65
Hardness Ca
• Add 1 drop of HI 93720C EGTA solution to one cuvet
(# 1), replace the cap and invert the cuvet several
times to mix. This is the blank.
• Place the blank (# 1) into the holder
and ensure that the notch on the cap
is positioned securely into the groove.
• 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 and insert the
second cuvet (# 2) into the instru-
ment.
• Press READ DIRECT. "SIP" will blink during measurement.
• The instrument directly displays concentration in mg/L of calcium
hardness, as CaCO
3
, on the Liquid Crystal Display.
• To convert the reading to mg/L of calcium (Ca), multiply by a
factor of 0.4.
# 1
# 2
# 1