LaMotte LTC3000wi Turbidity & Chlorine Lab Meter - Manual (Page 82)

allowed to air-dry in an inverted position to prevent dust from entering
the tubes. Dry tubes should be stored with the caps on to prevent
contamination.
After a tube has been fi lled and capped, it should be held by the cap
and the outside surface should be wiped with a clean, lint-free absorbent
cloth until it is dry and smudge-free. Handling the tube only by the cap
will avoid problems from fi ngerprints. Always set the clean tube aside
on a clean surface that will not contaminate the tube. It is imperative that
the tubes and light chamber be clean and dry. The outside of the tubes
should be dried with a clean, lint-free cloth or disposable wipe before
they are placed in the meter chamber.
Tubes should be emptied and cleaned as soon as possible after reading
a sample to prevent deposition of particulates on the inside of the tubes.
When highly accurate results are required, reduce error by designating
tubes to be used only for very low turbidity and very high turbidity
testing.
Variability in the geometry of the glassware and technique is the
predominate cause of variability in results. Slight variations in wall
thickness and the diameter of the tubes may lead to slight variations in
the test results. To eliminate this error the tubes should be placed in the
chamber with the same orientation each time.
Chambers which have been scratched through excessive use should be
discarded and replaced with a new one.
MAINTENANCE
CLEANING
Clean the exterior housing with a damp, lint-free cloth. Do not allow
water to enter the light chamber or any other parts of the meter. To clean
the light chamber and optics area, point a can of compressed air into
the light chamber and blow the pressurized air into the light chamber.
Use a cotton swab dampened with Windex ® window cleaner to gently
swab the interior of the chamber. Do not use alcohol; it will leave a thin
residue over the optics when dry.
REPAIRS
Should it be necessary to return the meter for repair or servicing,
pack the meter carefully in a suitable container with adequate packing
material. A return authorization number must be obtained from LaMotte
Company by calling 800-344-3100 (US only) or 410-778-3100, faxing
410-778-6394 or emailing [email protected]. Often a problem can
be resolved over the phone or by email. If a return of the meter is
necessary, attach a letter with the return authorization number, meter
serial number, a brief description of problem and contact information
including phone and FAX numbers to the shipping carton. This
information will enable the service department to make the required
repairs more effi ciently.
METER DISPOSAL
Waste Electrical and Electronic Equipment (WEEE)
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