YOKOGAWA EY200, Руководство пользователя

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9. Before Sending for Service / Calibration cycle
If the instrument does not operate normally, please contact nearby
Yokogawa sales office.
Before returning the instrument follow the trouble-shooting guide
shown below.
If the instrument does not turn on;
Check whether batteries are missing or they are installed
incorrect polarity.
(For details of battery, see 7.Battery Replacement)
Note that batteries were not installed in the instrument at
shipment.
If the display reads 1 . . . in earth voltage measurement;
A voltage exceeding 200V is being applied to the instrument.
Halt the measurement immediately, otherwise the instrument
may be damaged.
#
WARNING
• When measuring earth voltage, do not apply voltage greater
than 200V between measuring terminals.
If the display reads . . . in precise earth resistance measurement;
Stick the auxiliary earth spikes deeper into the earth, or stick
them at other locations; or Add moisture to the part of the earth
where C auxiliary earth spike is stuck (connected with the red
wire); and Short the three test leads and check if the display
indicates a value near 0.00 .
(For details of measuring, see 6-2 Precise Measurement)
If the display reads . . .
in simplified earth resistance measurement;
Check if the connection to a metal water pipes, a common earth
of commercial power supply, etc., is secure; or
Use another metal water pipe, common earth of commercial
power supply, etc.
(For details of measuring, see 6-3 Simplified Measurement)
Calibration cycle
It is recommended that the tester be calibrated once every year
for correct operation.