Tektronix P5102 100 MHz High-Voltage Probe

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 all safety summaries prior to performing service.

Website: www.tektronix.com

Copyright and Trademarks

Copyright © Tektronix, Inc. All rights reserved.

Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Specifications and price change privileges reserved.

Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077 USA

TEKTRONIX, TEK, TekTools, and TekScope 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 purchase from an authorized Tektronix distributor. If any such 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. Batteries are excluded from this warranty.

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, shipping charges prepaid, and with a copy of customer proof of purchase. 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 repair damage resulting from improper use of connection to incompatible equipment; or d) to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or 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.

Contacting Tektronix

Phone: 1-800-833-9200*

Address: Tektronix, Inc., Department or name (if known), 14200 SW Karl Braun Drive, P.O. Box 500, Beaverton, OR 97077, USA

Web site: www.tektronix.com

Sales support: 1-800-833-9200, select option 1*

Service support: 1-800-833-9200, select option 2*

Technical support: Email: techsupport@tektronix.com, 1-800-833-9200, select option 3* (6:00 a.m. - 5:00 p.m. Pacific time)

* This phone number is toll free in North America. After office hours, please leave a voice mail message. Outside North America, contact a Tektronix sales office or distributor; see the Tektronix Web site for a list of offices.

General Safety Summary

Injury Precautions

• Avoid Electric Overload: To avoid injury or fire hazard, do not apply potential to any input, including the common inputs, that varies from ground by more than the maximum rating for that input.
• Avoid RF Burns While Handling Probe: To avoid RF burns, do not handle the probe while the common lead is connected to circuits above the voltage and frequency limits specified in Figure 11b on page 18.
• Avoid Electric Shock: To avoid injury or loss of life, do not connect or disconnect probes or test leads while they are connected to a voltage source.
• Do Not Operate Without Covers: To avoid electric shock or fire hazard, do not operate this product with covers or panels removed.
• Do Not Operate in an Explosive Atmosphere: To avoid injury or fire hazard, do not operate this product in an explosive atmosphere.
• Keep Probe Surface Clean and Dry: To avoid electric shock and erroneous readings, keep probe surface clean and dry.

Product Damage Precautions

• Do Not Operate With Suspected Failures: If you suspect there is damage to this product, have it inspected by qualified service personnel.
• Do Not Immerse in Liquids: Clean the probe using only a damp cloth. Refer to cleaning instructions on page 15.

Safety Terms and Symbols

Terms 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 could result in damage to this product or other property.

Terms 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.

Symbols on the Product

DANGER High Voltage [High Voltage Symbol] Protective Ground (Earth) Terminal [Ground Symbol] ATTENTION Refer to Manual [Attention Symbol] Double Insulated [Double Insulated Symbol]

Certifications and Compliances

Compliances

Consult the product specifications for Overvoltage Category and Safety Class.

Overvoltage Category

Overvoltage categories are defined as follows:

• CAT III: Distribution level mains, fixed installation
• CAT II: Local level mains, appliances, portable equipment
• CAT I: Signal level, special equipment or parts of equipment, telecommunication, electronics

Features and Accessories

The P5102 is a high-voltage passive probe designed for use with TekScope THS700 series instruments. The probe features a floating common and is ideal for measuring and troubleshooting power supplies and high-voltage devices. The probe provides 10X attenuation of signals up to 1000 VRMS and derated performance up to 100 MHz. The P5102 probe is certified to international safety standards.

The P5102 probe has features and accessories to make high-voltage measurements safer and easier. Please take a moment to familiarize yourself with these features and accessories and their uses.

WARNING: Do not substitute accessories from other products for those provided with the P5102. The accessories for the P5102 have been safety tested. The use of non-tested accessories may cause injury.

P5102 Features and Standard Accessories

Probe Body

The P5102 probe body is designed for personal safety, ergonomic comfort, and signal fidelity.

The finger guard provides protection when the hook tips are not being used. Keep your fingers behind the finger guard whenever possible to reduce the risk of a shock from the circuit under test.

The probe tip is a 6-32 threaded post that accepts both standard and optional accessories.

Keep the probe body and accessories clean to reduce the risk of shock due to surface conduction.

[Diagram Description: Illustration shows the probe body with a finger guard and a 6-32 probe tip. Also shows a separate probe common lead.]

Compensation Box

The compensation box contains low- and high-frequency compensation adjustments. The high-frequency adjustments are accessible by removing the compensation box cover. Refer to Adjustment Procedures on page 7.

[Diagram Description: Illustration shows the compensation box with a connector and a removable cover.]

Adjustment Tool

Use the supplied adjustment tool for probe compensation adjustments. Do not use metallic or conductive tools while making adjustments.

[Diagram Description: Illustration shows a small tool, likely a screwdriver, for making adjustments.]

Color Markers

The matching markers help you identify probe inputs at a glance. Clip one marker near the probe head and the matching marker near the compensation box as shown.

[Diagram Description: Illustration shows colored clips (markers) being attached to the probe head and the compensation box lead.]

Small Hook Tip

Use the small hook tip for making connections to small conductors such as component leads.

Install the small hook tip by sliding it over the body of the probe and screwing it onto the threaded probe tip.

To use the tip, hold the probe body and pull the tip shield back. Hook the tip onto the circuit and release the shield. The hook tip will firmly hold the conductor under test.

[Diagram Description: Illustration shows the small hook tip being attached to the probe and then being used to connect to a component lead.]

Large Hook Tip

Use the large hook tip when working with larger components such as bolt terminals and buss bars typically found in power distribution equipment.

Install the large hook tip by sliding it over the body of the probe and screwing it onto the threaded probe tip.

To use the tip, hold the probe body and pull the tip shield back. Hook the tip onto the circuit and release the shield. The hook tip will firmly hold the conductor under test.

[Diagram Description: Illustration shows the large hook tip being attached to the probe and then being used to connect to a larger component like a terminal or buss bar.]

Common Leads

The P5102 probe comes with a long and a short floating common lead. Both common leads connect to a removable crocodile clip.

Attach the common lead to the probe body by inserting the probe head into the common lead as shown.

The length of the common lead directly impacts the fidelity of high-frequency signals. The longer the common lead, the more the signal will be distorted. For more information about the common lead and signal quality, go to page 5.

[Diagram Description: Illustration shows the probe with common leads of different lengths, each with a removable crocodile clip.]

Crocodile Clip

The large crocodile clip attaches to the insulated banana connector on the common leads.

WARNING: For safe electrical connections, use the crocodile clip provided. Do not attempt to substitute the crocodile clip with any other accessory.

[Diagram Description: Close-up illustration of the crocodile clip connector.]

P5102 Optional Accessories

Probe Tip Extender (P6000)

Use the probe tip extender to connect the probe to larger test sockets located in equipment or on printed circuit boards.

Connect the probe tip extender by screwing it onto the threaded probe tip.

[Diagram Description: Illustration shows the probe tip with the extender attached.]

Probe-to-BNC Adapter

Use the probe-to-BNC adapter to connect the probe directly to BNC connectors. The adapter is recommended for use when verifying or adjusting the probe.

Attach the adapter by pressing it onto the 6-32 probe tip and making sure that the ground clip makes contact with the probe common.

WARNING: Do not connect the adapter to a floating or high-voltage source. The BNC adapter is only rated to 500 V (DC + peak AC) with the probe common connected to earth ground.

[Diagram Description: Illustration shows the probe tip with the BNC adapter attached, including a ground clip.]

Operating Basics

To get guaranteed performance from the P5102 probe, please read and apply the information in this section.

Observe Voltage Derating Information

WARNING: To avoid personal injury, do not handle the probe when the common lead is connected to a source that is above the voltage and frequency limits specified in Figure 11b on page 18. To avoid personal injury or damage to the probe, do not connect the probe input to a source that is above the maximum non-destructive input voltage and frequency limits given in Figure 11a on page 18.

Common Lead Length

Always use as short a common lead as possible between the probe head and circuit common for high frequency or fast rise time signals. The input capacitance of the probe and the series inductance added by the probe tip and common lead can result in a resonant circuit; this circuit may cause parasitic "ringing" visible within the bandwidth of your oscilloscope. Refer to Figure 1.

[Diagram Description: Figure 1 shows two waveforms illustrating waveform distortion from common lead length. One waveform, labeled "6-inch Common", shows less distortion. The other waveform, labeled "18-inch Common", shows more significant ringing and overshoot.]

Probe Loading

When you touch your probe tip to a circuit element, you are introducing a new resistance, capacitance, and inductance into the circuit. Refer to Figure 2.

[Diagram Description: Figure 2 is an equivalent circuit diagram for probe loading. It shows a voltage source (Vsource) connected in series with a source resistance (Rsource) and a parallel combination of probe input resistance (Probe Rin = 5 MΩ) and probe input capacitance (Probe Cin = 11.2 pF). A common lead inductance (Lcd) is also shown.]

Frequency and impedance of the source determine how much the probe loads the circuit you are measuring. As the frequency of the source starts to increase beyond 1 kHz, the input impedance of the probe begins to decrease. The lower the impedance of the probe relative to that of the source, the more the probe loads the circuit under test. Refer to Figure 12 on page 19 for a graph of frequency versus input impedance.

The probe has virtually no loading effect on sources with relatively low impedance and low frequency.

Adjustment Procedures

The low-frequency (LF) compensation of the P5102 probe must be checked every time the probe is connected to a different oscilloscope input. The high-frequency (HF) compensation should be checked if the probe was repaired or fails to meet rated bandwidth specifications. Check the probe using the performance verification procedures on page 13 to determine if adjustment is required.

LF Compensation

Before taking any measurements with the probe, first check the LF compensation of the probe and adjust it to match the channel input it is connected to.

1. Connect the probe to the Probe Comp signal on your TekScope instrument and then press AUTORANGE. See Figure 3.

[Diagram Description: Figure 3 shows the LF Compensation Setup. A TekScope oscilloscope (Ch 1) is depicted with the probe tip connected to a "PROBE COMP" terminal and the probe reference lead connected to the oscilloscope's reference. The "AUTORANGE" button is highlighted.]

2. Compensate the probe by adjusting the trimmer in the probe compensation box so that the corners of the signal are square. See Figure 4.

[Diagram Description: Figure 4 illustrates LF Compensation Adjustment. It shows a square wave signal. Arrows point to an adjustment trimmer labeled "LF" on the compensation box. The goal is to make the corners of the square wave sharp and square, with a frequency of approximately 1 kHz.]

HF Compensation

To compensate the probe for high frequencies, you will need a properly terminated signal source that has the characteristics given in Figure 5. Refer to Table 1 on page 13 for a complete list of required test equipment.

[Diagram Description: Figure 5 shows Signal Source Characteristics for HF Compensation. It depicts a square wave signal with 1 Vpp amplitude and a rise time (tr) less than 1 ns, and a 1 MHz square wave.]

To access the HF adjustments of the probe, you must open the cover of the compensation box using the procedure that follows.

Opening the Compensation Box

NOTE: This procedure should be performed by qualified service personnel only.

To open the cover, obtain two small screwdrivers and use them to unlatch the tab as shown in Figure 6.

WARNING: Avoid damaging the tab. A damaged tab will allow the cover to easily separate and expose the user to the electrical potential of the common connection. To avoid damaging the tab, do not attempt to press on the tab through the hole in the cover where it latches. In the event of a damaged tab, replace the probe.

1. Insert the flat blade of small screwdriver (A) into the location shown in Figure 6. Insert the blade until it stops against the back of the tab.

[Diagram Description: Figure 6 illustrates Opening the Compensation Box. It shows a probe compensation box. A screwdriver (labeled A) is shown being inserted into a slot to engage a tab (labeled 'Tab'). Another point (labeled B) is indicated for a second screwdriver.]

2. While holding screwdriver (A) in place, insert small screwdriver (B) between the ridge on the front of the compensation box and the edge of the cover.

3. Gently twist the blade of screwdriver (B) to separate the cover and unlatch the tab.

4. After unlatching the tab, slide the cover back to expose the internal adjustments.

HF Compensation Procedure

After opening the compensation box, perform the following procedure to compensate the probe for high frequencies.

1. Connect a 50 Ω feedthrough termination to the positive going FAST RISE output of the calibration generator. See Figure 7.

[Diagram Description: Figure 7 shows the HF Compensation Setup. A Calibration Generator is connected via a FAST RISE Output to a 50 Ω Termination. The termination is connected to a Probe-to-BNC Adapter, which is then connected to the P5102 Probe. The probe is connected to a Test Oscilloscope.]

2. Refer to page 4 and use the optional probe-to-BNC adapter to connect the probe to the termination.

3. Set the Calibration Generator to 1 MHz.

4. Set the PULSE AMPLITUDE to 0.5 Vp-p.

NOTE: If you have changed the default setting for the probe type, access the vertical menu of the TekScope instrument and return the setting to 10X.

5. Set the oscilloscope to 100 mV/division.

6. Set the oscilloscope averaging to 4.

7. Set the oscilloscope to 10 ns/div (100 ns, X10 magnification). Adjust the oscilloscope as necessary to view the leading edge of the waveform.

8. Locate the HF1 and HF2 adjustments. See Figure 8.

[Diagram Description: Figure 8 shows HF Compensation Adjustments on the compensation box, with two trimmer adjustment points labeled "HF1" and "HF2".]

9. Preset HF1 counterclockwise and HF2 clockwise.

10. Adjust HF2 for flatness and adjust HF1 for the best front corner. See Figure 9. Because HF1 and HF2 interact, readjust HF2 and HF1 as necessary to achieve the best rise time with the smallest aberrations.

[Diagram Description: Figure 9 illustrates HF Compensation Regions of Fast Rise Signal. It shows a rising edge of a signal with labels indicating HF1 (10 ns) for the rise time and HF2 (20 ns) for flatness, with a target of less than 6% aberrations.]

11. After compensating the HF, carefully slide the cover back until the tab latches securely into place.

Performance Verification

Use the procedure in this section to verify that the P5102 probe meets the warranted bandwidth specification highlighted with boldface type in the Specifications section on page 17. The steps of this procedure must be performed in the order given using a THS720 TekScope instrument and other equipment that meets the minimum requirements listed in Table 1.

Table 1: Required Test Equipment

NOTE: Compensate the probe for LF before performing this procedure. The LF compensation procedure begins on page 7.

If the probe does not meet the bandwidth requirement of this procedure, perform the adjustments beginning on page 7 and retest.

Bandwidth Test Setup

1. Connect the test setup as shown in Figure 10.

[Diagram Description: Figure 10 shows the Bandwidth Test Setup. A Leveled Sine Wave Generator output is connected through a 50 Ω Termination and a Probe Tip to BNC Adapter to the P5102 Probe, which is then connected to a Test Oscilloscope.]

2. Set the leveled signal generator output frequency to 1 MHz.

NOTE: If you have changed the default setting for the probe type, access the vertical menu of the TekScope instrument and return the setting to 10X.

3. Set the oscilloscope to 50 mV/division. (The effective setting with the 10X attenuation of the probe is 500 mV/division.)

4. Adjust the Leveled Signal Generator for a display exactly 6 divisions peak-to-peak.

5. Increase the Leveled Signal Generator frequency until the display is 4.2 divisions peak-to-peak. (This represents the .707 or half-power amplitude.)

6. Note that the frequency is greater than 100 MHz.

Maintenance

This section contains information necessary for the maintenance and repair of the P5102 probe.

NOTE: The P5102 probe has no replaceable components. Accessory parts may be ordered as indicated in the replaceable parts list.

Cleaning Instructions

Clean the probe using a soft cloth dampened with a mild detergent and water solution. Do not use any other chemicals or abrasives.

Customer Support

Refer to Contacting Tektronix at the front of this manual for a listing of the various ways to contact Tektronix, Inc. for operational and service support of this product.

Preparation for Shipment

If you need to ship your probe, pack it carefully to prevent damage while in transit. If the original packaging is unfit for use or not available, use the following packaging guidelines:

1. Use a corrugated cardboard shipping carton having inside dimensions at least one inch greater than the probe dimensions. The box should have a carton test strength of at least 200 pounds.
2. Put the probe into a plastic bag or wrap to protect it from dampness in transit.
3. Place the probe into the box and stabilize it with light packing material.
4. Seal the carton with shipping tape.

Specifications

The warranted specifications of Table 2 that appear in boldface type are specifications checked in the Performance Verification section. Specifications that are not warranted are typical (Tables 3 and 4) and are provided as general information for your convenience.

The specifications apply to a P5102 probe installed on a Tektronix THS720 oscilloscope. The instrument must have a warm-up period of at least 10 minutes and be in an environment that does not exceed the limits described in Table 5.

Table 2: Warranted Electrical Specifications

Figure 11: Maximum Voltage Derating Curves (VRMS, DC Coupled)

[Diagram Description: Figure 11 consists of two graphs. Graph (a) titled "Maximum non-destructive input voltage (probe tip to common or earth ground)" plots Voltage (VRMS) against Frequency (Hz). It shows separate curves for Category I & II and Category III, indicating maximum allowable voltages at different frequencies. Graph (b) titled "Maximum safe-handling limits (probe common to earth ground)" also plots Voltage (VRMS) against Frequency (Hz). It shows maximum voltage limits for Category I & II and Category III, and a shaded "RF burn risk area".]

Table 3: Typical Electrical Characteristics

Figure 12: Typical Input Impedance

[Diagram Description: Figure 12 plots Typical Input Impedance (MΩ) against Frequency (Hz) on a logarithmic scale. The impedance starts high at low frequencies and decreases as frequency increases.]

Figure 13: Typical Input Phase

[Diagram Description: Figure 13 plots Typical Input Phase (degrees) against Frequency (Hz) on a logarithmic scale. The phase shift starts near 0 degrees at low frequencies and becomes more negative, reaching a minimum around -70 degrees at higher frequencies.]

Table 4: Typical Mechanical Characteristics

Table 5: Environmental Specifications

Replaceable Parts

[Diagram Description: Figure 14 shows an illustration of the P5102 probe and its accessories, with numbered callouts pointing to various parts. Standard accessories include items like cable markers, a crocodile clip, and an adjustment tool. Optional accessories include a probe tip extender and a BNC adapter.]

Standard Accessories

• CLIP, CABLE MKR: RED, PLASTIC
• CLIP, CABLE MKR: YELLOW, PLASTIC
• CLIP, CABLE MKR: GREEN, PLASTIC
• CLIP, ELEC: CROCODILE, 82MM L, 4MM
• SCREWDRIVER: ADJUSTMENT TOOL
• HOOKTIP, SET: HOOKTIP ASSY, LARGE AND SMALL
• LEAD SET ASSY: COMMON, P5102, 1) 18.0 L 1) 6.0 L

Optional Accessories

• TIP, PROBE: P6000
• ADAPTER, PROBE: PROBE TO BNC
• SCREWDRIVER: ADJUSTMENT TOOL, PKG OF 5

Replaceable Parts List

Manufacturer Index