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INTRODUCTION
This manual describes how to install and operate the 9437
Low Level Dissolved Oxygen Monitoring system. Fig. 1.1
shows a schematic of the system.
The Dissolved Oxygen (D.O.) transmitters and associated
flowcell have been designed for continuous monitoring and
control of power station boiler feed water/steam condensate.
The 4641 transmitter is a wall-mounted instrument and the
4646 model is a panel-mounted,
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/
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DIN-sized instrument.
Both instruments have a single programmable D.O. input
channel, and a single temperature input channel. The sample
temperature is sensed by a Pt1000 resistance thermometer
incorporated in the flowcell.
Instrument operation and programming is via four tactile
membrane switches located on the front panel. Programmed
functions are protected from unauthorized alteration by a five-
digit security code.
Fig. 1.1 System Schematic
4600
ABB
Kent-Taylor
D.O.
µ
g/kg
18 . 1
A1
A2
4600
ABB
Kent-Taylor
D.O.
µ
g/kg
18 . 1
A1
A2
Model 4646
Panel-Mounted Transmitter
Model 4641
Wall-Mounted Transmitter
Flowcell Assembly
Sample
Flow
Upwards