9
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Maintenance Schedule
Section
Section
Thermo Scientific
Orion 2295 Phosphate Analyzer
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61
Cleaning the Reaction Cell
Noisy or unstable readings may be caused by debris floating in the reaction cell or from deposits
on the optical windows inside the reaction cell. Check the reaction cell and clean as needed.
Make sure that the stir bar is clean and moving freely, all tubing is secured and in good
condition.
Cleaning the Sample Flow Chamber
It is recommended that you inspect the sample flow chamber at least once a year to check for
any flow blockage, and to inspect the operation of the float level sensor. The sample chamber is
located on the right lower corner of the fluidics enclosure.
The chamber can be removed for service and clean up.
CAUTION
Always wear protective equipment
Press STOP
➔
MENU
➔
MEASUREMENT
➔
CLEAN (flush the reaction
cell with sample)
Press STOP
➔
MENU
➔
SERVICES
➔
PRIME FLUIDICS
Set PRIME VOLUME to -5.0 ml and PRIME SAMPLE (note negative sign,
this will empty out the cell).
Remove reaction cell cap and deposit cleaning solution 2295CL into the
reaction cell, you can use a 10 ml syringe to fill the cell with cleaning solution
and let it soak for about ½ hour.
For a more thorough cleaning, swing the reaction cell down as shown in
photos below and use a non-fiber swab with a bent tip, reach inside the
reaction cell and wipe the side optical windows of the cell and the inner
surfaces to dislodge and remove any deposits.
Cleaning of the reaction cell should be performed monthly or as needed to
remove any debris or deposits that may be created by the reacted solution
or caused by the process sample. Deposits on the optical windows increase
the surface tension attracting small air bubbles generated from the chemical
reaction.
Note that if the analyzer is set for Auto-Restart you do NOT have to wait
after leaving the cleaning solution in the reaction cell, the analyzer will
automatically start running after ½ hour.
You may repeat the cleaning procedure as needed.
NOTE:
The reaction cell assembly can swing down to allow better access. Undo
both thumb screws and swing down.
