Capacitive-digital relative humidity probe TRH 20
TRH 20 is a capacitive-digital relative humidity probe with a normalized output current signal of 4 .. 20 mA over 2 wires.
The instrument in a cylindrical housing is designed for wall mounting with the supplied clamp.
The instrument to which the probe is to be connected must be equipped with a 4 ... 20 mA current input. The lower and upper limits of the input must be set for correct indication of the measurement. These limits correspond to the values of 4 mA (lower limit or start of scale) and 20 mA (upper limit or end of scale) to be displayed. The method of setting these limits is given in the operating instructions of the measuring instrument.
The set values for the TRH 20 probe are:
- Lower limit (4 mA) : 0
- Upper limit (20 mA) : 100
| Producer | Ascon Tecnologic |
ELECTRICAL DATA
Power: Power consumption:20mA MAX
Humidity sensor type: capacitive-digital
Max. external load: [(supply voltage. - 8V) / 0.02A] +/- 50 ?
Output signal: 4...20 mA (0 ...100 %RH)
Electric shock protection class: Class III
MECHANICAL DATA
Housing: plastic
Dimensions: D 185 mm, O 20 mm
Weight: approx. 80 g
Mounting: Wall mounting
Connection: non-removable flexible PVC cable 2 x 0,25 mm2 , length 1,5 m.
Enclosure protection: IP 65
Air filter: wire mesh
Operating temperature: -10 ... 70 °C
Operating humidity: 0 ... 100 % relative humidity
Storage temperature: -10 ... 70 °C
FUNCTIONAL DATA
Measuring range: 5 ... 95 %RH (4.8 ... 19.2 mA)
Overall accuracy: +/- 3 % (20 ... 80 %RH) ; +/- 5 % (5 ... 20 , 80 ... 95 %RH) in the absence of pollutants, at 23 °C and air speed 3 m/s.
Response time: 30 s (at 23 °C and 3 m/s air speed).
Compliance with regulations: ECC EMC Directive 2004/108/CE (EN 61326), ECC LV Directive 2006/95/CE (devices operating at 50 V AC and 75 V DC).
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