MIL-DTL-16034B
6.6.8 Flush-mounting meter. In this specification, a flush-mounting meter is a meter designed so that, when
mounted, the major portion of the meter will extend behind the mounting panel.
6.6.9 Free indication. Meters are considered as indicating freely if the pointer of the meter under test moves
simultaneously with the pointer of the standard meter with which it is being compared, when the electrical energy
supplied to both meters is gradually increased from zero to an amount sufficient to produce end-scale deflection of the
meter under test.
6.6.10 Frequency influence. The frequency influence (in other than frequency meters) is defined as the
percentage change in indication which is caused solely by a change of ±10 percent from the rated frequency.
6.6.11 Full-scale value. The full-scale value is equal to the largest value of the actuating electrical quantity which
can be indicated on the scale; or, for meters having the zero between the ends of the scale, the full-scale values is the
arithmetic sum of the values of the actuating electrical quantity corresponding to the two ends of the scale.
6.6.12 Magnetic shielding. Magnetic shielding is defined as limiting the effect of an external magnetic field of a
designated strength to the value specified (see 3.1). Protection against magnetic fields may be inherent in the
construction of the meter, or it may be obtained by the use of a physical magnetic shield.
6.6.13 Mechanism. The mechanism is the arrangement of the parts for producing and controlling the motion of
the indicating means. It includes all the essential parts necessary to produce the results, but does not include the case,
cover, dial, or any parts, such as series resistors or shunts, whose function is to adapt the meter to the quantity to be
measured.
6.6.14 Meter, electrical-indicating. In this specification, an electrical-indicating meter is defined as a measuring
device which measures the value of the quantity under observation. The term "meter" is used to include not only the
meter proper but, in addition, any necessary apparatus, such as shunts, shunt leads, resistors, reactors, condensers, or
instrument transformers.
6.6.14.1 Meter proper. The meter proper is the mechanism and the scale, built into the case, including all devices,
such as resistors, shunts, and so forth, which are built into the case, or nonremovably attached to it.
6.6.14.2 Example. A 500-ampere direct-current ammeter consists of the meter proper, which may be thought of
as essentially a millivoltmeter, together with a 500-ampere shunt and a pair of shunt leads.
6.6.15 Meter-rating. The meter-rating is a designation assigned by the manufacturer to indicate the operating
limitations of the meter. The end-scale marking of a meter does not necessarily correspond to its rating.
6.6.16 Moving element. The moving element of a meter comprises those parts which move as a direct result of a
variation in the electrical quantity which the meter is measuring.
6.6.17 Normal operating position. The normal operating position for meters covered by this specification is as
follows:
a.
Switchboard meters - mounted on a vertical panel.
b.
Portable meters - placed on a horizontal support.
6.6.18 Overshoot. Overshoot is the ratio of the overtravel of pointer beyond its steady deflection to the change in
steady deflection when the meter is suddenly energized with a new constant value of the measured quantity. The
overtravel and deflection are determined in angular measure and the overshoot is usually expressed as a percentage.
6.6.19 Position influence (balance). The position influence is the maximum displacement of the pointer which is
caused solely by a 60 degree inclination of the meter from normal operating position in the direction which produces
the most unfavorable conditions as to position.
6.6.20 Power consumption. Power consumption is the electrical power required to produce end-scale deflection
of the meter. Power consumption may be expressed in terms of units other than units of power.
6.6.21 Radio-frequency meter. In this specification, a meter designed to operate at 50 kilocycles per second or
above is considered a radio-frequency meter.
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