GE akta start Maintenance Manual page 70

5 Service and settings
5.4 UV Monitor
5.4.3 Flow cell path length
Instructions
Follow the instructions below to perform a Flow cell path length test and set a new cell
length.
Step
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Action
Flush the UV flow cell with demineralized water using the Pump, and then
leave the UV flow cell filled with water.
Tap Flow cell path length.
Result: The following screen opens.
Set the Cell value to 2.00 mm by using the up/down arrows or enter the
value in the text box.
Flush the UV flow cell thoroughly and leave it filled with demineralized water.
Tap Set baseline to capture a new reference value for the test.
Result: Abs should show a value close to 0 mAU.
Flush the UV flow cell with 1.0% acetone solution, and then leave it filled.
Note the new Abs value.
Calculate the actual Flow cell path length by using the following formula:
Cell (mm) = 2.00 * (new Abs value / 340 )
ÄKTA start Maintenance Manual 29-0603-08 AC