Gossen MetraWatt GEOHM C Mode D'emploi page 66

Electrical Safety
Safety Class II per IEC 61010-1
Operating Voltage 250 V
Test Voltage 2.3 kV
Measuring Category 250 V CAT II
Fouling Factor 2
Fuse F0.1H250V
Electromagnetic
Compatibility (EMC) IEC 61326-1/EN 61326-1
Data Interface
Type infrared interface (SIR/IrDa)
bidirectional, half-duplex
Format 9600 baud, 1 start bit, 1 stop bit, 8 data bits,
no parity, no handshake
Range max. 10 cm, recommended distance: < 4 cm
Mechanical Design
Display dot matrix: 64 x 128 pixels, illuminated
Dimensions 275 mm x 140 mm x 65 mm
(without measurement cables)
Weight approx. 1.2 kg with batteries
Protection housing: IP 54 per EN 60529
with pressure compensating diaphragm made of
microporous ePTFE, non-aging, dia. 8 mm in battery
compartment cover
Extract of table on the meaning of IP codes
IP XY Protection against
st
(1 digit X) foreign object entry
0 not protected
≥ 50.0 mm ∅
1
≥ 12.5 mm ∅
2
≥ 2.5 mm ∅
3
≥ 1.0 mm ∅
4
5 dust protected
6 dust-tight
30
IP XY Protection against the pene-
nd
(2 digit Y) tration of water
0 not protected
1 vertically falling drops
vertically falling drops with en-
2
closure tilted 15°
3 spraying water
4 splashing water
5 water jets
6 powerful water jets
Display Values including Allowances for Measuring Error
Table for the determination of maximum display values for low earth resis-
tances by making allowances for the tester's measuring error:
Maximum
Limit Value
Display Value
1.00 Ω 0.84 Ω
2.00 Ω 1.74 Ω
5.00 Ω 4.44 Ω
10.0 Ω 8.94 Ω
20.0 Ω 17.4 Ω
Maximum
Limit Value
Display Value
50.0 Ω 44.4 Ω
100 Ω 89.4 Ω
500 Ω 444 Ω
894 Ω
1.00 kΩ
5.00 kΩ 4.44 kΩ
GMC-I Messtechnik GmbH