3
Measurement Angle range ±90°
Minimum display angle 0.0002°
Response speed 6°/sec.
Integration time 1∼100 sec.
Measurement accuracy ±0.002° (±1° or less), 0.2% (more than ±1°)
Measurement repeatability ±0.002°
Data modes Optical rotation, Specific optical rotation ,
Concentration, Sugar scale,
Brix purity, Optical purity
Data processing Edit data
Statistical calculation: average value,
standard deviation
coefficient of variation
Other functions Recognizes light source, Recognizes filter
External terminal External start, External auto zero
External output Analog output: ±1V±1%, full scale:1°, 10°, 100°
LC output: 0.5°→ 5V±3%：589 nm (Na)
Dimensions 563(W) ×350(D) ×210(H)mm
Weight 39.5 kg
Power requirements 100, 115, 200, 220, and 240 VAC ±10%,
50/60 Hz, 530 W
1.3 Hardware Structure
Figure 1.1 shows a block diagram of the polarimeter. Light from the light source
(lamp) passes through slit S, lens L, and filter F before entering polarizer P. The light
from the light source up through filter F is natural. This natural light is linearly
polarized by polarizer P. The linearly polarized light then passes through modulator
M, the sample chamber, and analyzer A before entering the photomultiplier tube PM
for detection.
The light incident on the detector (PM) is converted into an electrical signal, then
converted into a digital signal by the A/D converter for input to the microcomputer.
The signal processed by the microcomputer is output to the iRM display as optical
rotation, specific optical rotation, concentration, sugar scale, Brix purity or optical
purity according to the set data mode.
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