Model LC-4 is the first hand-held digital
meter to include a number of special features which facilitate corrosion and cathodic
protection testing on underground structures. It is designed for field testing under
almost any environmental conditions. Sealed Mil Spec. switches, sealed windows, a gasketed
case and a printed circuit board with baked-on moisture and fungus resistant coating on
both sides make this possible.
The large (0.5") display characters are easy to read
under both high and low lighting conditions and function over a wide temperature range
with very little drain on the battery.
The LC-4 is recommended for potential surveys, side drain
measurements, surface potential surveys, IR drop measurements, checking both the AC and DC
circuits of rectifiers, checking for stray or hazardous AC potentials, and checking
galvanic anodes. DC current measurements require the use of an optional plug-in shunt
(0-20 Amp).
The selectable input resistance feature
permits detection of high resistance in the external circuit and elimination of resulting
errors in virtually all cases.
The push-to-hold-reading button freezes
the display at any desired time, which makes the meter usable in many areas having varying
stray currents. It is also useful when conducting instant-off and coordinated tests.
