Hanna-instruments HI 98103 User Manual download pdf (Page 2)

INITIAL PREPARATION

The pH electrode is shipped dry. Before using

the Checker

®

, remove the protective cap and

condition the electrode by soaking the tip (bot-

tom 4 cm/1½") in pH 7.01 buffer solution for a

couple of hours. Then follow the calibration

procedure.

OPERATION

• Do not be alarmed if white crystals appear

around the cap. This is normal with pH elec-

trodes and they dissolve when rinsed with

water.

• Connect the electrode to the meter.

• Turn the Checker

®

on by sliding the switch

on the top.

• Remove the protective cap and immerse the

tip of the electrode (bottom 4cm/1½") in the

sample to be tested.

• Stir gently and wait for stable reading.

NEVER IMMERSE THE ELECTRODE OVER

THE MAXIMUM IMMERSION LEVEL. THE

CONNECTOR MUST BE ALWAYS CLEAN

AND DRY.

• After use, rinse the electrode

with water and store it with

a few drops of HI70300

storage solution in the pro-

tective cap.

DO NOT USE DISTILLED OR DEIONIZED WA-

TER FOR STORAGE PURPOSES.

• Always replace the protective cap after use.

BATTERY REPLACEMENT

Replace the batteries when the display fades

or the meter cannot be switched on.

Remove the battery

cover on the back of

the meter. Insert 2 new

1.5V batteries, while

paying attention to their

polarity.

Batteries should only be replaced in a safe

area using the battery type specified in this

instruction manual.

CALIBRATION

• For best results, calibrate frequently.

• Dip the tip of the electrode (bottom 4 cm/

1½") in pH 7.01 buffer solution at room tem-

perature. Allow the reading to stabilize.

• Use a small screwdriver to adjust the pH7

trimmer until the display reads "pH 7.01".

• Rinse the electrode with water and dip it in

pH 4.01 (or pH 10.01) buffer solution. Allow

the reading to stabilize.

• With a small screwdriver adjust the pH4/10

trimmer until the display reads "pH 4.01" (or

"pH 10.01").

• Calibration is now complete.

ALWAYS CALIBRATE USING FRESH BUFF-

ER SOLUTIONS.

1 2

HI 98103 1
Checker 2

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