Vaisala DPT146 Guía de usuario Pagina 22

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User's Guide _______________________________________________________________________
20 ___________________________________________________________________ M211372EN-D
DPT146 Startup Sequence
When the transmitter is powered up, it will perform the sequence shown
in Figure 7 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 24 hours, and
auto-calibration every hour. The output will again be frozen for their
duration.
1109-016
Figure 7 DPT146 Startup Sequence
NOTE
The
transmitter always performs this sequence when starting up. Keep
the transmitter continuously powered to optimize its measurement
performance and availability.
No
rma
l ou
tpu
t N
o
rm
al
o
ut
put
5
s
Output frozen
5 mi
n 3 ... 6 min
Time
Purge*
3 ... 4 min
Au
t
oc
al
*
*
<2 min
* Purge
will repeat ev
er
y
24
h
our
s
** Autocal will repea
t e
v
er
y 6
0
min
utes
(is
pos
tpo
ned if environment is not
suitable)
St
artu
p
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