User Manual

GMC-I Messtechnik GmbH 3
Table of Contents
Page Page
1 Safety Features and Precautions ...............................4
2 Initial Start-Up ............................................................5
3 Selecting Measuring Functions and Measuring Ranges ......6
3.1 Automatic Measuring Range Selection ..................................... 6
3.2 Manual Measuring Range Selection ......................................... 6
3.3 Quick Measurements .............................................................. 7
4 Triple Digital Display ..................................................7
5 Measured Value Storage ............................................8
5.1 Measured Value Storage – Key Function “DATA”
(Hold/Compare) ...................................................................... 8
6 Saving Minimum and Maximum Values
“MIN/MAX” with Time Stamp .....................................9
7 Voltage and Frequency Measurement ......................10
7.1 Voltage Measurement [V] ...................................................... 10
7.1.1 Zero Balancing in the 3 V DC Measuring Range ...................... 10
7.1.2 Transient Overvoltages .......................................................... 10
7.1.3 Voltage Measurements at Above 600 V .................................. 10
7.2 Frequency Measurement [Hz] ................................................ 11
8 Resistance and Diode Measurements ......................11
8.1 Resistance Measurement (2-wire connection) [] .................. 11
8.1.1 Zero Balancing in the 300  and 3 k Measuring Ranges ..... 11
8.2 Continuity Test during Resistance Measurement .................... 12
8.3 Diode Measurements ........................................................... 12
9 Milliohm Measurement (4-Pole-Measurement) .......13
9.1 Compensation of Cable Resistance ........................................ 13
9.1.1 Measurement with Kelvin Probe KC27 ................................... 13
9.2 Thermovoltage Compensation ................................................ 13
9.3 Milliohm Measurement with 200 mA or 20 mA DC [m] ........ 14
9.4 Milliohm Measurement with 1 A Pulsating Measuring
Current [m@1 A]
(automatic thermovoltage correction in 3  300 m  range) ...........14
10 Temperature Measurement [C] ..............................14
11 Insulation Resistance Measurement [M@...V]
(METRA HIT 27I and METRA HIT H+E
CAR only) ........15
11.1 Preparing for Measurement ................................................... 15
11.2 Insulation Resistance Measurement ....................................... 16
11.3 Ending the Measurement and Discharging .............................. 16
12 Using the Menus – from the Initial InFO Menu to
Operating and Measuring Parameters ..................... 17
12.1 Sampling rAtE ........................................................... 17
12.2 Saving Measured Values ....................................................... 17
12.2.1Memory Mode – DATA Key Function (see also chapter 5.1) ..... 17
12.2.2Memory Mode Operation – STORE Menu Function .................. 18
12.3 Querying Memory Occupancy – INFO  MEMO/OCCUP ......... 18
12.4 Clearing the Memory – MEMO  CLEAr ................................ 18
12.5 Activating the Default Values ................................................. 18
12.6 Transmission Mode Operation with RS 232 Interface .............. 19
13 Characteristic Values ..................................... 22
14 Maintenance ............................................................ 25
14.1 Storage Batteries and Batteries ............................................. 25
14.2 Fuses ................................................................................... 26
14.3 Housing ............................................................................... 26
14.4 Device Return and Environmentally Compatible Disposal ......... 26
15 Multimeter Messages ..............................................26
16 Accessories ............................................................. 27
17 Repair and Replacement Parts Service,
Calibration Center* and Rental Instrument Service . 27
18 Guarantee ................................................................28
19 Product Support ....................................................... 28
20 Recalibration ............................................................ 28