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DOTX-45 - 4 -

Part 1 - Introduction

1.1 General

The Model DOTX-45 is a highly versatile on-line monitoring system designed for

the continuous measurement of dissolved oxygen in solution. The full scale

operating range of the system 0-40 ppm, and the sensing system will operate on

water streams with temperatures ranging from 0 to 50°C.

The basic sensing element used in the dissolved oxygen monitor is a galvanic

membrane sensor which measures oxygen directly.

Monitors are available in two electronic versions, a loop-powered 2-wire

transmitter or an AC powered monitor with integral alarm relays and dual 4-20

mA output capability.

1.2 Standard System

The standard model DOTX-45 system includes two components, the dissolved

oxygen analyzer and a dissolved oxygen sensor. For connection of the sensor to

the electronics, a 25' cable is supplied. Up to an additional 1000 feet of

interconnect cable may be added using a junction box. All required spare parts

are also provided with the basic system, including spare membranes, electrolyte,

and o-rings.

1.3 Features

• Standard electronic transmitters are designed to be a fully isolated, loop powered

instruments for 2-wire DC applications. Optional integral power supply card for

115 VAC operation is available.

• High accuracy, high sensitivity system, measures from 0.1 ppm to 40.0 ppm

through 2 internal automatic ranges.

• Output Hold, Output Simulate, Output Alarm, and Output Delay Functions. All

forced changes in output condition include bumpless transfer to provide gradual

return to on-line signal levels and to avoid system control shocks on both analog

outputs.

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Dot-x SERIES Spezifikationen Seite 5