22
23
• Add the content of one packet of HI 93712C-0 Bleaching
powder to one of the two cuvettes. Replace the cap and
shake vigorously until completely dissolved. This is the blank.
• Place the blank into the holder and close the lid.
• Press TIMER and the display will show the countdown prior to
zeroing the blank. Alternatively wait for 15 minutes and then press
ZERO. The display will show "-0.0-" when the meter is zeroed and
ready for measurement.
• Remove the blank and insert the other cuvette into the instrument.
• Press the READ key and the meter will perform the reading. The
instrument displays the results in mg/L of aluminum.
• Press the
or
to access the second level of functions.
• Press the
Chem Frm
functional key to convert the result in mg/L of Al
2
O
3
.
• Press the
or
to go back to the measurement screen.
INTERFERENCES
Interference may be caused by:
Iron above 20 mg/L
Alkalinity above 1000 mg/L
Phosphate above 50 mg/L
Fluoride must be absent
Aluminum
SPECIFICATIONS
Range
0 to 500 mg/L (as CaCO
3
)
Resolution
5 mg/L
Precision
±10 @ 100 mg/L
Typical EMC
±5 mg/L
Deviation
Light Source
Tungsten lamp with narrow band interference filter @ 575 nm
Method
Colorimetric Method
. At different alkalinity levels a distinctive range of colors from yellow
to green and greenish blue will develop.
REQUIRED REAGENTS
Code
Description
Quantity/test
HI 93755-0
Alkalinity Indicator Reagent
1 packet
REAGENT SETS
HI 93755-01
Reagents for 100 tests
HI 93755-03
Reagents for 300 tests
For other accessories see page 128.
MEASUREMENT PROCEDURE
• Select the
Alkalinity method using the procedure described in the
Method Selection section (see page 12).
• Fill the cuvette with 10 mL of unreacted sample, up to the
mark, and replace the cap.
• Place the cuvette into the holder and close the lid
• Press ZERO key. The display will show “-0.0-” when the meter is
zeroed and ready for measurement.
ALKALINITY
10 mL
Alkalinity
# 1
# 1
# 2
