Yokogawa Horizon Line Panel Meters
AC Ammeter, Transformer Rated, 25 - 400 Hz, Iron Vane Type

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 Horizon Line Panel Meters
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Product Information
Ordering Guide
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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.

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.

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.

Horizon Line Panel Meters - General Specifications
Accuracy	AC/DC Iron-Vane	±2% of full-scale
	AC Rectifier Types	±3% of Full scale (with 60Hz sine wave at 25°C)
		When standard 60 Hz iron vane ammeters are used at the extreme limits of 20 or 400 Hz, additional error (approx. .75%) may be experienced.
	Expanded Voltmeters	±0.5% of full-scale
Overload	Voltmeters (AC/DC)	50% Momentary
		20% Sustained
	Ammeters (AC/DC)	Momentary	10 times the rated current for 10 consecutive intervals of .5 second with a 1 minute interval between successive applications
		Sustained	20% for six hours
Scale Data		90 degree rotation
Scale Length		1 1/2"	1.50"
		2 1/2"	2.06"
		3 1/2"	2.88"
		4 1/2"	3.93"
Insulation Level	1 1/2"	1500 Vrms Hi-pot
	All Meters (other then 1 1/2")	2600 Vrms Hi-pot
Burden Data	AC Ammeter	5 amps, 0.5 va, Max. 0.5 power-factor lagging @ 60 Hz.
	AC Voltmeter	unity power factor
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		Pivot & jewel instruments are not available in 1 1⁄2" size. Meter with flame retardant window and base only available in 2 1⁄2", 3 1⁄2" and 4 1⁄2" sizes. Include /CUL or /UL at the end of the catalog number or contact factory. For ratings and scales not listed contact the factory.

Ordering Guide:
Step 1
Specifications	Pivot and Jewel
1 1/2"	-
2 1/2"	251 240
3 1/2"	251 340
4 1/2"	251 440

Step 2
Scale & Rating	10 Amp	15 Amp	20 Amp	30 Amp	40 Amp
Code	LSMT	LSND	LSNG	LSNL	LSNP
	50 Amp	75 Amp	80 Amp	100 Amp	150 Amp
	LSNT	LSPB	LSPD	LSPK	LSPZ
	200 Amp	300 Amp	400 Amp	500 Amp	600 Amp
	LSRL	LSRX	LSSC	LSSF	LSSJ
	1 Kiloamp	1.2 Kiloamp	1.5 Kiloamp	2 Kiloamp	3 Kiloamp
	LSVA	LSVB	LSVC	LSVE	LSVJ

Example Product
	Scale Size and Type	Scale & Rating
Horizon Line Panel Meters, 2 1/2" Pivot & Jewel Panel Meters, AC Ammeters, Transformer Rated, 25 - 400 Hz, Iron Vane Type, 500 Amp	251 240	LSSF
	251 240 LSSF

Ordering Information
Model	Description	Price
Horizon Line Panel Meters	Yokogawa Horizon Line Panel Meters, AC Ammeter, Transformer Rated, 25 - 400 Hz, Iron Vane Type	Please Call

Yokogawa Horizon Line Panel Meters AC Ammeter, Transformer Rated, 25 - 400 Hz, Iron Vane Type

Yokogawa Horizon Line Panel Meters
AC Ammeter, Transformer Rated, 25 - 400 Hz, Iron Vane Type