Hanna Instruments HI 95706 - Manual (Page 8)

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KEYPAD DESCRIPTION
• ON/OFF: to turn the meter on and off.
• ZERO: to zero the meter prior to measurement.
• READ/TIMER: this is a bi-functional key, just press for making a measurement, or hold the
key for 3 seconds to start a pre-programmed countdown prior to 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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MEASUREMENT PROCEDURE
• Turn the meter on by pressing ON/OFF.
• When the LCD displays “706”, it is ready.
• Fill the cuvet with 10 mL of unreacted sample,
up to the mark, and replace the cap.
• Place the cuvet into the holder and ensure that
the notch on the cap is positioned securely into
the groove.
• Press ZERO and “SIP” will blink on the display.
• After a few seconds the display will show
“ -0.0- ”. The meter is now zeroed and ready for
measurement.
• Remove the cuvet.
• Add 10 drops of HI 93706A-0 Phosphorus
Reagent A to the cuvet.
• Add the content of one packet of HI 93706B-0
Phosphorus Reagent B to the cuvet. Replace
the cap and shake gently until dissolution is
complete.
Turn the meter on by pressing ON/OFF and follow instruction manual to perform either the
MEASUREMENT, VALIDATION or CALIBRATION PROCEDURE.
MEASUREMENT PROCEDURE