EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER
74-2958—1112
Fig. 56. Graph of Sensor Resistance versus Temperature.
Voltage/Current Sensors.
Sensor Type:
C7600B1000 2 to 10V
(
Decorative Wall Mount
)
Sensor Use:
Humidit
y
Table 34 lists the points for Sensor Volta
g
e versus Humidit
y
.
Fi
g
. 57 shows the
g
raph of these points.
Table 34. Sensor Voltage Versus Humidity.
Fig. 57. Graph of Sensor Voltage versus Humidity.
Sensor Type:
C7600C
(
4 to 20 mA
)
Sensor Use:
Humidit
y
Table 35 lists the points for Sensor Volta
g
e versus Humidit
y
.
Fi
g
. 58 shows the
g
raph of these points.
Table 35. Sensor Voltage Versus Humidity.
Fig. 58. C7600C output current vs. humidity.
Sensor Type:
T7400A1004
Sensor Use:
Enthalp
y
Humidity Percentage Sensor Voltage
10 2.67
15 3.08
20 3.48
25 3.88
30 4.28
35 4.68
40 5.08
45 5.48
50 5.88
55 6.28
60 6.69
65 7.09
70 7.49
75 7.89
80 8.29
85 8.69
90 9.09
8000
8100
8200
8300
8400
8500
8600
8700
8800
8900
55 60 65 70 75 80 85
OHMS
DEGREES F
SENSOR RESISTANCE VERSUS TEMPERATURE
M11608
Relative Humidity Percentage Sensor Voltage
10 5.6
20 7.2
30 8.8
40 10.4
50 12.0
60 13.6
70 15.2
80 16.8
90 18.4
2.50
3.00
3.50
4.00
4.50
5.00
5.50
6.00
6.50
7.00
7.50
8.00
8.50
9.00
9.50
10.00
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
VOLTS
PERCENTAGE
SENSOR VOLTAGE VERSUS HUMIDITY PERCENTAGE
M11610
HUMIDITY IN PERCENT RELATIVE HUMIDITY
CURRENT IN MILLIAMPS
4
18
8
16
6
14
12
20
10
10
M3131B
5.6
7.2
8.8
10.4
12.0
13.6
15.2
16.8
18.4
10
20
30
40
50
60
70
80
90
20 10090807060504030
RH (%) I (mA)
0