7 Operation
Maschinenfabrik Reinhausen GmbH 2019 2035163667/06 EN ETOS
®
IM
To set the DGA monitoring, proceed as follows:
1. Go to Settings > Parameters > DGA monitoring.
2. Select the desired parameter.
3. Set parameter.
4. Press the Accept button to save the modified parameter.
Sensor measuring accuracy
You can use this parameter to enter the sensor measuring accuracy as a
percentage value. When doing so, refer to the sensor operating instructions.
Reset diagnostic errors
This parameter can be used to reset the recorded diagnostic errors for all
dissolved gas analyses. This can be useful after a transformer oil change,
for example.
Rates of increase evaluation interval
You can use this parameter to set the interval for the rate of increase which
is used as the basis for the limit value consideration.
Relative moisture in oil default value
You can use this parameter to enter a value for the transformer moisture in
oil (e.g. from the last oil analysis). This value can be used as a replacement
value if the transformer is not equipped with a sensor for measuring the
moisture in oil, or if the sensor is defective.
Use relative moisture in oil default value
You can use this parameter to activate the replacement value for the relative
moisture in oil. The device will then use the replacement value in all calcula-
tions that use the transformer moisture in oil level. Be aware that these cal-
culations may be less accurate when you use the replacement value and
that the replacement value deviates from the actual value of the transformer
moisture in oil.
Limit values for absolute values
Gas Parameter
Limit 1 Limit 2 Limit 3
H2O (%) H2O> H2O>> H2O>>>
H2 (ppm) H2> H2>> H2>>>
N2 (ppm) N2< N2<< N2<<<
CO (ppm) CO> CO>> CO>>>
CO2 (ppm) CO2> CO2>> CO2>>>
CH4 (ppm) CH4> CH4>> CH4>>>
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