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I Safety Instructions
Thank you for purchasing the Clamp-on Ground Resistance of our company
and for the full use of the product, please:
Read the user manual carefully.
observe the operation notes listed in the manual.
Under no circumstances shall fail to pay attention to the safety in using the
clamp meter.
Pay attention to the stipulate measurement scope and operation environment.
The instrument shall apply to ground resistance testing instead of the current
of power frequency power wire, or it will affect the clamp's magnetic property
and the accuracy of ground resistance testing finally .
Pay attention to the labeled words on the surface board and backboard.
Before start it, pull the trigger once or twice to confirm the jaw of clamp can
close or open freely .
When starting it, don't pull the trigger and clamp any wires.
Clamp the objects being tested only after displaying the sign OL after
started the instrument.
UT276A/278A OPERATING MANUALUT276A/278A OPERATING MANUAL
7 Alarm Function Setting
8 Alarm Critical Value Inquiry
9 Data Wipe
10 Data Uploading to Computer
VIII Measurement Principles
1 Resistance Measurement Principle
2 Current Measurement Principle
IX Ground Resistance Measurement Method
1 Multi-point Ground System
2 Limited Point Ground System
3 Single Point Ground System
X On-site Application
1 Application of Power System
2 Application of Telecommunication System
3 Application of the building lightning protection ground system
4 Application of the gas station ground system
XI Notes about Ground Resistance Measurement
Appendix: loop Resistance Analysis
6 Data Inquiry
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