LaMotte 2020wi Portable Turbidity Meters - Manual (Page 50)

TROUBLESHOOTING GUIDE
 TROUBLESHOOTING
PROBLEM REASON SOLUTION
“Blank?” Sample is reading
lower than the blank.
With samples of very
low concentration
reblank or record as
zero. On samples of
higher concentration
reblank and read again.
Flashing Low battery. Readings
are reliable.
Charge battery or use
USB wall/computer
charger.
“Low Battery” Battery voltage is very
low. Readings are not
reliable.
Charge battery or use
USB wall/computer
charger.
“Shut Down Low
Batt” Shut Down
Battery is too low to
operate the unit.
Charge battery or use
USB wall/computer
charger.
“Over range” Sample is outside of
acceptable range.
Dilute sample and test
again.
“Error1” High readings
with 90° and 180°
detectors.
Dilute sample by at
least 50% and retest.
Lost in meter menus Reset to factory
default settings.
Follow Procedure on
page 9 or page 26.
Unusually large
negative or
positive readings
when performing
calibration
Incorrect standards
used to calibrate
meter.
Use fresh 0.0 standard
in clean tube. Reset
meter to factory default
settings. Recalibrate
meter.
 STRAY LIGHT
The accuracy of readings on the 2020we/wi should not be affected by
stray light. Make sure that the sample compartment lid is always fully
closed when taking readings. The backlight will interfere with turbidity
readings. The meter will temporarily disable the backlight while turbidity
measurements are being taken.
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