PANEL METERS - Electro-Meters

1 PANEL METERSPANEL METERSYOKOGAWA Supplies A Complete Lineof Precise PANEL METERS ..Elapsed Time MetersDevices will match the frequency of ACpower systems. Six-digit counters recordhours, tenths of hours, minutes andtenths of minutes. Reset or non-resetmodels Line PANEL MetersThese METERS possess the same precision qualities as New Big Look. In addition, Horizon Line PANEL meterscan be front or rear mounted on Big Look PANEL MetersThese METERS feature extra-wide scales,big bold numerals above the scale anddivisions for unobstructed needle-sharp pointers andshadow-free acrylic covers help to pinpoint values. Available in taut bandand pivot and jewel types. Gasket sealergives New Big Look dust and moistureresistant design. (Except 11 2 ).Stylist Series PANEL MetersAvailable in Window mount or Surfacemount styles. Optional bezels forSurface mount permit rear PANEL mount-ing.

2 Standard movement torque toweight ratio is approximately 4 timesgreater than most other manufacturer shigh torque edgewise metersOur thin element design provides themaximum performance in the smallestof spaces. Available in 11 2 to 31 2 sizesfor vertical or horizontal MetersYOKOGAWA s answer to the squeeze forspace problem. This design allowsmeters to be mounted vertically or hori-zontally. They can stand alone or bestacked in space-saving clusters. Built-inmagnetic shielding prevents interferenceamong METERS and removes the burdenof special Offers These Advantages ..Dust Resistant ConstructionYOKOGAWA Big Look PANEL METERS ,except 11 2 , feature gasketed construction to seal out dust and other air-suspended damaging is ideal for adverse environments. Special dust resistant features are included on all YOKOGAWANew Big Look METERS , (except 11 2 ). For more severe applications, to meet UL-1437 or IEC 144 requirements, othermodels are also available upon Mounting ForHorizon LineHorizon Line PANEL METERS can bemounted either behind or in front of thepanel.

3 Behind- PANEL mounting is easy .. just remove snap-off mask andmount. No special mounting hardwareor bezel is required. This design featureimproves PANEL appearance .. savestime and money. When illuminatedscales are required, simply position lightsource as shown, or in any suitableposition along the edge of the Mounting Types Available in Stylist SeriesRear PANEL Window MountFront of PANEL Surface MountRear PANEL Surface Mount Available withOptional BezelClean, Readable Case DesignProvides Extra SafetyYOKOGAWA s brand New Big Look andHorizon Line PANEL METERS are designedto provide attractive styling, quick, surereadability for any application .. and abuilt in safety feature to help you meetnational safety requirements. If you mustremove the acrylic cover, you have toremove the instrument itself from thepanel in order to reach the special safetyscrews holding on the cover. Removingthe meter prevents shock hazard.

4 Thissafety feature is standard on all New BigLook and Horizon Line Sealing Design Establishes A NewIndustry StandardDust resistant construction is now a standard feature ofall New Big Look PANEL METERS 21 2 -41 2 's unique gasket sealing design eliminates the need for a crimped bezel, providing for quick modification and scale changes while maintaining theintegrity of the u t B a n dTaut band is a means of suspending the moving mechanism between two ribbons ofmetal, obviating the need for pivots, jewels andcontrol springs found in conventional mecha-nisms. The absence of friction resulting from this permits greater sensitivitiesand provides more rugged METERS . Commonfailures of conventional METERS subjected toshock testing are cracked jewels and/or blunted pivots. Taut band, without pivot andjewels, consequently, will withstand shock inexcess of that specified for pivot and jewelmeters.

5 For example, ANSI Specifications forpanel METERS require 50G shock. Taut-bandmeters will withstand 100G and JewelIn this design the coil and pointer are supported by polished steel pivots at each end which fit into jewel bearings. Pivot andjewel METERS are recommended for high-vibration environments because of the mechanism s inherent stability and and repeatability are almost equal to the taut-band s, and good performancefrom the pivot and jewel construction is thereason for its long popularity. Don t specifypivot and jewel METERS for applications thatinvolve high shock, but do take advantage of this meter s ability to withstand DC VoltmetersStandard DC voltmeter sensitivity is 1000ohms/volt. Expressed differently, 1000ohms/volt sensitivity means that the meterdraws approximately one milliamp lower current drains are necessary, hence higher sensitivities may berequired.

6 The table below compares availablesensitivities, maximum self-contained voltages, and approximate full-scale voltage range could be extended by using external VoltmetersFor very close monitoring of voltages, Zenerdiode expanded scale voltmeters are available in 31 2- and 41 2-inch sizes for AC andDC ratings. Accuracy is of full-scale value. Standard voltage spans are listed in Ratings. Expanded scale voltmeters can be furnished for any mid-span values from 12 to 300 volts. Minimum span is 16% of mid-span Effect AC MetersIron vane voltmeters are sensitive to frequency and should not be used on frequencies other than design frequency.(Standard voltmeters are calibrated at 60 Hertz. Used at 50 Hertz, accuracy becomes 21 4%. There are also 150- and 300-volt ratings listed which are calibrated at 400 Hertz). For calibrations at frequencies otherthan 60 and 400 Hertz, refer to Iron-vane ammeters (which produce a conventional scale distribution with divisionscrowded in lower third of scale) from 10 milliamperes to 50 amperes are virtually unaf-fected by a change in frequency; , a stockammeter (calibrated at 60 Hertz) when used at400 Hertz incurs an additional error of only.

7 5percent full-scale. If used on 1000 Hertz, theadditional error is 4 percent. We recommenduse of stock (60 Hertz) ammeters on any frequency in the range of 25 Hertz to 400 Hertz. For calibration at frequencies outsidethe 25-Hertz to 400-Hertz range, refer to factory or use a rectifier-type AC MetersRectifier-type METERS differ from iron-vanemechanisms in that: They provide a nominally linear (DC) scalerather than conventional iron-vane distributionwhich has a slight crowding at low end ofscale. AC current measurements of microamperesand milliamperes at minimum power consumption are permitted. AC voltmeters of higher sensitivity(ohms/volt) than iron-vane types can be made. Frequency response of rectifier type metersis essentially flat from 20 to 1,000 Hertz (1%effect from reference to 60 Hertz).Rectifier-type METERS employ a full-wave rectifier and are available in ratings of 500 A to DC MetersDC METERS can be mechanically suppressedup to 20% of end-scale value.

8 However, additional errors are introduced by sup-pressions; ,Errors at 20% suppression = 3% of end-scaleMany process transmitters in use today provide a 4-20mA signal (occasionally 10-50mA or 1-5mA) and require a suppressed-zerometer with operating zero set. These areknown as live-zero and are AccuracyStandard calibration accuracy is 2% of fullscale. DC METERS can be calibrated to 1% offull scale as a special model in 31 2 and 41 2 with mirrored Mounting Case 21 2-inch New BigLook MeterAvailable only for 21 2-inch Type 250 panelmeters, for indoor or outdoor use, the conduit-mounted case provides protection to the meterunder severe environmental conditions. Theconduit case is both sealed and weatherproofand is pre-drilled, ready for mounting of sepa-rately ordered PANEL METERS . Assembly of meterinto case is done by purchaser. (Drawing )Data subject to change without LOOK & HORIZON LINESIZE/RATING11 221 231 241 211 221 231 241 2DC CURRENT10 A20 A50 ADC VOLTAGE50mV50mVAC CURRENT (IRON VANE)---10mA---10mAAC VOLTAGE (IRON VANE)---3V---3 VAC CURRENT (RECTIFIER)1mA500 AAC VOLTAGE (RECTIFIER)3V10 VDC CURRENT10A50A15A30A50 ADC VOLTAGE1000V300V600 VAC CURRENT (IRON VANE)---50A---30A80 AAC VOLTAGE (IRON VANE)---600V---300V600 VAC CURRENT (RECTIFIER)100mA30A20mAAC VOLTAGE (RECTIFIER)600V150V300 VNew Big Look, Horizon Line and StylistPanel MetersMaximum and Minimum RatingsIn general, the maximum and minimum ratings of current and voltage are thoselisted in Ratings.

9 Listed are rating limitsfor self-contained greater than those listed can beaccomplished by use of external shunts,resistors or transformers. METERS to beused with external accessories are shownin Ratings. See page 29 for Shunts, resistors and RATINGMAXIMUM RATING1 NewHorizonStylistElapsed185280 BigLineTimeEdgewiseEdgewiseLookDC Voltmeters2-38142627DC Ammeters3-58-1015-162628DC Microammeters38-9152628DC Milliammeters49152628AC Voltmeters5-610-11172628AC Ammeters6-711-1217-1928AC Microammeters6112628AC Milliammeters61217, 182628AC Frequency Meters131319AC Motor Load Indicators1212 Expanded Scale Voltmeters3,58, 1114, 17 Elapsed Time Meters24-25 Terminal Resistance Values20-2120-2122-232627-28 Cross Reference to Other Manufacturers323232 Electrical and Physical Options30-3130-3130-3130-3130-31 Par ts & Accessories29292925, 2927, 29 Dimensional Drawings32-3334-353638, 393738 Table of ContentsKey to 200-Prefix Catalog NumbersDigits 1, 2, and 3 Style250 - New Big Look (Taut Band), (I/V*-P&J)251 - Horizon Line (Taut Band), (I/V*-P&J)254 - New Big Look (P&J)255 - Horizon Line (P&J)

10 260 - Surface Mount (Taut Band), (I/V*-P&J)261 - Window Mount (Taut Band), (I/V*-P&J)264 - (P&J) Surface Mount265 - (P&J) Window MountDigit 4 - Size1 - 11 2 2 - 21 2 3 - 31 2 4 - 41 2 Digits 5 and 6 Elec. and Mechanical Variables00 - DC Amps Zero-Left01 - DC Amps Zero-Center04 - DC Volts/Ext. Res. Zero-Left05 - DC Volts/Ext. Res. Zero-Center10 - AC Amps Rectified20 - DC Volts Zero-Left21 - DC Volts Zero-Center24 - DC Millivolts Zero-Left25 - DC Millivolts Zero-Center30 - AC Volts Rectified37 - AC Expanded Scale Voltmeter38 - DC Expanded Scale Voltmeter40 - AC Amps (I/V)* 60 Hz44 - AC Volts (I//V)* 60 Hz45 - AC Volts 400 Hz (I/V)*50 - FrequencyDigits 7 and 8 - Elec. RatingExample:LS = 5 AmpsMT = 10 AmpsNG = 20 AmpsDigits 9 and 10 - ScaleExample:LS = 0-5 AmpsMT= 0-10 AmpsNG = 0-20 AmpsDigit 11 - Factory StyleFor factory 12, 13, 14, 15, 16, 17-21 Special UnitsWhen used, these denoteunique models.