User Manual

22 23
SPECIFICATIONS
Range 0 to 500 mg/L (as CaCO
3
)
Resolution 5 mg/L
Accuracy ±5 mg/L ±10 % of reading at 25 °C
Typical EMC ±5 mg/L
Deviation
Light Source Tungsten lamp with narrow band interference filter @ 575 nm
Method Colorimetric Method. The reaction causes a distinctive range of colors from yellow to
green to greenish blue to develop.
REQUIRED REAGENTS
Code Description Quantity/test
HI 93755-0 Alkalinity Indicator Reagent 1 mL
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 the Zero key. The display will show “-0.0-” when the meter is zeroed and ready for
measurement.
ALKALINITY
Alkalinity
• 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 s or t to access the second level functions.
• Press the Chem Frm key to convert the result in mg/L of Al
2
O
3
.
• Press s or t to return 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
# 1
# 1
# 2
10 mL