Ametek 931S, Operator'S Manual

Page: 26 / 268

2-2 | Model 931S / Model 932S UV Analyzers
Calibration
Calibration gases in nitrogen
Linearity
Typically <± 1.0 % of full-scale for H
2
S
Stability
Noise: <0.2 % full-scale of standard ranges
Cross-Talk
Model 932S Analyzers only:
Typically better than 1 % cross-interference between species used (appli-
cation specific).
Cross-talk adjustments should be made by factory-trained service
personnel only.
Temperature Drift
Model 931S Analyzers (at atmospheric pressure) :
H
2
S @ 228 nm = (40 PPM / Cell length) / °C
H
2
S @ 214 nm = (20 PPM / Cell length) / °C
SO
2
@ 285 nm = (30 PPM / Cell length) / °C
Model 932S Analyzers only (all specifications at atmospheric pressure) :
SO
2
= (40 PPM / Cell length) / °C
NO / NO
2
= (120 PPM / Cell length) / °C
NO
x
= (80 PPM / Cell length) / °C
COS = (80 PPM / Cell length) / °C
H
2
S @ 228 nm = (40 PPM / Cell length) / °C
H
2
S @ 214 nm = (20 PPM / Cell length) / °C
NH
3
= (40 PPM / Cell length) / °C

NOTE