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Instruction Manual AM 503B & AM 5030 AC/DC Current

1. Alternator To Ground The waveform in Figure 3 7 a shows the three phase ripple frequency The average charge current is approximately 27 A with a minimum peak of approxi mately 23 A and a maximum peak of approximately 31 A The waveform shows a continuous cycle with no dropouts so the alternator circuit appears to be functioning properly A single phase diode failure normally appears as an extreme drop in charge current every third cycle as shown in Figure 3 7 b 40A a Normal Waveform Figure 3 7 Charge Current Waveforms 3 10 b Waveform with One Bad Phase AM 503B amp AM 5030 Amplifier Instruction Manual Application Notes Inductance Measurements Low Impedance Pulse Sources You can use the AM 503B and AM 5030 to measure inductance of coils Two different methods can be used one for low impedance pulse sources and another for high impedance pulse sources of known value Figure 3 8 shows a measurement setup using a constant voltage pulse generator of extremely low output impedance The inductor is connected across the output terminals of the pulse source The current probe is attached to one of the source leads and the current ramp is measured The inductance is effectively defined by the slope of the current ramp shown in Figure 3 9 and is mathematically expressed by the
2. OVE PROBE FROM CIRCUIT AND CLOSE am v v OSCILLOSCOPE AT 10mV DIVISION J gt ADDRESS SW LIMIT gt COUPLINGL REF ac GPIB TERMINATOR le A Figure 2 4 The AM 503B and AM 5030 Front Panel AM 503B amp AM 5030 Amplifier Instruction Manual The two indicator lights PROBE OPEN and OVERLOAD give you local status information The two indicator lights SRQ and REMOTE give you remote status information AM 5030 only The PROBE DEGAUSS AUTOBALANCE button removes residual magnetism from the attached current probe The probe must be removed from the test circuit and locked The CURRENT DIVISION buttons change the AM 503B and AM 5030 scale factor The COUPLING button selects AC or DC probe coupling or a zero current reference as indicated by the lights The current probes connect to the 503B and AM 5030 at the INPUT connector 2 7 Control Summary AM 503B and AM 5030 Controls OUTPUT DC LEVEL Control PROBE OPEN Indicator OVERLOAD Indicator A PROBE DEGAUSS AUTOBALANCE Button 2 8 These front panel controls and indicators are common to both the AM 503B and AM 5030 current probe amplifiers The OUTPUT DC LEVEL knob adjusts the DC offset that appears at the Amplifier OUTPUT connector The OUTPUT DC LEVEL knob adjusts the
3. 6 5 Table 6 4 Required Test Equipment 6 7 Table 6 5 Settings for DC Offset Adjustment 6 9 Table 6 6 Error Codes Requiring DC Offset Adjustment 6 9 Table 6 7 Settings for Transient Response and Gain Adjustments 6 11 Table 6 8 Required Test Equipment 6 13 Table 6 9 Settings for DC Offset Adjustment 6 14 Table 6 10 Error Codes Requiring DC Offset Adjustment 6 15 Table 6 11 Equipment Settings for DC Gain Accuracy 6 16 Table 6 12 Equipment Settings for Transient Response 6 18 AM 503B amp AM 5030 Amplifier Instruction Manual if General Safety Summary Injury Precautions Ground the Product Do Not Operate Without Covers Do Not Operate in Wet Damp Conditions Do Not Operate in Explosive Atmosphere Avoid Exposed Circuitry Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it Only qualified personnel should perform service procedures While using this product you may need to access other parts of the system Read the General Safety Summary in other system manuals for warnings and cautions related to operating the system This product is grounded through the grounding conductor of the power cord To avoid electric shock the grounding conductor must be connected to earth ground B
4. Glossary and Index _ E Glossary amp second product The unit of measure defining the maximum amount of pulsed current that can be measured before the probe core becomes saturated The amp second rating applies only to measurement values between the maximum continuous and maximum pulse current ratings of the probe The amp second rating is equal to the peak current multiplied by the pulse width at the 50 point auto balance A process that removes unwanted DC offsets from the AM 503B and AM 5030 circuitry to ensure maximum measurement accuracy This process is performed during the probe degauss routine bucking current Current fed back by the AM 503B and AM 5030 to the current probe during DC and low frequency AC measurements Bucking current nulls most of the magnetic field in the probe core allowing linear DC and AC measurements simultaneously conventional current flow The flow of the positive charge in a conductor Conventional current flow is from positive to negative The arrows on current probes point in the direction of conventional current flow Conventional current flow is in the opposite direction of electron current flow degauss A process of eliminating residual magnetism from the probe core by feeding a decaying sine wave into the core The degaussing process should be performed before clamping the probe around a conductor whenever the probe b
5. 20 220 0729 00 21 210 0406 00 8 4 Qty 12345 Name amp Description SHIELD ELEC SIDE ASSEMBLY CA ASSY SPELEC 20 28 AWG 6 0 L FLAT AM5030 ONLY CA ASSY SPELEC 20 28 AWG 6 0 L FLAT AM503B ONLY CABLE ASSY RF 50 OHM COAX 6 25L 9 2 PELTOLA X PELTOLA IC MEMORY CMOS EPROM 32K X 8 PRGM 156 3503 00 27C256 DIP28 6 GPIB ROM 200NS AM5030 ONLY IC DIGITAL LSTTL TRANSCEIVER OCTAL IEEE 488GPIB BUS MGT AM5030 ONLY IC DIGITAL LSTTL TRANSCEIVER OCTAL IEEE 488GPIB BUS XCVR AM5030 ONLY IC PROCESSOR CMOS MICROCOMPUTER 8 BIT 16MHZ 32K X 8 OTP EPROM 512 X 8 RAM AM5030 ONLY IC PROCESSOR CMOS MICROCOMPUTER 8 BIT 16MHZ 32K X 8 OTP EPROM 512 X 8 RAM AM5030 ONLY IC PROCESSOR CMOS MICROCOMPUTER 8 BIT 16MHZ 32K X 8 OTP EPROM 512 X 8 RAM AM503B ONLY IC PROCESSOR CMOS MICROCOMPUTER 8 16 2 32 X 8 OTP EPROM 512 X 8 RAM AM503B AND AM5030 BATTERY DRY 1 5V SILVER OXIDE 600MAH 2 3 AA SIZE W PC TABS FUSE WIRE LEAD 3 0A 125V 5 SECONDS SCREW MACHINE 4 40 X 0 25 FLH 100 DEG STL SPRING FLAT 1 48 L X 0 125 W CU BE FR SECT PLUG IN TOP SCREW MACHINE 4 40 X 0 25 FLH 100 DEG STL LOCKOUT PLUG IN PLASTIC AM5030 ONLY NUT PLAIN HEX 4 40 X 0 188 BRS CD PL SUPPORT FRAME REAR SCREW TPG TR 6 32 X 0 437 TAPTITE PNH STL SCR ASSEM WSHR 4 40 X 0 250 PNH STL TORXT10 AM5030 ONLY SUPPORT PLUG IN NUT BLOCK 4 40 X 0 188 BRS NP AM5030 ONLY NUT PLAIN HEX 4 40 X 0 188 BRS CD P
6. coupling modes 3 3 CT 4 high current adapter 1 4 3 7 current limitations amp second product 3 4 maximum continuous 3 4 maximum pulsed 3 4 current probe calibration 6 1 customer support 1 1 D DC coupling 2 10 3 3 DC LEVEL control 2 4 2 5 2 8 3 3 DCLEVel Command 2 23 DEGAuss Command 2 23 degauss function 2 2 2 8 Glossary 1 differential current 3 2 disassembly front panel 7 4 knobs 7 4 precautions 7 3 release lever 7 4 side covers 7 4 E electron current Glossary 1 See also conventional current error codes 3 17 error 266 3 19 error 357 3 19 LO 3 19 ERRor Command 2 24 EVent Command 2 24 EXit Command 2 24 extending the current range of the probes 3 5 F flux Glossary 1 FPLock Command 2 25 frequency derating 3 4 front panel controls 2 7 G gain adjustment See trim adjust Gauss Glossary 1 GPIB Configurations 2 14 Connection rules 2 14 Index 2 GPIB Address 2 14 GPIB ADDRESS button 2 12 GPIB ADDRESS indicator 2 12 GPIB Connector 2 13 GPIB Operation 2 13 GPIB Parameters 2 14 GPIB terminator 2 12 2 15 H Hall device Glossary 2 Hall effect Glossary 2 HELp Command 2 25 ID Command 2 26 IEEE Std 488 1 1987 2 13 increasing bucking current 3 6 increasing probe sensitivity 3 7 indicator 20MHz BW LIMIT 2 10 GPIB ADDRESS 2 12 OVERLOAD 2 8 PROBE DEGAUSS AUTOBALANCE 2 9 PROBE OPEN 2 8 REMOTE 2 12 SRQ 2 12 inductance mea
7. AM 503B amp AM 5030 Amplifier Instruction Manual 5 23 Performance Verification with an A6302 or A6302XL 5 24 For example you might have obtained values of 50 mV for M and 48 mV for M If you are using an Amplifier setting of 10 mA division you can compute ln as i 50 0 103 48x10 3 m 0 01 X 10 10 98 mA Verify that the measured current Zm is within 3 of the test current by computing Error as follows Lo A 7 8100 Error For example using a test current J of 100 mA and a measured current Im of 98 mA the Error would be 98 100 Error 100 x 100 2 AM 503B amp AM 5030 Amplifier Instruction Manual Performance Verification with an A6302 or A6302XL Table 5 12 DC Gain Accuracy Test Worksheet for A6302 A6302XL Turns of Current AM 503B and T Loop Passing AM 5030 Current Source Test Current Im Error Through Probe Current Division Output M Note Note 7 Im 20 5 mA 20 10 mA 20 20 mA 20 50 mA 20 100 mA 20 200 mA 20 500 mA 20 1A 20 2A 20 5A ee TL X current division Note B I Error x 100 t AM 503B amp AM 5030 Amplifier Instruction Manual 5 25 Performance Verification with an A6302 or A6302XL 5 26 503B amp 5030 Amplifier Instruction Manual E NNNM Performance Verification with A6303 A6303XL
8. 2 12 susceptibility Glossary 2 T termination resistor 1 7 TEST Command 2 31 troubleshooting 3 19 U UNIts Command 2 31 V voltage selector 1 4 Index 3 Index Index 4 AM 503B amp AM 5030 Amplifier Instruction Manual
9. AM 5030 Amplifier Instruction Manual Application Notes p Pulse Generator Resistance Current Flow i Inductance Current Probe en Figure 3 10 Measuring Inductance with a High Impedance Source Current Flow i 100 63 2 36 8 0 lt 7 gt PRET Figure 3 11 High Impedance Source Current Ramp AM 503B amp AM 5030 Amplifier Instruction Manual Time t 3 13 Application Notes Continuity Test of Multiple Conductor Cable Single conductors in a multiconductor cable can be tested with the AM 503B and AM 5030 To check a conductor clamp the current probe around the cable bundle and check for a specific known current signal If there is no current or the current is abnormally low then the conductor has a continuity problem If the current is abnormally high then the conductor may have a short to ground Measuring Inductor Turns Count 3 14 To obtain an approximate turns count of an inductor connect the inductor to a current limited source as shown in Figure 3 12 Measure the input current on one of the inductor leads then clamp the current probe around the inductor and note the current value The number of turns is equal to the ratio of coil current to input current The accuracy of this method is limited by the current measurement accuracy The following method allows more precise turns measurement For a more precise
10. AM 503B amp AM 5030 Amplifier Instruction Manual 2 15 GPIB Operation 2 16 AM 503B amp AM 5030 Amplifier Instruction Manual eee Functional Command Groups NOTE This material applies only to the AM 5030 Programmable Amplifier The AM 503B does not support a GPIB interface The AM 5030 GPIB interface commands fall into four groups m Front panel commands m GPIB Status commands m Amplifier Status commands W Probe Status commands Command names show both upper and lower case characters Only the upper case characters are required You can abbreviate commands by omitting lower case characters starting from the end For example you can enter the ALLEve command as ALLEVE ALLEV or ALLE The AM 5030 is not case sensitive You can use lower case letters anyplace in command names or arguments alLeVe AllEv or alle are valid Front Panel Commands The commands listed in Table 2 1 are used to control or duplicate the front panel controls and indicators of the AM 5030 Table 2 1 Front Panel Commands Command Name Description AMPS Sets output resolution BWLIMit Sets or resets bandwidth limiting COUpling Sets input coupling DCLEVel Adjusts output DC offset reference level DEGAuss Starts the degauss autobalance sequence FPLock Disables and enables front panel controls OVerload Returns the state of the overload indicator UNIts Returns units of AM 5030 output AM 503B amp AM 5030 Amplifier Instructi
11. Clamp the current probe around the calibration fixture Verify that the arrow shaped indicator on the probe points away from the pulse source 4 Using the measurement capability of the oscilloscope measure the rise time of the displayed pulse from 10 to 90 amplitude AM 503B amp AM 5030 Amplifier Instruction Manual Performance Verification with an A6312 5 Calculate the rise time of the probe f probe using the formula below t probe i t measured t system The measured rise time 1 measured is the value calculated in step 4 The system rise time 1 system is the rise time of the displayed signal when output of the pulse generator is connected directly to the oscilloscope input The current probe and amplifier are excluded 6 Verify that the probe rise time is less than the warranted specification Refer to Table 4 1 on page 4 2 DC Gain Accuracy This procedure tests the DC gain accuracy of the A6312 Current Probes In this test you compare the voltage output of the Amplifier to a reference input Current Loop for DC Gain You will need to construct a simple current loop in order to complete the DC Accuracy Check gain accuracy tests WARNING Magnetic fields are produced that may cause a malfunction in heart pacemakers or damage to sensitive equipment Construct the loop using a cylindrical form approximately 3 inches in diameter wind exactly 20 turns of 27 coated wire NOTE En
12. THD D FLAT 29 337 3927 01 1 SHIELD ELEC AS W CONNECTOR amp FLEX BOARD 80009 337392701 30 214 3143 00 1 SPRING HLEXT 0 125 OD X 0 545 L XLOOP 8X345 ORDER BY DESC 31 105 0866 00 12 LATCH RETAINING 004805 ORDER BY DESC 32 105 0865 00 1 BAR LATCH RLSE 0JROS ORDER BY DESC 33 366 0733 00 3 KNOB KEYCAP UNLIT OKBZ5 ORDER BY DESC 34 366 0732 00 3 KNOB KEYCAP LIGHTED OKBZ5 ORDER BY DESC AM5030 ONLY 366 0732 00 2 KNOB KEYCAP LIGHTED OKBZ5 ORDER BY DESC AM503B ONLY 35 386 0050 01 8010001 8010019 1 LABEL 80009 386005001 AM5030 ONLY 614 0926 00 010020 1 FR PANEL ASSY W ID LABEL 80009 614092600 AM5030 ONLY 614 0924 00 1 FR PANEL ASSY W ID LABEL 80009 614092400 AM503B ONLY 36 366 1851 02 1 KNOB LATCH IVORY GRAY 0JROS ORDER BY DESC POLYCARBONATE 1 09 X 0 250 37 366 2111 00 1 KNOB SMALL FLUTED TK1163 ORDER BY DESC 38 384 1695 00 1 SHAFT EXTENSION 1 550 L 0 264 DIA DELRIN 80009 384169500 AM 503B amp AM 5030 Amplifier Instruction Manual 8 5 AM 503B amp AM 5030 Replaceable Parts Fig amp Index Tektronix Serial No Mfr No Part No Effective Dscont Qty 12345 Name amp Description Code Mfr Part No 8 2 STANDARD ACCESSORIES 1 011 0049 01 1 TERMN COAXIAL 50 OHM 2W BNC 64537 T132DS 2 012 0057 01 1 CA ASSY RF COAXIAL RFD 50 OHM 43 L 80009 012005701 BNC MALE STR BOTH ENDS W STRAIN RELIEF BOOT BOTH ENDS 070 8766 04 1 MANUAL TECH INSTR AM503B AM5030 80009 070876604 07
13. The test procedures in this section check for proper performance of the AM 503B and AM 5030 with an A6303 or A6303XL current probe Tolerances that are specified in these procedures apply to the Amplifier and current probe and do not include test equipment error No probe or Amplifier adjustments are required during these test procedures Should any tests fail refer to the troubleshooting section for troubleshooting recommendations Read page 5 1 before starting these procedures Also read each procedure through completely before starting to ensure proper completion Required Test Equipment To perform the acceptance tests in this section you will need the test equipment listed in Table 5 13 The test equipment must meet or exceed the specifications listed The test procedures may need to be modified if the recommended equipment is not used Table 5 13 Required Test Equipment Recommended Qty Item Description Equipment 1 Oscilloscope 350 MHz bandwidth TDS 520B 1 Current Probe AM503B or AM5030 Amplifier 1 Leveled Sine Wave 3 MHz to 15 MHz Wavetek 9100 with Generator Option 250 or SG 503 equivalent 1 Calibration Generator 1 MHz square wave rise time 1 ns Wavetek 9100 with 1 Vp p into 50 Q Option 250 or PG 506A equivalent 1 Digital Multimeter 0 25 31 digit resolution DM2510 G 1 Current Source 0 3 accuracy 0 to 2 A Fluke 5700A or Wavetek 9100 1 Calibration Fixture 50 Q BNC Connector 015 0601 50 1 Current Loop
14. displayed waveform relative to ground After setting a zero current reference do not use the oscilloscope vertical position to move the waveform up and down on the display use the Amplifier OUTPUT DC LEVEL knob instead As you adjust the OUTPUT DC LEVEL knob the display shows you the output level in divisions When you stop moving the OUTPUT DC LEVEL knob the display reverts to show current per division The PROBE DEGAUSS AUTOBALANCE button will change the output DC level setting if the Amplifier coupling is set to REF In this case only the output DC level setting will be reset to ground otherwise the DC level setting will remain at its previous setting NOTE To maintain measurement accuracy position the signal with the AM 503B and AM 5030 OUTPUT DC LEVEL knob Do not adjust the vertical position control of your oscilloscope once you have established a zero current reference When lit this indicator informs you that the current probe is unlocked You must have the probe slide locked in order to degauss the probe or to accurately measure current When lit this indicator informs you that the measurement you are taking exceeds the continuous amplitude limit of the AM 503B and AM 5030 The detection circuits only detect low frequency 10 kHz and DC overloads Since overloads can magnetize the probe you should always degauss the probe after an overload WARNING To avoid personal injury or equipment damage do not exceed t
15. 250 1 Calibration Generator Square wave with a rise time lt 35 ns AVTECH 5 A into 50 Q AVR 3 PW C P TEK2 1 Current Loop 250 turns 067 0240 00 1 Termination 50 0 1 0 5 W 011 0129 00 2 BNC Cable 50 1 05 m 42 in long 012 0057 01 3 BNC to Dual 103 0090 00 Banana Adapter 1 AVTECH Electrosystems Ltd P O Box 265 Ogdensburg NY 13669 0265 315 472 5270 or 800 265 6681 AM 503B amp AM 5030 Amplifier Instruction Manual 5 37 Performance Verification an A6304XL Rise Time Equipment Connections 5 38 This procedure measures the rise time of the A6304XL In this test you directly measure the rise time of a step input Refer to Figure 5 10 when making equipment connections Amplifier in T Calibration Series Power Generator Test Oscilloscope Module Current Probe 50 Q Input Output Loop Figure 5 10 Rise Time Test Setup for the A6304XL 1 Using a BNC cable connect the Amplifier OUTPUT to a 50 Q oscilloscope input If the input impedance of your oscilloscope is 1 MQ connect a 50 2 feedthrough termination at the oscilloscope input Do not connect the termination at the Amplifier output 2 Connect the probe to the Amplifier 3 Connect the current loop calibration fixture to the calibration generator 50 Q fast rise output NOTE If your oscilloscope cannot trigger on the pulse use another BNC cable to conne
16. 50 turns 21 AWG coated wire Refer to page 5 32 1 Termination 50 Q 0 1 0 5 W 011 0129 00 AM 503B amp AM 5030 Amplifier Instruction Manual 5 27 Performance Verification with an A6303 or A6303XL Bandwidth Equipment Connections 5 28 Equipment Settings Table 5 13 Required Test Equipment Cont Recommended Qty Item Description Equipment 1 BNC Cable 50 1 05 m 42 in long 012 0057 01 1 BNC to Dual 103 0090 00 Banana Adapter This procedure tests the bandwidth of the A6303 and A6303XL Current Probes In this test you measure a signal at a relatively low frequency and again at the rated bandwidth of the probe The two measurements are compared to check that the signal amplitude does not fall below 3 dB at the probe bandwidth Refer to Figure 5 7 when making equipment connections n Leveled Amplifier in T Sine Wave Series Power Generator Test Oscilloscope Module Current 50 oscilloscope input or add 50 Q termination here if oscilloscope has only high impedance input Calibration Fixture Figure 5 7 Bandwidth Test Setup for an A6303 A6303XL 1 Using a 50 BNC cable connect the Amplifier OUTPUT to a 50 oscilloscope input If the input impedance of your oscilloscope is 1 MQ connect 50 feedthrough termination at the oscilloscope input Do not connect the termination a
17. Bandwidth typical Output DC Level Adjust ment Range typical lt 7 Hz 3 dB 10 divisions lt 7 Hz 3 dB 10 divisions lt 7 Hz 3 dB 10 divisions lt 7 Hz 3 dB 10 divisions lt 7 Hz 3 dB 10 divisions lt 7 Hz 3 dB 10 divisions Output Dynamic Range typical Including Output DC Level Setting Displayed Noise typical 4 2 10 divisions 100 mV lt 250 pAnus Limit measure ment bandwidth to 100 MHz 10 divisions 100 mV lt 250 HARus Limit measure ment bandwidth to 100 MHz 10 divisions 100 mV lt 2 5 Limit measure ment bandwidth to 100 MHz 10 divisions 100 mV lt 250 5 Limit measure ment bandwidth to 100 MHz 10 divisions 100 mV lt 2 5 mAR 5 Limit measure ment bandwidth to 100 MHz 10 divisions 100 mV 0 25 ARMS Limit measure ment bandwidth to 20 MHz AM 503B amp AM 5030 Amplifier Instruction Manual Specifications Table 4 2 Nominal and Typical AM 503B and AM 5030 Characteristics Cont Parameter Bandwidth Limit 3 dB typical 20 MHz 4 MHz Installed Probe A6302XL 20 MHz 12 MHz 14 MHz 4 MHz 3 MHz 2 MHz A6303XL A6304XL 9 MHz 2 MHz 2 MHz 10 kHz Signal Delay typical with provided 50 Q cable approximately 30 ns approximately approximately approximately 30 ns 55 ns 60 ns Table 4 3 AM 503B and AM 5030 Mechanical
18. Characteristics approximately approximately 105 ns 105 ns Parameter nominal Characteristic Length 298 mm 11 7 in Height 127 mm 5 0 in Width 67 mm 2 63 in Weight 2 kg 44 Ib AM 503B amp AM 5030 Amplifier Instruction Manual 4 3 Environmental Characteristics The environmental characteristics in Table 4 4 are warranted performance specifications Unlike the warranted characteristics in Table 4 1 the environ mental characteristics are type tested therefore there are no performance verification procedures provided to test these characteristics Table 4 4 AM 503B and AM 5030 Environmental Characteristics Parameter Characteristic AmbentTempratre Operating 0 C to 450 C Nonoperating 55 C to 75 C Humidity Operating 50 C to 95 R H Nonoperating 60 C to 95 R H Altitude Operating 4 570 m 15 000 ft maximum Nonoperating 15 200 m 50 000 ft maximum Random Vibration Operating 0 31 gnus 5 Hz to 500 Hz 10 minutes each axis Nonoperating 2 46 Gams 5 Hz to 500 Hz 10 minutes each axis Shock 30 g 11 ms duration half sine pulses Bench Handling 30 g 11 ms duration half sine pulses Topple Test Transit Test Packaged P roduct Electro Magnetic Compliance 30 g 11 ms duration half sine pulses 38 1 cm 15 in free fall drop height 91 kg 200 Ib compressive load 32 mm 0 125 in displacement 30 minute vibration test 1 33 gnus 1 hour each axis random vi
19. DC coupling If necessary use a 50 Q termination at the oscilloscope input 5 If no error codes are displayed after degauss autobalance routine completes no offset adjustment is necessary If any of the error codes listed in Table 6 3 are displayed continue with the procedure AM 503B amp AM 5030 Amplifier Instruction Manual A6312 A6302 and A6302XL Adjustment Table 6 3 Error Codes Requiring DC Offset Adjustment Error Code Meaning 580 Unable to complete negative offset adjustment 581 Unable to complete positive offset adjustment 6 Press and hold the 20 MHz BW LIMIT button and while holding it press the PROBE DEGAUSS AUTOBALANCE button This sets the front panel display to 00 and puts the AM 503B and AM 5030 into an internal test mode 7 Press the CURRENT DIVISION button until the front panel display reads 52 8 Press and release the 20 MHz BW LIMIT button The Amplifier will degauss itself wait until the DEGAUSS light goes out 9 Adjust the DC Offset control so that the oscilloscope trace is on the center graticule line zero offset 1 division 10 Press and release the 20 MHz BW LIMIT button then press and release the COUPLING button This exits the AM 503B and AM 5030 test mode AM 503B amp AM 5030 Amplifier Instruction Manual 6 5 A6312 A6302 and A6302XL Adjustment 6 6 AM 503B amp AM 5030 Amplifier Instruction Manual A6303 and A6303XL Adjustments Each of the follo
20. Equipment Connections 1 Connect the Amplifier OUTPUT to a 50 oscilloscope input using a 50 BNC cable If the input impedance of your oscilloscope is 1 connect 50 Q feedthrough termination to the oscilloscope input Do not connect the termination at the Amplifier output 2 Connect the current probe to the Amplifier INPUT connector 3 Do not clamp the current probe around any conductor but make sure the jaws are locked shut 6 8 AM 503B amp AM 5030 Amplifier Instruction Manual A6303 and A6303XL Adjustments Equipment Settings or verify the equipment settings in Table 6 5 Table 6 5 Settings for DC Offset Adjustment AM 503B and AM 5030 Coupling DC BW Limit Off full bandwidth Current division 10 mA division Oscilloscope Vertical Gain 10 mV division Time Base 1 ms division Auto triggered Input Coupling Ground Procedure 1 Move the oscilloscope trace to the center horizontal graticule line using the vertical position control 2 Change the oscilloscope input coupling to DC 3 Do not clamp the current probe around any conductor but make sure the jaws are locked shut 4 Press the Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalance routine to complete before proceeding The routine is complete when the indicator light turns off NOTE The Amplifier front panel will display error code 266 after the degauss autobalance routine completes if th
21. GPIB address If an instrument failure occurs the display will flash an error code number The Amplifier displays error code 266 when the Amplifier output is not properly terminated into 50 Q load Make sure your Amplifier OUTPUT is connected to an oscilloscope input using a 50 BNC cable and that the oscilloscope input is set to 50 Q impedance See Figure 1 1 on page 1 2 for proper cabling If your oscilloscope does not have 50 2 impedance settings for inputs you can place a 50 Q feedthrough termination on the oscilloscope input and connect the Amplifier output cable to the termination Do not place the feedthrough termination at the Amplifier end of the BNC connecting cable When the internal backup battery becomes weak the CURRENT DIV display will momentarily flash the characters LO when the instrument is turned on For battery replacement instructions refer to Battery Replacement on page 7 10 NOTE If a battery low condition occurs calibration values in NVRAM may be lost which can cause the the AM 503B and AM 5030 to fail to meet specifica tions If an error code other than 266 or LO appears consult Table 3 3 for an explana tion of the error If the error is a hardware failure turn the instrument off and then on again If the error condition persists have the instrument serviced by a qualified service person AM 503B amp AM 5030 Amplifier Instruction Manual 3 17 Error Codes Table 3 3 AM 503B and A
22. Probe Output Loop Make or verify the equipment settings in Table 6 12 Table 6 12 Equipment Settings for Transient Response Oscilloscope Vertical input impedance 500 Vertical gain 10 mV division Time base 100 us division Record length 500 Coupling DC Offset 0 V mid scale Trigger type Edge Trigger mode Normal Trigger position 50 Acquisition mode Average Number of waveforms to average 8 Measurement type Rise Time AM 503B amp AM 5030 Amplifier Instruction Manual A6304XL Adjustments Table 6 12 Equipment Settings for Transient Response Cont Calibration Generator Pulse Width 250 us Pulse Repetition Frequency 20 Hz Pulse Amplitude 5 A peak 503B and AM 5030 Coupling DC BW Limit Off Current division 1 A division Procedure 1 Move the oscilloscope trace to one graticule line from the bottom of the screen 2 Setthe oscilloscope input coupling to DC 3 Do not clamp the current probe around any conductor but make sure the jaws are locked shut 4 Remove the probe access plugs for 1 us 10 us and DC Gain 5 Press the Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalance routine to complete before proceeding The routine is complete when the indicator light turns off NOTE The Amplifier front panel will display error code 266 after the degauss autobalance routine completes if the Amplifier is not properly terminated
23. Query Form Syntax Arguments Examples Initializes the probe degauss autobalance sequence DEGAuss DEGAuss 0 DEGAuss DEGAuss 2 If the argument is omitted or is zero the command operates like the front panel PROBE DEGAUSS AUTOBALANCE button it recalibrates gain only if a significant temperature change has occurred since the last calibration An argument of 1 forces a gain calibration even if it would normally be bypassed because of insufficient temperature change since the last calibration An argument of 2 performs a gain calibration only without balancing the Hall device This is used when adjusting the A6302 and A6302XL current probe DC offset adjustment See page 6 4 DEGA operates just like pressing the PROBE DEGAUSS AUTOBALANCE button AM 503B amp AM 5030 Amplifier Instruction Manual 2 23 Commands ERRor Query Only Syntax Returns Examples EVent Query Only Syntax Returns Examples EXit Syntax 2 24 Returns the error or event code for the most recent event reported by serial poll or for the highest priority condition pending ERRor and EVent function identically ERRor The most recent error event code ERR might return 266 as the most recent error code Returns the error or event code for the most recent event reported by serial poll or for the highest priority condition pending EVent and ERRor function identically EVent The most recent error eve
24. Refer to page 5 21 1 Termination 50 Q 0 1 0 5 W 011 0129 00 1 BNC Cable 50 1 05 m 42 in long 012 0057 01 1 BNC to Dual 103 0090 00 Banana Adapter AM 503B amp AM 5030 Amplifier Instruction Manual Performance Verification with an A6312 Bandwidth Equipment Connections Equipment Settings This procedure tests the bandwidth of the A6312 Current Probe In this test you measure a signal at a relatively low frequency and again at the rated bandwidth of the probe The two measurements are compared to verify that the signal amplitude does not fall below 3 dB at the probe bandwidth Refer to Figure 5 1 when making equipment connections Amplifier in T i Series Power ine Wave Module Generator Current Probe Output 50 Q oscilloscope input or add 50 Q termination here if oscilloscope has only high impedance input Calibration Fixture Figure 5 1 Bandwidth Test Setup for A6312 1 Using a 50 BNC cable connect the Amplifier OUTPUT to a 50 Q oscilloscope input If the input impedance of your oscilloscope is 1 MQ connect a 50 feedthrough termination at the oscilloscope input Do not connect the termination at the Amplifier output 2 Connect the current probe to the Amplifier INPUT 3 Connect the current loop calibration fixture to the output of the leveled sine wave generator Make or verify the equipment settings in T
25. TM 5000 series power module that powers one or more TM 500 series instruments The Power Module operates on either 110 or 220 VAC 50 or 60 Hz The AM 5030 operates in a Tektronix TM 5000 series power module that powers one or more TM 5000 series instruments while providing GPIB support The Power Module operates on either 110 or 220 VAC 50 or 60 Hz An oscilloscope displays the output from the current measuring system A 50 cable is included to connect the Amplifier to the oscilloscope input channel If the oscilloscope does not have an input that can be set to 50 Q impedance you need a feedthrough 50 2 termination This termination is included as a standard accessory with your AM 503B and AM 5030 Current Probe Amplifier These accessories are shipped with either the AM 503B or AM 5030 m 50 Q coaxial cable m 50 Q feedthrough termination m Instruction Manual m Reference card If you ordered an AM 5035 system you will have received these items 503 m Current Probe specific probe type depends on option ordered with the Amplifier TM 502A Power Module m Toolbox W AC Power cord You can order the following optional accessories for the AM 503B and AM 5030 Current Probe Amplifiers Refer to the Replaceable Parts List on page 8 6 for Tektronix part numbers to use in ordering these accessories AM 503B amp AM 5030 Amplifier Instruction Manual 1 3 Getting Started m One turn 50 Q current loop The cur
26. a Probe with an Unpowered Conductor in the Jaws 3 1 Bandwidth Limiting 3 2 Measuring Differential Current 3 2 AC and DC Coupling 22 88 e nn 3 3 Maximum Current Limits 1 3 4 Extending Current Range 3 5 Increasing Sensitivity roii ern Le MESE PERS 3 7 Application 3 9 Automobile Charging Systems 3 9 Inductance Measurements 1 3 11 Continuity Test of Multiple Conductor Cable 3 14 Measuring Inductor Turns Count 3 14 Error Codes ss pu RECEN des ne UR 3 17 Troubleshooting 2 02 x er CERE C S 3 19 Specifications Specifications e nep e IE v 4 1 Warranted Specifications 42 Nominal and Typical Characteristics 42 Environmental Characteristics 4 4 Performance Verification Performance Verification Setup 5 1 Test Procedure Conditions 5 1 Equipment Preparation 5 1 Warran
27. as shown in Figure 5 11 AM 503B amp AM 5030 Amplifier Instruction Manual Performance Verification an A6304XL DMM 0 20 BNC to Dual Banana Adapter ac 50 OTermination 50 O Coaxial Cable Amplifier in T Series Power Module Current Source Current Flow Figure 5 11 DC Gain Accuracy Test Setup for the A6304XL Equipment Settings A Procedure Make or check the equipment settings in Table 5 21 Table 5 21 Equipment Settings for DC Gain Accuracy Digital Multimeter Measurement DC volts Current Source Output off AM 503B and AM 5030 Coupling DC BW Limit On Current division 500 mA division Probe Trim 000 WARNING This test produces intense magnetic fields that may cause malfunc tions in a normally operating heart pacemaker or damage sensitive equipment Personnel fitted with pacemakers should not perform this test and should stay at least 10 feet from the current loop while the test is being conducted 1 Do not clamp the current probe around any conductor but make sure the jaws are locked shut 2 Press the Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalance routine to complete before proceeding The routine is complete when the indicator light turns off AM 503B amp AM 5030 Amplifier Instruction Manual 5 41 Performance Verification an
28. buttons together let you define the AM 5030 GPIB terminator The terminator may be set to EOI only or EOI followed by LF To set the GPIB terminator press and hold the GPIB AD DRESS button and also press and hold the 20 MHz BW LIMIT button While holding them down use the amp and gt buttons to adjust the setting that is displayed in the CURRENT DIVISION display The display shows EOI if the terminator is EOI only and LF if the terminator is EOI followed by LF AM 503B amp AM 5030 Amplifier Instruction Manual GPIB Operation NOTE This material applies only to the AM 5030 Programmable Amplifier The AM 503B does not support a GPIB interface You can use a computer to control the AM 5030 and make measurements With an oscilloscope that also can be programmed the computer and AM 5030 can form a complete automated measurement system Your computer also known as the controller must be capable of operating on a GPIB bus that conforms to IEEE Std 488 1 1987 GPIB cards are available to provide this capability for personal computers The TM 5000 Series Power Module has a 24 pin GPIB connector on its rear panel as shown in Figure 2 5 This connector has a D type shell and conforms to IEEE Std 488 1 1987 Attach an IEEE Std 488 1 1987 GPIB cable see Optional Accessories in the Replaceable Mechanical Parts section between this connector and your controller Figure 2 5 also shows how cables can be stacked together You
29. can stack a second cable on either the TM 5000 Series Power Module connector or the controller connector to similarly connect your oscilloscope Figure 2 5 Stacked GPIB Connectors AM 503B amp AM 5030 Amplifier Instruction Manual 2 13 GPIB Operation GPIB Requirements Observe these rules when you use your AM 5030 with a GPIB network m Assign a unique device address to each device on the bus No two devices can share the same device address m Do not connect more than 15 devices to the bus m Connect one device for every 2 meters 6 feet of cable used m Do not use more than 20 meters 65 feet of cable for the entire bus m Turn on at least two thirds of the devices on the network while using the network m Connect the devices on the network in a star or linear configuration as shown in Figure 2 6 Do not use loop or parallel configurations GPIB Device GPIB Device GPIB Device Figure 2 6 Typical GPIB Network Configurations GPIB Device GPIB Device GPIB Device GPIB Device Setting the GPIB Parameters GPIB Address You must set the GPIB parameters of the AM 5030 to match the configuration of the bus and controller The GPIB ADDRESS button lets you set the AM 5030 device address The GPIB controller must use this address to send commands to the AM 5030 The address of the AM 5030 must be different from the addresses used by all other devices on the bus To s
30. connect the termination at the Amplifier output 2 Connect the current probe to the Amplifier INPUT 3 Connect the current loop calibration fixture to the calibration generator 50 Q fast rise output AM 503B amp AM 5030 Amplifier Instruction Manual 5 7 Performance Verification with an A6312 5 8 Equipment Settings Procedure NOTE If your oscilloscope cannot trigger on the pulse use another BNC cable to connect the trigger output of the pulse generator to the trigger input of the oscilloscope Configure the oscilloscope for an external trigger Make or verify the equipment settings in Table 5 3 Table 5 3 Equipment Settings for Rise Time Oscilloscope Vertical input impedance 500 Vertical gain 10 mV division Time base 2 ns division Record length 500 Coupling DC Offset 0 V mid scale Trigger type Edge Trigger mode Auto Trigger position 50 Acquisition mode Average Number of waveforms to average 32 Measurement type Rise Time Calibration Generator Period 1 us Output Fastrise Amplitude Maximum AM 503B and AM 5030 Coupling DC BW Limit Off full bandwidth Current division 5 mA division 1 Do not clamp the current probe around any conductor but make sure the jaws are locked shut 2 Pressthe Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalance routine to complete before proceeding The routine is complete when the indicator light turns off 3
31. correct measurement polarity make sure the probe arrow is pointing in the direction of conventional positive to negative current flow Reversing the flow will display the current waveform upside down on the oscilloscope AM 503B amp AM 5030 Amplifier Instruction Manual 2 3 Measurements AC Measurements 2 4 6 Press the Amplifier COUPLING button repeatedly until the DC light comes on Set the Amplifier CURRENT DIVISION to the desired setting using the and buttons 7 If necessary vertically position the resulting waveform using the OUTPUT DC LEVEL knob of the Amplifier 8 Adjust the oscilloscope time base and trigger as needed Figure 2 3 shows a current probe connected to a power supply line Notice that the probe arrow points toward the negative terminal of the power supply to conform to the conventional current flow of positive to negative Power Supply Conventional Current Arrow Figure 2 3 Current Probe Polarity To measure AC current only and remove the DC component of the current being measured follow the instructions below These are identical to the instructions for DC current measurements except that the Amplifier coupling in step 6 is set to AC 1 Verify that the vertical gain of the oscilloscope is 10 mV div the input coupling is DC and the input impedance is set to 50 Q 2 Adjustthe ground reference of the oscilloscope to move the trace to the desired
32. following formula di dt B where L is the inductance in henries F is the voltage of the pulse generator dt is the change in time and di is the change in current Generator AS Current Pulse Flow i Inductor Current eg Figure 3 8 Measuring Inductance with a Low Impedance Source NOTE If the probe impedance is a significant part of the total circuit inductance measurement accuracy will be affected Refer to the probe specifications for probe insertion impedance AM 503B amp AM 5030 Amplifier Instruction Manual 3 11 Application Notes Current F low i Time t dt Figure 3 9 Linear Current vs Time Ramp High Impedance Pulse If the pulse source has a higher impedance of known resistance such that the Sources output voltage drops as the current increases the inductance of a coil can be calculated by the time constant of the charge curve Figure 3 10 shows the setup diagram which is similar to the previous example The current ramp represented in Figure 3 11 shows how the values for the inductance formula are obtained Use this formula to calculate the inductance based on the current measurement L TR where L is the inductance in henries t is the time required for the current to rise or fall 63 2 of the total current value and R is the source resistance of the pulse generator 3 12 AM 503B amp
33. for A6312 5 13 Table 5 7 Required Test Equipment 5 16 Table 5 8 Equipment Settings for Bandwidth 5 17 Table 5 9 Equipment Settings for Rise Time 5 20 Table 5 10 Equipment Settings for DC Gain Accuracy 5 22 Table 5 11 DC Gain Accuracy Test for A6302 A6302XL 5 23 Table 5 12 DC Gain Accuracy Test Worksheet for A6302 A6302XL 5 25 Table 5 13 Required Test Equipment 5 27 Table 5 14 Equipment Settings for Bandwidth 5 29 Table 5 15 Equipment Settings for Rise Time 5 31 Table 5 16 Equipment Settings for DC Gain Accuracy 5 32 Table 5 17 DC Gain Accuracy Test for A6303 A6303XL 5 34 Table 5 18 DC Gain Accuracy Test Work Sheet for A6303 A6303XL en terrre es nen 5 36 Table 5 19 Required Test Equipment 5 37 Table 5 20 Equipment Settings for Rise Time 5 39 AM 503B amp AM 5030 Amplifier Instruction Manual vii Contents viii Table 5 21 Equipment Settings for DC Gain Accuracy 5 41 Table 5 22 DC Gain Accuracy Test for the A6304XL 5 43 Table 5 23 DC Gain Accuracy Test Work Sheet for the A6304XL 5 44 Table 6 1 Required Test Equipment 6 3 Table 6 2 Settings for DC Offset Adjustment 6 4 Table 6 3 Error Codes Requiring DC Offset Adjustment
34. product proves defective during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product In order to obtain service under this warranty Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix with shipping charges prepaid Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all shipping charges duties taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improper use or connection to incompatible equipment or c to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time o
35. proper performance of the AM 503B and AM 5030 Amplifiers with an A6302 or A6302XL current probe Tolerances that are specified in these procedures apply to the Amplifier and current probe and do not include test equipment error No probe or Amplifier adjustments are required during these test procedures Should any test fail refer to the troubleshooting section for troubleshooting recommendations Read page 5 1 before starting these procedures Also read each procedure through completely before starting to ensure proper completion Required Test Equipment To perform the acceptance tests in this section you will need the test equipment listed in Table 5 7 The test equipment must meet or exceed the specifications listed The test procedures may need to be modified if the recommended equipment is not used AM 503B amp AM 5030 Amplifier Instruction Manual 5 15 Performance Verification with an A6302 or A6302XL Table 5 7 Required Test Equipment Recommended Qty Item Description Equipment 1 Oscilloscope 350 MHz bandwidth TDS 520B 1 Current Probe AM503B or AM5030 Amplifier 1 Leveled Sine Wave 3 MHz to 50 MHz Wavetek 9100 with Generator Option 250 or SG 503 equivalent 1 Calibration Generator 1 MHz square wave rise time 1 ns Wavetek 9100 with 1 Vp p into 50 Option 250 or PG 506A equivalent 1 Digital Multimeter 0 25 31 digit resolution DM2510 G or Fluke 850x 884x 1 Current Source 0 396 accuracy 0 to
36. second product of 100 A us If a pulse measured with an 6312 probe has width of 3 us the maximum allowable peak current would be 100 A us divided by 3 us or 33 3 A Extending Current Range AN You may encounter situations where your measurement exceeds the maximum current rating of the connected probe This section discusses methods for extending AC and DC current ranges without exceeding specified limits WARNING To avoid personal injury or equipment damage do not exceed the specified electrical limits of the AM 503B and AM 5030 or any applicable accessories When using multiple conductors do not exceed current limits on either conductor AM 503B amp AM 5030 Amplifier Instruction Manual 3 5 Reference Notes Extending DC Range Sem en If you want to measure a low amplitude AC component that is superimposed on an extremely large steady state DC component such as in a power supply or if you want to extend the DC current range of your probe you can add offset bucking current with a second conductor To supply additional bucking current place a second conductor that has a pure DC component of known value in the probe jaw with the conductor under test as shown in Figure 3 4 a Orient the second conductor so that the bucking current flows in the opposite direction of the DC flow in the conductor under test You can increase the value of the bucking current by winding multiple turns of the second c
37. the PROBE DEGAUSS AUTOBALANCE button The Current P robe has been overloaded bumped or exposed to magnetic field AM 503B amp AM 5030 Amplifier Instruction Manual 3 19 Troubleshooting Table 3 4 Troubleshooting Cont Problem Measurements are inaccurate Remedy Degauss the probe The Amplifier output is notterminated into 50 O load Setthe input impedance of oscilloscope to 50 or connect a 50 Q feedthrough termination at the oscilloscope input Do not attach the termination at the Amplifier output Set the vertical amplifier of the oscilloscope to 10 mV div Adjust the oscilloscope ground reference Adjust the Amplifier OUTPUT DC LEVEL control to the zero current reference The measurement exceeds the maximum continuous current or Ampere second product ratings of the Current P robe If possible upgrade to a probe with a higher current rating or use a CT 4 transformer Measurements roll off at high frequencies Measurements exhibit excessive noise Measurement aberrations exceed the specified limit Measurements exhibit excessive delay or Slowed pulse response The Amplifier or oscilloscope bandwidth limit is turned on Verify that bandwidth limit Switches of both the Amplifier and the oscilloscope are set to the full bandwidth position Be careful to exceed the frequency limit of the probe used Frequencies above the probe design may cause overheating and damage to the probe Current Probe is
38. the rise time is less than the warranted specification Refer to Table 4 1 on page 4 2 AM 503B amp AM 5030 Amplifier Instruction Manual 5 39 Performance Verification an A6304XL Bandwidth DC Gain Accuracy A Equipment Connections 5 40 The bandwidth of the probe is derived as a function of its rise time The rise time t is measured in nanoseconds between the 10 and 90 points of the leading edge of the pulse Refer to the procedure on page 5 38 To calculate the probe bandwidth use the following formula 035 Bandwidth For example a rise time of 175 ns would result in the following solution 0 35 22 6 2 0 10 Hert 2 WARNING This test produces intense magnetic fields that may cause tions in a normally operating heart pacemaker or damage sensitive equipment Personnel fitted with pacemakers should not perform this test and should stay at least 10 feet from the current loop while the test is being conducted This procedure tests the DC gain accuracy of the A6304XL In this test you compare the voltage output of the Amplifier to a reference input 1 Using a BNC cable connect the Amplifier OUTPUT to a 50 Q feedthrough termination Attach the termination to a BNC to dual banana adapter Taking care to observe the adapter polarity insert the dual banana adapter into the digital multimeter DC voltage input 2 Connect the current loop to the current source
39. turns count you need a coil with a known number of turns to use as a reference The measurement setup is similar to the previously described one except the reference coil and the test coil are inserted into the current probe so that the currents oppose each other see Figure 3 13 You must observe the polarity of coil current to determine whether the test coil has more or fewer turns than the reference coil The turns are calculated by using the formula I NEE NEET where N is the number of turns in the test coil N is the number of turns in the reference coil J is the measured coil current and 1 is the input current Measure Input Current Here gt Current Flow i Clamp probe around coil to PA measure x current from coil turns Figure 3 12 Measuring the Number of Turns in a Coil AM 503B amp AM 5030 Amplifier Instruction Manual Application Notes A6303 Current P robe Current Flow in Coil 1 Input Current Current Flow in Coil 2 Figure 3 13 Turns Measurement Using Reference Coil AM 503B amp AM 5030 Amplifier Instruction Manual 3 15 Application Notes 3 16 AM 503B amp AM 5030 Amplifier Instruction Manual Error Codes Error Code 266 Error Code LO Other Error Codes During normal operation the CURRENT DIVISION readout of the AM 503B and AM 5030 displays the scale factor or other setting such as the
40. 0 8770 01 1 MANUAL TECH REF AM503B AM5030 80009 070877001 OPTIONAL ACCESSORIES 015 0601 50 1 ADAPTER 1 TURN CURRENT LOOP50 OHM 64537 1205 012 0991 00 CABLE INTCON SHLD CMPST GPIB CRC 12 TW 22526 81190 020 PR 24 28 AWG 2 METER DUAL SHIELD 24 POS 0 085 CTR RIBBON FEEDTHRU BOTH ENDS Figure 8 2 AM 503B amp AM 5030 Standard Accessories 8 6 AM 503B amp AM 5030 Amplifier Instruction Manual AM 503B amp AM 5030 Replaceable Parts CROSS INDEX MFR CODE NUMBER TO MANUFACTURER Gack Manufacturer Address City State Zip Code TKO392 NORTHWEST FASTENER SALES INC 7923 SW CIRRUS DRIVE BEAVERTON OR 97005 6448 TK0435 LEWIS SCREW CO 4300 S RACINE AVE CHICAGO IL 60609 3320 TK1163 POLYCAST INC 9898 SW TIGARD ST TIGARD OR 97223 TK1326 NORTHWEST FOURSLIDE INC 18224 SW 100TH CT TUALATIN OR 97062 TK1465 BEAVERTON PARTS MFG CO 1800 NW 216TH AVE HILLSBORO OR 97124 6629 TK1943 NEILSEN MANUFACTURING INC 3501 PORTLAND ROAD NE SALEM OR 97303 OJRO5 TRIQUEST CORP 3000 LEWIS AND CLARK HWY VANCOUVER WA 98661 2999 OKBZ5 MORELLIS Q amp D PLASTICS 1812 16TH AVE FOREST GROVE OR 97116 OKBO1 STAUFFER SUPPLY 810 SE SHERMAN PORTLAND OR 97214 00779 AMP INC 2800 FULLING MILL PO BOX 3608 HARRISBURG PA 17105 01295 TEXAS INSTRUMENTS INC 13500 N CENTRAL EXPY DALLAS TX 75262 5303 SEMICONDUCTOR GROUP PO BOX 655303 02768 ILLINOIS TOOL WORKS INC 195 ALGONQUIN ROAD DES PLAINES IL 60016 6103 FASTEX DIVISION 04811 PRECISION COIL SPRING CO 101
41. 00 mA 50A 50 10A 1A 100A 50 20A 2 200 50 50 2 200 SOSA Ec X current division SR Error Im 1 100 5 36 AM 503B amp AM 5030 Amplifier Instruction Manual I a Performance Verification with an A6304XL The test procedures in this section check for proper performance of the AM 503B and AM 5030 with an A6304XL current probe Tolerances that are specified in these procedures apply to the Amplifier and current probe and do not include test equipment error Table 5 19 is a list of equipment required for these procedures No probe or Amplifier adjustments are required during these test procedures Should any tests fail refer to the troubleshooting section for troubleshooting recommendations Read page 5 1 before starting these procedures Also read each procedure through completely before starting to ensure proper completion Required Test Equipment To perform the acceptance tests in this section you will need the test equipment listed in Table 5 19 The test equipment must meet or exceed the specifications listed The test procedures may need to be modified if the recommended equipment is not used Table 5 19 Required Test Equipment Recommended Qty Item Description Equipment 1 Oscilloscope 20 MHz bandwidth Tektronix TDS 520B 1 Digital Multimeter 0 25 31 5 digit resolution DM2510 G or Fluke 850x 884x 1 Current Source 0 3 accuracy 0 to 2 A Fluke 5700A or Wavetek 9100 with Option
42. 07 ROSE ST PO BOX 5450 EL MONTE CA 91734 05469 BEARINGS INC 3634 EUCLID PO BOX 6925 CLEVELAND OH 44101 12327 FREEWAY CORP 9301 ALLEN DR CLEVELAND OH 44125 4632 13103 THERMALLOY CO INC 2021 W VALLEY VIEW LN DALLAS TX 75381 PO BOX 810839 22526 BERG ELECTRONICS INC DUPONT 857 OLD TRAIL RD ETTERS PA 17319 24931 SPECIALTY CONNECTOR CO INC 2100 EARLYWOOD DR PO BOX 547 FRANKLIN IN 46131 3M099 PORTLAND SCREW CO 6520 N BASIN ST PORTLAND OR 97217 3920 50394 SPS TECHNOLOGIES INC HIGHLAND AVE JENKINTOWN PA 19046 UNBRAKO DIV 53387 MINNESOTA MINING MFG CO PO BOX 2963 AUSTIN TX 78769 2963 61058 MATSUSHITA ELECTRIC CORP OF TWO PANASONIC WAY SECAUCUS NJ 07094 AMERICA PANASONIC INDUSTRIAL CO DIV 61857 SAN 0 INDUSTRIAL CORP 91 3 COLIN DRIVE HOLBROOK NY 11741 64537 KDI ELECTRONICS INC 31 FARINELLA DR EAST HANOVER NJ 07936 SUBSIDIARY OF KDI CORP 73743 FISCHER SPECIAL MFG CO 111 INDUSTRIAL RD COLD SPRING KY 41076 9749 8X345 NORTHWEST SPRING amp MFG CO 5858 WILLOW LANE LAKE OSWEGO OR 97034 5343 80009 TEKTRONIX INC 14150 SW KARL BRAUN DR BEAVERTON OR 97077 0001 PO BOX 500 83486 ELCO INDUSTRIES INC 1101 SAMUELSON RD ROCKFORD IL 61101 91260 CONNOR SPRING AND MFG CO 1729 JUNCTION AVE SAN JOSE CA 95112 SLOSS AND BRITTAN INC 93907 TEXTRON INC 600 18TH AVE ROCKFORD IL 61108 5181 CAMCAR DIV AM 503B amp AM 5030 Amplifier Instruction Manual 8 7 AM 503B amp AM 5030 Replaceable Parts 8 8 AM 503B amp AM 5030 Amplifier Instruction Manual
43. 2 A Fluke 5700A or Wavetek 9100 with Option 250 1 Calibration Fixture 50 BNC Connector 015 0601 50 1 Current Loop 20 turns 27 AWG coated wire Refer to page 5 21 1 Termination 50 Q 0 1 0 5 W 011 0129 00 1 BNC Cable 50 1 05 m 42 in long 012 0057 01 1 BNC to Dual 103 0090 00 Banana Adapter AM 503B amp AM 5030 Amplifier Instruction Manual Performance Verification with an A6302 or A6302XL Bandwidth Equipment Connections Equipment Settings AM 503B amp AM 5030 Amplifier Instruction Manual This procedure tests the bandwidth of the A6302 and A6302XL Current Probes In this test you measure a signal at a relatively low frequency and again at the rated bandwidth of the probe The two measurements are compared to verify that the signal amplitude does not fall below 3 dB at the probe bandwidth Refer to Figure 5 4 when making equipment connections Amplifier in T D i Series Power ine Wave Module Generator Current Probe Output 50 Q oscilloscope input or add 500 termination here if oscilloscope has only high impedance input Calibration Fixture Figure 5 4 Bandwidth Test Setup for A6302 A6302XL 1 Using a 50 BNC cable connect the Amplifier OUTPUT to a 50 oscilloscope input If the input impedance of your oscilloscope is 1 MQ connect a 50 feedthrough termination at the oscilloscope input Do not connect the
44. 50 2A 200 mA 20A 50 5A 500 mA 50A 50 10A 1 A 100 50 20 A 2 200A 50 50A 2 200A f Record the digital multimeter reading as g Calculate the measured current Zn using the following formula 0 01 1 X current division For example you might have obtained values of 50 mV for M and 48 mV for M If you are using an Amplifier setting of 10 mA division you can compute 1 as _ 50 0x10 3 48x10 3 i 0 01 x 10x10 98 mA 5 34 AM 503B amp AM 5030 Amplifier Instruction Manual Performance Verification with an A6303 or A6303XL h Verify that the measured current Zm is within 3 of the test current Z by computing Error as follows SE Error 100 For example using a test current J of 100 mA and a measured current Im of 98 mA the Error would be 98 100 Error 100 x 100 2 AM 503B amp AM 5030 Amplifier Instruction Manual 5 35 Performance Verification with an A6303 or A6303XL Table 5 18 DC Gain Accuracy Test Work Sheet for A6303 A6303XL Turns of Current AM 503B and T Loop Passing AM 5030 Current Source Test Current Im Error Through Probe Current Division Output M Note Note EE 50 20 mA 2 mA 200 mA 50 50 mA 5 mA 500 mA 50 100 mA 10 mA 1A 50 200 mA 20 mA 2A 50 500 mA 50 mA 5A 50 1A 100 mA 10A 50 2A 200 mA 20A 50 5A 5
45. 5030 250 251 No Invalid GPIB command 252 No AMPS argument out of range Command not executed 253 No DCLEVel argument out of range Command not executed 254 256 No Invalid GPIB command 25 No PROBETRim argument out of range Command not executed 258 260 Invalid GPIB command 261 262 263 No 264 Io No probe attached to INPUT connector This can also occur if a current probe is defective DEGAuss argument out of range Command not executed Invalid GPIB command Probe opened during degauss autobalance 265 Probe open when degauss autobalance initiated 266 267 268 The Amplifier OUTPUT was not terminated into 50 It can also be caused by faulty hardware Internal buffer overflow Invalid GPIB command AM 503B amp AM 5030 Amplifier Instruction Manual 2 33 Error Messages amp Codes Table 2 5 AM 5030 Event Codes Cont Displayed on Error Number Front Panel Description of Error 350 Yes Amplifier needs repair Cannot EXit from this error 351 354 Yes Amplifier needs repair 355 Yes NVRAM failure Amplifier reset to factory default Will occur first power up after new firmware has been installed 356 Yes Amplifier needs repair 357 Yes Internal battery is weak and needs replacement displayed as 10 358 Yes An error occurred while the AM 5030 was restoring previously saved settings 359 Yes Probe needs repair AM 5030 cannot recognize the probe type 360 362 Y
46. 6302 A6302XL 1 Using a 50 BNC cable connect the Amplifier OUTPUT to a 50 oscilloscope input If the input impedance of your oscilloscope is 1 MQ connect a 50 feedthrough termination at the oscilloscope input Do not connect the termination at the Amplifier output 2 Connect the current probe to the Amplifier INPUT 3 Connect the current loop calibration fixture to the calibration generator 50 Q fast rise output AM 503B amp AM 5030 Amplifier Instruction Manual 5 19 Performance Verification with an A6302 or A6302XL 5 20 Equipment Settings Procedure NOTE If your oscilloscope cannot trigger on the pulse use another BNC cable to connect the trigger output of the pulse generator to the trigger input of the oscilloscope Configure the oscilloscope for an external trigger Make or verify the equipment settings in Table 5 9 Table 5 9 Equipment Settings for Rise Time Oscilloscope Vertical input impedance 500 Vertical gain 10 mV division Time base 2 ns division Record length 500 Coupling DC Offset 0 V mid scale Trigger type Edge Trigger mode Auto Trigger position 50 Acquisition mode Average Number of waveforms to average 8 Measurement type Rise Time Calibration Generator Period 1 us Output Fastrise Amplitude Maximum AM 503B and AM 5030 Coupling DC BW Limit Off full bandwidth Current division 5 mA division 1 Do not clamp the current probe around any condu
47. 6303 A6303XL 5 30 Figure 5 9 DC Gain Accuracy Test Setup for A6303 A6303XL 5 33 Figure 5 10 Rise Time Test Setup for the A6304XL 5 38 Figure 5 11 DC Gain Accuracy Test Setup for the A6304XL 5 41 Figure 6 1 A6312 A6302 and A6302XL DC Offset Adjustment Location seess eU VEO TER E Xr ES 6 3 Figure 6 2 A6303 and A6303XL Adjustment Locations 6 8 Figure 6 3 6303 and A6303XL Adjustment Setup 6 11 Figure 6 4 A6304XL Adjustment Locations 6 15 Figure 6 5 DC Gain Accuracy Adjustment Setup 6 17 Figure 6 6 A6304XL Adjustment Setup 6 18 Figure 7 1 Removing the AM 503B and AM 5030 Side Covers 7 4 Figure 7 2 Removing the Amplifier Release Lever 7 5 Figure 7 3 Location of Amplifier Interface Cables 7 5 Figure 7 4 Location of Front Panel Screws 7 6 Figure 7 5 Removing the Latch Bar Assembly 7 6 Figure 7 6 Removing the Amplifier Output Connector 7 1 Figure 7 7 Removing the Amplifier Front Panel Board 7 8 Figure 7 8 Using the Rear Interface Output Connector 7 9 Figure 7 9 Prying Battery Terminal to Remove Battery 7 10 Figure 7 10 Removing the Backup 7 10 Figure 7 11 Replacing the Backup Battery 7 11 Figure 8 1 AM 503B amp AM 5030 R
48. A6304XL 3 Clamp the current probe around the current loop Check that the arrow shaped indicator on the probe points away from the current source See Figure 5 11 on page 5 41 4 For each of the Amplifier current division settings in Table 5 22 on page 5 43 perform the following steps a Set the Amplifier to the desired current division setting from Table 5 22 b Setthe current source to the correct positive test current using Table 5 22 c Turnon the current source d Record the exact measurement of the digital multimeter as M You can copy Table 5 23 on page 5 44 to record the results of your measure ments e Setthe current source for the correct negative test current using Table 5 22 f Record the digital multimeter reading as g Calculate the measured current Zn using the following formula h 2 X current division 0 01 For example you might have obtained values of 50 mV for M and 48 mV for M If you are using an Amplifier setting of 1 A division you can compute 1 as 23 42 3 00x10 48x10 in 0 01 1 9 80A h Verify that the measured current Zm is within 3 of the test current by computing Error as follows NE A I x 100 9o Error For example using a test current J of 10 A and a measured current In of 9 80 A the 96 Error would be 9 80 10 0 Error 100 x 100 2 5 42 AM 503B amp AM 5030 Amplifier Instruc
49. Also read each procedure through completely before starting to ensure proper completion Table 6 8 Required Test Equipment Recommended Qty Item Description Example 1 Oscilloscope 20 MHz bandwidth Tektronix TDS 520B 1 Current Probe AM 503B or AM 5030 Amplifier 1 Calibration Generator Square wave with a rise time 35 ns AVTECH 1 5 A into 50 Q AVR 3 PW C P TEK2 1 Digital Multimeter 0 25 31 5 digit resolution DM2510 G or Fluke 850x 884x 1 Current Source 0 3 accuracy 0 to 2 A Fluke 5700A or Wavetek 9100 with Option 250 1 Current Loop 250 turns 067 0240 00 1 Termination 50 0 1 0 5 W 011 0129 00 3 BNC Cables 50 Q 1 05 m 42 in long 012 0057 01 1 BNC to Dual 103 0090 00 Banana Adapter 1 AVTECH Electrosystems Ltd P O Box 265 Ogdensburg NY 13669 0265 315 472 5270 or 800 265 6681 AM 503B amp AM 5030 Amplifier Instruction Manual 6 13 A6304XL Adjustments A6304XL DC Offset Adjustment Equipment Connections 6 14 Equipment Settings Procedure This procedure details how to adjust the A6304XL offset 1 Connect the Amplifier OUTPUT to a 50 Q oscilloscope input using a 50 2 BNC cable If the input impedance of your oscilloscope is 1 connect 50 Q feedthrough termination to the oscilloscope input Do not connect the termination at the Amplifier output 2 Connect the current probe to the Amplifier INPUT connector 3 Do not clamp the current probe around any conductor but mak
50. EC Declaration of Conformity Tektronix Holland N V Marktweg 73A 8444 AB Heerenveen The Netherlands declare under sole responsibility that the 5030 and 50305 Current Probe Amplifiers meet the intent of Directive 89 336 EEC for Electromagnetic Compatibility Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities EN 55011 Class B Radiated and Conducted Emissions EN 50081 1 Emissions EN 60555 2 AC Power Line Harmonic Emissions EN 50082 1 Immunity IEC 801 2 Electrostatic Discharge Immunity IEC 801 3 RF Electromagnetic Field Immunity IEC 801 4 Electrical Fast Transient Burst Immunity Table of Contents General Safety Summary ix Service Safety xiii Preface oues eer iesbeeeneeza e rx oy Bb E a m Pica e ete ele Xv Getting Started Getting Started an Ux er whe Us 1 1 Customer Support isi eee ehe ree he RUN ce IR 1 1 AM 503B and AM 5030 System Configuration 1 2 Standard Accessories uses poke ME persa ne dore Dye ee pd een a 1 3 Optional Accessories 1 3 Installing the TM Series Power Module 1 4 Installing the AM 503B or AM 5030 Into the Power Module 1 5 Connecting the Amplifier to an Oscilloscope 1 7 Con
51. In an automated environment degaussing with the conductor in the probe jaws eliminates the need to manually remove the probe NOTE Be certain that the conductor in the probe jaws is completely unpowered Any current flowing through the conductor will cause a residual offset in the current probe and the Amplifier may fail calibration If the impedance of your circuit is higher than that shown in Table 3 1 the degauss procedure will succeed because the Amplifier will be able to saturate the probe core While degauss occurs the probe will induce a voltage in the unpowered circuit This also appears in Table 3 1 Your circuit must be able to absorb this induced voltage With low impedance circuits several amperes may be induced in the circuit being measured This may be of concern when you are using very small conductors Table 3 1 Unpowered Circuit Degauss Limits Probe Type Minimum Circuit Resistance Maximum Induced Voltage A6312 10 mQ 40 mV at 200 Hz A6302 10 mQ 40 mV at 200 Hz A6303 5mQ 30 mV at 200 Hz A6302XL 10 mQ 40 mV at 200 Hz A6303XL 5mO 30 mV at 200 Hz A6304XL 1mQ 15 mV at 100 Hz AM 503B amp AM 5030 Amplifier Instruction Manual 3 1 Reference Notes Bandwidth Limiting You can reduce the apparent noise on a current waveform by pressing the 20MHz BW LIMIT button on the AM 503B and AM 5030 You can also use the bandwidth limiting of your oscilloscope WARNING Do not exceed the specified bandwidth l
52. Instruction Manual Tektronix AM 503B amp AM 5030 AC DC Current Probe Amplifiers 070 8766 05 This document applies for firmware version 3 0 and above Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to the Safety Summary prior to performing service Copyright Tektronix Inc 1994 All rights reserved Licensed software products are owned by Tektronix or its suppliers and are protected by United States copyright laws and international treaty provisions Use duplication or disclosure by the Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 or subparagraphs c 1 and 2 of the Commercial Computer Software Restricted Rights clause at FAR 52 227 19 as applicable Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Printed in the U S A Tektronix Inc P O Box 1000 Wilsonville OR 97070 1000 TEKTRONIX and TEK are registered trademarks of Tektronix Inc WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one 1 year from the date of shipment If any such
53. L Mfr Code TK1465 53387 53387 80009 80009 01295 01295 80009 80009 80009 80009 61058 61857 0435 1326 1465 0435 OJRO5 73743 1943 OKBO1 93907 83486 80009 73743 Mfr Part No ORDER BY DESC ORDER BY DESC ORDER BY DESC 175553400 160956501 SN75161BN SN75160BN 160956900 160956901 160956901 160956902 SP389 SP7 3A ORDER BY DESC ORDER BY DESC ORDER BY DESC ORDER BY DESC ORDER BY DESC 12161 50 ORDER BY DESC ORDER BY DESC 829 06815 024 ORDER BY DESC 220072900 12161 50 AM 503 4 5030 Amplifier Instruction Manual AM 503B amp AM 5030 Replaceable Parts Fig amp Index Tektronix Serial No Mfr No Part No Effective Dscont Qty 12345 Name amp Description Code Mfr Part No 22 210 1178 00 2 WASHER SHLDR U W 220 TRANSISTOR 13103 7721 5 23 342 0967 00 2 INSULATOR PLATE TRANSISTOR SILCONE 80009 342096700 RUBBER WITH ADHESIVE 24 214 3089 01 1 LOCKOUT PLUG IN PLASTIC OJRO5 ORDER BY DESC AM5030 ONLY 25 426 0724 30 1 FR SECT PL IN BOTTOM TK1465 ORDER BY DESC 26 211 0101 00 2 SCREWMACHINE 4 40 X 0 25 FLH 100 DEG STL TK0435 ORDER BY DESC 27 211 0101 00 2 SCREWMACHINE 4 40 X 0 25 FLH 100 DEG STL TK0435 ORDER BY DESC 28 131 1315 01 1 JACK BNC PNL 50 OHM FEMALE 24931 28JR306 1 STR PELTOLA REAR PNL SILVER BRIGHT ALLOY 0 576 0 366 TERMN 0 375 32
54. M 5030 Front Panel Error Codes Error Number Description of Error 263 Probe opened during degauss autobalance 266 The Amplifier OUTPUT was not terminated into 50 It can also be caused by faulty hardware 267 Internal buffer overflow 350 354 Amplifier needs repair 355 NVRAM failure Amplifier reset to factory default Will occur first power up after new firmware has been installed 356 Amplifier needs repair 357 or LO Internal battery is weak and needs replacement 358 An error occurred while the Amplifier was restoring previously saved settings 359 Probe needs repair the Amplifier cannot recognize the probe type Try removing and reconnecting the current probe and make sure itis locked 360 362 Amplifier needs repair 363 364 Amplifier or probe needs repair 550 594 Error occurred during internal automatic adjustment R epeated errors in the range 550 594 indicate the Amplifier 150 768 needs repair 580 and 581 indicate that the Amplifier was unable to complete a probe offset adjustment See the DC Offset Adjustment procedure for the particular probe you are using 3 18 AM 503B amp AM 5030 Amplifier Instruction Manual Troubleshooting Table 3 4 lists possible problems that you may encounter when measuring current with the AM 503B and AM 5030 Use this as a quick troubleshooting reference Table 3 4 Troubleshooting Problem Amplifier will not power up though the TM Series Power Module does power
55. Systems m Inductance Measurements m Continuity Test of Multiple Conductor Cable m Measuring Inductor Turns Count Automobile Charging Systems Most automotive charging systems are three phase alternators with a diode rectifier network A meter averages current from all three phases and cannot detect a single phase diode problem Observing the charge current waveform can quickly reveal if one diode is shorted or open The diagram in Figure 3 6 shows the equipment setup Refer to Table 3 2 for the test equipment setup An A6303 Current Probe was used for this high cur rent low voltage application The A6303 is degaussed and clamped around the positive battery lead from the alternator The probe arrow is pointed away from the alternator and toward the battery side of the circuit to reflect conventional current The automobile is started and the lights are turned on to add a significant load to the circuit Table 3 2 Automobile Charging Systems Test Setup Instrument Control Setting AM 503B and AM 5030 COUPLING DC OUTPUT DC LEVEL 0v oscilloscope ground reference line CURRENT DIVISION 10A 20MHz BW LIMIT off Oscilloscope Coupling DC Volts Division 10 mV Zero Current Reference Center graticule line Time Base 200 us division AM 503B amp AM 5030 Amplifier Instruction Manual 3 9 Application Notes Ground Figure 3 6 Setup for Measuring Charging Current Battery To Current Probe Amplifier
56. able 5 2 Table 5 2 Equipment Settings for Bandwidth Oscilloscope Vertical input impedance 500 Vertical gain 10 mV division Time base 200 ns division Record length 500 Coupling DC Offset 0 V mid scale AM 503B amp AM 5030 Amplifier Instruction Manual 5 5 Performance Verification with an A6312 5 6 Procedure Table 5 2 Equipment Settings for Bandwidth Cont Oscilloscope Trigger type Edge Trigger mode Auto Trigger position 50 Acquisition mode Average Number of waveforms to average 8 Measurement type Peak to P eak Leveled Sine Wave Generator Frequency 3MHz Amplitude 3 Vp AM 503B and AM 5030 Coupling DC BW Limit Off full bandwidth Current division 10 mA division 1 Do not clamp the current probe around any conductor but make sure the jaws are locked shut 2 Pressthe Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalance routine to complete before proceeding The routine is complete when the indicator light turns off 3 Clamp the current probe around the calibration fixture 4 Adjust the signal generator output so that the Amplifier output is approxi mately 60 or six graticule divisions on the oscilloscope 5 Using the peak peak measurement capability of the oscilloscope measure and record the peak peak reading as 6 Setthe oscilloscope time base to 5 ns division Increase the signal generator frequency to the warranted bandw
57. about the CT 4 consult your Tektronix sales representative Because the CT 4 has a lower AC bandwidth limit than the A6312 A6302 or A6302XL set the Amplifier coupling to DC when using the CT 4 Increasing Sensitivity If you are measuring DC or low frequency AC signals of very small amplitudes you can increase measurement sensitivity of your Current Probe by winding several turns of the conductor under test around the probe as shown in Fig ure 3 5 The signal is multiplied by the number of turns around the probe When viewing the signal on the oscilloscope screen divide the displayed amplitude by the number of turns to obtain the actual current value For example if a conductor is wrapped around the probe five times and the oscilloscope shows a reading of 5 mA DC the actual current flow is 5 mA divided by 5 or 1mADC NOTE Winding multiple turns around the probe increases insertion impedance and reduces the upper bandwidth limit of the probe Conductor Under Test Extra Turns for Increased S ensitivity Current Probe Figure 3 5 Increasing Probe Sensitivity AM 503B amp AM 5030 Amplifier Instruction Manual 3 7 Reference Notes 3 8 AM 503B amp AM 5030 Amplifier Instruction Manual y 1 Application Notes This section describes some of the typical measurement applications of the AM 503B and AM 5030 Current Probe Amplifiers Automobile Charging
58. aie ee as dee he aka ee An 2 22 COU PIN Gi NU UD RU S MUR aa 2 22 DEEE VEN ORE ERR BR RR PSU Aaa ana seine 2 23 DEGAuss No Query Form 2 23 ERRor Query Only BAe 2 24 EVent Query Only 3 5 IER re RUN ARES 2 24 Sp Semen 2 24 4 E RU e fuu Aes 2 25 AM 503B amp AM 5030 Amplifier Instruction Manual i Contents HELp Query Only iiis bcp Eee 2 25 ID Query Only s eec en yl CETERIS 2 26 INIT NO Query Form ra eI SR ER ORIS REI SESS CE IERI 2 26 OVerload Query Only 1 2 26 PATH nn RE RERO EIC Aaah E ee bie ee 2 27 PROBEOPen Query Only 2 27 PROBETRiN uL ei det UN RSS ES ERR HP EUCH 2 28 PROBETYpe Query Only 2 29 ROS oed oo Re sid ete os t ste LA IR mit ut 2 29 SERIAL Query 2 30 SET CQuery ONIY 222 V ea Ee ES ER HIR BE wie EUIS GC NES T SUR 2 30 TEST NG Query For nee RIDGE DER ICE 2 31 UNItS Query Only dee E RO ES RU EE S De Re 2 31 Error Messages amp Codes 2 33 Reference Reference Notes zn ra 3 1 Degaussing
59. ance routine has been performed after the 20 minute warm up period Equipment Preparation Before performing the verification tests install all plug in units into the power module and turn the power on Turn any remaining equipment on and allow the entire system including the attached probe to warm up for a minimum of 20 minutes AM 503B amp AM 5030 Amplifier Instruction Manual 5 1 Performance Verification Setup for Current Probes NOTE Before performing any verification procedure properly degauss the probe Remove the probe from any current carrying conductor lock the probe and press the Amplifier PROBE DEGAUSS AUTOBALANCE button The degauss autobalance routine is complete when the indicator light turns off The Amplifier front panel will display an error code 266 during the degauss autobalance routine if the Amplifier is not properly terminated into 50 Q Verify that the oscilloscope input is 50 and set to DC coupling Use a 50 Q feedthrough termination attached at the oscilloscope input if necessary Warranted Specifications The warranted specifications for the performance verification procedures are listed in Table 4 1 on page 4 2 5 2 AM 503B amp AM 5030 Amplifier Instruction Manual I De CIC Performance Verification with an A6312 The test procedures in this section verify proper performance of the AM 503B and AM 5030 Amplifiers with an A6312 current probe Tolerances that are specified in these proc
60. as 6 Set the oscilloscope time base to 50 ns division Increase the signal generator frequency to the warranted bandwidth Refer to Table 4 1 on page 4 2 7 Using the peak peak measurement capability of the oscilloscope measure and record the peak peak reading as M AM 503B amp AM 5030 Amplifier Instruction Manual 5 29 Performance Verification with an A6303 or A6303XL Rise Time Equipment Connections 5 30 Equipment Settings 8 The probe meets the bandwidth specification if the ratio of the signal amplitude at the warranted bandwidth is at least 0 707 of the signal amplitude at 3 MHz Use the following formula to check probe bandwidth M s 0 707 This procedure measures the rise time of the A6303 and A6303XL In this test you directly measure the rise time of a step input Refer to Figure 5 8 when making equipment connections Amplifier in T Calibration Series Power Generator Test Oscilloscope Module Current 50 O Input Calibration Fixture Figure 5 8 Rise Time Test Setup for A6303 A6303XL 1 Using a BNC cable connect the Amplifier OUTPUT to a 50 Q oscilloscope input If the input impedance of your oscilloscope is 1 MQ connect a 50 2 feedthrough termination at the oscilloscope input Do not connect the termination at the Amplifier output 2 Connect the probe to the Amplifier 3 Connect the current loop calib
61. atch perform these steps to select the correct value 1 Push up on the latch and pull the voltage selector assembly out Disassemble the voltage selector as shown in Figure 1 3 Rotate the fuse block until the proper voltage appears in the window gt E 5 Reassemble the voltage selector and push it back into the power module until it snaps into place 5 Using the correct power cord connect the power module to the AC line receptacle Rotate fuse block so that the correct voltage appears in the window Fuse Fuse Block Selector Window Figure 1 3 Changing the TM 502A Operating Voltage Installing the AM 503B or AM 5030 Into the Power Module CAUTION Make sure the power switch of the power module is turned off before VAN installing the Amplifier If you install or remove a plug in instrument while the power module is on you could damage the power module the Amplifier or the current probe AM 503B amp AM 5030 Amplifier Instruction Manual 1 5 Getting Started Release Lever 16 ZN CAUTION Do not attempt to install an AM 5030 amplifier into a TM 500 series power module The backplane connector scheme is different and damage to the amplifier will result To install the Amplifier into the power module align the grooves of the Amplifier with the rails of the power module and push the Amplifier into the power module until the instrument snaps into place see Figure 1 4 To remove the Am
62. ations For additional probe specifications refer to the probe s Instructions These specifications are valid only under the following conditions The probe and amplifier have been calibrated at an ambient temperature of 222187 The probe and amplifier are operating in an environment whose limits are described in Table 4 4 the operating temperature limits are 0 C to 50 C unless otherwise stated The probe and amplifier have had a warm up period of at least 20 minutes The probe degauss autobalance routine has been performed after the 20 minute warm up period and thereafter whenever the PROBE DEGAUSS AUTOBALANCE light blinks The Amplifier output is properly terminated into 50 9 Specifications are separated into two categories warranted specifications and nominal or typical characteristics Because of a change in the probe input connector the performance specifications are guaranteed only for probes having the following serial numbers A6312 All A6302 050000 and above A6303 B022000 and above A6302XL All A6303XL All A6304XL All Probes with earlier serial numbers can be updated contact your nearest Tektronix Service Center AM 503B amp AM 5030 Amplifier Instruction Manual 4 1 Specifications Warranted Specifications Warranted specifications Table 4 1 are guaranteed performance specifications unless specifically designated as typical or nominal Table 4 1 Wa
63. ault settings m COUPLING is set to GROUND m Amps division is set to minimum for attached probe m BWLIMIT is set to OFF m DCLEVEL is set to O zero The degauss lamp will flash if probe is connected indicating that a probe degauss is required PROBETRim settings are not changed Syntax INIT OVerload Query Only Returns the status of the overload indicator the front panel OVERLOAD light Syntax OVerload Returns OVERLOAD ON OVERLOAD OFF Examples might return OVERLOAD indicating an overload condition has occurred 2 26 AM 503B amp AM 5030 Amplifier Instruction Manual Commands PATH Controls whether queries return the command header the command name along with the returned data With PATH off BWLIMIT might return ON With PATH on the same query would return BWLIMIT ON The PATH command does not affect the data returned from SET which will always return command headers This is because the reply to SET must always be able to be sent as a command string to the AM 5030 Syntax PATH ON PATH OFF PATH Arguments ON turns header return on OFF prevents the inclusion of command name headers in query return strings other than SET Examples PATH OFF eliminates headers command names from query return strings PATH might return OFF to indicate that headers are removed from query return strings or PATH ON to indicate that headers are included in query return strings PROBEOPen Query Only Retu
64. bles AM 503B amp AM 5030 Amplifier Instruction Manual 7 5 Disassembly 4 Using a Pozidriv 1 screwdriver remove the two top screws and the two bottom screws that hold on the front panel and remove the front panel Figure 7 4 shows the screw locations Screws Pozidriv 1 Figure 7 4 Location of Front Panel Screws 5 Using a spring hook or a pair of needle nose pliers remove the retaining spring Refer to Figure 7 2 6 Push the latch bar forward until it clears the the retaining latch Refer to Figure 7 5 7 Push the retaining latch upward past the retaining clip 8 Toreassemble reverse this procedure Latch Bar Front Panel Figure 7 5 Removing the Latch Bar Assembly 7 6 AM 503B amp AM 5030 Amplifier Instruction Manual Disassembly Front Panel Disassembly This procedure describes how to disassemble and reassemble the front panel assembly Refer to Figures 7 6 and 7 7 when performing this procedure 1 ATA Remove the front panel from the Amplifier chassis described earlier Remove the knob by firmly pushing against shaft from the rear of the panel Unplug the Peltola connector from the back of the BNC connector Using a inch wrench remove the retaining nut on the back of the BNC connector and remove the washer Pull the BNC connector out of the front panel To reassemble align the flat spot of the connector s threaded end with the f
65. bration test Meets FCC Part 15 Subpart B Class A AM 503B amp AM 5030 Amplifier Instruction Manual Warning The following servicing instructions are for use only by qualified personnel To avoid personal injury do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so Refer to General Safety Summary and Service Safety Summary prior to performing any service nup du Performance Verification E ry Performance Verification Setup The Performance Verification tests allow you to demonstrate that the Current Probe Amplifier Current Probe meet their specified levels of performance Since the AM 503B and AM 5030 cannot operate without a current probe different procedures are provided so that you can use the one that matches your current probe Tolerances that are specified in these procedures apply to the Amplifier and current probe and do not include test equipment error The recommended calibration interval is one year Test Procedure Conditions These procedures are valid only under the following conditions m The system has been calibrated at an ambient temperature of 23 5 C m The system is operating in an environment whose limits are described in Table 4 4 on page 4 4 m The system including probe has had a warm up period of at least 20 minutes m The probe degauss autobal
66. can be used with any other AM 503B or AM 5030 without readjustment The Maintenance section supports the routine maintenance and repair of mechanical parts associated with the amplifiers The Glossary and Index are provided as quick reference locators for important information You can find the documentation supporting the maintenance and repair of the current probes in the following manuals m A6312 Instructions m A6302 amp A6302XL Instructions m A6303 amp A6303XL Instructions A6304XL Instructions The term Amplifier is used to refer to either the AM 503B or AM 5030 when referring to common attributes If a subject is unique to either amplifier the amplifier will be referred to directly by model AM 503B amp AM 5030 Amplifier Instruction Manual XV Preface xvi AM 503B amp AM 5030 Amplifier Instruction Manual Getting Started Getting Started Customer Support Operational Support Service Support The AM 503B and AM 5030 current probe amplifiers let you use one probe to simultaneously measure AC and DC current The Amplifier converts the sensed current into a proportional voltage signal that you can measure directly with an oscilloscope The AM 503B and AM 5030 provide better linearity than other current measurement systems because of a current feedback process used with the probe DC measurement capability and high bandwidth allow the Amplifier to accurately represent square waves and fast rise si
67. ccurate readings while using the AM 503B and AM 5030 the vertical gain of the oscilloscope channel must always remain at 10 mV Div and the coupling must remain at DC AM 503B amp AM 5030 Amplifier Instruction Manual 1 7 Getting Started Connecting a Current Probe to the Amplifier A Amplifier To connect a current probe to the Amplifier input connector align the tab of the probe connector with the slot in the Amplifier INPUT connector as shown in Figure 1 5 a Align the dot on the probe connector with the groove opening of the input connector as shown in Figure 1 5 b Push the probe connector in while twisting the barrel clockwise to lock the connector CAUTION Handle current probes with care Do not drop a probe or subject it to impact or the core may crack Do not connect or disconnect a current probe while the probe is clamped around a live conductor or while the AM 503B and AM 5030 is powered on or the probe may suffer electrical damage Push connector in and twist to lock OC H 22 Current Probe Connector Tab 5 Amplifier Ps Slot Groove Alignment Dot a Align the Tab With the Connector Slot b Insertthe Connector Into the Amplifier Figure 1 5 Connecting a Current Probe to the Amplifier 1 8 Each current probe is calibrated before it is shipped and should not require further adjustment If a probe requires ad
68. ceed its output dynamic range AM 503B amp AM 5030 Amplifier Instruction Manual 3 3 Reference Notes Maximum Current Limits Procedure A 3 4 Current probes have three maximum current ratings continuous pulsed Ampere second product Exceeding any of these ratings can saturate the probe core magnetizing the core and causing measurement errors Specifications in the probe Instructions lists the maximum current ratings of compatible probes m Maximum Continuous Current refers to the maximum current that can be continuously measured at DC or at a specified AC frequency The maximum continuous current value is derated with frequency as the frequency increases the maximum continuous current rating decreases m Maximum Pulsed Current refers to the maximum peak value of pulsed current the probe can accurately measure regardless of how short within bandwidth limitations the pulse duration is Ampere Second Product defines the maximum width of pulsed current that you can measure when the pulse amplitude is between the maximum continuous and maximum pulsed current specifications The maximum continuous specification itself varies by frequency NOTE Always degauss the probe after measuring a current that exceeds the maximum continuous current maximum pulsed current or Ampere second product rating of the probe Exceeding these ratings can magnetize the probe and cause measurement errors To determine if your m
69. coupling make sure that the input DC current does not exceed the probe specifications AC coupling will affect waveforms at frequencies higher than the AC Coupling Low Frequency Bandwidth For example pulsed currents may exhibit rolloff or decreased amplitude Figure 3 2 a shows a low frequency square wave using AC coupling The signal exhibits low frequency rolloff By changing the Amplifier coupling to DC the pulse is displayed as truly square as shown in Figure 3 2 b a AC Coupled Signal b DC Coupled Signal Figure 3 2 Effect of AC or DC Coupling on Low Frequency Signals If you are trying to examine a low frequency signal that is superimposed on a comparatively large DC component you can resolve the signal by performing these steps 1 Press the COUPLING button on the Amplifier repeatedly until the AC light goes on 2 Adjustthe CURRENT DIVISION controls on the Amplifier so that the signal shows maximum detail without going off the oscilloscope screen 3 Press the COUPLING button of the Amplifier repeatedly until the DC light goes on Center the DC component on the zero current line by adjusting the OUTPUT DC LEVEL control of the Amplifier The signal trace on the oscilloscope will move up and down as the control is adjusted NOTE Even when making AC current measurements leave the oscilloscope coupling on DC Change only the Amplifier coupling to AC Using the oscillo scope AC coupling may cause the Amplifier to ex
70. ct the trigger output of the pulse generator to the trigger input of the oscilloscope Configure the oscilloscope for an external trigger AM 503B amp AM 5030 Amplifier Instruction Manual Performance Verification an A6304XL Equipment Settings or check the equipment settings in Table 5 20 Table 5 20 Equipment Settings for Rise Time Oscilloscope Vertical input impedance 500 Vertical gain 10 mV division Time base 50 ns division Record length 500 Coupling DC Offset 0 V mid scale Trigger type Edge Trigger mode Auto Trigger position 50 Acquisition mode Average Number of waveforms to average 8 Measurement type Rise Time Calibration Generator Pulse width 250 us Pulse repetition frequency 25 Hz Amplitude 5 A peak AM 503B and AM 5030 Coupling DC BW Limit Off Current division 1 A division Procedure 1 Do not clamp the current probe around any conductor but make sure the jaws are locked shut Press the Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalance routine to complete before proceeding The routine is complete when the indicator light turns off Clamp the current probe around the current loop calibration fixture Check that the arrow shaped indicator on the probe points away from the source Using the measurement capability of the oscilloscope measure the rise time of the displayed pulse from 10 to 90 amplitude Check that
71. ctor but make sure the jaws are locked shut 2 Pressthe Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalance routine to complete before proceeding The routine is complete when the indicator light turns off 3 Clamp the current probe around the calibration fixture Verify that the arrow shaped indicator on the probe points away from the pulse source 4 Using the measurement capability of the oscilloscope measure the rise time of the displayed pulse from 10 to 90 amplitude AM 503B amp AM 5030 Amplifier Instruction Manual Performance Verification with an A6302 or A6302XL 5 Verify that the rise time is less than the warranted specification Refer to Table 4 1 on page 4 2 DC Gain Accuracy This procedure tests the DC gain accuracy of the A6302 and A6302XL Current Probes In this test you compare the voltage output of the Amplifier to a reference input Current Loop for DC Gain You will need to construct a simple current loop in order to complete the DC Accuracy Check gain accuracy tests pacemakers or damage to sensitive equipment WARNING Magnetic fields are produced that may cause a malfunction in heart Construct the loop using a cylindrical form approximately 3 inches in diameter wind exactly 20 turns of 27 coated wire NOTE Ensure that the current loop has exactly 20 turns A significant error will result for each turn variance from 20 turns Equipment Connectio
72. e Amplifier is not properly terminated into 50 Q Verify that the oscilloscope input is 50 Q and set to DC coupling If necessary use a 50 Q termination at the oscilloscope input 5 If no error codes are displayed after degauss autobalance routine completes no offset adjustment is necessary If any of the error codes listed in Table 6 6 are displayed continue with the procedure Table 6 6 Error Codes Requiring DC Offset Adjustment Error Code 580 Unable to complete negative offset adjustment 581 Unable to complete positive offset adjustment 6 Remove the probe access plug for the DC Offset adjust see Figure 6 2 AM 503B amp AM 5030 Amplifier Instruction Manual 6 9 A6303 and A6303XL Adjustments 7 10 11 Press and hold the 20 MHz BW LIMIT button and while holding it press the PROBE DEGAUSS AUTOBALANCE button This sets the front panel display to 00 and puts the AM 503B and AM 5030 into an internal test mode Press the CURRENT DIVISION button until the front panel display reads 52 Press and release the 20 MHz BW LIMIT button The Amplifier will degauss itself wait until the DEGAUSS light goes out Adjust the DC Offset control so that the oscilloscope trace is on the center graticule line zero offset 1 division Press and release the 20MHz BW LIMIT button then press and release the COUPLING button This exits the AM 503B and AM 5030 test mode A6303 and A6303XL Trans
73. e routine to complete before proceeding The routine is complete when the indicator light turns off Clamp the current probe around the 20 turn current loop as shown in Figure 5 6 on page 5 22 Verify that the arrow shaped indicator on the probe points away from the current source AM 503B amp AM 5030 Amplifier Instruction Manual Performance Verification with an A6312 4 For each of the Amplifier current division settings in Table 5 5 perform the following steps a Set the Amplifier to the desired current division setting from Table 5 5 b Set the current source to the correct positive test current using Table 5 5 Turn on the current source d Record the exact measurement of the digital multimeter as You can copy Table 5 6 on page 5 13 to record the results of your measure ments e Setthe current source for the correct negative test current using Table 5 5 Table 5 5 DC Gain Accuracy Test for A6312 Turns of Current AM 503B and Loop Passing AM 5030 Current Source Test Current Through Probe Current Division Output 20 1 mA 250 pA 10 mA 20 2 mA 500 uA 20 mA 20 5 mA 1 25 mA 50 mA 20 10 mA 2 5 mA 100 mA 20 20 mA 5 mA 200 mA 20 50 mA 12 5 mA 500 mA 20 100 mA 25 mA 1A 20 200 mA 50 mA 2A 20 500 mA 125 mA 5A 20 1A 250 mA 10A 20 2A 500 mA 20A 20 5A 1A 40A f Record the digital multimeter reading as g Calculate the measured current Zn using the following formu
74. e sure the jaws are locked shut Make or verify the equipment settings in Table 6 9 Table 6 9 Settings for DC Offset Adjustment AM 503B and AM 5030 Coupling DC BW Limit Off full bandwidth Current division 1 Afdivision Oscilloscope Vertical Gain 10 mV division Time Base 1 ms division Auto triggered Input Coupling Ground 1 Move the oscilloscope trace to the center horizontal graticule line using the vertical position control 2 Change the oscilloscope input coupling to DC 3 Do not clamp the current probe around any conductor but make sure the jaws are locked shut 4 Press the Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalance routine to complete before proceeding The routine is complete when the indicator light turns off NOTE The Amplifier front panel will display error code 266 after the degauss autobalance routine completes if the Amplifier is not properly terminated into 50 Q Verify that the oscilloscope input is 50 Q and set to DC coupling If necessary use a 50 Q termination at the oscilloscope input AM 503B amp AM 5030 Amplifier Instruction Manual A6304XL Adjustments 5 If no error codes are displayed after degauss autobalance routine completes no offset adjustment is necessary Go to the DC Gain Adjustment on page 6 16 6 If either of the error codes in Table 6 10 are displayed continue with this procedure Table 6 10 Error Codes R
75. easurement exceeds the Ampere second product perform either Procedure A or Procedure B To determine the maximum allowable pulse width measure the peak current of the pulse see Figure 3 3 Divide the Ampere second or Ampere microse cond specification of your probe by the measured peak current of the pulse The quotient is the maximum allowable pulse width the pulse width at the 50 point of the measured signal must be less than this value For example the A6312 Current Probe has a maximum Ampere second product of 100 A us If a pulse measured with an A6312 has a peak current of 40 A the maximum allowable pulse width would be 100 us divided by 40 A or 2 5 us AM 503B amp AM 5030 Amplifier Instruction Manual Reference Notes C Maximum Do Not Exceed Pulsed Pulse Width at 50 5 Pulse Width at 50 50 Maximum Continuous Current a Maximum Allowable Pulse Width b Maximum Allowable Pulse Amplitude Figure 3 3 Applying the Amp Second Product Rule Procedure B To determine the maximum allowable pulse amplitude measure the pulse width at the 50 points see Figure 3 3b Divide the Ampere second or Ampere microsecond specification of your probe by the pulse width The quotient is the maximum allowable current the peak amplitude of the measured pulse must be less than this value For example the A6312 Current Probe has a maximum Ampere
76. ecomes saturated by current overloads or whenever the probe is exposed to a magnetic field The term is derived from one of the units of magnetic flux density electron current flow The flow of the electrons in a conductor Electron current flow is from negative to positive The arrows on current probes point in the opposite direction of electron current flow Electron current flow is in the opposite direction of conventional current flow flux The density of a magnetic field As the number of flux lines increases the magnetic field strength increases Current in the conductor under test generates flux lines in the probe core by inducing a voltage in the core AM 503B amp AM 5030 Amplifier Instruction Manual Glossary 1 Glossary Glossary 2 Hall device A thin rectangular piece of semiconductor material located in the core of the current probe The Hall device uses the Hall effect for DC and low frequency AC measurements Hall effect The effect that produces a voltage potential in the Hall device when magnetic lines of force pass through the device The voltage potential is directly proportional to the the magnetic field strength The voltage polarity is determined by the magnetic field polarity A bias supply is required to produce the Hall effect The AM 503B and AM 5030 current probes use the Hall effect for DC and low frequency AC measurements insertion impedance The equivalent series impedance introduced to a test circuit
77. edures apply to the Amplifier and current probe and do not include test equipment error No probe or Amplifier adjustments are required during these test procedures Should any test fail refer to the troubleshooting section for troubleshooting recommendations Read page 5 1 before starting these procedures Also read each procedure through completely before starting to ensure proper completion Required Test Equipment To perform the acceptance tests in this section you will need the test equipment listed in Table 5 1 The test equipment must meet or exceed the specifications listed The test procedures may need to be modified if the recommended equipment is not used AM 503B amp AM 5030 Amplifier Instruction Manual 5 3 Performance Verification with an A6312 5 4 Table 5 1 Required Test Equipment Recommended Qty Item Description Equipment 1 Oscilloscope 500 MHz bandwidth TDS 520B 1 Current Probe AM503B or AM5030 Amplifier 1 Leveled Sine Wave 3 MHz to 100 MHz Wavetek 9100 with Generator Option 250 or SG 503 equivalent 1 Calibration Generator 1 MHz square wave rise time 1 ns Wavetek 9100 with 1 Vp p into 50 Option 250 or PG 506A equivalent 1 Digital Multimeter 0 25 31 digit resolution DM2510 G or Fluke 850x 884x 1 Current Source 0 396 accuracy 0 to 2 A Fluke 5700A or Wavetek 9100 with Option 250 1 Calibration Fixture 50 BNC Connector 015 0601 50 1 Current Loop 20 turns 27 AWG coated wire
78. efore making connections to the input or output terminals of the product ensure that the product is properly grounded To avoid electric shock or fire hazard do not operate this product with covers or panels removed To avoid electric shock do not operate this product in wet or damp conditions To avoid injury or fire hazard do not operate this product in an explosive atmosphere To avoid injury remove jewelry such as rings watches and other metallic objects Do not touch exposed connections and components when power is present AM 503B amp AM 5030 Amplifier Instruction Manual ix General Safety Summary Product Damage Precautions Use Proper Power Source Use Proper Voltage Setting Provide Proper Ventilation Do Not Operate With Suspected Failures Do not operate this product from a power source that applies more than the voltage specified Before applying power ensure that the line selector is in the proper position for the power source being used To prevent product overheating provide proper ventilation If you suspect there is damage to this product have it inspected by qualified service personnel Safety Terms and Symbols Terms in This Manual A A Terms on the Product These terms may appear in this manual WARNING Warning statements identify conditions or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that c
79. embly ker oe me UR Rs 7 7 Using the Rear Interface Output Connector 7 8 Battery Replacement 7 10 Replaceable Mechanical Parts Replaceable Parts 8 1 Parts Ordering Information 8 1 Using the Replaceable Parts List 8 1 AM 503B amp AM 5030 Amplifier Instruction Manual iii Contents Glossary and Index iv AM 503B amp AM 5030 Amplifier Instruction Manual Contents List of Figures Figure 1 1 Measurement System Figure 1 2 Figure 1 3 Figure 1 4 Configuring the AM 503B and AM 5030 Current TM Series Power Module Voltage Selector Changing the TM 502A Operating Voltage Installing the AM 503B and AM 5030 into the Power Module Figure 1 5 Figure 2 1 Figure 2 2 Figure 2 3 Figure 2 4 Figure 2 5 Figure 2 6 Figure 3 1 Figure 3 2 Figure 3 3 Figure 3 4 Figure 3 5 Figure 3 6 Figure 3 7 Figure 3 8 Figure 3 9 Connecting a Current Probe to the Amplifier A6312 A6302 and A6302XL Slide Operation A6303 A6303XL and A6304XL Slide Operation Current Probe Polarity The AM 503B and AM 5030 Front Panel Stacked GPIB Connectors Typical GPIB Networ
80. emiconductors in the AM 503B and AM 5030 Observe the following precautions m Minimize handling of static sensitive devices m Transport and store static sensitive components or assemblies in their original containers either on a metal surface or conductive foam Label any package that contains static sensitive assemblies or components m Wear a wrist strap while handling these components to discharge the static voltage from your body Servicing static sensitive assemblies or components should be performed only at a static free work station The use of a static control mat is recommended m Clear anything from the work station surface that is capable of generating or holding static charge m Keep component leads shorted together whenever possible m Pick up components by the body never by the leads m Do not slide components over any surface m Avoid handling components in areas that have a floor or a work surface that is capable of generating static charge AM 503B amp AM 5030 Amplifier Instruction Manual 7 3 Disassembly Front Panel Knobs Side Covers To remove the front panel knob simply pull the knob off The shaft will come off with the knob To reinstall the knob align the slotted end of the shaft with the rib inside the knob Push the knob onto the shaft To remove the side covers turn the securing screw 90 counterclockwise and pull the cover off as shown in Figure 7 1 To reassemble reverse the procedu
81. emove the probe from around all conductors or ensure that the conductor under test has no power make sure the probe is locked closed and then press the PROBE DEGAUSS AUTOBALANCE button The probe degauss autobalance routine will not work if the current probe is unlocked or disconnected from the Amplifier input To properly degauss the current probe remove it from the conductor under test and lock the probe If the PROBE DEGAUSS AUTOBALANCE button is pressed while the coupling is set to REF the Output DC level is reset to ground If either AC or DC coupling is selected when the PROBE DEGAUSS AUTOBALANCE button is pressed the DC level is not changed from its previous setting NOTE The Amplifier displays error code 266 when the Amplifier output is not properly terminated into a 50 Q load Make sure your Amplifier OUTPUT is connected to an oscilloscope input using a 50 Q BNC cable and that the oscilloscope input is set to 50 impedance See Figure 1 1 on page 1 2 for proper cabling If your oscilloscope does not have 50 Q impedance settings for inputs you can place a 50 feed through termination on the oscilloscope input and connect the Amplifier output cable to the termination Do not place the feed through termination at the Amplifier end of the BNC connecting cable AM 503B amp AM 5030 Amplifier Instruction Manual 2 9 Control Summary CURRENT DIVISION Buttons COUPLING Button 20 MHz BW LIMIT Button 2 10 P
82. eplaceable Parts 8 3 Figure 8 2 AM 503B amp AM 5030 Standard Accessories 8 6 AM 503B amp AM 5030 Amplifier Instruction Manual Contents List of Tables Table 2 1 Front Panel Commands 2 17 Table 2 2 GPIB Status Commands 2 18 Table 2 3 Amplifier Status Commands 2 18 Table 2 4 Probe Status Commands 2 19 Table 2 5 AM 5030 Event Codes 2 33 Table 3 1 Unpowered Circuit Degauss Limits 3 1 Table 3 2 Automobile Charging Systems Test Setup 3 9 Table 3 3 AM 503B and AM 5030 Front Panel Error Codes 3 18 Table 3 4 Troubleshooting 3 19 Table 4 1 Warranted AM 503B and AM 5030 Specifications 4 2 Table 4 2 Nominal and Typical AM 503B and AM 5030 Characteristics 225 22 ee em RR Re 4 2 Table 4 3 AM 503B and AM 5030 Mechanical Characteristics 4 3 Table 4 4 AM 503B and AM 5030 Environmental Characteristics 4 4 Table 5 1 Required Test Equipment 5 4 Table 5 2 Equipment Settings for Bandwidth 5 5 Table 5 3 Equipment Settings for Rise Time 5 8 Table 5 4 Equipment Settings for DC Gain Accuracy 5 10 Table 5 5 DC Gain Accuracy Test for A6312 5 11 Table 5 6 DC Gain Accuracy Test Worksheet
83. equiring DC Offset Adjustment Error Code Meaning 580 Unable to complete negative offset adjustment 581 Unable to complete positive offset adjustment 7 Remove the probe access plug for the DC Offset adjust see Figure 6 4 10 us DC Offset A6304XL DC Gain Current Probe 1 us Figure 6 4 A6304XL Adjustment Locations 8 Press and hold the 20 MHz BW LIMIT button and while holding it press the PROBE DEGAUSS AUTOBALANCE button This sets the front panel display to 00 and puts the AM 503B and AM 5030 into an internal test mode 9 Press the CURRENT DIVISION button until the front panel display reads 52 10 Press and release the 20 MHz BW LIMIT button The Amplifier will degauss the probe wait until the DEGAUSS light goes out AM 503B amp AM 5030 Amplifier Instruction Manual 6 15 A6304XL Adjustments DC Gain Adjustment AN Equipment Settings Equipment Connections 6 16 11 Adjust the DC Offset control so that the oscilloscope trace is on the center graticule line zero offset 1 division 12 Press and release the 20MHz BW LIMIT button then press and release the COUPLING button This exits the AM 503B and AM 5030 test mode This procedure adjusts the DC gain accuracy of the A6304XL probe CAUTION This test produces magnetic fields that may cause a malfunction in normally operating heart pacemakers or damage sensitive equipment Personnel fitted with pacemakers should not perfor
84. er module N CAUTION To avoid equipment damage turn the TM Series Power Module off before removing or installing any plug in unit AM 503B amp AM 5030 Amplifier Instruction Manual 2 11 Control Summary AM 5030 GPIB Controls SRQ Indicator REMOTE Indicator GPIB ADDRESS Indicator GPIB ADDRESS Button GPIB Terminator 2 12 These indicators and controls are unique to the AM 5030 and do not appear on the AM 503B front panel When lit this indicator informs you that the AM 5030 has requested service from the controller When lit this indicator informs you that the front panel of the AM 5030 is temporarily locked out because the Amplifier is responding to a GPIB command from the controller The GPIB ADDRESS button has a light in it When lit this indicator informs you that the AM 5030 has been addressed by the controller and that communica tion is taking place The GPIB ADDRESS button lets you set the AM 5030 device address The GPIB controller must use this address to send commands to the Amplifier To set the GPIB address press and hold the GPIB ADDRESS button and while holding it down use the and lt gt buttons to adjust the address that is displayed in the CURRENT DIVISION display You can set the address from 0 A00 through 30 A30 You can also set the Amplifier off line which disables all communications with the controller The off line setting is A The GPIB ADDRESS and 20MHz BW LIMIT
85. er test equipment used The recommended calibration interval is one year AM 503B amp AM 5030 Amplifier Instruction Manual 6 1 Adjustment Procedures for Current Probes 6 2 AM 503B amp AM 5030 Amplifier Instruction Manual ere A6312 A6302 and A6302XL Adjustment The following adjustment procedure describes how to adjust the DC offset of the A6312 A6302 and A6302XL Tolerances that are specified in these procedures apply to the current probes and do not include test equipment error Required Test Equipment To perform the adjustment procedure in this section you will need the test equipment listed in Table 6 1 The test equipment must meet or exceed the specifications listed The test procedure may need to be changed if the recom mended equipment is not used Table 6 1 Required Test Equipment Recommended Qty Description Equipment 1 Oscilloscope 150 MHz bandwidth TDS 520B 1 Termination 50 BNC connector 011 0129 00 feedthrough 1 BNC Cable 50 1 05 42 long 012 0057 01 1 Provided as a standard accessory with the 503B and AM 5030 A6312 A6302 and A6302XL DC Offset Adjustment Equipment Connections Figure 6 1 shows the location of the DC offset adjustment in the lower probe half DC Offset CoD Figure 6 1 A6312 A6302 and A6302XL DC Offset Adjustment Location 1 Connect the Amplifier OUTPUT to a 50 oscilloscope input using a 50 Q BNC cable If the inp
86. ery Only Returns a string containing all the individual programming commands required to return the AM 5030 to its present state This string can be saved and sent at some future time when you want to return the AM 5030 to all the present settings Because this string is intended to be sent back to the AM 5030 the return string contains command headers names regardless of the setting of the PATH command Syntax SET Returns AMPS lt number gt BWLIMIT lt OFF ON gt COUPLING lt AC DC REF DCLEVEL number FPLOCK ON OFF gt PATH lt ON OFF gt PROBETRIM lt number gt RQS lt ON OFF gt Examples SET might return AMPS 1 0 BWLIMIT OFF COUPLING DC DCLEVEL 0 5 FPLOCK OFF PATH ON PROBETRIM 1 000 RQS 2 30 AM 503B amp AM 5030 Amplifier Instruction Manual Commands TEST No Query Form Syntax Returns Examples UNIts Query Only Syntax Returns Examples Instructs the AM 5030 to perform a self test operation and return the error code of the first error that occurs If no error occurs TEST will return 0 TEST number TEST might return TEST 0 indicating that the self test completed successfully with no errors TEST might return TEST 357 low battery Returns the output units of the AM 5030 Normally these will be amperes whenever a current probe is connected to the AM 5030 OUTPUT Whenever a voltage adapter or loop through adapter is connected both are calibra
87. es Amplifier needs repair 363 364 Amplifier or probe needs repair 400 No AM 5030 function normal no events to report 401 No Power on has occurred 450 No Degauss autobalance complete 550 594 Error occurred during internal automatic adjustment Repeated errors in the range 550 594 indicate the Amplifier needs repair 580 and 581 indicate that the Amplifier was unable to complete a probe offset adjustment See the DC Offset Adjustment procedure for the particular probe you are using 650 Timer indicates too long since last degauss probe should be degaussed PROBE DEGAUSS AUTOBALANCE light will blink until probe degaussed 651 Probe overload occurred probe should be degaussed PROBE DEGAUSS AUTOBALANCE light will blink until probe degaussed 652 653 The automatic Hall device biasing circuit is at the end of its compensation range probe should be degaussed PROBE DEGAUSS AUTOBALANCE light will blink until probe degaussed 2 34 AM 503B amp AM 5030 Amplifier Instruction Manual Reference Reference Notes These notes are provided to help you realize the full potential of the AM 503B and AM 5030 current probe systems Degaussing a Probe with an Unpowered Conductor in the Jaws Under almost all conditions you can degauss your current probe while a conductor of an unpowered circuit is clamped in the jaws The advantage of degaussing with an unpowered circuit is that any offset from stray DC magnetic fields are compensated
88. et the GPIB address press and hold the GPIB ADDRESS button and while holding it down use the amp and lt gt buttons to adjust the address that is displayed in the digits You can set the address from 0 A00 through 30 A30 You can also set the AM 5030 off line which disables all communications with the controller The off line setting is A AM 503B amp AM 5030 Amplifier Instruction Manual GPIB Operation GPIB Terminator Pressing both the GPIB ADDRESS and 20MHz BW LIMIT buttons at the same time lets you set the AM 5030 GPIB terminator The terminator may be set to EOI only or EOI followed by LE You will need to consult your controller documentation to determine which setting is best for your configuration To set the GPIB terminator press and hold both the GPIB ADDRESS and 20MHz BW LIMIT buttons and while holding them down use the and amp buttons to adjust the setting that is displayed in the digits The display shows EOI when the terminator is EOI only and LF when the terminator is EOI followed by LF Other Documents You Will Need We cannot know what type of controller you will use with your AM 5030 This document cannot cover the topics that are specific to your installation To completely understand and implement a GPIB system you will need the documentation that supports your controller If you are using a personal computer with a GPIB card you will need the documentation for both the PC and the GPIB card
89. g against the battery terminal Excessive force can damage the spring tension of the terminal resulting in poor battery contact or no contact at all Flat Blade Screwdriver Terminal Battery Figure 7 9 Prying Battery Terminal to Remove Battery 2 Once the battery starts to slide out push against the edge of the battery with the screwdriver blade until the battery is completely out Figure 7 10 illustrates this action Figure 7 10 Removing the Backup Battery AM 503B amp AM 5030 Amplifier Instruction Manual Disassembly 3 To replace the battery gently pry up on the battery terminal as shown in Figure 7 11 and push the battery into place exposed on top Improper polarity can damage the instrument CAUTION Observe the proper polarity for the battery The side should be Gently pry the terminal up with the screwdriver and push the battery in Figure 7 11 Replacing the Backup Battery AM 503B amp AM 5030 Amplifier Instruction Manual 7 11 Disassembly 7 12 AM 503B amp AM 5030 Amplifier Instruction Manual Pi Replaceable Mechanical Parts E ae 8 Replaceable Parts This section contains a list of the components that are replaceable for the AM 503B and AM 5030 As described below use these lists to identify and order replacement parts Parts Ordering Information Replacement parts are available from or through your local Tektronix Inc
90. gnals The AM 503B and AM 5030 provide these features m Simultaneous DC and AC current measurements m High sensitivity m One button autobalancing and probe degaussing m No adjustments needed to match a current probe to an individual amplifier except for the A6303 current probe W Probe trim adjust allows fine tuning of gain for increased accuracy The AM 5030 provides an additional feature m Programmable control from a GPIB controller To help you get the best performance from your Amplifier Tektronix offers the following customer support services If you need assistance operating your amplifier system please call our Customer Support Center at 1 800 TEK WIDE 1 800 835 9433 extension 2400 If you are outside the United States or Canada please contact your nearest Tektronix Service Center Should your Amplifier system need repair beyond that described in this manual please contact your nearest Tektronix Service Center AM 503B amp AM 5030 Amplifier Instruction Manual 1 1 Getting Started Sales Support To order optional equipment and accessories call the Tektronix National Marketing Center at 1 800 426 2200 If you are outside the United States or Canada please contact your nearest Tektronix Service Center AM 503B and AM 5030 System Configuration AM 503B amp AM 5030 Current Probe Amplifier Current Probes A complete AM 503B or AM 5030 current measurement system consists of a current probe ampl
91. graticule line NOTE Once the first two steps have been completed no further adjustments are required on the oscilloscope vertical amplifier during the measurement session Use the Amplifier controls for everything but time base and trigger adjustment AM 503B amp AM 5030 Amplifier Instruction Manual Measurements 3 Lock the probe closed without a conductor passing through it Press the Amplifier COUPLING button repeatedly until the REF light comes on and then press the Amplifier PROBE DEGAUSS AUTOBALANCE button 4 After the degauss autobalance routine completes adjust the ground reference if necessary using the Amplifier OUTPUT DC LEVEL control 5 Open the probe slide place the probe around the conductor under test and then lock the slide For correct measurement polarity make sure the probe arrow is pointing in the direction of conventional positive to negative current flow Reversing the flow will invert the displayed current waveform on the oscilloscope 6 Press the Amplifier COUPLING button repeatedly until the AC light comes on Set the Amplifier CURRENT DIVISION to the desired setting using the and amp buttons NOTE Even when making AC current measurements leave the oscilloscope coupling on DC Change only the Amplifier coupling to AC Using the oscillo scope AC coupling may cause the Amplifier to exceed its output dynamic range 7 If necessary vertically position the resulting waveform us
92. guments Examples Syntax Arguments Examples Sets or queries the 20 MHz bandwidth limit switch BWLIMit ON BWLIMit OFF BWLIMit ON turns bandwidth limiting on OFF turns bandwidth limiting off BWLIM ON turns on bandwidth limiting BWLIM might return BWLIMIT OFF indicating that bandwidth limiting is off Sets or queries the input coupling of the AM 5030 COUpling AC COUpling DC COUpling REF COUp1 ing AC sets the input to AC coupling DC sets the input to DC coupling REF sets the input to ground reference COU DC sets the AM 5030 input to DC coupling COU might return COUPLING REF indicating that the AM 5030 input is set to ground reference AM 503B amp AM 5030 Amplifier Instruction Manual Commands DCLEVel Syntax Arguments Examples Sets the DC offset level of the AM 5030 This is the current level that will be displayed at the oscilloscope ground reference level This programming command is the most accurate means to set the DC offset level the front panel OUTPUT DC LEVEL control is less precise DCLEVel lt number gt DCLEVel lt Number gt specifies the offset in amperes The value may range 10 times the sensitivity AMPS setting For example if the current AMPS setting is 1 A div the valid range of the DCLEVel is from 10 A to 10 A DCLEV 0 1 sets the DC offset level to 0 1 A DCLEV might return 1 indicating that the DC offset level is currently 1 A DEGAuss No
93. h the probe The AM 503B and AM 5030 have few customer serviceable parts and should be returned to a Tektronix Service Center in the event of failure Some mechanical and electrical parts may be replaced by the customer This section describes the preventive maintenance and repair procedures Preventive Maintenance The AM 503B and AM 5030 Current Probe Amplifiers and current probes require little maintenance during normal use The primary maintenance involves cleaning accumulated dirt from the probe body and if necessary cleaning the exposed core surfaces in the probe jaw To clean the probe body use a soft cloth dampened in a solution of mild detergent and water To clean the core open the jaw and clean the exposed core surfaces with a cloth CAUTION Avoid using chemical cleaning agents that damage plastic For example avoid using chemicals that contain benzene toluene xylene acetone or similar solvents Recommended cleaning agents are isopropyl alcohol Isopropanol or ethyl alcohol Fotocol or Ethanol AM 503B amp AM 5030 Amplifier Instruction Manual 7 1 Customer Maintenance 7 2 AM 503B amp AM 5030 Amplifier Instruction Manual E Disassembly Use these procedures when repairing or replacing defective components For disassembly instructions pertaining to the TM Series Power Module refer to that Instruction Manual Static Device Precautions CAUTION Static discharge can damage s
94. he specified electrical limits of the AM 503B and AM 5030 or any applicable accessories When pressed this button performs two functions that maximize measurement accuracy First the Amplifier generates a degauss signal to remove any residual magnetism from the attached current probe Second the Amplifier initiates an operation to remove any undesired DC offsets from its circuitry During the degauss process the Amplifier is busy and cannot be used to measure current AM 503B amp AM 5030 Amplifier Instruction Manual Control Summary The indicator light in the PROBE DEGAUSS AUTOBALANCE button will blink whenever the Amplifier detects that the current probe needs degaussing or DC balancing The Amplifier cannot detect all circumstances that require probe degaussing so you may need to degauss the probe at times when the PROBE DEGAUSS AUTOBALANCE light is not blinking The blinking light serves as a reminder to degauss the current probe when one of the following conditions occurs m The Amplifier has just been turned on with a current probe connected W The current probe has been changed m The internal temperature of the Amplifier changed by more than 10 C m An overload has occurred The indicator stays on steady during the time the Amplifier is busy performing the probe degauss functions When the degauss and autobalance procedure is complete the indicator light turns off To perform the probe degauss autobalance function r
95. heck 5 40 dc offset adjustment 6 14 performance verification 5 37 rise time check 5 38 transient response adjustment 6 18 A6312 adjustments 6 3 bandwidth check 5 5 dc accuracy check 5 9 dc offset adjustment 6 3 performance verification 5 3 rise time check 5 7 AC coupling 2 4 2 10 3 3 adjustments degauss 2 3 oscilloscope 1 7 7 8 ALLEve command 2 21 amp second product 3 4 Glossary 1 AMPS Command 2 21 applications 3 9 auto balance Glossary 1 autobalance function 2 8 AM 503B amp AM 5030 Amplifier Instruction Manual bandwidth limits 2 10 3 2 battery low indicator 3 19 replacement 7 10 bucking current 3 6 Glossary 1 BWLIMit Command 2 22 C cable IEEE Std 488 1 1987 2 13 stacking GPIB 2 13 changing the operating voltage 1 4 cleaning 7 1 commands ALLEve 2 21 AMPS 2 21 BWLIMit 2 22 COUpling 2 22 DCLEVel 2 23 DEGAuss 2 23 ERRor 2 24 EVent 2 24 EXit 2 24 FPLock 2 25 HELp 2 25 ID 2 26 INIT 2 26 OVerload 2 26 PATH 2 27 2 27 PROBETRim 2 28 2 29 RQS 2 29 SERIAL 2 30 SET 2 30 TEST 2 31 UNIts 2 31 computer See controller GPIB connector IEEE Std 488 1 1987 2 13 continuity measurements 3 14 control summary 2 7 controller GPIB 2 13 conventional current Glossary 1 See also electron current COUPLING button 2 10 COUpling Command 2 22 Index 1 Index
96. idth Refer to Table 4 1 on page 4 2 7 Using the peak peak measurement capability of the oscilloscope measure and record the peak peak reading as M 8 The probe meets the bandwidth specification if the ratio of the signal amplitude at the warranted bandwidth is at least 70 7 of the signal amplitude at 3 MHz Using the following calculation verify probe band width M s 0 707 AM 503B amp AM 5030 Amplifier Instruction Manual Performance Verification with an A6312 Rise Time Equipment Connections NOTE The impedance of the calibration fixture used in this test changes between 3 MHz and 100 MHz Typically the impedance changes from 50 Q at 3 MHz to 59 Q at 100 MHz Thus you can substitute the following equation to make this test more accurate M aas e 0 707 This procedure measures the rise time of the A6312 In this test you directly measure the rise time of a step input Refer to Figure 5 2 when making equipment connections Amplifier in T Calibrati Series Power Test Oscilloscope Module Generator Current P robe Output Fast Rise 50 Q Input Calibration Fixture Figure 5 2 Rise Time Test Setup for A6312 1 Using a 50 BNC cable connect the Amplifier OUTPUT to a 50 oscilloscope input If the input impedance of your oscilloscope is 1 MQ connect a 50 feedthrough termination at the oscilloscope input Do not
97. ient Response and Gain Adjustment This procedure describes how to optimize the transient response and gain of the A6303 and A6303XL using adjustments HF1 HF2 and HF3 Refer to figures 6 2 6 3 when performing this procedure Equipment Connections 6 10 NOTE The A6303XL has only a single adjustment located at the HF2 position 1 Connect the calibration generator output to a 50 Q oscilloscope input using a 50 Q BNC cable If the input impedance of your oscilloscope is 1 MQ connect 50 feedthrough termination to the oscilloscope input Do not connect the termination to the calibration generator output Connect the current probe to the Amplifier INPUT connector AM 503B amp AM 5030 Amplifier Instruction Manual A6303 and A6303XL Adjustments m Calibration Amplifier in T Generator Series Power Test Oscilloscope Module High Amplitude Output 50 Q Input A6303 A6303XL Probe Current Loop Figure 6 3 A6303 and A6303XL Adjustment Setup Equipment Settings or verify the equipment settings in Table 6 7 Table 6 7 Settings for Transient Response and Gain Adjustments AM 503B and AM 5030 Coupling DC BW Limit Off full bandwidth Current division 20 mA division Oscilloscope Vertical Gain 1 V division Time Base 100 us division Auto triggered Input Coupling Ground Calibration Ge
98. ier for a zero reading on the DMM 4 Clamp the current probe around the current loop See Figure 6 5 Check that the arrow shaped indicator on the probe points away from the current source 5 Adjust the current output of the power supply to 200 mA 6 The DMM reading should be 50 mV If you could not set your current source to exactly 200 mA use the formula below current source reading X 250 turns DMM voltage reading X I0 mV division 10 Amps division 7 If the reading is not correct adjust DC GAIN on the A6304XL for a correct reading on the DMM See Figure 6 4 on page 6 15 AM 503B amp AM 5030 Amplifier Instruction Manual 6 17 A6304XL Adjustments A6304XL Transient Response Adjustment Equipment Connections Equipment Settings 6 18 This procedure describes how to optimize the transient response of the A6304XL using the 10 us and 1 us adjustments Refer to figures 6 4 and 6 6 when performing this procedure 1 Connect the Amplifier output to a 50 Q oscilloscope input using a 50 Q BNC cable If the input impedance of your oscilloscope is 1 MQ connect a 50 Q feedthrough termination to the oscilloscope input 2 Connect the current probe to the Amplifier INPUT connector Test Oscilloscope 50 Q Input Amplifier in T Series Powe Module r Figure 6 6 A6304XL Adjustment Setup Calibration Generator Current
99. ifier a compatible current probe a TM 500 or TM 5000 series power module and an appropriate oscilloscope Refer to Figure 1 1 Amplifier in TM Series Power Module Test Oscilloscope Current P robe 50 Q oscilloscope input or add 500 termination here if oscilloscope has only high impedance input Figure 1 1 Configuring the AM 503B and AM 5030 Current Measurement System The AM 503B is a single width instrument that plugs into any Tektronix TM 500 or TM 5000 series power module The AM 5030 is a single width instrument that plugs into any Tektronix TM 5000 series power module The Amplifier amplifies the current sensed by the probe and converts the current to a proportional voltage that is displayed on an oscilloscope or other similar measuring device The AM 503B and AM 5030 systems may be used with the following Tektronix probes m A6312 20 amps m 6302 and A6302XL 20 amps m A6303 and A6303XL 100 amps A6304XL 500 amps You can also use the CT 4 High Current Transformer with the A6312 A6302 and A6302XL current probes to extend their AC current measurement range to 20 000 peak amps AM 503B amp AM 5030 Amplifier Instruction Manual Getting Started TM 500 Series Power Modules TM 5000 Series Power Module Oscilloscope Standard Accessories Optional Accessories The AM 503B operates in a Tektronix TM 500 or
100. ility of the oscilloscope measure and record the peak peak reading as 6 Setthe oscilloscope time base to 10 ns division Increase the signal generator frequency to the warranted bandwidth Refer to Table 4 1 on page 4 2 7 Using the peak peak measurement capability of the oscilloscope measure and record the peak peak reading as 8 The probe meets the bandwidth specification if the ratio of the signal amplitude at the warranted bandwidth is at least 70 7 of the signal amplitude at 3 MHz Using the following calculation verify probe band width M s 0 707 AM 503B amp AM 5030 Amplifier Instruction Manual Performance Verification with an A6302 or A6302XL Rise Time Equipment Connections NOTE The impedance of the calibration fixture used in this test changes slightly between 3 MHz and 50 MHz Typically the impedance changes from 50 Q at 3 MHz to 53 Q at 50 MHz Thus you can substitute the following equation to make this test more accurate M 1 06 s 0 707 This procedure measures the rise time of the A6302 and A6302XL In this test you directly measure the rise time of a step input Refer to Figure 5 5 when making equipment connections Amplifier in T Calibrati Series Power alprauen Test Oscilloscope Module Generator Current P robe Output Fast Rise 50 Q Input Calibration Fixture Figure 5 5 Rise Time Test Setup for A
101. imits of your current probe N Measuring frequencies in excess of the specified limit can cause the probe to overheat severely resulting in personal injury or damage to the equipment Refer to the probe Instructions for frequency derating Measuring Differential Current You can place two conductors in a current probe to provide differential or null current measurement This avoids the necessity of using two current measure ment systems with a differential oscilloscope amplifier 1 Orient the two conductors under test so that the polarities oppose each other Clamp the current probe around the two conductors as shown in Figure 3 1 2 Measure the current A waveform above the baseline indicates the conductor with the conventional current flow in the direction of the probe arrow is carrying the greater current Conventional current flows from positive to negative 3 To adjust for a current null adjust the current in one of the conductors until the displayed measurement is zero Conductor 2 Conductor 1 Sh Current Probe Figure 3 1 Measuring Differential Current and Nulls 3 2 AM 503B amp AM 5030 Amplifier Instruction Manual Reference Notes AC and DC Coupling You can couple the signal input to the AM 503B and AM 5030 with either DC or AC coupling DC coupling shows the DC and AC measurement components while AC coupling removes the DC component from the displayed signal When you use AC
102. indicating that the probe trim adjustment is currently set to 1 1 for probes of the type of probe currently connected to the AM 5030 AM 503B amp AM 5030 Amplifier Instruction Manual Commands PROBETYpe Query Only Returns the type model of current probe connected to the AM 5030 INPUT connector The return string NOPROBE indicates that no current probe is connected Syntax PROBETYpe Returns PROBETYPE A6302 PROBETYPE A6303 PROBETYPE A6302XL PROBETYPE A6303XL PROBETYPE A6304XL PROBETYPE NOPROBE Examples PROBETY might return PROBETYPE A6303 indicating that a A6303 Current Probe is attached to the INPUT connector of the AM 5030 NOTE The PROBETY query returns PROBETYPE A6302 for both A6302 and A6312 current probes RQS Enables or disables SRQs System Requests When disabled the AM 5030 does not act on error conditions other than to log them and does not signal that it is ready to transmit data to the controller Syntax RQS ON RQS OFF RQS Arguments ON enables SRQ events Off disables SRQ events Examples RQSON enables SRQ events AM 503B amp AM 5030 Amplifier Instruction Manual 2 29 Commands SERIAL Query Only Returns the serial number of the AM 5030 Syntax SERIAL Returns The instrument serial number as an ASCII string The serial number is an eight digit string always starting with a space ASCII 32 character Examples SERIAL might return SERIAL 018607 SET Qu
103. ing the OUTPUT DC LEVEL knob of the Amplifier 8 Adjust the oscilloscope time base and trigger as needed AM 503B amp AM 5030 Amplifier Instruction Manual 2 5 Measurements 2 6 AM 503B amp AM 5030 Amplifier Instruction Manual EEE Control Summary This section describes the function of each AM 503B and AM 5030 front panel control and connector The overview in Figure 2 4 is followed by a detailed description Some seldom used functions do not appear in Figure 2 4 These functions are completely discussed in the detailed descriptions that follow Figure 2 4 The OUTPUT DC LEVEL knob vertically positions the signal on the oscilloscope screen The CURRENT DIVISION display shows the currentAM 503B and AM 5030 scale factor in either mA division or A division Error codes and output DC level also appear here The 20 MHz BW LIMIT button alternately selects or deselects the 20 MHz bandwidth limit for noise filtering Hold down the GPIB ADDRESS button while adjusting the CURRENT DIVISION buttons to change the GPIB address AM 5030 only The AM 503B and AM 5030 output appears at the OUTPUT connector Connect this to a 50 Q input of your oscilloscope Pull the release lever to remove the AM 503B and AM 5030 from the power module OUTPUT DC LEVEL PROBE OPEN PROBE DEGAUSS ALITORAIL ANCE CURRENT DIVISION OVER LOAD SRQ REMOTE
104. into 50 Q Verify that the oscilloscope input is 50 and set to DC coupling If necessary use a 50 Q termination at the oscilloscope input 6 Lock the jaws of the probe around the calibrator current loop 7 Adjust the oscilloscope to view the 100 us portion of the pulse 8 Adjust the calibration generator to produce an amplitude of five graticule divisions 5 amps at the 100 us portion of the pulse NOTE Do not adjust the calibration generator amplitude for the remainder of this procedure 9 Adjust the 10 us control for a flat waveform to match the level at the 100 us point 10 Adjust the oscilloscope sweep to 1 us div AM 503B amp AM 5030 Amplifier Instruction Manual 6 19 A6304XL Adjustments 11 Adjust the 1 us control to flatten the front end of the pulse NOTE The 10 us and 1 us adjustments on the A6304XL interact Adjusting them can be a repetitive process You may need to balance between short and long term response in order to meet both specifications at once 12 Disconnect the probe from the calibration generator current loop 13 Verify the DC Gain Accuracy using the procedure on page 6 16 6 20 AM 503B amp AM 5030 Amplifier Instruction Manual Er Maintenance Customer Maintenance Service Strategy This manual supports maintenance of the AM 503B and AM 5030 only For detailed information on servicing the current probes refer to the Instructions provided wit
105. justment refer to the Adjustment Procedure on page 6 1 or contact your nearest Tektronix Service Center The adjustment procedure should be performed only by qualified service personnel AM 503B amp AM 5030 Amplifier Instruction Manual SD Operating Basics Measurements This section provides operating techniques and measurement procedures for using the AM 503B and AM 5030 compatible current probes Operating the Current Probe Slide The current probes each have a slide mechanism that opens and closes the probe jaw This allows you to clamp the probe around a conductor under test The slide must be locked closed to accurately measure current or to degauss the probe If a probe is unlocked the PROBE OPEN indicator on the Amplifier will light WARNING When the probe slides are open the exposed ferrite core pieces are not insulated To avoid injury or equipment damage remove power from an uninsulated wire before clamping the current probe around it Figure 2 1 illustrates the slide operation of the A6312 A6302 and A6302XL current probes To open the probe pull the slide back until the jaw is open To lock the probe push the slide forward until the detent snaps into place Probe Open Probe Locked p Figure 2 1 A6312 A6302 and A6302XL Slide Operation Figure 2 2 illustrates the slide operation of the A6303 A6303XL and A6304XL current probes To open the probe press the bottom of the lock but
106. k Configurations Measuring Differential Current and Nulls Effect of AC or DC Coupling on Low Frequency Signals Applying the Amp Second Product Rule Increasing the DC Measurement Range Increasing Probe Sensitivity Setup for Measuring Charging Current Charge Current Waveforms Measuring Inductance with Low Impedance Source Linear Current vs Time Ramp Figure 3 10 Measuring Inductance with a High Impedance Source Figure 3 11 High Impedance Source Current Ramp Figure 3 12 Measuring the Number of Turns in a Coil Figure 3 13 Turns Measurement Using Reference Coil Figure 5 1 Figure 5 2 Figure 5 3 Figure 5 4 Figure 5 5 Figure 5 6 Figure 5 7 Bandwidth Test Setup for 6312 Rise Time Test Setup for A6312 DC Gain Accuracy Test Setup for A6312 Bandwidth Test Setup for A6302 A6302XL Rise Time Test Setup for A6302 A6302XL DC Gain Accuracy Test Setup for A6302 A6302XL Bandwidth Test Setup for an A6303 A6303XL AM 503B amp AM 5030 Amplifier Instruction Manual 1 2 1 4 1 5 1 6 1 8 2 1 2 2 2 4 2 13 2 14 3 2 3 3 3 5 3 6 3 7 3 10 3 10 3 11 3 12 3 13 3 13 3 14 3 15 5 5 5 7 5 10 5 17 5 19 5 22 5 28 Contents vi Figure 5 8 Rise Time Test Setup for A
107. la 0 01 X current division AM 503B amp AM 5030 Amplifier Instruction Manual 5 11 Performance Verification with an A6312 5 12 For example you might have obtained values of 50 mV for M and 48 mV for M If you are using an Amplifier setting of 10 mA division you can compute ln as i 50 0 103 48x10 3 m 0 01 X 10 10 98 mA Verify that the measured current Zm is within 3 of the test current by computing Error as follows Lo A 7 8100 Error For example using a test current J of 100 mA and a measured current Im of 98 mA the Error would be 98 100 Error 100 x 100 2 AM 503B amp AM 5030 Amplifier Instruction Manual Performance Verification with an A6312 Table 5 6 DC Gain Accuracy Test Worksheet for A6312 Turns of Current AM 503B and Loop Passing AM 5030 Current Source Test Current Im Error Through Probe Current Division Output Note A Note B 20 1 mA 20 2 mA 20 5 20 10 mA 20 20 mA 20 50 mA 20 100 mA 20 200 mA 20 500 mA 20 1A 20 2A 20 5A ee TL X current division Note B I I Error NE x 100 AM 503B amp AM 5030 Amplifier Instruction Manual 5 13 Performance Verification with an A6312 5 14 503 amp AM 5030 Amplifier Instruction Manual Performance Verification with an A6302 or A6302XL The test procedures in this section verify
108. lat spot of the front panel hole and push the connector into the front panel Perform steps 1 through 3 in reverse order Q E BNC Connector Washer Panel Output Cable Nut with Peltola 5 Connector 9 Shield Plate SUR Figure 7 6 Removing the Amplifier Output Connector Slide the shield plate and input connector assembly down and lift it out of the way Unsnap the three retaining clips holding the front panel circuit board in place and lift the board out of the panel To reassemble reverse this procedure AM 503B amp AM 5030 Amplifier Instruction Manual 7 7 Disassembly Nut Washer Figure 7 7 Removing the Amplifier Front Panel Board Using the Rear Interface Output Connector Some Power Modules support an option to reroute the plug in instrument output to the rear interface of the power module refer to the Tektronix catalog or contact your Tektronix sales representative You can configure the AM 503B and AM 5030 for this type of power module by following these steps Refer to Figure 7 8 as necessary NOTE If you use the power module rear interface connector high frequency performance may be degraded depending on your system configuration If high frequency performance is critical route a BNC cable from the front panel OUTPUT connector to your system 1 Remove the left side cover 2 Locate the output cable with the Peltola connecto
109. m this test and should stay at least 10 feet from the current loop while the test is being conducted Make or check the equipment settings in Table 6 11 Table 6 11 Equipment Settings for DC Gain Accuracy Digital Multimeter Measurement Type DC volts Current Source Output Off AM 503B and AM 5030 Coupling DC BW Limit On Current division 10 A division Probe Trim 000 1 Using a BNC cable connect the Amplifier OUTPUT to a 50 Q feedthrough termination Attach the termination to a BNC to dual banana adapter Taking care to observe the adapter polarity insert the dual banana adapter into the digital multimeter DC voltage input 2 Connect the current loop to the current source as shown in Figure 6 5 AM 503B amp AM 5030 Amplifier Instruction Manual A6304XL Adjustments Amplifier in T Series Power Module Current Source BNC to Dual Banana Adapter 50 Termination 50 O Coaxial Cable Current Flow Figure 6 5 DC Gain Accuracy Adjustment Setup Procedure 1 Do not clamp the current probe around any conductor but make sure the jaws are locked shut 2 Pressthe Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalance routine to complete before proceeding The routine is complete when the indicator light turns off 3 If necessary adjust DC LEVEL the amplif
110. me base to 100 us division 10 Reset the period of the calibration generator to 1 ms 11 Remove the probe access plugs for HF1 HF2 and HF3 Remove the HF2 plug only for the A6303 see Figure 6 2 on page 6 8 12 Adjust the probe for optimum performance m A6303 Adjust HF1 HF2 and for an oscilloscope display of five divisions and optimum transient response m A6303XL Adjust only HF2 for an oscilloscope display of five divisions and optimum transient response The A6303XL does not have controls in the HF1 and HF3 positions NOTE The HF1 HF2 and HF3 adjustments on the A6303 interact Adjusting them can be a repetitive process You may need to balance between transient response and gain in order to meet both specifications at once AM 503B amp AM 5030 Amplifier Instruction Manual eS A6304XL Adjustments Each of the following adjustment procedures describes how to adjust specific performance characteristics of the A6304XL Tolerances that are specified in these procedures apply to the current probe and do not include test equipment error Required Test Equipment To perform the adjustment procedures in this section you will need the test equipment listed in Table 6 8 The test equipment must meet or exceed the specifications listed The test procedures may need to be changed if Tektronix equipment is not used Perform the steps on page 6 1 before starting these procedures
111. necting a Current Probe to the Amplifier 1 8 Operating Basics Measur ments u oeeie e an nel 2 1 Operating the Current Probe Slide 2 1 Degaussing and Autobalancing the Current Probe 2 2 Measurements hae ad ec i RR wage RR qe cs 2 3 Measurements i cerir hx da x ede Re RAGE ao pe 2 4 Control Summary seeiis er de e mm n re le e Ree og 2 7 AM 503B and 5030 Controls 2 8 AM 5030 GPIB Controls 2 12 GPIB Op ration ss eere ee mter He RETE 0 6 2 13 GPIB Requirements ur SU e ec 2 14 Setting the GPIB Parameters 2 14 Other Documents You Will Need 2 15 Functional Command Groups 2 17 Front Panel Commands 2 17 GPIB Status Commands 2 18 Amplifier Status Commands 2 18 Probe Status Commands 2 19 Commands Era ri ene a See aca ien 2 21 ALLEve Query Only 2 21 AMPS IURIS GUAE ARES ALTO Run gas 2 21 BWEIMIt op Monn
112. nerator Period 0 1 ms Function High amplitude Procedure 1 Move the oscilloscope trace up one graticule line from the bottom of the screen 2 Change the oscilloscope input coupling to DC 3 Do not clamp the current probe around any conductor but make sure the jaws are locked shut AM 503B amp AM 5030 Amplifier Instruction Manual 6 11 A6303 and A6303XL Adjustments 6 12 4 Press the Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalance routine to complete before proceeding The routine is complete when the indicator light turns off NOTE The Amplifier front panel will display error code 266 after the degauss autobalance routine completes if the Amplifier is not properly terminated into 50 Q Verify that the oscilloscope input is 50 Q and set to DC coupling If necessary use a 50 Q termination at the oscilloscope input 5 Adjust the calibration generator to produce an amplitude of five graticule divisions 5 volts NOTE Do not adjust the calibration generator amplitude for the remainder of this procedure 6 Disconnect the BNC cable from the calibration generator and attach it to the Amplifier OUTPUT connector see Figure 6 3 on page 6 11 7 Attach the current loop to the probe and lock the probe 8 Connect the current loop to the calibration generator output using another coaxial cable 9 Resetthe vertical gain of the oscilloscope to 10 mV division and the ti
113. not locked Current Probe is improperly connected to the Amplifier input Amplifier output is not terminated into 50 load Set input impedance of oscilloscope to 50 Q or connect a 50 feed through termination at the oscilloscope input not at the Amplifier output The Amplifier output is not terminated into 50 load Set the input impedance of oscilloscope to 50 or connect a 50 feedthrough termination see the replaceable parts list at the oscilloscope input Do not attach the termination to Amplifier output The measurement exceeds the maximum continuous current or Ampere second product ratings of the Current Probe For more information see Current Limits on page 3 4 If possible upgrade to a probe with a higher current rating or use a CT 4 transformer The Amplifier output is not terminated into 50 load Set the input impedance of oscilloscope to 50 or connect a 50 feedthrough termination see the replaceable parts list at the oscilloscope input Do not attach the termination to Amplifier output The measurement exceeds the Ampere second product of the Current P robe If possible upgrade to a probe with a higher current rating or use a CT 4 transformer Bandwidth limit is turned on Verify that bandwidth limit switches of both the Amplifier and the oscilloscope are set to the full bandwidth position 3 20 AM 503B amp AM 5030 Amplifier Instruction Manual gt MEM SM Specifications Specific
114. ns 1 Using a BNC cable connect the Amplifier OUTPUT to the 50 Q feed through termination Attach the termination to a BNC to dual banana adapter Taking care to observe and maintain polarity insert the dual banana adapter into the digital multimeter DC voltage input 2 Connect the current loop to the current source as shown in Figure 5 6 AM 503B amp AM 5030 Amplifier Instruction Manual 5 21 Performance Verification with an A6302 or A6302XL 5 22 Equipment Settings Procedure Banana Adapter pri 50 Termination Amplifier in T Series Power Module Current DMM Source 20 Turns BNC to Dual Current Flow 50 Cable Figure 5 6 DC Gain Accuracy Test Setup for A6302 A6302XL Make or verify the equipment settings in Table 5 10 Table 5 10 Equipment Settings for DC Gain Accuracy Digital Multimeter Measurement Type DC volts Range Autoranging Current Source Output Off AM 503B and AM 5030 Coupling DC BW Limit On 20 MHz Current division 1 mA division Probe Trim 000 1 Do not clamp the current probe around any conductor but make sure the jaws are locked shut Press the Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalance routine to complete before proceeding The routine is complete when the indicator light tu
115. nt code EV might return 266 as the most recent error code Causes the AM 5030 to exit a test mode or recover from an error condition EXit AM 503B amp AM 5030 Amplifier Instruction Manual Commands FPLock Enables and disables the front panel buttons When locked the AM 5030 front panel buttons and knob are completely inoperative Syntax FPLock ON FPLock OFF FPLock Arguments ON turns on the front panel lock which disables buttons and knob OFF restores operation of the buttons and knob Examples FPL OFF restores the operation of the front panel buttons and knob FPL might return ON indicating that the front panel buttons and knob are inoperative because they are locked HELp Query Only Returns a list of commands that are recognized by the AM 5030 Syntax 1 Returns Will always return the string HELP ALLEVE AMPS BWLIMIT COUPLING DCLEVEL DEGAUSS ERROR EVENT EXIT FPLOCK HELP ID INIT OVERLOAD PATH PROBEOPEN PROBETRIM PROBETYPE RQS SERIAL SET TEST UNITS AM 503B amp AM 5030 Amplifier Instruction Manual 2 25 Commands ID Query Only Returns the AM 5030 identification including the name Codes amp Formats version main board firmware version and GPIB board firmware version Syntax 10 Returns The instrument identification string Examples ID may return the string ID TEK AM 5030 V81 1 MAIN 1 0 GPIB 1 0 INIT No Query Form Initializes the AM 5030 to factory def
116. o utilize the full bandwidth capability of the AM 503B and AM 5030 and attached current probe the oscilloscope bandwidth should be approximately five times that of the current probe For example when using an A6312 Current Probe the oscilloscope bandwidth should be at least 500 MHz When using an A6302 Current Probe the oscilloscope bandwidth should be at least 250 MHz After you have connected the Amplifier to the oscilloscope make the following adjustments to the oscilloscope channel you are using Perform these adjust ments only after all equipment has warmed up to a stable temperature usually 20 minutes are required 1 Make sure the oscilloscope input impedance is 50 Q If your oscilloscope provides only 1 MQ inputs you need to attach a 50 Q feedthrough termination between the oscilloscope input and the BNC cable Do not install this termination at the AM 503B and AM 5030 end of the BNC cable 2 Setthe vertical gain of the oscilloscope to 10 mV div 3 Setthe oscilloscope ground reference so the trace appears at the center graticule line or at the desired zero current reference 4 Setthe input coupling of the oscilloscope to DC 5 Turn off any oscilloscope bandwidth filters Once you have set up the oscilloscope you do not need to further adjust the oscilloscope vertical controls while you are using the AM 503B and AM 5030 Use the oscilloscope controls to adjust the time base or trigger settings only NOTE To maintain a
117. on Manual 2 17 Functional Command Groups GPIB Status Commands The commands listed in Table 2 2 are used to provide event information and configure the GPIB interface Table 2 2 GPIB Status Commands Command Name Description ALLE ve Returns all pending event codes ERRor Returns the last pending event code EVent Returns the last pending event code EXit Recovers from an error condition HELp Returns a list of AM 5030 GPIB commands PATH Sets whether queries return command names RQS Enables or disables system requests SRQs SET Returns all AM 5030 settings as command string Amplifier Status Commands The commands listed in Table 2 3 are used to identify configure and test the AM 5030 amplifier Table 2 3 Amplifier Status Commands Command Name Description ID Returns instrument ID including firmware version numbers INIT Initializes AM 5030 to factory default settings SERIAL Returns AM 5030 serial number TEST Performs AM 5030 self test AM 503B amp AM 5030 Amplifier Instruction Manual Functional Command Groups Probe Status Commands The commands listed in Table 2 4 are used to adjust and provide information about the probe currently in use Table 2 4 Probe Status Commands Command Name Description PROBEOPen Returns the state of the probe open indicator PROBETRim Sets probe gain adjustment factor PROBETYpe Returns model of current probe being used NOTE The PROBETYpe que
118. onductor around the probe as shown in Figure 3 4 b The bucking current is equal to the current flowing in the conductor multiplied by the number of turns wound around the probe For example if the second conductor has a current of 100 mA DC and is wrapped around the probe five times the DC bucking current is 100 mA multiplied by 5 or 500 mA DC To determine measurement values add the value of the bucking current to the displayed measurement NOTE Adding a second conductor to the probe increases the insertion imped ance and reduces the upper bandwidth limit of the probe Winding multiple turns further increases the insertion impedance further reducing the upper bandwidth limit I Curent C icc Conductor Under Test Conductor Bucking Current Supplied by Second Conductor Current Probe a Adding a Second Conductor Figure 3 4 Increasing the DC Measurement Range 3 6 Extra Turns Added to Increase Bucking Current Current Probe b Adding Multiple Turns AM 503B amp AM 5030 Amplifier Instruction Manual Reference Notes Extending AC Range You can extend the AC amplitude limit of the AM 503B and AM 5030 by using the Tektronix CT 4 High Current Transformer The CT 4 designed for use with the A6312 A6302 or A6302XL current probes extends the current probe range by a factor of 20 1 or 1000 1 The CT 4 can provide external steady state DC bucking current up to 300 A For more information
119. ould result in damage to this product or other property These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product AM 503B amp AM 5030 Amplifier Instruction Manual General Safety Summary Symbols on the Product The following symbols may appear on the product AN m DANGER Protective Ground ATTENTION Double High Voltage Earth Terminal Refer to Manual Insulated Certifications and Compliances CSA Certified Power CSA Certification includes the products and power cords appropriate for use Cords the North America power network All other power cords supplied are approved for the country of use Safety Certification of For plug in modules that are safety certified by Underwriters Laboratories UL Plug in Modules Listing applies only when the module is installed in a UL Listed product CSA Certification applies only when the module is installed in a CSA Certified product AM 503B amp AM 5030 Amplifier Instruction Manual xi General Safety Summary xii AM 503B amp AM 5030 Amplifier Instruction Manual P Service Safety Summary Do Not Service Alone Disconnect Power Use Care When Servicing With Power On Only qualified personnel should perform service procedures Read this Service Safe
120. plifier grasp the release lever at the lower left corner of the Amplifier front panel and pull the Amplifier out of the power module Slide instrument into power module Figure 1 4 Installing the AM 503B and AM 5030 into the Power Module After you have installed the Amplifier and all other desired plug in instruments into the power module you may turn the power module on A digital readout should appear on the Amplifier front panel and a coupling light should come on See Figure 2 4 on page 2 7 for the location of the coupling lights NOTE When the AM 5030 is not connected to a GPIB controller the SRQ light is normally on AM 503B amp AM 5030 Amplifier Instruction Manual Getting Started Connecting the Amplifier to an Oscilloscope You will need an oscilloscope to display the AM 503B and AM 5030 measure ment output The oscilloscope must be capable of displaying a vertical scale factor of 10 mV div Use the supplied 50 2 BNC cable to connect the Amplifier OUTPUT connector to your oscilloscope see Figure 1 1 on page 1 2 The input impedance of the oscilloscope channel must be 50 Q otherwise you will encounter slowed pulse response increased aberrations or incorrect DC measurement amplitudes If your oscilloscope provides only 1 MQ inputs you need to attach a 50 Q feed through termination between the oscilloscope input and the BNC cable Do not install this termination at the Amplifier end of the BNC cable T
121. probe you are using Refer to the specifications table on page 4 3 for the bandwidth limit frequency for your current probe After the PROBE DEGAUSS AUTOBALANCE routine has been run the probe and amplifier system will meet all published specifications however if you want to improve the tolerance of the system accuracy or to intentionally offset the accuracy to make up for total system errors the probe trim adjust routine may be performed Probe trim adjust is a multiplicative factor that you can use to adjust the gain of the current amplifier system You can set this multiplier in increments of 0 001 from 0 750 through 1 250 Probe trim adjust is used for an optional calibration of some current probes If you are not performing such an adjustment leave probe trim adjust to the factory default of unity gain 1 000 To set probe trim adjust press and hold the 20MHz BW LIMIT button while pressing and releasing the COUPLING button Use the amp and lt gt buttons to AM 503B amp AM 5030 Amplifier Instruction Manual Control Summary adjust the setting that is displayed in the CURRENT DIVISION display When finished press either the 20MHz BW LIMIT or COUPLING button to restore normal operation The display shows the last three significant digits of the display adjust setting the leading 0 or 1 are omitted If the first digit displayed is 7 8 or 9 then the leading digit must be 0 If the first digit displayed is 0 1 or 2
122. quipment Settings or check the equipment settings in Table 5 16 Table 5 16 Equipment Settings for DC Gain Accuracy Digital Multimeter Measurement Type DC volts Range Autoranging Current Source Output Off AM 503B and AM 5030 Coupling DC BW Limit On Current division 5 mA division Equipment Connections 1 Using a BNC cable connect the Amplifier OUTPUT to a 50 Q feedthrough termination Attach the termination to a BNC to dual banana adapter Taking care to observe the adapter polarity insert the dual banana adapter into the digital multimeter DC voltage input 2 Connect the current loop to the current source as shown in Figure 5 9 5 32 AM 503B amp AM 5030 Amplifier Instruction Manual Performance Verification with an A6303 or A6303XL Amplifier in T Series Power Module Current DMM Source 50 Turns N BNC to Dual Banana Adapter ar 50 Q Termination 50 O Coaxial Cable Current Flow Figure 5 9 DC Gain Accuracy Test Setup for A6303 A6303XL tions in a normally operating heart pacemaker or damage sensitive equipment Personnel fitted with pacemakers should not perform this test and should stay at least 10 feet from the current loop while the test is being conducted N WARNING This test produces intense magnetic fields that may cause malfunc Procedure 1 Do not clamp the current probe a
123. r difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES EXPRESSED OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES EC Declaration of Conformity Tektronix Holland N V Marktweg 73A 8444 AB Heerenveen The Netherlands declare under sole responsibility that the 503 Current Probe Amplifier meet the intent of Directive 89 336 EEC for Electromagnetic Compatibility Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities EN 50081 1 Emissions EN 55022 Class B Radiated and Conducted Emissions EN 60555 2 AC Power Line Harmonic Emissions EN 50082 1 Immunity IEC 801 2 Electrostatic Discharge Immunity IEC 801 3 RF Electromagnetic Field Immunity IEC 801 4 Electrical Fast Transient Burst Immunity 801 5 Power Line Surge Immunity This product complies when installed into the following Tektronix instrument enclosure 502 Power Supply
124. r that plugs into the rear of the front panel BNC output connector Refer to Figure 7 8 3 Carefully withdraw the output cable from the BNC output connector 4 AM 5030 only Using a Torx T 10 screwdriver remove the three screws holding the GPIB circuit board in place Slide the board towards the front panel until the edge connector is free and then lift the card out of the way 5 Taking care to prevent damage to the easily bent center conductor insert the output cable into the rear interface output connector as shown in Figure 7 8 7 8 AM 503B amp AM 5030 Amplifier Instruction Manual Disassembly 6 AM 5030 only Replace the GPIB circuit board by guiding the edge connector through the back plane and replacing the three hold down screws 7 To restore instrument output to the front panel BNC output connector reverse the procedure 5 Front Panel BNC lt Output Connector Rear Interface Output Connector A Output Cable Figure 7 8 Using the Rear Interface Output Connector AM 503B amp AM 5030 Amplifier Instruction Manual 7 9 Disassembly Battery Replacement AN 7 10 This procedure describes how to replace the Amplifier backup battery 1 Usinga small flat blade screwdriver gently pry against the battery terminal as shown in Figure 7 9 until the battery just starts to slide out CAUTION Avoid using excessive force when pryin
125. ration fixture to the calibration generator 50 Q fast rise output NOTE If your oscilloscope cannot trigger on the pulse use another BNC cable to connect the trigger output of the pulse generator to the trigger input of the oscilloscope Configure the oscilloscope for an external trigger Make or check the equipment settings in Table 5 15 AM 503B amp AM 5030 Amplifier Instruction Manual Performance Verification with an A6303 or A6303XL Procedure Table 5 15 Equipment Settings for Rise Time Oscilloscope Vertical input impedance 500 Vertical gain 5 mV division Time base 10 ns division Record length 500 Coupling DC Offset 0 V mid scale Trigger type Edge Trigger mode Auto Trigger position 50 Acquisition mode Average Number of waveforms to average 8 Measurement type Rise Time Calibration Generator Period 1 us Output FastRise Amplitude Maximum AM 503B and AM 5030 Coupling DC BW Limit off Current division 5 mA division NOTE This is the only test where the oscilloscope vertical gain should be set at other than 10 mV division Reset the vertical gain to 10 mV division when the rise time check is complete 1 Do not clamp the current probe around any conductor but make sure the jaws are locked shut 2 Press the Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalance routine to complete before proceeding The routine is complete when the indicator light tu
126. re Amplifier Figure 7 1 Removing the AM 503B and AM 5030 Side Covers Front Panel and Release Lever Assembly 7 4 A CAUTION The AM 503B and AM 5030 contain devices that are susceptible to damage from static discharge To prevent damage to static sensitive devices observe the precautions listed at the beginning of this section whenever the covers are off the instrument or you handle component assemblies In order to remove the front panel assembly the release lever must be removed Perform steps 1 through 4 to remove the front panel assembly If you want to repair the release lever assembly complete all the steps The release lever assembly consists of the release lever latch bar and retaining latch These procedures describe how to remove and replace each item 1 Remove the left side cover when facing the front of the Amplifier AM 503B amp AM 5030 Amplifier Instruction Manual Disassembly 2 Push the latch bar forward as shown in Figure 7 2 Pry the back end of the release lever up and pull the release lever through the front panel Retaining Latch Bar Figure 7 2 Removing the Amplifier Release Lever 3 Unplug the input output and front panel interface cables from the main circuit board Figure 7 3 shows the location of these cables Front Panel Interface Cable Flex Connector Output Cable Figure 7 3 Location of Amplifier Interface Ca
127. rent loop is used in the performance verification procedure for checking the performance of the AM 503B and AM 5030 m If you need to measure high amplitude AC currents consider using Tektronix CT 4 High Current Transformer with the A6312 A6302 or A6302XL probes The CT 4 provides step down ratios of 20 1 or 1000 1 For more information about the CT 4 consult your Tektronix sales represen tative Installing the TM Series Power Module If you ordered your current probe amplifier as a part of a system a power module will have been provided Follow these instructions for the proper setup and installation of the power module The TM Series Power Module can operate from one of four AC line voltages The operating voltage is determined by the voltage selector located on the rear panel of the TM Series Power Module as shown in Figure 1 2 WARNING To avoid personal injury or equipment damage do not connect the power module to the AC line receptacle or turn the power module on until you have verified that the proper operating voltage is selected Voltage Selector Selector Window ee Latch TM Series Power Module Figure 1 2 TM Series Power Module Voltage Selector 1 4 503 amp 5030 Amplifier Instruction Manual Getting Started The value displayed in the voltage selector window should match the value of your line voltage If the two values don t m
128. rns off 3 Clamp the current probe around the current loop calibration fixture Check that the arrow shaped indicator on the probe points away from the source 4 Using the measurement capability of the oscilloscope measure the rise time of the displayed pulse from 10 to 90 amplitude 5 Check that the rise time is less than the warranted specification Refer to Table 4 1 on page 4 2 6 Reset the oscilloscope vertical gain to 10 mV division AM 503B amp AM 5030 Amplifier Instruction Manual 5 31 Performance Verification with an A6303 or A6303XL DC Gain Accuracy WARNING This test produces intense magnetic fields that may cause malfunc N tions in a normally operating heart pacemaker or damage sensitive equipment Personnel fitted with pacemakers should not perform this test and should stay at least 10 feet from the current loop while the test is being conducted This procedure tests the DC gain accuracy of the A6303 and A6303XL In this test you compare the voltage output of the Amplifier to a reference input Current Loop for DC Gain You will need to construct a simple current loop in order to complete the DC Accuracy Check gain accuracy tests Construct the loop as follows using a cylindrical form approximately 3 inches in diameter wind exactly 50 turns of 21 coated wire NOTE Ensure that the current loop has exactly 50 turns A significant error will result for each turn variance from 50 turns E
129. rns off Clamp the current probe around the 20 turn current loop as shown in Figure 5 6 on page 5 22 Verify that the arrow shaped indicator on the probe points away from the current source AM 503B amp AM 5030 Amplifier Instruction Manual Performance Verification with an A6302 or A6302XL 4 For each of the Amplifier current division settings in Table 5 11 on page 5 23 perform the following steps a Setthe Amplifier to the desired current division setting from Table 5 11 b Setthe current source to the correct positive test current using Table 5 11 c Turnon the current source d Record the exact measurement of the digital multimeter as M You can copy Table 5 12 on page 5 25 to record the results of your measure ments e Setthe current source for the correct negative test current using Table 5 11 Table 5 11 DC Gain Accuracy Test for A6302 A6302XL Turns of Current AM 503B and Loop Passing AM 5030 Current Source Test Current Through Probe Current Division Output h 20 1 mA 250 pA 10 mA 20 2 mA 500 20 mA 20 5 mA 1 25 mA 50 mA 20 10 mA 2 5 mA 100 mA 20 20 mA 5 mA 200 mA 20 50 mA 12 5 mA 500 mA 20 100 mA 25 mA 1A 20 200 mA 50 mA 2A 20 500 mA 125 mA 5A 20 1A 250 mA 10A 20 2A 500 mA 20 A 20 5A 1 40 f Record the digital multimeter reading as g Calculate the measured current Zn using the following formula p 70 01 X current division
130. rns the status of the probe open indicator the front panel PROBE OPEN light Syntax PROBEOPen Returns PROBEOPEN ON PROBEOPEN OFF Examples PROBEOP might return PROBEOPEN ON indicating that the probe is not locked shut AM 503B amp AM 5030 Amplifier Instruction Manual 2 27 Commands PROBETRim Syntax Arguments Examples 2 28 Lets you specify a multiplicative gain factor trim adjustment for probe compensation There is a trim adjustment value for each type of probe for example A6302 A6312 A6302XL A6303 A6303XL or A6304XL This command will set or query only the trim adjustment for the type of current probe currently connected to the AM 5030 If no probe is connected executing this command or query will cause error 264 No probe connected Probe trim is used to perform an optional fine tune calibration of the A6303 Current Probe NOTE The AM 5030 amplifier retains only one trim adjustment value for each probe type Before using another probe of the same type you must specify a new gain factor The AM 5030 amplifier regards the A6302 and A6312 as the same probe type PROBETRim number PROBETRim number is a multiplicative gain factor in the range 0 750 to 1 250 in increments of 0 001 The probe input will be multiplied by this gain factor PROBETR 1 sets the trim adjustment to unity for the type of probe currently connected to the AM 5030 PROBETR might return PROBETRIM 1 1
131. robe Trim Adjust The CURRENT DIVISION 4 and lt gt buttons set the scale factor sensitivity of the AM 503B and AM 5030 in a 1 2 5 sequence The setting of this control is displayed on the digital readout and the units indicator The CURRENT DIVI SION display indicates the Amplifier scale factor only it is not a current measurement readout The measurement output is displayed on the oscilloscope NOTE To maintain accurate measurements the vertical gain of the oscilloscope must remain at 10 mV div The COUPLING button determines the coupling between the current probe and the AM 503B and AM 5030 Press the COUPLING button repeatedly until the desired indicator lights up To couple the current probe for DC plus AC measurements use DC coupling For AC measurements only use AC coupling To establish a zero current reference use REF coupling While using REF coupling you cannot measure current or view current waveforms NOTE Even when making AC current measurements leave the oscilloscope coupling on DC Change only the Amplifier coupling to AC Using the oscillo scope AC coupling may cause the Amplifier to exceed its output dynamic range The 20 MHz BW LIMIT button lets you limit the current probe amplifier bandwidth to 20 MHz This can be useful to remove high frequency noise Press the button again to return to full bandwidth When the button lights the bandwidth limit is on System bandwidth depends on the type of current
132. round any conductor but make sure the jaws are locked shut 2 Press the Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalance routine to complete before proceeding The routine is complete when the indicator light turns off 3 Clamp the current probe around the one conductor of the current loop See Figure 5 9 on page 5 33 Check that the arrow shaped indicator on the probe points away from the current source 4 For each of the Amplifier current division settings in Table 5 17 on page 5 34 perform the following steps a Setthe Amplifier to the desired current division setting from Table 5 17 b Set the current source to the correct positive test current using Table 5 17 Turn on the current source d Record the exact measurement of the digital multimeter as You can copy Table 5 18 on page 5 36 to record the results of your measure ments AM 503B amp AM 5030 Amplifier Instruction Manual 5 33 Performance Verification with an A6303 or A6303XL e Set the current source for the correct negative test current using Table 5 17 Table 5 17 DC Gain Accuracy Test for A6303 A6303XL Turns of Current AM 503B and Loop Passing AM 5030 Current Source Test Current Through Probe Current Division Output h 50 5 mA 500 uA 50 mA 50 10 mA 1 mA 100 mA 50 20 mA 2 mA 200 mA 50 50 mA 5 mA 500 mA 50 100 mA 10 mA 1A 50 200 mA 20 mA 2A 50 500 mA 50 mA 5A 50 1A 100 mA 10A
133. rranted AM 503B and AM 5030 Specifications Parameter Bandwidth DC to 100 MHz DC to 50 MHz Installed A6303 DC to 15 MHz Probe A6302XL DC to 17 MHz A6303XL DC to 10 MHz A6304XL DC to 2 MHz 3 dB 3 dB 3 dB 3 dB 3 dB 3 dB Rise Time 10 to 90 lt 3 5 ns lt 7ns lt 23 ns lt 20 5 lt 35 15 175 ns DC Gain Accuracy lt 3 1 lt 3 1 lt 3 lt 3 1 lt 3 lt 3 1 The DC gain accuracy is correctable to lt 0 2 when using the probe trim procedure described on page 2 10 Nominal and Typical Characteristics Nominal and typical characteristics Tables 4 2 and 4 3 are not guaranteed They are provided to characterize the configuration performance or operation of typical probe amplifier combinations Table 4 2 Nominal and Typical AM 503B and AM 5030 Characteristics Parameter Current Division Ranges nominal Oscilloscope at 10 mV div 1 mA div to 5 Adiv 1 2 5 sequence 1 mA div to 5 Aldiv 1 2 5 sequence Installed Probe 5 mA div to 50 9 1 2 5 sequence A6302XL 1 mA div to 5 Aldiv 1 2 5 sequence A6303XL 5 mA div to 50 A div 1 2 5 sequence A6304XL 500 mA div to 200 A div 1 2 5 sequence Input Coupling nominal AC DC and REF AC DC and REF AC DC and REF AC DC and REF AC DC and REF AC DC and REF AC Coupling Low Frequency
134. ry returns PROBETYPE A6302 for both A6302 and A6312 current probes AM 503B amp AM 5030 Amplifier Instruction Manual 2 19 Functional Command Groups 2 20 503 amp 5030 Amplifier Instruction Manual Commands This section supports the GPIB commands with command definitions syntax return messages and examples ALLEve Query Only Returns a comma delimited list of up to 41 pending event codes If no event is pending it returns the code for no events to report Syntax ALLEve Returns ALLEVE number lt number gt ALLEve only produces meaningful results when RQS is off When RQS is on ALLEve operates the same as EVent except that the returned header is ALLEVE instead of EVENT Examples ALLE might return 266 indicating that the degauss autobalance routine has failed because the AM 5030 OUTPUT is not terminated into 50 AMPS Sets or queries the resolution of the AM 5030 Syntax AMPS number AMPS Arguments Number is in amperes per division and should represent a valid setting for the probe being used Numbers will be rounded to the nearest setting in a 1 2 5 sequence Examples AMPS 0 005 sets the resolution of the AM 5030 to 5 mA division AMPS might return AMPS 5E 3 indicating that the AM 5030 resolution of the AM 5030 is 5 mA division AM 503B amp AM 5030 Amplifier Instruction Manual 2 21 Commands BWLIMit COUpling 2 22 Syntax Ar
135. service center or representative Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit improvements Therefore when ordering parts it is important to include the following information in your order m Part number m Instrument type or model number m Instrument serial number Instrument modification number if applicable If a part you order has been replaced with a different or improved part your local Tektronix service center or representative will contact you concerning any change in the part number Using the Replaceable Parts List Item Names The tabular information in the Replaceable Parts List is arranged for quick retrieval Understanding the structure and features of the list will help you find all the information you need for ordering replacement parts In the Replaceable Parts List an Item Name is separated from the description by a colon Because of space limitations an Item Name may sometimes appear as incomplete For further Item Name identification U S Federal Cataloging Handbook H6 1 can be used where possible AM 503B amp AM 5030 Amplifier Instruction Manual 8 1 Replaceable Parts Indentation System This parts list is indented to show the relationship between items The following example is of the indentation system used in the Description column 1 2 3 4 5 Name amp Description Assembl
136. sure that the current loop has exactly 20 turns A significant error will result for each turn variance from 20 turns Equipment Connections 1 Using a BNC cable connect the Amplifier OUTPUT to the 50 Q feed through termination Attach the termination to a BNC to dual banana adapter Taking care to observe and maintain polarity insert the dual banana adapter into the digital multimeter DC voltage input 2 Connect the current loop to the current source as shown in Figure 5 3 AM 503B amp AM 5030 Amplifier Instruction Manual 5 9 Performance Verification with an A6312 Equipment Settings Procedure Banana Adapter pri 50 Termination Amplifier in T Series Power Module Current DMM Source BNC to Dual 50 Coaxial Cable Current Flow Figure 5 3 DC Gain Accuracy Test Setup for A6312 Make or verify the equipment settings in Table 5 4 Table 5 4 Equipment Settings for DC Gain Accuracy Digital Multimeter Measurement Type DC volts Range Autoranging Current Source Output Off AM 503B and AM 5030 Coupling DC BW Limit On 20 MHz Current division 1 mA division Probe Trim 000 1 Do not clamp the current probe around any conductor but make sure the jaws are locked shut Press the Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalanc
137. surements 3 11 INIT Command 2 26 INPUT connector 2 11 insertion impedance Glossary 2 L LO error code 3 19 locking the probes 2 1 maintenance 7 1 maximum continuous current rating 3 4 maximum pulsed current rating 3 4 measuring continuity 3 14 measuring current AC 2 4 current nulls 3 2 DC 2 3 differential current 3 2 measuring inductance 3 11 mechanical parts 8 1 AM 503B amp AM 5030 Amplifier Instruction Manual Index N noise 3 2 null current 3 2 0 optional accessories 1 3 output cable moving 7 8 OUTPUT connector 2 11 output rear interface 7 8 OVERLOAD indicator 2 8 OVerload Command 2 26 P PATH Command 2 27 PROBE DEGAUSS AUTOBALANCE button 2 2 2 8 PROBE DEGAUSS AUTOBALANCE indicator 2 9 PROBE OPEN indicator 2 8 probe trim adjust 2 10 PROBEOPen Command 2 27 probes bandwidth considerations 3 2 coupling 3 3 degaussing demagnetizing 2 2 2 8 description 1 2 increasing the current limit 3 5 maintenance 7 1 maximum current limits 3 4 operation 2 1 saturation 3 4 PROBETRim Command 2 28 PROBETYpe Command 2 29 AM 503B amp AM 5030 Amplifier Instruction Manual R rear interface output 7 8 REF coupling 2 10 release lever 2 11 REMOTE indicator 2 12 replaceable mechanical parts 8 1 RQS Command 2 29 S saturation Glossary 2 SERIAL Command 2 30 SET Command 2 30 specifications 4 1 probe serial numbers 4 1 SRQ indicator
138. t the Amplifier output 2 Connect the current probe to the Amplifier INPUT 3 Connect the current loop calibration fixture to the output of the leveled sine wave generator Make or check the equipment settings in Table 5 14 AM 503B amp AM 5030 Amplifier Instruction Manual Performance Verification with an A6303 or A6303XL Table 5 14 Equipment Settings for Bandwidth Oscilloscope Vertical input impedance 500 Vertical gain 10 mV division Time base 200 ns division Record length 500 Coupling DC Offset 0 V mid scale Trigger type Edge Trigger mode Auto Trigger position 50 Acquisition mode Average Number of waveforms to average 8 Measurement type Peak to P eak Leveled Sine Wave Generator Frequency 3MHz Amplitude 3 Vp AM 503B and AM 5030 Coupling DC BW Limit Off Current division 10 mA division Procedure 1 Do not clamp the current probe around any conductor but make sure the jaws are locked shut 2 Press the Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalance routine to complete before proceeding The routine is complete when the indicator light turns off 3 Clamp the current probe around the current loop calibration fixture 4 Adjust the signal generator output so that the Amplifier output is 60 mVp p or six graticule divisions on the oscilloscope 5 Using the peak peak measurement capability of the oscilloscope measure and record the peak peak reading
139. ted Specifications 5 2 Performance Verification with an 6312 5 3 Required Test Equipment 5 3 Bandwidth RA LUCR ER ERES Een 5 5 Rise Time RURSUS RR ERA CUN CR CER RAN CUR RIO d 5 7 DC Gam ACCUTACY iue CERE Be he ERNST 5 9 ii AM 503B amp AM 5030 Amplifier Instruction Manual Contents Performance Verification with an A6302 or A6300XL 5 15 Required Test Equipment 5 15 Bandwidth 65 24 cannes ais codes te eua bia Rares Gaara Rages 5 17 Rise TIME fod as Sata eec Ad Row Ral Baha RR tee RR UR ct n ERROR RES 5 19 DG Gain Accuracy x o dace eds ea ee AA dp reci daos 5 21 Performance Verification with an 6303 or A6303XL 5 27 Required Test Equipment 5 27 Bandwidth sieti 2 2 m nest dee pt ea ipee done ur dain ee 5 28 Rise Tine e boe eM RE eee ates ute or re Oe SERE 5 30 Aceur cy unse ine Ce e ree 5 32 Performance Verification with A6304XL 5 37 Required Test Equipment 5 37 Rise Time 22 22 Dt IRR REED RICE UE Sea 5 38 Bandyadtl de ta dic Ug S c ER og 5 40 DC Gain Accufacy sie Ra IRRE 5 40 Adjustment Proced
140. termination at the Amplifier output 2 Connect the current probe to the Amplifier INPUT 3 Connect the current loop calibration fixture to the output of the leveled sine wave generator Make or verify the equipment settings in Table 5 8 Table 5 8 Equipment Settings for Bandwidth Oscilloscope Vertical input impedance 500 Vertical gain 10 mV division Time base 200 ns division Record length 500 Coupling DC Offset 0 V mid scale 5 17 Performance Verification with an A6302 or A6302XL Procedure Table 5 8 Equipment Settings for Bandwidth Cont Oscilloscope Trigger type Edge Trigger mode Auto Trigger position 50 Acquisition mode Average Number of waveforms to average 8 Measurement type Peak to P eak Leveled Sine Wave Generator Frequency 3MHz Amplitude 3 Vp AM 503B and AM 5030 Coupling DC BW Limit Off full bandwidth Current division 10 mA division 1 Do not clamp the current probe around any conductor but make sure the jaws are locked shut 2 Pressthe Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalance routine to complete before proceeding The routine is complete when the indicator light turns off 3 Clamp the current probe around the calibration fixture 4 Adjust the signal generator output so that the Amplifier output is approxi mately 60 or six graticule divisions on the oscilloscope 5 Using the peak peak measurement capab
141. then the leading digit must be 1 OUTPUT Connector Amplifier current measurement output is accessed at the OUTPUT connector which should be connected to the oscilloscope input Attach one end of a 50 BNC cable to this connector and the other end to a 50 Q vertical input of your oscilloscope The output impedance of the Amplifier is 50 Q NOTE To obtain accurate measurements the input impedance of your oscillo scope must be 50 X2 Make sure your Amplifier OUTPUT is connected to an oscilloscope input using 50 BNC cable and that the oscilloscope input is set to 50 2 impedance See Figure 1 1 on page 1 2 for proper cabling If your oscilloscope does not have 50 2 impedance settings for inputs you can place 50 2 feedthrough termination on the oscilloscope input and connect the Amplifier output cable to the termination Do not place the feedthrough termination at the Amplifier end of the BNC connecting cable INPUT Connector All current probes compatible with the AM 503B and AM 5030 attach at the INPUT connector which is a 12 pin female connector For information about connecting a probe see Connecting a Current Probe to the AM 503B and AM 5030 on page 1 8 before removing or installing a current probe fh CAUTION To avoid equipment damage turn the TM Series Power Module off Release Lever The release lever has the Tektronix name printed on it Pull the release lever to remove the Amplifier from the pow
142. tion fixtures the units will be volts UNIts UNITS A UNITS V UNI might return A indicating that a current probe is connected to the AM 5030 OUTPUT connector and the output units are amperes AM 503B amp AM 5030 Amplifier Instruction Manual 2 31 Commands 2 32 AM 503B amp AM 5030 Amplifier Instruction Manual E 8 Error Messages amp Codes NOTE This material applies primarily to the AM 5030 Programmable Amplifier Event Codes displayed on the front panel apply also to the AM 503B These are the event codes also known as error codes that the AM 5030 can generate along with their meaning Some of these codes may also appear on the front panel in the CURRENT DIVISION readout Table 2 5 AM 5030 Event Codes Displayed on Error Number Front Panel Description of Error 0 Null event Reported when RQS is ON and EVent ERRor or ALLE ve is attempted prior to reading the serial poll status byte 101 Io Invalid GPIB command 154 Invalid number in GPIB command 155 No Invalid quoted string String may be more than 128 characters be terminated with EOI or LF if terminator is setto EOI and LF or contain an ASCII NUL 0 156 No Invalid GPIB command 157 No Syntax error 160 No Expression too complex 203 No buffers full so output buffer was dumped This may happen if you send a sequence of queries without talk addressing the AM
143. tion Manual Performance Verification an A6304XL Table 5 22 DC Gain Accuracy Test for the A6304XL Turns of Current AM 503B and Loop Passing AM 5030 Current Source Test Current Through Probe Current Division Output h 250 500 mA 10 mA 5A 250 1A 20 mA 10A 250 2A 40 mA 20 250 5 100 50 250 10 200 100 250 20 400 200A 250 50A 500 250 100A 2 1000 A 250 200A 2 1000 A AM 503B amp AM 5030 Amplifier Instruction Manual 5 43 Performance Verification an A6304XL Table 5 23 DC Gain Accuracy Test Work Sheet for the A6304XL Turns of Current AM 503B and T Loop Passing AM 5030 Current Source Test Current Im Error Through Probe Current Division Output M Note Note 250 500 mA om 250 2A 40 mA 20A 250 5A 100 mA 50A 250 10A 200 mA 100A 250 20A 400 mA 200A 250 50A 1A 500A 250 100A 2 1000 250 200 2 1000 MES In X current division ud Error Im rH x 100 t 5 44 503 amp 5030 Amplifier Instruction Manual Adjustment Procedures RE Adjustment Procedures for Current Probes Before performing the adjustment procedures perform the following steps 1 Install all plug in units into the power modules 2 Attach the current probe to be adjusted 3 Turn the power on and allow the entire system to warm up for a minimum of 20 minutes Also warm up any oth
144. ton and squeeze the handle until the core is open To lock the probe release the squeeze handle and press the top of the lock button AM 503B amp AM 5030 Amplifier Instruction Manual 2 1 Measurements ee gt 2 Lock the probe 1 Unlock the probe 1 Release the handle Ner A 2 es the handle a Opening the Probe b Closing and Locking the Probe Figure 2 2 A6303 A6303XL and A6304XL Slide Operation Degaussing and Autobalancing the Current Probe Degaussing the probe removes any residual magnetization from the probe core Such residual magnetization can induce measurement error Autobalancing removes unwanted DC offsets in the amplifier circuitry Failure to degauss the probe is a leading cause of measurement errors To maintain measurement accuracy degauss your probe in each of these cases After turning on the Amplifier and allowing a 20 minute warm up period m Before connecting the probe to a conductor or changing conductors under test m Whenever an overload condition occurs m Whenever the probe is subjected to a strong external magnetic field m Periodically during normal use 2 2 AM 503B amp AM 5030 Amplifier Instruction Manual Measurements To degauss and autobalance a current probe perform these steps 1 Verify that the current probe is connected to the Amplifier Remove the current probe from the conductor under test Lock the probe slide closed see Fig
145. ty Summary and the General Safety Summary before performing any service procedures Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present To avoid electric shock disconnect the main power by means of the power cord or if provided the power switch Dangerous voltages or currents may exist in this product Disconnect power remove battery if applicable and disconnect test leads before removing protective panels soldering or replacing components To avoid electric shock do not touch exposed connections AM 503B amp AM 5030 Amplifier Instruction Manual xiii Service Safety Summary xiv AM 503B amp AM 5030 Amplifier Instruction Manual Preface Related Manuals Manual Conventions This Instruction Manual supports the operation and basic maintenance of the AM 503B and AM 5030 Current Probe Amplifiers If you are not familiar with this product please refer to the Getting Started and Operating Basics chapters of this manual for basic operating information If you are an advanced user the Reference section contains information on advanced applications as well as user diagnostic and troubleshooting informa tion The Performance Verification and Adjustment Procedure sections support the qualification and calibration of the probes when used with either amplifier NOTE Except for the A6303 once a probe has been calibrated it
146. up Remedy Move the Amplifier to another slot in the TM Series Power Module Power transistors in that position of the TM Series Power Module may be defective This may be the case even if other TM 500 or TM 5000 instruments work in that position not all instruments use the power module power transistors Front panel displays error code 266 The Amplifier is not terminated into 50 O Set oscilloscope input impedance to 50 O and input coupling to DC If the oscilloscope input impedance is fixed at 1 MQ attach a 50 O termination see replaceable parts list at the oscilloscope input Do not attach the termination at the Amplifier output Front panel displays error code 357 or LO Battery is weak Battery replacement should be performed by a qualified service person Front panel displays an error code Note the error code and turn the instrument off Review installation and operating information in this manual Power up the instrument If the error condition persists refer the instrumentto qualified service personnel for repair Cannot make a current measurement Cannot degauss the probe Stray DC component in measurement Current P robe is not locked Current P robe is improperly connected to the Amplifier input connector Coupling is setto REF position Change to AC orDC Current P robe is not locked Current P robe is improperly connected to the Amplifier input connector Degauss the probe using
147. ures Adjustment Procedures for Current Probes 6 1 6312 6302 and A6302XL Adjustment 6 3 Required Test Equipment 6 3 A6312 6302 and A6302XL DC Offset Adjustment 6 3 A6303 and A6303XL Adjustments 6 7 Required Test Equipment 6 7 6303 and A6303XL DC Offset Adjustment 6 8 A6303 and A6303XL Transient Response and Gain Adjustment 6 10 A6304XL Adjustments 6 13 Required Test Equipment 6 13 A6304XL DC Offset Adjustment 6 14 DC Gain Adjustment eed e age Rap dre nan 6 16 A6304XL Transient Response Adjustment 6 18 Maintenance Customer Maintenance 7 1 Service Strategy ya Wi eae LIEFER RARI ERES 7 1 Preventive Maintenance 7 1 Disassembly gt e ba Re FERE UE ERA M E ER 7 3 Static Device Precautions 7 3 Front Panel Knobs 7 4 Side Covers voee ERI wince doa ta aks 7 4 Front Panel and Release Lever Assembly 7 4 Front Panel Disass
148. ures 2 1 and 2 2 E Press the Amplifier PROBE DEGAUSS AUTOBALANCE button NOTE The degauss procedure will fail if the Amplifier is not properly connected to an oscilloscope having 50 input impedance If this occurs an error code of 266 will be displayed on the Amplifier front panel After you have completed the oscilloscope adjustments and the Amplifier degauss autobalance procedure your system is ready to measure current DC Measurements To measure DC current perform these steps 1 Verify that the vertical gain of the oscilloscope is 10 mV div the input coupling is DC and the input impedance is set to 50 Q 2 Adjustthe ground reference of the oscilloscope to move the trace to the desired graticule line NOTE Once the first two steps have been completed no further adjustments are required on the oscilloscope vertical amplifier during the measurement session Use the Amplifier controls for everything except time base and trigger adjust ment See Figure 2 4 3 Lock the probe closed without a conductor passing through it Press the Amplifier COUPLING button repeatedly until the REF light comes on and then press the Amplifier PROBE DEGAUSS AUTOBALANCE button 4 After the degauss autobalance routine completes adjust the ground reference f necessary using the Amplifier OUTPUT DC LEVEL control 5 Open the probe slide place the probe around the conductor under test and then lock the slide For
149. ut impedance of your oscilloscope is 1 MQ connect a 50 2 feedthrough termination to the oscilloscope input Do not connect the termination at the Amplifier output AM 503B amp AM 5030 Amplifier Instruction Manual 6 3 A6312 A6302 and A6302XL Adjustment Equipment Settings Procedure 6 4 2 Connect the current probe to the Amplifier INPUT connector 3 Do not clamp the current probe around any conductor but make sure the jaws are locked shut Make or verify the equipment settings in Table 6 2 Table 6 2 Settings for DC Offset Adjustment AM 503B and AM 5030 Coupling DC BW Limit On 20 MHz bandwidth limit Current division 10 mA division Oscilloscope Vertical Gain 10 mV division Time Base 1 ms division Auto triggered Input Coupling Ground 1 Move the oscilloscope trace to the center horizontal graticule line using the vertical position control 2 Set the oscilloscope input coupling to DC 3 Do not clamp the current probe around any conductor but make sure the jaws are locked shut 4 Press the Amplifier PROBE DEGAUSS AUTOBALANCE button Wait for the degauss autobalance routine to complete before proceeding The routine is complete when the indicator light turns off NOTE The Amplifier front panel will display error code 266 after the degauss autobalance routine completes if the Amplifier is not properly terminated into 50 Q Verify that the oscilloscope input is 50 and set to
150. when the current probe is clamped around a test conductor magnetic susceptibility A figure expressing the amount of current induced into the probe by an external magnetic field of known intensity The lower the figure is the less the probe is influenced by external magnetic fields saturation A condition that occurs when the magnetic field strength in the probe core exceeds the maximum level that the core can absorb When saturation occurs the probe no longer responds linearly to an increase in magnetic field strength resulting in measurement inaccuracies A current overload condition will cause core saturation After saturation occurs the probe core usually retains residual magnetism which continues to produce inaccuracies until the probe is degaussed The probe should be degaussed after saturation occurs AM 503B amp AM 5030 Amplifier Instruction Manual Index Numbers 20MHz BW LIMIT button 2 10 20MHz BW LIMIT indicator 2 10 A A6302 amp A6302XL adjustments 6 3 bandwidth check 5 17 dc accuracy check 5 21 dc offset adjustment 6 3 performance verification 5 15 rise time check 5 19 A6303 amp A6303XL adjustments 6 7 bandwidth check 5 28 dc accuracy check 5 32 dc offset adjustment 6 8 gain adjustment 6 10 performance verification 5 27 rise time check 5 30 transient response adjustment 6 10 A6304XL adjustments 6 13 bandwidth check 5 40 dc accuracy adjustment 6 16 dc accuracy c
151. wing adjustment procedures describes how to adjust specific performance characteristics of the A6303 and the A6303XL Tolerances that are specified in these procedures apply to the current probes and do not include test equipment error Required Test Equipment To perform the adjustment procedures in this section you will need the test equipment listed in Table 6 4 The test equipment must meet or exceed the specifications listed The test procedures may need to be changed if the recommended equipment is not used Table 6 4 Required Test Equipment Recommended Qty Item Description Equipment 1 Oscilloscope 150 MHz bandwidth TDS 520B 1 Current Probe Amplifier AM 503B or AM 5030 1 Calibration Generator DC or 1 kHz square wave Wavetek 9100 with Option 5 Vp p into 50 250 or 0 596 vertical accuracy PG 506A equivalent 1 Current Loop 500 015 0601 50 1 Termination 50 BNC connector 011 0129 00 feedthrough 2 BNC Cables 50 Q 1 05 m 42 in long 012 0057 01 1 BNC T adapter 500 103 0030 00 AM 503B amp AM 5030 Amplifier Instruction Manual 6 7 A6303 and A6303XL Adjustments A6303 and A6303XL DC Offset Adjustment This procedure describes how to adjust the DC offset of the A6303 and A6303XL using the DC Offset adjustment Refer to Figure 6 2 when performing this procedure HF2 DC Offset 5 6303 or A6303XL HF3 Current Probe Figure 6 2 A6303 and A6303XL Adjustment Locations
152. y and or Component Attaching parts for Assembly and or Component END ATTACHING PARTS Detail Part of Assembly and or Component Attaching parts for Detail Part END ATTACHING PARTS Parts of Detail Part Attaching parts for Parts of Detail Part END ATTACHING PARTS Attaching parts always appear at the same indentation as the item it mounts while the detail parts are indented to the right Indented items are part of and included with the next higher indentation Attaching parts must be purchased separately unless otherwise specified Abbreviations Abbreviations conform to American National Standards Institute ANSI standard Y 1 1 8 2 AM 503B amp AM 5030 Amplifier Instruction Manual Er AM 503B amp AM 5030 Replaceable Parts Figure 8 1 AM 503B amp AM 5030 Replaceable Parts AM 503B amp AM 5030 Amplifier Instruction Manual 8 3 AM 503B amp AM 5030 Replaceable Parts Fig amp Index Tektronix Serial No No Part No Effective Dscont 8 1 1 337 3211 00 2 174 2314 00 174 2314 00 8 175 5534 00 4 160 9565 01 5 156 1415 00 6 156 1414 00 7 160 9569 00 010001 010099 160 9569 01 010100 019999 160 9569 01 010000 019999 160 9569 02 020000 8 146 0087 00 9 159 0204 00 10 211 0101 00 11 214 3406 00 12 426 0725 24 13 211 0101 00 14 214 3089 01 15 210 0406 00 16 386 4910 00 17 213 0882 00 18 211 0408 00 19 386 3657 01

Instruction Manual AM 503B & AM 5030 AC/DC Current

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Instruction Manual AM 503B &amp; AM 5030 AC/DC Current

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Instruction Manual AM 503B & AM 5030 AC/DC Current