Unipulse F371, Руководство по эксплуатации

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18.ERROR MESSAGES
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18. ERROR MESSAGES
ADC+OVER or ADC-OVER
This message indicates that the inputted electric signal exceeds the input voltage range of
the element (ADC) which converts the inputted electric signal to a digital value whereby
the signal cannot be converted to a correct digital value.
ADC+OVER and ADC-OVER indicate that the inputted electric signal exceeds the input
range in the positive direction and negative direction, respectively.
This message may also be displayed when an excessive load is applied to the sensor or
the input terminals are opened due to a break in the cable.
+OVER or -OVER
This message indicates that the value to be displayed except the decimal point and sign
exceeds five digits. The message and a value of as much as five digits appear alternately.
+OVER and -OVER indicate that the value to be displayed exceeds five digits in the
positive direction and negative direction, respectively.
This message is displayed in such a case wherein a load larger than expected is applied
or calibration is performed below the measuring range. Check calibration and the
measuring object.
Zero calibration error
This message indicates that calibration cannot be performed because the inputted electric
signal exceeds the input voltage range.
Check the cables for breaks or miswiring.
Span calibration error
The span calibration error occurs under the following conditions.
1) An actual load set value of zero is inputted.
2) An electric signal in the negative direction is inputted.
3) An electric signal of 0.05mV/V or less in the positive direction is inputted.
In the case of 1), check the set value, and perform calibration again.
In the case of 2) or 3), check that the actual load is properly applied and check the cables
for miswiring. Where the condition in 3) applies with too light a load, the load needs to
be increased.
Although the F371 will not break down immediately even if the above messages are
displayed, ADC+OVER or ADC-OVER indicates that an excessive voltage may be
applied to the input circuit of the F371. It is therefore required to remove the cause
immediately.
(Although the input is provided with a protection circuit, a long-time excessive voltage
or an instantaneous but extremely high voltage may break the F371.)