Electronics; Waters 2410 Differential Refractometer Optics Bench Assembly Light Path - Waters 2410 Operator's Manual

LED
1
LED Lens Dual-Element
Photodiode
Figure 1-8 Waters 2410 Differential Refractometer Optics Bench Assembly Light Path

1.3.3 Electronics

The 2410 refractometer has both analog and digital components, and includes hardware
such as the front panel keyboard and printed circuit (PC) boards and their
interconnections. The following PC boards are included in the 2410 refractometer
electronics.
• CPU Board – Provides the interface between the analog input signals from the
optics and the microprocessor, for further signal conditioning. Generates analog
output signals, drives the LED, Auto Zero, and signal compensation electronics, and
stores and executes input from the front panel keypad and the rear panel contact
closures. Provides communication between the 2410 refractometer and external
devices through the IEEE-488 interface and terminal strip input/output connections.
• Front Panel Board – Controls the keypad, indicators, and display.
• Power Distribution Board – Distributes DC voltages to the CPU board, fan, and
heaters. Provides the electronic switching for control of the oven compartment.
30 Waters 2410 Theory of Operation
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Heat Exchanger Coils Collimating Lens
LED
Lens Flow Cell
Mask
Mirror
TP01536