Heat Controller Water Source Heat Pump 5.5Temperature Sensor Resistance Chart, WattMaster WHP

WattMaster WHP Section 4

5.5Temperature Sensor Resistance Chart

TEMPERATUREº	RESISTANCE	VOLTAGEAT
-10F	93333Ω*	INPUT*4.620
-5	80531	4.550
0	69822	4.474
5	60552	4.390
10	52500	4.297
15	45902	4.200
20	40147	4.095
25	35165	3.982
30	30805	3.862
35	27140	3.737
40	23874	3.605
45	21094	3.470
50	18655	3.330
52	17799	3.275
54	16956	3.217
56	16164	3.160
58	15385	3.100
60	14681	3.042
62	14014	2.985
64	13382	2.927
66	12758	2.867
68	12191	2.810
69	11906	2.780
70	11652	2.752
71	11379	2.722
72	11136	2.695
73	10878	2.665
74	10625	2.635
75	10398	2.607
76	10158	2.577
78	9711	2.520
80	9302	2.465

TEMPERATUREº	RESISTANCE	VOLTAGEAT
82F	8893Ω*	INPUT*2.407
84	8514	2.352
86	8153	2.297
88	7805	2.242
90	7472	2.187
95	6716	2.055
100	6047	1.927
105	5453	1.805
110	4923	1.687
115	4449	1.575
120	4030	1.469
125	3656	1.369
130	3317	1.274
135	3015	1.185
140	2743	1.101
145	2502	1.024
150	2288	0.952

*Notes:

1.Use the resistance column to check the thermistor sensor while disconnected from the controllers (not powered).

2.Use the voltage column to check sensors while connected to powered controllers. Read voltage with meter set on DC volts. Place the “-”(minus) lead on GND terminal and the “+”(plus) lead on the sensor input terminal being investigated.

If the voltage is above 5.08 VDC, then the sensor or wiring is “open.” If the voltage is less than 0.05 VDC, the sensor or wiring is shorted.

Start-Up and Troubleshooting 4-41