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Hanna Instruments HI8424 User Manual

Page 7

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7

TEMPERATURE COMPENSATION
The meter is designed to compensate for temperature, as the response of the pH
electrode is directly affected by temperature.
Automatic Temperature Compensation (ATC shown on LCD)
To use the ATC feature, submerge the temperature probe into the sample as
close as possible to the electrode and wait for a few minutes. The displayed pH
reading is compensated for the temperature of the sample.
Manual Temperature Compensation (MTC shown on LCD)
If the temperature probe is not connected, it is possible to enter the tempera-
ture value manually.
• Record the sample temperature by using a

ChecktempC (if you are

measuring temperature in °C, or

ChecktempF for °F readings) or another

accurate thermometer.

• Press RANGE to select the temperature mode. The "°C" (or "°F") symbol will

blink to indicate that the temperature probe is not connected.

• Use the UP and DOWN keys to display and set

the sample temperature (e.g. 25 °C).

• Press RANGE to select the pH measurement mode and immerse the electrode

into the sample. The displayed pH reading will be temperature compensated
at the set value (in this case at 25 °C).

ORP MEASUREMENTS
Oxidation Reduction Potential (ORP) measurements provide a quantification of
the oxidizing or reducing power of the sample tested.
• Connect the ORP electrode (optional) to the BNC connector.
• To enter the "mV" mode turn the instrument ON and press the RANGE key

until the display changes to mV.

• Submerge the ORP electrode tip (at least 4 cm / 1½") into the sample to be

tested and allow time for the reading to stabilize (hourglass symbol turns off).

• Measurements within the ±699.9 mV range

are displayed with 0.1 mV resolution, while
outside this range the resolution is 1 mV.

22

HI 1332B / HI 1312S
Plastic body, double junction, refillable, combination

pH electrode.

Use: general purpose.

HI 2031B / HI 2020S
Glass body, semimicro, conic, refillable, combination

pH electrode.

Use: semisolid products.

75 mm

2.95"

6 mm

0.25"

"S" VERSION

HI 2031

120 mm

4.7"

12 mm

0.5"

"S" VERSION

HI 1332

FC 100B
PVDF body, double junction, refillable, combination

pH electrode.

Use: general purpose for food industry.

FC 200B / FC 200S
PVDF body, single junction, conic, Viscolene, non-refillable, combination

pH

electrode. Use: meat & cheese.

FC 210B
Glass body, double junction, conic, Viscolene, non-refillable combination

pH

electrode. Use: milk, yogurt.

120 mm

4.7"

12 mm

0.5"

FC 100

75 mm

2.95"

6 mm

0.25"

FC 200

120 mm

4.7"

12 mm

0.5"

FC 210