Camille Bauer GOSSEN METRAWATT GEOHM C, Руководство по эксплуатации

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GMC-I Messtechnik GmbH 15
5 Operation
5.1 Display Functions
The following items are displayed at the LCD:
•
Measured values with abbreviated designations and units of measure
• The selected function
• Error messages
During measuring sequences which are executed automatically, mea-
sured values are saved and displayed in digital format until the next
measuring sequence is started, or until the instrument is shut down
automatically.
If the upper measuring range limit is exceeded, the upper limit appears in
the display preceded by the “>” symbol (greater than) in order to indicate
over-ranging.
Attention!
!
Earthing resistance measurements are not valid if any of the
following displays indicate the occurrence of an error before or
during measurement, or if low battery voltage is indicated.
LED Functions
5.2 Online Help
Appropriate online help texts can be displayed at the LCD for each of the
basic functions and sub-functions,
after the respective function has been
selected in the corresponding menu .
Ð
Press the key to query online help.
Press any key to exit the help function.
LED lights
up red Measuring Func-
tion
Significance Remedy
U
Stör
/U
noise
Interference
voltage Interference voltage in the soil
to be measured exceeds the
maximum value which can be
compensated for by the earth
tester. Wait until the interference voltage
clears on its own, or insert the test
spike at a different location.
Netz/Mains Voltage Line voltage is present.
LIMIT Earthing
resistance R
E
is greater than the
selected limit value.
Check the limit value, improve earthing.
R
S
> max Probe
resistance
during
power-up Resistance exceeded at the
external current circuit.
Cause: open circuit, poor
connection between test
cable and auxiliary earth elec-
trode or high resistance in the
ground in proximity to the
auxiliary earth electrode – Reposition the spike
– Moisten the soil around the auxiliary
earth electrode
– Use an auxiliary spike
R
H
> max Auxiliary earth
electrode
resistance
i