7
Command Response
Description
aD0!
a<value1><value2><CR><LF>
Example: a+1.0+25.6
Send a single pressure and temperature
reading
a – sensor address
value1 – depth or pressure
value2 – temperature
aM1!
atttn<CR><LF>
Example: a0004
Request min and max (crest and trough)
since the last M1 command.
Smart PT takes a sample every second and
stores min and max in nonvolatile memory.
Min and max are reset when the M1
command is received.
aD0!
a<min><max><tmin><tmax><CR><LF>
Example: a+1.0+1.4+48+67
Send min and max since the last M1
command
a – sensor address
min – lowest pressure encountered since last
M1 reading
max – highest pressure encountered since
last M1 reading
tmin – seconds elapsed since the minimum
reported in <min>
tmax – seconds elapsed since the maximum
reported in <max>
See the section, “Using Excel to extract
timestamped crest values from a data set” for
more information on using tmin and tmax
aM2!
atttn<CR><LF>
Example: a0003
Request average and standard deviation of
pressure since the last M2 command
Smart PT takes a sample every second and
maintains a cumulative average and standard
deviation. Average and standard deviation are
reset when the M2 command is received.
