Eaton MGR10 User manual

SEFELEC REFERENCE PENT0060
Operating manual MGR10 - English

MGR10 A/B/C - Revision : I (for 7.0 software revision) 2
WARRANTY:
SEFELEC warrants that units are free from defects in material and workmanship.
SEFELEC warrants also that, when properly used, that units will perform 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 Lognes.
Changes in the unit not approved by SEFELEC will cancel this warranty.
SEFELEC will not be liable for any indirect damages resulting of the use of the
unit.
This warranty is in lieu of all other warranties.

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Table of Contents
SECTION 1. INTRODUCTION ..............................................................................................................................................5
1.1 OVERVIEW...................................................................................................................................................................6
1.2 Definitions and terminology............................................................................................................................................8
1.3 Principles of measurement...............................................................................................................................................8
1.4 MGR10 and MGR10A technical specifications .............................................................................................................9
1.4.1 Measurement Accuracy.........................................................................................................................................9
1.4.2 Programmable current...........................................................................................................................................9
1.4.3 Accuracy against current level .............................................................................................................................9
1.5 MGR10B technical specifications ................................................................................................................................10
1.5.1 Measurement Accuracy.......................................................................................................................................10
1.5.2 Programmable current.........................................................................................................................................10
1.5.3 Accuracy against current level ...........................................................................................................................10
1.6 MGR10C technical specifications ................................................................................................................................11
1.6.1 Measurement Accuracy.......................................................................................................................................11
1.6.2 Programmable current.........................................................................................................................................11
1.7 Common specification to all model numbers ...............................................................................................................12
1.7.1 Temperature compensation .................................................................................................................................12
1.7.2 Lead resistance......................................................................................................................................................12
1.7.3 Mains supply .........................................................................................................................................................12
1.7.7 Operating conditions :.........................................................................................................................................13
1.7.8 Weight and Size :..................................................................................................................................................13
SECTION 2 : SETTING UP THE MGR10.............................................................................................................................14
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 About the MGR10 Display screen................................................................................................................................18
3.6 About the function keys.................................................................................................................................................19
SECTION 4 : SETTING UP MEASUREMENT PARAMETERS.........................................................................................21
4.1 Range Selection............................................................................................................................................................21
4.2 Current Selection..........................................................................................................................................................22
4.3 Measurement Mode ......................................................................................................................................................23
4.4 Temperature Compensation..........................................................................................................................................28
4.5 Limits............................................................................................................................................................................31
4.6 Data Logging Function.................................................................................................................................................33
4.7 General setup menu ......................................................................................................................................................36
4.8 Measure/Hold function.................................................................................................................................................40
4.9 Measure Stop Function.................................................................................................................................................41
4.10 ZERO Function...........................................................................................................................................................41
SECTION 5 : MEASURING WITH THE MGR10.................................................................................................................42
5.1 Connecting to the MGR10............................................................................................................................................42
5.2 Connecting to the resistance .........................................................................................................................................43
5.3 Resistance measurement...............................................................................................................................................44
5.4 Resistance measurement with temperature compensation............................................................................................44
5.5 Measurement with Limits.............................................................................................................................................45
SECTION 6 :REMOTE CONTROL INTERFACE................................................................................................................47
6-1 PLC remote control ( option MGR10-02).....................................................................................................................47
6-1-1 Unit setup :............................................................................................................................................................47
6-1- 2 Contact specifications :.......................................................................................................................................47
6-1-3 Logical states definition :.....................................................................................................................................48
6-1- 4 Connection :.........................................................................................................................................................48

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6-1- 6 How to trigger a measurement : .......................................................................................................................51
6-1-7 Analog output :.....................................................................................................................................................51
6.2 RS232 and IEEE488 PROGRAMMING INTERFACES :...........................................................................................53
6.2.1 RS-232 SERIAL INTERFACE ( option MGR10-01 ).......................................................................................53
6.2.1.1 Connection...............................................................................................................................................................53
6.2.1.2 Front Panel Set-up ...................................................................................................................................................54
6.2.2 IEEE-488 PARALLEL INTERFACE (OPTION MGR10-06).........................................................................56
6.2.2.1 Connection...............................................................................................................................................................56
6.2.2.2 Front Panel Set-up ...................................................................................................................................................56
6.2.2.3 Interface Functions ..................................................................................................................................................57
6.2.2.4 Single Wire Interface Messages..............................................................................................................................58
6.2.2.5 Multiwire Interface Messages (ATN True) .............................................................................................................60
6.2.2.6 Device Dependent Messages (ATN False).............................................................................................................62
6.3 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 Commands ........................................................................................................................................77
6.3.6 Status Reporting Commands ......................................................................................................................................79
6.3.7 RS-232 Interface Commands......................................................................................................................................87
6.3.8 Front Panel Operations ...............................................................................................................................................87
APPENDIX I : RS-232/IEEE-488 COMMAND SUMMARY .......................................................................................88
APPENDIX II : RS-232 Pin Connections........................................................................................................................93
APPENDIX III : IEEE-488 Pin Connections ..................................................................................................................94
APPENDIX IV : RS232 demo programme .....................................................................................................................95
APPENDIX V : IEEE488 for National Instrument demo programme ...........................................................................99
SECTION 7 : ACCESSORIES..............................................................................................................................................105
7.1 LEADS .......................................................................................................................................................................105
7.2 OPTIONS ...................................................................................................................................................................105
SECTION 8: MAINTENANCE AND CALIBRATION.......................................................................................................106
8.1 PRELIMINARY.........................................................................................................................................................106
8.2 INSTRUMENT RETURN..........................................................................................................................................106
8.3 MAINTENANCE.......................................................................................................................................................106
8.4 CLEANING................................................................................................................................................................107
8.5 CALIBRATION.......................................................................................................................................................1076

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SECTION 1. INTRODUCTION
Warning : This unit must be used by qualified people. Every precautions for the
use of units connected to the main must be taken during its use. In particular, this
unit must be connected to earth.
The specifications of this manual, the correct operation of the unit 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 without written
agreement from SEFELEC company.
In case of use under other conditions than the one specified in this manual, the security of the
user will be in danger.
MEANING OF THE DIFFERENT SYMBOLS ON THE INSTRUMENT
Warning (See document attached)
Warning, risk of electric chock.
DC voltage.
AC and DC voltages.
AC voltage.
Earth connection.

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1.1 OVERVIEW
The MGR10 Microhmmeter is a high accuracy instrument designed for industrial and laboratory
resistance measurements.
Features include:
Programmable measuring current user selectable in 100 steps
Temperature Compensation
Hi/Lo Limits with red/green front panel warning Pass/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 statistical results
Advanced functions include data logging and statistical reporting with max/min, average
values peak to peak values and standard deviation
Analogue output, IEEE-488 and RS232 communication, and PLC interfaces available for
automated monitoring and controlling applications
Rear panel terminals available as an option

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The MGR10 is a true four wire measuring instrument eliminating the need to compensate for lead
resistance. The measured value is displayed in large characters with decimal point and units k, ,
or m. For maximum accuracy the measuring current may be automatically reversed and the
average of measurement displayed. For measurements on unstable samples, a rolling average filter
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 current
selected.
The front panel measurement connections are made via 4mm sockets located on the front panel
(rear panel connection is an option). The connection to a Pt100 temperature sensor is made with a
standard DIN connector.
Available models :
Model Description
MGR10 Basic unit
MGR10A Basic unit with batteries power
MGR10B Basic unit for NFC93050 contact resistance measurement
MGR10C Basic unit for pyrotechnic measurement

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1.2 Definitions and terminology
Standard features of the MGR10 Microhmmeter include:
Direct display of resistance
Illuminated display
Up to 10 Amps measuring current (programmable)
Temperature compensation
Display hold function
Display zero function
4000 event data logger
Statistical reporting
Measuring 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 using the +I and -I leads across the
unknown resistance to be measured. This current also passes through a stable and accurate internal
standard. The volt drop across the unknown resistance is then measured together with the volt drop
across the internal standard, the ratio of these two measurements is then computed and displayed on
the front panel.

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1.4 MGR10 and MGR10A technical specifications
1.4.1 Measurement Accuracy
Range Max. Current Resolution Accuracy at full rated current Temp. Coefficient
30 k100A 1±(0.03%Rdg+0.02%FS) 50 ppm
3 k1mA 100m±(0.03%Rdg+0.01%FS) 50 ppm
30010mA 10m±(0.03%Rdg+0.01%FS) 50 ppm
30100mA 1m±(0.03%Rdg+0.01%FS) 50 ppm
31A 100 ±(0.03%Rdg+0.01%FS) 50 ppm
200m10A 10 ±(0.03%Rdg+0.01%FS) 50 ppm
30m10A 1 ±(0.03%Rdg+0.01%FS) 50 ppm
3m10A 100n±(0.03%Rdg+0.02%FS) 50 ppm
The accuracy is quoted at full rated current in SLOW measurement speed and the display count
is 30,000 plus sign and unit.
FS = Full Scale
1.4.2 Programmable 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 1mA
31A 100mA 10mA
200m10A 1A 100mA
30m10A 1A 100mA
3m10A 1A 100mA
The accuracy of current is ±0.1% .
Open circuit voltage is 5 V +/-5%
1.4.3 Accuracy against current level
Range 100% Current 50% Current 10% Current
30 k±(0.03%Rdg+0.02%FS) ±(0.04%Rdg+0.02%FS) ±(0.05Rdg+0.02%FS)
3 k±(0.03%Rdg+0.01%FS) ±(0.04Rdg+0.01%FS) ±(0.05Rdg+0.01%FS)
300±(0.03%Rdg+0.01%FS) ±(0.04Rdg+0.01%FS) ±(0.05Rdg+0.01%FS)
30±(0.03%Rdg+0.01%FS) ±(0.04Rdg+0.01%FS) ±(0.05Rdg+0.01%FS)
3±(0.03%Rdg+0.01%FS) ±(0.04Rdg+0.01%FS) ±(0.05Rdg+0.01%FS)
200m±(0.03%Rdg+0.01%FS) ±(0.04Rdg+0.01%FS) ±(0.05Rdg+0.01%FS)
30m±(0.03%Rdg+0.01%FS) ±(0.04Rdg+0.01%FS) ±(0.05Rdg+0.01%FS)
3m±(0.03%Rdg+0.02%FS) ±(0.04Rdg+0.02%FS) ±(0.05Rdg+0.02%FS)

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1.5 MGR10B technical specifications
1.5.1 Measurement Accuracy
Range Max. Current Resolution Accuracy at full rated current Temp. Coefficient
30 k100A 1±(0.03%Rdg+0.02%FS) 50 ppm
3 k1mA 100m±(0.03%Rdg+0.01%FS) 50 ppm
30010mA 10m±(0.03%Rdg+0.01%FS) 50 ppm
30100mA 1m±(0.03%Rdg+0.01%FS) 50 ppm
3100mA 100 ±(0.05%Rdg+0.01%FS) 50 ppm
200m100mA 10 ±(0.05%Rdg+0.01%FS) 50 ppm
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
1.5.2 Programmable 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 1mA
3100mA 10mA 1mA
200m100mA 10mA 1mA
30mNot available
3mNot available
The accuracy of current is ±0.1% .
Open circuit voltage is 5 V +/-5% . Can be limited to 20 or 50 mV to comply with NFC93050
1.5.3 Accuracy against current level
Range 100% Current 50% Current 10% Current
30 k±(0.03%Rdg+0.02%FS) ±(0.04%Rdg+0.02%FS) ±(0.05Rdg+0.02%FS)
3 k±(0.03%Rdg+0.01%FS) ±(0.04Rdg+0.01%FS) ±(0.05Rdg+0.01%FS)
300±(0.03%Rdg+0.01%FS) ±(0.04Rdg+0.01%FS) ±(0.05Rdg+0.01%FS)
30±(0.03%Rdg+0.01%FS) ±(0.04Rdg+0.01%FS) ±(0.05Rdg+0.01%FS)
3±(0.05%Rdg+0.01%FS) ±(0.06Rdg+0.01%FS) ±(0.07Rdg+0.01%FS)
200m±(0.05%Rdg+0.01%FS) ±(0.06Rdg+0.01%FS) ±(0.07Rdg+0.01%FS)
30mNot available
3mNot available

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1.6 MGR10C technical specifications
1.6.1 Measurement Accuracy
Range Max. Current Resolution Accuracy at full rated current Temp. Coefficient
30 k10A 1±(0.05%Rdg+0.02%FS) 50 ppm
3 k0,1mA 100m±(0.05%Rdg+0.01%FS) 50 ppm
3001mA 10m±(0.05%Rdg+0.01%FS) 50 ppm
3010mA 1m±(0.05%Rdg+0.01%FS) 50 ppm
310mA 100 ±(0.05%Rdg+0.01%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 current
The measurement current is not adjustable on each resistance range
Range Max Current Min Current Steps
30 k10

A 10

A Not available
3 k100

A 100

A Not available
3001mA 1mA Not available
3010mA 10mA Not available
310mA 10mA Not available
200mNot available
30mNot available
3mNot available
The accuracy of the current is ±1% .
Open circuit voltage is 2 V +/-5% .

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1.7 Common specification to all model numbers
1.7.1 Temperature compensation
The accuracy of the temperature measurement is ±0.1% and uses a standard Pt100 sensor. This
accuracy does not include errors due to the sensor itself. The temperature measurement range is
0…+40C and the resistance measurement is referenced to 20C when this option is used.
Accuracy of the MGR10-04 sensor : +/- ( 0.2% + 1°C)
1.7.2 Lead resistance
A maximum lead resistance of 0.5 / Imes ( = 0.05for 10A and 500for 1mA ) is
permissible in each of the four measuring leads.
1.7.3 Mains supply
Universal power inlet
Mains : 115/230V~ 10% single phase 47 to 63 Hz.
Power consumption : 40VA without load, 70 VA 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 batteries used are 5Ah, and the following performance can be expected from
fully charged batteries:
oDigital :11 hours continuous use, with backlight on, and IEEE and PLC cards
fitted.
oAnalogue: Over 6000 simple measurements in FAST mode, using 10A
measuring current. (Or approximately 3000 measurements using SLOW
mode).
The battery condition is constantly monitored, and if it is low, a warning symbol is displayed .In
this situation operate as follows :
Connect a mains cable on the unit rear mains socket
Connect the mains cable on the mains
Switch the rear panel switch in the ON position
The FAST red Led lamp should light on to indicate the battery charging mode
When the red Led lights off , the charge is over

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1.7.7 Operating conditions :
The instrument must be used inside, in horizontal position or on tripode.
Temperature :
In storage : -10°C to +60°C.
In operation : 0°C to +45°C.
Accuracy is rated 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 kg mains version
: 12 kg mains and battery version
Over voltage category :
CAT II.
Rate of pollution :
Pollution 2 : Occasional conductive pollution only by condensation.
Safety class :
Class I instrument : Earth protection by mains connection.

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SECTION 2 : SETTING UP THE MGR10
2.1 Safety information
Please read and follow these important safety instructions:
Read the safety information at the beginning of this manual before operating the MGR10;
Make the necessary electrical safety connection checks. In particular, select the correct line voltage
and make sure that the correct fuse is installed. Incorrect voltage or fuse selection present both an
electrical safety and 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 used, and connected only to a mains supply with a suitable earth connection. Under no
circumstance should the equipment be operated with earth disconnected.
2.2 Unpacking the instrument
When you unpack the MGR10, check that the following items are present before starting to use the
unit:
1 x MGR10 Microhmmeter
1 x Mains Cord
1 x Operating manual
1 x Calibration Certificate
Please contact the Sefelec Customer Support Team immediately if any of these items are missing or
damaged.

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SECTION 3 : ABOUT THE MGR10
This section introduces you to the features and functions of the MGR10 Microhmmeter
3.1 The Front Panel
3.2 ON/OFF Switch
The On/Off switch switches the MGR10 on and 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 measurements and programming facilities are accessed through the function keypad.
A brief description of key functions is given in the following table. For a detailed description of
how to use the keys to configure and operate the MGR10, refer to section 5.

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3.4 Summary of basic functions
Key
Symbol Description Function Direct function
or menu
Selection of Range
3mSelects 3mrange Selects and displays the measured value
using the 3mrange Direct
from
keypad
30mSelects 30mrange Selects and displays the measured value
using the 30mrange Direct
from
keypad
200mSelects 200m
range Selects and displays the measured value using the 200mrange 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 Direct
from
keypad
300Selects 300range Selects and displays the measured value
using the 300range Direct
from
keypad
3kSelects 3krange Selects and displays the measured value
using the 3krange Direct
from
keypad
30kSelects 30krange Selects and displays the measured value
using the 30krange Direct
from
keypad
Auto selects autorange The instrument will select the optimum
range required and display the measured
value
Direct
from
keypad

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Setting up measurement options
CURR Current selection Selects the current to be used for
measurement plus single polarity or
switched average
Menu
COMP Temperature
compensation Selects temperature compensation Menu
ZERO Measurement
display zero
function
Nulls the display at the current 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 Measure stop/start Stops the current measurement and
disconnects the measurement current Direct from
keypad
LOG Data logging
function Selects the data logging and statistical analysis menu functions Menu
LIMIT Limit functions Selects Hi/Lo limit menu Menu
MENU Menu functions Selects interface options and calibration
functions Menu

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3.5 About the MGR10 Display screen
The liquid crystal graphic display clearly indicates the measured resistance and measurement status as
well as displaying available menu options and measurement analysis when selected.
Figure 3.5.1 - Example of Resistance Measurement Mode
The keypad below the display screen controls the MGR10. Some keys perform a function 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 configuration mode is indicated on the screen by a
dashed line displayed directly below the main reading. An instruction prompt under the dashed line
indicates the current menu. The available menu options are displayed on the bottom row of the display
as shown in figure 3.5. Press the corresponding function key to select an option.
AUTO1: 30m10.0A (AVE) Slow
+ 18.000 m
T= +20.0C (EXT) R20= 18.006m(Cu)
Meas Cont
0
3m

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Figure 3.5.2 Example of current mode menu
The lines printed on the front panel helps you to link the menu option printed on the screen 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; these instances are covered later in this section. Both rows of
function keys are shown in figure 3.#
Figure 3.6.1 - Function keys
AUTO1: 30m10.0A (AVE) Slow
+ 18.000 m
----------------------------------------------------------------------------------------
Powr
+I -I Ave Mode Mag Quit

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The [Quit] and [OK] menu options consistently use the following keys.
Use the [Quit] key to leave a menu or return to the Resistance Measurement mode screen. Use the
[OK] key to confirm a particular choice and continue to the next set 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 displayed to zero.
The rest of this section describes each key in detail and gives examples of how to configure the
measurement to your requirements.
The last used set up conditions are stored when the instrument is turned off and restored upon
switch on.
Quit
3k
OK
30k
5
ZERO
ZERO