Cleaning Air Box
Overview
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ba75731e02
02/2008
1
Overview
1.1
Structure and function
The Cleaning Air Box is used to clean sensors with compressed air. It
is suitable to be used at the measuring location and can be installed
outdoors (sun shield recommended). The integrated compressor
(membrane pump) draws in air from outside through an intake air filter
and presses it through the cleaning nozzles at the sensor. This cleans
the sensor element.
Operation takes place at intervals. The pump is switched on and off
with an external switch. A relay contact of the measuring system is
used as the switch. The relay contact is configured and controlled for
the cleaning function via the software of the measuring system.
System requirements
Depending on the measuring system, the following is required:
z
IQ S
ENSOR
N
ET
System 182: A free relay contact in the Universal
Transmitter DIQ/S 182.
z
IQ S
ENSOR
N
ET
Systems 184 XT and 2020 XT: A free relay contact
in an MIQ/CR3 or MIQ/R6.
z
Analog measuring transmitters (series 170/296): A free relay output
in an instrument with R option.
Circuit diagram
Fig. 1-1
Circuit diagram of the Cleaning Air Box
Air
To the sensor
5 R2
R1
xxx
V A
C
L
N
4
3
2
1
T>70°C
M
Compressor
