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TIPS FOR ACCURATE OPERATION
The instructions listed below should be carefully followed during testing and during
calibration.
• All glassware that comes into contact with standards should be maintained
clean. Wash with
HI93703-50
cleaning solution and rinse with
HI 93124-0
or turbidity free water.
• For consistent readings, it is recommended to perform measurement immediately
after collecting sample.
• To obtain a representative sample, gently mix the liquid before samples are
taken. Do not shake (to prevent air bubbles) and do not let the sample settle.
• Rinse the cuvette twice with 5 ml of the liquid to be tested for removing the effect
of dust or any previous liquid. Gently pour the liquid down the side of the cuvette
to reduce air bubbles.
• Try to tighten the cuvette cap always to the same degree.
• Before inserting the cuvette into the instrument, wipe it with soft, lint-free tissue.
Handle cuvettes so that no fingerprints can get on the areas where light passes
(approximately 2 cm/1 inch from the bottom of the cuvette).
• Discard the sample soon after the reading is taken to avoid permanently clouding
the glass.
If any problem is experienced during measurements, please contact your dealer or
the nearest Hanna Instruments Customer Service Department.
LCD ERROR CODES
Every time the meter is switched on, the RTC (Real Time Clock) and the internal
memory (EEPROM) are tested.
If an error occurs, the corresponding error code will be displayed.
Here below are listed the error codes:
•
No cover error; check cuvette position
•
Calibration error; check calibration standard
solution
•
Real Time Clock error (*)
•
EEPROM error (*)
•
Internal communication error (*)
•
Internal Bus error (*)
(*) Contact the nearest Hanna Instruments Customer Service Department.
