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M191 Insulation Tester Calibrator

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1. GQ and push ENTER button or rotary button to confirm The sequence of parameters t1 t2 t3 and RO R1 R2 R3 must meet following requirements e Maximum value of time interval t1 t2 t3 is lower than 9999 s Minimum time period value is 1 s Range of RO R2 R3values is within 10 MQ and 100 GO Note When setting time period and ENTER button or rotary button is pushed two times time period value is set to OFF position In OFF position the step is ignored during execution the sequence When setting resistance value and ENTER button or rotary button is pushed two times resistance is set to minimal value 10 When requested parameters are set up push the OUTPUT ON button Calibrator connects first resistance value RO to the output terminals and it is waiting for test voltage from UUT The test voltage must be higher than 100 VDC to start the RUNNING sequence Push START button on UUT Calibrator recognizes level of active test voltage and executes the preset time sequence procedure When the procedure is at the end calibrator stays in RUNNING mode until the output terminals are disconnected using OUTPUT ON OFF button Real resistance connected to the output terminals during RUNNING mode is indicated by double arrows and by backlighting the step which the calibrator is currently in Fig 14 RUNNING mode User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator 5 Setup menu The M191
2. and is used to separate several alternative parameters Semicolon is used to separate more commands written on one line E g 10E 6 OUTP ON Note Each command must end in cr or If Both codes lt crlf gt can be used at the same time The calibrator performs all commands written on one line of the program after it receives cr If or lt crlf gt code Without this code the program line is ignored Description of Abbreviations Abbreviation Description Decimal Numeric Program Data This format is used to express decimal lt gt number with or without the exponent Character Program Data Usually it represents a group of alternative character lt CPD gt parameters E g ON OFF 0 1 A flag indicating a request for the value of the parameter specified by the 2 command parameter other than the question mark can be used A flag indicating a request for the parameter specified by the command This command permits a value to set well as used request cr Carriage return ASCII code 13 This code executes the program line lt gt Line feed ASCII code 10 This code executes program line Tab IX Abbreviation description SCPI OUTPut Command Summary Command Description OUTPut STATe Returns the state of the output terminals OUTPut STATe ON OFF Activates or deactivates output terminals Tab X SC
3. This command prevents the Calibrator from executing any further commands or queries until all previous remote commands have been executed This command resets the Calibrator to its initial state This command launches an internal self test and returns the self test results 0 pass or 1 fail This query command returns a number representing the STB register contents The STB register carries the MSS bit status This command sets the Service Request Enable register Since bit 6 is User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator SRE Description ESR Description ESE value Description ESE Description CLS Description User Manual v20 not used the maximum value is 191 This query command returns the Service Request Enable number This query command returns the contents of the Event Status Register and clears the register This command programs the Event Status Enable register bits Parameter value is a number in the range of 0 255 This query command returns the value in the Event Status Enable register This command clears the Event Status Register and the Status Byte Register with the exception of the MAV bit and output queue The output line is not reset 51 M191 Insulation Tester Calibrator MEATEST s r o 9 4 Standard Status Data Structures All status registers are defined by the IEEE 488 2 standard The programmer has ac
4. User Manual v20 10 50 100 nF fix values 10 0 3 200 pF 0 to 5 000 kV DC with suppressed indication bellow 50 VDC 0 5 10 V 15 minutes 23 10 C Relative humidity 70 23 2 Relative humidity lt 50 for resistance range from 10 to 1 000 Relative humidity lt 70 for resistance range from 10 to 10 GO Add 0 1 x specified accuracy C at reference temperature for temperature outside of reference temperature 23 2 C from 13 C to 33 C Add 0 15 x specified accuracy RH for range 10 00 to 1 000 0 0 05 x specified accuracy RH for range 100 0 to 9 99 60 0 02 x specified accuracy RH for range 10 00 kQ to 99 99 GQ for ambient humidity in range 50 to 70 RH 10 C to 55 450 W x 430 D x 150 mm 12 kg 110 115 120 125 220 230 V 50 60 Hz 40 VA I according to EN 1010 1 T500mL250V for 230 VAC power supply voltage 1 pc T1L250V for 115 VAC power supply voltage 1 pc 57 M191 Insulation Tester Calibrator MEATEST s r o 13 Accessory Basic accessories included in delivery Power line cord User s manual Test report Spare fuse Opt 191 10 Test cable 1000V 20A black Opt 191 11 Test cable 5000V 20A red Opt 191 12 Green yellow grounding lead banana banana Cable RS 232 Options extra ordered e Opt 191 10 Test cable 1000V 20A black Opt 191 11 Test cable 5000V 20A red Opt 191 12 Green yellow groun
5. 81 2 digit multimeter Agilent 3458A or pA meter Keithley 2635A or similar with DC current range 100 to 10 RLC meter Agilent 4263A Agilent 4278A or other with accuracy 0 1 90 Multifunction calibrator Meatest M 140 M142 Fluke 5500A or similar with DC voltage range to 1000 V Process calibrator Burster 4423 Fluke 745A or similar with DC current range to 10 mA and accuracy better than 0 146 DC High voltage source Heinzinger PNC 10000 or similar with output voltage accuracy 0 2 Configuration of the calibrator Calibrator should be tested directly from the front panel terminals Performance verification may be performed after warm up period i e 15 minutes after switching on Calibrator have to be in temperature stabilize condition at minimum 8 hours before performance verification test is started Basic steps of the performance verification test Verification procedure consists of following steps High resistance decade resistors in range from 10 to DC voltage in ranges to 10 kV DC current in range to 5 mA e Capacitance test in points 10n 50n 100nF Procedure Following part describes procedure of performance verification test Recommended test points including applied method specification and allowed limits are shown in table Tab V Resistance verification 1 Connect the calibrator to the mains and let them switched on for at least one 15minutes in a laboratory at 23 1 C 2 Conn
6. DPP CPI Returns the value of the cPI SOURce DPP CPR lt DNPD gt Description Parameters User Manual v20 This command sets coefficient for parameter PR in DPP mode lt DNPD gt Number without unit 47 M191 Insulation Tester Calibrator MEATEST s r o Example DPP CPR 5 853 cPR in DPP mode is set to 5 853 Query DPP CPR Returns the value of the cPR SOURce DPP ROUT Description Returns the actual output resistance in the DPP mode Query DPP ROUT Returns the value of the actual output resistance SOURce DPP RCO Description Returns the counted resistance value RO coefficient for the DPP mode Query DPP ROUT Returns the value of the actual output resistance SOURce DPP VOLT Description This command returns the measured voltage on the output terminals Query DPP VOLT SOURce DPP TOT Description This Returns the measured total time Query DPP TOT Using SYSTem Commands The SYSTEM commands are used to read and control miscellaneous Calibrator functions Table X gives a summary of the Calibrator s S YSTem commands SYSTem ERR Description This command queries the Calibrator s error queue to retrieve the first error in the queue The error queue stores errors as first in first out FIFO The error is deleted after being read The earliest errors remain in the queue while the most recent error is discarded Query SYST ERR Returns first error in the er
7. but also calibration of test voltage generated by UUT testing of short current verifying of functions of measuring dielectric parameters like polarization index PI dielectric absorption ratio DAR and polarization ratio PR The calibrator enables also verification of timer function of UUTs Basic feature of the calibrator is adjustable high resistance decade in summary range from 10 to 1 TQ The decade is designed for operation voltages up to 10 kV In this range it offers basic accuracy 0 1 to 5 depending on set resistance value The calibration can be controlled manually using front panel keypad or in remote mode using one of two types of interfaces GPIB RS 232 The calibrator can easily fit within calibration systems featuring CALIBER software support User Manual v20 5 M191 Insulation Tester Calibrator MEATEST s r o 2 Preparation for operation 2 1 Inspecting package contents selecting the installation location Basic package includes the following items e Insulation tester calibrator Power cord e Operation manual gt Test report gt Test cable 5000V 20A red 1 pc Test cable 600V 19A black 1 pc Green yellow grounding lead 1 pc 5232 cable e Spare fuse T500L250 1 pc e Spare fuse T1L250 1 pc Calibrator is packed in doubled cartoon with PE sack The sack contains silica gel bags to avoid moisture influence during transport and stocking Leave the cartoon with the calibrato
8. 0 GQ the test voltage is not measured Sign n a is displayed instead of reading in the display line Calibrator measures continuously test voltage even when output terminals are OFF Reading of the test voltage has suppressed zero in band 50 VDC The internal voltmeter has one range 10 kV Test current Calibrator calculates and displays test current Test current value is calculated according to formula Itest Utest R where is set resistance value and Utest is measured test voltage User Manual v20 15 M191 Insulation Tester Calibrator MEATEST s r o Test current is displayed only when output terminals are ON Test current is not displayed when set resistance is higher than 300 0 GQ Accuracy Calibrator displays accuracy of selected resistance point in 96 Operating procedure A Connect UUT to the output terminals Use only test leads with guaranteed isolation according to test voltage range of UUT Use test leads delivered with UUT whenever it is possible B Select HVR mode pushing repeatedly FUNCTION UP or FUNCTION DOWN button until HVR label appears on the display C Enter requested resistance value using either numerical keyboard or rotary button Confirm the value by pushing the appropriate unit button GQ or D Connect output terminals of the M191 ON by pushing the button OUTPUT ON Green LED starts to light M191 starts to measure test voltage and current E Select requested t
9. DM HVM R30 270M 0 01 M DM HVM R31 560M 0 02 M DM HVM R32 1G 0 05 M DM HVM R33 1G8 0 05 M DM HVM R34 2G7 0 05 M DM HVM R35 5G6 0 05 M DM HVM R36 10G 0 05 M DM HVM R37 18G 0 05 M DM HVM R38 33G 0 1 1000 V VAM R39 50G 0 1 1 000 V VAM R40 100G 0 1 1 000 V VAM R41 170G 0 2 1 000 V VAM R42 250G 0 2 1 000 V VAM R43 500G 0 5 1 000 V VAM R44 IT 0 5 1000 V VAM R45 3k 0 01 M DM Tab III List of calibration points Mis DC test voltage of standard multimeter Test voltage should not exceed 50 VDC for values bellow 100 kOhm User Manual v20 29 M191 Insulation Tester Calibrator MEATEST s r o Voltage current and capacitance function Calibration Index Meaning Calibration point Requested accuracy Test method vo0 Zero range 10 kV 0 0 VDC 0 2 V DM PC VOI Slope range 10 kV 5000 VDC 10 V DM PC 100 Zero range 5mA 0 000 mA 5uA DM PC 101 Slope range 5mA 5 000 mA 10uA DM PC C00 10 nF capacitor 10 000 nF 20 pF RCL Col 50 nF capacitor 50 000 nF 100 pF RCL C02 100nF capacitor 100 00 nF 200 pF RCL Tab IV List of calibration points DM direct measurement using standard multimeter two wire connection DC test voltage is given by standard multimeter for positions ROO to R37 DM HVM direct measurement using standard multimeter two wire connection high voltage mode VAM Volt amper method using multifunction calibrator and uA meter DM PC direct measurement usi
10. Insulation Tester Calibrator OFF In OFF mode the output terminals are disconnected Both type of requested parameter nominal resistance and parameter index can be set STANDBY When OUTPUT ON button is pushed calibrator goes over to STANDBY mode In this mode is waiting for test voltage from UUT to start simulation sequence When presence of the test voltage is recognized calibrator goes over to RUNNING mode RUNNING Calibrator simulation sequence has been launched Calibrator switches the setup resistances to the output terminals in preset time intervals When the sequence is finished calibrator stays in RUNNING mode until the output terminals are disconnected using OUTPUT ON OFF button During running mode currently applied test voltage and total elapsed time are displayed In DPP mode the display shows information as follows OFF submode Fig 11 Programming the mode Following parameters can be entered PARAMETER field One defined parameters DAR PR PI can be selected RO parameter This is the resistance which is connected to the output terminals in STANDBY mode The parameter range is from 10 MQ to 100 GQ DAR PR PI coefficient Requested value of the coefficient which is asked to simulate can be entered Range of the value is from 0 5 to 99 9 From the entered coefficient and RO nominal resistance calibrator calculates resistance level which will be connected during RUNNING mode to the output terminals Foll
11. auxiliary connector on the front panel CME Command Error bit 5 This event bit indicates that an incorrectly formed command or query has been detected by the M140 EXE Execution Error bit 4 This event bit indicates that the received command cannot be executed owing to the device state or the command parameter being out of bounds DDE Device Dependent Error bit 3 This event bit indicates that an error has occurred which is neither a Command Error a Query Error nor an Execution Error A Device specific Error is any executed device operation that did not properly complete due to some condition such as overload QYE Query Error bit 2 This event bit indicates that either l an attempt is being made to read data from the Output Queue when no output is either present or pending 2 or data in the Output Queue has been lost User Manual v20 53 M191 Insulation Tester Calibrator MEATEST s r o OPC Operation Complete bit 0 This event bit is generated in response to the OPC command It indicates that the device has completed all selected pending operations ESE Event Status Enable Register The Event Status Enable Register allows one or more events in the Event Status Register to be reflected in the ESB summary message bit This register is defined for 8 bits each corresponding to the bits in the Event Status Register The Event Status Enable Register is read with the common query ESE Data is returned as a binary weighted va
12. calibration a Make short terminal between H and L terminals Select position 100 from the list of calibration points b Live readings in bits of the calibrator built in mA meter can be seen in right column Push the rotary button or ENTER button to save new calibration value c Disconnect short wire and connect output of process calibrator Set DC current 5 mA on it d Switch on the process calibrator output terminals Live readings in bits can be seen on M191 calibrator right column Push the rotary button or ENTER button to save new calibration value e Switch off the process calibrator output terminals Disconnect the terminals 8 Capacitance calibration a Connect to the H L terminals standard RCL meter Select test frequency 100 Hz b Select calibration point C00 Measure the capacitor write down the value and confirm with ENTER or rotary button c Continue in calibration of next capacitance segments C01 C02 Use the same system as in previous step d Disconnect the terminals 9 Push the SETUP button to exit the calibration mode Calibration has been performed 32 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator 7 Verification procedure Procedure recommended for verifying parameters of the calibrator is described in this chapter Required equipment Following instruments are required for calibration 81 2 digit multimeter type Fluke 8508A or similar with 0 01 90 accuracy and range to 20 GQ
13. ccccccssssssssscssssccsssssssssssssesessees 14 44 High resistance source Mode cscssssccssssccsssscsssscssssccsssssssssssssescsscascsssssssssssssaceseses 15 4 5 TIMER Timer function s ccccsscesccssscsscesescesacssscsosasessssesessscssecassosssosisoesenesieceienscsbteses vscsonssoaseses 16 4 6 SHORT Short current Mode cccccssccsssscsscsscssccsscescssssssssssesscsscssssssesssssseseesesssseseeeees 18 4 7 High voltage capacitance eeeeee sees sees seen ee tna etant teet 19 4 8 DPP Dielectric and polarization parameters eeeeee ceres eee eite eren ette ette stet ta seta sena 20 4 9 PSP Programmable simulation of polarization absorption ee eere 22 5 Setup Cc 25 6 Calibration mode ue e ls xi D Dd RE Met ie uei sc e nio Heu TuS 26 7 Verification NEQUE 33 8 EFSFOFHOSSUDES ih As AEAEE ST 37 9 Calibrator HOlHteiillee 38 JU UA ete e ret 40 9 1 IEEE 488 bus properties s eemper oo eso eene eo to r eoo een rao reo Peer eere aoa Po aee nore ae top Fe oe ruE eS 40 9 2 RS232 p s RR 40 9 37 COMMANA SYNAN dE E Sisi rnt oas 41 9 4
14. displayed L output terminal is internally connected to the protection earth PE wire in power line socket When parameter is OFF L output terminal is floating Change of the parameter can be performed in SETUP menu Note Maximum DC voltage between L terminal and GND terminal is 20 VDC Exceeding the limit can cause damage of the calibrator c Remote local mode of control C Test signal field Measured value of current test voltage resp current is displayed in the field D Mode indication field The selected function label is displayed One of following functions can be selected using FUNCTION UP or FUNCTION DOWN buttons a HVR High resistance source b TIMER Timer function of UUT testing c SHORT Short current of UUT measuring d HVC High voltage capacitance e PSP Programmable simulation of polarization absorption parameters f DPP Dielectric and polarization parameters simulator E Accuracy field Actual accuracy of the main parameter is shown in the field 2 Rotary button The rotary button enables setting of nominal resistance value By pushing the knob position marks are displayed By turning the knob to the left or right resistance value can be fluently changed up or down The central button is used to change between active mark positioning and resistance value setting 3 Numeric keyboard The keyboard allows the entry of numeric values on the display The central button of the rotary button or ENTER button is used t
15. displays the symbols after the entry is complete the value is displayed on the monitor line press ENTER button or one of quantity buttons KO MQ GO TQ e the value is copied to the main display and the monitor line disappears Entry of the value using the potentiometer press the potentiometer knob The display now includes cursor marks which point to the active digit e turn the knob to change the active digit press the potentiometer knob to change to the mode which allows to change the value of the active digit and symbols are displayed above the active digit Active digit can be changed by turning the knob turn the knob to change back to the mode which allows to change the position of the active digit to get to default screen keep pressing the center cursor button until there is under any value or press EXIT button All values can be set using the buttons or the potentiometer 4 3 Connection disconnection of the output terminals After switching on the output terminals are disconnected in all modes Press the OUTPUT button to connect the output signal to the terminals Green LED above the OUTPUT button is lit and the information field on the display shows the following mm symbol 14 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator Press the OUTPUT button again to disconnect the output terminals Green LED goes off and the information field o
16. standard ohmmeter should be applied Input resistance of internal mA meter is approx 2 5 k 2 Standard current source with compliance voltage min 15V has to be applied Calibration points Each function of the calibrator has assigned fixed calibration points which have to be set during the calibration List of calibration points includes e Single resistance segments in summary range from 3 to ITO ROO to R45 e Single capacitors 10 50 100 nF C00 to C02 DC voltage 5000 V V00 and 1 DC current 5 mA 100 and 101 28 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator Resistance function Calibration Resistance segment nominal Recommended test Test method Requested accuracy Index value voltage Q V 3k 0 05 M DM ROI 3k 0 05 M DM R02 3k 0 05 M DM R03 3k 0 05 M DM R04 3k 0 05 M DM R05 3k 0 05 M DM R06 3k 0 05 M DM R07 3k 0 1 M DM R08 4k 0 1 M DM R09 5k 0 1 M DM R10 6k 0 1 M DM 9k 0 1 M DM R12 10k 0 01 M DM R13 20k 0 01 M DM R14 40k 0 01 M DM R15 50k 0 01 M DM R16 100k 0 01 M DM R17 200k 0 01 M DM R18 400k 0 01 M DM R19 500k 0 01 M DM R20 1M 0 01 M DM R21 2M 0 01 M DM R22 4M 0 01 M DM R23 5M 0 01 M DM R24 10M 0 01 M DM HVM R25 20M 0 01 M DM HVM R26 40M 0 01 M DM HVM R27 50M 0 01 M DM HVM R28 100M 0 01 M DM HVM R29 180M 0 01 M
17. test voltages 4 6 SHORT Short current mode Short current mode SHORT is designed to enable verification of short current capability of UUTs megaohmmeters M191 measures DC test current sourced by UUT under short circuit condition M191 milliampermeter has one range 5 mA with five digit resolution in this mode Nominal input resistance is 2 5 kQ Display shows information as follows Fig9 SHORT mode Measured short current in mA Accuracy of the measured value in Operating procedure A Connect UUT to the output terminals Use only test leads with guaranteed isolation according to test voltage range of UUT Use test leads delivered with UUT whenever it is possible B Select SHORT mode pushing repeatedly FUNCTION UP or FUNCTION DOWN button until SHORT label appears on the display C Connect output terminals of the M191 ON by pushing the button OUTPUT ON Green LED starts to light M191 starts to measure short current Select requested test voltage level in UUT Select resistance range in UUT if necessary Activate UUT measurement typically by pushing ON button on the UUT UUT starts to source DC current M191 calibrator measures the short current and displays it Compare M191 reading to UUT specification m omm gg Switch the UUT output OFF to remove test voltage from the output terminals Disconnect M191 output terminals using the button OUTPUT ON 18 User Manual v20 MEATEST s r o M191 Insula
18. type can be selected The calibrator can be remotely controlled only using the selected interface 8 RS232 baud rate xx UP DOWN Indicates the communication speed of RS232 bus UP DOWN display buttons can be used to select 9600 19200 28800 38400 57600 115200 Perfect communication with the PC requires equal values set at the PC and the calibrator 9 GPIB address xx UP DOWN Displays the calibrator s address at the GPIB bus UP DOWN display buttons can be used to select any valid GBIP address in the range of 00 to 30 The address 24 is set by the manufacturer 10 CPU firmware XXXXXX CPU block firmware version The parameter cannot be changed 11 LVR firmware XXXXXX LVR block firmware version The parameter cannot be changed 6 Calibration mode The M191 calibrator includes a calibration procedure which allows calibration of the calibrator Partial resistors of the internal serial resistance decade and calibration points of internal meters can be readjusted during the calibration in predefined order The calibration can be controlled using the buttons and menu on the calibrator Calibration principles The calibrator can be calibrated completely i e all functions are calibrated in all recommended points partially i e only selected functions are calibrated in all recommended points partially i e only selected functions are calibrated in selected points 26 User Manual v20 MEATEST s r o M191 I
19. types The manufacturer is not liable for the damage caused by modification of the construction or replacement of parts with non original ones User Manual v20 7 M191 Insulation Tester Calibrator MEATEST s r o Safety symbols used on the equipment Important information See manual Danger high voltage Earth ground Warning risk of electric shock Hazardous voltage Voltage 30 V DC or AC peak might be present User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator 3 Description of controls 3 1 Front panel The front panel of the calibrator includes a LCD display control buttons and output terminals The following picture shows the control part of the front panel LLLI Front panel 1 Display LCD display shows all information provided by the calibrator e g set parameters of the signal error messages setup information The display is divided to several information sections Fig3 Display User Manual v20 9 M191 Insulation Tester Calibrator MEATEST s r o A Main field It displays main parameter and limitation for applied test voltage depending on selected function B Information field It shows status of some parameters a Output terminals status When OFF sign is displayed the output terminals are disconnected When sign is displays output terminals are connected b Grounding of L output terminal When parameter ON is
20. 0 01 Q 20 02MQ 40 04MQ DMHVM osa 200 2MQ 400 4MQ 801 6 Q k 0M 3 996MQ 4 000MQ Fluke 8508A lt 250V Fluke 8508A lt 250V 100M Fluke 8508A lt 2507 100 Fluke 8508A lt 250V G DM DMEM H H lt lt lt lt lt lt lt lt lt lt lt lt lt lt 88 0 M M 100MQ 100MQ Fluke 8508A lt 2507 200MQ Fluke 8508A lt 250V 400 Fluke 8508A lt 250V DM HV 1G G lt wn z lt lt lt H H lt DM HY 100 DM AV 1 00560 260 DM AV 201060 01000 1060 DM HVM 9 95GQ 10 0560 R 100GQ 20GQ Multifunction 1000V 19 8GQ 20 260 calibrator M140 multimeter HP3458A 100GQ 4060 Multifunction 1000V 39 660 40 460 calibrator M140 multimeter HP3458A VR 100GQ 8000 Multifunction 1000V 79 200 80 860 calibrator M140 multimeter HP3458A HVR 100GQ 100GQ Multifunction 1000V M 98 0GQ 102 0GQ calibrator M140 multimeter HP3458A ITQ 200GQ DC High voltage 5000V M 196 0GQ 204 0GQ source multimeter HP3458A ITQ 500GQ DC High voltage 5000V M 47560 52560 source multimeter HP3458A 10MQ 10MQ DC High voltage 5000V VAM 9 99MQ 10 01MQ source multimeter HP3458A HVR 100MQ DC High voltage VAM 999 1001 H lt lt R R R H Z lt lt lt lt x lt lt A
21. 0 mA DC Input resistance 2 700 Q nom Short test current accuracy 0 2 5uA 3 Function TIMER Range of the timer 5sto9 999 5 Timer accuracy 0 3 0 0001 t s where t is elapsed time Threshold voltage 100 VDC Maximum test voltage 10 000 VDC 5 over range Output resistance 100 MO Test voltage indication 0 to 10 000 kV DC with suppressed indication bellow 50 VDC Test voltage accuracy 0 5 10 V Max test voltage hold function to 11 kV DC 56 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator 4 Function PSP Programmable simulation of polarization parameters Number of switching positions 4 Applicable resistance range 10 00 MQ to 100 00 GQ Maximum allowed test voltage 3 000 VDC Max period setting 9 999 s 5 Function DPP Dielectric and polarization parameters Applicable resistance range 10 00 MQ to 100 00 GQ Maximum allowed test voltage 3 000 VDC Max period setting Preset parameters 9 999 5 Polarization index PI Dielectric absorption ratio DAR Polarization ratio PR 6 Function HVC High voltage capacitance Range of capacitance Tolerance Calibration value uncertainty Max test voltage Test voltage accuracy General data Warm up time Operating temperatures Reference condition Temperature dependency Humidity dependency Storage temperatures Dimension Weight Power line Power consumption Safety class Used external fuses
22. Enable Fig 18 GPIB connector 9 2 RS232 bus properties To transfer the data using RS232 bus 8N1 data format is used i e each data word includes 8 bits no parity and one stop bit The communication speed can be set using the system menu Available values 9600 19200 28800 38400 57600 and 115200 Bd RS 232 connector layout A Pin Label Direction Note 2 TXD output transmitter g 3 RXD input receiver 5 GND ground Tab VII RS232 connector Fig 19 9 pin connector D SUB MALE Cable between the calibrator and PC configuration 1 1 D Sub 1 D Sub 2 M 140 Receiver Receiver SSCS Tab RS232 cable description 40 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator 9 3 Command syntax The commands described in this chapter can be issued through both buses IEEE 488 and 5232 All commands listed in this chapter are explained in two columns Command and Description Command column includes the name of the command Each command includes one or more keywords If a keyword is in brackets it is not mandatory Non mandatory commands are used only to achieve compatibility with language standard SCPI Capitals designate the abbreviated form of the commands extended form is written in lowercase Command parameters are in brackets lt gt each parameter is separated using a comma Parameters in brackets are not mandatory Line means
23. M 1 9 1 Insulation Tester Calibrator Operation manual MEATEST MEATEST s r o M191 Insulation Tester Calibrator Content 1 Informaltosd esae ie di Ne p a Rar TSE 5 2 Preparation Jor operation eere ek riiv es n seva tpe bones csinensbundeebensdeenensvsventesndeensbes 6 2 1 Inspecting package contents selecting the installation location e cesse 6 2 2 Ambient conditions eere eee eese esee eese on E ess pooo tastes seta sesso seta sees sone enses sens en sees sous 6 PAS MEN Q2 Ire NI 6 2 4 Warm p tlm eee en nee oo eoe ore eae ee he a sk ko v ce en eui va sevens Oven beet ua ee ea eee er Rees 7 2 5 Replacement Of siccsscccccesssstusseettsescscasenescoedssserscscsooossessecceesesssussdessosssoas sea bore eS ean eas ee a vue 7 2 6 Safety precatti NnS RE 7 3 Description gr 9 31 Frontpanel 9 3 25 cii doeessnseoences 12 3 3 UUT Comme ction ______ 13 4 Control of the n SE PK epe Y nah 13 4 1 Selection of function eee eerte eerte __ __ _ _ __ 13 4 2 rate 14 43 Connection disconnection of output terminals
24. MEATEST s r o M191 Insulation Tester Calibrator will clear As a result its summary message will reset to 0 which in turn will clear the ESB bit in the Status Byte Register Bit configuration of Status Byte Register RQS Request Service bit 6 The RQS bit is set to 1 whenever bits ESB change from 0 to 1 and are enabled 1 in the SRE When RQS is 1 the M140 asserts the SRQ control line on the 488 interface You can do a serial poll to read this bit to see if the M140 is the source of an SRQ MSS Master Summary Status bit 6 The MSS bit is set to 1 whenever bits ESB or are 1 and enabled 1 in the SRE This bit can be read using the STB command in serial remote control in place of doing a serial poll ESB Event Summary Bit bit 5 The ESB bit is set to 1 when one or more enabled ESR bits are set to 1 Conversely the ESB bit is set to 0 when no enabled ESR bits are set to 1 Message Available bit 4 The bit is set to 1 whenever data is available in the M140 488 Output Queue This message is used to synchronize information exchange with the controller The controller can for example send a query command to the M140 and then wait for MAV to become TRUE The IEC 625 1 bus is available for other use while an application program is waiting for a device to respond If an application program begins a read operation of the Output Queue without first checking for MAV all system bus activity
25. MQ Query PSP RESO Returns the value of the RO analogy for RI R2 R3 SOURce PSP TTIM lt DNPD gt Description This command sets value of T1 Parameters lt DNPD gt Time value in seconds Example PSP TTIMI 56 T1 in PSP mode is set to 56seconds Query PSP TTIM1 Returns the value of the T1 46 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator analogy for T2 T3 SOURce DPP LEV CPD Description Parameters Example Query This command sets parameter in DPP mode lt CPD gt 0 is DAR parameter 1 is PI parameter 2 is PR parameter DPP 1 Parameter is set to PI in DPP mode DPP Returns the name of the selected parameter SOURce DPP RESO DNPD gt Description Parameters Example Query This command sets RO in DPP mode lt DNPD gt Resistance value in ohms DPP RESO 1 25E 7 in DPP mode is set to 12 5MQ DPP RESO Returns the value of the RO SOURce DPP CDAR lt DNPD gt Description Parameters Example Query This command sets coefficient for parameter DAR in DPP mode lt DNPD gt Number without unit DPP CDAR 5 853 cDA in DPP mode is set to 5 853 DPP CDAR Returns the value of the cDA SOURce DPP CPI DNPD gt Description Parameters Example Query This command sets coefficient for parameter PI in DPP mode lt DNPD gt Number without unit DPP CPI 5 853 cPI in DPP mode is set to 5 853
26. PI Output commands User Manual v20 41 M191 Insulation Tester Calibrator MEATEST s r o SOURce Command Summary Command Description SOURce Path to SOURCE subsystem MODE Returns mode the Calibrator is set to HVResistance Sets Calibrator to HVR mode LEVel lt DNPD gt Sets the resistance value for HVR mode Returns the measured voltage on the open output 2 MOET alge terminals Returns the current flowing through the selected 2 CURRent resistor LEVel Returns the set value for the HVR mode Sets Calibrator to TIM mode LEVel Returns the set value for the Timer mode Returns the measured voltage on the open output 2 VOLTatge terminals SHORt Sets Calibrator to SHORT mode CURRent Returns the current HVCapacitance Sets Calibrator to HVC mode LEVel lt CPD gt Sets the capacitance value for HVC mode Returns the measured voltage on the open output 2 VOLTatge terminals LEVel Returns the set value for the HVC mode PSPolarization Sets Calibrator to Programable simulator of polarization mode TOTaltime Returns the measured total time Returns the measured voltage on the open output VOLTatge terminals RESistance0 lt DNPD gt Sets the resistance value RO for PSP mode RESistance0 Returns the res
27. Push START button on UUT Calibrator recognizes level of active test voltage and executes the preset time sequence procedure When the procedure is at the end calibrator stays in RUNNING mode until the output terminals are disconnected using OUTPUT ON OFF button Be aware that the test voltage for high resistance measurements is dangerous and can cause electric shock Notes Test leads delivered with the calibrator are approved for application up to 5kVDC Use test leads delivered with UUTs for higher test voltages 4 9 PSP Programmable simulation of polarization absorption Programmable simulator of polarization PSP mode offers simple calibration and verification of measurement capability of polarization and absorption parameters in isolation testers The mode is based on programming of time sequence of maximum three various resistances The preset resistances are step by step connected in predefined time intervals to the output terminals UUT recognizes change of resistance and evaluates the change of resistance as polarization absorption parameter PSP mode is programmable mode The resistances connected to the output terminals can be preset in range 1 to 100 and can be switched over in programmable time interval up to 9 999 s Depending on status the PSP mode can be in one of following submodes OFF In OFF state the time sequence can be programmed i e the time points and resistance values which are to be switched to the ou
28. STATe CPD ON OFF 1 0 Description Similar to the front panel s OUTPUT ON OFF key this command will apply or remove resistance or capacitance decade to or from the Calibrator s output terminals Parameters lt gt ON or 1 Output signal applied OFF or 0 Output signal disconnected Query OUTP Returns ON or OFF to indicate application of output signal Using the SOURce Commands Setting up functions that generate an output are controlled through the SOURCE command set Table X gives a summary of the Calibrator s SOURce commands SOURce MODE Description This command returns the selected mode of the calibrator Query MODE Returns one of the following functions 44 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator High resistance source mode DPP Dielectric and polarization parameters mode PSP Programmable simulation of polarization absorption mode HVC High voltage capacitance mode SHORT Short current mode TIM Timer function mode SOURce HVR LEV lt DNPD gt Description This command sets value of resistance decade Parameters lt DNPD gt Resistance value in ohms Example HVR 1 25E 7 High resistance source mode with 12 5MQ Query HVR Returns the value of the selected resistance SOURce HVR VOLT Description This command returns the measured voltage on the output terminals Query HVR VOLT SOURce HVR CURR D
29. Standard Status Data Structures scccscscscscssccsssscscssesevsesscsscsssessessessssesesesssseseesees 52 Il Application examples sissessashsceiansstoucsiabavennseabecsasbatnssededousiaevaeasnasvabesdanbsveiancntowesienabesse 55 dene E A tan ek do p dad een Soa ha nel 56 N E E ALTI A E 58 User Manual v20 1 M191 Insulation Tester Calibrator MEATEST s r o List of tables Tab I Tab Tab Tab IV Tab V Tab VI Tab VII Tab VIII Tab IX Tab X Tab XI Function buttons High resistance mode ranges List of calibration points List of calibration points Verification test List of error messages RS232 connector RS232 cable description Abbreviation description SCPI Output commands SCPI Source commands Tab XII SCPI System commands Tab XIII SCPI Status commands Tab XIV SCPI Common commands Tab XV List of figures Fig 1 Fig 2 Fig 3 Fig 4 Fig 5 Fig 6 Fig 7 Fig 6 Fig 9 Fig 10 Fig 11 Fig 12 Fig 13 Fig 14 Fig 15 Fig 16 Fig 17 Fig 18 Fig 19 Fig 20 Fig 21 Fig 22 Fig 23 Accuracy Rear panel connection Front panel Display Rear pane UUT connection HVR mode Timer mode STANDBY Timer mode OFF SHORT mode High capacitance mode Programming the DPP mode Programming the PSP mode Time sequence in PSP mode RUNNING mode SETUP display Calibration menu Volt amper method of high resistance calibration VAM GPIB connector 9 pin co
30. ance value Calculate resistance of the M191 calibrator using following formula Real 1000 ka A Write down the value to the calibrator using numerical keypad Confirm by pushing the rotary button or ENTER button User Manual v20 31 M191 Insulation Tester Calibrator MEATEST s r o m Continue in calibration of next resistance segments up to position R44 Use the same system as in previous step n Disconnect multifunction calibrator and standard microammeter Push the SETUP button to exit the calibration mode Select item GND and switch it to ON p Enter again calibration mode q Connect standard d multimeter again to the output terminals H L r Measure resistance segment R45 write it down to the calibrator and confirm by ENTER button 6 DC voltage calibration a Make short terminal between H and L terminals Select position from the list of calibration points b Live readings in bits of the calibrator built in kV meter can be seen in right column Push the rotary button or ENTER button to save new calibration value c Disconnect short wire and connect output of multifunction calibrator Set DC voltage 5000 V on it d Switch on the standard calibrator output terminals Live readings in bits can be seen on M191 calibrator right column Push the rotary button or ENTER button to save new calibration value e Switch off the multifunction calibrator output terminals Disconnect the terminals Ja DC current
31. calibrator allows many other less frequently used parameters to be set Setup menu is used to set these parameters Setup menu is opened by pressing SETUP display button If output terminals are connected they will be disconnected automatically and the following display appears Fig 15 SETUP display Use the knob of the potentiometer to browse the menu options Active option is always inverted and when changed the descriptions of display buttons change as well Display buttons show how the respective parameter can be set Each parameter can be changed after the knob of the potentiometer is pressed Press EXIT display button twice to save the parameters when the setting is completed New settings are retained when the calibrator is switched off Setup menu offers the following options 1 GND xx ON OFF This parameter connects Lo terminal to GND terminal In practice this means that Lo terminal is grounded and connected to protection earth PE terminal in the mains socket By pressing the display buttons the terminal can be grounded or ungrounded ON is set by the manufacturer output terminal is grounded It is recommended to ground the test circuit when calibrating UUT If UUT is floating device battery operated the calibrator should be grounded If UUT is grounded the calibrator should be in non grounding mode otherwise wrong result of the calibration can be achieved 2 Keyboard beeper xx ON OFF This parameter allows the acoust
32. cess to Status Register Enable Register and Output Queue in the Calibrator Pon XE OFC ESR Event Status Register Y Read using ESR Ao Output Queue 4 Read using White using ESR v 7 6 5 4 32 2 o ESE Event Status Enable Register Fead by Serial Pall EG STB Status Byte Register G ti 4 Read using STB 4 a a ca i d 4 X 4 4 4 TT TIT TH TIS Y 4 POL Ws ME A Read using SRE Afte using SRE lt 7 6 5 4 3 2 1 o SRE Service Request Enable Register Status Register Overview Fig 20 Data structure Status data structure of M140 Calibrator contains following registers STB Status Byte Register SRE Service Request Enable Register ESR Event Status Register ESE Event Status Enable Register Output Queue STB Status Byte Register The summary messages from the Event Status Register and Output Queue are used to set or clear the appropriate bits B4 and B5 of the Status Byte Register These bits do not latch and their states 0 or 1 are solely dependent on the summary messages 0 or 1 For example if the Standard Event Register is read its register 32 User Manual v20
33. cient for the DPP mode Returns the measured voltage on the open output VOLTatge terminals 2 d TOTaltime Returns the measured total time Tab XI SCPI Source commands 42 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator SYSTem Command Summary Command Description SYSTem Path to System commands ERRor Returns the first error in the error queue REMote Places the Calibrator in the Remote mode RWLock Places the Calibrator in the Remote mode with lockout LOCal Sets the Calibration to the Local mode Tab XII SCPI System commands STATus Command Summary Command Description STATUS Path to the Status commands OPERational Path to the Operational Data registers Returns value in Operational Data Event register ENABle lt DPND gt Sets the bits of the Operational Data Enable register Returns the vaule in the Operational Data Enable register CONDition Returns the value in the Operational Condition register QUEStionable Path to the Questionable Data Event register Returns value in Questionable Data Event register ENABle lt DPND gt Sets the bits of the Questionable Data Enable register ENABLe Returns the vaule in the Questionable Data Enable register CONDition Returns the value in the Questionable Condition register PRESet Clears all bits in Op
34. command Unexecutable command in this state of calibrator SCPI Query error Bad query command Output queue is not empty Out of range 0 5 99 9 The user entered a value of coefficient outside the range Internal timing error Internal error Internal error of the calibrator Turn the calibrator off and after 5 s turn on If the error will appear again contact manufacturer SCPI Device error Unexecutable command Violated the conditions of feasibility Out of range 10 100 value is out of range The user entered a resistance value outside the range Set higher resistance value is out of range Resistance value is too low Set higher Set lower resistance value is out of range Resistance value is too High Set lower Wrong password Incorrect password entered Enter correct calibration password Please try again in calibration mode Tab VI List of error messages Set shorter time value is out of range The user entered a time value outside the range 04 05 07 10 11 12 13 14 User Manual v20 37 M191 Insulation Tester Calibrator MEATEST s r o 9 Calibrator maintenance The multifunction calibrator is electronic instrument with microprocessor control All blocks which are heavily loaded during the operation are cooled by a fan Rules for correct operation Especially the following rules should be adhered to guarantee correct operation of the calibrator e The calibrator can only be switched on and off by press
35. cts are spread through the mains or propagated by the electromagnetic field e strong electrostatic or electromagnetic field which can cause major instability during calibration using higher impedance User Manual v20 39 M191 Insulation Tester Calibrator MEATEST s r o 10 System control The calibrator includes standardized IEEE 488 bus and RS232 serial line System connectors are located at the rear panel For the remote control to work properly bus parameters must be set in the system menu For IEEE 488 bus address is important 0 to 30 setting range For RS232 bus communication speed can be set 9600 to 115200 Bd The calibrator can be only controlled by one interface at a time It is therefore necessary to select one of the interfaces GPIB RS232 using the system menu 9 1 IEEE 488 bus properties The instrument performs the following functions based on GPIB bus commands SHI AHI T5 L3 RL1 DCI SRI Bot Dio The instrument also recognizes the following general commands DIO2 0 06 3115 0107 0104 DIO8 DCL Device Clear EOI REN DA GND TW PAIR WIDA SDC Selected Device Clear NRFD GND TW PAIR 8 20 GND TW PAIR WINDAC EOI End or Identify Message Terminator IFC GND TW PAIR W IFC 10122 GND TW PAIR W SRQ ATN L11 23 GND TW PAIR W ATN GTL Go To Local SHIELD SIGNAL GROUND LLO Local Lock Out SPD Serial Poll Disable iS SPE Serial Poll
36. d in the power cord receptacle Procedure is following Remove the end of power cord from the mains connector at the rear panel nsert the blade of a flat screwdriver into the opening cut in the mains voltage selector and pry out the fuse holder Remove fuse Replace it with new fuse of the same rating if the fuse was broken Replace the fuse holder reconnect the power cord and switch on the calibrator If the problem persists contact the manufacturer 38 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator If an obvious fault is evidenced e g a measurement range or an operating mode is not functional the user cannot correct the fault Contact the manufacturer Hidden faults can cause different symptoms and be caused by different causes Usually they cause instability of some parameter Hidden defects can be caused by unacceptable distortion degraded insulation etc In this case contact the manufacturer Sometimes it seems that the calibrator has hidden defect when the rules for correct operation are not adhered to In this case the fault is caused by the operator Most frequent cases of false hidden defects mains voltage of tolerance limits or unstable wrong grounding of the measurement circuit bad connection of the ground terminal of the mains outlet or several ground connection when grounding loops are formed proximity to sources of intensive influence whose produ
37. ding lead banana banana e Cable GPIB IEEEA88 IEEEA488 2m Manufacturer MEATEST s r o Zelezna 3 619 00 Brno Czech Republic Service MEATEST s r o Zelezna 3 619 00 Brno Czech Republic Local distributors 58 1 pc 1 pe 1 pe 1 pe 1 pe 1 pe 1 pe 1 pe tel 420 543 250 886 fax 420 543 250 890 meatest meatest com tel 420 543 250 886 fax 420 543 250 890 meatest meatest com User Manual v20
38. e in one range 10 kV and both signal polarities and DC Short current meter calibration is performed by setting the zero and slope of the scale in one range 10 mA and in both signal polarities and Access to the calibration procedure Calibration code is required to access the calibration procedure Press SETUP to open the setup menu Select CALIBRATION item and confirm with ENTER button Enter the correct calibration code using numeric keyboard and press ENTER incorrect calibration code is entered an error message appears on the display Wrong password Try again If correct calibration code is entered calibration menu appears The calibration menu contains following functions Use rotary button to move the cursor through the list 1 RESISTANCE Resistance calibration 2 VOLTAGE DC All DC voltage ranges calibration CURRENT DC All DC voltage ranges calibration 4 CAPACITANCE fix capacitance values calibration Fig 16 Calibration menu User Manual v20 27 M191 Insulation Tester Calibrator MEATEST s r o Selection and setting of calibration point After the calibration menu is displayed one of partial calibrations can be selected Use rotary button to move the cursor through the list Having selected the required function to be calibrated press the rotary button or ENTER button to enable the calibration value in right column for editing Output terminals are automatically switched on at t
39. ect calibrator output to standard multimeter of type according to the table Tab V select function of ohmmeter 3 Set resistance values 1 to 100 in the calibrator Check reading of the standard multimeter and compare with limits in the table Tab V 4 Select function High ohm in standard multimeter Set resistance values 200kQ to 10 GQ in the calibrator Check reading of the standard multimeter and compare with limits in the table Tab V User Manual v20 33 M191 Insulation Tester Calibrator MEATEST s r o 5r 34 Disconnect standard multimeter Connect multifunction calibrator and standard multimeter according to the table Tab V see fig 18 Select function ADC in the standard multimeter and set 1000VDC in standard multifunction calibrator Set resistance values 20 GQ to 100 GO in the calibrator Calculate measured resistance according to formula 1000 7 where is standard multimeter reading Compare with the limits in the table Tab V Connect DC High voltage source instead of multifunction calibrator according to the table Tab V Set recommended DC voltage 5000V or 1000VDC according to the table Tab V If necessary check DC output voltage using standard DC voltage divider and standard voltmeter Set resistance values 20060 50060 10 100M9 1GO 1060 100GQ ITQ according to the table V Calculate measured resistance according to formula where Iis standard multimeter reading and U is output vol
40. egister Selected bits are summarized at bit 7 OSS of the IEEE 488 2 Status Byte register Parameters lt DNPD gt Represents the register bits as a decimal number Example STAT OPER ENAB 2 Sets bit 1 of the Operational Data Enable register while all other bits are set to 0 Query STAT OPER ENAB Returns the value of the Operational Data Enable register as a decimal value STATus OPER COND Description This query command returns the content of Operational Condition register It s decimal value corresponds to the binary weighted sum of all bits set in the register Register is not cleared after this query The response to the query therefore represents an instantaneous Snapshot of the register state at the time that the query was accepted STATus QUES EVEN Description This query command returns the content of Questionable Data Event register It is a decimal value which corresponds to the binaryweighted sum of all bits set in the register Register is cleared after this query STATus QUES ENAB lt DNPD gt Description This command enables bits in the Questionable Data Enable register Selected bits are summarized at bit 3 OSS of the IEEE 488 2 Status Byte register User Manual v20 49 M191 Insulation Tester Calibrator MEATEST s r o Parameters Example Query lt DNPD gt Represents the register bits as a decimal number STAT QUES ENAB 2 Sets bit 1 of the Questionable Data Enable register
41. eration Data Enable and Questionable Data Enable register Tab XIII SCPI Status commands User Manual v20 43 M191 Insulation Tester Calibrator MEATEST s r o Common Command Summary Command Description IDN Returns manufacturer model number serial number and firmware revision number OPC Sets the OPC bit in the Event Status Register OPC Returns 1 when all pending operations are complete Prevents the Calibrator from executing command or queries until all previous remote commands have been executed RST Resets the Calibrator to its initial status Starts a Calibrator self test and returns 0 for pass and TST fe 1 for fail STB Returns value in the Status Byte Register SRE lt value gt Sets the Service Request Enable register SRE Returns value in the Service Request Enable register ESR Returns value in Event Status register ESE value Sets the Event Status register ESE Returns value in the Event Status Enable register CLS Clears the Event Status register Tab XIV SCPI Common commands SCPI Command Details The following sections give a detailed description of each command Using the OUTPut Commands Remotely controlling the application of the output signal to the Calibrator s output terminals is accomplished through the OUTPut command Table IX give a summary of the Calibrator s OUTPut commands OUTPut
42. escription This command returns the measured current flowing through selected resistance Query HVR CURR SOURce TIM LEV 2 Description This command returns measured time Query TIM Returns the value of measured time SOURce TIM VOLT Description This command returns the measured voltage on the output terminals Query TIM VOLT SOURce SHOR CURR 2 Description This command returns measured current Query SHOR Returns the value of measured current User Manual v20 45 M191 Insulation Tester Calibrator MEATEST s r o SOURce HVC LEV lt CPD gt 0 1 2 Description This command selects one of three discrete capacitance closest to the value specified by DNPD Parameters lt CPD gt 0 sets CO capacitor 1 sets capacitor 2 sets C2 capacitor Example HVC CI High voltage capacitance with 10nF Query HVC Returns the name of the selected resistance SOURce HVC VOLT Description This command returns the measured voltage on the output terminals Query HVC VOLT SOURce PSP TOT Description This command returns measure of total time Query PSP TOT SOURce PSP VOLT Description This command returns the measured voltage on the output terminals Query PSP VOLT SOURce PSP RHESO lt DNPD gt Description This command sets value of RO Parameters lt DNPD gt Resistance value in ohms Example PSP RESO 1 25E 7 RO in PSP mode is set to 12 5
43. est voltage level in UUT Select resistance range in UUT if necessary F Activate UUT measurement typically by pushing ON button on the UUT UUT starts to source DC test voltage G M191 calibrator measures the test voltage and display both test voltage and current H Compare UUT reading to M191 set resistance I Switch the UUT output OFF to remove test voltage from its output J Disconnect M191 output terminals using the button OUTPUT ON Be aware that the test voltage for high resistance measurements is dangerous and can cause electric shock Notes Test leads delivered with the calibrator are approved for application up to 5kVDC Use test leads delivered with UUTs for higher test voltages Don t change set resistance value when test voltage above Vo is connected to the output terminals see table II Change the resistance value is allowed only when attached test voltage is lower than Vo in Table II If the test voltage is over Vo and attempt to change the resistance is registered calibrator does not disconnect the output terminals and shows error message Err2 Set voltage bellow Vo Setup resistance is not changed Switch off the test voltage first or decrease its value to level lower than shown in the table II Before the output terminals are switched to ON state calibrator measures test voltage If the test voltage is higher than the limits in Table II calibrator does not execute the ON command Instead of this Errl T
44. he same time ready for measuring the selected calibration point e Measure the resistance value using standard ohmmeter when resistance segment is calibrated and write down new resistance value Confirm with ENTER button or rotary button Connect RCL standard meter when capacitance calibration point is to being calibrated and write down new resistance value Confirm with ENTER button or rotary button e When built in kV meter is calibrated connect DC voltage of requested value from standard unit and confirm with ENTER button or rotary button to save new calibration data e When built in mA meter is calibrated connect DC current of requested value from standard unit and confirm with ENTER button or rotary button to save new calibration data Go on to next requested calibration point When no change of the calibration value is requested push the rotary button of ENTER button once more The original calibration value is refreshed Both complete and partial calibration is possible When only some calibration points are changed all other non changed calibration points are stored with original data New calibration value is saved immediately when ENTER button or rotary button is pushed for new value confirmation Calibration process can be interrupted or left any time by pushing the button SETUP Calibrator returns to the last selected function Note When resistance points are calibrated two terminals way of connection of the calibrator to
45. he standard multimeter to the H L output terminals of the calibrator Use two wire connection Set standard multimeter to resistance mode 5 digit resolution Select first partial resistance segment ROO by pushing the rotary button or ENTER button Read the resistance value indicated by standard multimeter and write down the value to the calibrator using numerical keypad Confirm by pushing the rotary button or ENTER button Continue in calibration of next resistance segments up to position R37 Use the same system as in previous step Non direct measurement using volt amper method Disconnect standard multimeter Push the SETUP button to exit the calibration mode Select item GND and switch it to OFF Enter calibration mode again Connect standard multifunction calibrator and standard microammeter to the M191 calibrator as shown in the fig 17 Note It is recommended to apply shielded test lead for calibration of partial resistors of values above I GQ with shielding connected to the GND terminal eee Gece Q h Fig 17 Volt amper method of high resistance calibration VAM Set 1000 VDC test voltage on the standard multifunction calibrator Set AUTORANGE in standard microammeter Select calibration point R38 Switch the multifunction calibrator output voltage ON Read the current value indicated by standard microammeter Settling time can reach up to several minutes depending on calibrated resist
46. ic indication of pressed buttons to be switched off or on ON and OFF display buttons can be used to switch the indication off or on ON is set by the manufacturer 3 Display contrast xx 0 100 This parameter sets the contrast of the display UP and DOWN display buttons allow to set the value in the range of 0 to 100 96 4 Volume xx 0 100 This parameter allows the volume of acoustic indication to be set UP and DOWN display buttons allow to set the value in the range of 0 to 100 The bigger the value the louder sound 5 Calibration password 000000 Entry of calibration code Calibration code is a six digit number which must be entered to access the calibration mode If the calibration code is set to 000000 this information is displayed in the Setup menu Calibration code can be changed New calibration code can be directly entered using numeric keyboard and confirmed by User Manual v20 25 M191 Insulation Tester Calibrator MEATEST s r o pressing ENTER If non zero calibration code is set correct calibration code must be entered to access the calibration mode Non zero calibration code is not displayed further on the display 6 Serial number XXXXXX Displays the serial number of the calibrator The parameter cannot be changed 7 Active interface xx GPIB RS232 Displays the type of interface used to control the calibrator from a PC By pressing GPIB or RS232 buttons the respective
47. ing the mains switch located at the rear panel Do not connect the calibrator to other voltage than set by the voltage selector Do not block the vent openings located at the rear panel and bottom panel e The calibrator must not be operated in dusty or wet environment It was designed to be used in a laboratory No liquid or small objects can be permitted to enter the calibrator through the vent openings Do not switch the calibrator outside its operating temperature range Connect the instruments to be calibrated to proper output terminals There is no way of protecting the calibrator from the damage caused by some improper connections Do not damage the output terminals by plugging in bananas thicker than the terminals were designed for Whenever possible use the setup menu to ground L output terminal GND ON setup function Regular maintenance The calibrator does not require any special maintenance of electrical or mechanical parts If is gets dirty the case and the display can be cleaned by a wool rag moistened with alcohol The calibrator should be calibrated in the recommended 12 month intervals A calibration center equipped for high resistance measurement should perform the calibration What to do in case of failure If an obvious failure occurs during the operation e g the display is not lit the fan is not turning the calibrator must be switched off immediately First check the fuse locate
48. ire connection high voltage mode VAM Volt amper method using multifunction calibrator and uA meter DM PC direct measurement using standard process calibrator RCL direct measurement using standard RCL meter test frequency 100 Hz test voltage 1V CV calibration value of the capacitance 36 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator 8 Error messages If an error occurs during the calibrator s operation or control error message is displayed on the display Errors can be caused by jncorrect control using the front panel i e attempts to force a prohibited mode e g setting an out of range value overloading of output terminals etc fault of the calibrator e g internal communication error during the communication between individual functional blocks incorrect control using the GPIB or RS 232 bus Structure of error message is as follows Err xx yyyyyyyyy where 15 number of the error yyyyyyyy is text description of the error The following table lists all error messages their meaning and simple troubleshooting Label Description Troubleshooting 01 Too high test voltage Max voltage overloaded Output voltage is too high 02 Set voltage below lt value gt Voltage is too high Voltage is too high for change value of resistance decade 03 SCPI Command error SCPI mismatch command Not known command on GPIB RS232 SCPI Execution error Unexecutable
49. is held up until the M140 responds SRE Service Request Enable Register The Service Request Enable Register is an 8 bit register that enables corresponding summary messages in the Status Byte Register Thus the application programmer can select reason for a device M140 to issue a service request by altering the contents of the SRE The Service Request Enable Register is read with the SRE common query The response message to this query represents the sum of the binary weighted values of the SRE The value of unused bit 6 shall always be zero The Service Request Enable Register is written with the SRE common command followed by an integer value 0 191 Sending SRE common command followed by a zero clears the SRE A cleared register does not allow status information to generate a rsv local message and thus no service request are issued The Service Request Enable Register is cleared upon power on ESR Event Status Register The Event Status Register is a two byte register in which the higher eight bits are always 0 and the lower eight bits represent various conditions of the M140 calibrator The ESR is cleared when the power is turned on and every time it is read Bit configuration of Event Status Register PON Power On bit 7 This event bit indicates that an off to on transition has occurred in the device s power supply URQ User Request bit 6 This event bit indicates disconnecting or connecting of any cable adapter to the
50. istance value RO for the PSP mode RESistance1 lt DNPD gt Sets the resistance value R1 for PSP mode RESistance1 Returns the resistance value R1 for the PSP mode RESistance2 lt DNPD gt Sets the resistance value R2 for PSP mode RESistance2 Returns the resistance value R2 for the PSP mode RESistance3 lt DNPD gt Sets the resistance value R3 for PSP mode RESistance3 Returns the resistance value R3 for the PSP mode TTIMe1 lt DNPD gt Sets the time value T1 for PSP mode TTIMet1 Returns the time value T1 for the PSP mode TTIMe2 lt DNPD gt Sets the time value T2 for PSP mode TTIMe2 Returns the time value T2 for the PSP mode TTIMe3 lt DNPD gt Sets the time value T3 for PSP mode TTIMe3 2 Returns the time value T3 for the PSP mode DPParameters Sets Calibrator to Dielectric and polarization parameters mode RESistance0 lt DNPD gt Sets the resistance value RO for DAR mode RESistance0 Returns the resistance value RO for the DPP mode CDARatio lt DNPD gt Sets the DAR coefficient for DPP mode CDARatio Returns the coefficient of DAR value for the DPP mode CPIndex lt DNPD gt Sets the PI coefficient for DPP mode CPIndex Returns the coefficient of PI value for the DPP mode CPRatio lt DNPD gt Sets the PR coefficient for DPP mode CPRatio Returns the coefficient of PR value for the DPP mode ROUTput Returns the actual output resistance for the DPP mode RCOunt Returns the conted resistance value RO coeffi
51. lected position will appear C Select requested test voltage level in UUT Select resistance range in UUT if necessary Connect output terminals of the M191 on by pushing the button OUTPUT ON Green LED starts to light M191 starts to measure short current E Select requested test voltage level in UUT Select resistance range in UUT if necessary F Start UUT measurements typically by pushing ON button on the UUT UUT starts to source DC current G M191 calibrator measures the short current and displays it H Compare M191 reading to UUT specification I Switch the UUT output OFF to remove test voltage from the output terminals User Manual v20 19 M191 Insulation Tester Calibrator MEATEST s r o J Disconnect M191 output terminals using the button OUTPUT ON Notes The capacitance function is designed for DC applications AC test voltage is not allowed to apply When using AC voltage over 100 V the calibrator can be damaged The capacitance function is designed for testing of insulation meters and megaohmmeters which can measure the capacitance in test circuit based on charging and discharging the circuit Any other application is not recommended Don t disconnect test wires when measuring is in process Disconnection can cause damage of the calibrator Be aware that the test voltage for high resistance measurements is dangerous and can cause electric shock Test leads delivered with the calibrator are approved fo
52. lue The Event Status Enable Register is written to by the common command ESE Sending the ESE common command followed by a zero clears the ESE The Event Status Enable Register is cleared upon power on Output Queue The Output Queue stores response messages until they are read The availability of output is summarized by the MAV message available summary message The MAV summary message is used to synchronize information exchange with the controller The Output Queue shall be a first in first out FIFO Queue The Output Queue is cleared upon power on 54 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator 11 Application examples Calibration of insulation testers The calibrator can be used for direct calibration of megaohmmeters with test voltage up to 10 kV DC Use always grounding mode when UUT is floating Guard terminal and GND terminal are on the same potential and they are connected with protection earth in the power line socket Connection of some UUT is shown bellow A Floating battery operated megaohmmeter with three terminal connection with shielding fig 21 M191 Insulation tester calibrator C Precise three terminal megaohmmeter with shielding fig 23 User Manual v20 55 M191 Insulation Tester Calibrator MEATEST s r o 12 Specification Accuracies include long term stability temperature coefficient linearity load and line regulation and the traceability of facto
53. n the display shows the following oF symbol During function change output terminals are always disconnected 44 HVR High resistance source mode The calibrator basic function is High resistance source mode HVR In the mode any resistance value in range from 10 kQ to 1 TQ can be set and connected to the output terminals Maximum allowed working DC voltage is from range 50 V to 10 000 V depending on set resistance Switching the resistance value under test voltage is allowed in limited voltage range The resistance partial ranges absolute voltage limits and maximum applicable test voltage when the resistance is switched over are shown in the table Resistance range Q Vmax Absolute DC test voltage Vo Maximum test voltage for A overswitching V Tab II High resistance mode ranges 500 0 M 999 9 M 10 000 3 000 In HVR mode the calibrator display enables setting only the main resistance value Fig6 mode Following information are displayed on the display Setresistance value in Q max Maximum safe test voltage which is allowed to apply to the output terminals Displayed value varies depending on set main resistance value in range 50 V to 10 000 V A Applied test voltage This is value of DC test voltage sourced by UUT and connected to the calibrator output terminals Calibrator measures the test voltage when resistance is set in range from 10 kQ to 300 0 GQ In range from 300 1 GQ to 1 000
54. nce state i e the following parameters are set 6 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator Function HVR High resistance source Nominal resistance value 100 MQ Output terminals OFF GPIB address of the calibrator is factory preset to 24 This value is valid until the user changes it Universal Euro Earth grounding Fig 1 Rear panel connection Note calibrator resets to its reference status in case of power switching off 2 4 Warm up time The calibrator works after it is switched on and the initial checks complete Specified parameters are only guaranteed after the instrument warms up for 15 minutes During this period the instrument should not be calibrated however it enables full access to calibration memory 2 5 Replacement of fuse The calibrator includes a fuse located in the mains entry module at the rear panel Replace the fuse as follows Switch off the calibrator Remove the end of power cord from the mains connector at the rear panel e Insert the blade of a flat screwdriver into the opening cut in the mains voltage selector and pull out the fuse holder e Remove the fuse and replace it with new fuse of the same rating 2 6 Safety precautions The instrument has been designed in Safety Class I according to EN 61010 1 The design reflects the requirements of A2 amendment of the standard Safety is ensured by the design and by the use of specific component
55. ng standard process calibrator RCL direct measurement using standard RCL meter test frequency 100 Hz test voltage 1V Full calibration procedure Following pages describe procedure of the full calibration Required instruments Following instruments are required for calibration e 81 2 digit multimeter type Fluke 8508A or similar with 0 01 accuracy and range to 20 GO e 81 2 digit multimeter Agilent 3458A or pA meter Keithley 2635A or similar with DC current range 100 nA to 10 mA meter Agilent 4263A Agilent 42784 or other with accuracy 0 1 90 Multifunction calibrator Meatest M 140 M142 Fluke 5500A or similar with DC voltage range to 1000 V Process calibrator Burster 4423 Fluke 745A or similar with DC current range to 10 mA and accuracy 0 1 e DC High voltage source Heinzinger PNC 10000 or similar with output voltage accuracy 0 2 Calibration procedure 1 Connect the calibrator and the multimeter to the mains and let them switched on for at least 30 minutes in a laboratory at 23 1 C and RH lt 50 2 Press SETUP display button to call up the setup menu Select item GND and switch it to ON 3 Select CALIBRATION MENU item 4 Enter the calibration code and press ENTER default calibration code is 000000 30 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator 3 Resistance calibration Direct measurement using standard multimeter Connect the input terminals of t
56. nnector D SUB MALE Data structure Floating battery operated megaohmmeter with shielding Floating battery operated two terminal megaohmmeter Precise three terminal megaohmmeter User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator ATTENTION The calibrator can carry test voltage generated by UUT up to 10 DC The calibrator must be connected to protection earth using extra wire between rear panel grounding terminal and protection earth Don t use the calibrator when not properly connected to the mains socket Use the test leads delivered with UUT which is calibrated Red test lead supplied with the calibrator is approved up to 5 kV DC Application of the test leads for high voltage is dangerous The calibrator can only be used in accordance with this operation manual Use the calibrator for calibration of safety testers and insulation meters User Manual v20 3 M191 Insulation Tester Calibrator MEATEST s r o 4 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator 1 Basic Information M191 Insulation tester calibrator is a device designed for application field of calibration of insulation testers It can be used for calibration of any DC high resistance meter with working voltage up to 10 kV M191 calibrator is based on programmable high resistance decade which is completed with additional electronic circuits allowing calibration not only resistance ranges
57. nsulation Tester Calibrator Complete calibration consists of all partial calibrations performed in the order defined by the calibration menu If an item of the calibration menu e g VOLTAGE is selected it is not necessary to calibrate all ranges defined by the calibration algorithm If new calibration of all ranges is not possible e g the required standard is not available old calibration data can be confirmed i e current step of the calibration can be skipped Calibration interruption can be performed in any point of the calibration procedure However this particular calibration influences parameters of the calibrator Accuracy of the calibrator is guaranteed when full calibration was done Resistance calibration is performed by entering and saving calibration values of all partial resistors Number of partial resistors is 40 in summary range from 10 to 500 GQ Calibration of the resistors is based on measuring the partial resistors using standard multimeter and megaohmmeter and saving the data in calibrator calibration memory Capacitance calibration is performed by entering and saving calibration values of three partial high voltage capacitors with nominal values 10 nF 50 nF 50 nF Calibration of the capacitors is based on measuring the partial resistors using standard RCL meter and saving the data in calibrator calibration memory DC High voltage meter calibration is performed by setting the zero and slope of the scal
58. o confirm the selection ENTER CANCEL button can be used to cancel the entry 4 Output terminals Resistance decade box of the calibrator is connected to the output terminals Meaning of the front panel terminals is as follows H High potential 4 mm signal terminal with additional insulation support is signed H The H terminal can be connected up to maximum specified voltage for set resistance The terminal should be kept clean to avoid stray conductance and leakage currents between H terminal and housing Maximum safe external voltage connected to the H terminal is 10 kV DC Do not use AC test voltage 10 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator GND GUARD Low potential 4 mm signal terminal is signed L The L can be used either in grounded mode or in floated mode In grounded mode the L terminal is connected to protection earth and calibrator housing via internal relay In floated mode the L terminal is not connected to protection earth Whole resistance decade is floating in the floating mode Maximum safe DC voltage between L terminal and GND terminal is 15 V Don t exceed this limit Ground terminal is connected to the chassis of the calibrator And to the protection earth wire of the mains plug Using the SETUP MENU the output terminals of the calibrator can be grounded or floating Grounding is done internally by connecting L and GND terminals using a relay Grounded mode is suitable for m
59. onnectors for connection to GPIB bus and type plate with serial number 3 5 2 Fig4 Rear panel 1 air inlet 12 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator 2 GPIB RS 232 connectors 3 power cord socket with fuse mains voltage selector mains switch 4 model plate 5 grounding terminal 3 3 UUT connection The calibrator is designed for calibration of insulation meters Insulation meters can source dangerous DC voltage Following rules are necessary to keep on mind calibrator must be properly connected to source of mains voltage Extra lead must be used to connect rear panel grounding post and protection earth see chap 2 3 Connection of UUT to the calibrator can be performed only when UUT is switched off or UUT is in standby mode with no test voltage on the output terminals e The calibrator housing has to be connected to protection earth of the mains using green yellow grounding lead The lead is standard part of packing e Set always grounding mode ON when calibrating floating UUTs M191_Insulation tester calibrator Fig5 UUT connection to the calibrator 4 Control of the calibrator 4 1 Selection of function After the power is switched on and the initial checks complete the calibrator resets to its reference status i e High resistance mode HVR with set value of 100 MQ and output terminals disconnected The status of the calibrator can be changed using the butt
60. ons located at the front panel in one of the following ways 1 Change of function by pressing one of function buttons FUNCTION UP or FUNCTION DOWN After pressing the function button another function from the sequence HVR TIMER SHORT HVC PSP DPP is selected The calibrator switches to the desired function mode and resets either to the reference value when it User Manual v20 13 M191 Insulation Tester Calibrator MEATEST s r o is selected the first time after power on or to the most recently used parameter setting when the function have been already selected after power on 2 Connection disconnection of output terminals After pressing the OUTPUT ON button the output terminals of the calibrator are connected disconnected The output on statue is indicated by LED diode above the button and with the sign ON in the right upper corner of the display 3 Entry to the setup menu After pressing the SETUP button options of the SETUP MENU appear on the display Last item of the SETUP menu is entry to the calibration mode When selected the calibration mode previous function is restored by pressing of EXIT display button 4 2 Setting the value Setting of numerical values in all functions can be made in two ways Entry of the value using numeric keyboard e use the numeric keyboard to select the desired value After the first digit is entered symbols of unit of measurements are displayed above the display buttons The monitor line
61. oo high test voltage is displayed Decrease test voltage before continue 4 5 TIMER Timer function Timer function allows to verify Timer features of safety testers and megaohmmeters Calibrator can measure time interval for what the UUT test voltage is presented on the calibrator output terminals During the measurement the calibrator goes automatically through sequence of statues OFF STANDBY RUNNING OFF In Timer function calibrator automatically connects to the output terminals resistance value 100 The value cannot be modified 16 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator Display shows information as follows Standby mode Fig 7 Timer mode STANDBY Measured time in seconds with 100 ms resolution Vmax parameter is maximum DC test voltage which has been caught by the calibrator during time interval of the Timer calibration Test voltage Current test voltage presented on the calibrator output terminals during calibration process Accuracy of the measured time interval in s Operating procedure A Connect UUT to the output terminals Use only test leads with guaranteed isolation according to test voltage range of UUT Use test leads delivered with UUT whenever it is possible Select TIMER mode pushing repeatedly FUNCTION UP or FUNCTION DOWN button until TIMER label appears on the display Select requested test voltage level in UUT Select resistance range in UUT if nece
62. ost calibrations where the object multimeter being calibrated is floating battery operated The metal 4 mm terminal is shielding terminal equipotential The terminal is connected inside the calibrator to the low GND terminal Under standard condition it should be connected to the shielding wire of the test leads of UUT 5 Output ON OFF The button enables to switch ON or OFF the output terminals Status of the output indicated with LED diode placed above the button 6 Function buttons Function buttons are used to call up the functions of the calibrator and to confirm entered values respectively The following buttons are provided Meaning Function UP Selection of main function in steps UP Function DOWN Selection of main function in steps DOWN SETUP SETUP setting recall LOCAL Switch to local mode when in remote Confirm new entered value in Confirm new entered value in MQ Confirm new entered value in GQ Confirm new entered value in TQ Tab I Function buttons Using the FUNCTION UP or FUNCTION DOWN button one of following functions can be activated High resistance source This is the main function in the calibrator It enables to set up any resistance value in specified resistance range and connect it to the output terminals TIMER Timer function of UUT testing User Manual v20 11 M191 Insulation Tester Calibrator MEATEST s r o The function is designed to calibrate TIMER function in UUT
63. owing additional parameters are displayed in DAR mode R out value It is actual resistance value which is currently connected in the RUNNING mode to the output terminals V max parameter 3 kV is maximum applicable test voltage Test voltage Reading of currently applied DC test voltage is displayed Total time The time which has been elapsed after the starting RUNNING sequence Accuracy of actually connected resistance in Operating procedure A Connect UUT to the output terminals Use only test leads with guaranteed isolation according to test voltage range of UUT Use test leads delivered with UUT whenever it is possible B Select DPP mode pushing repeatedly FUNCTION UP or FUNCTION DOWN button until DPP label appears on the display C Use rotary button to select and enter parameter RO PARAMETER and coefficient Select requested type of parameter and confirm with ENTER button or rotary button Write requested resistance value using the numerical keypad and range buttons MQ GO and push ENTER button or rotary button to confirm Write the coefficient and confirm by pushing the ENTER button D When requested parameters are set up push the OUTPUT ON button Calibrator connects resistance value RO to the output terminals and it is waiting for test voltage from UUT The test voltage must be higher than 100 VDC to start the RUNNING sequence User Manual v20 21 M191 Insulation Tester Calibrator MEATEST s r o E
64. r application up to 5kVDC Use test leads delivered with UUTs for higher test voltages 4 8 DPP Dielectric and polarization parameters DPP function enables direct calibration if isolation meters which are equipped with function of DAR dielectric absorption ratio PI polarization index or PR polarization ratio Similarly to the PSP mode the DPP mode is based on switching three different values of resistance to the output terminals in predefined time sequence Parameters definition In isolation testers DAR parameter is defined as a ratio of resistance 30 s after the test voltage is connected to the measured object and resistance R2 measured 60 s after the test voltage is connected DAR RI 60s R2 30s PI parameter has similar definition It is defined as a ratio of resistance R1measured 60 s after the test voltage is connected to the measured object and resistance R2 measured 600 s after the test voltage is connected PI 600s R2 60s PR parameter is defined as a ratio of resistance R1 measured 15 s after the test voltage is connected to the measured object and resistance R2 measured 180 s after the test voltage is connected PR 180s R2 15s The calibrator has predefined the time sequences both for DAR and PI parameters to simulate these parameters Depending on status the DAR mode can be in one of following submodes Operating modes 20 User Manual v20 MEATEST s r o M191
65. r for 24 hours in room temperature before unpacking especially if during transport the cartoon was exposed temperature lower than 10 C The calibrator should be powered by 115 V 230 V 50 60 Hz mains Before powering on the instruments place it on a level surface Do not cover the vents at the bottom side and the fan opening at the rear panel 2 2 Ambient conditions The calibrator is a laboratory instrument whose parameters are guaranteed at 23 2 C For application in full resistance range the relative humidity should not exceed 50 RH In resistance range from 10 kO to 10 GQ the calibrator can be applied up to relative humidity to 70 RH Accuracy is not guaranteed for operation in relative humidity above 70 RH 2 3 Power on e Before connecting the calibrator to the mains check the position of the mains voltage selector located at the rear panel e Connect rear panel grounding terminal to protection earth of the mains Plug one end of the power cord into the connector located at the rear panel and connect the other end of the power cord into a wall outlet e Connect rear panel grounding post with earthing ground protection earth individually using green yellow grounding lead see fig 1 e Switch on the mains switch located at the rear panel Front panel display is lit calibrator performs internal hardware checks for approximately 5 seconds After tests conclude the calibrator resets to its refere
66. ror queue as an error code followed by an error message SYSTem REM Description This command sets the Calibrator in remote mode for remote control through the RS 232 or IEEE 488 AII keys on the front panel except the LOCAL key are disabled Note 48 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator It is not possible to send or receive data over the RS 232 or IEEE 488 when the calibrator is not in remote mode SYSTem RWL Description This command sets the Calibrator in remote mode for remote control through the RS 232 or IEEE 488 All keys on the front panel except the LOCAL key are disabled SYSTem LOC Description This command returns the calibrator to local mode This command is used only when controlling the Calibrator through the RS 232 or TEEE 488 Using the STATus Subsystem This subsystem is used to enable bits in the Operation and Questionable Event registers The Operation and Questionable Event Enable and Condition registers can be interrogated to determine their state Table XIII give a summary of the Calibrator s STATUS commands STATus OPER EVEN Description This query command returns the content of Operational Data Event register It is a decimal value which corresponds to the binaryweighted sum of all bits set in the register Register is cleared after this query STATus OPER ENAB lt DNPD gt Description This command enables bits in the Operational Data Enable r
67. ry and National calibration standards Specified accuracy is valid after one hour warm up in temperature range 23 2 C Specified accuracy is one year accuracy 1 Function HVR High resistance programmable decade box Total resistance range 10 00 to 1000 0 GQ Accuracy in grounded mode G and floating mode F Resistance range Accuracy Accuracy Maximum Typical Test voltage Test current inG in DC test voltage accuracy current accuracy Q mode mode voltage dependency range V ppm V A 299 9G 1000 0G __ 50 60 1000 lt 020 Tab XV Accuracy Accuracy is valid in reference temperature range 23 2 C with RH lt 50 Calibrator display always displays accuracy valid for G mode Test voltage voltmeter function is not available in resistance range from 299 9 GO to 1 000 GO Maximum measured DC test voltage is 5 over the specified range doe Test voltage range 10 000 VDC 596 over range see Tab XIII Maximum applied voltage during over switching 3 000 VDC without output terminals disconnection Test voltage indication 4 digit meter with range to 10 KVDC with suppressed indication bellow 50 VDC Test voltage accuracy 0 5 10 V Test current indication 4 digit meter in range from 0 01 pA to 99 99 mADC Maximum safe DC voltage between H and L terminal 11000 VDC Maximum safe DC voltage between L and GND terminal 15 VDC 2 Function SHORT Short test current Current range 0 000 5 00
68. s like HIPOT testers insulation metes programmable megaohmmeters etc Using the function accuracy of time interval in which the UUT test signal is connected to its output terminals can be easily performed SHORTShort current of UUT measuring The function allows measuring of short current supplied by UUT when the output terminals are shorted HVC High voltage capacitance The calibrator contains three high voltage capacitors with nominal vales 10 50 100 nF Using the function capacitance measurement function of UUTs megaohmmeters can be verified DPP Simulator of polarization absorption parameters The function can simulate various polarization absorption indexes often built in the UUTs The functions enables to switch over the output resistance in predefined time from one value to another value In this way the calibrator can simulate the above mentioned parameters Following parameters are predefined DAR Dielectric absorption ratio PI Polarization index PR Polarization ratio PSP Programmable simulation of polarization absorption parameters The function enables to switch over the output resistance in by user predefined time from one value to another Up to four different resistance values can be step by step connected to the output terminals in selected time intervals 3 2 Rear panel The rear panel of the calibrator includes ventilation holes power cord socket with fuse mains voltage selector mains switch IEEE 488 c
69. ssary Select function TIMER in UUT and set up requested time interval Switch output terminals of the M191 ON by pushing the button OUTPUT ON Green LED starts to light M191 goes over to STANDBY This statue is signalized with the label in right upper corner of the display In STANDBY mode the calibrator is waiting for test voltage Minimum guaranteed valid test voltage which can be caught by the calibrator is 100 VDC When valid test voltage is identified on the output terminals the calibrator goes over to RUNNING statue In this mode calibrator counts time for which the valid test voltage is attached to the output terminals Calibrator displays current time interval and current test voltage When the test voltage is disconnected by UUT calibrator stops operation goes over to statue OFF disconnect output terminals and hold value of measured time interval and maximum test voltage which has been detected during the period Fig 8 Timer mode OFF G Compare M191 time interval reading to on the UUT preset time Notes Do not disconnect connection between UUT and M191 calibrator otherwise the measured values are not valid User Manual v20 17 M191 Insulation Tester Calibrator MEATEST s r o Be aware that the test voltage for high resistance measurements is dangerous and can cause electric shock Test leads delivered with the calibrator are approved for application up to 5kVDC Use test leads delivered with UUTs for higher
70. tage of the DC High voltage source Compare with the limits in the table Tab V DC voltage verification Disconnect standard multimeter Connect DC High voltage source directly to H L output terminals of the M191 calibrator Set DC output voltage according to table Tab V Compare M191 calibrator DC voltage indication with min max limits in the table Tab V If necessary check DC output voltage using standard DC voltage divider and standard voltmeter to improve accuracy of the source DC current verification Connect process calibrator to the H L M191 output terminals set DCI function Set function SHORT in M191 calibrator Set DC current values in the process calibrator according to the table Tab V Compare reading of the DC current indicated by M191 calibrator with min max limits in the table Tab V Capacitance verification Connect standard RCL meter to the H L M191 output terminals set tset frequency 120 Hz Set function HVC in M191 calibrator Set capacitance values according to the table Tab V Compare reading of the RCL meter with min max limits in the table Tab V User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator Function Range Nominal Standard unit Parameter Test method Limit Limit max min DM 10 02KQ DM 20 04K0 DM 3008 DM DM SS 200 2 1 Q Q 400 4kQ 500 8 TOMA Mioma 202M9 HVR 10MQ 8 008MQ Q 1
71. tion Tester Calibrator Notes When in SHORT mode grounding of the L front panel terminal is always set to ON L terminal is connected to protection earth potential Typical short current of UUTs megaohmmeters is several mA max 47 High voltage capacitance In High voltage capacitance function HVC the calibrator enables to connect to the output terminals one of three high voltage capacitors which are built in the calibrator Sense of the capacitance function is to offer tool for calibration of those megaohmmeters and insulation testers which can measure also capacitance The calibrator is equipped with 3 capacitors with nominal values 10 50 100 nF Maximum test voltage is 5 000 VDC When in HVC mode the display shows information as follows Fig 10 High capacitance mode Calibration value of the selected capacitor Vmax Maximum allowed DC test voltage Test voltage To the output terminals currently connected test voltage Accuracy of the set capacitance in 90 Operating procedure A Connect UUT to the output terminals Use only test leads with guaranteed isolation according to test voltage range of UUT Use test leads delivered with UUT whenever it is possible B Select HVC mode pushing repeatedly FUNCTION UP or FUNCTION DOWN button until HVC label appears on the display Set nominal value of the requested capacitor in nF using numerical keyboard and confirm by ENTER button Calibration value of the se
72. tput terminals can be set up STANDBY Calibrator is waiting in this mode for test voltage from UUT to start simulation sequence When presence of the test voltage is recognized calibrator goes over to RUNNING mode RUNNING Calibrator simulation sequence has been launched Calibrator switches the setup resistances to the output terminals in preset time intervals When the sequence is finished calibrator stays in RUNNING mode until the output terminals are disconnected using OUTPUT ON OFF button During running mode currently applied test voltage and total elapsed time are displayed In PSP mode the display shows information as follows OFF state Fig 12 Programming the PSP mode Preset time points t1 t2 t3 in which the overswitching is executed 22 User Manual v20 MEATEST s r o M191 Insulation Tester Calibrator Preset resistances RO R1 R2 R3 which are connected to the output terminals in time points 0 11 t2 t3 Test voltage Reading of currently applied DC test voltage is displayed Total time The time which has been elapsed after the starting RUNNING sequence Accuracy of actually connected resistance in 90 Be aware that the test voltage for high resistance measurements is dangerous and can cause electric shock Notes Test leads delivered with the calibrator are approved for application up to 5kVDC Use test leads delivered with UUTs for higher test voltages Time sequence Following dra
73. while all other bits are set to 0 SAF QUES ENAB Returns the value of the Questionable Data Enable register as a decimal value STATus QUES COND Description STATus PRES Description This query command returns the content of Questionable Condition register It is a decimal value which corresponds to the binaryweighted sum of all bits set in the register The register is not cleared after this query The response to the query therefore represents an instantaneous Snapshot of the register state at the time that the query was accepted This query command clears all bits in the Operation Data Enable register and in the Questionable Data Enable register Using IEEE 488 2 Common Commands The following commands are common to the IEEE 488 2 standard A summary of the Calibrator s IEEE Common Commands are listed in Table XIV IDN Description This query command returns the manufacturer s name model number serial number and firmware revision of the Calibrator The reply is formatted as follows MEATEST M191 xxxxxx 1 00 Where xxxxxx is serial number Description OPC Description WAI Description RST Description TST Description STB Description SRE value Description 50 This command sets the OPC bit in the ESR Event Status Register when all pending operations are complete This command returns 1 to the output queue after all pending operations are complete
74. wing shows meaning and way of influence of the parameters ti and Ri RUNNING mode RUNNING mode RUNNING mode RUNNING mode Input terminals Input terminals Input terminals Input terminals switched on RO switched on R1 switched on R2 switched on R3 resistance is resistance is connected resistance is resistance is connected Calibrator Calibrator counts time connected Calibrator connected counts first time interval t2 counts time interval Calibrator is in RUNNING mode R Q until output terminlas are disconnected R ag STANDBY mode t s R1 resistance is selected Input terminals are switched on RUNNING mode 1 Test voltage from UUT is identified Calibrator starts to count time Fig 13 Time sequence in PSP mode Operating procedure A Connect UUT to the output terminals Use only test leads with guaranteed isolation according to test voltage range of UUT Use test leads delivered with UUT whenever it is possible User Manual v20 23 M191 Insulation Tester Calibrator MEATEST s r o B 24 Select PSP mode pushing repeatedly FUNCTION UP or FUNCTION DOWN button until PSP label appears on the display Use rotary button to select a requested time point t1 t2 t3 or resistance value RO R1 R2 R3 Write requested time period using the numerical keypad and push ENTER button or rotary button to confirm Write requested resistance value using the numerical keypad and range buttons
75. x V V V V V V V H lt lt VA HVR VA HVR VA HVR User Manual v20 35 M191 Insulation Tester Calibrator MEATEST s r o fst source p NEN HP3458A DC High voltage 10000V LE 99560 Ld 005GQ source multimeter HP3458A 10GQ 10GQ DC High voltage 10000V 9 95GQ 10 05GQ source multimeter HP3458A 100GQ 10060 DC High voltage 10000V 98 0GQ 102 0GQ source multimeter HP3458A DC High voltage 10000V source multimeter HP3458A 500V DC High voltage 100MQ 487 5V 512 5V source multimeter HP3458A standard DC voltage divider 10000V 1000V DC High voltage 100MQ source multimeter HP3458A standard DC voltage divider 3970V 4030V 9940V 10060V DMPC DMPC Z lt 10000V 2000V DC High voltage 100MQ source multimeter HP3458A standard DC voltage divider 10000V 4000V DC High voltage 100MQ source multimeter HP3458A standard DC voltage divider 10000V 10000V DC High voltage 100MQ source multimeter HP3458A standard DC voltage divider DC Sm im Process calibrator Sm 2mA Process calibrator DC mA Sm esce MEC C lo ESELA J lt lt TOn 21209 Tab V Verification test 150pF 300pF DM direct measurement using standard multimeter two wire connection DC test voltage is given by standard multimeter for positions ROO to R37 Z DM HVM direct measurement using standard multimeter two w

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