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1.3 Internal Batteries
There are two batteries in the ohmmeter circuits. One is a NEDA 13F size D cell
that furnishes 1.5-volts for the R X 1 and R X 100 ranges. A NEDA 1604 battery
furnishes 9-volts for the R X 10,000 range. The 1.5-volt D cell is held in place with
two spring clips which also serve as battery contacts. The polarity symbols for the
D cell are marked near the battery contacts. The 9-volt battery is held in place
with a spring clip, but contact is made with a separate connector that is polarized.
Always observe correct polarity when replacing the 1.5-volt D cell.
1.4 Printed Circuit
Most of the component parts are mounted on a printed circuit board which simpli-
fies assembly and maintenance, thus, extending the useful life of the Instrument.
1.5 Phenolic Case
The phenolic case is designed with heavy reinforced walls for maximum durability
and provides excellent protection for the circuit components. Access to the bat-
teries and fuses are obtained by unscrewing a single captivated screw at the
bottom of the case and sliding out the compartment cover. Rubber plug bumpers
on the bottom of the case reduce sliding should the 260 be accidentally pulled by
the test leads when the Instrument is on a workbench.
1.6 Adjust-A-Vue Case
A carrying handle is attached to the Instrument case. The handle may be used to
support the Instrument in a convenient sloping position for easy viewing. The
case can also be placed in either a vertical or horizontal position. The horizontal
position is preferable for greater accuracy since the Instrument is calibrated in this
position.
1.7 Test Leads
Each Instrument is furnished with one pair (Catalog Number 00043) of probe type
test leads (one red and one black, each 48 inches long) for all applications of the
Instrument. These test leads have elbow prods on one end, to connect the leads
to the recessed jacks on the Instrument front panel. The probe tips at the oppo-
site end have threaded shoulders to accept the screw-on insulated alligator clips
(furnished with the test leads) or the 5000 volt test probe(s) to extend the Instru-
ment AC or DC voltage range. The test leads and the insulated alligator clips are
rated for the voltage and current ranges available on the 260. Maximum ratings
are 1000V AC or DC or 10 DC amperes.
• THESE RATINGS FOR THE TEST LEADS MUST NOT BE EXCEEDED IN
ANY APPLICATION.
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