NTI Matrix Installation And Operation Instructions Manual page 70

Installation and Operation Instructions
The following are the thermistor curves for diagnosing the water and outdoor air sensors:
 Measure the resistance of the thermistor when disconnected.
 Using the appropriate chart, find the resistance and move either vertical (water probe) or horizontal (air probe)
until the line is intersected.
 Move 90 degrees to the corresponding temperature.
 If the temperature is plus or minus 10 degrees, then the probe is operating correctly.
Figure 13.1 M atrix Thermistor Resistance Chart
Figure 20-1 Thermistor Resistance Chart – 1 MOhm Water Probe (Low Temp.)
1 Mohm Water Probe (Low Temp.)
2.25
2
1.75
1.5
1.25
1
0.75
0.5
0.25
0
50 60 70
Figure 13.2 M atrix Thermistor Resistance Chart
1 Mohm Water Probe (Hi Temp.)
Figure 20-2 Thermistor Resistance Chart – 1 MOhm Water Probe (High Temp.)
120
100
80
60
40
20
0
160 170
Figure 13.3 Outdoor 10K probe
Figure 20-3 Thermistor Resistance Chart – 10 kOhm Outdoor Sensor
100
90
80
70
60
50
40
30
20
10
0
100
70
80 90 100
o
Water Tem perature ( F)
180 190 200
o
Water Tem perature ( F)
75 50
Tem perature (F)
110 120 130 140
210 220 230
25 0
Matrix