English (GB)
14
12. Maintenance
Interval for functional check
• At least once a week.
Interval for cleaning
• Whenever faults occur.
• Every 6 months.
Interval for replacing the electrolyte
• Every 6 months.
12.1 Functional check
Calibration check
• Recalibrate the measuring cell with an analytically determined
value at least once a week.
Observe section
and the Oxiperm Pro installation
and operating instructions.
Sample water flow check
• Check and, if necessary, adjust the sample water flow rate
through the measuring cell.
Functional check of the measuring module
• Check the bypass for leaks.
• Check the circulating pump for noisy operation.
12.2 Cleaning
To check the fill level of the electrolyte or clean the measuring cell
in the event of malfunctions, the electrolyte chamber must first be
unscrewed.
When cleaning, the following cleaning steps are performed in
sequence.
Please also refer to the measuring cell graphic in section
7.2 Design of the measuring cell
12.2.1 Switching off the measuring cell
1. Switch off the power supply. If this is not possible, remove the
cable on the measuring cell.
2. Switch off the sample water supply.
12.2.2 Removing the measuring cell
1. Remove the measuring cell from the flow fitting.
12.2.3 Cleaning the electrolyte chamber
1. Unscrew the electrolyte chamber.
In the event of limescale deposits:
2. Soak the electrolyte chamber for a few hours in approximately
1 % hydrochloric acid until clean.
3. Rinse with clean water.
12.2.4 Cleaning the electrode
In the event of heavy soiling, the electrode must be cleaned.
1. Rinse the electrode finger (= measuring electrode) with clean
water, and then dry it with a clean paper towel.
2. Use the special emery paper provided to carefully clean the
gold tip of the dry electrode finger.
– Place the emery paper on a dry paper towel, and hold the
edge of the emery paper.
– Hold the measuring cell vertically, and then rub the tip of the
electrode carefully over the emery paper two or three times.
12.2.5 Filling up with electrolyte
1. Screw the electrolyte chamber onto the measuring cell so that
the socket of the electrolyte flange just fits into the gap
(approximately 5 mm).
2. Fill electrolyte right up to the overflow, making sure there are
no bubbles.
3. Screw on and tighten the electrolyte chamber by hand.
– There must not be any air bubbles in the electrolyte
chamber.
– The electrolyte is considered safe to handle.
12.2.6 Screwing on the measuring cell
Please refer to section
9.3 Preparing the measuring system
.
12.2.7 Starting up the measuring system after it has been out
of service
Please refer to section
9.4 Starting up the measuring system
• For details on recalibration, please refer to section
.
13. Spare parts
Accessories and wear parts
14. Disposal
This product or parts of it must be disposed of in an
environmentally sound way. Use appropriate waste collection
services. If this is not possible, contact the nearest Grundfos
company or service workshop.
Caution
Always recalibrate the measuring system after
cleaning or maintenance has been performed!
Caution
The emery paper should only be used to clean the
precious metal tip (gold) on the electrode tip of
soiling. The remaining surface (metal coating) of the
electrode finger must not be sanded or removed!
Caution
Do not use any other kind of electrolyte! Damaging
the electrode by using the wrong kind of liquid voids
all warranty claims!
Description
Product number
Measuring cell
95708117 (314-180)
Spare parts set, consisting of
electrolyte and emery
95708819 (553-1758)
Connecting cable for measuring
cell, 2 metres
91835331 (45.10124)
Connecting cable for measuring
cell, 5 metres
95708119 (45.10124/5)
Connecting cable for measuring
cell, 10 metres
95708120 (45.10124/10)
UPS 25-60N circulator pump
96913085 (53.650-1)
HD-PE hose 6/8 mm, 2 metres
95709109 (526-011/2)
HD-PE hose 6/8 mm, 5 metres
95709110 (526-011/5)
HD-PE hose 6/8 mm, 10 metres
95709108 (526-011/10)
Note
The measuring module and its associated parts must
be disposed of in an environmentally sound
way!
The system may only be dismantled by authorised
and qualified personnel!
The operator is responsible for
environmentally-friendly disposal!
Summary of Contents for AQC-D6
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