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IM CW140-E
2-6
2.4 Overrange and Other Marks Shown
during Measurement
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Overrange Indications during Measurement
: Conditions for current overrange indication
This mark appears if the sampled value exceeds 300% of the rated
current range or if the rms value of the measured current exceeds
110% of the rated range. If a fixed range is used, step up the range.
: Conditions for voltage overrange indication
This mark appears if the sampled value exceeds 300% of the rated
voltage range or if the rms value of the measured voltage exceeds
110% of the rated range. If a fixed range is used, step up the range.
TIP
• The current overrange mark appears if an input signal to one of the terminals CH1 to CH4
satisfies the conditions noted above.
• The voltage overrange mark appears if an input signal to one of the terminals V1 to V3 satisfies
the conditions noted above.
Indication of Overrange Marks When Auto-ranging Is Used
The CW140 steps up or down the range, as discussed in Section 7.3,
"Ranges and Number of Digits." Then, the CW140 shows the or
mark if the conditions noted above become true under the maximum range.
Indication of OR Symbol
The CW140 shows the OR symbol, instead of a usual four-digit value, if the
result of measurement (calculation) satisfies the conditions noted above.
(If a fixed range is used, step up the range.)
Indication of OR Symbol When Auto-ranging Is Used
The CW140 steps up or down the range, as discussed in Section 7.3,
"Ranges and Number of Digits." Then, the CW140 shows the OR
symbol if the conditions noted above become true under the maximum
range.
WARNING
The CW140 shows an overrange mark under the maximum range only if the input level exceeds
the maximum allowable input level. Do not apply any input level higher than the maximum allow-
able input level.