You can change the humidity parameter that
is output on the RH channel of HMD65 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 1, the selected output parameter is dew point/frost point temperature
(Tdf). Keep the other DIP switches in the OFF position
(left).
The selected parameter uses the default
scaling shown in Table 1.
Table 1. HMD65 Default Parameter
Scaling
Parameter
Default Scaling for 0 … 10 V Output Range
RH
0 … 100 %RH
Td
-40 ... +80 °C (-40 ... +176 °F)
Tdf
-40 ... +80 °C (-40 ... +176 °F)
A
0 … 300 g/m3 (0 … 131.1 gr/ft3)
X
0 … 600 g/kg (0 … 4200 gr/lb)
Tw
-40 ... +80 °C (-40 ... +176 °F)
H
-40 … 1600 kJ/kg (-9.5 ... 695.6 Btu/lb)
If you need to change the default scaling
of a parameter, configure the output with Vaisala Insight PC software. See the
instructions in HMD65 User Guide.
CAUTION 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 humidity
parameter DIP switches to the OFF position (left) to ensure they do
not cause a conflict with the Insight settings.