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Problem
The instrument
There is a leak in one of the reagent
reading is high.
delivery valves.
The quantity of reagent that is supplied
to the sample cell is incorrect.
The reagent blank value in the
REAGENTS/STANDARDS menu is
different from the value on the
R1 (molybdate reagent) bottle.
There is a blue stain on the sample cell.
The instrument
There is a leak in one of the reagent
readings are not
delivery valves.
stable.
The quantity of reagent that is supplied
to the sample cell is incorrect.
There are bubbles in the sample cell.
There are bubbles on the stir bar.
There is a blue stain on the sample cell.
Reagent
A bottle cap is not on tightly or does not
pressure is low.
make a good seal.
There is a leak or a bad seal in one of
the reagent bottles or tubes.
Diagnostic test for reagent delivery valves
1. Remove power to the analyzer. Keep the sample and reagent bottles pressurized.
2. Remove the cover from the sample cell.
3. Dry the tubes that are attached to the sample cell cover.
4. Hold the sample cell cover above a dry towel for a minimum of 10 minutes. Make sure that the
tubes do not touch the towel.
5. After 10 minutes, look for fluid to fall from a tube. If fluid falls from a tube, there is a leak in the
valve that is plumbed to the tube.
Diagnostic test for reagent delivery
1. Push diag, then select PERFORM TEST>REAGENT DELIVERY.
2. Set each reagent valve to supply 2000 µL (2 mL).
Possible cause
Solution
Complete the diagnostic test for reagent delivery
valves. Refer to
Diagnostic test for reagent delivery
valves
on page 11. If a leak is found, replace the
applicable reagent delivery valve.
Complete the diagnostic test for reagent delivery.
Refer to
Diagnostic test for reagent delivery
on page 11. If the reagent delivery is incorrect,
look for a blockage in the tubing or replace the
applicable solenoid valve.
Change the reagent blank value in the
REAGENTS/STANDARDS menu to show the value
that is on the R1 reagent bottle.
Replace the sample cell. Use the reagent set with
the modified R2 (citric acid) reagent.
Complete the diagnostic test for reagent delivery
valves. Refer to
Diagnostic test for reagent delivery
valves
on page 11. If a leak is found, replace the
applicable reagent delivery valve.
Complete the diagnostic test for reagent delivery.
Refer to
Diagnostic test for reagent delivery
on page 11. If the reagent delivery is incorrect,
look for a blockage in the tubing or replace the
applicable solenoid valve.
Look for bubbles in the sample cell. If there are
bubbles in the sample cell, rinse the sample cell. If
the readings do not become stable, replace the
sample cell.
Look for bubbles on the stir bar. If there are bubbles
on the stir bar, replace the stir bar.
Replace the sample cell. Use the reagent set with
the modified R2 (citric acid) reagent.
Remove the bottle caps. Clean the rim of the
bottles. Examine the inner surfaces of the bottle
caps for unwanted material. Fully tighten the bottle
caps on the bottles. Make sure the fittings are tight
on top of the bottle caps.
Complete the diagnostic test for low reagent
pressure. Refer to
Diagnostic test for low reagent
pressure
on page 12.
English 11
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