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18
Specification
Fuse
replacement
Possible fuse failure is indicated by the
symbol.
f
For fuse replacement
Remove battery cover as above.
Withdraw fuse and check for failure.
Replace with a fuse type:
1 x 100 mA (F) 250 V 1.5 KA HBC 4 x 20 mm
Preventive maintenance
Test leads should be checked before use to ensure there is no damage.
Ensure batteries are removed if the instrument is left unused for an extended period.
When necessary, the instrument can be cleaned with a damp cloth.
Do not use alcohol based cleaners as these may leave a residue.
ENVIRONMENTAL CONDITION:
Operating ambient
20°C
Humidity
Nominal humidity
CONTINUITY TEST
Test voltage
Compliance Voltage: +4V dc –0% /+10 %
(open circuit)
Test current
Bi-direc200mA -0% + 50mA
(into 2Ω load)
Continuity accuracy resistance:
± 5% ± 3 digits (0 to 19.99 Ω)
Resistance resolution
10 mΩ
Display range
0.01 to 19.99Ω
Test time
User selectable from 2 sec to 20 sec or selected
during test to 180sec
INSULATION TEST
Insulation test
250V dc –0 % /+25 % open circuit
500V dc –0 % /+25 % open circuit
≥ 500V –0% dc across 0.5 MΩ load
Short circuit/charge current
< 2mA dc
Insulation accuracy
±3% ±10 digits (0 to 19.99 MΩ)
Resolution
0.01 MΩ
Display range
0.10 MΩ to 99.99 MΩ
Test duration
User selectable from 2 sec to 20 sec or selected
during test to 180sec
SUBSTITUTE LEAKAGE TEST
Leakage current Accuracy
± 5% ± 3 digits
Test frequency
Nominal mains frequency 50Hz
Test voltage
< 50V ac
Leakage Current Resolution
0.01mA
Display range
0.10 to 19.99mA
Test duration
User selectable from 2 sec to 5 seconds
Reading corrected to 230V ac.
