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242-03V Datasheet(PDF) 8 Page - Tyco Electronics |
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242-03V Datasheet(HTML) 8 Page - Tyco Electronics |
8 / 12 page 84 Glossary Glossary of Terms MI Moving iron, also called ‘iron vane’ in the North American market for measuring AC amps and volts. MC Moving coil for measuring DC amps and volts. Taut band suspension A meter movement held under tension, usually on a ligament. movement Ligament The taut band. Pivot and jewell (P&J) A movement which rotates on a spindle, and pivots within an oil filled jewel. This type of movement typically offers excellent vibration resistance characteristics. Short-scale Angle of deflection for a movement is usually 90 degrees but ANSI is 100 degrees in some products. Long-scale Angle of deflection for a movement is usually 240 degrees but is frequently referred to as 270 degree. FSD Full scale deflection. ES End scale. Input Electrical value from which the measurement is derived to achieve the full scale deflection of the movement. Linear A term used to state that the input is constant, allowing for an even scaling. Non linear The opposite of linear, giving a scale shape which will cramp at some point on the dial. Usually inaccurate below 20% of the full-scale value. Logarithmic scaling A log scale usually derived from a non linear DC output. Scale The graphical representation of the value being measured. Dual arc More than one set of figures on a dial plate. Dial plate/scale plate Surface on which the dial is drawn. Calibration chart A chart matching input values to scale mark, mainly used for complicated scales. Enclosure rating Usually expressed in the form of IP rating or as NEMA in America. This states the product, resistance to the ingress of moisture and dust. DIN European standard meter shape. It is based on multiplies of 24mm, i.e. 48, 72, 96, 144 mm. ANSI American National Instrument Standard. JIS Japanese Instrument Standard. BS89 Old British Standard usually refers to rectangular meter or “Fiesta” style products. Switchboard meter General term for long-scale instruments. Panel meter General name for short-scale instruments. Analogue indicator Generic term for instruments usually refers to a low accuracy meter. An indicator only. |
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