13
Specifications
Performance Specifications
Photometric noise < 0.0002 AU rms Sixty consecutive scans on air with 0.5 s integration time at 0 AU, 500
nm; 11-point moving average: using equation:
Noise(rms)=SQRT((SUM(X-x)^2)/n) where x are measured values, X is
a 11-point moving average, n is the number of points
Photometric stability < 0.001 AU/h Scan on air at 0 AU, 340 nm, after 1-hour warm up, measured over 1
hour, every 60 s, integration time 5 s; difference between maximum
and minimum values are compared to specification; at constant
ambient temperature
Baseline flatness < 0.001 AU rms Scan on air at 0 AU, 340 nm, 0.5 s integration time
Typical scan time 1.5 s Full range
Shortest scan time 0.1 s Full range
Time until next scan 0.1 s Full range, 0.1 s scan, at least 150 consecutive scans
*
EP stands for European Pharmacopoeia
**
Apparent absorbance is strongly affected by dissolved oxygen. According to ASTM, bubble pure nitrogen through liquid for several minutes
immediately before use. Use only recently distilled water (not demineralized water).
Table 2 Performance Specifications, continued
Type Specification Comments
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