Sierra Series 830/840/860 Side-Trak™ and ... - Sierra Instruments
Sierra Series 830/840/860 Side-Trak™ and ... - Sierra Instruments
Sierra Series 830/840/860 Side-Trak™ and ... - Sierra Instruments
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<strong>Series</strong> <strong>830</strong>/<strong>840</strong>/<strong>860</strong> Instruction ManualChapter 4 MaintenanceCaution!It is important that thistransducer be servicedonly by qualified personnel.Caution!Always fully neutralizeany toxic gas trapped insidethe transducerbefore removing fromthe gas line.Chapter 4 Maintenance<strong>Side</strong>-Trak <strong>and</strong> Auto-Trak transducers essentially require noscheduled maintenance other than periodic flow path cleaning ifthe gas is dirty. If an in-line filter is used, the filtering elementshould be periodically be replaced or ultrasonically cleaned. Includedin this chapter are general instructions for:• Flow Path Maintenance ...............page 4-1• Sensor Maintenance.....................page 4-6• Valve Maintenance......................page 4-8• Valve Adjustment......................page 4-12• Transducer Calibration ..............page 4-15Flow Path MaintenanceThe transducer flow path is 316 stainless steel (wetted magneticparts of the solenoid valve are 430F stainless steel) with Viton ®Neoprene ® or Kal-Rez ® (or equivalent) seals, depending on thegas used. The flow path should be periodically inspected <strong>and</strong>cleaned as required.When toxic or corrosive gases are used, purge unit thoroughly withinert dry gas before disconnecting from the gas line. A transducerused with toxic or corrosive gas must NOT be returned to the factory.Contact Technical Support for details.Cleaning the Laminar Flow ElementThe laminar flow element (LFE) is a precision flow divider whichdiverts a preset amount of flow through the sensor tube. The LFEis made of precision machined 316 stainless steel. The particularLFE used depends on the gas <strong>and</strong> flow range of the instrument <strong>and</strong>is identified by the number on the transducer nameplate. Shouldthe LFE require cleaning or inspection due to deposition, use theappropriate cleaning procedure given on the following pages.CAUTION! : REMOVING THE LFE WILL SHIFT THECALIBRATION OF THE INSTRUMENT. DO NOT REMOVE THE LFEUNLESS YOU PLAN ON RE-CALIBRATING THE TRANSDUCER.IM-83/84/86-H 4-1
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