Hanna Instruments HI 96728 - Manual (Page 15)

15
VALIDATION PROCEDURE
Use the validation procedure to ensure that the instrument is properly calibrated.
Warning:
Do not validate the instrument with any standard solutions other than the HANNA CAL
CHECK TM Standards, otherwise erroneous results will be obtained.
• Turn the meter on by pressing ON/OFF.
• When the beeper sounds briefly and the
LCD displays dashes, the meter is ready.
The blinking “ZERO” indicates that the
instrument needs to be zeroed first.
• Place the CAL CHECK TM Standard
HI 96728-11 Cuvette A into the cuvette
holder and ensure that the notch on the
cap is positioned securely into the groove.
• Press ZERO/CFM and the lamp, cuvette
and detector icons will appear on the
display, depending on the measurement
phase.
• After a few seconds, the display will
show “-0.0-”. The meter is now zeroed
and ready for validation.
• Remove the cuvette.
• Place the CAL CHECK TM Standard
HI 96728-11 Cuvette B into the cuvette
holder and ensure that the notch on the
cap is positioned securely into the groove.