Honeywell W7750A T7770B,C 10K ohm setpoint potentiometer Relative, Offset Setpoint Temperature

EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER

Table 31. Sensor Resistance Versus Temperature.

°F			Resistance Ohms
40		9961.09
45		9700.90
50		9440.72
55		9180.53
60		8920.35
65		8660.16
70		8399.98
75		8139.79
80		7879.61
85		7619.42
90		7359.24
95		7099.06
100		6838.87
	80K
(OHMS)	70K
	60K
RESISTANCE	50K
	40K
	30K
	20K			20K OHM AT
				77oF (25oC)
	10K

30	40 50	60 70 80	90	100 110 oF
0	10	20	30	40 oC
	TEMPERATURE (DEGREES)			M5874A

Fig. 54. Graph of Sensor Resistance versus Temperature.

Sensor Type:

T7770B,C 10K ohm setpoint potentiometer (Relative)

Sensor Use:

Offset Setpoint Temperature

Table 32 lists the points for Sensor Resistance versus Temperature. Fig. 55 shows the graph of these points.

Table 32. Sensor Resistance Versus Temperature.

°F Above and Below Setpoint	Resistance Ohms
-9	8877.41
-8	8832.14
-7	8786.87
-6	8741.60
-5	8696.33

°F Above and Below Setpoint	Resistance Ohms
-4	8651.06
-3	8605.79
-2	8560.52
-1	8515.25
0	8469.98
1	8424.71
2	8379.45
3	8334.18
4	8288.91
5	8243.64
6	8198.37
7	8153.10
8	8107.83
9	8062.56

SENSOR RESISTANCE VERSUS TEMPERATURE

	8900
	8800
	8700
	8600
OHMS	8500
	8400
	8300
	8200
	8100
	8000
	-9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9
	DEGREES F	M11609

Fig. 55. Graph of Sensor Resistance versus Temperature.

Sensor Type:

T7770B,C 10 K ohm setpoint potentiometer (Absolute)

Sensor Use:

Direct Setpoint Temperature

Table 33 lists the points for Sensor Resistance versus Temperature. Fig. 56 shows the graph of these points.

Table 33. Sensor Resistance Versus Temperature.

°F	Resistance Ohms
55	8877.42
60	8741.62
65	8605.82
70	8470.02
75	8334.22
80	8198.42
85	8062.62

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