Simpson 460 4 Series - Section I; Introduction; General

SECTION I
INTRODUCTION
1.1 GENERAL
1.1.1 The Simpson 460 Series 4 Digital Multimeter (hereafter
referred to as the 460-4 or the Instrument) is a versatile 31⁄2
digit instrument, suitable for use in general electronic mainte-
nance, production, and laboratory. It features 0.1 percent DCV
accuracy, integrated circuit electronics, solid-state LED display,
and pushbutton switch selection for ranges and functions. Addi-
tional features are automatic polarity, analog indication, separate
“low” and “high” power resistance ranges, and excellent tempera-
ture and over-ranging characteristics.
1.1.2 The 460-4 is available in two versions: The standard
(460A) instrument designed to operate from a 120 or 240 volts
AC (50-400 Hz) power source (check rear panel designation),
and a 460D, which is an optional version designed for either AC
line operation or battery operation using rechargeable nickel-
cadmium cells. The battery can operate the Instrument for eight
hours continuously. Recharging is automatic when the Instrument
is in the OFF position and with the line cord connected to an
AC power source. Hereafter, all information and data applies
B
to both instruments. Em
1.1.3 The 460 (Figure 1-1) measures DC and AC voltage, DC
and AC current and resistance as specified in Table 1-1. The up-
down integration technique is used for the analog-to-digital (A/D)
conversion because of its inherently excellent stability, accuracy,
and noise immunity. The use of a Simpson custom MOS-LSI inte-
grated circuit achieves high reliability, low power dissipation, and
a compact design.
1-1