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HE 5422 Operating Instructions
# 342338 | Version 1.3
The differential pressure is measured internally and passed on as a 4 - 20 mA / 0 - 10 V signal to the
higher-level control system or to a display device. The current output is scalable over the adjustable
measuring range. For example:
0 - 30 mbar
≙
4 - 20 mA / 0 - 10 V, 0 - 20 mbar
≙
4 - 20 mA / 0 - 10 V
The cleaning process is started in normal operation when the upper "cleaning" threshold is exceeded
and ended when the lower "cleaning" threshold is reached. There is a delay time of 5 minutes in order
to carry out post-cleaning in a normal switch-off process without triggering an alarm message by falling
below the low alarm. The post-cleaning threshold must be reached before the end of this 5 minute
period, otherwise the low alarm will be triggered.
Measuring range of the
sensor
High alarm
Precoating
Upper threshold
Cleaning start
Lower threshold
Cleaning stop
Low Alarm
Start cleaning
On
Cleaning
Off
On
Alarm relay
Off
Differential pressure
Delay time
5 minutes
Post-
cleaning
Cleaning
Time
