Hanna-instruments HI 931100 Uživatelský manuál stáhnout pdf (Strana 11)

2120

TEMPERATURE CALIBRATION

(for Technical Personnel only)

INITIAL PREPARATION

Prepare a 0°C/32°F bath with ice and water and

another one at 50°C/122°F using hot water at a

known temperature. Place insulation material around

the containers to minimize temperature changes.

Use a

Checktemp

or another accurate thermometer

with a resolution of 0.1° as reference.

Note: A blinking "°C" indicates

that the temperature probe

is not connected.

PROCEDURE

• Connect the HI 7662 temperature probe to the

RCA socket on the top of the instrument.

• Turn the instrument off.

• To enter the temperature calibration mode, press

the CAL and ON/OFF keys simultaneously.

• Immerse the temperature probe

into the 0°C/32°F bath together

with the reference thermom-

eter.

• When the reading stabilizes,

press the CAL key. The

"0.0°C", "CAL" and "BUF"

symbols will be displayed. The

" " symbol will blink for a

few seconds.

°C

NaCl

0 °C

(32 °F)

°C

50 °C

(122 °F)

°C

0°C

(32°F)

TEMPERATURE

The best working temperature is around 20-25°C

(68-77°F).

For greatest accuracy, it is recommended to cali-

brate the meter with standard solution at a tempera-

ture as close as possible to the temperature of the

sample (±1°C/±2°F).

Na CONCENTRATION WITH HI 931100

It is always possible to determine the Na concentra-

tion by using the formula:

= X

NaCl

• (23 / 58.4)

where

= concentration of Na

and

NaCl

= concentration of NaCl

BUF

CAL

°C

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 17

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