Enabling/disabling the relays, Operation of the indication leds, Table 30 – Vaisala DMT340 User Manual
Page 134: Relay state examples, Table 30 relay state examples
User's Guide _______________________________________________________________________
132 __________________________________________________________________ M210704EN-G
Table 30
Relay State Examples
Criterion for
Relay Activation
Transmitter
Operation Status
NC-C
Connected
NO-C
Connected
Not chosen
Power off
T
d/f
below -10 °C*
Measured T
d/f
above -10 °C
Measured T
d/f
below -10 °C
T
d/f
above -10 °C *
Measured T
d/f
above -10 °C
Measured T
d/f
below -10 °C
Fault status
Measurement OK
Error active
Online status
Measurement live
Purge, AutoCal, or
sensor warming
active
* Hysteresis has an effect when relay switching is based on live measurement.
See section Hysteresis on page 130.
Enabling/Disabling the Relays
You can deactivate the relay outputs for example for service purposes of
your system.
Operation of the Indication LEDs
Relay is activated: LED is lit.
Relay is not activated: LED is not lit.