Hanna Instruments HI 83742 User Manual

Page 9

GUIDE TO DISPLAY CODES

After Timer is pressed, a blinking hourglass icon appears and the
display shows a 2 hours coundown. Also the Zero tag might blink
if no zero measurement has been made before. At the end of the
countdown an acoustic signal alerts the user that the timer is
finished.

Indicates that the instrument is in a ready state and waiting for the
next command (Timer or Zero).

These prompts indicate the type of power supply: “Line” (if the
external power supply is used) or the battery level.

This prompt appears for a few seconds each time the instrument is
turned ON.

The instrument is zeroed and a measurement can be made.

Indicates that the meter is making a measurement.

Indicates that the meter is performing a zero measurement. The
light intensity is automatically re-adjusted (auto-calibration features)
if necessary.

Batteries voltage is getting low and the batteries need to be
replaced.

TOTAL PHENOLS, WHITE WINE

SPECIFICATIONS

SPECIFICATIONS
Range

0.000 to 0.750 g/L

Resolution

0.001

Precision

±0.015 @ 0.350 g/L

Light Source

Tungsten lamp with narrow band interference filter @ 610 nm

Method

The reaction between Phenols and the reagents causes a blue tint in the
sample.

REQUIRED REAGENTS

REQUIRED REAGENTS
Code

Description

Quantity/test

HI 83742A-0

Acid Reagent

5 mL

HI 83742B-0

Folin & Ciocalteu’s Reagent

6 drops

HI 83742C-0

Carbonate Buffer

4.5 mL

For reagent set and other accessories see page 26.

SAMPLE PREPARATION

• Use the 5 mL syringe to add exactly 5 mL of

HI 83742A-0 reagent to an empty cuvet.
Note: in order to measure exactly 5 mL of reagent
with the syringe, follow the instructions on page 11.

5 mL

• Use the 200 µL automatic pipette to add exactly 0,2

mL of white wine sample to an empty cuvet.
For a correct use of the automatic pipette please
follow the related Instruction Sheet.