8: Firmware and Advanced Communications
225-00000-000-11-201604 115
Calibration Constants
Writes one of the 32 possible calibration constant to EEPROM. The calibration constant is
specified by the first DATA WORD which follows the x. The calibration constant is stored as an
ASCII string with a max length of 15 characters. The string is not check to see if it makes
sense.
x{DATA WORD}{ASCII STRING}
DATA WORD Index description
0 – Serial Number
1 – 0
th
order Wavelength Calibration Coefficient
2 – 1
st
order Wavelength Calibration Coefficient
3 – 2
nd
order Wavelength Calibration Coefficient
4 – 3
rd
order Wavelength Calibration Coefficient
5 – Stray light constant
6 – 0
th
order non-linearity correction coefficient
7 – 1
st
order non-linearity correction coefficient
8 – 2
nd
order non-linearity correction coefficient
9 – 3
rd
order non-linearity correction coefficient
10 – 4
th
order non-linearity correction coefficient
11 – 5
th
order non-linearity correction coefficient
12 – 6
th
order non-linearity correction coefficient
13 – 7
th
order non-linearity correction coefficient
14 – Polynomial order of non-linearity calibration
15 – Optical bench configuration: gg fff sss
gg – Grating #, fff – filter wavelength, sss – slit size
16 – Flame configuration: AWL V
A – Array coating Mfg, W – Array wavelength (VIS, UV, OFLV), L – L2
lens installed, V – CPLD Version
17 – Auto-nulling configuration information
18 – Startup Baud rate entry
19-30 – Reserved
To query the constants, use the ?x{DATA WORD} format to specify the desired constant.
Query Variable
Returns the current value of the parameter specified. The syntax of this command requires two
ASCII characters. The second ASCII character corresponds to the command character which
sets the parameter of interest (acceptable values are B, A, I, K, T, J, y). A special case of this
command is ?x (lower case) and ?W, which requires an additional data word be passed to
indicate which calibration constant is to be queried.
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