Stand-alone tool designed to simplify, expedite and standardize the testing for grounds.  Testing voltage is 22.5VDC in both “Test” and “Confirm” modes, avoiding “masking” below 20VDC and out of the normal signaling voltage ranges.  Regulated power supply maintains 22.5 volt output through the life of the battery.  Unique “touch-and-go” operation greatly accelerates testing.  Also, below 17VDC, it is not necessary to switch polarities to detect both positive and negative grounds, they are detected simultaneously.  Matches established analog meter impedance of 1000 Ohm/Volt, does not see “ghost grounds”.  Highly electrically rugged:  survives “tap” contact with 110/220VAC, cannot  be damaged by exposure to over-current of any value.  Ground detection beeper permits “touch-and-go” testing and triggers at 0.0001mA, addressing “ground-free” requirement of electronic interlocking and       grade crossing warning devices.  Push-button polarity reversal for quick check to determine if ground detected is on the positive or negative side of the battery.  With “Confirm” feature, allows independent testing of “dry” wires.  Operating temperature range:  -40degF to 140 degF.  Ground lead and terminal are green, to signify a connection to ground.  Comes complete with leads, 9V, lithium battery and tool         pouch zippered case with belt loops to permit attaching to 355 Signalman’s Meter web belt handle. Can be ordered as part of a Dual-Meter, or Triple-Meter Kit with the 355 Signalman’s Meter.  See 355 Section of this website.