Series 830/840/860 Instruction Manual

Chapter 4 Maintenance

 

 

Caution! It is important that this transducer be serviced only by qualified personnel.

Caution!

Always fully neutralize any toxic gas trapped in- side the transducer before removing from the gas line.

Chapter 4 Maintenance

Side-Trakand Auto-Traktransducers essentially require no scheduled maintenance other than periodic flow path cleaning if the gas is dirty. If an in-line filter is used, the filtering element should be periodically be replaced or ultrasonically cleaned. In- cluded in 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 4-15

Flow Path Maintenance

The transducer flow path is 316 stainless steel (wetted magnetic parts of the solenoid valve are 430F stainless steel) with Viton® Neoprene® or Kal-Rez®(or equivalent) seals, depending on the gas used. The flow path should be periodically inspected and cleaned as required.

When toxic or corrosive gases are used, purge unit thoroughly with inert dry gas before disconnecting from the gas line. A transducer used with toxic or corrosive gas must NOT be returned to the fac- tory. Contact Technical Support for details.

Cleaning the Laminar Flow Element

The laminar flow element (LFE) is a precision flow divider which diverts a preset amount of flow through the sensor tube. The LFE is made of precision machined 316 stainless steel. The particular LFE used depends on the gas and flow range of the instrument and is identified by the number on the transducer nameplate. Should the LFE require cleaning or inspection due to deposition, use the appropriate cleaning procedure given on the following pages.

CAUTION! : REMOVING THE LFE WILL SHIFT THE

CALIBRATION OF THE INSTRUMENT. DO NOT REMOVE THE LFE

UNLESS YOU PLAN ON RE-CALIBRATING THE TRANSDUCER.

IM-83/84/86-H

4-1

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Sierra 830, 860, 840 instruction manual Flow Path Maintenance, Cleaning the Laminar Flow Element

840, 830, 860 specifications

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