IFO510 V1.00 4
3 Safety instructions
Before installing the FO 510, read these operating instructions
carefully. Failure to follow the instructions in this manual, in particular
the safety instructions, may result in danger to personnel, equipment
and installations..
•The product may only be used and applied in accordance with its intended use.
•Installation of the dew point sensor (oil humidity sensor) and maintenance work
may only be carried out by trained personnel.
•Installation and service work must be carried out in a de-energized state.
•The applicable safety regulations must be observed!
•Attention: max. pressure range 300 bar must not be exceeded.
•Observe the measuring ranges of the sensor!
Overheating will destroy the sensors.
•Observe the permissible storage and transport temperature as well as the
permissible operating temperature (e.g. protect the measuring device from
direct sunlight).
•Opening the device, improper handling or use of force will void the warranty!
•.
4 Description
The FO 510 enables reliable and long-term stable moisture measurement in technic
Moisture in oil can be measured and expressed in two different ways: as an absolute value
or as a relative value.
•Relative moisture is expressed by water activity (aw). Water activity is a relative
measure of moisture in oil and describes the ratio between the actual amount of
dissolved water in the oil and the maximum amount possible at a given temperature.
An aw value of 0 means that there is no water in the oil, while an aw value of 1
indicates complete saturation. Water activity is independent of the type of oil.
•he absolute moisture content is called water content (x) and expresses the actual
amount of water in the oil, whether it is dissolved, emulsified or separated. Water
content is measured in units such as ppm (parts per million) or mg of water per kg of
oil and is independent of oil temperature. To assess the degree of saturation of the
oil, the water content x must be considered in conjunction with the temperature (T).
The calculation of the water content x from the measured values for aw and T is oil-
specific and requires special parameters for the respective oil. We offer the possibility to
adapt these oil specific parameters for different oil types.
