Teledyne API Model 300M CO Analyzer Instruction Manual, 04033, Rev. A
5.3 M300M Internal Variables
The M300M software contains many adjustable parameters. Many of the parameters are set at time
of manufacture and do not need to be adjusted for the lifetime of the instrument. It is possible to
change these variables either through the RS-232 port or the front panel. Altering the values of
many of the variables, especially those not listed on Table 5-3, will adversely affect the
performance of the instrument. Therefore it is recommended that these variables not be adjusted
unless you have a clear understanding of the effects of the change.
To access the VARS menu press SETUP-VARS-ENTR. Use the PREV-NEXT button to select the
variable of interest and press EDIT to examine/change the value, then press ENTR to save the new
value. If no change is required, press EXIT.
Table 5-3: M300M Variables
No. Name Units
Default
Value
Value
Range
Description
0 DAS_HOLD_OFF MIN 15 0 - 20 DAS hold off duration after
calibration or diagnostic
1 DYN_ZERO OFF OFF/ON Enable to adjust zero
calibration through remote
contact closure
2 DYN_SPAN OFF OFF/ON Enable to adjust span
calibration through remote
contact closure
3 RS232_MODE Bit Field 8 0 - 99999 Value is SUM of following
decimal numbers:
1=enable quiet mode
2=enable computer mode
4=enable security feature
8=enable front panel RS-232
menus (API protocol)
16=enable alternate protocol
32=enables multi-drop
support
64=Enable modem
4096=enable command
prompt
4 CLOCK_ADJ Sec. 0
±60
Real-time clock adjustment
5-7
