Reg. U.S. "DUCTER" Pat. Off.

LOW RESISTANCE OHMMETER
CAT. 718

DIRECTIONS

Place instrument on a firm and fairly
level base. Connect 1-volt battery or
special 1-volt rectifier to positive and
negative terminals. Pointer will float
towards zero until test connections are
made. To use Duplex Hand Spikes,
connect black leads to current terminals
CC and red leads to potential terminals
PP. Apply spikes to resistance under
test so that potential spikes P and P make
contact in path of current flowing
between the current spikes. For other
connections, see INSTRUCTION
MANUAL.

When making tests, start with range
switch at "Inner Scale." If reading is
less than one-tenth full scale, move
switch to "Outer Scale" and proper
multiplier. Multiply scale reading by
range switch setting. Return range
switch to OFF position. In event of
excessive voltage in potential circuit,
automatic cut-out will open. Return
range switch to OFF position, remove
cause and push RESET CUT-OUT button.

Caution.—Do not test equipment while energized. Do not test highly inductive circuits without taking proper precautions. READ INSTRUCTION MANUAL 24J25.

JAMES G. BIDDLE CO.

1316 Arch Street, Philadelphia 7, Pa.

Made in England

A.D.391

W.P.250.1.50