Hanna Instruments HI 96704C Hydrazine ISM Instruction Manual page 8

KEYPAD DESCRIPTION
• ON/OFF: to turn the meter on and off.
• ZERO/CFM: to zero the meter prior to measurement, to confirm edited values or to confirm
factory calibration restore.
• READ/ /TIMER: this is a multi-functional key. In measurement mode , press to make a
measurement, or press and hold for three seconds to start a pre-programmed countdown prior
to measurement. In GLP mode press to view the next screen.
• CAL CHECK: this is a bi-functional key. Just press to perform the validation of the meter, or
press and hold for three seconds to enter calibration mode .
• GLP/ : this is a bi-functional key. Just press to enter GLP mode . In calibration mode press
to edit the date and time.
OPERATING MODES
• Measurement mode: default operation mode, enables both validation and measurement.
• Calibration mode: may be entered by keeping CAL CHECK pressed
"CAL" tag appears), it enables calibration of the instrument.
• GLP mode may be entered by pressing GLP/ ("GLP" appears), it enables consulting of
user calibration date or restore factory calibration.
DISPLAY ELEMENTS DESCRIPTION
1) The measuring scheme (lamp, cuvette, detector), appears during different phases of zero or
reading measurement
2) Error messages and warnings
3) The battery icon shows the charging level of the battery
4) The hourglass appears when an internal checking is in progress
5) Status messages
6) The chronometer appears when the reaction timer is running
7) The month, day and date icons appear when a date is displayed
8) Four digit main display
9) Measuring units
10) Four digit secondary display
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