Tektronix Thermometer 070-9472-02 User manual

Instruction Manual

P5205

High Voltage Differential Probe

070-9472-02

www.tektronix.com

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.

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

TEKTRONIX, TEK, and TEKPROBE are registered trademarks of Tektronix,

Inc.

TekProbe is a registered trademark of Tektronix, Inc.

WARRANTY

Tektronix warrants that the products that it manufactures and sells 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

char ge 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; c) to repair any

damage or malfunction caused by the use of non-Tektronix supplies; 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 THE

LISTED PRODUCTS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS 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.

P5205 Instructi on Manual

i

Table of Contents

General Safety Summary v............................

Service Safety Summary vii.............................

Contacting Tektronix viii...............................

Getting Started 1.....................................

Features and Accessories 1..............................

Installation 6.........................................

Functional Check 7....................................

Operating Basics 9...................................

Operating the Probe Safe ly 9............................

Minimizing Risk of RF Burn (probe leads) 10.............

Maximum Input Limits 10............................

Operating Characteristics and Probing Techniques 11.........

Operating Limits 11.................................

Overrange Detection 12..............................

Common-Mode Rejection 12..........................

Twisting the Input Leads 12...........................

Extension Leads 13..................................

Probe Loading 14...................................

Specifications 15......................................

Warranted Characteristics 15.............................

Typical Characteristics 17...............................

Nominal Characteristics 19..............................

Maintenance 21.......................................

Cleaning 21...........................................

Servicing the Compensation Box 21.......................

Replac ing TEKPROBE Interface Pins 21................

Removing and Replacing the TEKPROBE Interface

Collar 23.......................................

Removing the Com pensation Box Covers 24..............

Packaging For Return Shipment 25........................

Performance Verification 27............................

Construction of Modifi ed BNC Adapter 28..................

Setup 29.............................................

Differential Gain Accuracy 30............................

Table of C ontents

ii

P5205 Instructi on Manual

Bandwidth 32.........................................

DC CMRR 33.........................................

Replaceable Parts 35...................................

Parts Ordering Information 35............................

Using the Replaceable Parts List 35........................

Abbreviations 36....................................

Mfr. Code to Manufacturer Cross Inde x 36...............

Table of C ontents

P5205 Instructi on Manual

iii

List of Figures

Figure 1: P5205 High-Volt age Differential Probe 2...........

Figure 2: Safety limits (voltage between either input and

earth ground) 11....................................

Figure 3: Twisting the input leads 13.......................

Figure 4: HF transient response wi th and without extension

leads 14..........................................

Figure 5: Typical common-mode rejection ratio

(50X attenuation) 18.................................

Figure 6: Input impedanc e vs. frequency 19.................

Figure 7: Replacing TEKPROBE interface pins 22............

Figure 8: Replacing the TEKPROBE collar 23...............

Figure 9: Removing the compensation box covers 24..........

Figure 10: Replacing the compensation box cover 25..........

Figure 11: BNC-male-to-dual binding post adapter 28.........

Figure 12: Removing plastic covers from binding posts 29.....

Figure 13: Slide probe leads onto the binding posts 31.........

Figure 14: P5205 Probe and replaceable accessories 37........

Figure 15: Replaceable parts -- compensation box 39..........

Figure 16: P5205 optional accessories 40...................

Table of C ontents

iv

P5205 Instructi on Manual

List of Tables

Table 1: Functional Che ck 8............................

Table 2: Warranted Electrical Characteristics 15.............

Table 3: Certifications and Compl iances 16.................

Table 4: Typical Electrical Characteristics 17................

Table 5: Typical Mechanical Characteristics 18..............

Table 6: Nominal Electrical Characteristics 19..............

Table 7: List of Equipment Required 27....................

Table 8: Parts List Column Descriptions 34.................

P5205 Instructi on Manual

v

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.

Observe Maximum Working Voltage

Do not use the P5205 above 1,000 V

RMS

CAT II from ground on

either input or

± 1,300 V (DC + peak AC) between the lea ds.

To Avoid Fire or Personal Injury

Avoid RF Burns While Handling Probe. To avoid RF burns, do not handle

the probe while the input leads are connected to circuits above the

voltage and frequency limits specified in Figure 2 on page 11. Use

only probe accessories that are rated for the application.

Connect and Disconnect Properly. Connec t the probe output to t he

measurement instrument before connecting the probe to the circ uit

under test. Disconnect the probe input and the probe ground from the

circuit under test before disconnecting the probe from the measure-

ment instrument.

Ground the Product. This product is indirectly grounded through the

grounding conductor of the mainframe power cord. To avoid electric

shock, the grounding conductor must be connected to earth ground.

Before making connections to the input or output t erminals of the

product, ensure that the product is properly grounded.

Observe All Terminal Ratings. To avoid fire or shock hazard, observe all

ratings and markings on the product. Consult the product manual for

further ratings information before ma king connections to the product.

Use Proper AC Adapter. Use onl y the AC adapter specifie d for this

product.

Do Not Operate Without Covers. Do not operate t his product with

covers or panels removed.

Avoid Exposed Circuitry. Do not touch exposed connections and

components when power is present.

General Safety Summary

vi

P5205 Instructi on Manual

Do Not Operate With Suspected Failures. If you suspect there is damage

to this product, ha ve it i nspected by qualified service personnel.

Do Not Operate in Wet/Damp Conditions.

Do Not Operate in an Explosive Atmosphere.

Keep Product Surfaces Clean and Dry.

Safety Terms and Symbols

Terms in This Manual. 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 condi tions or practices that

could result in damage to this product or other property.

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 the marking.

CAUTION indicates a hazard to property including the product.

Symbols on the Product. These symbols may appear on the product:

CAUTION

Refer to Manual

WARNING

High Voltage

Double

Insulated

Protective Ground

(Earth) Terminal

P5205 Instructi on Manual

vii

Service Safety Su mmary

Only qualified personnel should perform service procedures. Read

this Se rvice Safety Summary and the General Safety Summary before

performing any service procedures.

Do Not Service Alone. Do not perform internal service or adjustments

of this produc t unl ess another person capable of rendering first aid

and resuscitation is present.

Use Care When Servicing with Power On. Dangerous vol tages or current s

may exist in this product. Disconnec t power, remove battery (if

applicable), and disconnect test leads before removing protective

panels, soldering, or replacing component s.

To avoid electric shock, do not touch exposed connections.

Service Safety Summary

viii

P5205 Instructi on Manual

Contacting Tektronix

Phone 1-800-833-9200*

Address Tektronix, Inc.

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*

1-503-627-2400

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.

P5205 Instructi on Manual

1

Getting Started

This section describes the High Voltage Differential Probe and gives

instructions on how to install and functionally test the probe.

Features and Accessories

The P5205 probe shown in Figure 1 provides a safe means of

measuring circuits with floating high voltages. The probe outputs a

low-voltage, ground-referenced signal for display on instruments

with the TEKPROBE interface (or any oscilloscope or other

measurem ent instrument when used with the Tektronix 1103

TEKPROBE power supply).

To protect you from RF and high voltage, the case of the probe is

nonconductive, internally shielde d, and isola ted. The internal shield

connect s t o earth ground through the output l ead. The case of the

probe and control buttons are isolated and double insulated. Thi s

protection extends up to the full input rating of the probe.

The accessories supplied with the probe meet the same safety

standards as t he probe. You may use other acc essories if they are

approved for the maximum voltage present in your application and

have the same style and size connectors.

The P5205 probe allows clear and accurate measurements of

high-speed transitions and provides excel lent rejection of common-

mode signals. B oth inputs have high impedance and low capaci tance.

Because of these features, the probe can safely measure the fast

voltage tra nsients in switching power devices without damaging

them.

Other applications for the P5205 probe include testing high-volt age

motor control circuits and line-connected circuits in switch-mode

power supplies.

For a complete list of replaceable accessories and part ordering

information, see the Replaceable Parts section, starting on page 35.

Getting Started

2

P5205 Instructi on Manual

ON

Figure 1: High Voltage Differential Probe

Getting Started

P5205 Instructi on Manual

3

The P5205 has several features and accessories that make probing

and measurement a simpler task. Take a moment to familiarize

yourself with these items and their uses.

Differential Inputs. The inputs are rated to safely accept

a maximum of 1,000 V

RMS

CAT II between either

input and earth ground and a maximum difference of

1,300 V (DC + peak AC) between the inputs.

NOTE. The input safety ratings are valid for both

attenuation range settings. However, for useful

measurem ents, the input should be kept to the

operating limits of the selected attenuation range of

130 V up to 1,300 V (DC + peak AC).

Attenuation R ange. In the raised position the range

button sets the attenuation to 500X. In the lowered

position the range button sets the attenuation to 50X.

Use the 500X position for measurements up to a

maximum of 1,300 V (DC + peak AC) differential. Use

the 50X position for better signal resolution on

connections below 130 V (DC + peak AC).

Overrange Indicator. The overrange indicator lights red

if the voltage of the input signal exceeds the linear

operating range of the probe. When this happens, the

signal on the probe output does not accurately represent

the signal on the probe input.

Audible Overrange. In the raised position the overrange

button sets the audible al arm to sound whenever the

overrange indicator lights.

Bandwidth Select. In the raised position the bandwidth

button sets the full bandwidth (100 MHz minimum). In

the lowered position t he bandwidth is restricted to

approximately 5 MHz.

Getting Started

4

P5205 Instructi on Manual

Input Leads. The input leads of the differential probe

connect to the crocodile clips and plunger clamps that

come with the probe. The connectors are 4 mm

insulated banana plugs and are double insulated for

safety.

NOTE. Use only accessories that are rated to the

maximum input voltage of the P5205 probe.

Extension Leads and Adapters. To measure the potenti al

between widely separated points, connect the ext ension

leads to the input leads with the supplied a dapters. Use

both extension leads to minimize distortion caused by

mismatched lead length.

NOTE. Above 10 MHz, the extension leads degrade the

high frequency performance of the P5205 probe. See

Figure 4 on page 14.

Plunger Clamps. The plunger clamps have long sleeves

with retracting hooks. These clamps connect safely to

recessed test points that are otherwise difficult to reach.

The connectors are double insulated for safety.

Crocodile Clips. The large insulated clips connect easily

to large bolts or bus bars. The connectors are double

insulated for safety.

TEKPROBE Interface. The TEKPROBE interface

provides power, signal, and probe characteristic data

transfer.

If your oscilloscope does not support the TEKPROBE

interface, you can use the optional 1103 probe power

supply as an effective interface. Contact your local

Tektronix representative for more information.

Getting Started

P5205 Instructi on Manual

5

Zero Adjust. T he zero adjust allows you t o set t he probe

output to the zero reference point prior to making

measurements. Use the adjustment tool provided.

Soft Case. T h e soft c ase protects the probe and allows

you to hang the probe near the point of measurement.

Install or remove the case by opening the access doors

on the back.

When not in use, coil the leads and secure them with

the strap on the back. Use one of the loops to hang the

probe on a storage hook or utility belt.

Color Marker Bands. When you are using more than one

probe, the bands enable you to quickly distinguish

between probes and the channels they are connected to.

To use the marker bands, attach one band near the

probe head and the matchi ng band near the compensa-

tion box.

Getting Started

6

P5205 Instructi on Manual

Installation

Install the P5205 probe as follows:

1. Connect the output of the probe to the TEKPROBE input of the

oscilloscope or other measurement instrument. The measurement

instrument input must have a ground reference.

NOTE. Use the 1103 TEKPROBE Power supply if the instrument does

not have the TEKPROBE interface.

2. Select the proper ra nge setting. For higher resolution and less

noise when measuring signals below 130 V, switch the attenua-

tion to 50X. If the ove rrange indicator lights or flashes, the out put

signal may not be accurate. Use the 500X setting instead.

3. The probe output is adjusted to zero at the factory. Adjust the

probe output to zero only if you need to measure small differen-

tial voltages. Follow steps a and b to make the adjustment.

a. Let the probe warm up for at l east 20 minutes.

b. Connect the input leads of the probe together. Insert the

adjustment tool in the access hole of the compensation

box and adjust the probe to the zero reference point.

If you are using this probe for the first time, read the General Safety

Summary on page v, and re ad page 9 of the Operating Basics section

for important safety information.

Getting Started

P5205 Instructi on Manual

7

Functional Check

To make a simple functional check of the P5205 probe, select a

source that supplies AC line voltage and use the following

procedure. This procedure verifies a majority of the circuitry within

the probe. For a complete performance verification, refer to the

Performance Verification section starting on page 27.

1. Use the installation procedure starting on page 6 to connect the

output of the P5205 probe to a measurem ent instrument.

2. Connect the inputs, set the range, and perform the check as each

line of Table 1, below, indicates.

Table 1: Functional check

Input 1

(+ or --)

Input 2

(-- or +) Mode

Range

setting Check

Hot Ground or

Neutral

Differential 500X

(out)

Measurement instrument

displays or indicates the line

voltage

50X

(in)

Overrange indicator lights if

the input is 150 Vp

Hot (same

connection)

Common

Mode

50X or 500X No signal

This c ompletes the functional check procedure.

Getting Started

8

P5205 Instructi on Manual

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