ABB AP201, Руководство пользователя

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AP200 series
Rugged pH/Redox (ORP) sensor systems with rapid temperature response for critical processes 3 Electrical Installation
IM/AP200 Rev. S 11
3 Electrical Installation
3.1 Analyzer Connections
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
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:
1. an outer insulating layer
2. an inner braided shield
3. a shielded coaxial core
4. four insulated wires
Fig. 3.1 Cable Termination
pH
Redox (ORP)
Key
A A
B B
C C
D Reference electrode
E Measuring electrode
F Screen
G Solution earth (see
Note
below)
Temperature
compensator
Key
A Measuring electrode
B Reference electrode
Note. Do not allow the shielding to contact any other bare
wires.
Fig. 3.2 Shortening the Connection Cable
35 mm
(1.38 in.)
80 mm
(3.15 in.)
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.
A White
B Green
C Grey
D Blue
E Transparent
F Red
G Green/yellow
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.
A Transparent
B Blue