Hanna-instruments HI 95721 Instrukcja Użytkownika Pobierz pdf (Strona 5)

Range 0.00 to 5.00 mg/L

Resolution 0.01 mg/L

Precision

±0.01 mg/L @ 1.50 mg/L

Typical EMC Deviation ±0.01 mg/L

Light Source Tungsten lamp with narrow band interference filter @ 525 nm

Light Detector Silicon Photocell

Method Adaptation of the USEPA method 315B and Standard Method

3500-Fe B. The reaction between iron and the phenanthroline

reagent causes an orange tint in the sample.

Environment 0 to 50°C (32 to 122°F); max 95% RH non-condensing

Battery Type 1 x 9 volt

Auto-Shut off

After 10' of non-use in measurement mode;

after 1 hour of non-use in calibration mode.

Dimensions 180 x 83 x 46 mm (7.1 x 3.3 x 1.8")

Weight 290 g (10 oz.).

REQUIRED REAGENTS

Code Description Quantity/test

HI 93721-0 Iron HR Reagent 1 packet

Precision is how closely repeated measurements

agree with each other. Precision is usually

expressed as standard deviation (SD).

Accuracy is defined as the nearness of a test

result to the true value.

Although good precision suggests good accuracy,

precise results can be inaccurate. The figure

explains these definitions.

In a laboratory using a standard solution of 1.50

mg/L Iron and a representative lot of reagent, an

operator obtained with a single instrument a

standard deviation of

0.01 mg/L.

SPECIFICATIONS

PRECISION AND ACCURACY

CALIBRATION PROCEDURE

• Turn the meter on by pressing ON/OFF.

• When the LCD displays “721”, it is ready.

• Enter the calibration mode by holding CAL CHECK

for three seconds.

• The date of the last calibration appears (e.g.:

month “01”, day “08”). “F.CAL” means that the

factory calibration is selected.

Note: at this point it is possible to reset the

instrument to restore FACTORY CALIBRATION, see

instructions page 18.

• Place the CAL CHECK™ Standard Cuvet A into

the holder and ensure that the notch on the cap is

positioned securely into the groove.

• Press ZERO and “SIP” will blink on the display.

• After a few seconds the display will show “-0.0-”.

The meter is now zeroed and ready for calibration.

• Remove the cuvet.

• Place the CAL CHECK™ Standard HI 95721-11

Cuvet B into the holder and ensure that the notch

on the cap is positioned securely into the groove.

Note: it is possible to interrupt calibration procedure at any time by pressing ON/OFF.

Warning: do not validate or calibrate the instrument with standard solutions other than the Hanna CAL

CHECK™ Standards, otherwise erroneous results will be obtained.

CALIBRATION PROCEDURE

1 2 3 4 5 6 7 8 9 10

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