Metrohm 944 Professional UV/VIS Detector Vario - Manual (Page 43)

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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