Nova-Tech AutoDosage - Handbuch (Seite 9)

The quartz wedge principle
The ORD (optical rotatory dispension) of a quartz is identical
to the ORD of a sucrose solution. The idea to compensate
the rotation of a sucrose solution by positioning of a quartz
led to the development of the quartz wedge compensation
principle.
The Saccharomat
® works with a quartz wedge, sliding in
the optical light path. Polariser and analyser are fixed at an
angle of 90°. The instrument measures the path of the
quartz wedge, compensating the rotation of the sample.
Instead of the angular encoder of a circle polarimeter, the
Saccharomat
® works with a linear encoding system.
Since the quartz and the sample have an almost identical
reaction to slight changes of the wavelength, these are
having no impact on the results.
Technical Data
Measuring range: -35 to +105°Z
Resolution: 0.01°Z
Precision: ± 0.02°Z
Light source / Lifetime: LED / 50,000 h
Wavelengths:
Model 103: 587 / 589 nm
Model 101: 882 nm
Model 202: 587 / 589 and 882 nm
Polarimeter tubes: 50 / 100 / 200 mm
Operating temperature: +10°C to +40°C, automatic
temperature compensation when
using a temperature-tube
Measuring time: ≤ 4 sec. over the entire meas. range
Display: Graphics-LCD, 16 x 16 characters
Interfaces: 2x RS232, 1x parallel, 1x PS2,
1x USB (opt.)
Dimensions: 733 x 160 x 365 mm (WxHxD)
Weight: Approx. 28 kg
Standards: ICUMSA, O.I.M.L.,
Australian Standard K 157