13
Earth Resistance (EN61557-5)
Operating range compliant with EN61557-5
operating error
Maximum percentage
operating error
5.00~1999Ω
±30%
The influencing variations used for calculating the operating error are denoted as follows;
Temperature : 0
o
C and 35
o
C
Series interference voltage : 3V
Resistance of the probes and auxiliary
earth electrode resistance : 100 x RA, 50kΩ or less
Supply voltage : 8V to 13.8V
5.3 General specification
Instrument dimensions
235 X 136 X 114mm
Instrument weight:-
Reference conditions
1350g (including batteries.)
Specifications are based on the following conditions except
where otherwise stated:-
1. Ambient temperature: 23±5°C:
2. Relative humidity 45% to 75%
3. Position: horizontal
4. AC power source 230V, 50Hz
5. DC power source: 12.0 V, ripple content 1% or less
6. Altitude up to 2000m, Indoor use
Battery type
Eight LR6 or R6 batteries.
Operating temperature
and humidity.
0 to +40°C, relative humidity 80% or less, no condensation
Storage temperature
and humidity
-20 to +60
o
C, relative humidity 75% or less, no condensation.
Display
Dot Matrix LCD 160(W) X 240(H) pixels.
Overload protection
The continuity test circuit is protected by a 0.5A/600V fast
acting (HRC) ceramic fuse mounted in the battery
compartment, where a spare fuse is also stored.
The insulation resistance test circuit is protected by a resistor
against 1000 V AC for 10 seconds.
