Download Vaisala PTU300 User`s guide

User's Guide ______________________________________________________________________
Example:
When the 'active above' value is 60 %RH and the hysteresis value is 5
%RH, relay activates when the relative humidity reaches 60 %RH. As
the humidity decreases, relay releases at 55 %RH.
NOTE
If both setpoints are specified and "above" setpoint is lower than
"below" setpoint, the hysteresis works in the opposite direction, that
is, relay is released when the measured value passes the exact value
of the setpoint.
Relay Indicating Transmitter Error
Status
You can set a relay to follow the operation status of the device. By
selecting FAULT/ONLINE STATUS for output quantity a relay
changes state on the basis of the operation status as follows:
FAULT STATUS
Normal operation: relay active (C and NO outputs are closed)
Not measuring state (error state or power off): relay released (C and
NC outputs are closed).
ONLINE STATUS
Live measurement (data available): relay active (C and NO outputs are
closed)
No live data (for example: error state, chemical purge or adjustment
mode): relay released (C and NC outputs are closed).
See Figure 42 below for illustrative examples of the
FAULT/ONLINE STATUS relay output modes.
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