Hanna Instruments HI 84100 - Manual (Page 12)

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This error message appears during pump calibration when the
equivalence point can not be reached. Change the pump calibration
standard and try again.
The calibration process was attempted using the wrong standard
solution.
This error message appears when the input reading (mV) exceeds
the input limits (0
This screen appears when the minititrator enters TITRATION mode.
Press the START STOP button to stop the titration and return to the
main screen.
TITRATION MESSAGES
The titration result, expressed as the concentration of sulphur dioxide
in ppm (mg/L), is displayed at the end of the titration process. Press
the START STOP button to return to the main screen.
This error message appears when the input reading (mV) exceeds
the input limits (0and (0
This screen appears when the sample concentration exceeds
400 ppm.
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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 APPROXIMATELY 1.5 CM INTO THE SOLUTION
BEING TITRATED.
• Use a clean, volumetric pipette to measure and transfer the 50 mL wine samples into the
titration beaker.
• The peristaltic pump must be allowed to complete a full 5 minutes purging cycle prior to
performing a pump calibration.
• Calibrate the peristaltic pump prior to each series of measurements.
• Calibrate the peristaltic pump if the meter is left idle for several hours.
• Analyze the wine sample immediately after the sample is obtained.
• Clean the electrode with HI 700635 or HI 700636 cleaning solutions specially designed for
the wine industry.
TIPS FOR AN ACCURATE MEASUREMENT
PUMP CALIBRATION PROCEDURE
Attention: Pump calibration must be performed each time the pump tube, the reagent bottle or the
ORP electrode is changed. A pump calibration is recomended before each set of measurements or
after the titrator is left idle for several hours.
• Using a clean pipette, fill the 50 mL beaker up to
the 50 mL mark with HI 84100-55 Standard.
Note: Failure to use clean pipettes will result in
erroneus readings.
• Place the stir bar in the beaker and put the beaker
in the minititrator top.
• Place the beaker into the beaker holder.
• Place the probe holder on the top of the beaker and
secure by turning clockwise.