Series 810 Instruction Manual
Chapter 4 Maintenance
Caution)
Always fully neutralize
any toxic gas trapped
inside the transducer
before removing from
the gas line.
Chapter 4 Maintenance
Mass-Trak
-
transducers require very little scheduled maintenance. In the
event that minor maintenance or adjustment is required, this chapter
provides general instructions for:
Flow Path Maintenance and Cleaning
Sensor Maintenance and Cleaning
Valve Maintenance and Adjustment
Transducer Calibration
Flow Path Maintenance
The transducer flow path should be periodically inspected and cleaned as
required. If an in-line filter is used, the filtering element should be
replaced periodically or ultrasonically cleaned.
The flow path is made of 316 stainless steel or glass-filled nylon (wetted
magnetic parts of the solenoid valve are 430F stainless steel) with Viton
®
,
Neoprene , or Kalrez
®
(or equivalent) seals, depending on the gas used.
If toxic or corrosive gases are used, purge unit thoroughly with inert dry
gas before disconnecting it from the gas line. If a transducer used with a
toxic or corrosive gas is returned to the factory, a Material Safety Data Sheet
must be enclosed with the unit upon its return.
Cleaning the Mass-Trak
Caution)
Do not disassemble the
instrument without
contacting the Sierra
Instruments customer
service department.
After purging (see Chapter 3), carefully remove the transducer from the gas
line. You may find a fine-mesh filter screen inside the inlet of the
instrument. Inspect the inlet fitting and the filter screen, if there is one, and
blow away any particles resting in or adhering to this area with low-
pressure compressed air. If the screen appears corroded or damaged it will
need to be replaced. Contact the Sierra Instruments Customer Service
Department before removing the fittings or the screen, as it is possible to
shift calibr a tion of the instrument at this point. If calibration shifts, you will
have to return your instrument to an authorized repair center for re-
calibration.
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