COSA Xentaur Hygrocontrol Type 83 - Manual (Page 3)

HYGROCONTROL Manual for Type 83 Page - 2 -
1. Fundamental Features of Series 83 Transmitters
HYGROMESS Humidity and Temperature Meters detect relative
Humidity and Temperature. For this purpose the probes are
equipped with a capacity type humidity sensor of very small mass.
The temperature detection is done by a Pt-1000 RTD , which is
placed very close to the humidity sensor to avoid differences in
temperature between the two sensors.
Incoming sensor signals are temperature compensated and
transferred into linearised analogue or digital outputs by digital
electronics. We use a microprocessor for the control of all internal
functions.
The electronics for transmitting the temperature and humidity sensor
signals are built into a IP-65 housing of 80 x 160 x 55 mm.
Two different operational modes may be chosen by the user which
are:
"MEASURING" and "CALIBRATION"
"MEASURING" is the normal mode for picking up humidities and
temperatures, compensating, linearising and transferring the values
to the outputs.
"CALIBRATION" mode is used for recalibration of sensor
characteristics by special prepared LiCl solutions.
2. Preparations before Operating
2.1 Unpacking and Checking
Every instrument has been examined before dispatch in respect to its
electrical and mechanical functions. After receipt of instrument,
please check its operation. In case of any malfunction or damage,
return the instrument with a detailed description of faults.
2.2 Set-up for Operation
The instrument has to be connected to a power supply of 9 to 36
VDC. The correct voltage is marked on the type label you find on one
side of the housing. Do not use voltages other than the marked one!
Severe damage would be the result of applying the wrong voltage.
The cross section of your conductors should meet the dimensions of
0.5 up to 1.5 mm
2 (AWG 16 to AWG 20). You will have to connect
the 2 wires to the terminals marked (+) and (-), the shield should be
connected at the cable gland. Opening of the housing is done by
turning the four screws (quick-release types) with a screwdriver to
the left.