User Guide

85
• Remove the cuvet and add the con-
tent of one packet of HI 93721
reagent. Replace the cap and shake
until dissolution is complete.
• Reinsert the cuvet into the instrument.
• Press TIMER and the display will show the countdown prior to the
measurement or, alternatively, wait for 3 minutes and press READ
DIRECT. In both cases "SIP" will blink during measurement.
• The instrument directly displays concentration in mg/L of iron on
the Liquid Crystal Display.
INTERFERENCES
Interference may be caused by:
Molybdate Molybdenum above 50 ppm
Calcium above 10000 ppm (as CaCO
3
)
Magnesium above 100000 ppm (as CaCO
3
)
Chloride above 185000 ppm.
Iron HR