Contaminants
Solution
Microbiological (green)
growths
Soak the cell with 30 to 50 mL of 70% or 90% isopropyl alcohol or dilute with
solutions of household chlorine bleach (5.25% available chlorine). Dilute the bleach
approximately 1:1000 (1 mL bleach to 1 liter of water) to prepare a 50 mg/L
cleaning solution. Use stronger bleach solutions to remove severe growths. Soak
the cell with 30 to 50 mL of the bleach solution. Rinse with clean water.
Red mineral deposits (iron,
etc.)
Soak the cell with an iron-reducing agent then flush the cell with water.
Calcium (white) deposits
Soak the cell with white vinegar or phosphoric acid then flush the cell with water.
Mild manganese stains
(purple or black)
Soak the cell with a solution (by volume) of
1
/
3
water,
1
/
3
white vinegar, and
1
/
3
hydrogen peroxide; flush the cell with water.
Strong manganese stains
Soak the cell with a solution by volume of 70% white vinegar and 30% hydrogen
peroxide (3% strength).
3.
Connect the instrument to the flow path again and set the instrument power to on.
4.
If the clean sensor fail indicator is still on, soak the cell for a longer period of time or use a
different solution.
Contact technical support for more information.
Replace the flow cell
The flow cell is not user replaceable. Contact technical support for replacement.
Replace the tubing
If the sample conditions are bad, change the tubing as often as necessary. Refer to
Maintenance
schedule
on page 21 for recommendations for the tubing change.
Prepare the instrument for long-term storage or shipping
N O T I C E
Potential instrument damage. Drain all water from the unit before shipment to prevent damage from freezing
temperatures.
Fully clean the instrument for long-term storage (more than 2 weeks) or shipment.
1.
Clean the sensor with the supplied cleaning solution. Refer to
Clean the cell
on page 21.
2.
Flush approximately 30 mL of isopropyl alcohol through the instrument to remove all water. Make
sure that no water is left in the instrument. Water spots can dry on the cell windows and can be
difficult to remove.
English
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