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10. ERROR MESSAGES
Error Code
Err
LO Top display
HI Top display
LO Top display
CAL segment ON
HI Top display
CAL segment ON
t LO Top display
CAL segment ON
t HI Top display
CAL segment ON
Air
ELt
nLt
ERROR MESSAGES 15
Description
General failure. Cycle
power to instrument. If
instrument still has error,
contact Milwaukee.
Sample is reading lower
than the 0 % standard
used for meter calibration.
Sample exceeds maximum
measurement range.
Wrong calibration used
to zero instrument. Use
deionized or distilled
water. Press Zero.
Wrong calibration used
to zero instrument. Use
deionized or distilled
water. Press Zero.
Temperature exceeds ATC
low limit (10 °C) during
calibration.
Temperature exceeds ATC
high limit (40 °C) during
calibration.
Prism surface insufficiently
covered.
Too much external light
for measurement. Cover
sample well with hand.
LED light is not detected.
Contact Milwaukee.
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