Hanna Instruments HI 84100 - Manual (Page 11)

11
GUIDE TO DISPLAY CODES
Main screen display with stirrer active.
Main screen display.
This prompt appears for a few seconds each time the instrument
is turned ON.
This screen appears when the meter enters pump calibration
mode. Pump calibration is initiated by pressing the START STOP
button.
This screen appears while pump calibration is in progress. Pressing
CAL PUMP or START STOP button, the minititrator returns to the
main screen.
This screen appears when pump calibration is complete.
Purging mode message.
PUMP CALIBRATION MESSAGES
14
• Rinse the ORP electrode with deionized water, open
the refill cap and immerse into the stirring sample
until the teflon reference junction is completely
submerged. Be sure that the tip of the electrode is
not in the path of the stir bar.
• Purge the titrant into a waste beaker for 1-2 seconds
to ensure that the dosing tip is filled with fresh
titrant solution.
• Insert the dosing tip into the titrant tube sleeve. IT
IS CRITICAL THAT THE TIP BE IMMERSED
APPROXIMATELY 1.5 CM (0.6”) INTO THE SOLUTION
BEING TITRATED.
• Fill the 20 mL beaker up to the 5 mL mark with the
HI 84100-53 Acid Reagent and add the content to
the 50 mL beaker.
• Add the contents of one packet of HI 84100-54
powder Stabilizer to the sample beaker.
• Press CAL PUMP button “STD” will appear on display.
• Press START STOP in order to start the system
calibration.
• At the end of the calibration, DONE appears for a
few seconds and the meter returns to the measurement
mode.
• Promptly remove the probe and dispensing tip from
the sample solution and rinse with deionized water.