Sensors - LG RCAW Operation & Maintenance Manual

Operation

Sensors

RTD (Resistance Temperature Detect)
To monitor the inlet water temperature, outlet water temperature, discharge temperature of the compressor,
ambient temperature and discharge temperature of the condenser of the cooler during chiller operation, RTD
(Resistance Temperature Detect) is used.
Inlet water temperature sensor of Cooler
Outlet water temperature sensor of Cooler
Compressor discharge temperature sensor
Ambient temperature sensor
Condenser discharge temperature sensor
The resistor value for the measured temperature is as follow.
Temperature (°F)
-328
-310
-292
-274
-256
-238
-220
-202
-184
-166
-148
-130
-112
-94
-76
-58
-40
-22
-4
14
32
42 Chiller Air-cooled Screw
RTD Temperature Vs Resistance Table
Resistance(Ω) Temperature(°F)
18.49
50
22.80 68
27.08 86
31.32
104
35.53
122
140
39.71
43.87 158
48.00 176
52.11 194
56.19 212
60.25 230
64.30 248
68.33
266
72.33
284
302
76.33
80.31 320
84.27 338
88.22 356
92.16 374
96.09 382
100.00
410
Resistance(Ω) Temperature(°F)
103.90
107.79
111.67
115.54
119.40
123.24
127.07
130.89
134.70
138.50
142.29
146.06
149.82
153.58
157.31
161.04
164.76
168.46
172.16
175.84
179.51
Table 12
Resistance(Ω)
183.17
428
446 186.32
464 190.45
194.07
482
197.69
500
518
201.29
536 204.88
554 208.45
572 212.02
590 215.57
608 219.12
626 222.65
226.17
644
229.67
662
680
233.17
698 236.65
716 240.13
734 243.59
752 247.04
- -
- -