Hanna Instruments HI 84500 - Manual (Page 24)

24
• For best accuracy, before taking any measurement, ensure that the pump is calibrated on the
selected range following the “Pump Calibration Procedure” (see page 19).
• Select the corresponding range according to the table below:
TOTAL SO
2
MEASUREMENT PROCEDURE
e g n a R w o L
) e l p m a s L m 0 5 (
e g n a R h g i H
) e l p m a s L m 0 5 (
m p p 0 . 0 4 o t 0 . 1 m p p 0 0 4 o t 0 3
Low Range (Free & Total SO
2
) - 50 mL
High Range (Free & Total SO
2
) - 50 mL
Note: •The volume of wine added is critical to the measurement
accuracy. Pipettes are recommended.
•Failure to use a clean pipette will result in erroneous readings.
• Fill the 20 mL beaker up to the 5 mL mark with the HI 84500-61
Alkaline Reagent, add the contents to the 100 mL beaker containing
the sample.
• Cover the beaker, swirl and wait for 10 minutes.
• Fill the 20 mL beaker up to the 5 mL mark with the
HI 84500-60
Acid Reagent, add the contents to the 100 mL beaker containing
the sample.
• Add the contents of one packet of HI 84500-62 Stabilizer Packet
to the 100 mL beaker.
• Place the beaker into the beaker holder.
• Press Titrator.
• Ensure the pump is primed with the correct titrant for the selected range ( HI 84500-50 Low
Range Titrant or HI 84500-51 High Range Titrant).
Sample preparation: Use a clean pipette to precisely add the appropriate amount of wine
sample to a clean 100 mL beaker as indicated below:
• This error message appears when the pump is not working properly. Check the tubing, valve
and syringe. Press Restart to try again.