IM 12D7B2-E-H
1
1. INTRODUCTION
1-1. Application
The EXA SC200 transmitter is a 2-wire con-
ductivity instrument intended to be used in
industrial installations in the field. For easy
maintenance and operation it should be
located close to the sensors.
The cable length is limited to 10 metre.
It is powered from a remote low voltage DC
power supply through the 2-wire connec-
tion.
The EXA SC200 is compatible with most
commercial available conductivity sensors
and fitting systems.
The instrument is available in two versions:
- A general purpose version for use in safe
areas.
- An intrinsically safe version for use in
hazardous areas. The instrument can then
be installed in Zone 1 with the sensors in
Zone 0 or Zone 1.
The micro-processor is used in this instru-
ment for continuous loop diagnostics, flexi-
ble on site commissioning and fine tuning by
advanced functions.
In general a conductivity loop can be set up
for different purposes:
- To be part of a total process control sys-
tem.
- To indicate dangerous limits of a process.
- To monitor product quality.
1-2. Required components for
conductivity measurement
A. a conductivity sensor ( also called con-
ductivity cell) with integral temperature
sensor Ni-100 or Pt-1000.
B. a fitting for the above sensor with acces-
sories.
C. a signal cable with or without extension
boxes etc.
D. the EXA SC200 2-wire transmitter with
universal mounting accessory for wall,
pipe or panel mounting.
E. a DC power supply (nominal 24 V DC)
with cabling and optional zener barriers or
an intrinsic safe power supply.
F. peripherals: e.g. strip-chart recorder,
panel indicator, PID-controller
1-3. Identification
The instrument has an identification label,
which is fixed to the front plate.
This serves as a reference for the full model
code, power supply voltage and serial num-
ber. This label also carries authorised marks
to certify compliance with the current regu-
latory norms.
MODEL
SERIAL NO.
SUPPLY
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