Honeywell H7635C Manual Do Utilizador

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H7625B; H7635B,C; H7655B DUCT-MOUNT AND OUTDOOR-MOUNT HUMIDITY/TEMPERATURE SENSORS
5
63-2579—3
CHECKOUT
CAUTION
Equipment Damage Hazard.
Can short electric circuitry. 
• Never connect 120 Vac to the transducer. 
• Connect only DC voltage to a transducer 
intended for DC supply.
NOTE: Use laboratory quality meters and gauges for 
applications requiring a high degree of accuracy.
1. Verify the transducer is mounted in the correct posi-
tion.
2. Verify appropriate input signal and voltage supply.
3. Verify appropriate configuration range.
Converting Output Signal to Percent RH
4 to 20mA Signal
Example: 12 mA output signal
(12 - 4)/ 0.16 = 50% RH
0 to 10 Vdc Signal
Example: 8 VDC transmitter signal output
8 Vdc/0.10 = 80% RH
Table 2. Troubleshooting.
signal [in mA] 4
0.16
-------------------------------------------------
percent RH
=
Problem
Items to Check
No reading
• Verify correct supply voltage at the power terminal blocks.
• Verify correct wiring configuration and DIP switch settings.
• Verify that terminal screws are connected tightly with all wires firmly in place.
Erratic readings
• Verify all wires are terminated properly.
• Ensure that there is no condensation on the board.
• Verify clean input power. In areas of high RF interference or noise, shielded cable can be 
necessary to stabilize signal.