appropriate type of AC Adapter designed for the
2020e and 2020i meters. LaMotte offers the AC
adapter as an optional accessory, code number
1754.
If there is any visible damage to the battery
connector, contact LaMotte Technical Services
for a Return Authorization Number and to make
arrangements to have your meter repaired. Any
un-authorized alterations to the meter will void the
warranty.
Calibration
See pages 32 and 33 for calibration instructions.
The 2020e and 2020i are capable of one point
calibrations. For greatest accuracy, blank the
meter first, using an appropriate 0.00NTU blank
standard. The blank reading does not count as
a calibration point. It is a reference standard for
improved low level detection and calibration. After
blanking the meter, select one standard solution
to calibrate the meter to. This can be a 1.0, 10,
100 or other formazin solution. Remember, the
meter is only capable of a one point calibration.
Calibrate to 1.0NTU if samples are expected to be
1.0NTU or less. Calibrate to 10.0NTU if samples
are expected to be greater than 1.0NTU.
Err 1 Message
Low Battery. See “Power Problems” above.
Err 2 Message
An attempt was made to calibrate the meter
outside of the allowable range. The 2020 meters
will not allow the user to recalibrate when the initial
reading of the standard solution deviates greater
than 50% of the standard concentration. A reading
of 0.49NTU is too low for a 1.0NTU standard and
calibration up to 1.0NTU will not be possible. This
may occur if the standard solutions are out of
specification or if there was a problem blanking the
meter prior to calibration.
Check to make sure that the standard solution
is appropriate for use with the 2020e or 2020i.
LaMotte Company makes the standard solutions
specifically for the 2020e and different standards
that are specific for the 2020i. Turbidity standard
solutions can not be interchanged. Confirm by
matching the code numbers on the bottles to the
2020 manual. Formazin standards may be used, if
prepared accurately and used while fresh.
If the standards are within their shelf life, try
resetting the meter to factory calibration. See
“Negative Results” above, or page 22 of the 2020
instruction manual for instructions on how to reset
your meter to factory calibration.
Err 3 Message
An attempt was made to calibrate the meter with
a zero sample. Only use the blank 0.00NTU
standard to set a blank reading, then calibrate to
LaMotte standard solutions.
Err 4 Message
Processing Error. See “Unstable Readings” above.
Err 5 Message
No blank reading. The meter has never been
blanked. Must blank meter using 0.00NTU blank
standard solution.
Err 6 Message
The meter must be re-blanked and the sample re-
scanned.
Err 7 Message
Call LaMotte Technical Service at 1-800-344-3100.
Low Battery
