Hanna Instruments hi 98401 ユーザーズマニュアル

SPECIFICATIONS

Scale

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0.050 to 0.500 ppm

0.50 to 5.00 ppm

5.0 to 50.0 ppm

50 to 500 ppm

0.50 to 1.90 g/L

Temp. 0.0 to 50.0 °C

Resolution

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0.001 ppm

0.01 ppm

0.1 ppm

1 ppm

0.01 g/L

Temp. 0.1 °C

Accuracy

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±5% of reading or ±0.02 ppm (whichever

greater) with less than ±3°C difference from

calibration temperature; or

±10% of reading or ±0.02 ppm (whichever

greater) with temp. difference greater than ±3°C

Temp. ±0.5 °C

EMC

-----

± 2% f.s.

Deviation Temp. ±0.5°C

Calibration

Automatic 1 or 2 points; first point at 100 ppm

second point at 10.0 or 1000 ppm

Temperature

Automatic 5 to 35 °C (41 to 95°F)

Compensation

with temperature probe attached

Electrode

FC 301B, fluoride with 1m (3') cable and BNC

connector

HI 5313, reference with 1m (3') cable

Temperature

HI 7662 with 1 m (3') cable

Probe

Power supply

4 x 1.5V AA alcaline batteries

120 hours of continuous use

Environment

0 to 50°C (32 to 122°F); 100% RH

Dimensions

196 x 80 x 60 mm (7.7x3.1x2.4")

Weight

450 g (15.9 oz.)

OPERATIONAL GUIDE

INITIAL PREPARATION:
The meter is supplied with 4 pieces of 1.5V AA-type alkaline batteries.
Remove the battery cover on the back of the meter and insert the
batteries while paying attention to their polarity.
Attach the fluoride electrode (#3 on

page 4), the reference electrode (#2)

and the temperature probe (#1) to their
respective connectors on top of the meter.

Press the ON/OFF key to turn the meter on.

Note: The temperature probe can also be used on its own to measure

the temperature independently.

Note: If the temperature probe is not con-

nected, the lower display will indicate

25.0°C with the “°C” symbol blinking.

MEASUREMENT OF FLUORIDE ION CONCENTRATION

Note: Please ensure the meter is calibrated prior to proceeding any

further. In order to obtain accurate results, calibrate the meter

at a temperature no more than ±3°C away from the sample

to be measured subsequently.

Note: If the fluoride electrode is new, or it has not been used for a

few days, it must be soaked in a solution of HI 70702 (10 ppm

of F

-----

) for at least 3 hours prior to measurement.

• Pour about 10-20 mL of the sample in a clean beaker and add the

same quantity of HI 7023 (TISAB) solution to the beaker. Mix the
solution for a few minutes.

• Rinse the electrodes with deionized water and dry them attentively

with a non-abrasive cloth.

• Immerse the fluoride and the reference electrode as well as the

temperature probe to a depth of at least 1 cm
(½”) in the prepared sample. Make sure that

the electrodes are not touching the bottom of

the beaker. Position the temperature probe close

to the tip of the other electrodes.

Temperature

probe

F Electrod Ref.