Hanna Instruments HI 95717C Instruction Manual

Contents

8KEYPAD 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 for3 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 theCAL 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 DESCRIPTION1) 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.13MEASUREMENT PROCEDURE• Turn the meter on by pressing ON/OFF.• When the LCD displays “717”, 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 ensurethat the notch on the cap is positioned securelyinto 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 readyfor measurement.• Remove the cuvet.• Add 10 drops of HI 93717A-0 Phosphate HRReagent A to the cuvet.Turn the meter on by pressing ON/OFF and follow instruction manual to perform either theMEASUREMENT, VALIDATION or CALIBRATION PROCEDURE.MEASUREMENT PROCEDURE

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