Operating Instructions

Page 7 of 20
Drawing : - TPC245
Issue : - 1
Date : - 13/10/03
4.4 Venting
The chamber must have a venting unit to avoid the chamber overheating. This
venting unit is controlled by the BC2000 HAT (see manual). The “Vent” lamp
indicates when the vent is operation. The vent unit pulls in external cold air
and blows out humid air. This in turn reduces the temperature inside the
chamber.
4.5 Humidification (Temperature & Humidity sensor
applications)
When drying delicate species e.g. oak, a spraying facility is absolutely
necessary.
This equipment ensures the relative humidity in the chamber does not fall
below the required humidity level. The humidification is controlled by the
BC2000 HT (see operating manual). The “Humidify” control lamp indicates
when humidification is operational.
The control sequence allows only “heating on” or “humidification on”, never
both. When the required humidity is reached heating up will start again.
These regulations are programmed and cannot be changed
4.6 Measuring of chamber humidity (relative humidity) and
temperature
The FD100 has a temperature sensor. Chamber temperature is taken by a
NTC-resistor. If the chamber has a temperature/humidity sensor then the
humidity is taken by a hair-hygrometer (change of length through humidity).
These signals are transferred into °C and % relative humidity.
4.7 Measuring wood humidity
The moisture content is based on measuring the electrical resistance of the
wood that has to be dried. The control unit starts to take the data at certain
intervals and calculates the resistance into % wood humidity.