Sanwa PDR302, Инструкция по эксплуатации

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4. Measurement of Leakage Voltage Using the ACV
1. Once connections have been made, turn the range switch “ACV.”
2. The pointer responds if there is any earth voltage present to indicate
leakage AC current flowing into the earth circuit. The red 0 〜 30 V
scale reads it.
3. If the scale reads above 5 V, there will be interference with earth
resistance measurement. In this case, before taking measurement,
open either the power circuit, the equipment using the earth, or its
earth circuit to reduce the effect of the voltage leak.
4. Earth voltage can be checked independently across E and P
(S)
without using the C
(H)
terminal.
5. Replacing the Batteries
1. When the batteries are low, the power indicator lamp (ON) starts
blinking after the MEASURE PUSH switch is pressed. When this
happens, replace the batteries with new ones. Refer to Fig.4 for
replacing the batteries.
1. Never attempt to supply voltage over 30 V — the maximum
allowable voltage — since the ACV of this unit uses leakage
AC voltage (ground voltage).
2. Never supply standard commercial voltage (AC 100 V for
example).
E
P C
Rx
rE
Earth resistance to be measured: Rx
Rx = R
E
– rE
Connect to a point with known earth resistance
Meter reading R
E
C
(H)
terminal connection cord (red)
Fig.3
WARNINGS
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