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The
NN
CAR
request produces the following answer:
1)
Process controller configured for pH:
If pH is not calibrated: “
NN
<STX>0<ETX>”
If calibration has been performed: “
NN
<STX>1
date time
offset slope1 slope2 buf1 buf2 N
<ETX>”
The items in italic are separated by blank spaces and have
the following formats:
date
ddmmyy
(“020498” for April 2, 1998)
time
hhmm
(“1623” for 4:23 pm)
offset
ASCII string for a float
(example: “-0 .2”)
slope1
ASCII string for a float
(example: “62 .5”)
slope2
ASCII string for a float
(example: “60 .4”)
buf1
ASCII string for a float
(example: “7 .01”)
buf2
ASCII string for a float
(example: “4 .01”)
When some of the above items is missing (for example
buf2
when a 1-point calibration is performed) it is indicated with
a “N” letter .
2)
Process controller configured for ORP:
If mV is not calibrated: “
NN
<STX>0<ETX>”
If calibration has been performed: “
NN
<STX>1
date time
N N N buf1 buf2 N
<ETX>”
The items in italic are separated by a blank spaces and
have the following formats:
date
ddmmyy
(“020498” for April 2, 1998)
time
hhmm
(“1623” for 4:23 pm)
buf1
ASCII string for a float
(example: “0”)
buf2
ASCII string for a float
(example: “1900”)
None of the items above can be missing when the Process
Controller is configured to measure and control ORP (as it
always has to be calibrated on two points) .
Note
When the “measurement input selection” item is set to “Digi-
tal Transmitter” the last calibration data retrieved through
this command refer to Digital Transmitter and is stored in
that device .
