Vaisala DMT152 - Manual (Page 42)

User's Guide _______________________________________________________________________
40 ___________________________________________________________________ M210865EN-F
Purge Status Alarm
The transmitter can temporarily freeze the output when measurement is
not possible (for example, during sensor purge). The purge status alarm
indicates this state by setting the analog output at a defined level, in the
same way as the limit alarm (see page 39).
Use the STATUS command to enable/disable the alarm and to define the
voltage/current levels (see example below). The channel is set to the
value of Level Hi when sensor purge is active and to Level Lo during
normal operation. During auto-calibration, the output is not frozen, that
is, the output of the purge status alarm is on Level Lo.
STATUS
The following example shows the purge status alarm enabled for
channel 1:
status
Channel 1:
Status : ON ?
Level Lo : 0.00 ?
Level Hi : 5.00 ?
Channel 2:
Status : OFF ?
Level Lo : 0.00 ?
Level Hi : 0.00 ?
Level Lo and Level Hi are shared between the STATUS and ALARM
commands. For example, if you change the levels using the alarm
command, they will also change when viewing the status command.