170 of 220 Anatel A643a Maintenance - Anatel A643a
RPS - June 2007 - Edition 12
Operator Manual Anatel
13.7 Inlet Filter Replacement
Replacement Kit: P/N FG7017201
The Anatel A643a’s 15 micron Inlet Filter prevents potential particulate contamination from
entering the instrument. It should be checked yearly or if sample flow appears restricted.
A replacement Strainer Element (P/N FG7017301) is available from Hach Ultra.
Always disconnect the instrument from its power source before attempting to access internal
components.
To replace the 15 Micron Inlet Filter:
1) Disconnect the A643a TOC Analyzer’s AC power cord from its supply source.
2) Turn off the (user-supplied) isolation valve or otherwise stop sample flow to the
instrument.
3) Disconnect the sample tubing from the instrument by loosening the WATER IN
compression nut using a 9/16" wrench. Set the sample tubing aside for reassembly
later.
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