Hanna Instruments HI 83226-01 User Manual

Page 7

on the tip of the syringe, if so eliminate them. Then, keeping the syringe in vertical position above
the cuvette, push the plunger down into the syringe until the lower edge of the seal is exactly on
the 0.5 mL mark. Now the exact amount of 0.5 mL has been added to the cuvette, even if the
tip still contains some solution.

USING LIQUID AND POWDER REAGENTS

• Proper use of the dropper:

(a) for reproducible results, tap the dropper on the table for several times and wipe the outside of the

dropper tip with a cloth.

(b) always keep the dropper bottle in a vertical position while dosing the reagent.

• Proper use of the powder reagent packet:

(a) use scissors to open the powder packet;
(b) push the edges of the packet to form a spout;
(c) pour out the content of the packet.

USING CUVETTES

• Proper mixing of the cuvette is done by

shaking the cuvette, moving the cuvette up and down. The

movement may be gentle or vigorous. This mixing method is indicated with “shake gently” or “shake
vigorously”, and one of the following icons:

• Pay attention to push the cuvette completely down in the holder and to align the white point on the

cap to the indexing mark on the meter.

• In order to avoid reagent leaking and to obtain more accurate

measurements, close the cuvette first with the supplied HDPE plastic
stopper

and then the black cap.

• Whenever the cuvette is placed into the measurement cell, it must

be dry outside, and free of fingerprints, oil or dirt. Wipe it
thoroughly with

HI 731318 or a lint-free cloth prior to insertion.

• Shaking the cuvette can generate bubbles in the sample, causing

higher readings. To obtain accurate measurements, remove such
bubbles by swirling or by gently tapping the cuvette.

• Do not let the reacted sample stand too long after reagent is

added. For best accuracy, respect the timings described in each

shake gently

shake vigorously

(a)

(b)