ANALYSIS PROCEDURES
SELECTING THE EPA MODE
The 2020 turbidity meter has two operating modes, the standard operating mode
and the EPA mode. The meter can only be switched from one mode to the other
while turning the 2020 on, from the OFF state. The 2020 will remain in which
ever mode it was last used, even if the meter has been turned OFF.
To switch from one mode to the other mode:
The standard operating mode displays the measured turbidity to the full
resolution of the meter. The EPA mode displays the measured turbidity rounded
to the reporting requirements of the EPA and Standard Methods compliance
monitoring programs. This greatly simplifies the reporting requirements by
eliminating the need for the user to manually round off the results according to
EPA specifications. The EPA requires these reporting requirements because it
recognizes the inherent accuracy of turbidity measurements within the specified
ranges.
Note: The calibration of the meter is independent of the operating mode.
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