69
Hardness Mg
• Remove the blank (# 1) and insert
the sample (# 2) into the instrument,
making sure that the notch on the cap
is positioned securely into the groove.
• Press READ DIRECT. “SIP” will blink during measurement.
• The instrument directly displays concentration in mg/L of magne-
sium hardness, as CaCO
3
, on the Liquid Crystal Display.
• To convert the result to mg/L of magnesium (Mg), multiply by a
factor of 0.243.
Note
:
The test will detect any magnesium contamination in the
beakers, measuring syringes or sample cells. To test cleanliness,
repeat the test multiple times until you obtain consistent results.
SAMPLE DILUTION
This meter is designed to determine hardness typically found in water
purification systems. In order to measure samples with high hardness,
follow dilution procedure explained on page 66 (Ca Hardness).
The conversion factors to convert readings in mg/L to French degrees
(FD), German degrees (DD) and English degrees (ED) of hardness are
as follows:
1 mg/L = 0.1 FD = 0.0556 DD = 0.07 ED
INTERFERENCES
Interference may be caused by excessive amounts of heavy metals.
# 2
