Eco Physics CLD 780 TR - Page 113

E C O P H Y S I C S RS-232 interface
CLD 780 TR / July 2000 110
b) “Calibrate“ commands
CS r,xxxxx Enter calibration gas concentration 2,4*)
r: Measurement range [0 ... 4] – compare SR
xxxxx: concentration in ppbv [20 ... 102 % of range
full-scale] (floating point)
r: 5 = Continuous measurement
xxxxx: concentration in ppbv [1.000 ... 200.0]
CR r Return cal. gas concentration
r: Measurement range [0 ... 4] – compare SR
r: 5 = Continuous measurement
Reply: xxx.x concentration in ppbv
CP m,n Start calibration procedure 1,2,4*)
m: 0 = Zero air
1 = Cal. gas (NO) after Zero air
2 = Cal. gas (NO) alone
n: xxx Number of measurement cycles [1 ... 9]
– Valve setting = Cal. gas
– Measure
– Calculate and enter new calibration
m: 3 = Zero calibration 1,2,4,9*)
1 = NO calibration
2 = Cal. gas (NO) alone
n: xxx Total duration of calibration in sec.
– Valve setting = Cal. gas
– Measure
– Calculate and enter new calibration
m: 5 = AIC
CC s,d Copy calibration coefficients 1,2,4*)
s: Source measurement range [0 ... 4] – comp. SR
d: Target measurement range [0 ... 4] – comp. SR
CF xxx Enter calibration slide filter time constant 2,4*)
xxx: 001 ... 120 [s]