12
2. When measuring and protecting grounding resistance,
you must disconnect power supply. For grounding resistance is
less than 1Ω, you should separately connect it to the grounding
object with special lead, C2 on the outside, P2 in the medial.
Shown in Fig. 4:
3. When measuring grounding resistance of large grounding
grid, the wiring method is different from the general method,
detailed wiring please refer the measurement requirement of
current meter or voltmeter.
4. When measuring grounding resistance, you’d better
measure in different directions for 3 to 4 times and take the
average.
5. The instrument uses AC and DC power supply. When
connect to AC power supply, the instrument will prior use AC
power supply; when not connect to AC power supply, battery
will power tester.
