4690 Series
Turbidity systems 8 Configuration and Electrical Calibration
28 IM/4690–EN Rev. A
Continued from previous page
Cleaning Interval
Note. Displayed only if
Sensor Type is set to 7998-001, 7998-002, 7998-011 or 7998-012
Using the and keys, select the cleaning interval required. Values available are: 15 mins,
30 mins, 45 mins, 1 hr, then 1 hour increments to a maximum of 24 hours.
Test Cleaner
Note. Displayed only if
Sensor Type is set to 7998-001, 7998-002, 7998-011 or 7998-012
Select YES to activate the wiper unit diagnostics function and enable visual indication of wiper unit
function.
Select No to deactivate the wiper unit diagnostics function.
Bubble Rejection
Use in applications where degassing of the sample takes place.
When set to YES, the analyzer ignores short duration spikes in the turbidity reading caused by the
formation of small bubbles in the flowcell due to degassing.
Bubble Period
Note. Displayed only if Bubble Rej. is set to YES
Using the and keys, adjust the value to between 2 and 60 seconds until short duration
spikes are no longer seen on the display.
Note. A value of 20 seconds is normally sufficient for most applications.
Signal Filter
Use in applications where the turbidity readings are noisy.
Using the and keys, adjust the value to between 4 and 180 seconds.
Note. If Bubble Rej. is set to YES, set a value of 4 seconds for optimum performance.
Advance to Set Up Outputs page – see Section 8.4, page 29.
YES
Test Cleaner NO
YES
13
Clean Int. (Hr)
SET UP OUTPUTS
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Bubble Rej. NO
Bubble Period
20
Signal Filter
20
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