Calibration commands - GMP231

GMP231 User Guide

Document code
M211501EN
Revision
E
Language
English (United States)
Product
GMP231
Document type
User guide

Before calibrating GMP231 using serial line commands, see Calibration and adjustment.

Make sure that the environmental compensation settings of the GMP231 are properly set for your calibration environment.

Table 1. CCO2 command
Syntax Description
cco2<cr> Show current user adjustment status.
cco2 -lo [co2]<cr>

cco2 -hi [co2]<cr>

Perform a 1-point (only either low or high concentration) or 2-point (both low and high concentrations) calibration and adjustment.

-lo = Adjustment at low concentration (under 2 %CO2)

-hi = Adjustment at high concentration (over 2 %CO2)

co2 = CO2 concentration reference in ppm

cco2 -save<cr> Save the currently entered adjustments.

Successfully saving the adjustment clears the calibration date (cdate command) and calibration text (ctext command) that have been stored in the probe. Use those commands to enter a new calibration date and text.

cco2 -cancel<cr> Cancel currently entered adjustments.
cco2 -reset<cr> Clear user adjustments.

Example (show current user adjustment status – no adjustment done):

pass 1300
cco2
1.Ref. point low        0
1.Meas. point low       0
2.Ref. point low   200000
2.Meas. point low  200000
Gain           : 1.0000
Offset         : 0.0000

Example (one-point adjustment in 5 % concentration (50000 ppm)):

pass 1300
cco2 –lo 50000
OK
cco2 –save
OK
Table 2. CDATE command
Syntax Description
CDATE<cr> Show calibration date.
CDATE [yyyy mm dd]<cr>

Set a new calibration date.

  • yyyy = Year of calibration in four digits.
  • mm = Month of calibration in two digits.
  • dd = Day of calibration in two digits.

Example (show currently stored calibration date):

>pass 1300
>cdate
Calibration date    :      2013-10-03

Example (set calibration date to 2014-03-10):

>pass 1300
>cdate 2014 03 10
Calibration date    :      2014-03-10
Table 3. CTEXT command
Syntax Description
CTEXT<cr> Show calibration information text.
CTEXT [text]<cr>

Calibration information text string, max 19 characters. If you want to use spaces in the string, enclose the text in quotes.

Example (shows the text “Calibrated at” followed by the currently stored calibration text):

pass 1300
ctext
Calibrated at Vaisala

Example (set calibration text to “Lab_1”):

pass 1300
ctext Lab_1
Calibrated at Lab_1
Table 4. CT command
Syntax Description
CT [temp]<cr>

Perform an offset correction to the internal temperature measurement.

temp = correct temperature in degrees Celsius (°C).

CT [-reset]<cr> Clear the offset adjustment from internal temperature measurement.

Example (adjust the internal temperature measurement to 23 °C at the current conditions):

pass 1300
ct 23
OK

Example (clear the offset adjustment from internal temperature measurement):

pass 1300
ct -reset
OK
Table 5. CP command
Syntax Description
CP [pressure]<cr>

Perform an offset correction to the internal pressure measurement.

pressure = Correct pressure in hectopascals (hPa).

CP [-reset]<cr> Clear the offset adjustment from internal pressure measurement.

Example (adjust the internal pressure measurement to 990 hPa at the current conditions):

pass 1300
cp 990
OK

Example (clear the offset adjustment from internal pressure measurement):

pass 1300
cp -reset
OK