Hanna Instruments HI 83740 User Manual

Page 9

GUIDE TO DISPLAY CODES

After Timer is pressed, a blinking hourglass icon appears and the

display shows a 10 minutes coundown. Also the Zero tag might

blink if no zero measurement has been made before. At the end, an

acoustic signal alerts the user that the countdown has 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.

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

Indicates that the meter is performing a zero measurement. The

light intensity is automatically re-adjusted (auto-calibration features)

if necessary.

• Diluting procedure of the wine sample in case the “L

Lo” (Low Light) message appears: use the pipette to fill

the glass vials with 5 mL of wine sample (both vials),

then fill the vials up to the 15 mL mark with HI 83742-

1 Wine Solvent-1. This is the diluted wine sample. The

final reading must be multiplied by 3 to compensate for

dilution.

• In order to avoid reagent leaking and to obtain more

accurate measurements, it is recommended to close

the cuvet first with the supplied HDPE plastic stopper

and then with the black cap.

• Whenever the cuvet is placed into the measurement

cell, it must be dry outside, and completely free of

fingerprints, oil or dirt. Wipe it thoroughly with

HI 731318 (tissue for wiping cuvets, see chapter

ACCESSORIES) or a lint-free cloth prior to insertion.

• Read the cuvets immediately after extraction.

In case of unstable readings or for more accurate results,

let the reacted cuvets stand for at least 4 hours, allowing

complete separation of the formed emulsion.

• Before taking a measurement, verify that no air bubbles

or water drops are attached to the walls of the glass

cuvet.

5 mL

15 mL