Apparecchiature informatiche

Valhalla Scientifiс , Inc . 2093 Metro di livello
Produttore:
Valhalla Scientifiс , Inc .
Modello: 2093
Data:
Categoria: Strumenti di misura
Gruppo: Metro di livello
Descrizione: Dual Channel PolyPhase Digital Wattmeter
Informazioni:
                                    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

Questi manuali sono disponibili per l'attrezzatura di cui sopra:

Valhalla Scientifiс , Inc . -- 2093 -- Servizio e manuale utente
Nome del file: Valhalla-7974-Manual-Page-1-Picture
Tipo manuale: Servizio e manuale utente
Pagine: 31
Dimensioni: 1.45 Mbytes (1523980 Bytes)
Lingua: Inglese
Revisione:
Manuale-ID/numero:
Data:
Qualità: Documento scansionato, la lettura in parte male, non in parte leggibile.
Data di aggiunta:
MD5: ee37069cbf4b35fa30bd3a5a4bcdab78
Downloads: 84 dal 02 agosto 2016
Informazioni:
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
Valhalla-7974-Manual-Page-1-Picture
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