how to use an ammeter clamp

Clamp On Ammeter - Electrical Power Testing - Grainger Industrial.

FLUKE Clamp On Ammeter, 2500A - Clamp On Ammeters - 6FXH4.

EXTECH Digital Clamp On Ammeter, 400A - Clamp On Ammeters.
AC/DC Clamp on ammeter - Trawler Forum.

DC Current Clamp Meter | Corrosion Monitoring | Cathodic Protection.
Question about digital clamp ammeter reading technique/philosophy.
The problem is different types of clamp ammeter that I have used, gives different readings. I am confused as to how the ammeter measures the .
Amprobe LH41A Low Current Clamp-On Ammeter: Amazon.com: Industrial. The unit automatically turns off after 8 minutes of non-use to conserve battery life.

How To Use a Clamp Ammeter to Test a Pool Pump Motor.

in the nfpa 70-e2004edition, 110.9 relates to equipment use, but says nothing about clamp on meters, or split jaw ammeters, hope this helps .