ABB AP120, Руководство пользователя

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11
3 ELECTRICAL INSTALLATION
3.1 Analyzer Connections – Fig. 3.1
System cable connections are identified in Fig. 3.1 to enable
connection to the appropriate terminal on the analyzer.
3.2 Shortening the Connection Cable – Fig. 3.2
The connection cable is supplied in various standard lengths. If
it is necessary to shorten the cable, prepare the cable ends as
shown in Fig. 3.2.
The cable comprises:
a) an outer insulating layer
b) an inner braided shield
c) a shielded coaxial core
d) four insulated wires
Note. Do not allow the shielding to contact any other
bare wires.
Fig. 3.1 Cable Termination
Measure the required length from
connector to transmitter and cut
accordingly.
Slit open and trim away the outer
cable insulation to expose
braiding.
Undo the braiding along the
complete exposed length and
twist into a single strand.
Shorten the twisted strand to
about 5mm (0.20 in.) and solder
on the insulated ground lead
extension (70mm [2.76 in.],
yellow/green). Protect the
connection with insulating tape.
Slit open and trim away the
insulation of the coaxial core.
a) Undo the exposed braided
shielding and twist into a
single strand.
b) Remove the black
semiconductor layer to
expose the pH signal
conductor.
a) Strip away the insulation from
the ends of the leads over a
length of 10mm (0.39 in.) and
fit end sleeves on the
individual wires.
b) Fit a heat-shrink sleeve or
insulating tape over the cable
end where the cable leads
emerge.
35 mm
(1.38 in.)
80 mm
(3.15 in.)
A White
B Green
C Grey
D Blue
E Transparent
F Red
G Green/yellow
Key
A A
B B
C C
D Reference electrode
E Measuring electrode
F Screen
G Solution earth (
see Note below
)
pH
Redox (ORP)
A Transparent
B Blue
Key
A Measuring electrode
B Reference electrode
Temperature
compensator
Fig. 3.2 Shortening the Connection Cable
Note. The sensor is equipped with a solution earth
(ground) which is designed to provide full sensor
diagnostics when connected to a suitable analyzer. If
sensor diagnostics are not required, it is not necessary
to connect the solution earth (ground).
Note. Cut off and discard remaining unused cores.