Hanna Instruments HI8424 - Manual (Page 6)

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.