PART TWO - INSTALLATION
SECTION 3 - ELECTRICAL CONNECTIONS
Rev. 2-300
Accu4™ Low-range Turbidimeter System
25
S
ECTION
3
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3.1 GLI Model 8320
Low-range
Turbidity Sensor
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To access terminal blocks for electrical connections, open
the left-hinged enclosure door by unscrewing the four fas-
teners. Figure 2-8 or 2-9 shows the terminal block
arrangement and terminal designations inside the analyzer.
NOTE:
All terminals are suitable for single wires up to 14
AWG (2.5 mm
2
).
Wiring Tip!
To comply with European Community (CE)
electromagnetic compatibility requirements, follow these
general wiring guidelines:
1. Keep all cable shields as short as possible inside
the analyzer, and connect them to the ground termi-
nals provided. Performance may be improved by
using cable glands that enable the shield to directly
contact the analyzer chassis.
2. Use Steward ferrite 28 B0590-000 or equivalent on
the sensor cable -- two turns required.
3. In harsh conducted RF conditions, connect the earth
ground of the analyzer to a local, known earth
ground source.
NOTE:
For ease of wiring, route line power and relay out-
puts through the back conduit holes, and use the
front conduit holes for all other wiring.
The Model 8320 sensor is supplied with LED light source
and detector cables connected to its terminal board. Re-
move its protective cover to check that these cables have
not been accidentally disconnected during shipment (refer
to wiring diagram on inside of sensor enclosure door).
Wiring Tip!
Route the sensor cable in 1/2-inch,
grounded metal conduit to protect it from moisture,
electrical noise, and mechanical damage.
NOTE:
Do not route sensor cable in any conduit containing
AC power wiring (“electrical noise” may interfere
with sensor signal). Also, always re-calibrate the
system when the cable length between sensor and
analyzer changes.
ELECTRICAL CONNECTIONS
