Valhalla Scientific Inc. 2013 Level Meter
Manufacturer:
Model:
2013
Date:
Category:
Group:
Description:
Dual Channel PolyPhase Digital Wattmeter

Information

Valhalla Scientific^ Dual Channel, Polyphase, Digital Wattmeters are accurate, moderate-cost instruments for power analysis in engineering, production test and quality assurance departments. They provide indication of product power consumption in the 10 Hz to 50 KHz range for devices operating from AC power lines. Voltage, current and power are shown simultaneously on separate digital displays. Two separate voltage and current input channels may be displayed separately or in combined form, permitting single phase, two phase-and three phase measurements of all three parameters. Voltage and current readings are true R M S; power is true watts (El cos Θ ). These Wattmeters provide a fast and convenient means of determining product efficiency, power factor and true RM S current. Load phase angle relationships may be accurately calculated using the displayed digital data. The power computation section of the Wattmeter uses unique four-quadrant complex waveform analog multipliers. Their outputs are DC signals proportional to the product of the instantaneous values of voltage and current in each of two channels. Two resultant wattage values are integrated, summed and presented on a 4 1/2 digit display. Ranges of 100% and 2 0 % of the instrument’s maximum current are switch-selectable. Additional switching permits separate display of either input channel. The Wattmeters are designed to operate from a 115 or 230 volt, 50-60HZ AC supply. Power is supplied through a Plug-In cord equipped with a 115 volt, 15 amp connector. Other connector types are available upon request

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Service and User Manual
Manual type:
Service and User Manual
Pages:
31
Size:
1.45 Mbytes (1523980 Bytes)
Language:
english
Revision:
Manual ID:
Date:
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
02 August 2016
MD5:
ee37069cbf4b35fa30bd3a5a4bcdab78
Downloads:
2536

Information

SEC T IO N I — G EN ER A L INFORMATION D escription ... 1-1 Option R X 3 ... 1-1 Option IDO ... 1-1 1-1 1-7 1-9 SEC T IO N II— INSTALLATION 2-1 2-3 2-6 2-8 Introduction ... 2-1 Initial Inspection ... ... 2-1 Power Requirements ... 2-1 Installation ... 2-1 SEC T IO N III— O PERATIO N Г 3-1 3-3 3-5 3-7 3-9 3-11 3-13 3-15 Introduction ... 3-1 Front Panel Controls ... 3-1 Front Panel Indicators ... 3-1 Rear Panel Connections ... . 3-1 Voltmeter ... 3-3 A m m e te r ... 3-3 W attm eter ... 3-3 Two-Wattmeter Method of Three Phase Power M easurem ent ... 3-3 3-17 Power Factor Calculation ... ·.--- 3-4 3-19 Phase Angle Calculation ... ... . 3 - 4 S E C T IO N IV —-THEORY O F O PERATIO N 4-1 4-3 4-5 General ... 4-1 Functional Description ... ... 4-1 Voltmeter ... 4-1 Para. Page 4-8 4-11 4-14 4-16 4-18 4-20 4-22 4-24 4-26 4-29 4-31 4-33 4-35 4-37 4-39 4-41 4-43 4-45 4-47 4-49 4-51 4-53 A m m e ter ... 4-1 W attm eter ... 4-1 Detailed Circuit Description ... 4-2 Voltage Input C ircu its ... 4-2 Current Input C ircu its ... 4-2 Multiplier and Multiplier Output Amplifier .. 4-2 Power Display Summing Amplifier ... 4-2 Amplifier/Filter ... 4-2 Power Analog and Digital Pro cesso rs ... 4-4 Power Display ... ... 4-4 Current Display Summing A m p lifier ... 4-4 Current RMS-To-DC Converter ... 4-4 Current Analog and Digital Processors ___ 4-4 Current D is p la y ... 4-4 Voltage Display Summing A m p lifier ... 4-4 Voltage RMS-To-DC C o n ve rte r ... ... 4-4 Voltage Analog and Digital Processors ... 4-4 Voltage D is p la y ... 4-4 Clock Generator ... 4-5 Voltage Reference ... 4-5 Overscale Indicator ... 4-5 Power S u p p ly ... ... 4-5 5-29 SECTIO N V — MAINTENANCE Introduction ... 5-1 Recommended Test Equipment ... 5-1 Calibration P r o c e d u r e ... 5-1 Initial Adjustments ... 5-1 Voltage Section Calibration ... ... 5-1 Current Section Calibration ... 5-3 Power Section C alibration ... 5-3

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