Orion System Digital Room v.1 - Manual (Page 7)

Operator Interface
DIGITAL ROOM SENSOR
7
Troubleshooting
Table 1: Temperature/Resistance for Type III 10K Ohm Thermistor Sensors
Temperature – Resistance – Voltage for
Type III 10K Ohm Thermistor Sensors
Temp
(ºF)
Resistance
(Ohms)
-10 93333
-5 80531
0 69822
5 60552
10 52500
15 45902
20 40147
25 35165
30 30805
35 27140
40 23874
45 21094
50 18655
52 17799
54 16956
56 16164
58 15385
60 14681
62 14014
64 13382
66 12758
68 12191
69 11906
70 11652
Temperature – Resistance – Voltage for
Type III 10K Ohm Thermistor Sensors
Temp
(ºF)
Resistance
(Ohms)
71 11379
72 11136
73 10878
74 10625
75 10398
76 10158
78 9711
80 9302
82 8893
84 8514
86 8153
88 7805
90 7472
95 6716
100 6047
105 5453
110 4923
115 4449
120 4030
125 3656
130 3317
135 3015
140 2743
145 2502
150 2288
Figure 9: Temperature/Resistance Testing
+
-
T
Digital Room Sensor
Back View
9302
MICR OC HIP PIC 24H J 256G P206
NOTE: ,
Table 1
For This Test The Sensor Must Be Disconnected From
Its TSDRSC Cable As Shown. The Meter Must Be Set To
Measure Resistance in Ohms. Use
To Determine If The
Sensor Is Reading The Correct Resistance Value For The
Ambient Temperature. This Resistance Value Should Match The
Temperature Value Listed Next To The Resistance Value In The
Table. The Temperature Should Be Measured With A Separate
Accurate Temperature Measuring Device Located In The Area
Where The Sensor Is Currently Located.
Test Points Labeled
“Extern Therm” On
Sensor Circuit Board
+
-
TSDRSC Cable
From
Sensor To The
VAV/Zone or VCM-X
Controller Modular
Sensor Port
Disconnected