Information for accurate measurements
54
Maintenance
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Cleaning the detector
Remove the cleaner, and clean the cell section of the detector with a soft brush, etc. When the
detector becomes soiled, errors caused by flaking dirt become larger at the time of zero
calibration. It is necessary to clean not only the optical path section but also the entire liquid
contact section of the detector.
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Cleaning the sampling piping
Dirt is gradually deposited in the sampling piping. If deposited dirt flakes off due to the
vibration of a pipe and the start and stop of a pump, etc., turbidity becomes higher.
Inject air into a pipe at regular intervals to remove all dirt.
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Replacing a zero calibration filter (if installed)
Provide a valve to prevent the outlet side of a filter for a turbidity of zero from coming contact
with a sample. Keep the valve closed during measurement. If the amount of filtration
decreases, replace the filter with a new one.
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Replacing the desiccant
The inside of the detector should be kept dry at all times. If the inside of the detector is in the
same condition as outside air, cold samples cannot be measured due to condensation.
The desiccant used for a detector can be replaced with a new one. The yearly periodic
replacement of desiccants is recommended. Moreover, when the case is opened, replace the
old desiccant with new desiccant.
The desiccant is a magnesium chloride and magnesium oxide compound. You can determine
if a new desiccant is still powdered or not by squeezing the desiccant bag between your
fingers. If a desiccant has absorbed moisture, it will become hard and expand.
Turn the knob for replacing desiccant, and replace the old desiccant with new desiccant.
Filter
Filter housing
Desiccant agent
Desiccant holder
