9
This indicates that the meter is in a zeroed state and measurement
can be performed.
Light over range: the cuvet is not inserted correctly and an excess
ambient light is reaching the detector. If the cover is properly
installed, then contact your dealer or the nearest Hanna Customer
Service Center.
The blinking "BAT" indicates that the battery voltage is getting low
and the battery needs to be replaced.
This indicates that the battery is dead and must be replaced. Once
this indication is displayed, the meter will lock up. Change the
battery and restart.
“Configuration”: this indicates that the meter has lost its
configuration. Contact your dealer or the nearest Hanna Customer
Service Center.
CALIBRATION MODE MESSAGES
The date of the last calibration appears on the LCD each time the
calibration mode
is entered. If calibration is performed for the first
time, “F.CAL” appears.
This indicates that the factory calibration is selected.
The flashing digits indicate that:
1) the month can be set
2) the day can be set
“Storage”: this prompt appears for 1 second at the end of the
calibration procedure
, to indicate that the calibration data has
been stored.
“Error”: the concentration of the calibration solution used is not
correct. Repeat the
calibration procedure
with the right standard
solution, and verify it is not expired. If the calibration procedure fails
again, contact your dealer or the nearest Hanna Customer Service
Center.
12
MEASUREMENT PROCEDURE
• Turn the meter on by pressing ON/OFF.
• When the LCD displays “729”, it is ready.
• Fill one cuvet with 10 mL of deionized water.
For most accurate results, use of a class A
laboratory pipette is strongly recommended.
Alternatively, fill the cuvet up to the 10 mL
mark.
• Add 2 mL of HI 93729-0 Fluoride Reagent to
the cuvet by use of the 2000
µ
L automatic
pipette.
For a correct use of the automatic pipette,
please follow the related Instruction Sheet.
Turn the meter on by pressing ON/OFF and follow instruction manual to perform either the
MEASUREMENT, VALIDATION or CALIBRATION PROCEDURE.
2
m
L
• Do not let the reacted sample stand too long after reagent is added, or accuracy will be lost.
• It is possible to take multiple readings in a row, but it is recommended to take a new zero
reading for each sample and to use the same cuvet for zeroing and measurement
use the same cuvet for zeroing and measurement
use the same cuvet for zeroing and measurement
use the same cuvet for zeroing and measurement
use the same cuvet for zeroing and measurement.
• After the reading it is important to discard immediately the sample, otherwise the glass
might become permanently stained.
• 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).
• In order to maximize accuracy, prior to a measurement follow the
validation procedure
to
be sure that the instrument is properly calibrated. If necessary, calibrate the instrument.
MEASUREMENT PROCEDURE
