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The transmitters
measure
Relative humidity (% RH),
the sensor temperature (TC), and calculate the wet bulb temperature (WT),
the dew point temperature (DP),
the
absolute humidity (gr/m3) and the mixing ratio (gr/kg - grams of water per
kg of dry air).
The temperatures are express seed in degrees Celsius.
The measurements refer to an atmospheric pressure of 1013.25 mBar.
Once the physical quantity to be checked has been selected, the output
current will be proportional and the status of the relays will depend on
that variable.
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| Relative Humidity
Input |
| Capacity |
390...570 pF |
| Transducer energizing |
10 kHz |
| Cable length |
<10 m multiple screen (about 2 nF)
additional error about 0.003 pF/pF |
| Accuracy |
Instrument: 0.1% of reading ±1 digit
±0.01%/°C
Sensor: ±2.5% (5...90%), +3/-2.5% (90...98%) |
| Sensor work range |
-30...+130°C |
| During use, check that
the sensor is compatible with the atmosphere used |
| Temperature Input |
| 2/4 wires Pt100 |
-50...+199.9°C |
| Transducer energizing |
0.5 mA DC |
| Cable length |
<10 m not screened
<50 m screened (about 5 nF) |
| Accuracy |
0.2°C ±0.1% of reading ±0.01°C/°C |
| Output Current A and B |
| 4.00...20.00 mA |
Dry bulb temperature
-50.0...+199.9°C
Wet bulb temperature -50.0...+199.9°C
Dew point temperature -50.0...+199.9°C
Relative humidity 0.0...+100.0% RH
Absolute humidity 0.0...+1999 gr/m3
Mixing ratio 0.0...+1999 gr/Kg of air |
| Accuracy |
±2.5% RH
0.5% of reading ±0.02 mA |
| Relay outputs |
| A and B |
Bistable exchange contacts 3 A/230 V
ac potential
free contact |
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Version:
DO9861TV1: Vertical fixed probe L=150 mm.
DO9861TO2: Horizontal probe L=350 mm, sliding joint.
DO9861TC1-2: Probe L=150 mm, cable L=2 meters.
DO9861TC2-5: Probe L=350 mm, sliding joint, cable L=5 meters.
DO9861TC2-10: Probe L=350 mm, sliding joint, cable L=10 meters.
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