THEORY OF OPERATION
The True RMS Ampstik+ has been developed specifi cally for mea sure ment of AC cur rent
in environments of up to 500 kV for the electrical utility industry. The True RMS feature
allows accurate mea sure ment of current even when the nominal waveform is distorted
or when harmonics are present. This may be the case with Y connected transformer
neutral leads and dis tri bu tion to many in dus tri al customers using SCR con trol lers and
other switching de vic es. This in stru ment can be used re mote ly with any hot stick and
universal chuck adapter. It has no moving parts and does not require clamping onto the
wire. The Polycarbonate housing is water resistant and will withstand high physical impact.
Page 5
Safety Information
Read all safety and instruction statements before using the product. Failing to
follow the safety guidelines can cause severe injury or death.
Ampstik+ units are designed for use on live, overhead lines with 0 to 500KV.
All procedures ap pro pri ate for the line voltage are to be taken, including
proper work techniques, equipment, and Personal Protection Equipment.
The Ampstik+ should be used only by certifi ed personnel who have been
trained for live-line, high voltage work by their organization.
The hot stick length must be the correct for line voltage per minimum
approach distances stated in published OSHA regulations and/or provided by
the utility.
The cover plate, chuck, and entire Ampstik+ are to be considered at the same
potential. Putting the cover plate, chuck, or other parts of the Ampstik+
within the air gap of adjacent phases or ground could cause a phase to phase
or phase to ground fault.
The hot stick should be considered the sole isolation device.
Do not force the arms of the Ampstik+.
Do not alter the product in any manner.
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