A is a water solubility coecient. Vaisala uses this standard value in all of its oil
moisture transmitters. You can also use this equation with an oil-specific
coecient if it has been determined for your oil.
2.4 Notes for normal operation
In normal operation, the DGA monitor performs measurement cycles automatically without
any operator involvement. Integration with a SCADA system is recommended for convenient
monitoring of measurement results and system status. Status LEDs on the cabinet door
indicate system status on a general level, and detailed status is available from the browser-
based user interface.
For successful operation:
• Keep the doors of the DGA monitor cabinets closed and locked during normal operation.
This keeps the inside of the DGA monitor clean and the measurement environment stable.
• Keep the measurement running continuously to achieve the best measurement
performance.
• If the DGA monitor will be unpowered for a long time (due to a transformer maintenance,
for example), set the system to Standby.
• Check that the power supply unit (OPTPSU) is on and that it is installed as instructed in
OPT100 Installation Guide (M211857EN).
More information
‣
Stopping measurement (page 74)
Chapter 2 – Product overview
15
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