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ACTIVE
HUMIDITY TEMPERATURE TRANSMITTER
HYGROSTAT |
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Active Temperature
and Relative Humidity Transmitter Hygrostat with digital Display |
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HD2017T…Digital active
humidity transmitter and HYGROSTAT.
Measuring range: 5...98%R.H., working temperature range of sensor
-40...150°C.
Temperature drift correction of R.H. sensor; outputs 0...20 mA, 4...20
mA, 0...1Vdc or 0...10Vdc can
be selected. LCD value display.
Act as HUMIDIFICATION and DEHUMIDIFICATION regulator, free potential
contact relay.
Programming and calibration by the keyboard. Power supply 24Vac, on
request 230Vac.
The HD 2017T... is an active temperature, relative humidity transmitter and microprocessor controlled
relative humidity hygrostat with display of the value detected by the
sensor and display of the parameters during programming. The transmitter
converts the humidity value into a linear current or voltage signal.
The
outputs available are in current 0...20mA or 4...20mA and in voltage
0...1V or 0...10V.
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Active temperature, relative humidity
transmitter |
The selection is
made by means of a jumper. Linearization, with a digital technique, allows
excellent precision and stability to be obtained.
The absence of trimmers, potentiometers, etc. makes instrument calibration
very simple: it requires only operation on the keyboard without having to
open the instrument.
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The humidity input can be recalibrated using two saturated solution: the first with 75%R.H., the second with 33%R.H.
The relative humidity range 0%R.H...100%R.H. is fixed: depending on the
solution used, the value 0%R.H. corresponds to 0mA, 4mA or 0V, while
100%R.H. corresponds to 20mA, 1V or 10V.
Temperature compensation of the humidity measurement is obtained with a
sensor in the probe.
The  symbol on the display flashes if the probe
temperature is lower than -50°C, higher than +150°C
or if the temperature sensor is broken.
Likewise, the display gives an 'ERR' (error) indication if the humidity
sensor is not inserted, not calibrated or faulty.
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The HD 2017T... also acts as an
ON/OFF regulator for humidification or dehumidification: for this reason it is
provided with a relay with a free potential contact at output.
A LED on the front panel of the instrument indicates the energized or
unenergized status of the relay.
Important note: the relative humidity sensor can work in the
temperature range -40...+150°C.
Outside this range the data are not correct and the sensor may be spoilt.
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