Hanna Instruments c 99 Manuel D’Utilisation

48

Chromium VI LR

SPECIFICATIONS

Range

0 to 300 µg/L

Resolution

1 µg/L

Accuracy

±1 µg/L ±4% of reading

Typical EMC

±1 µg/L

Deviation

Light Source

Tungsten lamp with narrow band interference

filter @ 525 nm

Method

Adaptation of the ASTM Manual of Water and
Environmental Technology, D1687-92

,

Diphenylcarbohydrazide method. The reaction be-

tween chromium VI and the reagent causes a

purple tint in the sample.

REQUIRED REAGENTS

Code

Description

Quantity

HI 93749-0

Powder  reagent

1 packet

REAGENT SETS

HI 93749-01 Reagents for 100 tests
HI 93749-03 Reagents for 300 tests
For other accessories see page 141.

MEASUREMENT PROCEDURE

• Select the program number corresponding to Chromium VI LR on

the secondary LCD by pressing PROGRAM W and V.

• Fill the cuvet with 10 mL of unreacted sample

(up to the mark) 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 blink on the display.

• Wait for a few seconds and the display will

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