Hanna Instruments HI 84184 - Manual (Page 13)

13
MEASUREMENT PROCEDURE
• Fill the beaker up to the 50 mL mark with sample; add
10 mL of HI 84184-0 TISAB W/5, place the stir bar
into the beaker and then place the beaker in the
appropriate place on the instrument top.
• Place the electrode holder on the top of the beaker
and secure it by turning clockwise.
• Immerse HI 61010 fluoride electrode, HI 5315 reference
and the HI 7662-T temperature probe approximately 2
cm (0.8“) into the sample to be tested paying attention
to not touch the stir bar, and press Start.
• Wait until the reading is stable, CFM key displayed, if
the “Reading confirm” option is selected, and then
press CFM. If the “Reading confirm” option is
disabled the instrument automatically memorizes the
reading when this is stable and waits to add standard.
Until the standard addition is detected the instrument
will beep if beeper is enabled in Setup.
The instructions listed bellow should be carefully followed during analysis to ensure best accuracy.
• Rinse the electrode pair with distilled or deionised water between samples, and blot dry with
a lab wipe or other soft disponible absorbent toweling.
• Select the adequate stability criteria.
• Analyse the wine sample at room temperature.
TIPS FOR AN ACCURATE MEASUREMENT