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Hanna Instruments HI8424 User Manual

Page 6

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6

INITIAL PREPARATION
• Remove the electrode protective cap before taking any measurements. If the

electrode has been left dry, soak the tip in

HI 70300 storage solution for a few

hours or overnight to reactivate it.

• Connect the pH electrode to the BNC connector on the top of the instrument.
• Connect the temperature probe to the RCA connector. The temperature probe

can be used independently to take temperature measurements, or in
conjunction with the pH electrode to utilize the ATC capability of the meter.

• Turn the meter ON by pressing the ON/OFF key. The display shows all the

used segments for a few seconds (or as long as the button is held), followed
by the percentage indication of the remaining battery life, and then enters
normal measurement mode.

pH MEASUREMENTS
• To take a pH measurement simply submerge the

electrode tip (at least 4 cm/1½") and the tem-
perature probe into the sample to be tested.

• Select the pH mode by pressing the RANGE key until

the display changes to pH.

• Stir gently and wait for the stability symbol (hourglass) to turn off. The display will

show the pH value automatically compensated for temperature.

Notes:
• In order to take accurate pH measurements, make sure that the instrument

has been calibrated before use (see page 9).

• If measurements are taken in different samples successively, it is recom-

mended to rinse the electrode thoroughly to avoid cross-contamination. After
cleaning, it is recommended to rinse the electrode with some of the sample to
be measured.

O P E R A T I O N A L G U I D E

O P E R A T I O N A L G U I D E

O P E R A T I O N A L G U I D E

O P E R A T I O N A L G U I D E

O P E R A T I O N A L G U I D E

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ORP ELECTRODES

HI 3131B / HI 3111S
Glass body, refillable, combination platinum

ORP electrode.

Use: titration.

HI 3230B / HI 3210S
Plastic body, gel-filled, combination platinum

ORP electrode.

Use: general purpose.

110 mm

4.3"

12 mm

0.5"

HI 1413

150 mm

5.9"

12 mm

0.5"

"S" VERSION

HI 3131

120 mm

4.7"

12 mm

0.5"

HI 3230

"S" VERSION

120 mm

4.7"

12 mm

0.5"

9.5mm DIA

0.37"

FC 220

110 mm

4.3"

12 mm

0.5"

FC 911

FC 220B
Glass body, triple ceramic, single junction, refillable, combination

pH electrode.

Use: food processing.

FC 911B
PVDF body, double junction, refillable with built-in amplifier, combination

pH

electrode. Use: very high humidity.

HI 1413B
Glass body, single junction, flat tip, Viscolene, non-refillable combination

pH

electrode. Use: surface measurement.