User Guide

• Replace the cap and invert
several times to mix.
• Place the cuvet 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 cuvet.
• Using the 1 mL syringe,
injectinject
injectinject
inject exactly 1 mL of the
HI 93752B-0 Ca Oxalate
reagent. Replace the cap
and invert the cuvet 10
times to mix.
• Press TIMER or wait for 5 minutes, then invert again the
cuvet 10 times. Reinsert the cuvet into the instrument.
• Wait for 10 seconds, press
READ DIRECT and SIP will
blink on the display.
• The instrument directly
displays concentration in
mg/L of Calcium (Ca) on the Display.
Note: To ensure accurate results, perform the tests at room temperature,
between 18°C and 28°C (65°F to 83°F).
INTERFERENCES:
concentration reading
Acidity (as CaCO
3
) above 1000 mg/L lower
Alkalinity (as CaCO
3
) above 1000 mg/L higher
Magnesium (Mg
2+
) above 400 mg/L higher
1 mL
Calcium
30
SPECIFICATIONS
Range 0 to 150 mg/L
Resolution 5 mg/L
Accuracy ±5 mg/L ±3% of reading
Light Source Tungsten lamp with narrow band interference filter
@ 466 nm
Method Adaptation of the Calmagite method.
REQUIRED REAGENTS
Code Description Quantity
HI 93752
AA
AA
A-0 Mg Magnesium Buffer Reagent 1 mL
HI 93752
BB
BB
B-0 Mg Magnesium Indicator Reagent 9 mL
REAGENT SETS
HI 937520-01 Reagents for 50 tests
HI 937520-03 Reagents for 150 tests
For other accessories see page 56.
MEASUREMENT PROCEDURE
Note: for sample preparation follow the IRRIGATION WATER (LR)
procedure at page 19.
• Select the program number 14 “Magnesium” on the secondary
LCD by pressing PROGRAM M and L.
• Using one 1 mL syringe add
exactly 1.00 mL of HI 93752A-0
Mg Buffer reagent to the cuvet
and use the pipette to fill the
cuvet up to the 10 mL mark with
the HI 93752B-0 Mg Indicator
reagent.
• Replace the cap and invert
several times to mix.
• Place the cuvet into the
holder and ensure that the
notch on the cap is positioned
securely into the groove.
1 mL
MAGNESIUM
Magnesium
31