2.5.5 DIP Switch Output Selection (HMD62)
Figure 7 HMD62 DIP Switch Example: T
df
Output Selected
RH Relative humidity
Td Dew point temperature
Tdf Dew point/frost point temperature
A Absolute humidity
X Mixing ratio
Tw Wet-bulb temperature
H Enthalpy
You can change the humidity parameter that is output on the RH channel of HMD62 with the
DIP switches on the component board. Select the parameter you want the transmitter to
output by sliding the parameter's DIP switch to the right (ON). In the example in Figure 7
(page 11), the transmitter's selected output parameter is dew point/frost point temperature
(T
df
). Keep the other DIP switches in the OFF position (left).
The selected parameter uses the default scaling shown in Table 5 (page 11).
Table 5 HMD62 Default Parameter Scaling
Parameter Default Scaling for 4 … 20 mA Output Range
RH 0 … 100 %RH
T
d
-40 ... +80 °C (-40 ... +176 °F)
T
df
-40 ... +80 °C (-40 ... +176 °F)
A
0 … 300 g/m
3
(0 … 131.1 gr/ft
3
)
X 0 … 600 g/kg (0 … 4200 gr/lb)
T
w
-40 ... +80 °C (-40 ... +176 °F)
H -40 … 1600 kJ/kg (-9.5 ... 695.6 Btu/lb)
If you use the Insight software to further configure the output, note
that the DIP switch selections override the Insight configuration. When using
Insight to configure the output, set all DIP switches to the OFF position (left) to
ensure they do not cause a conflict with the Insight settings.
CAUTION!
Chapter 2 – Product Overview
11
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