Hanna Instruments hi 93741 用户手册

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HI 93741

Total Hardness & Iron LR

The HI 93741 meter measures the Iron (Fe) content and the Magne-
sium (Mg), Calcium (Ca) and Total Hardness in water and wastewater.

SPECIFICATIONS

Range

Fe 0 to 400 µg/L

Mg Hardness 0.00 to 2.00 mg/L

Ca Hardness 0.00 to 2.70 mg/L

Total Hardness 0.00 to 4.70 mg/L

Resolution

Fe 1 µg/L

Hardness 0.01 mg/L

Accuracy

Fe ±10 µg/L ±8% of reading

Hardness ±0.11 mg/L ±5% of reading

Typical EMC

Fe ±1 µg/L

Deviation Hardness ±0.02 mg/L

Light Source

Light Emitting Diode @ 555 nm

Method

For Iron, Adaptation of the TPTZ Method. The

reaction between iron and the reagent causes a

blue tint in the sample.

For Hardness, adaptation of the Standard Meth-

Calmagite/colorimet-

ric method. The reaction between hardness and

reagents causes a maroon tint in the sample.

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• Nothing is added to the third cuvet.

• Place the ZERO1 sample into the holder

and ensure that the notch on the cap
is positioned securely into the groove.

• Press ZERO; "SIP" will appear during measurement, then the

instrument will display "ZER2".

• Remove the ZERO1 sample and insert

the ZERO2 sample into the instru-
ment.

• Press ZERO again; "SIP" will appear during measurement, then

the instrument will display the level of Magnesium hardness in
ppm CaCO

3 

(together with "n").

• Remove the ZERO2 sample and insert

the third cuvet into the instrument.

• Press READ; "SIP" will appear during measurement, then the

instrument will display the concentration of Calcium in ppm CaCO

3

(together with "C").

• Press READ again; "SIP" will appear during measurement and

the instrument will display the total hardness concentration in
ppm CaCO

3 

(together with "t").

ZERO

ZERO

Hardness