wtw Turb 2000 Series, Operating Manual

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Turb 2000 Series Routine maintenance
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9 Routine maintenance
9.1 Cleaning the flow through cuvette
Measurement cuvettes used for both grab sample and the flow through should be clean and free of
marks or scratches. Cleaning is accomplished by cleaning the interior and exterior with a detergent
solution (5 % acetic acid in the case of lime residues, washing-up liquid in the case of greasy residues),
and then rinsing several times with distilled or deionized water. The cuvette can be replaced by first
shutting off the flow using the provided shutoff clamp on the turbidimeter; unscrewing the old cuvette
and replacing with a fresh clean one.
9.2 Replacing or installing the desiccant pouch
HU
MO
NIT
OR
HUMONIT
OR
1
2
3
Figure 7: Desiccant pouch
1
Humidity indicator (Humonitor
®
card)
2 Replaceable desiccant pouch
3 Sensor bottom
For commissioning remove the transport protection (square-shaped plastic well with yellow flag) from
the sensor bottom.
The Turb 2000 continuously checks the condition of the desiccant. Replace the desiccant if the
instrument displays DESC in the lower display part (see section 6.14 D
ESICCANT ALARM
).
Proper use of the supplied desiccant is essential in maintaining the performance of the instrument. The
desiccant has been designed to have a long life; however, replacement of the desiccant pouch will be
required from time to time.
It is essential that all enclosure seals be maintained to ensure adequate desiccant life. Inspect these
items each time the desiccant pouch is replaced. Replace any parts found to be defective.
The desiccant should be replaced when the instrument displays DESC. A new sealed desiccant pouch
and indicator card are available from WTW. To initially install or remove the old desiccant, simply
unscrew the four corner thumbscrews and remove the electronics half of the instrument.