ZKTeco UHF10F Pro Reader User Manual page 23

UHF10 Pro Reader
Check whether there is any interference of the adjacent reader and power
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station magnetic field near the reader.
Check whether the reader is installed correctly and whether the tag is
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operated correctly.
Replace the tag or reader.
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What can be done if the reader doesn't read the card?
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Try the following possibilities:
When the reader is connected to DEMO, you need to click Disconnect so
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that it could read the card again.
Connect the Demo to check whether the manual card reading is normal.
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If the manual card reading does not respond, there is a problem with the
reader. If the manual card reading fails after the factory reset, replace the
reader.
Determine whether the tag is our product, replace the tag test.
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User Manual