AEMC 6471 - Misconnection

Ground Resistance Tester Model 6471 75
CHAPTER 10
TROUBLESHOOTING
10.1 Error Reporting
10.1.1 Electrode Resistance Too High
This can happen in a 3- or 4-pole earth measurement, a resistivity measurement,
or an earth potential measurement.
This message is displayed when the measurement is triggered by a short press of
the START/STOP button and the resistances of the auxiliary electrodes are too high.
The measurement must then be started by a long press on the START/STOP but-
ton. The device then measures the values of the electrodes and compensates for
them to display the correct result.
10.1.2 Out of Range
<
>
or
The ashing > or < symbol indicates the measurement is
out of range.
<
>
and
If both symbols ash together, it means that the accuracy
of the value displayed is outside of the instrument
specication or is subject to large uctuations. Activating
the smoothing function (SMOOTH) may correct this.
Press the 2nd button, then the SMOOTH button to activate
smoothing.
10.1.3 Misconnection
H
S
ES
E
This ashing indicates that a terminal or a
current clamp needs to be either connect-
ed or disconnected. You must correct the
connections or the measurement will not
proceed. The ashing of terminal H may
also indicate that current I
H-E
is too low. The
ashing of terminal S may also indicate that
resistance R
S
is too high. The ashing of
terminal ES may also indicate that the cur-
rent I
ES
measured by the clamp is too low.
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