25
• 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
.
Note: DO NOT PLACE THE TIP INTO THE SAMPLE BEAKER.
PLACE THE TIP OVER A WASTE BEAKER. A SMALL
AMOUNT OF TITRANT IS DISPENSED WHEN THE PUMP
RESETS.
• Press
Start
to begin a titration.
• Wait for the syringe refill.
• Place the stir bar in the beaker and put the beaker into the
beaker holder.
• Place the probe holder on the top of the beaker and secure it by
turning clockwise.
• Rinse the ORP electrode with deionized water and immerse into
the sample until the Teflon reference junction is completely
submerged. Be sure that the tip of the electrode is not hitting
the stir bar.
• Insert the dosing tip into the titrant tube sleeve. IT IS CRITICAL
THAT THE TIP BE IMMERSED APPROXIMATELY 0.5 CM (0.1”)
INTO THE SOLUTION BEING TITRATED.
• Press
Continue
to begin the titration and
Stop
to abort it.
• At the end of the titration the instrument displays the concentration in ppm of SO
2
. The titration
curve can be viewed by pressing
Plot ON
. Press
Plot OFF
to exit this mode. For more information
about this feature, see page 23.
