Metrohm 887 Professional UV/VIS Detector - Manual (Page 45)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭ 8 Technical specifications
887 Professional UV/VIS Detector ￭￭￭￭￭￭￭￭ 37
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
Measuring range
Absorbtion –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 data rate 1/s)
Drift
at reference
conditions 5 x 10 -4 AU/h
Wavelength range
wavelength
range
λ
190…900 nm
Wavelength
bunching
Δλ
1…limit nm (max. 101)
limit is 2 times the maximum number nm between the wavelength of
the corresponding channel and the nearest wavelength border.
Δλ is
always odd, since symmetrical around the wavelength of the corre-
sponding channel including the mean value.
Accuracy abso-
lute ± 3 nm
Stability ± 1 nm (over temperature range)
Optical resolu-
tion 5 nm (at 254 nm)
Measuring interval
Data rate for
each channel 0.5…50 Samples/sec