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Idiomas disponibles
Idiomas disponibles
OPERATION
Make sure to configure the thermostat or compatible
device for a 10K Ohm wired outdoor sensor. Installer
setup options vary according to thermostat/device
model.
The C7089U Outdoor Sensor converts outdoor
ambient temperature to a resistance that the
thermostat can interpret.
The C7089U has a negative temperature coefficient
(TC), which means that resistance decreases as the
temperature increases. See Table 1.
CHECKOUT
Allow C7089U Outdoor Sensor to absorb outdoor air
for a minimum of twenty minutes before taking a
reading.
With an accurate thermometer (±1 °F [0.5 °C])
measure the temperature at the sensor location,
allowing time for the thermometer to stabilize before
reading.
To verify sensor resistance, remove one wire from one
of the C7089U 60-in. leadwires. Use an ohmmeter to
measure the resistance across the sensor. Then verify
the sensor accuracy with the temperature/resistance
in Table 1.
CALIBRATION
The C7089U Outdoor Sensor is calibrated at the
factory and cannot be recalibrated in the field.
Table 1. Sensor Resistance
at Outdoor Temperature .
Outdoor Temperature
°F
-40
-38.2
-36.4
-34.6
-32.8
-31
-29.2
-27.4
-25.6
-23.8
-22
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
3
C7089U OUTDOOR SENSOR
Ohms of
°C
Resistance
-40
195652
-39
184917
-38
174845
-37
165391
-36
156512
-35
148171
-34
140330
-33
132957
-32
126021
-31
119493
-30
113347
-28.9
106926
-27.8
100923
-26.7
95310
-25.6
90058
-24.4
85124
-23.3
80485
-22.2
76137
-21.1
72060
-20.0
68237
-18.9
64631
-17.8
61246
-16.7
58066
-15.6
55077
-14.4
53358
-13.3
49598
-12.2
47092
-11.1
44732
-10.0
42506
-8.9
40394
-7.8
38400
-6.7
36519
-5.6
34743
-4.4
33063
-3.3
31475
-2.2
29975
-1.1
28558
0.0
27219
1.1
25949
2.2
24749
3.3
23613
4.4
22537
5.6
21516
69-1709EFS—03
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