Remote Zero/Span Check Or Adjustment (Rs-232); Hold Off - Teledyne 401 Instruction Manual

Teledyne API Model 401 O
Teledyne API recommends that contact closures remain closed at
10 minutes to allow for an accurate average zero or span value

3.8 Remote Zero/Span Check Or Adjustment (RS-232)

Besides Z/S checking from the front panel, automatic Z/S checking, and remote Z/S checking via
the contact closure inputs, the Analyzer can also be checked via the RS-232 interface. Remote
checking via the RS-232 interface supports zero, span, and zero followed by span check, and is
identical to remote check via the contact closure inputs.
This RS-232 control feature is provided mainly so that a host computer at another location can
control the Analyzer. See Section 7 for detailed information on using the RS-232 interface to do
a remote Z/S check.

3.9 Hold Off

Every type or check or adjustment (zero, span, manual, remote, etc.) is followed by a hold-off
period of 30 seconds during which the internal data acquisition system (DAS) does not
accumulate ozone readings into the DAS average.
Photometric Calibrator Instruction Manual, 01124, Rev. J1
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NOTE
least
to be established.
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