Vaisala PTU300 - Manual (Page 138)

User's Guide _______________________________________________________________________
136 __________________________________________________________________ M210796EN-G
Table 34 Relay State Examples
Criterion for
Relay Activation
Transmitter
Operation Status
NC-C
Connected
NO-C
Connected
Not chosen
Power off
RH below 50 %*
Measured RH
above 50 %
Measured RH
below 50 %
RH above 50 %*
Measured RH
above 50 %
Measured RH
below 50 %
Fault status
Measurement OK
Error active
Online status
Measurement live
Purge or sensor
heating active
* Hysteresis has an effect when relay switching is based on live measurement.
See section Hysteresis on page 134.