S&C DISTRIBUTION COMPANY
MODEL 360 GROUND FINDER 1/17/15
PAGE 2
to make both polarity tests. When switching polarities is necessary, a simple push-button
feature is supplied to enable quick, temporary reversal of polarities. Also, to guard against
detecting “ghost” grounds, meter sensitivity is limited to 1000 ohms per volt, matching the
Simpson TS-111(r).
In the “TEST” mode, alarms (Red LED, beeper) activate when the maintainer encounters a
ground. For safety, and to allow testing under traffic, output current is limited to less than
1.0mA in the “TEST” mode.
Because the output of our Ground Finder is allowed to rise to a maximum of 10.0mA in the
“CONFIRM” mode, upon ground indication, the maintainer must have track and time (TOP)
clearance to switch the tester to the “CONFIRM” mode before verifying that his ground is
reportable. Once he has determined that it is safe to switch the Model 360, a quick test in the
“CONFIRM” mode tells him the value of the ground up to 10.0mA (meter full-scale). Because
we supply the test voltage in the Confirm (current) mode as well as the Test (voltage) mode,
“dry” wire tests that fail to detect grounds will not occur. Also, by providing the voltage for the
current test, it is not necessary to activate circuits that are inactive at the time of the test.
Built “railroad” tough to withstand the usual working environment, the 360 tester is designed
with circuitry that gives protection against damage caused by momentary contact with
110VAC, and, connection of the tester to a high-current ground. The unit is furnished with a
lithium, 9VDC battery, which expands its operating temperature range to -40 deg F.
Battery storage compartment is an easy-access, drawer-like device that is located on the right
side of the tester. Unit comes complete with leads and a black, zippered carrying pouch with
space for lead storage, a pocket for carrying an extra battery and the Calibration Check Device
and a loop to thread the strap handle of the 355 Signalman's Meter through to enable a dual-
meter configuration. Quick-Start instruction booklet and a complete instruction manual are also
provided. A Dual-Meter Case accessory (PN: 360-20) is available that allows the maintainer
to carry his Ground Finder (for ground tests) and an alternative Fluke VOM or similar meter (for
voltage tests) in the same case. A Dual Meter Kit, paring the 360-4 Ground Finder with our
355 Signalman's Meter can be purchased (see last page for ordering information).
SPECIFICATIONS
a. “TEST” Mode Output: 22.5VDC @ less than 1.0mA
b. “TEST” Mode Current Required For Ground Detection: 0.10mA
c. “CONFIRM” Mode Output: 22.5VDC. Will not exceed 10.0mA
d. Isolation: 1000 Ohms per volt (through meter)
Designed to absorb momentary connection to 110VAC
Plastic case, insulated probe provide operator & short protection
