Honeywell W7750A Voltage/Current Sensors, Sensor Voltage Versus Humidity Humidity Percentage

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

SENSOR RESISTANCE VERSUS TEMPERATURE

	8900
	8800
	8700
	8600
OHMS	8500
	8400
	8300
	8200
	8100
	8000	60	65	70	75	80	85
	55
			DEGREES F				M11608

Fig. 56. Graph of Sensor Resistance versus Temperature.

Voltage/Current Sensors.

Sensor Type:

C7600B1000 2 to 10V (Decorative Wall Mount)

Sensor Use:

Humidity

Table 34 lists the points for Sensor Voltage versus Humidity. Fig. 57 shows the graph of these points.

Table 34. Sensor Voltage Versus Humidity.

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

SENSOR VOLTAGE VERSUS HUMIDITY PERCENTAGE

10.00
	9.50
	9.00
	8.50
	8.00
	7.50
VOLTS	7.00
	6.50
	6.00
	5.50
	5.00
	4.50
	4.00
	3.50
	3.00
	2.50	15	20	25	30	35	40	45	50	55	60	65	70	75	80	85	90
	10
							PERCENTAGE									M11610

Fig. 57. Graph of Sensor Voltage versus Humidity.

Sensor Type:

C7600C (4 to 20 mA)

Sensor Use:

Humidity

Table 35 lists the points for Sensor Voltage versus Humidity. Fig. 58 shows the graph of these points.

Table 35. Sensor Voltage Versus Humidity.

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

	20										RH (%)	I (mA)
	18										10	5.6
MILLIAMPS
	16										20	7.2
											30	8.8
	14										40	10.4
											50	12.0
	12										60	13.6
IN
											70	15.2
CURRENT
	10										80	16.8
											90	18.4
	8
	6
	4
	0	10	20	30	40	50	60	70	80	90	100

HUMIDITY IN PERCENT RELATIVE HUMIDITY M3131B

Fig. 58. C7600C output current vs. humidity.

Sensor Type:

T7400A1004

Sensor Use:

Enthalpy

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