014370-000000-0000001 Scope
1.1 These requirements cover electrical and electrically operated indicating and recording instruments of the analog type that are powered only from the measured parameter and are intended for ordinary use in panel boards and the like.
1.2 These requirements cover direct-acting or indirect-acting instruments and accessories that may contain electronic devices.
1.3 These requirements cover instruments indicating quantities of electrical analogs including all of the following:
a) Ammeters.
b) Voltmeters.
c) Wattmeters.
d) Varmeters (reactive volt-ampere meters).
e) Frequency meters.
f) Power-factor meters.
g) Synchroscopes.
1.4 These requirements cover instruments constructed for special purposes such as, ultrasensitive d-c microammeters, high-resistance voltmeters, thermo-milliammeters, thermal voltmeters of the vacuum-couple type, and instruments with special and unusual ranges.
1.5 These requirements cover analog instruments that may be categorized according to use or principle of operation as follows:
a) Use:
1) Panel Type, including edgewise.
2) Switchboard type, including edgewise.
b) Principle of operation:
1) Electrodynamics.
2) Permanent-magnet moving coil.
3) Moving iron.
4) Thermocouple.
5) Rectifier.
1.6 These requirements also cover auxiliary equipment and accessories designed to be used with measuring instruments as indicated in 1 – 5.
1.7 These requirements do not cover:
a) Indicating instruments provided with arrangements for curve drawing, contact making, and the like that derive the power for the functioning of these arrangements from an external source other than the measured parameter.
b) Instruments that use active devices such as transistors, electron tubes, and the like for amplifying the electrical quantity measured, that require a power source other than the quantity measured for operation. An example of this is a battery-powered ohmmeter. This equipment is covered by the safety requirements in the Standard for Electrical Equipment for Measurement, Control, and Laboratory Use; Part 1: General Requirements, UL 61010-1.
1.8 Instruments covered by these requirements are intended for use indoors or in sheltered (from the elements) locations, as follows:
a) Temperature – 5 – 40 °C or 41 – 104 °F; instruments may occasionally be used for temporary or short periods at minus 10 – plus 5 °C or 14 – 41 °F.
b) Altitude – Up to 2200 meters (7218 feet).
c) Relative Humidity – Up to 80 %.
1.9 These requirements do not cover certain other properties of the instruments such as effectiveness, accuracy, or reliability.
1.10 Throughout this Standard the term "instrument" applies to analog indicating and recording instruments and their accessories as described in 1 – 6.