Teledyne 300M, Instruction Manual, Page: 46 / 123

Teledyne API Model 300M CO Analyzer Instruction Manual, 04033, Rev. A
3.7 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.
3.8 Power-On Hold Off
Whenever the Model 300M is powered on it will go through a HOLD-OFF sequence (see
Section 3.9) like it does after a zero/span check.
3.9 Hold Off
Every type of check or adjustment (zero, span, manual, remote, etc.) is followed by a hold off
period of from 1 to 20 minutes, during which time the internal data acquisition system (DAS)
does not accumulate CO readings into the DAS average. To set the hold off time, press
SETUP-
MORE-VARS and press NEXT until the variable HOLDOFF_TIME is displayed. To change
the setting, enter a number from 1 to 20 and then press ENTR to store the new value or EXIT to
leave the hold off time unchanged.
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