Signal Processing And Control System - Hitachi U-2910 Instruction Manual

2.3.2 Signal Processing and Control System

Monochromator section
Photometric
section
Light source
monochromator
I /O
interface
MPU
Input/output section
Figure 2-6 shows the signal processing and control system. This
system can be controlled either from keyboard or by an external
personal computer. The optical signal converted to an electric
signal by the detector is amplified and undergoes A/D conversion,
after which it is log-converted by the software and becomes
absorbance data. The result of measurement appears on the
LCD and is printed out from the printer.
Half mirror
+
Signal & data processing section
RAM
Battery
Fig. 2-6 Signal Processing and Control System
Sample
Detector
Detector
Parallel
interface
Printer
2 - 5
A/D
converter
RS-232C
serial
interface
Personal
computer
2.3.2