9. Error messages
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This instrument alarms erroneous or incomplete operation by error messages.
The followings are kinds of error messages.
Zero setting error
●Water is not dripped on the prism surface and Zero setting is made in a
state of the prism surface being exposed to the air.
●Zero setting is made with a sample.
Sampling error
●No sample exists on the prism surface or measurement is made in an
incomplete condition.
Range over error
●A liquid of high concentration exceeding the measuring range is measured.
Battery error
●The battery is low. Replace the battery with new one.
●Immediately before the battery is used up, the instrument may, perform
erroneous operation, without displaying the error message "Lo". In such a
case, replace the battery with new one.
Temperature measurement range "Low Range Over Error"
●The temperature detected is lower than the measurement temperature
range (approx. 4℃ or below).
Temperature measurement range "High Range Over Error"
●The temperature detected is higher than the measurement temperature
range (approx. 41℃ or above).
External light interference
●Too much light is entering the prism, and the instrument cannot measure
accurately.
20.4
L L L
20.4
H H H
LLL
1 2.3
HHH
1 2.3
L o
20.4
A A A
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n n n
