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OPM223/253
Field instrument measuring cable connection
Proceed as follows to connect a pH-electrode to the field instrument:
1.
Open the housing cover to access the terminal block in the connection compartment.
2.
Break the punching of a cable gland from the housing, mount a PG gland and guide the
cable through this Pg gland.
3.
Connect the cable in accordance with the terminal assignment .
4.
Tighten the Pg gland.
"
Caution!
Make sure to protect the connectors, cable ends and terminals against moisture as this could
result in incorrect measurement!
Panel-mounted instrument measuring cable connection
To connect a pH electrode to the panel-mounted instrument, connect the cable in accordance
with the terminal assignment to the terminals on the rear of the device.
If you are using glass electrodes with the panel-mounted instrument, you have to terminate the
measuring cable with a BNC connector. A solder-free BNC connector is supplied with the
device.
Proceed as follows:
1. Cut off end sleeves 2 and 3 of the coaxial
cable (Fig. 13).
2. Push the cable gland 5 and the washer 6
onto the coaxial cable.
3. Remove the insulation (13 mm(0.51"))
and screw the clamping ring 7 onto the
insulation.
!
Parts 5 to 7 are supplied with the BNC
connector for cable diameters 3.2 mm
(0.13") and 5 mm (0.20").
4. Fold the braided screen 8 of the screen
over the clamping ring and cut off the
excess material.
5. There is a semi-conductor layer 14
(conductive foil) between the inner
insulation and the braided screen 8. Strip
this semi-conductor layer to the braided
screen.
Note!
1
Fig. 13:
Cable OPK1: device connection
1
Coaxial cable
2
Inner screen BK (ref.)
3
Inner coax (pH / mV)
4
Strand BN (PM)
5
6
5
6
13 / 0.51
16 / 0.63
14
Fig. 14:
Terminating the pH connecting cable for
mounting the BNC elbow plug
Wiring
2
3
4
C07-OPM223xx-04-06-00-xx-013.eps
7
8
C07-OPM223xx-04-06-00-en-014.eps
19
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