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Columbia type dp tong test ammeter
Columbia Type DP Tong Test Ammeter
The Tong Test Ammeter Reads the True RMS (heating) Value, Regardless of Wave Shape. It Contains no Batteries, Rectifiers, Switches or Electrical Windings to Overheat or Burn Out. Currents in Lines up to 2300V can be Measured if the Cables are Properly Insulated. DC Accuracy is 5% of Full Scale, AC accuracy (25-100Hz) is 2%, Except 5% on Ranges Above 500A. Add 1% for 100-400Hz
* No Transformers or Shunts Needed
