Hanna Instruments hi 93741 用户手册

19

HI 93743

Iron LR   & pH

The  HI 93743 meter measures the pH and the Iron (Fe) content in
water and wastewater.

SPECIFICATIONS

Range

Fe 0 to 400 µg/L

pH 5.9 to 8.5

Resolution

Fe 1 µg/L

pH 0.1

Accuracy

Fe ±10 µg/L ±8% of reading

pH ±0.1

Typical EMC

Fe ±1 µg/L

Deviation

pH ±0.1

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 pH, Phenol red method. The reaction be-

tween pH and the reagent causes a red tint in

the sample.

REQUIRED REAGENTS

Code

Unit

Description

Quantity

HI 93746-0

Iron LR

TPTZ  Reagent

2 packets

HI 93710-0

pH

Phenol red

5 drops

34

H

I 9

3

7

0

1

• Fill the cuvet up to the mark with

10 mL of unreacted sample and
replace the cap.

• Place the cuvet into the holder and

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

• Press ZERO and "SIP" will ap-

pear on the display.

• Wait for a few seconds and the display will

show "-0.0-". Now the meter is zeroed and
ready for measurement.

• Remove the cuvet.
Powder reagents procedure
• Add the content of one packet of HI 93701 DPD

reagent. Replace the cap and shake gently.

• Reinsert the cuvet into the instrument.

• Press READ and the display will

show "SIP" during measure-
ment.

• The instrument directly displays concentration in mg/L of free

chlorine on the Liquid Crystal Display.

Liquid reagents procedure
• Add 3 drops of HI 93701A-F DPD1 indicator and 3 drops of

HI 93701B-F DPD1 buffer to another cuvet. Shake gently before
adding 10 mL of unreacted sample. Replace the cap and shake
gently again.

ZERO

Free Chlorine