User 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 DATA: display memory, “freeze measured value”
4 STORE: memory mode active
5 FILTER: low-pass filter active
6 IR: infrared interface indicator
7 Bluetooth interface control display
8 Auxiliary display: digital display with decimal point and polarity display
9 Transformation ratio (factor for current sensor and transformer clamps)
10 dB: alternating voltage level measurement
11 Selected type of current
12 TRMS measurement
13 Unit of Measure
14 Warning regarding dangerous voltage: U > 45 V AC/DC
15
Main display
: digital display with decimal point and polarity display
16 Continuity test with acoustic signal active
17 Pt100/Pt1000: selected platinum resistance sensor with automatic recog-
nition of Pt100/Pt1000
18 TC: temperature measurement with type K thermocouple (NiCr-Ni)
19 h (hours): unit of time
20 MAN: manual measuring range selection active
21 ZERO: zero balancing active
22 REL: relative measurement with reference to offset
23 min: minimum value storage
24 Diode measurement selected
25 max: maximum value storage
26
Stopwatch active or time since beginning of measurement
27 ON: no function here
28 sec (seconds): unit of time
29 Upm : no function here
Battery full
Battery OK
Battery weak
Battery (almost) dead, U < 1.8 V
Data transmissionto / from multimeter active
IR interface in standby mode
(ready to receive starting commands)
Battery Level Indicator
Interface Indicator
1 26
8
13
14
16
4 5
7
3
10
12
9
18
23 262019
17
15
24
11
21 22 25 2728 29
7