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"FX-1000p Cleaning Electrode"

Foxcroft Equipment and Service Co., Inc.

2101 Creek Road

Glen Moore, PA  19343  USA

610-942-2888

FAX 610-942-2769

email sales@foxcroft.com

Cleaning The Copper Electrode

Always polish the copper electrode ring whenever the electrode is:

1.  Exposed to the atmosphere for more than a week (oxide/tarnish buildup occurs on new or out of service systems).

2.  Used for about 12 months of normal operation (electrode usually oxidizes/tarnishes enough during this periods to degrade measurement performance.

3.  Acquires a precipitate buildup due to sample characteristics such as high calcium.

Follow these steps to clean the copper electrode.

1.  Turn off the line power and stop the sample flow to the system.

2.  Disconnect the wires from the copper electrode ring and the gold electrode. 

3.  While holding the bottom block of the flow cell, unfasten and remove the four bottom screws of the assembly.

4.  While holding the bottom block of the flow cell, unfasten and remove the four bottom screws of the assembly.

Do not loosen or remove the fastener centered between the four bottom screws.  This could damage the expensive gold electrode that is press fit, and specially sealed onto the lower block.

5.  Carefully pull the bottom block, together with the copper electrode ring, down from the top block.  This should help prevent losing any of the 150 small PVC mixing balls contained within the copper ring electrode.  (During removal, be careful not to lose the O-rings that seals the top edge of the copper electrode ring to the top block of the flow cell.)

6.  Pour the PVC balls into a container.

7.  Remove and set aside the upper and lower O-ring seals.  If they are damaged, replace them.

8.  Use medium sandpaper (100 grit) or Scotch Brite pad to shine the inner surface of the copper electrode ring.  (Do not use any commercial abrasive cleaning powders or liquid, as they contain chlorine and will leave a residual coating that will adversely affect system performance.)  If the copper electrode ring is excessively scratched or has an uneven surface, it should be replaced.

9.  Check the PVC balls for flat spots or dents.  Replace any damaged balls.

10.  Check the flow nozzle orifice for any precipitate buildup or obstructions, and clean if necessary.

11.  Remove the flushing plug and check for any precipitate buildup or obstructions, and clean if necessary.

12.  Re-assemble the sample flow cell.