DIP Switch Humidity Output Selection - HMD65 - HMD60

HMD65 Quick Guide

Document code
M212264EN
Revision
B
Language
English (United States)
Product
HMD65
HMD60
Document type
User guide
Figure 1. HMD65 DIP Switch Example: Tdf 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 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.