Recommended Installation Locations - Vaisala MHT410 Guía Rápida

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Recommended Installation Locations

The probe must always be installed in a valve.
Recommendation
Recommended
Possible alternative
Not recommended
6
Description
Straight section in the radiator's outlet pipe.
This is the best location for the transmitter.
The oil is measured in flow, which makes the oil sample
representative and instant. This is essential especially for correct
oil moisture measurement.
Compared to the radiator inlet pipe, oil in the outlet pipe is cooled,
preventing unnecessary heating of the sensors and the
transmitter.
Side of the oil tank, high enough from the bottom to enable proper
oil movement. An instrumentation valve is recommended with
appropriate threads.
This is a typical valve that is meant for oil analysis. Moisture
response time is moderate depending on the oil volume and
transmitter installation.
Severe risk of death and of damage to transformer:
Pay attention to transmitter installation depth and possible
energized parts inside the power transformer to minimize
electric shock hazard and equipment damage.
Drain valve of the oil tank.
The moisture response can be poor due to static oil flow. There is
also a risk of separated water (leading to wrong results) and oil
sludge (risk of sensor contamination and clogged filters).