Tektronix TCP300 Series User Manual
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Tektronix TCP300 Series User Manual

Amplifiers & ac/dc current probes
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TCPA300/400 Amplifiers &
TCP300/400 Series AC/DC Current Probes
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  • Page 1 TCPA300/400 Amplifiers & TCP300/400 Series AC/DC Current Probes User Manual *P077118300* 077-1183-00...
  • Page 3 TCPA300/400 Amplifiers & TCP300/400 Series AC/DC Current Probes User Manual This document applies for firmware version 1.0 and above. www.tektronix.com 077-1183-00...
  • Page 4 Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or suppliers, and are protected by national copyright laws and international treaty provisions. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material.
  • Page 5 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.

  • Page 7: Table Of Contents

    Table of Contents General Safety Summary ..................Compliance Information ..................EMC Compliance.................... Environmental Considerations ................Preface ......................Manual Conventions..................Getting Started ...................... System Configuration ..................Options......................Standard Accessories ..................Optional Accessories ..................Probe Covers ....................Travel Case ..................... Connecting the Amplifier to an Oscilloscope............... Power on the Amplifier ..................
  • Page 8 Table of Contents Shutdown Error ....................Specifications ...................... Warranted Specifications..................Nominal and Typical Characteristics ............... Mechanical Characteristics .................. Environmental Characteristics ................Performance Graphs ..................TCP404XL Maximum Measurement Times............... Safety Compliance Information ................Glossary Index TCPA300/400 Amplifiers and TCP300/400 Series Current Probes User Manual...
  • Page 9 List of Figures Figure 1: Typical TCPA300/400 current measurement system..........Figure 2: Using the probe covers ................. Figure 3: Equipment locations in the travel case ............... Figure 4: Connecting and disconnecting a current probe to the amplifier........Figure 5: TCP312 and TCP305 slide operation ..............Figure 6: Unlock and open the TCP303 and TCP404XL .............
  • Page 10 Table of Contents List of Tables Table 1: Amplifier options..................Table 2: Service options ................... Table 3: Unpowered circuit degauss limits ..............Table 4: Automobile charging systems test setup.............. Table 5: Troubleshooting ..................Table 6: Amplifier error codes ................... Table 7: Warranted TCPA300 and TCPA400 specifications ..........Table 8: Nominal and typical amplifier characteristics............

  • Page 11: General Safety Summary

    General Safety Summary General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. Only qualified personnel should perform service procedures. While using this product, you may need to access other parts of a larger system.
  • Page 12 General Safety Summary Do Not Operate in Wet/Damp Conditions. Do Not Operate in an Explosive Atmosphere. Keep Product Surfaces Clean and Dry. Provide Proper Ventilation. Refer to the manual’s installation instructions for details on installing the product so it has proper ventilation. Terms in this Manual These terms may appear in this manual: WARNING.

  • Page 13: Compliance Information

    IEC 61000-4-6:2003. Conducted RF immunity IEC 61000-4-11:2004. Voltage dips and interruptions immunity 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 This product is intended for use in nonresidential areas only.
  • Page 14 Compliance Information Australia / New Zealand Complies with the EMC provision of the Radiocommunications Act per the following standard. Declaration of Conformity – EMC 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 –...

  • Page 15: Environmental Considerations

    Union requirements according to Directives 2002/96/EC and 2006/66/EC on waste electrical and electronic equipment (WEEE) and batteries. For information about recycling options, check the Support/Service section of the Tektronix Web site (www.tektronix.com). Restriction of Hazardous This product has been classified as Monitoring and Control equipment, and is outside the scope of the 2002/95/EC RoHS Directive.
  • Page 16 Compliance Information TCPA300/400 Amplifiers and TCP300/400 Series Current Probes User Manual...

  • Page 17: Preface

    Preface This User Manual supports the operation and basic maintenance of the TCPA300 and TCPA400 Current Probe Amplifiers, and the TCP300/400 Series AC/DC current probes that mate with the amplifiers. The current probes covered in this manual are listed below: TCP312 (30 A, 100 MHz, compatible with TCPA300) TCP305 (50 A, 50 MHz, compatible with TCPA300) TCP303 (150 A, 15 MHz, compatible with TCPA300)
  • Page 18 Preface TCPA300/400 Amplifiers and TCP300/400 Series Current Probes User Manual...

  • Page 19: Getting Started

    Getting Started The TCPA300 and TCPA400 current probe amplifiers let you use one probe to simultaneously measure AC and DC current. The amplifiers convert the sensed current into a proportional voltage signal that you can measure directly with an oscilloscope. The TCPA300 and TCPA400 current probe amplifiers provide better linearity than other current measurement systems because of a current feedback process used with the probe.
  • Page 20 Current Probe Amplifiers measuring device. Current Probes The following Tektronix current probes are compatible with the TCPA300 Amplifier: TCP312 (30 A, 100 MHz) TCP305 (50 A, 50 MHz)

  • Page 21: Options

    China power cord No power cord Tektronix service options that you can order for your amplifiers and probes are listed in this section. (See Table 2.) Designed to support tracking of calibration to requirements of ISO9000 and to provide for extended repair coverage, these options help fix your long-term maintenance costs and eliminate unplanned...

  • Page 22: Standard Accessories

    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. Use the TCPA Calibration Adapter to verify the amplifier(s) performance independent of the current probes.

  • Page 23: Probe Covers

    Getting Started Probe Covers The TCP300/400 Series Current Probes come with a probe cover that stores the probe when not in use. Use 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.

  • Page 24: Travel Case

    Getting Started Travel Case The travel case is a recommended accessory for the TCPA300/400 Amplifiers. The travel case includes room to store one amplifier and two TCP300/400 Series Current 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.

  • Page 25: Connecting The Amplifier To An Oscilloscope

    Getting Started Connecting the Amplifier to an Oscilloscope You will need an oscilloscope to display the TCPA300 and TCPA400 measurement output. To use the full dynamic range of the probe/amplifier combination, the oscilloscope must be capable of displaying a vertical scale factor of 1 mV/div to 1 V/div.

  • Page 26: Connecting A Current Probe To The Amplifier

    If a probe requires adjustment, information is available in the service manual. The adjustment procedure must be performed only by qualified service personnel. Contact your nearest Tektronix Service Center if you need more assistance. TCPA300/400 Amplifiers and TCP300/400 Series Current Probes User Manual...

  • Page 27: Operating The Current Probe Slide

    Getting Started 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.

  • Page 28: Figure 6: Unlock And Open The Tcp303 And Tcp404Xl

    Getting Started The slide operation of the TCP303 and TCP404XL current probes is shown in the following illustrations. To open the probe: 1. Press the bottom of 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.

  • Page 29: Degaussing And Autobalancing The Current Probe

    Getting Started 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. The DEGAUSS LED flashes until you degauss the probe.

  • Page 30: Dc Measurements

    Getting Started DC Measurements To measure DC current, first degauss the probe: 1. Verify that the amplifier and the oscilloscope input coupling are set to DC, and the input impedance is set to 50 Ω. 2. Lock the probe closed without a conductor passing through it. 3.

  • Page 31: Figure 8: Current Probe Polarity

    Getting Started The current probe is shown connected to a power supply line. (See Figure 8.) 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 (-). To measure DC current, perform these steps: 1.

  • Page 32: Ac Measurements

    Getting Started AC Measurements 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 2 is set to AC. 1.

  • Page 33: Control Summary

    Control Summary This section describes the function of each TCPA300 and TCPA400 front panel control and connector. The overview shows most functions and is followed by a detailed description. (See Figure 9.) Some seldom-used functions do not appear in the illustration. These functions are completely discussed in the detailed descriptions that follow this illustration.

  • Page 34: Tcpa300 And Tcpa400 Controls

    Control Summary 6. The current probes connect to the TCPA300 and TCPA400 at the PROBE INPUT connector. 7. The COUPLING button selects AC or DC probe coupling, as indicated by the LEDs. 8. The RANGE button toggles between the two scale factors that are available for the attached probe (TCPA300 only).
  • Page 35 Control Summary buttons, another degauss operation may be necessary to ensure accurate measurements. Generally, if you change the DC offset by more than 5 divisions, you should de-energize the circuit under test and perform another degauss routine. Then, reenergize the circuit and take your measurements. If the degauss operation has failed, and the AC and DC COUPLING LEDs are alternately flashing, this indicates the amplifier is displaying an error code with the four status LEDs on the lower-left front panel.
  • Page 36 Control Summary NOT TERMINATED When lit, this indicator informs you that the TEKPROBE interface cable or BNC cable from the OUTPUT of the amplifier is not connected to a 50 Ω input on the oscilloscope. You need to switch the termination setting on the oscilloscope to 50 Ω, or use a 50 Ω...
  • Page 37 BNC cable to this connector and the other end to a 50 Ω vertical input of your oscilloscope. The output impedance of the amplifier is 50 Ω. To get a direct readout of current on your Tektronix oscilloscope, use the TEKPROBE interface cable to connect the amplifier to your oscilloscope.
  • Page 38 Control Summary Refer to your oscilloscope manual for instructions on using the GPIB bus. TCPA300/400 Amplifiers and TCP300/400 Series Current Probes User Manual...

  • Page 39: Reference Notes

    Reference Notes These notes are provided to help you utilize the full potential of the TCPA300 and TCPA400 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.

  • Page 40: Measuring Differential Current

    Reference Notes Measuring Differential Current You can place two conductors in a current probe to provide differential or null current measurement. (See Figure 10.) This avoids the necessity of using two current measurement systems with a differential oscilloscope. Figure 10: Measuring two conductors WARNING.

  • Page 41: Figure 11: Measuring Differential Current And Nulls

    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 flow (I , in the direction of the probe arrow), is carrying the greater current. Conventional current flows from positive to negative.

  • Page 42: Ac And Dc Coupling

    Reference Notes AC and DC Coupling You can couple the signal input to the TCPA300 and TCPA400 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 coupling, make sure that the input DC current does not exceed the probe specifications.

  • Page 43: Maximum Current Limits

    Reference Notes Maximum Current Limits Current probes have three maximum current ratings: continuous, pulsed, and Ampere-second product. Exceeding any of these ratings can saturate the probe core, magnetizing the core and causing measurement errors. Maximum Continuous Current refers to the maximum current that can be continuously measured at DC or at a specified AC frequency.

  • Page 44: Figure 13: Applying The Amp-Second Product Rule

    Reference Notes Procedure A: Maximum To determine the maximum allowable pulse width do the following: Allowable Pulse Width 1. Measure the peak current of the pulse. 2. Divide the Ampere-second (or Ampere-microsecond) specification for the range setting of the probe by the measured peak current of the pulse. The quotient is the maximum allowable pulse width (PW For example, the TCP312 Current Probe has a maximum Ampere-second product of 500 Arms in the 10 A/V range setting.
  • Page 45 Reference Notes Procedure B: Maximum To determine the maximum allowable pulse amplitude do the following: Allowable Pulse Amplitude 1. Measure the pulse width at the 50% points. 2. Divide the Ampere-second (or Ampere-microsecond) specification for the range setting of the probe by the pulse width. The quotient is the maximum allowable pulse amplitude;...

  • Page 46: Measuring Noncontinuous Current With The Tcp404Xl Probe

    Reference Notes Measuring Noncontinuous Current with the TCP404XL Probe When you measure a noncontinuous current with the TCP404XL probe, you need to take into consideration several factors to ensure that you make accurate measurements and do not trip the thermal overload circuit. The amplitude and duty cycle of the continuous and noncontinuous current, and the ambient temperature, all affect the maximum amount of time allowed for the measurement, which defines the safe operating area of the probe.
  • Page 47 Reference Notes WARNING. To prevent injury, keep your hands away from the probe head until it has had time to cool after disconnecting the probe from the circuit. Because when using the probe near the upper current limit and maximum ambient temperature for extended lengths of time, the probe head surface can become hot to the touch.

  • Page 48: Extending Current Range

    Reference Notes Extending Current Range 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 loss of life due to shock or fire, do not exceed the specified electrical limits of the TCPA300 and TCPA400 or any applicable accessories.

  • Page 49: Figure 16: Adding Multiple Turns

    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 probes, extends the current probe range by a factor of 20:1 or 1000:1.

  • Page 50: Increasing Sensitivity

    Reference Notes 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. The signal is multiplied by the number of turns around the probe.

  • Page 51: Application Notes

    Application Notes Application Notes This section describes some of the typical measurement applications of the TCPA300 and TCPA400 Current Probe Amplifiers: Automobile Charging Systems Inductance Measurements Continuity Test of Multiple-Conductor Cable Measuring Inductor Turns Count Power Measurement and Analysis Software Applications Automobile Charging Systems Most automotive charging systems are three-phase alternators with a diode rectifier network.

  • Page 52: Figure 18: Setup For Measuring Charging Current

    Application Notes Figure 18: Setup for measuring charging current The waveform (a) shows the three-phase ripple frequency. (See Figure 19.) The average charge current is approximately 27 A with a minimum peak of approximately 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.

  • Page 53: Inductance Measurements

    Application Notes Inductance Measurements You can use the TCPA300 and TCPA400 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. Low-Impedance Pulse This figure shows a constant-voltage pulse generator of extremely low output impedance connected to an inductor that has low resistance.

  • Page 54: Figure 21: Linear Current Vs. Time Ramp

    Application Notes 4. Measure the current ramp. The inductance is effectively defined by the slope of the current ramp 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.

  • Page 55: Continuity Test Of Multiple-Conductor Cable

    Application Notes High-Impedance Pulse If the pulse source has a higher impedance of known resistance, such that the output voltage drops as the current increases, the inductance of a coil can be Sources calculated by the time constant of the charge curve. The current ramp shows how the values for the inductance formula are obtained.

  • Page 56: Measuring Inductor Turns Count

    Application Notes Measuring Inductor Turns Count To obtain an approximate turns count of an inductor, do the following. (See Figure 23.) 1. Connect the inductor to a current limited source, as shown. 2. Measure the input current on one of the inductor leads. 3.

  • Page 57: Power Measurement And Analysis Software

    Modulation analysis After making the measurements, the software generates detailed test reports in customizable formats. When the software is used with a Tektronix TDS5000 Series or TDS7054/TDS7104 digital phosphor oscilloscope and differential voltage and current probes, it forms a complete measurement system for power supply design and test.

  • Page 58: Troubleshooting And Error Codes

    Troubleshooting and Error Codes Troubleshooting and Error Codes Possible problems that you may encounter when measuring current with the TCPA300 and TCPA400 are available. (See Table 5.) Use this as a quick troubleshooting reference. Table 5: Troubleshooting Problem Remedy Amplifier will not power on Check that the amplifier is plugged into a working AC outlet.
  • Page 59 Troubleshooting and Error Codes Table 5: Troubleshooting (cont.) Problem Remedy Degauss takes longer than 10 seconds Probe is attached to an energized circuit. Disconnect probe from circuit and retry. Probe is faulty - Probe transformer (defective Hall device with excessive noise or drift) may cause this symptom.
  • Page 60 Troubleshooting and Error Codes Table 5: Troubleshooting (cont.) Problem Remedy Measurement aberrations exceed the The amplifier output is not terminated into 50 Ω load. Set the input impedance of the specified limit oscilloscope to 50 Ω or connect a 50 Ω feedthrough termination at the oscilloscope input. Do not attach the termination to amplifier output.

  • Page 61: Displaying Error Codes With The Probe Degauss Autobalance Button

    Troubleshooting and Error Codes Displaying Error Codes with the Probe Degauss Autobalance Button This section describes the error codes that the amplifiers display using the function indicator LEDs. When an internal error condition exists, the amplifiers may generate error codes. To display the error codes, do the following.

  • Page 62: Figure 26: Interpreting The Error Code Display

    Troubleshooting and Error Codes For example, after you press the PROBE DEGAUSS AUTOBALANCE button, if the AC and DC Coupling LEDs are flashing, then an error code is being displayed: 1. In this example, the NOT TERMINATED INTO 50 Ω LED is illuminated. 2.

  • Page 63: Correcting The Cause Of An Error Code

    If the measurement you were taking was within the probe and amplifier specifications, degauss the probe and take the measurement again. If the shutdown error persists, contact your Tektronix Service Center. TCPA300/400 Amplifiers and TCP300/400 Series Current Probes User Manual...
  • Page 64 Troubleshooting and Error Codes TCPA300/400 Amplifiers and TCP300/400 Series Current Probes User Manual...

  • Page 65: Specifications

    Specifications These specifications are valid only under the following conditions: The probe and amplifier have been calibrated at an ambient temperature of 23 ° ±5 °C. The probe and amplifier are operating within the environmental limits described in Table 4-6 on page 4-5 (the operating temperature limits are 0 °C to +50 °C, unless otherwise stated).

  • Page 66: Nominal And Typical Characteristics

    Specifications Nominal and Typical Characteristics Nominal and typical characteristics, listed in Table 4-2, are not guaranteed. They are provided to characterize the configuration, performance, or operation of typical probe/amplifier combinations. Table 8: Nominal and typical amplifier characteristics Installed probe Parameter TCP312 TCP305 TCP303...

  • Page 67: Mechanical Characteristics

    Specifications Table 8: Nominal and typical amplifier characteristics (cont.) Installed probe Parameter TCP312 TCP305 TCP303 TCP404XL Low Current Sensitivity 1 A/V Range 5 A/V Range 5 A/V Range Range — DC (continuous) 25 A 25 A — DC (noncontinuous) — RMS (sinusoidal) 3.5 A 17.7 A...

  • Page 68: Figure 27: Probe Jaw Dimensions (Nominal)

    Specifications Table 10: Probe mechanical characteristics TCP305 and TCP312 TCP303 and TCP404XL Probe dimensions Length: 20 cm (7.77 inches) 268 mm (10.55 inches) Width: 1.6 cm (0.625 inches) 41 mm (1.60 inches) Height: 3.2 cm (1.25 inches) 68 mm (2.7 inches) Cable length 1.5 m (5 feet) TCP303: 2 m (6.6 feet)

  • Page 69: Environmental Characteristics

    Specifications Environmental Characteristics The environmental characteristics are warranted performance specifications. (See Table 12.) Unlike the warranted characteristics, the environmental characteristics are type tested; therefore there are no performance verification procedures provided to test these characteristics. Unless otherwise noted, these characteristics apply to all probes and amplifiers.

  • Page 70: Performance Graphs

    Specifications Performance Graphs Figure 28: Frequency derating-TCP312 Figure 29: Frequency derating-TCP305 Figure 30: Frequency derating-TCP303 TCPA300/400 Amplifiers and TCP300/400 Series Current Probes User Manual...

  • Page 71: Figure 31: Frequency Derating-Tcp404Xl

    Specifications Figure 31: Frequency derating-TCP404XL TCPA300/400 Amplifiers and TCP300/400 Series Current Probes User Manual...

  • Page 72: Figure 32: Insertion Impedance Versus Frequency

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

  • Page 73: Figure 33: Specified Operating Area Of The Probes

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

  • Page 74: Tcp404Xl Maximum Measurement Times

    Specifications TCP404XL Maximum Measurement Times The maximum measurement time for the TCP404XL probe with varying duty cycles and temperatures are shown in the following 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 TCPA300/400 Amplifiers and TCP300/400 Series Current Probes User Manual...

  • Page 75: Safety Compliance Information

    Specifications Figure 36: Measuring 750A noncontinuous at 23 °C ambient temperature At 23 degrees ambient temperature, 600 A can be measured continuously with the TCP404XL probe. Emissions which exceed the levels required by this standard may occur when this equipment is connected to a test object. Safety Compliance Information Table 13: Safety compliance information Category...
  • Page 76 Specifications Table 13: Safety compliance information (cont.) Category Standards or description Additional Compliance UL 61010B-1. Safety requirements for electrical equipment for measuring, controlling and laboratory use. IEC61010-1/A2:1995. Safety requirements for electrical equipment for measurement, control, and laboratory use. IEC 61010-2-032:1995. Particular requirements for hand-held current clamps for electrical measurement and test.

  • Page 77: Glossary

    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.
  • Page 78 Glossary 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.
  • Page 79 Index Current limitations Indicator amp-second product, 25 COUPLING, 18 AC coupling, 14, 18, 24 maximum continuous, 25 MANUAL BALANCE, 17 amp-second product, 59 maximum pulsed, 25 NONCOMPATIBLE PROBE Amp-second product, 25 TYPE, 18 Applications, 33 NOT TERMINATED INTO auto-balance, 59 50 OHMS, 18 Autobalance function, 16 DC coupling, 18, 24...
  • Page 80 Index PROBE INPUT connector, 18 PROBE OPEN indicator, 17 ON/STANDBY button, 18 Safety Summary, v Probes Optional Accessories, 4 saturation, 60 coupling, 24 Options, 3 Shutdown error, 45 degaussing OUTPUT connector, 19 Specifications, 47 (demagnetizing), 11, OVERLOAD indicator, 17 Standard Accessories, 4 susceptibility, 60 description, 2 extending the current...

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