Operation; Display Functions; Online Help - Gossen MetraWatt GEOHM C Manual De Instrucciones

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.
GMC-I Messtechnik GmbH
LED Functions
LED lights Measuring Func-
Significance
up red tion
U /U Interference Interference voltage in the soil
Stör noise
voltage to be measured exceeds the
maximum value which can be
compensated for by the earth
tester.
Netz/Mains Voltage Line voltage is present.
LIMIT Earthing R is greater than the
E
resistance selected limit value.
R > max Probe Resistance exceeded at the
S
resistance external current circuit.
during Cause: open circuit, poor
power-up connection between test
cable and auxiliary earth elec-
R > max Auxiliary earth
H
trode or high resistance in the
electrode
ground in proximity to the
resistance
auxiliary earth electrode
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.
i
Ð
Press the key to query online help.
Press any key to exit the help function.
Remedy
Wait until the interference voltage
clears on its own, or insert the test
spike at a different location.
Check the limit value, improve earthing.
– Reposition the spike
– Moisten the soil around the auxiliary
earth electrode
– Use an auxiliary spike
15