Vaisala SHM40 - Manual (Page 36)

USER'S GUIDE____________________________________________________________________
34 __________________________________________________________________ M211423EN-B
Connecting the Probe
NOTE It is recommended that you turn off the HM40 indicator before
connecting or disconnecting the probe.
The HM40 indicator that is delivered with the SHM40 kit (or when
ordering the HM40S) has an adapter with a 3.5 mm TRRS connector
socket on top. The cable of the HMP40S probe has the equivalent plug.
To connect the probe, simply plug in the probe cable to the connector.
1111-135
Figure 16 Connecting the Probe