Model 202 Ozone Monitor Manual Rev. J-4
4
2.
MODEL 202 OZONE MONITOR SPECIFICATIONS
Measurement Principle
UV Absorption at 254 nm
Federal Equivalent
Method (FEM)
Yes, EQOA-0410-190
Linear Dynamic Range
0 ppb to 250 ppm
Resolution
0.1 ppb
Precision (1σ; rms noise)
Greater of 1.5 ppb or 2% of reading
(in 10-s measurement mode)
Limit of Detection (2σ)
3.0 ppb
(in 10-s measurement mode)
Accuracy
Greater of 1.5 ppb or 2% of reading
NIST-Traceable
Calibration
Yes
Measurement Interval
10 s (Data averaging options: 1 min, 5 min, 1 hr)
Flow Rate (nominal)
~1 Liter/min
Flow Rate Requirement
>0.6 L/min
Baseline Drift
<2 ppb/day
<5 ppb/year
Sensitivity Drift
<1%/day
<3%/year
Measurement Time,
Frequency
10 s, 0.1 Hz
Response Time, 100% of
Step Change
20 s, 2 points
Averaging Times
1 min, 5 min, 1 hr
Ozone Units
ppb, pphm, ppm, µg m
-3
, mg m
-3
Pressure Units
mbar, torr
Temperature Units
°C, K
T and P Corrected
Yes
Operating Temperature
Range
0 to 50°C standard; optional -20 to 50°C with low
temperature modifications (pump and lamp heater cold-
weather package)
