Hanna Instruments HI 95717 - Manual (Page 9)

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This prompt appears for 1 second each time the instrument is turned
on.
This indicates that the meter is in a ready state and zeroing can be
performed.
Sampling in Progress. This flashing prompt appears each time the
meter is performing a measurement.
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.
GUIDE TO DISPLAY CODES
12
• Proper use of the dropper:
(a) to get good reproducible results, tap the dropper on the table for several times and wipe the
outside of the dropper tip with a cloth.
(b) always keep the dropper bottle in a vertical position while dosing the reagent.
• Proper use of the powder reagent packet:
(a) use scissors to open the powder packet;
(b) push the edges of the packet to form a spout;
(c) pour out the content of the packet.
• Shaking the cuvet can generate bubbles in the sample, causing higher readings. To obtain accurate
measurements, remove such bubbles by swirling or by gently tapping the vial.
• 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.
• 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.
(a) (b)
(a) (b) (c)