TESTO Hygrotest 600 WHT - 2-Wire Technology Connection Recommendations

9
4 to 20 mA = -20 to
+120°C / +70°C
for WHT/DHT/PHT
Connection suggestions
for 2 wire technology
Current measurement
Option 1:
Option 2:
4
3
2
1
Transmitter
4 to 20 mA = 0 to +100 %RH
24 V
DC
4
3
2
1
Transmitter
4 to 20 mA = -20 to +120°C/+70°C
for WHT/DHT/PHT
4 to 20 mA = 0 to +100 %RH
hygrotest 600 with displays H1, H3, H7 is supplied
via the humidity connections. The temperature output,
if available, can only function if a humidity circuit with
24 V is connected. This also applies in combination
with all displays.
230V/
110V
230V/
110V