Teledyne 326, 327 and 328 - Oxygen analyzers User Manual

Page 29

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Teledyne Analytical Instruments

Operations

Model 326/327/328

4-1

Operations

4.1 Preliminary

Before supplying power to the instrument, TBE suggests that the electri-

cal wiring installation and fuses be checked against the interconnection
diagram—particularly if the installation has been made by personnel

particularly if the installation has been made by personnel

other than those responsible for startup and operation.

other than those responsible for startup and operation. Note that most
electrical connections are made directly to terminal blocks on the
motherboard.

All accessory hardware, fittings, and gas connections between the

analyzer and sample point should be leak tested under pressure prior to
startup.

In many instances, proper attention to these two preliminaries will pre-

vent severe damage (accidental wiring transpositions) and ambiguous analy-
sis (diffusion leaks into the sampling system).

4.2 Meter Zero

Before applying power to the analyzer (range switch in any position but

OFF), check and adjust (if necessary) the mechanical zero of the analyzer
(except in models using digital meters). The pointer should indicate zero with
the power OFF; if not, adjust the screw on the face of the meter to zero the
pointer. This step is important if full advantage of the accuracy of the meter
is to be realized, and even more important if remote indicating and/or record-
ing equipment is involved in the system. An offset on the meter will result in
a tracking error between the two devices, which becomes significant when
the meter is used to calibrate the analyzer.

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