Xylem WTW DIQ/S 281, Руководство по эксплуатации

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DIQ/S 281 Overview
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1 Overview
1.1 Structure and function
One digital single sensor (one sensor for one main parameter) can be con-
nected to the universal transmitter DIQ/S 28X.
This means one main parameter (e.g. pH, D.O., turbidity value...) and one
secondary parameter in addition (e.g. temperature) can be displayed and
administrated.
Each sensor is automatically recognized after being connected and immediately
starts measuring.
The universal transmitter has two relay outputs and two current outputs to be
connected to existing process control systems.
Branches The DIQ/JB branching module (accessory) is a simple passive module for the
branching or extending of SNCIQ lines.
Relay and current
outputs The relay- and current outputs can be linked with the sensor. Linked outputs can
be used to monitor sensors and for the output of measured values.
A relay output can be programmed as:
 Monitoring relay
 Limit monitor
 Proportional output of measured values (pulse width or frequency output)
 Control unit of a sensor cleaning system driven by compressed air.
A current output can be programmed as:
 Analog output
 PID controller
Compressed air-
driven cleaning
system
The universal transmitter DIQ/S 28X is prepared for the compressed air-driven,
time-controlled sensor cleaning function. For this, a DIQ/CHV valve module and
if necessary a CH cleaning head is required (both available as accessories). The
cleaning procedure is controlled by the Universal Transmitter. The universal
transmitter provides the supply voltage and control relay for the compressed air
valve in the DIQ/CHV valve module. This enables a simple setup and uncompli-
cated wiring.
Suitable sensors for the universal transmitter DIQ/S 28X are listed
in the WTW catalog or on the Internet.