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Cooling
Supply Air
Temperature
Return Air
Temperature
0%
Relative Humidity
9. As the relative humidity increases, the sensible cooling
temperature decreases. For example, if the relative
humidity is higher than 50 percent, the temperature
difference is greater than 18°F.
Cooling
Supply Air
Temperature
18 Calculated
Temperature Fall
Return Air
Temperature
0%
Relative Humidity
10. The factory-set tolerance range in a cooling application
is +/- 6°F from the 18°F calculated D/T. In this example,
the tolerance range is 12°F to 24°F. If desired, the
tolerance range can be increased or decreased for your
individual system or requirements. See Entering
Custom Setup section.
Calculated
Temperature Fall
Changes with
% Relative Humidity
50%
100%
50%
100%
W8710A EQUIPMENT MONITORING SYSTEM
Cooling
Supply Air
Temperature
18 Calculated
Temperature Fall
Return Air
Temperature
11. When the temperature fall between the return and sup-
ply sensors is measured and is higher than 24°F, a High
D/T Alert Report is generated.
Cooling
Supply Air
Temperature
18 Calculated
Temperature Fall
Return Air
Temperature
12. When the temperature fall between the return and sup-
ply sensors is measured and is lower than 12°F, a Low
D/T Alert Report is generated.
15
0%
50%
Relative Humidity
0%
50%
Relative Humidity
100%
100%
68-0256
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