Hanna-instruments HI 95729 Manual de usuario descargar pdf (Pagina 8)

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.

This prompt appears for 1 second each time the instrument is

turned on.

This indicates that the meter is in a ready state and zeroing can

be performed.

Sampling in Progress. This flashing prompt appears each time the

meter is performing a measurement.

GUIDE TO DISPLAY CODES

• Replace the cap to the cuvet, and shake

gently a couple of times.

• Place the cuvet with the reacted deionized

water (blank) into the holder and ensure that

the notch on the cap is positioned securely

into the groove.

• Hold READ/TIMER

for three seconds and the

display will show the countdown or,

alternatively, wait for two minutes.

• Press ZERO and "SIP" will blink on the

display.

Wait for a few seconds and the display will

show "-0.0-". Now the meter is zeroed and

ready for measurement.

• Remove the blank from the instrument.

• Remove the cap from the cuvet and discard

the blank.

• Rinse the cuvet a couple of times with the

unreacted sample and discard it.

Turn upside down the empty cuvet and shake

it to remove excess of liquid.

• Fill the same cuvet with 10 mL of unreacted

sample.

For most accurate results, use of another

clean class A laboratory pipette is strongly

recommended.

Alternatively, fill the cuvet up to the 10 mL

mark.

• Add 2 mL of HI 93729-0 Fluoride Reagent

to the cuvet by use of the 2000 µL automatic

pipette.

For a correct use of the automatic pipette,

please follow the related Instruction Sheet.

1 2 3 4 5 6 7 8 9 10

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Hanna-instruments HI 95729 Manual de usuario Pagina 8

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