Hanna-instruments HI 9321 Manual do Utilizador descarregar pdf (Página 24)

ADDITIONAL CALIBRATION

PROCEDURES & INFORMATION

(for technical personnel only)

TEMPERATURE CALIBRATION

Initial Preparation

• Prepare a vessel containing ice and water and another one

containing hot water (at a temperature of at least 50°C). Place

insulation material around the container to minimize tempera-

ture changes.

• Use a ChecktempC or a calibrated ther-

mometer with a resolution of 0.1 °C as a

reference thermometer.

Procedure

• With the instrument off, press both CAL and ON keys simulta-

neously. The "CAL" indicator will be lit and the secondary LCD

section will show 0.0°C.

• Immerse the temperature probe in the

vessel with the ice and water as near to

the ChecktempC as possible.

• Wait for temperature reading to stabilize.

• Use the

↑↑

↑°C or

↓↓

↓°C keys to set the

reading on the secondary LCD to that of

ice and water.

• Press CFM. The secondary LCD will show 50.0°C.

• Immerse the temperature probe in second

vessel.

0 °C

(32 °F)

°C

50 ºC

(122 ºF)

°C

CAL

°C

0 °C

(32 °F)

°C

CAL

°C

50 °C

(122 °F)

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