TEMPERATURE RELATIVE HUMIDITY TRANSMITTER

HD 2011T… Relative Humidity Transmitter. Measuring range 5...98% R.H., sensor temperature working range -40...150°C. Temperature drift correction of R.H. sensor. Outputs: 0...20 mA, 4...20 mA, 0...10Vdc can be selected. Power supply 24Vac, on request 230Vac.
HD 2012T… Dual digital active R.H. and temperature transmitter. R.H. measuring range 5...98%, sensor temperature working range -40...150°C. Temperature drift correction of R.H. sensor.
Configurable temperature measuring range between –50 and 200°C, minimum range 25°C.
Standard configuration 0…100°C. Selecting output for both the channels: 0...20 mA, 4...20 mA, 0...10Vdc can be selected. Power supply 24Vac, on request 230Vac.

The HD 2011T... and HD 2012T... are microprocessor-controlled active humidity and humidity-temperature transmitters.
The temperature range is configurable. These transmitters convert the humidity and temperature values into two linear current or voltage signals. Linearization, with a digital technique, allows excellent precision and stability to be obtained.
Each output of the transmitter may be selected between 0...20mA, 4...20mA or 0...10V and is
set by means of a jumper.

The absence of trimmers, potentiometers, etc. makes instrument calibration very simple:
all that is required is to press a key while a led indicates any abnormal situations.
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.
In the HD 2012 model, the user can set the temperature output in any range in the field
-50...+200°C as long as the minimum amplitude is at least 25°C; a led indicates any
alarm situations (temperature outside the set range, temperature sensor broken or
short circuiting) and assists the user in the programming phase.
Important note: the relative humidity sensor can work in the temperature range
-50...+150°C. Outside this range the data are not correct and the sensor may be spoilt.

Relative Humidity Transmitters Order Codes
HD2011 TO/1: Active relative humidity transmitter, output 0...20mA, 4...20mA
or 0...10V. Horizontal fixed probe for channel installation L=130 mm.
HD2011 TO/2: Active relative humidity transmitter, output 0...20mA, 4...20mA
or 0...10V. Horizontal fixed probe for channel installation L=330 mm.
HD2011 TO/3: Active relative humidity transmitter, output 0...20mA, 4...20mA
or 0...10V. Horizontal fixed probe for channel installation L=530 mm.
HD2011 TV: Active relative humidity transmitter, output 0...20mA, 4...20mA
or 0...10V. Vertical fixed probe for wall installation
HD2011 TC/1: Active relative humidity transmitter, output 0...20mA, 4...20mA
or 0...10V. Probe L=130 mm for direct connection to the instrument with a cable L=1.5 metres.
HD2011 TC/2-5: Active relative humidity transmitter, output 0...20mA, 4...20mA
or 0...10V. Probe L=330 mm for direct connection to the instrument with a cable L=5 metres.
HD2011 TC/2-10: Active relative humidity transmitter, output 0...20mA, 4...20mA or
0...10V. Probe L=330 mm for direct connection to the instrument with a cable L=10 metres.
HD2012 TO/1: Double active relative humidity and temperature transmitter for
channel installation, double output 0...20mA, 4...20mA or 0...10V.
Horizontal fixed probe for channel installation L=130 mm.
HD2012 TO/2: Double active relative humidity and temperature transmitter for
channel installation, double output 0...20mA, 4...20mA or 0...10V.
Horizontal fixed probe for channel installation L=330 mm.
HD2012 TO/3: Double active relative humidity and temperature transmitter for
channel installation, double output 0...20mA, 4...20mA or 0...10V.
Horizontal fixed probe for channel installation L=530 mm.
HD2012 TV: Double active relative humidity and temperature transmitter for
channel installation, double output 0...20mA, 4...20mA or 0...10V.
Vertical fixed probe for wall installation.
HD2012 TC/1: Double active relative humidity and temperature transmitter for
channel installation, double output 0...20mA, 4...20mA or 0...10V.
Probe L=130 mm for direct connection to the instrument with a cable L=1.5 metres.
HD 2012 TC/2-5: Double active relative humidity and temperature transmitter for
channel installation, double output 0...20mA, 4...20mA o 0...10V.
Probe L=330 mm for direct connection to the instrument with a cable L=5 metres.
HD 2012 TC/2-10: Double active relative humidity and temperature transmitter for
channel installation, double output 0...20mA, 4...20mA o 0...10V.
Probe L=330 mm for direct connection to the instrument with a cable L=10 metres.

On request the transmitters can be supplied with voltage output 0...1Vdc or 0...5Vdc.