Table 7 (page 32) lists the basic serial commands that are available by default. To access
advanced serial commands (listed in Table 8 (page 33)), enter the command pass 1300.
Table 7 Basic Serial Commands
Command Description
Device information and status
?
Show probe information.
??
Show probe information (will respond in POLL mode).
errs
Show currently active errors.
help
Show list of currently available serial commands.
snum
Show probe serial number.
system
Show probe firmware information.
time
Show probe operation hours and uptime.
vers
Show probe firmware version.
Serial line output and communication
close
Close connection to probe (POLL mode)
form [modifier string]
Show or set output format.
intv [0 ... 255 s/min/h]
Set continuous output interval for R command.
open [address]
Open connection to probe in POLL mode.
r
Start the continuous outputting.
s
Stop the continuous outputting.
sdelay [1 ... 255]
Show or set serial line transmission delay (1 ... 255, 1 unit = 4 milliseconds)
send
Output a single measurement message.
seri [baud data stop
parity]
Show or set the serial interface settings.
smode [mode]
Show or set startup serial mode: RUN, STOP, or POLL.
Environmental compensation
env
Show or set environmental parameters.
Adjustment information
adate
Show CO
2
factory adjustment date.
atext
Show CO
2
factory adjustment information.
Other commands
reset
Reset the probe.
pass [1300]
Access advanced serial commands.
GMP252 User Guide M211897EN-D
32
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