16
hygrotest 600
Technical data
Outputs can be scaled
Pressure tightness
of probe: 4 bar (DHT 20/120 / PHT
20/120), at +10 to +40°C
Vacuumtightness
of probe: Approx. 0.5 bar (DHT 20/
120 / PHT 20/120)
The other types are designed for atmospheric
conditions.
Electrically isolated
outputs: Humidity and temperature
(WHT, DHT, PHT only )
Power supply: 24 V DC (10 to 30 V DC)
Max. load without
display: At 10 V, 100 Ohm
At 18 to 30 V, 500 Ohm
Max. load with
display H1: 20 to 30 V, 50 Ohm
Power supply with
display H1: At least 20 V
Reaction time: t90 approx. 10 to 20 s
We recommend an
integration time of 1s
in the case of very quick
analog recorders or PLC
inputs.
Temperature resistance
Probe and cable: 120 °C (DHT 20/120 /
PHT 20/120)
70 °C (WH, WHT 20/70,
DH, DHT 20/70, PHT 20/70)
EMC: according Guidline 89/336
EEC
Probe material: Polycarbonate(PC)
except with DHT 20/120 /
PHT 20/120, here 1.4571
stainless steel is used.
All data referring to a rated temperature +25°C.
Warranty 2 years
Housing:
Material: ABS, grey colour RAL 7035
Dimensions: 130 x 105 (140) x 52 mm
Humidity sensor: Testo sensor
plugged in with:
DHT 20/+120°C and
PHT 20/+120°C
With other types the sensor is
soldered
Temp. sensor NTC
plugged in with:
DHT 20/+120°C and
PHT 20/+120°C
With other types the sensor is
soldered
Screw connections: 2 x M 16 x 1.5
Ambient temp.: 0 to +70 °C
Storage temp.: 40 to +80 °C
Protection class: IP 65
Measuring ranges:
Humidity: 0 to 100% RH
Temperature: 20 to +70 °C (WHT 20/70/
DHT 20/70 / PHT 20/70
20 to +120 °C
(DHT 20/120 /PHT 20/120)
Temp. coefficient: 0.05%RH/°C for temp.
deviating from 25°C
Accuracy
Humidity: ±2% RH (0 to 90 %RH)
±3% RH (90 to 100 %RH)
Accuracy
Temperature: ±0.3 °C (20 to +50 °C)
1.5% of reading >50 °C
Analog outputs:
Humidity
Resolution: 0.02 mA
Accuracy: 0.04 mA
Drift: 0.001 mA/°C
Temperature
Resolution: 0.02 mA
Accuracy: 0.04 mA
Drift: 0.003 mA/°C
Humidity and
temperature: 4 to 20 mA in 2 wire
technology (WHT, DHT, PHT
only)
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