S
O
<90% RH
mA curve
Low (-.3 Vdc)
0.672
Nominal
0.972
High (+.3 Vdc)
1.272
> 90% RH
mA curve
Low (-.4 Vdc)
0.572
Nominal
0.972
High (+.4 Vdc)
1.372
S
R
<90% RH
mA curve
Low (-.3 Vdc)
0.72
Nominal
1.02
High (+.3 Vdc)
1.32
> 90% RH
mA curve
Low (-.4 Vdc)
0.62
Nominal
1.02
High (+.4 Vdc)
1.42
NOTE: The accuracy of the sensors used to measure the temperature and humidity of the
environment needs to be considered. If you are close to the measurements your C7400
sensor is probably working.
Vdc measured between SO and GND
4
6
8
1.158
1.644
1.458
1.944
1.758
2.244
4
6
8
1.058
1.544
1.458
1.944
1.858
2.344
Vdc measured between Sr and GND
4
6
8
1.23
1.74
1.53
2.04
1.83
2.34
4
6
8
1.13
1.64
1.53
2.04
1.93
2.44
10
12
2.13
2.616
3.102
2.43
2.916
3.402
2.73
3.216
3.702
10
12
2.03
2.516
3.002
2.43
2.916
3.402
2.83
3.316
3.802
10
12
2.25
2.76
3.27
2.55
3.06
3.57
2.85
3.36
3.87
10
12
2.15
2.66
3.17
2.55
3.06
3.57
2.95
3.46
3.97
171
Section 13 - Checkout
14
16
18
3.588
4.074
3.888
4.374
4.188
4.674
14
16
18
3.488
3.974
3.888
4.374
4.288
4.774
14
16
18
3.78
4.29
4.08
4.59
4.38
4.89
14
16
18
3.68
4.19
4.08
4.59
4.48
4.99
Honeywell Economizers 63-8594-02
20
4.56
4.86
5.16
20
4.46
4.86
5.26
20
4.8
5.1
5.4
20
4.7
5.1
5.5