User Guide

15
• Insert the cuvet with
the HI93703-10
AMCO-AEPA-1 stan-
dard @10 FTU* into
the measurement cell
and press the CAL key
again.
• After approximately 50
seconds the LCD will
display "----".
Now the instrument is
calibrated and ready
for use.
HOW TO ENSURE ACCURATE CALIBRATION
The instructions listed below should be care-
fully followed during testing and during calibra-
tion:
• All glassware that comes into contact with
standards should be maintained clean. Wash
with HI93703-50 cleaning solution and rinse
with HI 93703-0 or turbidity free water.
• Rinse the vial twice with 5 ml of the liquid to
be tested. This removes the effect of any
previous liquid and any dust or foreign matter
that may be present inside. Gently pour the
liquid down the side of the vial to reduce air
bubbles (no mixing is required when HI 93703-
0 and HI 93703-10 AMCO-AEPA-1 standards
are used).
• Before inserting the vial
into the instrument,
wipe it with HI93703-
70 soft, lint-free tissue.
Handle vials so that no
fingerprints can get on
the areas where light
passes (approximately
2 cm/1 inch from the
bottom of the vial ).
* 1 FTU = 1 NTU