Maintenance
Proline t-mass 65 PROFIBUS DP/PA
88
Hauser
8
Maintenance
Generally, the flowmeter requires no special maintenance work, particularly if the gas is
clean and dry.
#
Warning!
Hazardous area approvals may demand that the device be returned to an Hauser
sales center (
109) for service or that work can only be carried out by a qualified
Hauser service person. Please contact your Hauser sales center if you have
any questions.
8.1
External cleaning
When cleaning the exterior of measuring devices, always use cleaning agents that do not
attack the surface of the housing and the seals.
8.2
Pipe cleaning
The sensor is capable of withstanding clean in place (CIP) processes using heated liquids or
steam (SIP), within the maximum specified temperature limits. However the sensor mea-
surement will be adversely affected during the cleaning cycle and a settling down period will
be required after the cycle to allow the process and sensor temperatures to re-stabilize.
!
Note!
The POSITIVE ZERO RETURN function maybe activated to set the current output to zero flow
during such cycles. See "Description of Device Functions" manual for more information.
"
Caution!
Do not use a pipe cleaning pig.
8.3
Sensor cleaning
For gases that do carry impurities, it is recommended that the sensor be routinely inspected
and cleaned to minimise any potential measuring errors due to contamination or build-ups.
The frequency of inspection and cleaning will depend upon the application and expected
measurement performance.
Cleaning is performed by applying a non-filming or oil-free type cleaning fluid to a soft brush
or cloth and gently wiping over the surface until all build-ups and contaminants are
removed.
"
Caution!
• Use care not to bend the sensing elements of the transducer during cleaning.
• Do not use abrasive materials or fluids corrosive to the sensor materials and seals.
Sensor-specific information:
• t-mass F:
Removal of the transducer requires specialist knowledge, tools and parts. The process seal
also may need to be tested and re-qualified. This procedure must be carried out by an
Hauser sales center.
• t-mass I:
When removing the measuring sensor, observe the safety guidelines in chapter "Installa-
tion"
19.
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