19
INTERFERENCES
Bromine (positive error) Oxidized Manganese and Chromium (positive error)
Chlorine dioxide (positive error) Ozone (positive error)
Iodine (positive error)
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. For accurate validation, please
perform test at room temperature: 18 to 25°C (64.5 to 77.0°F)
Note: The validation is performed only for the selected parameter. For full validation of the
instrument, the following procedure must be performed for each parameter.
•
Turn the meter on by pressing ON/OFF.
• Press ZERO/CFM and the lamp, cuvet
and detector icons will appear on the
display, depending on the measurement
phase.
• Place the CAL CHECK
TM
Standard
HI 95771-11 Cuvet A into the cuvet
holder and ensure that the notch on the
cap is positioned securely into the groove.
• When the beeper sounds briefly and the
LCD displays dashes, the meter is ready.
• After a few seconds, the display will
show “-0.0-”. The meter is now zeroed
and ready for validation.