AEMC 6418, Руководство пользователя

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Clamp-On Ground Tester Model 6418
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2.5. ERRORS
During the measurement, the instrument reports any errors.
Display of the NOISE symbol during the impedance
measurement indicates that the current (>5A) or voltage
(ZxI> 25V) is too high, making the accuracy of the
displayed measurement uncertain.
When the current exceeds 10A, the impedance
measurement is not displayed (dashes appear in the
measurement field).
When the impedance measurement is >1200Ω, the
instrument displays OR .
When the current measurement is >20A, the
instrument so indicates.
When the impedance measurement is <1Ω, the display
alternately indicates the measured value and LOOP ,
indicating the value is very low for a valid ground
impedance measurement and most likely indicates the
measurement is through a wire loop rather than through
the earth.
2.6. AUTOMATIC STOP
After 5 minutes of inactivity, the instrument enters to standby mode.
Press any key or turn the switch to any setting to exit standby. The
instrument restarts without repeating the calibration procedure if it has not
been on standby for more than 15 minutes. It is possible to disable
automatic standby; refer to §2.4 (STOP menu). The symbol is then
displayed.