Teledyne API Model 200AU NOX Analyzer Instruction Manual, 02293, Rev. F
5-34
Whenever a warning message is reported on the analyzer display, if the RS-232 interface is in
the normal mode(i.e. not in quiet mode) the warning message is also sent to the RS-232
interface. These messages are helpful when trying to track down a problem with the analyzer and
for determining whether or not the DAS reports are actually valid. The warning message format
is for example:
W 194:11:03 0200 SAMPLE FLOW WARN
The format of a warning command is W command. Examples of warning commands are:
W LIST List all current warnings
W CLEAR ALL Clear all current Warnings
Individual warnings may be cleared via the front panel or the command line interface. To clear
the sample flow warning shown above the command would be:
W WSAMPFLOW
5.5.5 CALIBRATION Commands and Messages There are several methods of both checking the calibration and calibrating the M200AU, these
are discussed in Section 7. The C command executes one of the calibration commands shown in
Table 5-18.
Table 5-18: RS-232 Calibration Commands
Command Description
C [id] ZERO [1 or 2] Start remote zero calibration. The number is optional and selects the
range to calibrate. If not specified, the range defaults to range 1.
C [id] COMPUTE ZERO Tells the instrument to compute a new slope and offset. Same as
pressing ZERO-ENTR on front panel.
C [id] SPAN [1 or 2] Start remote span calibration.
C [id] COMPUTE SPAN Tells the instrument to compute a new slope and offset. Same as
pressing SPAN -ENTR on front panel.
C [id] ASEQ number Executes automatic calibration sequence (1, 2, or 3).
C [id] EXIT Exits the current calibration step and goes to the next one.
C [id] ABORT Aborts the entire calibration sequence.