Hanna Instruments HI 84502 - Manual (Page 30)

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.