Technical Data
85
Ordinate
Photometric range Transmission 0% to 100%
Absorbance –6.000 to 6.000 (display range)
1 to 9999 (concentration units)
Photometric accuracy Absorbance ±0.003
(measured at Absorbance = 1 at 440 nm, 546.1 nm and
630 nm with NIST 930 filters)
Absorbance ±0.015
(measured at Absorbance = 1, at 257 nm and 350 nm
with potassium dichromate solution
*
)
Stray radiation Transmission < 0.02%
(at 220 nm, 340 nm and 370 nm)
Absorbance > 2
(measured at 200 nm with potassium chloride solution
†
against distilled water)
Baseline linearity 1 nm slit: Absorbance ±0.001
2 nm slit: Absorbance ±0.0005
(corrected: 200 nm to 100 nm, scan speed 240 nm/min,
smooth 2)
Baseline noise 1 nm slit:
Absorbance < 0.00008 RMS,
Absorbance < 0.0003 peak-to-peak
3 min at absorbance = 0, wavelength 500 nm and
response 2 s)
*
β(K
2
Cr
2
O
7
) = 60.06 µg/mL ±0.5% in sulfuric acid c(H
2
SO
4
) = 0.005 mol/L
†
β(KC1)= 12 mg/mL ±0.5%
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