Spectronic 20+ Series User Manual

Introduction
SPECTRONIC 2or series
The SPECTRONIC" 20D+ spectrophotometer (Cat.
Nos. 333183-000. 33'3183-02. 333183-04. 333183-05
or 333183-07). shown in Figure 1-2. is a single-beam
digital specb"ophotometer with a wavelength range of
340 nm to 950 nm. The nominal specb"al slit width of
20 nm is constant over the entire range.
7
5
6
3
4
2
81
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9
1
9
10
11
Figure 1-2
KEY
$PECI'RONIC 20D+ spectrophotometer
I. Sample compartment2.
Digital readout
3. Mode indicators4.
Mode selection
5. Decrease6.
Increase
7. Print
8. Wavelength control
9. Transmittance! Absorbance control (100% T lOA)10.
Power switch/Zero Control11.
Filter lever

Spectronic 20+ Series Specifications

General

Spectral Bandwidth	20 nm
Light Source	Tungsten lamp
Detector	Silicon photodiode
Wavelength Accuracy	±2 nm
Display	Digital display (Spectronic 20+)
Power Requirements	50/60 Hz
Sample Holder	Accommodates standard 10 mm square cuvettes