Tektronix 070-9472-02 User manual

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Instruction Manual
P5205
High Voltage Differential Probe
070-9472-02
www.tektronix.com
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Copyright ©Tektronix, Inc. All rights reserved.
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.
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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
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; 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.
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P5205 Instruction 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 Safely 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.......................
Replacing TEKPROBE Interface Pins 21................
Removing and Replacing the TEKPROBE Interface
Collar 23.......................................
Removing the Compensation Box Covers 24..............
Packaging For Return Shipment 25........................
Performance Verification 27............................
Construction of Modified BNC Adapter 28..................
Setup 29.............................................
Differential Gain Accuracy 30............................
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Table of Contents
ii P5205 Instruction 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 Index 36...............
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Table of Contents
P5205 Instruction Manual iii
List of Figures
Figure 1: P5205 High-Voltage 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 with and without extension
leads 14..........................................
Figure 5: Typical common-mode rejection ratio
(50X attenuation) 18.................................
Figure 6: Input impedance 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...................
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Table of Contents
iv P5205 Instruction Manual
List of Tables
Table 1: Functional Check 8............................
Table 2: Warranted Electrical Characteristics 15.............
Table 3: Certifications and Compliances 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.................
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P5205 Instruction 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 VRMS CAT II from ground on
either input or ±1,300 V (DC + peak AC) between the leads.
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. Connect the probe output to the
measurement instrument before connecting the probe to the circuit
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 terminals 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 making connections to the product.
Use Proper AC Adapter. Use only the AC adapter specified for this
product.
Do Not Operate Without Covers. Do not operate this product with
covers or panels removed.
Avoid Exposed Circuitry. Do not touch exposed connections and
components when power is present.
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General Safety Summary
vi P5205 Instruction Manual
Do Not Operate With Suspected Failures. If you suspect there is damage
to this product, have it inspected 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 conditions 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
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P5205 Instruction Manual vii
Service Safety Summary
Only qualified personnel should perform service procedures. Read
this Service 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 product unless another person capable of rendering first aid
and resuscitation is present.
Use Care When Servicing with Power On. Dangerous voltages or currents
may exist in this product. Disconnect power, remove battery (if
applicable), and disconnect test leads before removing protective
panels, soldering, or replacing components.
To avoid electric shock, do not touch exposed connections.
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Service Safety Summary
viii P5205 Instruction Manual
Contacting Tektronix
Phone [phone]*
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: [e-mail]
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.
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P5205 Instruction 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
measurement 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 shielded, and isolated. The internal shield
connects to earth ground through the output lead. The case of the
probe and control buttons are isolated and double insulated. This
protection extends up to the full input rating of the probe.
The accessories supplied with the probe meet the same safety
standards as the probe. You may use other accessories 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 excellent rejection of common-
mode signals. Both inputs have high impedance and low capacitance.
Because of these features, the probe can safely measure the fast
voltage transients in switching power devices without damaging
them.
Other applications for the P5205 probe include testing high-voltage
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.
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Getting Started
2P5205 Instruction Manual
ON
Figure 1: High Voltage Differential Probe
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Getting Started
P5205 Instruction 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 VRMS 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
measurements, 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 Range. 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 alarm 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 the bandwidth is restricted to
approximately 5 MHz.
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Getting Started
4P5205 Instruction 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 potential
between widely separated points, connect the extension
leads to the input leads with the supplied adapters. 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.
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Getting Started
P5205 Instruction Manual 5
Zero Adjust. The zero adjust allows you to set the probe
output to the zero reference point prior to making
measurements. Use the adjustment tool provided.
Soft Case. The soft case 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 matching band near the compensa-
tion box.
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Getting Started
6P5205 Instruction 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 range setting. For higher resolution and less
noise when measuring signals below 130 V, switch the attenua-
tion to 50X. If the overrange indicator lights or flashes, the output
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 least 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 read page 9 of the Operating Basics section
for important safety information.
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Getting Started
P5205 Instruction 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 measurement 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 completes the functional check procedure.
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