posirot
®
Magnetic angle sensors, dust-ex proof
18
Version 4.2.0
www.asm-sensor.com
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4 Maintenance and disposal
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4.1 Maintenance and service
Explosion risk!
•
Maintenance may only be performed when no explosive atmospheric conditions are
present.
Maintenance interval
•
Within maintenance activities, especially those parts of the sensor which are associated with the risk of
ignition must be checked (e.g. the integrity of connectors, cables, seals etc.). Maintenance intervals are
application specific and must be determined by the customer depending on the operating conditions.
•
Dust concentrations between sensor and magnet are not allowed
– remove any dust deposit –
appropriate maintenance intervals must be scheduled.
The following maintenance steps are recommended:
Check for dust
deposit
Integrity of
housing, cables
connectors
Mounting
elements
Visual check of
shaft sealing
PRAS2EX
x
x
x
PRAS3EX
x
x
x
x
PRAS5EX-K
x
x
x
PRAS5EX-V
x
x
x
x
Actions
Dust deposit:
Remove dust
Damaged parts:
remove sensor
from service and
send it to ASM for
repair
Loose mounting
parts: Screw tight
mounting parts
with recommended
torque, if
applicable use bolt
adhesive
Damaged shaft
sealing:
remove sensor
from service and
send it to ASM for
repair
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4.2 Deinstallation (dust-ex proof standard-compliant)
Danger of explosion due to incorrect deinstallation
•
Remove sensor only in de-energized condition.
•
Removal of the sensor must only be undertaken in non-explosive conditions.
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Calibration
The recommended calibration interval is 1 year.
Test protocol and traceable calibration certificate (ISO9001 / ISO10012) is available on request.
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4.3 Disposal
Disposal according to applicable government regulations.
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