Section 1 -Introduction
summarizes the specifications for the two current
models in the SPECTRONICBI 20 series.
The SPECTRONI~ 20 series of spectrophotometers
is one of the most widely used laboratory instruments.
Over the years, the series has been improved and now
includes the SPECTRONI~ 20+ and the
SPECTRONIC@ 200+.
Operational procedures for the SPECTRONICII 20 and
20D spectrophotometers are included in this manual.
This section describes these two latest instruments and
their basic operating features. The table below
Table 1-1 Specifications for SPECl'RONlCi> 20+ and SPECl'RONlCi> 20D+ Spectrophotometers
SPECTRONIC" 20D+
SPECTRONIC' 20+
SPECIFICA nONS
-
20nm
Specb'alslit width
340 to 950nm
Wavelen~~
:t:2.5nm near 525nm
Wavelength accur~~y
LED
%T, A, C, Factor,
Wavelenj!;th-
Display
Meter
51/2" mirrored scale
linear %T, non-linear A
0 to 100%T
0 to 1.95A
0 to 1999C
(0.1 to 1000 Factor)
0 to lOO%T
Oto2A
Photomenic range
j:2%T
Photometric acc~~-
:to.5%T
Photometric noise
O.5%T* from 340nm to 95Onm
--
Sb'ay r~iant energy-
1.0 VDC nominal at 100% T
RS-232C seri&l!9port
0 VDC nominal at lOO%T
Accessory output
!
OO/115.v. 50/60Hz; 22Q/240V. 50/60Hz
~ower req~e_nts
~5:'
W (41.3cm) x 8.5~21.6cm) x 1?:5" D (34.3cm)
Dimensions
-.
~et:
181bs. (~g)
~g~t
* When measured with ap(X"opriate accessory filter installed (Accessory Filter Kit 333129)
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