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Reference Notes

Figure 11: Measuring differential current and nulls

3.

Measure the current. A waveform above the baseline indicates the conductor
with the conventional current

fl

ow (I

1

, in the direction of the probe arrow),

is carrying the greater current. Conventional current

fl

ows from positive to

negative.

4.

To adjust for a current null, adjust the current in one of the conductors until
the displayed measurement is zero.

TCPA300/400 Ampli

fi

ers and TCP300/400 Series Current Probes User Manual

23

Summary of Contents for TCP300 Series

Page 1: ...xx TCPA300 400 Amplifiers TCP300 400 Series AC DC Current Probes ZZZ User Manual P077118300 077 1183 00 ...

Page 2: ......

Page 3: ...TCPA300 400 Amplifiers TCP300 400 Series AC DC Current Probes ZZZ User Manual xx This document applies for firmware version 1 0 and above www tektronix com 077 1183 00 ...

Page 4: ... in this publication supersedes that in all previously published material Specifications and price change privileges reserved TEKTRONIX and TEK are registered trademarks of Tektronix Inc Additional trademark statements can be added here Contacting Tektronix Tektronix Inc 14200 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA For product information sales service and technical support In Nort...

Page 5: ...s 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...

Page 6: ......

Page 7: ...ary 15 TCPA300 and TCPA400 Controls 16 Reference Notes 21 Degaussing a Probe with an Unpowered Conductor in the Jaws 21 Measuring Differential Current 22 AC and DC Coupling 24 Maximum Current Limits 25 Measuring Noncontinuous Current with the TCP404XL Probe 28 Extending Current Range 30 Increasing Sensitivity 32 Application Notes 33 Automobile Charging Systems 33 Inductance Measurements 35 Continu...

Page 8: ...Nominal and Typical Characteristics 48 Mechanical Characteristics 49 Environmental Characteristics 51 Performance Graphs 52 TCP404XL Maximum Measurement Times 56 Safety Compliance Information 57 Glossary Index ii TCPA300 400 Amplifiers and TCP300 400 Series Current Probes User Manual ...

Page 9: ...Figure 18 Setup for measuring charging current 34 Figure 19 Charge current waveforms 34 Figure 20 Measuring inductance with a low impedance source 35 Figure 21 Linear current vs time ramp 36 Figure 22 High impedance source current ramp 37 Figure 23 Measuring the number of turns in a coil 38 Figure 24 Turns measurement using reference coil 38 Figure 25 Error code display 43 Figure 26 Interpreting t...

Page 10: ...or codes 44 Table 7 Warranted TCPA300 and TCPA400 specifications 47 Table 8 Nominal and typical amplifier characteristics 48 Table 9 TCPA300 and TCPA400 mechanical characteristics 49 Table 10 Probe mechanical characteristics 50 Table 11 Shipping weights and dimensions 50 Table 12 Environmental characteristics 51 Table 13 Safety compliance information 57 iv TCPA300 400 Amplifiers and TCP300 400 Ser...

Page 11: ...rence lead from the circuit under test before disconnecting the probe from the measurement instrument Ground the Product 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 Before making connections to the input or output terminals of the product ensure that the product is properly grounded Obs...

Page 12: ...ctices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property Symbols and Terms on the Product 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 t...

Page 13: ...nity IEC 61000 4 5 2001 Power line surge immunity IEC 61000 4 6 2003 Conducted RF immunity IEC 61000 4 11 2004 Voltage dips and interruptions immunity 4 EN 61000 3 2 2006 AC power line harmonic emissions EN 61000 3 3 1995 Voltage changes fluctuations and flicker European Contact Tektronix UK Ltd Western Peninsula Western Road Bracknell RG12 1RF United Kingdom 1 This product is intended for use in ...

Page 14: ...ations Act per the following standard CISPR 11 2003 Radiated and Conducted Emissions Group 1 Class A in accordance with EN 61326 1 2006 and EN 61326 2 1 2006 FCC EMC Emissions are within the limits of FCC 47 CFR Part 15 Subpart B for Class A equipment viii TCPA300 400 Amplifiers and TCP300 400 Series Current Probes User Manual ...

Page 15: ... to reduce the use of natural resources we encourage you to recycle this product in an appropriate system that will ensure that most of the materials are reused or recycled appropriately This symbol indicates that this product complies with the applicable European Union requirements according to Directives 2002 96 EC and 2006 66 EC on waste electrical and electronic equipment WEEE and batteries Fo...

Page 16: ...Compliance Information x TCPA300 400 Amplifiers and TCP300 400 Series Current Probes User Manual ...

Page 17: ...ation The Glossary and Index are provided as quick reference locators for important information Service Manual The Performance Verification and Adjustment procedures are located in the Service Manual and support the qualification and calibration of the probes when used with either amplifier The Maintenance section is also located in the Service Manual and supports the routine maintenance and repai...

Page 18: ...Preface xii TCPA300 400 Amplifiers and TCP300 400 Series Current Probes User Manual ...

Page 19: ...d probes provide these features Simultaneous DC and AC current measurements up to 750 A peak High sensitivity One button autobalancing and probe degaussing No adjustments needed to match a current probe to an individual amplifier AC or DC coupling of signal Direct scaling and unit readout on compatible TEKPROBE level II oscilloscopes System Configuration A complete current measurement system consi...

Page 20: ...th duty cycle You can also use the CT 4 High Current Transformer with the TCP305 and TCP312 current probes to extend the AC current measurement range to 20 000 peakA Oscilloscope An oscilloscope displays the output from the current measuring system A 50 Ω cable is included to connect the amplifier to the oscilloscope input channel A TEKPROBE to TEKPROBE interface cable is also included for connect...

Page 21: ...ions Option Description D1 Provides the initial Test Data Report from the factory on delivery C3 Provides factory calibration certification on delivery plus two more years of calibration coverage Throughout the coverage period the instrument will be calibrated according to its Recommended Calibration Interval D3 Provides test data on delivery plus a Test Data Report for every calibration performed...

Page 22: ...verification procedure for checking the performance of the TCPA300 Amplifier and the compatible probes CT 4 High Current Transformer If you need to measure high amplitude AC currents consider using the CT 4 with the TCP303 and TCP312 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 representative TCPA Calibration Adapter U...

Page 23: ...e the probe cover to hold your probe in a convenient place at your bench or workstation when you are not using it You can attach the probe cover to the side of the bench to keep the probe off of your work surface See Figure 2 Figure 2 Using the probe covers TCPA300 400 Amplifiers and TCP300 400 Series Current Probes User Manual 5 ...

Page 24: ...rent Probes one of each size For example you can store a TCP305 and a TCP303 probe A compartment is included to store associated cables and terminations See Figure 3 Figure 3 Equipment locations in the travel case 1 Large current probe 2 Probe holders 3 Small current probe 4 Amplifier 5 Cables and terminations 6 TCPA300 400 Amplifiers and TCP300 400 Series Current Probes User Manual ...

Page 25: ...width must be at least 500 MHz When using a TCP305 Current Probe the oscilloscope bandwidth must be at least 250 MHz After you have connected the amplifier to the oscilloscope allow the equipment to warm up to a stable temperature usually 20 minutes is required Power on the Amplifier Connect the power cord to the power input connector on the rear of the amplifier and then connect the power cord to...

Page 26: ...probe while the probe is clamped around a live conductor or the probe may suffer electrical damage If you connect a probe to the wrong amplifier for example a TCP312 to a TCPA400 the NONCOMPATIBLE PROBE TYPE LED illuminates Disconnect the probe and use the correct amplifier The TCPA400 amplifier accepts TCP3XX probes but will only operate properly with TCP4XX probes Each current probe is calibrate...

Page 27: ... to the probe or personal injury may result Only use the TCP305 or TCP312 current probes on INSULATED wires The TCP303 and TCP404XL current probes can be used to measure current on uninsulated wires However the circuit must be de energized when connecting or removing the current probe The slide operation of the TCP305 and TCP312 current probes is shown in the following illustration See Figure 5 To...

Page 28: ... the lock button 2 Squeeze the handle until the core is open 3 Place the probe core around the conductor Figure 6 Unlock and open the TCP303 and TCP404XL 4 To lock the probe release the squeeze handle 5 Press the top of the lock button Figure 7 Close and lock the TCP303 and TCP404XL 10 TCPA300 400 Amplifiers and TCP300 400 Series Current Probes User Manual ...

Page 29: ...nal magnetic field Periodically during normal use To degauss and autobalance a current probe perform these steps 1 Verify that the current probe is connected to the amplifier 2 Remove the current probe from the conductor under test 3 Lock the probe slide closed See Figure 5 See Figure 6 4 Press the amplifier PROBE DEGAUSS AUTOBALANCE button 5 Wait about five seconds for the degauss procedure to co...

Page 30: ... not 50 Ω If this is the case make necessary changes For example use a 50 Ω termination 5 After the degauss autobalance routine completes adjust the ground reference if necessary using the amplifier MANUAL BALANCE controls WARNING Do not clamp the TCP305 or TCP312 current probes around uninsulated wires Damage to the probe or personal injury may result Only use the TCP305 or TCP312 current probes ...

Page 31: ...Open the probe slide place the probe around the conductor under test and then lock the slide 2 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 display the current waveform upside down on the oscilloscope 3 Adjust the oscilloscope time base trigger and gain as needed Figure 8 Current pr...

Page 32: ...insulated wires Damage to the probe or personal injury may result Only use the TCP305 or TCP312 current probes on INSULATED wires The TCP303 and TCP404XL current probes can be used to measure current on uninsulated wires However the circuit must be de energized when connecting or removing the current probe 5 Open the probe slide place the probe around the conductor under test and then lock the sli...

Page 33: ...magnetism from the attached current probe A multi color LED indicates the status of the degauss circuit 2 The MANUAL BALANCE buttons allow you to fine adjust DC offset from the amplifier The adjacent LED lights when one of the buttons has been pressed 3 The four probe error lights indicate the following faults PROBE OPEN OVERLOAD current or temperature NOT TERMINATED INTO 50 Ω and NONCOMPATIBLE PR...

Page 34: ...ed to degauss the probe at times when the PROBE DEGAUSS AUTOBALANCE light is not blinking red The red blinking light serves as a reminder to degauss the current probe when one of the following conditions occurs The amplifier has just been turned on with a current probe connected The current probe has been changed An overload was detected To perform the probe degauss autobalance function remove the...

Page 35: ...gh termination at the amplifier end of the BNC connecting cable MANUAL BALANCE Buttons and Indicator The MANUAL BALANCE buttons allow you to fine adjust the DC offset that appears at the amplifier OUTPUT connector The manual balance adjustment only functions when the amplifier is set to DC coupling and the MANUAL BALANCE indicator is only lighted after you press one of the MANUAL BALANCE buttons i...

Page 36: ...s a probe is not connected to the amplifier COUPLING Button and Indicators The COUPLING button determines the coupling between the TCPA300 TCPA400 and the oscilloscope Press the COUPLING button to toggle between AC and DC coupling To couple the amplifier for DC plus AC measurements use DC coupling For AC measurements only use AC coupling When the amplifier is set to AC coupling the Manual Balance ...

Page 37: ... 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 you can manually adjust the gain of the probe See the service manual for adjustment procedures and locations NOTE You should be careful to note the existing position of the DC Gain Adjus...

Page 38: ...Control Summary Refer to your oscilloscope manual for instructions on using the GPIB bus 20 TCPA300 400 Amplifiers and TCP300 400 Series Current Probes User Manual ...

Page 39: ...ill cause a residual offset in the current probe and the amplifier may report an inaccurate result If the impedance of your circuit is higher than that shown the degauss procedure succeeds because the amplifier is able to saturate the probe core See Figure 11 on page 23 While degauss occurs the probe induces a voltage in the unpowered circuit as shown See Figure 11 on page 23 Your circuit must be ...

Page 40: ...ed as any conductor that is surrounded by an insulating material that is capable of isolating the voltage present on the conductor Note that lacquer coatings like those typically found on transformer windings do not provide sufficient reliable insulation for use with current probes The lacquer coating can be easily nicked or damaged compromising the insulating capabilities of the lacquer coating D...

Page 41: ...th the conventional current flow I1 in the direction of the probe arrow is carrying the greater current Conventional current flows from positive to negative 4 To adjust for a current null adjust the current in one of the conductors until the displayed measurement is zero TCPA300 400 Amplifiers and TCP300 400 Series Current Probes User Manual 23 ...

Page 42: ...ee Figure 12 1 A low frequency square wave using AC coupling The signal exhibits low frequency rolloff 2 By changing the amplifier coupling to DC the pulse is displayed as truly square as shown Figure 12 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 pe...

Page 43: ...tely 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...

Page 44: ...llowable pulse width PWmax For example the TCP312 Current Probe has a maximum Ampere second product of 500 Arms in the 10 A V range setting If a pulse measured with a TCP312 has a peak current of 40 A the maximum allowable pulse width would be 500 Arms divided by 40 A or 12 5 μs 3 Check that the pulse width at the 50 point of the measured signal is less than the calculated maximum allowable pulse ...

Page 45: ... by the pulse width The quotient is the maximum allowable pulse amplitude the peak amplitude of the measured pulse must be less than this value For example the TCP312 Current Probe has a maximum Ampere second product of 500 Arms in the 10 A V range setting If a pulse measured with a TCP312 probe has a width of 15 μs the maximum allowable peak current would be 500 Arms divided by 15 μs or 33 3 A TC...

Page 46: ...late the duty cycle See Figure 14 Figure 14 Duty cycle calculation After you calculate the duty cycle of the noncontinuous current you are measuring you can use the other factors continuous and noncontinuous current amplitude etc to compare your measurement to those shown See Figure 34 on page 56 See Figure 36 on page 57 You can see how duty cycle affects the measurement time by looking at any of ...

Page 47: ...sus 17 minutes for a smaller noncontinuous current amplitude of 600 A By looking at any of the three graphs you can also see that when you measure a noncontinuous current having the same amplitude and duty cycle the measurement time decreases as the continuous current amplitude increases Finally compare the two graphs See Figure 34 on page 56 See Figure 36 on page 57 Here the effect of ambient tem...

Page 48: ...e of your probe you can add offset bucking current with a second conductor WARNING To avoid injury or loss of life from shock or fire do not put more than one uninsulated conductor at a time in the probe jaws An uninsulated conductor is defined as any conductor without insulation or without insulation rated for the voltage present on the conductor under test To supply additional bucking current do...

Page 49: ...ine measurement values add the value of the bucking current to the displayed measurement NOTE Winding multiple turns to the probe increases the insertion impedance and reduces the upper bandwidth limit of the probe Extending AC Range You can extend the AC amplitude limit of the TCPA300 by using the Tektronix CT 4 High Current Transformer The CT 4 designed for use with the TCP305 and TCP312 current...

Page 50: ...ined as any conductor without insulation or without insulation rated for the voltage present on the conductor under test 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 i...

Page 51: ...iode is shorted or open See Figure 19 on page 34 A TCP303 Current Probe was used for this high current low voltage application The TCP303 is degaussed and clamped around the positive battery lead from the alternator See Figure 18 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 ar...

Page 52: ...proximately 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 waveform b See Figure 19 Figure 19 Charge current waveforms 34 TCPA300 400 Amplifiers and TCP300 400 Series Current Probes Us...

Page 53: ...nnected to an inductor that has low resistance See Figure 20 1 Connect the inductor across the output terminals of the pulse generator 2 Maintain a constant voltage across the inductor 3 Clamp the current probe over one of the source leads Figure 20 Measuring inductance with a low impedance source NOTE If the probe impedance is a significant part of the total circuit inductance measurement accurac...

Page 54: ...mp shown here Figure 21 Linear current vs time ramp 5 Calculate the inductance using the following formula where L is the inductance in henries E is the voltage of the pulse generator dt is the change in time and di is the change in current 36 TCPA300 400 Amplifiers and TCP300 400 Series Current Probes User Manual ...

Page 55: ...he 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 Figure 22 High impedance source current ramp Continuity Test of Multiple Conductor Cable Single conductors in a multiconductor cable can be tested with the TCPA300 and TCPA400 To check a conductor clamp the current probe around the cable bundle and check for a spec...

Page 56: ...tio 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 turns count you need a coil with a known number of turns to use as a reference 1 Repeat steps 1 and 2 above and make the following changes 2 Insert the reference coil into the current probe 3 Insert the test co...

Page 57: ...nt measurement system into a sophisticated analysis tool that quickly measures and analyzes many different applications such as Power dissipation at switching devices and magnetic components in switching power supplies Precompliance test for EN61000 3 2 standard Power quality Modulation analysis After making the measurements the software generates detailed test reports in customizable formats When...

Page 58: ...es 15 minutes is sufficient All LEDs are flashing All LEDs flashing indicates a thermal shutdown Power cycle the system and let it cool before taking measurements In most cases 15 minutes is sufficient OVERLOAD LED remains lit red after removing probe from circuit Probe transformer or amplifier main board is defective OVERLOAD LED remains lit orange Degauss the probe If the OVERLOAD LED remains li...

Page 59: ...tons to null out any residual DC offset after performing a Probe Degauss Autobalance routine Measurements are inaccurate Degauss the probe The amplifier output is not terminated into 50 Ω load Set the input impedance of oscilloscope to 50 Ω or connect a 50 Ω feedthrough termination at the oscilloscope input Do not attach the termination at the amplifier output The measurement exceeds the maximum c...

Page 60: ...probe transformer and lid Degauss the probe The amplifier or the oscilloscope may be AC coupled Set the COUPLING to DC Measurements exhibit excessive delay or slowed pulse response The amplifier output is not terminated into 50 Ω load Set the input impedance of the oscilloscope to 50 Ω or connect a 50 Ω feedthrough termination at the oscilloscope input Do not attach the termination to the amplifie...

Page 61: ...re being displayed instead of normal conditions 3 The four fault indicator LEDs above the ON STANDBY switch are used to form a four bit binary error code See Figure 26 on page 44 The error codes are defined in the table See Table 6 on page 44 The PROBE OPEN LED indicates the most significant bit MSB and the NONCOMPATIBLE PROBE TYPE LED indicates the least significant bit LSB 4 To continue past an ...

Page 62: ...n error occurred while nulling out the internal DC offset of the amplifier Power cycle the amplifier and run the Degauss Autobalance adjustment routine again If the error reoccurs then the amplifier needs service 4 5 TCPA300 ONLY An error occurred while the amplifier was adjusting the power supply levels for the different Range settings Power cycle the amplifier and run the Degauss Autobalance adj...

Page 63: ...ier needs service 15 Unspecified error internal software error Power cycle the amplifier and run the Degauss Autobalance adjustment routine again If the error reoccurs then the amplifier needs service Correcting the Cause of an Error Code After interpreting the error code disconnect the probe from the circuit and degauss the probe again Take the measurement again If the error code persists contact...

Page 64: ...Troubleshooting and Error Codes 46 TCPA300 400 Amplifiers and TCP300 400 Series Current Probes User Manual ...

Page 65: ...r output is properly terminated into 50 Ω Specifications are separated into two categories warranted specifications and nominal or typical characteristics Warranted Specifications Warranted specifications Table 4 1 are guaranteed performance specifications unless specifically designated as typical or nominal Table 7 Warranted TCPA300 and TCPA400 specifications Amplifier TCPA300 TCPA400 DC Gain Acc...

Page 66: ...ent bandwidth to 20 MHz 70 mARMS Limit measurement bandwidth to 20 MHz Signal Delay typical 1 approximately 17 ns approximately 19 ns approximately 53 ns approximately 103 ns Maximum Bare Wire Voltage Use with insulated wires only Use with insulated wires only 600 V RMS CAT I II 300 VRMS CAT III 600 V RMS CAT I II 300 VRMS CAT III Lowest Measurable Current 1 mA 5 mA 5 mA 1 A 1 MHz 0 08 Ω 1 MHz 0 0...

Page 67: ... 500 A Input Voltage 100 240 VAC 10 47 Hz to 440 Hz single phase Maximum Power 50 Watts maximum Fuse Rating 3 15 AH 250 V Not operator replaceable 1 Includes probe amplifier and TEKPROBE to TEKPROBE interface cable or 012 0117 xx BNC cable Mechanical Characteristics Table 9 TCPA300 and TCPA400 mechanical characteristics Parameter nominal Characteristic Length 173 mm 6 8 in Width 91 4 mm 3 6 in Hei...

Page 68: ... kg 1 90 lb Figure 27 Probe jaw dimensions nominal Table 11 Shipping weights and dimensions TCPA300 and TCPA400 Amplifiers TCP305 and TCP312 TCP303 TCP404XL Dimensions Length 298 5 mm 11 75 inches 330 mm 13 00 inches 375 mm 14 75 inches 375 mm 14 75 inches Width 298 5 mm 11 75 inches 254 mm 10 00 inches 318 mm 12 50 inches 318 mm 12 50 inches Height 254 mm 10 00 inches 108 mm 4 25 inches 127 mm 5 ...

Page 69: ...Nonoperating 40 C to 75 C 40 F to 167 F Humidity Operating 5 to 95 R H to 30 C 86 F 5 to 85 R H 30 C to 50 C 86 F to 122 F Nonoperating 5 to 95 R H to 30 C 86 F 5 to 85 R H 30 C to 75 C 86 F to 167 F Altitude Operating 2000 m 6800 ft maximum Nonoperating 12 192 m 40 000 ft maximum Random Vibration Amplifiers Operating 0 31 gRMS 5 Hz to 500 Hz 10 minutes each axis Nonoperating 2 46 gRMS 5 Hz to 500...

Page 70: ...cations Performance Graphs Figure 28 Frequency derating TCP312 Figure 29 Frequency derating TCP305 Figure 30 Frequency derating TCP303 52 TCPA300 400 Amplifiers and TCP300 400 Series Current Probes User Manual ...

Page 71: ...Specifications Figure 31 Frequency derating TCP404XL TCPA300 400 Amplifiers and TCP300 400 Series Current Probes User Manual 53 ...

Page 72: ...Specifications Figure 32 Insertion impedance versus frequency 54 TCPA300 400 Amplifiers and TCP300 400 Series Current Probes User Manual ...

Page 73: ...Specifications Figure 33 Specified operating area of the probes TCPA300 400 Amplifiers and TCP300 400 Series Current Probes User Manual 55 ...

Page 74: ...wing three graphs Details about the relationship between measurement factors are available See page 28 Measuring Noncontinuous Current with the TCP404XL Probe Figure 34 Measuring 750A noncontinuous at 50 C ambient temperature Figure 35 Measuring 600A noncontinuous at 50 C ambient temperature 56 TCPA300 400 Amplifiers and TCP300 400 Series Current Probes User Manual ...

Page 75: ...C amended by 93 68 EEC EN 61010 1 A2 1995 Safety requirements for electrical equipment for measurement control and laboratory use EN 61010 2 032 1995 Particular requirements for hand held current clamps for electrical measurement and test equipment U S Nationally Recognized Testing Laboratory Listing UL3111 1 Standard for electrical measuring and test equipment UL3111 2 032 Standard for hand held ...

Page 76: ... be the same as the external Products should be used only in the environment for which they are rated Pollution Degree 1 No pollution or only dry nonconductive pollution occurs Products in this category are generally encapsulated hermetically sealed or located in clean rooms Pollution Degree 2 Normally only dry nonconductive pollution occurs Occasionally a temporary conductivity that is caused by ...

Page 77: ...tive 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 pro...

Page 78: ... circuit 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 leve...

Page 79: ... E electron current 59 See also conventional current Error Codes correcting 45 displaying 43 shutdown error 45 Extending the current range of the probes 30 F flux 59 Frequency derating 25 Front panel controls 15 G Gauss 59 GPIB Operation 19 H Hall device 60 Hall effect 60 I Increasing bucking current 30 Increasing probe sensitivity 32 Indicator COUPLING 18 MANUAL BALANCE 17 NONCOMPATIBLE PROBE TYP...

Page 80: ...4 degaussing demagnetizing 11 16 description 2 extending the current range 30 increasing the current limit 30 maximum current limits 25 operating the probe slide 9 saturation 25 R RANGE button and indicator 18 S Safety Summary v saturation 60 Shutdown error 45 Specifications 47 Standard Accessories 4 susceptibility 60 T TCP404XL maximum measurement times 28 56 TEKPROBE to TEKPROBE interface cable ...

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