Hanna Instruments HI 96738 - Manual (Page 11)

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• Press READ/ /TIMER to enter in the
factory calibration restore screen. The
instrument asks for confirmation of user
calibration delete.
• Press ZERO/CFM to restore the factory
calibration or press GLP/ again to
abort factory calibration restore.
• The instrument briefly notifies “done”
when restores factory calibration and
returns to
measurement mode.
BATTERY MANAGEMENT
To save battery, the instrument shuts down after 10 minutes of non-use in measurement mode
and after 1 hour of non-use in calibration mode.
If a valid measurement was displayed before
auto shut off, the value is displayed when
the instrument is switched on. The blinking
“ZERO” means that a new zero has to be
performed.
One fresh battery lasts for around 750 measurements, depending on the light level.
The remaining battery capacity is evaluated at the instrument startup and after each measurement.
The instrument displays a battery indicator with three levels as follows:
• 3 lines for 100 % capacity
• 2 lines for 66 % capacity
• 1 line for 33 % capacity
• Empty battery icon blinking if the capacity is under 10 %.
If the battery is empty and accurate measurements can’t be taken anymore, the instrument
shows “dead batt
dead batt dead batt dead batt dead batt ” and turns off.
To restart the instrument, the battery must be replaced with a fresh one.
In the GLP mode, the last user calibration date can be consulted and the factory calibration can
be restored.
To display the calibration date:
• Press GLP/ to enter
GLP mode. The
calibration month and day will appear on
the main display and the year on the
secondary display.
LAST CALIBRATION DATE
• If no calibration was performed, the
factory calibration message, “F.CAL” will
appear on the main display and the
instrument returns to
measurement mode
after three seconds.
FACTORY CALIBRATION RESTORE
It is possible to delete the calibration and
restore factory calibration.
• Press GLP/ to enter
GLP mode.
G L P
• The instrument will return automatically
to the measurement mode by displaying
dashes on the LCD.