Operation Manual

GMC-I Messtechnik GmbH 13
Operating Overview – Connections, Keys, Rotary Switch, Symbols
Symbols used in the Digital Display
1 Battery level indicator
2 ON: continuous operation (automatic shutdown deactivated)
3 MAN: manual measuring range selection active
4 Digital display with decimal point and polarity display
5 max/min: Min/Max value storage
6 DATA: display memory, “freeze measured value”
7 STORE: memory mode active
8 ISO: insulation resistance measurement active / selected test voltage
9 1: x current clip factor (transformation ratio)
10 IR: infrared interface display
11 Scale for analog display
12 Pointer for analog display (bar graph – pointer)
triangle appears: indicates overranging
13 Diode measurement selected
14 Selected type of current
15 TRMS measurement
16 Pt100(0): selected platinum resistance thermometer with
automatic recognition of Pt100/Pt1000
17 Type K: temperature measurement with type K (NiCr-Ni) thermocouple
18 sec (seconds): unit of time
19 REL: relative measurement with reference to offset
20 Unit of measure
21 ZERO: zero balancing active
22 Duty Cycle Measurement
(this function only available with customer-specific variant)
23 Warning regarding dangerous voltage: U > 15 V AC or U > 25 V DC
24 Continuity test with acoustic signal active
25 h (hours): unit of time
Battery full
Battery OK
Battery weak
Battery (almost) dead, U < 1.8 V
Data transmission  to /  from the multimeter is active
IR interface in standby mode
(ready to receive starting commands)
Battery level indicator
Interface indicator
1 2910
12
13
14
15
16
20
23
24
765
1921
8
3
11
18
25
4
22
17