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MGR10 A/B/C - Revision : I (for 7.0 software revision)

44

5.3 Resistance measurement

The MGR10 should be in the measurement

[STOP]

mode. In this mode the measuring current is

switched off and the current terminals are shorted internally. Connect the measuring leads as described
in section 5.2, before starting the measurement select the current level and mode required as described
in section 4.2

WARNING : the maximum measuring current is 10 Amps on the lowest 3 measuring ranges
ensure that the current level selected will not damage the resistance being measured.

Select the range required see 4.1 or auto range.

To start the measurement press the

[MEAS]

button the measured resistance value will be displayed on

the screen.

5.4 Resistance measurement with temperature compensation

Temperature compensation should be used when measuring the resistance of materials which have
a high temperature coefficient. Copper, for example, has a temperature coefficient of 3.80%/K.
The value of the resistance measured will therefore vary with the temperature of the copper. To
obtain consistent and meaningful results, the resistance values may be related to a set ambient
temperature, normally 20



C.

Example

: Copper with a temperature coefficient of 3980ppm/k = 0.3980%/k

Temperature

20



C 25



C 30



C 35



C

Resistance of Copper

18.000 m



18.358

m



18.716

m



19.075

m



% Increase in resistance

0%

1.99%

3.98%

5.97%

To measure with the temperature compensation, proceed as in 5.2.4 but in addition connect the
temperature sensor probe to the front panel socket. Select the temperature compensation
measurement mode as described in 4.4. Alternatively, if the ambient temperature is stable, a manual
value may be entered, in this case a temperature sensor is not required. The compensated resistance
value will be displayed in large digits on the MGR10 screen and the measured value will be shown
in smaller digits below the main display. The measured or set temperature will also be shown.

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Содержание MGR10

Страница 1: ...SEFELEC REFERENCE PENT0060 Operating manual MGR10 English...

Страница 2: ...m in accordance with specifications of this manual If within one year after original delivery it is found not to meet this standard it will be repaired at no charge in SEFELEC service facility in Logn...

Страница 3: ...4 2 1 Safety information 14 2 2 Unpacking the instrument 14 SECTION 3 ABOUT THE MGR10 15 3 1 The Front Panel 15 3 2 ON OFF Switch 15 3 3 The Function Keypad 15 3 4 Summary of basic functions 16 3 5 Ab...

Страница 4: ...3 PROGRAMMING THE RS 232 IEEE INTERFACES 63 6 3 1 Introduction 63 6 3 2 Configuration Measurement Commands 66 6 3 3 Data Operation Commands 72 6 3 4 Other function Commands 75 6 3 5 System Related Co...

Страница 5: ...as well as the operator s security are guaranteed only when the supplied accessories are used The measurement probes can include limitation or protective elements therefore it is forbidden to modify w...

Страница 6: ...s Fail lamps Switched current mode with automatic averaging ensures elimination of thermal emf errors Large graphic LCD display for resistance measurement values as well as configuration settings and...

Страница 7: ...r is available Resistance measurement accuracy is typically 0 03 1 year specification and the value may be displayed with or without temperature compensation the final accuracy depends upon the curren...

Страница 8: ...uring current reversal Hi Lo Limits with Red Green front panel warning LEDs Digital filter for smoothing display 1 3 Principles of measurement The MGR10 generates a constant current which is connected...

Страница 9: ...grammable current The measurement current is adjustable on each resistance range as follows Range Max Current Min Current Steps 30 k 100 A 10 A 1 A 3 k 1mA 100 A 10 A 300 10mA 1mA 100 A 30 100mA 10mA...

Страница 10: ...rement current is adjustable on each resistance range as follows Range Max Current Min Current Steps 30 k 100 A 10 A 1 A 3 k 1mA 100 A 10 A 300 10mA 1mA 100 A 30 100mA 10mA 1mA 3 100mA 10mA 1mA 200m 1...

Страница 11: ...1 FS 50 ppm 200m Not available 30m Not available 3m Not available The accuracy is quoted at full rated current and the display count is 30 000 plus sign and unit FS Full Scale 1 6 2 Programmable curre...

Страница 12: ...maximum Switching from 115 to 230 volts by switch in the line input plug Temporized fuse protective in rear panel 2AT for 230V 4AT for 110V Battery powered with built in charger MGR10A version The two...

Страница 13: ...after half an hour of warm up and for a relative humidity 50 Altitude up to 2000 meters Max humidity rate 80 for a temperature of 31 C 1 7 8 Weight and Size Size 131 x 339 x 324 mm H W D Weight 9 8 k...

Страница 14: ...a fire hazard Ensure that the rear panel fan is operating and that the vent is not blocked When connecting to an electrical supply mains supply the mains cord provided with the equipment should be us...

Страница 15: ...off During Power On the last measurement function setup is restored The rear mounted cooling fan will always run and the cooling vent must not be blocked 3 3 The Function Keypad All MGR10 measurement...

Страница 16: ...e Direct from keypad 3 Selects 3 range Selects and displays the measured value using the 3 range Direct from keypad 30 Selects 30 range Selects and displays the measured value using the 30 range Direc...

Страница 17: ...rrent reading and displays measured values relative to the null value Direct from keypad MES Measure run hold Display hold function triggers measurement and data logger cycles Direct from keypad STOP...

Страница 18: ...directly For example selects 3m range Other keys switch the display to configuration mode which allows you to select options through a series of menus The option menus all follow the same format The...

Страница 19: ...n with the correct key on the keypad 3 6 About the function keys The top row of function keys are only used to select menu options The lower row of function keys is enabled only when entering values t...

Страница 20: ...of menu options Not all function keys are used to access the Configuration Mode Some just invoke the function which is printed on the key For example pressing immediately sets the measured value disp...

Страница 21: ...p left hand side of the display Auto range is selected using AUTO key This key toggles the selected function as follows AUTO1 auto ranges starting with the highest range AUTO2 auto ranges starting wit...

Страница 22: ...rage mode are displayed on the top line of the LCD screen Mag Press on Mag to change the current intensity as a percentage between 10 and 100 of the maximum value Press on Chg to modify the current va...

Страница 23: ...ct a resistance display in Ohms per kilometer Press on No to modify the number of cable connected in series or parallel o Enter a number between 1 and 99 with the numeric keypad o Press on OK to enter...

Страница 24: ...o Press on OK to enter the value Press on Res to modify the resistor per distance unity km or meter o Enter the value according to unity with the numeric keypad o Press on OK to enter the value Press...

Страница 25: ...MGR10 A B C Revision I for 7 0 software revision 25...

Страница 26: ...e a display with large characters and with a rate of 2 measurements per second which gives the best resolution and accuracy Press on Med to activate a display with large characters and with a rate of...

Страница 27: ...igger mode and the above description assumes this However if CONTINUOUS trigger mode is used then the operation is the same except that once the measurement has settled the settling facility is effect...

Страница 28: ...ode references all values back to a temperature of 20 C The true resistance value measured will be displayed in large digits in the center of the display and the compensated resistance will be display...

Страница 29: ...m C Or press on User to select a coefficient which can be defined by the operator Press on Chg to modify the coefficient value in ppm C Use the keyboard to enter the new coefficient value Press on OK...

Страница 30: ...ion mode the compensated value of the resistance is displayed with big characters and the true value is displayed with small characters Figure 4 4 1 Measurement screen with temperature compensation AU...

Страница 31: ...arm Press on On to activate the audible signal when measurement result fails Or press on Off to cancel the audible alarm Press on OK to go back to the previous page Press on Max to set the maximum val...

Страница 32: ...t or lower than the Min limit set The MGR10 screen will also display PASS or FAILED with to show value to high and to show value to low Figure 4 5 1 Measurement screen with limits O C To select the op...

Страница 33: ...m Press again on Yes and the existing log will be cleared The operator is now ready to set the values for the new logging Rev Press on Rev to review the current readings stored in the log these will b...

Страница 34: ...tween 1 and 4000 by using the numeric keypad Press on OK to enter the value Press on OK to go back to the previous page On Press On to activate the data logging mode Press on Quit to escape the menu T...

Страница 35: ...the logging press the MES key the measurements will start and the values stored In the CONTINUOUS trigger mode once the set number of values has been stored in the log the measurements will be stopped...

Страница 36: ...trol menu Press RCL to recall an existing memory number Enter the memory number between 0 and 9 with the numeric keypad the parameters are immediately loaded in the unit operating memory Press STO to...

Страница 37: ...l when pressing a key Press on On to set the audible signal Press on Off to reset the audible signal Press OK to go back to the previous page Press on Time Date to set the date and time Press Chg to s...

Страница 38: ...n OK to enter the value Press on OK to go back to the previous page Press on IEEE to select the parallel interface A message OPTION NOT AVAILABLE will be displayed if the unit is not equipped with thi...

Страница 39: ...ontrol to the MGR10 functions is done on 3 levels All access to all the functions Mem access only to parameters memories and to measurement trigger Meas access only to measurement trigger MES MEAS key...

Страница 40: ...LD state NOTA this state doesn t interrupt the measurement current the current continue to flow through the specimen under test Press again on MES to resume the memorization of the last measured value...

Страница 41: ...and internally shorts the current terminals discharging any voltage that may be stored in capacitors 4 10 ZERO Function Press ZERO to null the current display reading to zero all subsequent measureme...

Страница 42: ...measurement which eliminates errors due to lead resistance The measuring leads plug into the four front panel safety sockets The sockets are marked U U I I Connections to the resistance to be measured...

Страница 43: ...onnections which connect the test resistor to the current supply circuit Connect the red leads to the U and I sockets and the black leads to the U and I sockets Connect to the resistance under test as...

Страница 44: ...high temperature coefficient Copper for example has a temperature coefficient of 3 80 K The value of the resistance measured will therefore vary with the temperature of the copper To obtain consistent...

Страница 45: ...limit boundaries then front panel green pass LED will illuminate If the measured value falls outside the set limits then the red fail LED will light a warning beeper will also sound and the instrument...

Страница 46: ...MGR10 A B C Revision I for 7 0 software revision 46 Figure 4 2 7 Measurement display with limits value to high AUTO1 30m 10 0A AVE SLOW 9 620 m 5 0000 m HI 9 000 m Meas Sing...

Страница 47: ...4 5 chapter The remaining parameters measurement range current must be set according to the specimen under test Store the configuration in a memory location by using the MENU key then MEM and then ST...

Страница 48: ...it rear panel 1 Not connected 2 0 Volt 3 25 Volts DC protected by internal fuse 1AT 4 Input for PLC option CTRLIN 5 Input for PLC option N1 6 Input for PLC option N3 7 Input for PLC option MES_DCH 8 O...

Страница 49: ...evision 49 In case of connection with a PLC system or any other relay control system make sure to use shielded wire with braid connected to the metallic cover of Sub D connector connection at 360 shie...

Страница 50: ...put binary coded data lines for the number of the parameters set N3 N2 N1 N0 Memory 0 0 0 0 0 0 0 0 1 1 0 0 1 0 2 1 0 0 1 9 CTRLOUT output acknowledgment of the CTRLIN signal EOT output the contact of...

Страница 51: ...DCH signal goes low At the end of each measurement the EOT output signal goes high to indicate the measurement cycle end and that the PASS FAIL HIGH et FAIL LOW signal are enabled If an error occurs d...

Страница 52: ...MGR10 A B C Revision I for 7 0 software revision 52 PLC SYSTEME MGR10 MGR10 02 PLC option connection when using the internal power supply...

Страница 53: ...menu All interface connectors are accessible on the rear panel The RS 232 interface requires Ver 2 0 software or higher The IEEE 488 interface requires Ver 3 0 software or higher The PLC interface req...

Страница 54: ...verflow and subsequent characters may be lost Always use a time delay between transmitted characters or better still use the full 5 wire connection for reliable hardware handshaking of each character...

Страница 55: ...Baud rate Pressing OK sets the chosen rate Pressing Quit leaves it unchanged Valid rates are 75 110 150 300 600 1200 2400 4800 9600 19200 Baud These set the Baud rate for both transmit and receive The...

Страница 56: ...Select ON to set the Talk Only mode In this mode the interface will ignore all incoming interface commands and the instrument will remain in LOCAL control mode The result of each measurement is sent t...

Страница 57: ...ddressing is not implemented L3 Listener Capability The device can act as a basic listener can be set to listen only mode becomes unaddressed if MTA sent LE0 Extended Listener Capability Extended list...

Страница 58: ...are tri state outputs except SRQ NRFD and NDAC which are open collector 6 2 2 4 Single Wire Interface Messages The IEEE bus consists of 8 data lines 5 General Interface Management Lines and 3 Handshak...

Страница 59: ...rial Poll the idle state All devices must monitor IFC at all times and respond within 100uS minimum pulse width for IFC EOI End Or Identify When ATN is true the EOI line is used by a controller to exe...

Страница 60: ...Mode Sending either GET or TRG will make the microhmmeter perform the INITiate command and take a measurement The command must be sent as a single message Sending either GET or TRG within a command s...

Страница 61: ...UNL Unlisten This unaddresses all current listeners on the bus Single listeners cannot be unaddressed without unaddressing all listeners It is necessary that this command be used to guarantee that onl...

Страница 62: ...be Serial Polled will return a Status Byte requires Talker subset to the controller to indicate their status under program control The controller sequentially polls each individual device on the inter...

Страница 63: ...All new command lines automatically start at the root level For the microhmmeter a colon must not be sent as the first character This is treated as a non recognised character and the command error bi...

Страница 64: ...ay These commands are primarily concerned with control reset self test and status Command Syntax Most command keywords have both a long and short form The bus controller can send commands in either fo...

Страница 65: ...e Input Data Format Numeric data sent to the instrument should be in Ohms or degrees unless stated otherwise The value can be in any standard scientific format e g 3KOHM can be sent as 3000 3E3 3 000...

Страница 66: ...next command message Input Buffer The instrument receives messages into an input buffer and only starts executing commands after receipt of a message terminator The buffer can store up to 100 characte...

Страница 67: ...top range first AUTO2 Autorange2 last used range first AUTO1 and AUTO2 are not available in FAST mode nor if Open Circuit Limiting is enabled The 3KOHM and 30KOHM ranges are also not available if Open...

Страница 68: ...MGR10 A B C Revision I for 7 0 software revision 68 autorange AUTO OFF AUTO1 AUTO2...

Страница 69: ...SOURce CURRent magnitude current mode Sets the measuring current magnitude and mode according to the following parameters The current measurement is aborted magnitude 10 100 current mode I I AVE AVE...

Страница 70: ...ssage if in Fast mode Selecting Filter on Average Current or Fast mode will automatically deselect the Settling facility Trigger Measure Group These commands trigger measurements and allow the results...

Страница 71: ...etting to OFF means that any subsequent READ or INIT followed by FETCh will take one reading and send it to the output buffer If set to ON the microhmmeter will perform continuous measurements which w...

Страница 72: ...TAlogger STATe ON OFF or 1 0 Enables or disables the datalog function When turned on triggering is controlled by STARt STOP and STEP and all readings are sent to the datalog memory DATAlogger STATe Re...

Страница 73: ...the letter T if Temperature Compensation was used DATAlogger POINts Returns the number of readings actually stored in the datalog memory The response will be between 0 and COUNt CALCulate DATA Group...

Страница 74: ...limit The value is in Ohms 0 30 000 CALCulate LIMit LOWer Returns the lower measurement limit in Ohms CALCulate LIMit UPPer value Sets the upper measurement limit The value is in Ohms 0 30 000 CALCula...

Страница 75: ...or MAN manual temperature SENSe TCOMpensate COEFficient CU AL or USER user coefficient Sets the temperature coefficient to Copper Aluminium or to a user defined value which is entered in ppm C 0 9999...

Страница 76: ...0 20 50 Sets the open circuit limit to OFF 20mV or 50mV Open Circuit Limits are not available if the 3KOHM or 30KOHM range is selected Attempting to set 20mV or 50mV state will generate an execution e...

Страница 77: ...ON SYSTem VERSion Queries the SCPI version to which the instrument conforms The MGR10 is not compliant and returns the message NOT SCPI COMPLIANT SYSTem TIME hh mm ss Set the system clock time Use 24...

Страница 78: ...t conditions that are forced are Range 30KOHM AUTO1 Current 100 I Read Rate SLOW Trigger Mode CONT OFF Single STOP Measurement Limits OFF Alarm ON Lower Limit 0 Upper Limit 30K Filter OFF 10 readings...

Страница 79: ...mask which allows any of the bits from the Event Register to set the appropriate bit in the Status Byte Setting an enable bit to 1 enables the event bit clearing the enable bit inhibits the correspond...

Страница 80: ...dition Event Enable Bit Register Reg Reg 0 0 0 0 Temperature 0 0 0 0 Resistance 0 Below Lower Limit Above Upper Limit 0 0 0 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 0 0 Measuring 0 0 0 Measurement 0...

Страница 81: ...bove Upper Limit bit 12 This bit is set when the limits facility is on and the last measurement was greater than the upper limit The following commands are used to access these registers STATus QUESti...

Страница 82: ...e either an out of context command or an out of range parameter The command is ignored Command Error bit 5 This bit is set when the command line is not recognised by the parser This could be an invali...

Страница 83: ...nstrument returns a binary weighted decimal value representing the bits set in the enable register Status Byte Registers The Status Byte Register contains summary bits from the Questionable Data Stand...

Страница 84: ...Enable Register or by the CLS common command Request for Service Master Summary Status bit 6 The meaning of this bit depends on how the Status Byte Register is read This works for IEEE only the bit is...

Страница 85: ...ompleted the state returns to idle and the Operation Complete bit 0 is set The command should only be used in conjunction with non query commands and is only available for IEEE If the OPC is sent in R...

Страница 86: ...a service request on completion of the logging function The following command sequence can be used SRE 16 Enables the Message Available bit to trigger a service request CLS Clears the Message Availab...

Страница 87: ...any other command These commands will produce a command error in IEEE mode The commands are ignored 6 3 8 Front Panel Operations The currently selected interface is indicated by the RS 232 or IEEE le...

Страница 88: ...Only GTL Go To Local SDC Selective Device Clear GET Group Execute Trigger DCL Device Clear SPE Serial Poll Enable SPD Serial Poll Disable MLA My Listen Address UNL Unlisten MTA My Talk Address UNT Unt...

Страница 89: ...ITiate CONTinuous ON OFF or 0 1 INITiate CONTinuous READ FRESistance TEMPerature TCOMpensate ABORt Data Operation Commands DATAlogger CLEAr COUNt No of readings COUNt STATe ON OFF or 1 0 STATe STARt S...

Страница 90: ...MODE TCOMpensate COEFficient CU AL or USER user coefficient TCOMpensate COEFficient UNIT TEMPerature C CEL F FAR TEMPerature Filter Averaging Commands SENSe AVERage STATe ON OFF or 1 0 AVERage STATe...

Страница 91: ...N RST TST WAI Status Reporting Commands STATus QUEStionable CONDition QUEStionable EVENt QUEStionable ENABle enable value QUEStionable ENABle ESR ESE enable value ESE STATus OPERation CONDition OPERat...

Страница 92: ...MGR10 A B C Revision I for 7 0 software revision 92 RS 232 Interface Commands SYSTem LOCal REMote...

Страница 93: ...ound 6 DSR Data Set Ready not connected 7 RTS Request To Send output 8 CTS Clear To Send input 9 RI Ring Indicator not connected PC 25 pin female PC 9 pin female MGR10 9 pin male 8 1 Not used 1 3 2 Co...

Страница 94: ...EOI End Or Identify 6 DAV Data Valid 7 NRFD Not Ready For Data 8 NDAC Not Data Accepted 9 IFC Interface Clear 10 SRQ Service Request 11 ATN Attention 12 CABLE SHIELD 13 DIO5 Data Input Output 5 14 DIO...

Страница 95: ...1 9600 N 8 1 CS2000 DS2000 CD0 FOR RANDOM AS 1 port 1 GOTO suite vitrs3 PRINT Port RS232 n 2 s lectionn OPEN COM2 9600 N 8 1 CS2000 DS2000 CD0 FOR RANDOM AS 1 port 2 suite ON COM port GOSUB INTERUPTIO...

Страница 96: ...yer envoi PRINT 1 A RETURN traitement des interruptions RS232C INTERUPTIONRS COM port OFF nochr 0 char INPUT 1 1 LINE INPUT 1 msg msg char msg char INPUT 1 1 eom 1 COM port ON RETURN traitement des SR...

Страница 97: ...NT R sultat de l identification msg A tst GOSUB envoi GOSUB ATTENTEMSG commande type common query PRINT R sultat de l autotest msg RETURN CONFIG IF AUTORUN 0 THEN CLS COM port ON A disp brig off GOSUB...

Страница 98: ...0 software revision 98 IF fin 1 THEN RETURN PRINT Cycle no i A read GOSUB envoi GOSUB ATTENTEMSG PRINT R sistance msg Ohm NEXT i tmes TIMER tini PRINT PRINT Temps de cycle total tmes PRINT Temps moye...

Страница 99: ...en the second parameter of the function IBONL is zero the software and hardware are disabled Execution of this program is terminated after the call to the function IBONL to disable the software and ha...

Страница 100: ...113 GOSUB 6000 title 114 fin 1 115 IF fin 0 THEN 199 ELSE GOTO 115 120 GOSUB 200 keys off 122 KEY 1 IDN 130 KEY 2 TEST 140 KEY 3 LEARN 144 KEY 4 CODE 146 KEY 5 148 KEY 6 RESIST 154 KEY 8 END 160 ON K...

Страница 101: ...320 PRINT Esr val 550 RETURN boucle de tempo t3 valeur en secondes tempo 600 t TIMER 610 WHILE t 0 t2 TIMER IF t2 t t3 THEN t 0 620 WEND 630 RETURN touche de fin 700 BEEP PRINT The test is going to s...

Страница 102: ...ers val 4220 RETURN IDN function 5000 CLS 5010 mes idn GOSUB 300 GOSUB 320 5020 PRINT val idn val 5030 IF LEN val 37 THEN num MID val 19 2 ELSE num MID val 19 3 5130 RETURN test function 5500 CLS 5510...

Страница 103: ...le IBSTA will also be printed in hexadecimal along with the mnemonic meaning of the bit position The status variable IBERR will be printed in decimal along with the mnemonic meaning of the decimal val...

Страница 104: ...s Ctrlr IF IBERR EABO THEN PRINT EABO Op aborted IF IBERR ENEB THEN PRINT ENEB No GPIB board IF IBERR EOIP THEN PRINT EOIP Async I O in prg IF IBERR ECAP THEN PRINT ECAP No capability IF IBERR EFSO TH...

Страница 105: ...tractable metallic tip probe TE80 2 wires probe with 1 5 meters cable length and remote control system CO183 2 wires continuity measurement lead with 4 mm diameter banana plugs and crocodile clip CO18...

Страница 106: ...to protect it from damage 8 3 MAINTENANCE Our units don t need particular maintenance except an annual calibration If problems please follow the brief check list here after If the problem continues c...

Страница 107: ...be performed by qualified people having the complete procedure as well as correctly checked standards Our Maintenance department is at your service to perform the annual calibration Nevertheless if y...

Страница 108: ...efficient and safe power is available when it s needed most With unparalleledknowledgeofelectricalpowermanagmentacross industries experts at eaton deliver customized integrated solutions to solve our...

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