Hanna-instruments HI 84502 Manual do Utilizador descarregar pdf (Página 30)

TIPS FOR AN ACCURATE MEASUREMENT

The instructions listed below should be followed carefully to ensure measurements are conducted

with the highest possible accuracy and precision.

• IT IS CRITICAL THAT THE TIP BE IMMERSED IN THE SOLUTION BEING TITRATED

(APPROXIMATELY 0.25 CM).

• Use a clean, volumetric pipette to measure and transfer the necessary volume of wine sample

into the titration beaker.

• Calibrate the pump prior to each series of titrations.

• Calibrate the pump if the meter is left idle for several hours.

• Analyze the wine sample immediately after it is obtained.

• Clean the electrode with HI 700635 or HI 700636 cleaning solutions specially designed for

the wine industry.

• Press Restart to begin a new titration or ESC to return to the titration menu.

• If the concentration exceeds the range limits

(> 5.0 g/L for Low Range, > 25.0 g/L for

High Range) the exceeded range limit will be

displayed blinking. Another titration can be

started by pressing Restart.

• “Wrong input” error message appears when

the input reading (pH, temperature) exceeds the

specified limits. The pH or temperature value

and the concentration will blink indicating an

error.

• This screen appears when the stirrer is not

working properly. Check the stir bar and beaker

content. Press Restart to try again.

• This error message appears when the pump is not

working properly. Check the tubing, valve and

syringe. Press Restart to try again.

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Hanna-instruments HI 84502 Manual do Utilizador Página 30