75a. Hoyt VU Meters. Industry Standard for Volume Level Measurements Sizes from 1.5" to 4.5" Choice of Styles & Mounting Made in U.S.A.

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Reynard Holt
6 years ago
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VU meters are used to measure sound or noise levels in broadcast monitoring, public address systems and anywhere volume level measurements are to be made.

1 Hoyt VU Meters Industry Standard for Volume Level Measurements Sizes from 1.5" to 4.5" Choice of Styles & Mounting Made in U.S.A. The VU meter is the standard level indicator for audio frequency transmission systems. VU meters are used to measure sound or noise levels in broadcast monitoring, public address systems and anywhere volume level measurements are to be made. The VU also is useful for the measurement of noise level and other audio frequency energy where the established dynamic characteristics of the VU meter give a common result for measurements taken in different laboratories. The VU meter is designed to read zero VU or 100% with volts applied to the instrument and the 3600 ohm series resistance. This represents 4 db above 1 milliwatt in 600 ohms. The combination of a special copper oxide rectifier and an extremely sensitive movement with special magnetics give these meters very high sensitivity. Two scales types are available with white, black or buff background color. A black pointer is standard, red optional. TYPE A SCALE The "A" Scale reads "-20 to +3" in type on the top of the arc, with "0-100" in type on the bottom of the arc. TYPE B SCALE The "B" Scale reads "0-100" in type on the top of the arc, with "-20 to +3" in type on the bottom of the arc. To order: Specify model, mounting, scale type/color, VU Custom legends & logos available on request /3 Size Model Style 1 1 /2" Rectangular, panel or bezel mount 3115 Rectangular, surface or window mount 2 1 /2" 17/3 Round, phenolic 2025 Rectangular, panel or bezel mount 635 Rectangular, phenolic 685 Edgewise 3125 Rectangular, surface or window mount 4025 Rectangular, phenolic & glass 3 1 /2" 2035 Rectangular, panel or bezel mount 2135 Rectangular, low profile phenolic 582 Round, phenolic 597 Rectangular, phenolic 3135 Rectangular, surface or window mount 4035 Rectangular, phenolic & glass 4 1 /2" 2045 Rectangular, panel or bezel mount 2145 Rectangular, low profile phenolic 647 Rectangular, phenolic 3145 Rectangular, surface or window mount 4045 Rectangular, phenolic & glass 75a

initially developed to meet the demanding specifications of the Atomic Energy Commission with respect to seismic qualifications, long-life and high accuracy.

2 International Instruments Edgewise Panel Meters 3 1 /2" and 6" Switchboard Meters Accuracy: ±1.5% (1151/1251) Single (1146/1151) or Dual Indicators (1246/1251) Rugged Construction Flush Stacking EMI Shielded Illumination Available Single/Dual Models 1151/1251 and 1146/1246 These meters were initially developed to meet the demanding specifications of the Atomic Energy Commission with respect to seismic qualifications, long-life and high accuracy. The resulting product line is the most rugged and reliable available. Models 1146 and 1246 are 3 1 /2 inch meters, 1151 and inch models, both series of instruments manufactured of modern black plastic with a design compatibility that makes them perfectly suited for use together on the same panel board. Windows are tough clear Lexan. ORDERING INFORMATION To Order Insert Number Code for Each Letter to Select Catalog Number. Order Example: 1151-V-B-ACA 0-5/ V-B-ACV 0-150/0-600/B-ACA 0-5/0-400 Single A-B-C-D Dual A-B-C-D-C-D-C-D A B C D A Model " Single " Dual /2" Single /2" Dual B Orientation H Horizontal V Vertical C Zero Position Horizontal Vertical L Left T Top C Center C Center R Right B Bottom D Standard Ranges, All Models AC Volts AC Amperes AC Milliamperes 0-10, 15, 25, 50, 150, , 100, , 500 DC Volts DC Amperes DC Microamperes DC Milliamperes 0-5, 10, 15, 0-1, 2, 5, 10, 0-50, 100, 200, 0-1, 2, 3, 4, 5, 25, 30, 50, 15, 25, 50, 300, 400, , 20, 50, 100, 100, 150, 200, 100*, 200* 200, 500, 4-20, 300, *=50mV shunt rated 1151 OPTIONS Factory Scaling Custom Scaling (Specify) Factory Ranging Illumination 1151 & 1251 Only Adjustable Potentiometer Voltmeters Only Zero Center Colored Bands Price Per Color / /1251 Accuracy (% of FS) DC:2 AC:3 DC:1.5 AC:2.5 Repeatability In Accordance with ANSI C39.1 Overload In Accordance with ANSI C39.1 Response Time (sec. max.) Dielectric Strength (VRMS 60 Hz/1 min) 2600 Overshoot (max) 40% 20% Terminals (variations available) Threaded stud (10-32) Threaded stud (1/4-28) Scale length-inches (mm) 2.7(68.6) 4.5(114.3) Zero adjustment Yes Yes Pointer (other colors available) Red Delta Weight (oz) /1246: :25/1251:30 Also available: 1 1 /2", 2 1 /2" & 3 1 /2" Edgewise Meters 57

International Instruments Thin Panel Meters 4" Edgewise Meters Compact Design for High Density Installations Rugged Construction Flush Stacking EMI Shielded Vertical or Horizontal Styles 1140

3 International Instruments Thin Panel Meters 4" Edgewise Meters Compact Design for High Density Installations Rugged Construction Flush Stacking EMI Shielded Vertical or Horizontal Styles 1140 Accuracy: ±2% of full scale Repeatability: In Accordance with ANSI C39.1 Overload: In Accordance with ANSI C39.1 Response Time: 2 sec. max. Dielectric Strength: 500VRMS 60 Hz/1 min Overshoot: 20% max Terminals: Solder terminals (variations available) Scale length: 3.7" Zero adjustment: Optional Pointer: Red standard, other colors on reqest Enclosure: Steel housing with internal magnetic shield Dimensions: 0.515"W 5.094"H 4.52" behind panel Panel Cutout: 0.54" 4.75" ORDERING INFORMATION To Order Insert Number Code for Each Letter to Select Catalog Number. Order Example: 1140-V-B-DCmA 0-5/0-300 A B C D / E A Model " Ultra-Thin Edgewise B Orientation H Horizontal V Vertical C Zero Position Horizontal Vertical L Left T Top C Center C Center R Right B Bottom D Standard Ranges DC Volts DC Amps DC Microamps DC Milliamps 0-5, 10, 15, 0-1, 2, 5, 10, 0-50, 100, 200, 0-1, 2, 3, 4, 5, 25, 30, 50, 15, 25, 50, 300, 400, , 20, 50, 100, 100, 150, 200, 100*, 200* 200, 500, , 500 E Scale No entry: Scale matches meter range Custom: Specify scale and legend *=50mV shunt rated AC Voltmeters and Ammeters also available 57a

Weschler Analog Edgewise and Panel Meters Type 252 edgewise instruments were designed specifically for the nuclear power industry.

These instruments incorporate the same taut-band suspension system that is used in the Weschler switchboard meters.

exceed the requirements for the 2% class specified in ANSI C39.1, and may be calibrated to 1% initial accuracy.

Accuracy 1 1 /2% of full scale deflection, 1% on special order. Waveform Compensation to 15% of third harmonic content.

4 Weschler Analog Edgewise and Panel Meters Type 252 edgewise instruments were designed specifically for the nuclear power industry. Their ruggedness and reliability make them an excellent choice for any control panel. These instruments incorporate the same taut-band suspension system that is used in the Weschler switchboard meters. They are available for direct measurement of standard electrical quantities, or in combination with transducers for measuring any other electrical or mechanical quantity that can be converted into a proportional electrical quantity. MODIFICATIONS AVAILABLE Internal illumination Non-glare window Dual scale or rating Straight fine tubular pointer Offset, center, or suppressed zero Gasketed construction The V252 & H252 Meters exceed the requirements for the 2% class specified in ANSI C39.1, and may be calibrated to 1% initial accuracy. They meet the flammability requirements of IEEE Standard and they have passed the seismic qualification tests under IEEE Standard Accuracy 1 1 /2% of full scale deflection, 1% on special order. Waveform Compensation to 15% of third harmonic content. Instantaneous Overload 35x AC rating, 100x DC rating Voltage to Ground 1200V dc or peak ac, 800 volts ac rms Shielding Magnetically shielded Net Weight 1 1 /2 pound Input self-contained DC 50µA to 50A 50mV to 750V AC 10mA to 20A 5V to 600V 252 Edgewise Transducer-type frequency meters, varmeter, wattmeters and power factor meters are available. MECHANISM The DC instrument is of the permanent magnet moving-coil type in a core magnet construction. For ac measurement the same mechanism is used, but rectifiers and an rms network are added. This design is practically immune to the effects of magnetic fields from adjacent conductors regardless of their orientation. CONSTRUCTION All components are mounted on a plastic drawer which slides into a plastic case with a clear, curved window. The entire assembly is treated to be static free. The plastic is polycarbonate (ASTM D635) for impact strength and flame retardance. Pointer edge and dial markings are on the same arc so that there is no paralax error. Instruments may be stacked horizontally or vertically. See more information online at weschler.com/analog ALSO AVAILABLE: 351/371 panel Airpax panel 20/20 panel 221/251 55

DC Ammeters - Zero Left, self-contained 50 μa 1 11 2 CYCY 100 μa 1 11 2 DRDR 200 μa 1 11 2 EAEA 500 μa 1 11 2 EMEM 1 ma 1 11 2 FAFA 5 ma 1 11 2 FXFX 10 ma 1 11 2 GZGZ 20 ma 1 11 2 HFHF 25 ma 1 11 2

5 Yokogawa Edgewise Panel Meters DC & AC Meters Four Display Sizes: 1½", 2", 2½" and 3½" Horizontal or Vertical Orientation Meets ANSI C-39.1 Shielded, Dust Tight Case (Model 185) Stackable Mounting ORDERING INFORMATION Use Ordering Code Guide to complete Part #. Insert Model Code in box 1 and Orientation in box 2. DC Ammeters - Zero Left, self-contained 50 μa CYCY 100 μa DRDR 200 μa EAEA 500 μa EMEM 1 ma FAFA 5 ma FXFX 10 ma GZGZ 20 ma HFHF 25 ma HJHJ 50 ma HYHY 100 ma JRJR 250 ma KDKD 300 ma KGKG 500 ma KMKM 1 Amp LALA 1.5 Amp LCLC 2 Amp LELE 3 Amp LJLJ 5 Amp LSLS 10 Amp MTMT ** DC Ammeters - Zero Center, self-contained μa CYCY μa DRDR μa EMEM ma FAFA ma FXFX ma HYHY Amp LSLS DC Ammeters - Zero Left, 50mV Shunt Rated (Lead Resistance: Ω) Scale: 1 Amp ECLA 5 Amp ECLS 10 Amp ECMT 20 Amp ECNG 50 Amp ECNT 300 Amp ECRX 500 Amp ECSF DC Ammeters - Zero Left, 100mV Shunt Rated (Lead Resistance: Ω) Scale: 1 Amp GBLA 5 Amp GBLS 10 Amp GBMT 20 Amp GMNG 50 Amp GBNT 300 Amp GBRX 500 Amp GBSF Model Nominal Size 2" 1½" 2½" 3½" Face Dimensions 0.92" x 2.258" 0.498" x 1.719" 0.673" x 2.645" 0.673" x 3.525" Bezel Dimensions 1.255" x 3.025" 0.77" x 2.075" 0.99" x 3.015" 0.99" x 3.89" Depth behind panel (incl studs) 3.3" 2.47" 3.42" 3.21" Cutout (single) 0.94" x 2.286" 0.5" x 1.650" 0.687" x 2.580" 0.687" x 3.460" Scale Length 1.78" 1.25" 1.93" 2.70" Dielectric Rating RMS 1800V 1500V 1500V 2600V Overshoot (max) 40% 25% 40% 40% Accuracy 2% DC, 3% 60Hz sine Response Time Overload Stack Mounted 2 sec for DC & 2.5 sec for AC, except 3 sec for μa 185: Voltmeter 50% momentary, 20% sustained; Ammeter 900% momentary, 20% sustained 280 Series: DC Voltmeter 20% momentary & sustained; DC Ammeter 20% sustained DC Voltmeters - Zero Left 1000Ω/V 10 Volts MTMT 15 Volts NDND 30 Volts NLNL 50 Volts NTNT 100 Volts PKPK 150 Volts PZPZ 200 Volts RLRL * 300 Volts RXRX * DC Voltmeters - Zero Left, Rated 0-1mADC (for use with External Resistor not included) Scale: 500 Volts FASF 600 Volts FASJ 750 Volts FASM DC Voltmeters - Zero Center, self-contained (1000Ω/V except 2000Ω/V in Model 185) Volts NDND Volts NLNL Volts NTNT Volts PZPZ * 1 2 ORDERING CODE GUIDE Insert Model Number: 185 2" Edgewise 286 1½" Edgewise 287 2½" Edgewise 288 3½" Edgewise Insert Orientation: Zero Left Meters: 1 Horizontal 3 Vertical Zero Center Meters: 2 Horizontal 4 Vertical 280 Series - 3 Sizes AC Voltmeters - Zero Left, Rectifier Type 1000Ω/V 10 Volts MTMT 15 Volts NDND 30 Volts NLNL 50 Volts NTNT 100 Volts PKPK 150 Volts PZPZ AC Ammeters - Zero Left, Rectifier Type 500 μa EMEM 1 ma FAFA 5 ma FXFX 10 ma GZGZ 20 ma HFHF * Not available in 1½" ** Model 185 only OPTIONS Custom Scaling Non-standard Ranges Pointer Color Color Bands External Resistor Bezel Mounting Kit (Model 185) Stacked Mounting Bezel & mounting hardware included with 280 Series. Order separately for Model a

Yokogawa Edgewise Switchboard Meters Accuracy Class Standard: ±1.5% of FS span AC horizontal; ±2% for AC vertical Repeatability: ±2% of FS Operating Environment Temp.

6 Yokogawa Edgewise Switchboard Meters Accuracy Class Standard: ±1.5% of FS span AC horizontal; ±2% for AC vertical Repeatability: ±2% of FS Operating Environment Temp.: -4 F to 150 F (-20 C to 65 C) Panel Mounting: Vertical or Horizontal Case Size: 2.294" H x 6.040" W x 5.765" D Panel Cutout: 1.791" x 5.695" AC Amperes Type: Iron-Vane Frequency: 40/70 Hz AC Volts Type: Iron-Vane Frequency: 60 Hz DC AMPERES ORDERING GUIDE Rating Scale Vertical Horizontal 1-5 ma ** FYAA 8ABA FYAA 8ABA 4-20 ma ** HEAA 8ABA HEAA 8ABA ma ** HXAA 8ABA HXAA 8ABA DC Amperes Scale/ Terminal Rating Resistance Vertical Horizontal 0-50 µa CYCY CYCY µa DRDR DRDR µa EMEM EMEM 0-1 ma FAFA FAFA 0-10 ma GZGZ GZGZ ma KMKM KMKM 0-1A LALA LALA 0-5A LSLS LSLS 0-10A MTMT MTMT 0-30A NLNL NLNL 0-50A NTNT NTNT DC Ammeters-50mV Shunt Rated Scale/ Terminal Rating Resistance Vertical Horizontal ECMT ECMT ECNL ECNL ECNW ECNW ECPK ECPK ECRL ECRL ECSC ECSC 0-1KA ECVA ECVA DC Volts-1000 Ω/Volt Rating/ Terminal Scale Resistance Vertical Horizontal LALA LALA LSLS LSLS NDND NDND NTNT NTNT PZPZ PZPZ RXRX RXRX SJSJ SJSJ PZPZ PZPZ RXRX RXRX 180 AC AMPERES ORDERING GUIDE AC Amperes 50/70 Hz, Iron Vane Scale Transformer ±2% Accuracy ±1.5% Accuracy Rating Vertical Horizontal 0-1A LALA LALA 0-5A Self LSLS LSLS 0-10A Contained MTMT MTMT 0-20A NGNG NGNG 0-30A NLNL NLNL 0-50A NTNT NTNT AC Amperes Transformer Rated, 5A 0-10A 10/ LSMT LSMT 0-25A 25/ LSNJ LSNJ 0-50A 50/ LSNT LSNT 0-75A 75/ LSPB LSPB 0-100A 100/ LSPK LSPK 0-150A 150/ LSPZ LSPZ 0-200A 200/ LSRL LSRL 0-400A 400/ LSSC LSSC 0-500A 500/ LSSF LSSF 0-1 ka 1000/ LSVA LSVA ka 1200/ LSVB LSVB ka 1500/ LSVC LSVC AC Voltmeters 60 Hz, Iron-Vane Type 0-150V PZPZ PZPZ 0-300V Self RXRX RXRX 0-500V Contained SFSF SFSF 0-600V SJSJ SJSJ AC Voltmeters Transformer-Rated, 150 Volt / PZRX PZRX / PZSJ PZSJ / PZSM PZSM 0-3 KV 2400/ PZVJ PZVJ KV 4200/ PZVV PZVV 0-6 KV 4800/ PZVX PZVX 56

International Instruments Edgewise Panel Meters

International Instruments Edgewise Panel Meters 3 1 /2" and 6" Switchboard Meters Accuracy: ±1.5% (1151/1251) Single (1146/1151) or Dual Indicators (1246/1251) Rugged Construction Flush Stacking EMI Shielded