ABB AP104 Руководство - Страница 11

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...2 INSTALLATION

2.4.4 Cable Termination – Fig. 2.11

Note. For AP102 Series Cable Attached, and AP104

Series Submersible cartridges, note the cable colours and

respective sleeves before proceeding.

If the provided standard length cable requires shortening, the

recommended preparation is as shown in Fig. 2.11.

Strip back the overall cable sheath to measurements as shown

and fit suitable solder tags and sleeves to the ends of all leads,

for connection to the transmitter.

35mm (1.4")

6 mm i.d Heat

Shrink Sleeving

Grey

Blue

30mm (1.2")

Wire, 16/0.2, PVC covered,

soldered to screen

3.2 mm i.d Heat Shrink Sleeving

Screen

Co-axial Cable Preparation

Fig. 2.11 Cable Preparation

35mm (1.4")

Co-ax Inner

35mm (1.4")

Trim back black conductive

layer to here

3 CALIBRATION

When the electrode system has been correctly connected and

all electrical connections made to the associated pH

transmitter, the system is ready for calibration by either

immersing the electrodes (using suitably sized beakers):

a) in a calibration solution (buffer) of known pH value for

a single-point calibration,

b) in two separate calibration solutions of known pH

values for a two point calibration.

For electrode systems in use:

1) Remove the electrode from the process or sample.

2) Wash the visible electrode surface with demineralised

water.

3) Proceed as described in the paragraph above.

Refer to the instruction manual for the pH transmitter for full

details of the calibration procedure.

Warning. Before removing any electrode from a flow line,

ensure that any isolating valves have been closed.

Caution. It is important when buffering to ensure that the

visible surface of the electrodes has been cleaned using

demineralised water. Also ensure when moving from one

buffer solution to the next to wash the electrodes and dry

them carefully using a soft tissue.