The Phase ID Field Probe
The Field Probe consists of a hotstick tube, a mounted instrument box, and a ground cable. It is designed to be attached to the appropriate length universal hotstick when any primary voltage is being contacted, and not to be used as a hand-held tool unless it is being used with the Secondary Adapter to measure 120V voltages. High voltage resistors inside the hotstick tube reduce primary voltages to a value that can be measured using standard low voltage circuit components.
 The instrument box contains a GPS receiver, a microprocessor, and a liquid crystal display (LED). The Field Probe is operated using a single push button. Bright daylight visible status lights are placed on the end of the instrument box, where they can be easily seen when the Field Probe is attached to the end of a hotstick. The unit will operate continuously for approximately 20 hours (intermittently for weeks) on 3 standard AAA batteries. A coiled insulated ground wire (rated to 90KV) and a ground clip is attached to provide a secure ground reference for phase voltage measurements when required. Bushing probe, OH hook, and secondary adapters allow the Field Probe to be used to acquire phase measurements on primary, secondary, and dead front voltages.
 The Secondary Adapter attaches to the Field Probe and is used to acquire phase measurements on secondary voltages. The adapter contains a standard 3-wire 120V cord and male plug. Pigtails and larger connections for higher secondary voltages are not included.
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