Diagnostic Table; Bubbles In The Sample - Xylem WTW Turb PLUS 2000 Operating Manual

Troubleshooting

Diagnostic Table

Symptom
Lower display shows MA
Lower display shows DESC
Lower display shows LAMP
Lower display shows FLOW
Lower display shows FAIL
Lower display shows CLN
Upper display shows FILE
Readings are higher than expected
Readings are erratic
Readings are lower than expected
Upper display flashes

Bubbles in the Sample

If bubbles are present in the sample water the readings may appear higher than expected. These
reading may also not be stable.
Remove cuvette if air can be seen coming into the flow-through unit from the inlet tube, this is air
introduced, probably from a small water or air leak. This will need to be resolved in the plumbing.
If air cannot be seen entering the intake tube but appears on the inside of the glass cuvette, it is
coming out of solution. This can usually be cured by applying pressure to the rotary backpressure
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Cause
4-20 mA loop open
Desiccant pouch bad
Lamp failed
Flow option error
Sample flow has stopped
Major system fault
Ultrasonic cuvette not found
Update not possible because
new file not found
Bubbles in solution
Condensate or leaky cuvette
Flow through cuvette dirty
Instrument out of calibration
Bubbles in solution
Debris in flow through
Instrument out of calibration
Sample Over-Range
Turb PLUS 2000
Cure
Check wiring. See sections 5.4.2
and 6.2.1
Change desiccant pouch. See
section 7.1
Replace lamp. See section 7.8
Restore flow. Contact HF about
factory installed option
See section 8.1.3
Either turn off the CLN in CONFIG
or check/replace the ultrasonic
cuvette. See Sections 6.2.11 & 7.5
Check USB flash drive.
See section 6.2.18
Apply backpressure. See section
8.3 and figure 4.
For severe cases of bubbles, a
stilling chamber is available. Call
Xylem Analytics Germany.
Check flow-through cuvette for
condensate or leaks. Change
desiccant if needed.
Clean cuvette. See section 7.7
Recalibrate. See section 6.3
See above
Clean debris from cuvette
Recalibrate. See section 6.3
Check sample. Sample may be too
high to read.
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