UNI-T UT677A Operating Manual Download Page 2

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CONTENT

CONTENT ........................................................................................................................................................ - 1 -

Safety rules and precautions ...................................................................................................................... - 2 -

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Introduction ............................................................................................................................................... - 2 -

III.

Range and accuracy ................................................................................................................................. - 3 -

3.1 Resistance measurement accuracy ................................................................................................... - 3 -

3.2 Voltage measurement accuracy ......................................................................................................... - 3 -

3.3 Temperature measurement accuracy ................................................................................................. - 3 -

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Technical Specification .............................................................................................................................. - 3 -

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Structure ..................................................................................................................................................... - 5 -

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Interface display ........................................................................................................................................ - 5 -

VII

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Measuring principle .................................................................................................................................. - 6 -

7.1 Principle of AC 4-terminal test method ............................................................................................... - 6 -

7.2 Principle of voltage measurement ...................................................................................................... - 6 -

7.3 Principle of temperature measurement .............................................................................................. - 6 -

VIII. Operation Method ..................................................................................................................................... - 7 -

8.1

Power on/off

and automatic shutdown ..........................................................................................

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8.2 Test interface operation....................................................................................................................... - 7 -

8.3 Setting menu interface operation ........................................................................................................ - 7 -

8.4 Measurement procedure .................................................................................................................. - 9 -

8.5 Data storage........................................................................................................................................ - 9 -

8.6 Data access and deletion ................................................................................................................... - 9 -

8.7 Communication with PC ................................................................................................................. - 10 -

8.8 Communicate with smartphone or tablet .......................................................................................... - 10 -

IX. Maintenance and service .......................................................................................................................... - 10 -

9.1 Battery ................................................................................................................................................ -11 -

9.2 Repair, inspection and cleaning ...................................................................................................... -11 -

9.3 Common problem .............................................................................................................................. -12 -

X. Packing List ................................................................................................................................................ - 12 -

Appendix......................................................................................................................................................... - 12 -

Appendix 1 Influence of Eddy Current .................................................................................................... - 12 -

Appendix 2 Extending the test lead and the influence of induced voltage ............................................. - 13 -