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Magtrol 6530 User manual
Summary of 6530
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Model 6530 three-phase power analyzer user’s manual.
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1st edition, rev. D – september 2003 while every precaution has been exercised in the compilation of this document to ensure the accuracy of its contents, magtrol, inc. Assumes no responsibility for errors or omissions. Additionally, no liability is assumed for any damages that may result from the u...
Page 3: Safety Precautions
I 1. Make sure that all magtrol dynamometers and electronic products are earth-grounded, to ensure personal safety and proper operation. 2. Securely ground the 6530 power analyzer case by connecting a good earth ground at the ground stud located on the rear panel of the unit. Use a number 12 awg, or...
Page 4: Revisions to This Manual
Ii the contents of this manual are subject to change without prior notice. Should revisions be necessary, updates to all magtrol user’s manuals can be found at magtrol’s web site at www.Magtrol.Com/support/manuals.Htm . Please compare the date of this manual with the revision date on the web site, t...
Page 5: Table of Contents
Iii table of contents safety precautions ......................................................................................................................... I revisions to this manual .................................................................................................................
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Iv magtrol model 6530 three-phase power analyzer table of contents 4. Operating principles ............................................................................................................... 32 4.1 analog processing ...........................................................................
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V magtrol model 6530 three-phase power analyzer table of contents 8. Troubleshooting ...................................................................................................................... 58 appendix a: schematics .........................................................................
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Vi magtrol model 6530 three-phase power analyzer table of contents table of figures chapter 2 figure 2–1 front panel ............................................................................................................................................. 5 figure 2–2 secondary function menu .......
Page 9: Preface
Vii purpose of this manual this manual contains all the information required for the installation and general use of the model 6530 power analyzer. To achieve maximum capability and ensure proper use of the instrument, please read this manual in its entirety before operating. Keep the manual in a sa...
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Viii magtrol model 6530 three-phase power analyzer preface conventions used in this manual the following symbols and type styles may be used in this manual to highlight certain parts of the text: note: this is intended to draw the operator’s attention to complementary information or advice relating ...
Page 11: 1. Introduction
1 general informa tion calibration certificate 1. Introduction 2. Inspect the contents for any evidence of damage in shipping. In the event of shipping damage, immediately notify the carrier and magtrol's customer service department. Note: save all shipping cartons and packaging material for reuse w...
Page 12: -Odelseand
2 magtrol model 6530 three-phase power analyzer chapter 1 – introduction general informa tion 1.3 data sheet -odelseand 0ower!Nalyzers &%!452%3 s 3ingle4hree0hase#apabilities&orsinglee orthreephasepowermeasurements s 2anges5pto6 rms !Continuousduty s )nterfaces23)%%% s $ata4ransfer2ates5ptopersecond...
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3 magtrol model 6530 three-phase power analyzer chapter 1 – introduction general informa tion e 3pecifications 23#and'0)")%%%)nterfaces for#onnectionto0ersonal#omputer #urrent )nput 6oltage )nput %xternal 3ensor)nput %xternal3ync)nput #ycleby#ycle3ynchronization 0hase)nput-odule for asshown fore /pt...
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4 magtrol model 6530 three-phase power analyzer chapter 1 – introduction general informa tion e $uetothecontinualdevelopmentofourproductswereservetherighttomodifyspecilcationswithoutforewarning /rdering)nformation &eatures s 3imple)nstallation0luginmoduleautomatically configurespoweranalyzerforopera...
Page 15: 2. Controls
5 general informa tion 2. Controls 2.1 front panel the front panel provides a power switch, sixteen control buttons and a vacuum fluorescent display (vfd). Auto peak-cf rms current range voltage range dc peak-cf rms dc cyc-cont source w-va-pf peak hold hold avg auto display phase shift model 6530 po...
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6 magtrol model 6530 three-phase power analyzer chapter 2 – controls general informa tion 2.2.1 e nabling s econdary f unctions to enable the secondary function of the double-function control buttons: 1. Press the blue shift button and release it. The word “shift” appears in the display: current vol...
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7 magtrol model 6530 three-phase power analyzer chapter 2 – controls general informa tion 2.2.2.2 double-function buttons n o t t u b e s u o t n o i t c n u f y a l p s i d n e h t ; e s a e l e r d n a t f i h s s s e r p r e h t r u f r o f ( . N o t t u b s i h t s s e r p e e s , n o i t c u r ...
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8 magtrol model 6530 three-phase power analyzer chapter 2 – controls general informa tion n o t t u b e s u o t n o i t c n u f e c r u o s n e h t ; e s a e l e r d n a t f i h s s s e r p . N o t t u b s i h t s s e r p e l c y c - y b - e l c y c e h t t a h t l a n g i s e h t s t c e l e s . H ...
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9 magtrol model 6530 three-phase power analyzer chapter 2 – controls general informa tion current voltage power/pf device selections figure 2–3 device setup menu 2. Press and buttons until "i/o" appears in the display. 3. Press enter button. 4. Press and buttons until "display brightness" appears in...
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10 magtrol model 6530 three-phase power analyzer chapter 2 – controls general informa tion input module ± v a ± 20 a amps 750 v volts max. Ext. Max. 1000 v max. Max. ±10 v sensor figure 2–5 input module voltage input connect wires to measure voltage across the load (parallel). C aution : v oltage sh...
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11 magtrol model 6530 three-phase power analyzer chapter 2 – controls general informa tion analog output (optional) connects strip chart recorder or data acquisition system. Provides 12 analog outputs, 3 for each phase and 3 for summation. • volts 1, 2, 3, Σ • amps 1, 2, 3, Σ • watts 1, 2, 3, Σ ±10 ...
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12 magtrol model 6530 three-phase power analyzer chapter 2 – controls general informa tion attach power cord here. Warning: make sure that all magtrol dynamometers and electronic products are earth-grounded, to ensure personal safety and proper operation. Securely ground the 6530 power analyzer case...
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13 setup 3. Installation/configuration note: before installing the 6530, you should become familiar with the front and rear panels, as outlined in chapter 2 – controls. 3.1 powering up the 6530 warning! To reduce the risk of electric shock, make sure the 6530 is earth grounded before starting! 3.1.1...
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14 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup then an additional display will appear indicating the version of your magtrol 6530 power analyzer. Current voltage power/pf figure 3–3 revision display 3.1.3 m ain m enu when the 6530 is completely powered ...
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15 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup the custom menu can include up to 6 fields with selections dependent on the measurement mode. Current voltage power/pf figure 3–6 custom main menu 3.2 protecting your 6530 before the 6530 is used for power ...
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16 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup single phase two-wire load three-phase load wye connected three-phase load delta connected low line line high (line) (load) (line 1) (load) neutral l3 l2 l1 1 3 mov > v v line to line v v mov > line to line...
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17 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup 3.3 testing instrumentation setup before the 6530 can be utilized, it must be configured and connected to the devices intended for power measurement. 3.3.1 w iring m ode the 6530 has the ability to support ...
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18 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup 1-phase, 2-wire • measures single-phase power. • can be wired on any input module. • the power factor is derived from the following equations: amps Σ = a x , volts Σ = v x active power = w Ø apparent power ...
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19 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup 1-phase, 3-wire • measures single-phase power. • utilizes input modules one and three. • the power factor is derived from the following equations: amps Σ = (a 1 + a 3 )/2, volts Σ = (v 1 + v 3 )/2 active po...
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20 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup 3-phase, 3-wire • measures three-phase power. • utilizes input modules one and three. • the power factor is derived from the following equations: amps Σ = (a 1 + a 3 )/2, volts Σ = (v 1 + v 3 )/2 active pow...
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21 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup 3-phase, 4-wire • measures three-phase power. • utilizes all three phases. • the power factor is derived from the following equations: amps Σ = (a 1 + a 2 + a 3 )/3, volts Σ = (v 1 + v 2 + v 3 )/3 active po...
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22 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup 3-volt, 3-amp • measures three-phase power. • utilizes all three phases. • the power factor is derived from the following equations: amps Σ = (a 1 + a 2 + a 3 )/3, volts Σ = (v 1 + v 2 + v 3 )/3 active powe...
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23 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup 3.3.1.2 software configuration to configure the 6530 to coincide with the wiring on the rear panel, complete the following steps utilizing the user menu located on the front panel of the unit. 1. Turn on th...
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24 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup 3.3.3 e xternal s ensor if currents continuously reach above 20 amps, an external sensor must be used. 3.3.3.1 hardware connection in any of the wiring modes, any one of the amp meters may be replaced. The ...
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25 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup 3.3.3.2 software configuration to configure the 6530 external sensor, complete the following steps utilizing the user menu located on the front panel of the unit. 1. Turn on the 6530. See section 3.1 – powe...
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26 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup 3.3.4 a mp s caling the current measurement range can be extended by using a current transformer. Frequency response will be determined by the characteristics of the transformer used. 3.3.4.1 hardware conne...
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27 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup 5. To set the amp scaling for phase 1, press the rms button under a1 and use the buttons in the user menu to adjust the value. 6. To turn phase 1 scaling on, press the peak-cf button under off until on is r...
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28 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup 3.3.5 v olts s caling the voltage measurement range can be extended by using a potential transformer. Frequency response will be determined by the characteristics of the transformer used. 3.3.5.1 hardware c...
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29 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup 3.3.6 p hase s etup once the wiring mode, measurement filter, external sensor, amp scaling and volt scaling have been connected and configured, the unit is ready to be configured for each individual phase. ...
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30 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup a.2. A source now needs to be selected. Press shift button and release, then press source button. Keep repeating until desired source selection is reached. Selections include v1, a1, v2, a2, v3, a3, ext and...
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31 magtrol model 6530 three-phase power analyzer chapter 3 – installation/configuration setup 3.3.7.3 peak hold • clears peak hold/inrush reading. • to enable, press shift button and release, then press peak hold. The display will flash the following, then return to the main menu. Current voltage po...
Page 42: 4. Operating Principles
32 theor y 4. Operating principles 4.1 analog processing 4.1.1 v olts the volts signal is brought in through a precision voltage divider of 2 m and 2.4 k resistors. The gain is 0.0012. This signal is buffered (gain = 1) and passed into a programmable gain section. The gains for the voltage ranges ar...
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33 magtrol model 6530 three-phase power analyzer chapter 4 – operating principles theor y 4.1.2 a mps the amps signal is brought in through a precision shunt of 0.012 ohms. This signal is amplified by 2 and passed into a programmable gain section. The gains for the voltage ranges are given below. E ...
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34 magtrol model 6530 three-phase power analyzer chapter 4 – operating principles theor y 4.1.3 e xternal s hunt the external shunt signal is brought in through a precision voltage divider of 9.1 k and 9.1 k resistors. The gain is 0.50. This signal is buffered and passed into a programmable gain sec...
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35 magtrol model 6530 three-phase power analyzer chapter 4 – operating principles theor y 4.2.1 ac d etails 4.2.1.1 interrupt driven the power analyzer will automatically update its data every 4.469 microseconds by completing the following sequence of events: • the volts input is read and checked fo...
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36 magtrol model 6530 three-phase power analyzer chapter 4 – operating principles theor y 4.2.1.2 main program the main program reads that a sample is ready. Divide the v² register by 256. Store v² in a 24-bit register. (see section 4.2.3 – round-off error). The result is appended to a 32 word circu...
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37 magtrol model 6530 three-phase power analyzer chapter 4 – operating principles theor y 4.2.2 dc d etails 4.2.2.1 interrupt driven the power analyzer will automatically update its data every 4.469 microseconds by completing the following sequence of events: • the volts input is read and checked fo...
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38 magtrol model 6530 three-phase power analyzer chapter 4 – operating principles theor y 4.2.2.2 main program the main program reads that a sample is ready. Divide the v register by 256. Store v in a 24-bit register. The result is appended to a 32 word circular buffer. Add buffer contents and divid...
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39 magtrol model 6530 three-phase power analyzer chapter 4 – operating principles theor y 4.2.3 r ound -o ff e rror the interrupt routine adds 256 56-bit squared readings. This reading is then divided by 256 and put into a 24-bit register. Some error occurs during the move to the 24-bit register. Th...
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40 magtrol model 6530 three-phase power analyzer chapter 4 – operating principles theor y 4.3.2 p eak h old / i nrush c urrent peak hold/inrush current allows the 6530 to store the highest value read in a designated period of time, the designated period of time being the time span since the last pea...
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41 magtrol model 6530 three-phase power analyzer chapter 4 – operating principles theor y 4.3.4 rms see section 4.2.1 – ac details 4.3.5 c rest f actor the crest factor measurement is determined by dividing the peak measurement by the rms measurement. See the following graph for reference. -1.5 -1 -...
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42 opera tion 5. Computer controlled operation using the 6530 with a personal computer (pc) enables the unit to perform at its full capacity. 5.1 about the gpib interface magtrol prefers the gpib (general purpose interface bus)/ieee-488 standard for computer-to- instrument interfacing because: • the...
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43 magtrol model 6530 three-phase power analyzer chapter 5 – computer controlled operation opera tion some pc interfaces can access from one to fifteen 4-bit primary addresses. Other interfaces can access as many as thirty-one 5-bit primary addresses. The 6530 uses the 4-bit format. For setup, compl...
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44 magtrol model 6530 three-phase power analyzer chapter 5 – computer controlled operation opera tion 5.2.2 c ommunication p arameters • no parity • 8 data bits • 1 stop bit 5.2.3 b aud r ate there are several different baud rates to choose from including 300, 600, 1200, 2400, 4800, 9600, 19200 and ...
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45 magtrol model 6530 three-phase power analyzer chapter 5 – computer controlled operation opera tion 5.4 data format • all measurement values are returned as an ascii-string floating point in e notation. • the same data format will be used for both ieee-488 and rs-232 interface. See section 5.6 – 6...
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46 magtrol model 6530 three-phase power analyzer chapter 5 – computer controlled operation opera tion 5.4.2 oe e xample total = 43 characters output string: (1-42) = measurement value float e notation (ansi) data position: ax, vx, wx (where x = requested phase) 5.4.2.1 good response \s\s1.83352e-01,...
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47 magtrol model 6530 three-phase power analyzer chapter 5 – computer controlled operation opera tion 5.6 6530 communication commands ieee-488 address: 0-15 terminator: carriage return followed by a line feed rs-232 baud rate: 300, 600, 1200, 2400, 4800, 9600, 19.2 k, 115.2 k terminator: carriage re...
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48 magtrol model 6530 three-phase power analyzer chapter 5 – computer controlled operation opera tion e d o c d n a m m o c n o i t c n u f n o i t a n a l p x e > r o t a n i m r e t 2 m , 1 m a m c d r o s m r e h t s t e s f o e d o m t n e m e r u s a e m . S e s a h p s p m a . E s a h p t u p ...
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49 magtrol model 6530 three-phase power analyzer chapter 5 – computer controlled operation opera tion e d o c d n a m m o c n o i t c n u f n o i t a n a l p x e > r o t a n i m r e t 2 m , 1 m v r . E g n a r e g a t l o v s t e s . E s a h p t u p n i e h t s e t a c i d n i " 1 m " : e r a 1 m r ...
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50 magtrol model 6530 three-phase power analyzer chapter 5 – computer controlled operation opera tion e d o c d n a m m o c n o i t c n u f n o i t a n a l p x e > r o t a n i m r e t 2 m , 1 m a o p m a s t s e u q e r . E u l a v t n e m e r u s a e m . E s a h p t u p n i e h t s e t a c i d n i ...
Page 61: 6. Calibration
51 maintenance 6. Calibration 6.1 closed-box calibration the 6530 features closed-box calibration. The advantage of closed-box calibration is that the user does not have to disassemble the case or make mechanical adjustments. 6.2 calibration schedule calibrate the 6530: • after any repairs are perfo...
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52 magtrol model 6530 three-phase power analyzer chapter 6 – calibration maintenance 6.4 basic calibration process a n a l o g o u t p u t a ± ± v ± v ± v ±± ± ± a v a ± ext. Sync. Earth ground 20va 50/60hz fuse (5x20mm) caution: double pole fusing 120v ul/csa 250ma 250v sb 240v iec 160ma 250v t rs-...
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53 magtrol model 6530 three-phase power analyzer chapter 6 – calibration maintenance 5. Set volt and amp range by entering the following command codes. Volts => rv0,m2 where m2 = 0 to 3 amps => ra0,m2 where m2 = 0 to 3 6. Set calibrator to 0 volts (dc) and 0 amps (dc). Note: dc is used for zero. 7. ...
Page 64: 7. Optional Features
54 options 7. Optional features 7.1 analog outputs an option to the 6530 is an analog output plug-in module that provides 12 channels of analog output corresponding to volts, amps and watts. Each output is capable of, and calibrated to, ± 10 volts. The user may apply a scale factor to all outputs by...
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55 magtrol model 6530 three-phase power analyzer chapter 7 – optional features options 7.1.3 h ardware c onnection warning: in performing the following procedure, it is assumed that proper esd protection procedures will be implemented. The circuitry involved is very static sensitive. If the analog o...
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56 magtrol model 6530 three-phase power analyzer chapter 7 – optional features options 5. To set amps value, press the rms button under amps and use the buttons in the user menu to adjust the value. 6. To set volts value, press the rms button under volts and use the buttons in the user menu to adjus...
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57 magtrol model 6530 three-phase power analyzer chapter 7 – optional features options e d o c d n a m m o c n o i t c n u f n o i t a n a l p x e > r o t a n i m r e t m m c r o f e d o m n o i t a r b il a c s t e s a / d t u p t u o g o l a n a . S l e n n a h c . N o / f f o e d o m n o i t a r ...
Page 68: 8. Troubleshooting
58 maintenance 8. Troubleshooting m e l b o r p n o s a e r n o i t u l o s . R o r r e o / i s e t a c i d n i y a l p s i d e h t h c t a m t o n s e o d d n a m m o c f o t e s d e m m a r g o r p s ' t i n u . S n o i t c u r t s n i d n a d n a m m o c t c e r r o c e s u . T a m r o f . N o i ...
Page 69: Appendix A: Schematics
59 appendices appendix a: schematics a.1 main board - dsp, ram, flash shorted = boot block write enabled modd = 0 or 1 modc = 0 modb = 0 moda = 1 @ $d00000 mode 1: byte wide boot-strap clkout a0 a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 a11 a12 a13 a14 a15 a16 a17 d0 d23 d22 d21 d20 d19 d18 d17 d16 d15 d14 d13...
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60 magtrol model 6530 power analyzer appendix a: schematics appendices a.2 main board - input/output, gpib, rs-232 rs-232 dtr rs_rxd rs_txd i/o_d0 i/o_d2 i/o_d4 i/o_d6 i/o_d1 i/o_d3 i/o_d5 i/o_d7 i/o_d0 i/o_d1 i/o_d2 i/o_d3 i/o_d4 i/o_d5 i/o_d6 i/o_d7 a0 a1 a2 a3 a4 a[0:17] i/o_d[0:7] i/o_d[0:7] fre...
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61 magtrol model 6530 power analyzer appendix a: schematics appendices a.3 main board - fpga xcs10xl decoupling caps cclk cclk init +3vd dout dout din sco_a3 aa3 cs_usb cs_gpib cs_vfd rd a16 fso_v3 sdo_v3 a17 sdo_a3 fso_v2 sdo_v2 fso_a2 aa2 irqa fso_v1 sdo_v1 sdo_a2 sdo_a1 test_v3 g0_v3 test_v2 g1_v...
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62 magtrol model 6530 power analyzer appendix a: schematics appendices unused gates 2:1 voltage divider - + zero cross detector with hyserisis 4th order chebyshev 500 hz lpf adg719 adg704 u17 u2 u1 scale +/-1.25v full ref_a bias_a +3v +3v +5v 0_a +5va_a +5v +5v dgnd_a +5vd_a fso_a sco_a sdo_a test f...
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63 magtrol model 6530 power analyzer appendix a: schematics appendices a.5 input module - voltage / + ref_v bias_v bias_v +3v sco_v sdo_v fso_v gv_1 gv_0 +5v +5va_v 0_v +5va_v 0_v +5va_v +5v 0_v +5va_v xref_v xref_v 0_v 0_v freq_v 0_v +5va_v g1_v g0_v +5va_v 0_v +5va_v +5vd_v +5v 0_v 0_v +5va_v +5va...
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64 magtrol model 6530 power analyzer appendix a: schematics appendices a.6 key pad.
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65 magtrol model 6530 power analyzer appendix a: schematics appendices a.7 analog output lo ad u11 9711dptd 3.3v + l1 1mh vr1 lm7805ct 12 3 gnd in out sync d ata in +15v c19 0.1 c20 10uf + c17 0.1 c18 10uf + -15v -15v a +15v a + vref – vref r22 10.1k r21 10.0k a gnd +15v a 3 2 1 u7-a + – 6 5 7 u7-b ...
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66 magtrol model 6530 power analyzer appendix a: schematics appendices amps phase 1 volts phase 1 watts phase 1 amps sum j1-1 j1-14 j1-2 j1-15 j1-3 j1-16 j1-10 j1-23 agnd r35 499 r36 499 r17 10k -15va -15va +15va +15va 3 2 3 2 1 1 c22 0.01 d1 bat54s d2 bat54s r37 499 -15va +15va 2 3 1 d3 bat54s r37 ...
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67 magtrol model 6530 power analyzer appendix a: schematics appendices amps phase 2 volts phase 2 watts phase 2 volts sum j1-4 j1-17 j1-5 j1-18 j1-6 j1-19 j1-11 j1-24 agnd r40 499 r39 499 r1 10k -15va -15va +15va +15va 3 2 3 2 1 1 c26 0.01 d5 bat54s d6 bat54s r41 499 -15va +15va 2 3 1 d7 bat54s r42 ...
Page 78
68 magtrol model 6530 power analyzer appendix a: schematics appendices amps phase 3 volts phase 3 watts phase 3 watts sum j1-7 j1-20 j1-8 j1-21 j1-9 j1-22 j1-12 j1-25 agnd r44 499 r43 499 r5 10k -15va -15va +15va +15va 3 2 3 2 1 1 c30 0.01 d9 bat54s d10 bat54s r45 499 -15va +15va 2 3 1 d11 bat54s r4...
Page 79: Glossary
69 appendices glossary following is a list of abbreviations and terms used in this manual. For a list of symbols and abbreviations used on the 6530 display, refer to section 2.3.2 – display guide. Active power ............... The sum of the instantaneous volts input multiplied by the instantaneous a...
Page 80: Index
70 index symbols 1-phase, 2-wire 18 1-phase, 3-wire 19 3-phase, 3-wire 20 3-phase, 4-wire 21 3-volt, 3-amp 22 a abbreviations used 9 active power 17, 69 amp scaling 26 amp scaling setup menu 26 amps. See also current amps gain 33 amps input 10 amps signal 33 analog output 11 hardware connection 55 s...
Page 81
71 magtrol model 6530 three-phase power analyzer index inrush 69 inrush current 40 interrupt driven ac 35 dc 37 l line voltage 13 m main menu 14 main program ac 36 dc 38 measurement filter 23 measurement methods 41 measurement modes 39–41 menus amp scaling setup menu 26 analog output setup menu 55 c...
Page 82: Magtrol Limited Warranty
Magtrol, inc. Warrants its products to be free from defects in material and workmanship under normal use and service for a period of 24 months from the date of shipment. Software is warranted to operate in accordance with its programmed instructions on appropriate magtrol instruments. This warranty ...
Page 83
Www.Magtrol.Com testing, measurement and control of torque-speed-power • load-force-weight • tension • displacement magtrol inc 70 gardenville parkway buffalo, new york 14224 usa phone: +1 716 668 5555 fax: +1 716 668 8705 e-mail: magtrol@magtrol.Com magtrol sa route de moncor 4b 1701 fribourg, swit...