18
INTERFERENCES
Bromine (positive error)
Oxidized Manganese and Chromium (positive error)
Chlorine dioxide (positive error)
Ozone (positive error)
Iodine (positive error)
Alkalinity above 250 mg/L CaCO
3
or acidity above 150 mg/L CaCO
3
will not reliably develop the
full amount of color or it may rapidly fade. To resolve this, neutralize the sample with diluted
HCl or NaOH.
In case of water with hardness greater than 500 mg/L CaCO
3
, shake the sample for approximately
2 minutes after adding the powder reagent.
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.
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, cuvette
and detector icons will appear on the
display, depending on the measurement
phase.
• Place the
CAL CHECK
TM
Standard
HI 96734-11
Cuvette A into the cuvette
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.
Summary of Contents for HI 96734C
Page 2: ...2 sale ponpe com www ponpe com...
Page 26: ...26 sale ponpe com www ponpe com...
