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Teledyne API Model 401 O
3
Photometric Calibrator Instruction Manual, 01124, Rev. J2
1.4.1 Noise (PPB RMS)
The standard deviation of reported concentration calculated over 25 samples times 7 runs
minimum, N-1 weighted.
1.4.2 Lower Detectable Limit (LDL) PPB
LDL is defined as twice the (RMS) noise at the lower end of the most sensitive operating range.
1.4.3 Zero Drift (PPB)
Zero drift is defined as unadjusted (automatic) operation maximum shift over the given period at
constant temperature and pressure.
1.4.4 Span Drift
Span drift is defined similarly to zero drift, requiring unadjusted operation at constant
temperature and pressure.
1.4.5 Linearity
< 1.0% of URL, best-straight-line deviation over range of LDL to URL.
1.4.6 Lag Time
Lag time is defined as the time interval between a step change, at the sample inlet port, of input
concentration and the first observable corresponding change in analyzer output.
1.4.7 Rise And Fall Times
Rise/fall times are defined as the time interval between a step change in input concentration and
95% of final response unless otherwise noted.
1.4.8 Temperature Range
5-40° C.
1.4.9 Humidity Range
0 to 95% relative humidity, non-condensing.
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