Yokogawa AC Frequency Meter
Self-Contained, Accuracy ±3 Percent of Span

Can come in either New Big Look or Horizon Line Models
New Big Look Models
- Dust Resistant Construction
- Clean, Readable Case Design Provides Extra Safety
- Gasket Sealing Design Establishes A New Industry Standard
- Pivot and Jewel Options
- Frequency Effect — AC Meters
- Rectifier-Type Meters
Horizon Line Models
- Extra-wide scales
- Big bold numerals above the scale
- Divisions for unobstructed reading
- Tapered needle-sharp pointers
- Shadow-free acrylic covers help pinpoint values
- Available in taut band and pivot and jewel types.
- Gasket sealer gives New Big Look dust and moisture resistant design. (Except 1-1/2”).

Yokogawa New Big Look Panel Meters
Shown

Yokogawa Horizon Line Panel Meters
Shown

Product Information
Ordering Guide
Ordering Info
PDF Help

These meters feature extra wide scales, big bold numerals above the scale and divisions for unobstructed reading. Tapered needle sharp pointers and shadow free acrylic covers help to pinpoint values. Meters are available in taut band or pivot and jewel elements. They meet ANSI C39.1. In addition to these features, these meters are also available to meet UL/CSA and/or IEC specifications and can be easily modified to most custom applications.

New Big Look Panel Meters and Horizon Line from the Yokogawa line of panel meters feature extra-wide scales, big bold numerals above the scale and divisions for unobstructed reading. Tapered needle-sharp pointers and shadow-free acrylic covers help to pinpoint values.

The Horizon Line from the Yokogawa line of panel meters can be mounted from the front or rear of the panel. Behind the panel mounting is easy; simply remove the snap-off mask and mount. No special mounting hardware or bezels are required. All Horizon Line panel meters are available in a variety of sizes and mounting configurations based on the customer application. This built in interchangeability eliminates the need for drawing changes and redrilling of panels. Available in taut band and pivot and jewel types. Gasket sealer gives New Big Look dust and moisture resistant design. (Except 1 1⁄2").

Dust Resistant Construction.
YOKOGAWA Horizon Line panel meters, except 1-1/2”, feature gasketed construction to seal out dust and other air-suspended damaging particles. Application is ideal for adverse environments. Special dust resistant features are included on all YOKOGAWA New Big Look meters (except 1-1/2”). For more severe applications, to meet UL-1437 or IEC 144 requirements, other models are also available upon request.

Clean, Readable Case Design Provides Extra Safety:
YOKOGAWA’s brand Horizon Line panel meters are designed to provide attractive styling, quick, sure readability for any application, and a built in safety feature to help you meet national safety requirements. If you must remove the acrylic cover, you have to remove the instrument itself from the panel in order to reach the special safety screws holding on the cover. Removing the meter prevents shock hazard. This safety feature is standard on all New Big Look and Horizon Line meters.

Pivot and Jewel:
In this design the coil and pointer are supported by polished steel pivots at each end which fit into jewel bearings. Pivot and jewel meters are recommended for high vibration environments because of the mechanism’s inherent stability and strength. Accuracy and repeatability are almost equal to the taut-band’s, and good performance from the pivot and jewel construction is the reason for its long popularity. Don’t specify pivot and jewel meters for applications that involve high shock, but do take advantage of this meter’s ability to withstand vibration.

Frequency Effect — AC Meters:
Iron 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 ±2-1/4%. There are also 150- and 300-volt ratings listed which are calibrated at 400 Hertz). For calibrations at frequencies other than 60 and 400 Hertz, refer to factory.

All Iron-vane ammeters (which produce a conventional scale distribution with divisions crowded in lower third of scale) from 10 milliamperes to 50 amperes are virtually unaffected by a change in frequency; e.g., a stock ammeter (calibrated at 60 Hertz) when used at 400 Hertz incurs an additional error of only .5 percent full-scale. If used on 1000 Hertz, the additional error is 4 percent. We recommend use of stock (60 Hertz) ammeters on any frequency in the range of 25 Hertz to 400 Hertz. For calibration at frequencies outside the 25-Hertz to 400-Hertz range, refer to factory or use a rectifier-type AC ammeter.

Higher Accuracy:
Standard calibration accuracy is ±2% of full scale. DC meters can be calibrated to ±1% of full scale as a special model in 3-1/2” and 4-1/2” with mirrored scale.

Conduit Mounting Case — (2-1/2-inch New Big Look Meter)
Available only for 2-1/2-inch Type 250 panel meters, for indoor or outdoor use, the conduit mounted case provides protection to the meter under severe environmental conditions. The conduit case is both sealed and weatherproof and is pre-drilled, ready for mounting of separately ordered panel meters. Assembly of meter into case is done by purchaser. (Drawing No. 2579K10700.)

General Specifications
	Meter Style	New Big Look	Horizon Line
Scale Data		90 degree rotation
Scale Length	2 1/2"	2.06"	2.06"
	3 1/2"	2.88"	2.88"
	4 1/2"	3.93"	3.93"
Response Time and Overshoot		3 seconds (max.) for 21⁄2", 31⁄2", 41⁄2" size for microammeters; 2 seconds (max.) for all other DC ratings, and 2.5 seconds (max) for AC ratings. Maximum of 40% overshoot.
Additional Notes		Meter with flame retardant window and base in 2 1⁄2", 3 1⁄2" and 4 1⁄2" sizes are available that conform to UL1437. Include /CUL or /UL at the end of the catalog number or contact factory. Sealed meters for outdoor use can be ordered in 2 1⁄2", 3 1⁄2" and 4 1⁄2" sizes by including /IEC at the end of the catalog number, or contact factory. For ratings and scales not listed contact the factory.

Ordering Guide:
Step 1
Specifications	New Big Look Meter		Horizon Line Meter
Specifications	Taut Band	Pivot and Jewel	Taut Band	Pivot and Jewel
2 1/2"	250 250	254 250	251 250	255 250
3 1/2"	250 350	254 350	251 350	255 350
4 1/2"	250 450	254 450	251 450	255 450

Step 2
Voltage	Center Frequency Hertz	Scale Hertz
120	50	45-55	AGAG
120	55	45-69	AJAJ
120	60	55-65	ANAN
120	400	380-420	BKBK
208	50	45-55	GGGG
208	55	45-69	GJGJ
208	60	55-65	GNGN
208	400	380-420	HKHK
240	50	45-55	DGDG
240	55	45-69	DJDJ
240	60	55-65	DNDN
240	400	380-420	EKEK

Example Product
	Scale Size and Type	Scale & Rating
New Horizon Panel Meters, 4 1/2" Pivot & Jewel Panel Meter, AC Frequency Meter, Self-Contained, Accuracy ±3 Percent of Span; I.E. 0.3 Hz for 45-55 and 55-65, and 1.2 Hz for 380 - 420 Range	255 450	GGGG
	255 450 GGGG

Ordering Information
Model	Description	Price
AC Frequency Meter	AC Frequency Meter, Self-Contained, Accuracy ±3 Percent of Span	Please Call

Yokogawa AC Frequency Meter Self-Contained, Accuracy ±3 Percent of Span

Yokogawa AC Frequency Meter
Self-Contained, Accuracy ±3 Percent of Span