Simpson 260 Series - Page 11

SECTION !
INTRODUCTION
1.1 GENERAL
1.1.1 The Simpson Volt-Ohm-Milliammeters 260 Series 7P and
Series 7PM (hereafter referred to as the 260 or as the Instrument),
are identical instruments electrically and mechanically, except
that the Series 7PM is equipped with a mirrored dial to eliminate
parallax (Figures 1-1 and 1-2). The 260 Series 7P is a rugged, ac-
curate, compact, easy-to-use instrument. The Instrument can be
used to make accurate measurements of AC and DC voltage,
direct current, resistance, decibels, and Output Voltage. The
Output Voltage function is used for measuring the AC compo-
nent of a mixture of AC and DC voltage. This occurs primarily
in amplifier circuits.
1.1.2 New Features іп the 260-7P and 7PM are:
e New connectors between the Instrument and the test leads
which eliminates a shock hazard in the event a connector is
inadvertently pulled out of the Instrument jack.
е A high energy fuse Е, which is now in the BATTERY AND
FUSE COMPARTMENT, and accessible without removing
the Instrument case.
e An OFF/TRANSIT position which has been added to the
function switch to protect the meter movement during transit.
(This position shunts the meter movement and opens the internal
connections to the COMMON and + jacks.)
e A test lead set with molded elbow prods at one end for connec-
tion to the front panel input terminals and test probes at the
other end. The test probes have a non-slip grip surface and a
barrier to maintain the spacing between the user’s fingers and
the probe tip. Threaded shoulders at the probe tip accept
screw-on alligator clips (supplied) or an accessory AC or DC
5000 volt range extending probes.
1-1