Hanna Instruments HI 95724 - Manual (Page 8)

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KEYPAD DESCRIPTION
• ON/OFF: to turn the meter on and off.
• ZERO: press to zero the meter prior to measurement.
• READ: press for making a measurement.
• CAL CHECK: this bi-functional key allows to perform validation of the instrument just pressing
the CAL CHECK key, or hold the key for 3 seconds to enter the calibration mode.
OPERATING MODES
• Measurement mode: default operation mode, enables both validation and measurement.
• Calibration mode: may be entered by keeping CAL CHECK pressed for three seconds ( the “CAL”
icon appears), it enables calibration of the instrument.
DISPLAY ELEMENTS DESCRIPTION
1) four digit main display area.
2) CAL: appears when the instrument operates in the
calibration mode.
3) the Month and Day icons appear above the number of month and day when a date is
displayed.
4) the blinking “Battery” icon appears when the battery voltage is getting low.
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FACTORY CALIBRATION RESET
It is possible to restore factory calibration:
DATE INPUT
• Keep READ pressed to scroll to the desired
month number (01-12).
• When the correct month has been set, press
ZERO to confirm.
• Now the display will show the day number
blinking. Keep READ pressed to scroll to the
desired day number (01-31).
Note: it is possible to change from day to month
and vice versa by pressing ZERO.
• When both the day and month have been
selected, hold CAL CHECK for three seconds
to store date and calibration values. The
instrument will show for one second “Stor”,
to confirm that the new calibration data has
been accepted.
• The instrument will return automatically to
the measurement mode by displaying "724"
on the LCD.
• Enter the calibration mode by holding CAL
CHECK for three seconds .
• Hold ZERO for 10 seconds. The display will
show for 2 seconds “F.CAL” and "724"
appears. The factory calibration is
automatically restored and the instrument is
ready for measurement.