tekmar 086 Humidity & Temperature Sensor - Manual (Page 7)

© 2012 086_D - 08/12
7 of 8 A Watts Water Technologies Company
Technical Data
Humidity & Temperature Sensor 086; Flush Mount
Literature 086_C, 086_D
Packaged weight 0.13 lbs (60 g)
Enclosure White PC-ABS plastic, NEMA 1
Dimensions 1-7/16” O.D. x 1-9/16” D (36 O.D. x 40 mm)
Ambient conditions Indoor use only, 15 to 140°F (-10 to 60°C), non-condensing
Environmental
Compatible with chlorinated swimming pool environments.
Do not use in presence of ammonia (animal barns), methanol,
ethanol, acetone.
Power supply 2.7 to 5.5 V (dc), 0.5 mA maximum, 65 kΩ min impedance
Humidity sensor 0 to 90% ± 3% RH
Temperature sensor NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) β = 3892
Humidity vs. Voltage Table
Humidity Sensor Testing Instructions
Setup the thermostat to disable the built-in humidity sensor and measure only the
external humidity sensor. The thermostat should be powered for 15 minutes prior
to testing. Record the external relative humidity reading. Use an electrical meter
and set to V (dc). Measure the voltage between the +V and Com wires. It should
measure 3.3 V (dc). If the voltage is different, the thermostat power supply may
be faulty. Next, measure the voltage between the %RH and Com wiring terminals
from the thermostat location. Using the humidity versus voltage table, estimate the
measured relative humidity level in the room. If the displayed relative humidity on
the thermostat and the measured relative humidity are similar the sensor is working
correctly. If the displayed relative humidity on the thermostat is significantly different
than the measured relative humidity, the sensor may require replacement.
RH Voltage (%RH to Com) RH Voltage (%RH to Com)
5 0.59 55 1.61
10 0.69 60 1.72
15 0.79 65 1.82
20 0.90 70 1.92
25 1.00 75 2.03
30 1.10 80 2.13
35 1.20 85 2.23
40 1.31 90 2.33
45 1.41 95 2.44
50 1.51 100 2.54