10
ERROR MESSAGES
The meter has lost its configuration. Contact your dealer or the
nearest Hanna Customer Service Center.
“Light high”: there is too much light to perform a measurement.
Please check the preparation of the zero cuvet.
“No Light”: the lamp is not working because of a malfunction.
Contact your dealer or the nearest Hanna Customer Service Center.
a) on zero reading:
a) on zero reading:
a) on zero reading:
a) on zero reading:
a) on zero reading:
A flashing value of the maximum concentration indicates an over
range condition. The concentration of the sample is beyond the
programmed range: dilute the sample and measure again.
The sample absorbs less light than the zero reference. Check the
procedure.
“Inverted”: the sample and the zero cuvet are inverted.
b) on sample reading:
b) on sample reading:
b) on sample reading:
b) on sample reading:
b) on sample reading:
Indicates that the batteries are dead and must be replaced. After
this message appears, the instrument is switched off. Change the
batteries and restart the meter.
“Light low”: there is not enough light to perform a measurement.
Please check the preparation of the zero cuvet.
11
The instructions listed below should be carefully followed during testing to ensure best accuracy.
• For dosing the wine sample and the reagent, we
recommend to use the supplied Hanna automatic
pipettes
HI 731340
(200 µL) and
HI 731341
(1000 µL). For a correct use of the Hanna
automatic pipette, please follow the related
Instruction Sheet.
GENERAL TIPS FOR AN ACCURATE MEASUREMENT
Hanna
automatic pipette
USING VIALS
• Never insert hot vials into the instrument, or the
cuvet holder may be damaged.
• In order to avoid reagent leaking and to obtain
most accurate results, it is recommended to close
the vial tightly with the supplied cap after addition
of reagents or sample.
• Whenever the vial 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
or a lint-free cloth prior to
insertion.
DIGESTION
• Use of the optional
HI 740217
safety shield
is
recommended. For correct use of the reactor follow
the Reactor Instruction Manual. At the end of the
digestion period, the vials are still hot: allow the
vials to cool to room temperature in the optional
HI 740216 test tube cooling rack
.
• All the reaction times reported in this manual are
referred to 20°C (68°F). As a general rule of
thumb, they should be doubled at 10°C (50°F)
and halved at 30°C (86°F).