commands are compliant to the SCPI format and they follow the syntax rules of the standard Many of the required SCPI commands are accepted by the multimeter but aren t 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 COUNt lt gt gt COUNt MINimum MAXimum SENSe FUNCtion CONTinuity FUNCtion DIODe FREQuency VOLTage RANGe range MINimum MAXimumj FREQuency
155. x display as shown on Figure 4 25 You have 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 you PC terminal ADRS MAN TRIG HOLD MEM RATIO MATH FLT 4W EXT LLLI ene eee HH 2 AUTO 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 94 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 You can send a message through the remote interface from your PC terminal to the lower row display and will substitute the original display Default The display default is ON The On Off selected by you 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 Press MENU button then use lt and buttons to locate SYSTEM submenu Press ENTER to select it and then again use 4 and g
156. x 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 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 NULL OFFSet value 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 Set the lower 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 LOWer Query the lower limit for the limit testing 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 t
157. y 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 new line character The IEEE 488 EOI end or identify message is interpreted as a new line character and can be used to terminate a command string in place of a new line character A carriage return followed by a new line is also accepted Command string termination will always reset the current SCPI command path to the root level 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 143 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 paramete
158. y factors as you wish The default factors used are listed in Table 4 3 Table 4 3 Type Alpha Beta Delta R zero PT100 0 003850 0 10863 1 49990 1000 D100 0 003920 0 10630 1 49710 1000 F100 0 003900 0 11000 1 49589 1000 385 0 003850 0 11100 1 50700 1000 3916 0 003916 0 11600 1 50594 1000 NTCT 0 003850 0 10863 1 49990 1000 Here is the temperature equation that is used to determine the RTD temperature When t lt 0C R R l Br Ct t 100 When 0 C 1 630 C 65 R R 1 At A 41 T Z 100 B a 10 aB 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 units and

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