DIP switch output selection (HMD62) - HMD60 - HMD62 - TMD62

HMD62 TMD62 Quick Guide
Document code
M212049EN
Revision
D
Language
English
Product
HMD60
HMD62
TMD62
Content type
Product description > Features
Product description > Functions
Document type
User guide
Figure 1. HMD62 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 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 1, the transmitter's 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. HMD62 default parameter scaling
Parameter Default scaling for 4 … 20 mA 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 HMD60 User Guide.
CAUTION Note that the humidity output parameter selected with the DIP switches on the transmitter component board will be used instead of the parameter selected with Insight. When using Insight to configure the output, set all humidity parameter selection DIP switches on the transmitter component board to the OFF position (left) to ensure they do not cause a conflict with the Insight settings.
HMD62 only: If you use Insight to set both analog output channels to output T measurement, the humidity parameter DIP switches do not have an effect on the output.