USER'S GUIDE____________________________________________________________________
20 __________________________________________________________________ M211371EN-B
DPT145 Startup Sequence
When the transmitter is powered up, it will perform the sequence
shown in Figure 4 below. After a five-second startup, the transmitter
will measure normally for five minutes, after which it will perform
the sensor purge and auto-calibration functions. This can take up to
six minutes, during which time the output is frozen: it will display the
last measured values before the sensor purge began.
Normal operation and output is typically achieved no later than 11
minutes after startup. The sensor purge will repeat every 12 hours,
and auto-calibration every hour. The output will again be frozen for
their duration.
Normal output
Normal output
5 s
Output frozen
5 min
3 ... 6 min
Time
Purge*
3 ... 4 min
Autocal**
<2 min
* Purge will repeat every 12 hours
** Autocal will repeat every 60 minutes (is postponed if environment is not suitable)
Startup
1108-033
Figure 4
DPT145 Startup Sequence
NOTE
The transmitter always performs this sequence when starting up. Keep
the transmitter continuously powered to optimize its measurement
performance and availability.
