User Guide

12
SOURCES OF INTERFERENCE
• Presence of floating debris and coarse sedi-
ments which settle out rapidly will give false
readings.
• The infrared light source used for HI 93703
turbidity meter, according to ISO 7027 Inter-
national Standard, can effectively minimize
errors due to colored dissolved substances.
This effect, named "true color", is a common
interference for most commercially available
instruments operating in the range of visible
light.
• Air bubbles and the effect of vibrations that
disturb the surface of the sample will give
false results.
• Dirty glassware could also affect readings
along with scratched or edged vials.