To alert utility-line workers of overcurrent conditions on such aerialdevices as insulated ladders and truck booms, the Chance Sentinel soundsan alarm ifleakage current reaches pre-set level. The leakage settingadjusts from I to 1,000 icroamperes in resolution increments of 0. 1microamp. The audible warning eliminates the need towatch the actualcurrent level, continuously displayed on the Chance Sentinel's digitalLCD screen. The alarm sounds immediately upon overcurrent and continuesuntil the condition is corrected. To also trigger a truck horn or otherexternal alarm, a jack on instrument panel accepts a standard 'A" two-conductor phone plug. A test terminal on the panel permits a simplecontinuity check of the monitor leads prior to each operation, Beforeeach use, the instrument automatically performs a rapid electronicselftest. Simple operating steps are printed on the inside lid panel. Adetailed instruction sheet also comes with each unit.
