Yokogawa 2492 Power Series Plus
Digital Switchboard Meter
AC Watt/Var Dual Function

Scaling of the instrument for PT (potential transformer) primary ratings up to 1250:1; and CT (current transformer) primary ratings up to 5000:1.
Adjustable transducer output proportionate to the primary input setting.
Electrical legends (i.e., Watts, Kilowatts, Megawatts) can be set by the user and indicated by a red LED adjacent to the selected legend.
Display average setting: Adjustable to obtain a “rolling average” of inputs. Increasing the number of samples reduces annoying “digit bounce” by the least significant digit.
All settings are stored in non-volatile memory. If there is a loss of power to the instrument, all settings will remain as they were prior to power loss.
Accuracy of ±0.2% of reading, ±0.1% of full scale.
True RMS current and voltage measuring capability. A most desirable feature when distorted wave forms are present on the line.
High resolution/ high intensity LED displays that can be viewed from almost any angle.

Yokogawa 2492 Shown

Product Information
Datasheet	1.3 MB
Ordering Info
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The POWER SERIES Plus digital switchboard meter was developed by Yokogawa Corporation of America to provide our customers with a versatile AC digital power meter. The heart of our POWER SERIES Plus meter is a programmable ASIC Power Measurement Chip (PMC) which was jointly developed by the General Electric Company and Yokogawa Electric Corporation. This unique PMC capability will continue to expand into many new power measurement and control products offered by Yokogawa Corporation of America.

The design of the POWER SERIES Plus combines a high accuracy digital switchboard meter with transducer output which can be configured in the field by an end-user, or when installed in new electrical equipment by an OEM. It eliminates requirements for a large inventory of dedicated instruments, and provides flexibility when new panel designs or system upgrades require changes in instrument transformer ratings. Our rugged metal case fits standard panel cutouts for switchboard meters and makes it a perfect replacement for less versatile instruments. The RS-485 communications option allows up to 32meters to be networked together for remote monitoring and control. In addition, the POWER SERIES Plus can be set up and locked out for security via the remote communications option.

Up to Three Screen
Ideally designed for easy retrofit into existing switchboard meter panel cutouts.
The 2491 has only one, easy to screen LED screen, while the 2492 features two different LED screens, to aid the user in comparing two different frequencies.

Highly Customizable
The POWER SERIES Plus can be configured for primary and secondary transformer inputs, legends, outputs and averaging function. At Yokogawa, we program each model according to the specified options required by the user. This minimizes the number of steps to set up the instrument at the job site or on the factory floor.

Each model is programmed only for the options selected, so there are no unnecessary menu items. If you select a Voltmeter without analog output, then set up will be limited to PT ratios, LED display, and average setting. All can be accomplished in less than one minute. If no transformer is required, the ratio entered for PT P and PT S is 1 (1:1).

Sturdy Construction
The POWER SERIES Plus is enclosed in a rugged steel case treated with zinc chromate to resist corrosion. The cover assembly and faceplate are constructed of high temperature polycarbonate material and have several gaskets which seal out dust and moisture from the front cover. The 26 position terminal board is a glass-filled polycarbonate material with #8 nickel-plated brass terminals inserted.

Power Series Plus - General Specifications
Watt/Var Dual Function Measuring Capabilities	Available Connection	1P2W 1P3W 3p3w 3p4W (2 1/2 Element) 3p4w (3 element)
	Maximum Input Rating	120 Volt/1 Amp 240 Volt/1 Amp 120 Volt/5 Amp 240 Volt/5 Amp
	Electrical Legend	Watts/Kilowatts Megawatts Vars/Kilovars Megavars
Display	Type	4 digit red LED (9999 counts)
	Response Time	200ms min. update time
Input Rating	Current	0 to 1A AC; 0 to 5A AC
	Voltage	0-120V AC, 0-240V AC (W/VAR/PF/PA) 0-150V AC, 0-300V AC (Volt/Freq)
	Frequency	50/60 Hz and 400 Hz
Input Range	Rated Current	A/W/VAR: 0-200%; PF/PA : 20-200%
	Rated Voltage	V/W/VAR: 0-120%; PF/PA: 50-120%; Frequency: 20-120%
Input Frequency Range	Volts, Amps, Hertz	45-65Hz up to the 9th harmonic measuring capability
		±2% of Specified Accuracy
Sustained Input	Rated Current	A/W/VAR/PF/PA: 200% continuous; 10x rating for 5 seconds
	Rated Voltage	V/W/VAR/FREQ : 120% continuous; PF/PA : 150% continuous
Accuracy	Reference condition: 25°C, 45-74%RH, at rated input 60Hz sine wave, 30 min. warm-up	Voltage	±0.2% of reading ±0.1% of full scale
		Current
		Frequency	±0.01 Hz @ 40-70Hz, ±0.1Hz @ 300-500 Hz
Analog Output and Response Time	0 to 1mA, 0 to ±1mA	10VDC compliance into 10k ohm load maximum
	4 to 20mA, 12 ±8mA	15VDC compliance into 750 ohm maximum 1 second maximum response time within ±1% of final value
Temperature Coefficient	Display and Comm:	±150 PPM/°C maximum of full scale
	Analog Output	±250 PPM/°C maximum of full scale
Influence of	Input Voltage	<0.05 Power Factor (10-120% of rated voltage)
	Input Frequency	<0.05 Power Factor (45-65Hz)
	Load Resistance (Analog Input)	0 to 1mA, 0 to ±1mA : 0 - 10K ohm within ±0.05% of full scale 4 to 20mA, 12 ±8mA : 0-750 ohm within ±0.05% of full scale
Dimension		W x D x H = 4.33 x 6.54 x 4.33 inches

How to Order
Model	2492 Dual Function Digital Switchboard	-#	-#	-#	-#	-#	-#
Functions/ Connections	Watt / Var 1P2W	40
	Watt / Var 1P3W	41
	Watt / Var 3p3w	42
	Watt / Var 3p4W (2 1/2 Element)	43
	Watt / Var 3p4w (3 element)	44
AC Input Rating	120 Volt/1 Amp		12
	120 Volt/5 Amp		13
	240 Volt/1 Amp		16
	240 Volt/5 Amp		17
Frequency	50/60 Hz			5
	400 Hz			6
Analog Output	No Output				AAA
	0 to 1 mA				AFA
	4 to 20 mA				AHD
Communication	None					0
	RS-485					1
Aux. Power Supply	120 V 50/60 Hz						1
	240 V 50/60 Hz						2
Notes	1) Maximum scaling ratio for volts is 1250:1; For amps it is 5000:1 2) NIST Calibration Certificate: Specify and add $50.00 each per unit. 3) NIST Calibration Certificate with Test Data: Specify and add $100.00 each per unit. 4) Certificate of Conformance: No charge, but specify with order.

Example Product
	Base Model	Functions/ Connections	AC Input Rating	Frequency	Analog Output	Communication	Aux. Power Supply
Dual Function Digital Switchboard Watt / Var 3p4W (2 1/2 Element) 240 Volt/5 Amp 50/60 Hz 0 to 1 mA RS-485 120 V 50/60 Hz	2492	43	17	5	AFA	1	1
	2492-43-17-5-AFA-1-1

Ordering Information
Model	Description	Price
2942	Yokogawa 2940 Power Series Plus Digital Switchboards, Dual Function	Please Call

Yokogawa 2492 Power Series Plus Digital Switchboard Meter AC Watt/Var Dual Function

Yokogawa 2492 Power Series Plus
Digital Switchboard Meter
AC Watt/Var Dual Function