8 technical specifications, 1 reference conditions, 2 uv/vis detector – Metrohm 944 Professional UV/VIS Detector Vario User Manual
Page 43: Reference conditions, Uv/vis detector
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8 Technical specifications
944 Professional UV/VIS Detector Vario (2.944.0010)
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8 Technical specifications
8.1
Reference conditions
The technical specifications listed in this chapter refer to the following ref-
erence conditions:
Ambient tempera-
ture
+25 °C (± 3 °C)
Instrument status
> 30 min in operation with both lamps switched on.
8.2
UV/VIS detector
Detector type
Diode array
detector
512 diodes
Measuring range
Absorption
–2.0 - +2.0 AU
Number of
channels
8 measuring channels, 4 of them readable in analog mode
Resolution
2.5 x 10
–7
AU
Noise
2.5 x 10
–5
AU (at a 1/s data rate)
Drift
at reference
conditions
5 x 10
–4
AU/h
Wavelength range
Wavelength
range
λ
190 - 900 nm
Bandwidth
±1 - 50 nm
Accuracy, abso-
lute
±3 nm
Stability
±1 nm (across temperature range)
Optical resolu-
tion
5 nm (at 254 nm)
Measuring interval
Data rate for
each channel
0.5 - 50 samples/sec