Hanna Instruments HI 96715 - Manual (Page 5)

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ERRORS AND WARNINGS
KEYPAD DESCRIPTION
• ON/OFF: to turn the meter on and off.
• ZERO/CFM: this is a bi-functional key. Just press to zero the meter prior to measurement,
or to confirm edited values. In 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 for three seconds ( the
“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
The instrument shows clear messages when erroneous condition appears. Messages are also displayed
when the obtained values are outside expected range. The beeper is playing a beep on errors.
a) on zero reading
Light High: There is too much light to perform a measurement.
Please check the preparation of the zero cuvette.
Light Low: There is not enough light to perform a measurement.
Please check the preparation of the zero cuvette.
No Light: The instrument cannot adjust the light level. Please
check that the sample does not contain any debris.
Inverted cuvettes: The sample and the zero cuvette are inverted.
Zero: A zero reading was not taken. Follow the instructions of
the measurement procedure for zeroing the meter.
b) on sample reading