ACTIVE TRANSMITTER AND RELATIVE HUMIDITY HYGROSTAT HD 2017T, Merk : DeltaOhm[Aug. 13, 2009 1:52:21]
Specification
DescriptionThe HD 2017T... is an active 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. The selection is made by means of a jumper. Linearisation, 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. 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 ² 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 âERRâ (error) indication if the humidity sensor is not inserted, not calibrated or faulty. 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 energised or de-energised status of the relay.Important note: the relative humidity sensor can work in the temperature range -40...+150°C. Outside this range it can work till +180°C for brief periods or in special execution.
Technical data (@ 20°C and 24Vac)Relative humidity input
Sensor model MK 33
Capacity 300pF typ.
Accuracy at 20°C ±2% (5...90%)±2.5% (in the remaining field)
Relative humidity work range 5...98%R.H.
Probe temperature work range -40...+150°C
Cable length TC Version = 1.5 m, 5 m or 10 m
Sensor maximum static working pressure 20 bar
During use, check the compatibility of the sensor with the atmosphere in which it is installed
Temperature compensation KTY sensor (1K© @ 25°C) -40...+150°C
Calibration Recognition of the value of the saturated solutions - temperature range 10...50°C
Transmitted signal output 4...20mA 0...1V 0...20mA 0...10V 0...100%R.H. 22mA (The display indicates âERRâ) In case of incorrect programming,probe disconnected or not calibrated.
Linearisation Digital
Current output Load resistance d 500©
Voltage output Load resistance e 100K©
Alimentazione Voltage 24Vac ±10%, 50...60Hz (on request 115Vac and 230Vac)
Absorption 3VA
Power supply Resistive 3A / 230Vac (resistive load)
Inductive 1.5A / 230Vac (inductive load)
Responsetime (*) Without filter 6 seconds With filter 3 minutes
Electronics working temperature -20...+70°C
Housing Degree of protection IP65
Order codes
HD 2017 TO/1: active transmitter and relative humidity hygrostat with display, output 0...20mA, 4...20mA, 0...1V or 0...10V. Horizontal fixed probe for channel installation L=130 mm.
HD 2017 TV: active transmitter and relative humidity hygrostat with display, output 0...20mA, 4...20mA, 0...1V or 0...10V. Vertical fixed probe for wall installation.
HD 2017 TC/1: active transmitter and relative humidity hygrostat with display, output 0...20mA, 4...20mA, 0...1V or 0...10V. Probe L=130 mm for direct connection to the instrument with a cable L=1.5 metres.
HD 2017 TC/2-5: active transmitter and relative humidity hygrostat with display, output 0...20mA, 4...20mA, 0...1V or 0...10V. Probe L=330 mm for direct connection to the instrument with a cable L=5 metres.
HD 2017 TC/2-10: active transmitter and relative humidity hygrostat with display, output 0...20mA, 4...20mA, 0...1V or 0...10V. Probe L=330 mm for direct connection to the instrument with a cable L=10 metres.
HD75: saturated salt solution 75% R.H. with adapter M 12x1
HD33: saturated salt solution 33% R.H. with adapter M 12x1
HD9008.21.1: holder for vertical sensor, wall distance 250mm, hole à 26. Use with reduction HD9008.26.14
HD9008.21.2: holder for vertical sensor, wall distance 125mm, hole à 26. Use with reduction HD9008.26.14
HD9008.26/14: reduction for à 26 and à 14mm holes, for HD9008.21.1 and HD9008.21.2
HD9008.31: flange with sensor block à 14mm for duct sensors of the series TC and TO.
