Agilent Technologies 8453 User Manual, Installing And Operating Manual

Agilent 8453 Dissolution Testing System Installing and Operating Manual 105
Using the Valve Unit and Valve-pump Controller 4
Servicing Your Valve System
Position Encoder, 7-Segment Drivers, Position LED
An encoder wheel on the axis of the valve and three light switches provide a
three bit signal for the 8 possible positions of the valve. The actual position of
the valve is displayed on the front panel by the position LED which is driven
by 7-segment drivers. A fourth light switch is used to sense the fine
positioning (position line is “1” if setpoint position is reached). (These lines
can be accessed, opening the valve-pump controller-valve cable.)
7110
8111
Tab le 27 Encoder and Position Lines
Encoder
Bit 2
Encoder
Bit 1
Encoder
Bit 0
Position 1 0 0 0
2001
3010
4011
5100
6101
7110
8111
Tab le 26 Valve Position Lines (assuming the valve unit is connected and addressed)
(continued)
D2OUT
D2IN
D1OUT
D1IN
D0OUT
D0IN

Agilent Technologies 8453 Specifications

General

Brand	Agilent Technologies
Model	8453
Category	Laboratory Equipment
Language	English