Instruction Manual
P5205
High Voltage Differential Probe
070-9472-02
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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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Table of Contents
General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . .
v
Service Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contacting Tektronix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
vii
viii
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
1
6
7
Operating Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating the Probe Safely . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimizing Risk of RF Burn (probe leads) . . . . . . . . . . . . .
Maximum Input Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Characteristics and Probing Techniques . . . . . . . . .
Operating Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overrange Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Common-Mode Rejection . . . . . . . . . . . . . . . . . . . . . . . . . .
Twisting the Input Leads . . . . . . . . . . . . . . . . . . . . . . . . . . .
Extension Leads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Probe Loading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9
9
10
10
11
11
12
12
12
13
14
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranted Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nominal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15
15
17
19
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing the Compensation Box . . . . . . . . . . . . . . . . . . . . . . .
Replacing TEKPROBE Interface Pins . . . . . . . . . . . . . . . .
Removing and Replacing the TEKPROBE Interface
21
21
21
21
Collar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removing the Compensation Box Covers . . . . . . . . . . . . . .
Packaging For Return Shipment . . . . . . . . . . . . . . . . . . . . . . . .
23
24
25
Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Construction of Modified BNC Adapter . . . . . . . . . . . . . . . . . .
Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential Gain Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27
28
29
30
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Table of Contents
Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC CMRR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32
33
Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Replaceable Parts List . . . . . . . . . . . . . . . . . . . . . . . .
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mfr. Code to Manufacturer Cross Index . . . . . . . . . . . . . . .
35
35
35
36
36
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Table of Contents
List of Figures
Figure 1: P5205 High-Voltage Differential Probe . . . . . . . . . . .
Figure 2: Safety limits (voltage between either input and
2
earth ground) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3: Twisting the input leads . . . . . . . . . . . . . . . . . . . . . . .
Figure 4: HF transient response with and without extension
leads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5: Typical common-mode rejection ratio
11
13
14
(50X attenuation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6: Input impedance vs. frequency . . . . . . . . . . . . . . . . .
Figure 7: Replacing TEKPROBE interface pins . . . . . . . . . . . .
Figure 8: Replacing the TEKPROBE collar . . . . . . . . . . . . . . .
Figure 9: Removing the compensation box covers . . . . . . . . . .
Figure 10: Replacing the compensation box cover . . . . . . . . . .
Figure 11: BNC-male-to-dual binding post adapter . . . . . . . . .
Figure 12: Removing plastic covers from binding posts . . . . .
Figure 13: Slide probe leads onto the binding posts . . . . . . . . .
Figure 14: P5205 Probe and replaceable accessories . . . . . . . .
Figure 15: Replaceable parts - compensation box . . . . . . . . . .
Figure 16: P5205 optional accessories . . . . . . . . . . . . . . . . . . .
18
19
22
23
24
25
28
29
31
37
39
40
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iii
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Table of Contents
List of Tables
Table 1: Functional Check . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
15
16
17
18
19
27
34
Table 2: Warranted Electrical Characteristics . . . . . . . . . . . . .
Table 3: Certifications and Compliances . . . . . . . . . . . . . . . . .
Table 4: Typical Electrical Characteristics . . . . . . . . . . . . . . . .
Table 5: Typical Mechanical Characteristics . . . . . . . . . . . . . .
Table 6: Nominal Electrical Characteristics . . . . . . . . . . . . . .
Table 7: List of Equipment Required . . . . . . . . . . . . . . . . . . . .
Table 8: Parts List Column Descriptions . . . . . . . . . . . . . . . . .
P5205 Instruction Manual
iv
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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.
P5205 Instruction Manual
v
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General Safety Summary
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:
Double
Insulated
Protective Ground
(Earth) Terminal
CAUTION
Refer to Manual
WARNING
High Voltage
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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.
P5205 Instruction Manual
vii
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Service Safety Summary
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
Sales support
Service support
Technical support
1-800-833-9200, select option 1*
1-800-833-9200, select option 2*
Email: [email protected]
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 Instruction Manual
viii
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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
ON
Figure 1: High Voltage Differential Probe
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Getting Started
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
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
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
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
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 +)
Range
setting
Mode
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 Common
connection) Mode
50X or 500X No signal
This completes the functional check procedure.
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Getting Started
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Operating Basics
To help you use the High Voltage Differential Probe safely and
effectively, this section provides important information about safety
limits, operating characteristics, and probing techniques.
WARNING. Due to the inherent hazards associated with taking
high-voltage measurements, the product is intended for use by
qualified personnel who have had the training to make these types of
measurements. Read and follow the precautions specified in this
manual.
Before you make any oscilloscope measurement, observe all safety
precautions described in the user and service manuals for the
equipment you are working on. Some general rules about using and
servicing electrical equipment are worth repeating here.
H Observe the safety instruction symbols for the equipment you are
working on.
H Consult the instruction or service manuals for the equipment you
are working on.
H Don’t operate or service an electrical device in an explosive
atmosphere.
H Avoid personal injury by never touching exposed connections or
components in the circuit-under-test when the power is on.
Operating the Probe Safely
Before connecting the inputs of the probe to a circuit, read the safety
information in this section, and attach the appropriate accessories to
the input connectors of the probe.
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Operating Basics
Minimizing Risk of RF Burn (probe leads)
WARNING. To avoid personal injury, do not handle the probe leads
when the leads are connected to a source that is above the voltage
and frequency limits given in Figure 2 on page 11. The area above
these limits poses a risk of radio frequency (RF) burns.
If you need to use the probe within the risk area for RF burn, power
down the source before connecting or disconnecting the probe leads.
Maximum Input Limits
CAUTION. To avoid damaging the input circuitry of the P5205 probe,
do not apply a voltage that is more than 1,000 VRMS CAT II between
either input and ground or more than 1,300 V (DC + peak AC)
between the two inputs. Above 3 MHz, the voltage limit decreases as
frequency increases. See Figure 2 on page 11. The input limit applies
to both the 50X and 500X settings.
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Operating Basics
Category II maximum
voltage limit (1,000 V)
RF burn risk area
(shaded)
Voltage derating
with frequency
1000 V
500 V
Voltage
(RMS)
100 V
50 V
DC or 0 100 k
500 k 1 M
5 M 10 M
50 M 100 M
Frequency (Hz)
Figure 2: Safety Limits (voltage between either input and earth ground)
Operating Characteristics and Probing Techniques
This section explains the operating characteristics of the High
Voltage Differential Probe along with techniques you can use to
maximize the performance of the probe.
Operating Limits
The P5205 probe has two operating ranges that you select with the
ATTENUATION button on the front panel:
H Select the 50X range for inputs of 0 V to 130 V (DC + peak AC).
H Select the 500X range for inputs of 130 V to 1300 V (DC +
peak AC).
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Operating Basics
Both ranges are rated for the maximum input limits, but you can
obtain a useful measurement only if the voltage you apply is within
the specified limits of the operating range.
Overrange Detection
Differential voltage outside the operating range will overdrive the
circuitry of the probe and distort the output signal. When this
differential overrange occurs, the probe detects the condition and
lights the overrange indicator. With the Audible Overrange ON, the
probe will also emit an audible alarm.
Common-mode voltage greater than 1,000 VRMS can distort the
output signal, but the probe will not indicate an overrange condition.
Common-Mode Rejection
The common-mode rejection ratio (CMRR) is the specified ability of
P5205 probe to reject signals that are common to both inputs. More
precisely, CMRR is the ratio of the differential gain to the common-
mode gain. The higher the ratio, the greater the ability of probe to
reject common-mode signals. For exact specifications, see pages 15
and 17.
Common mode rejection decreases as the input frequency increases.
Figure 5 on page 18 is a plot of typical CMRR of the probe versus
input frequency. For example, if you apply a 60 Hz line voltage of
500 VP-P to both input leads of the probe, the probe rejects the signal
by 80 dB (typical) and the signal appears as only a 50 mVP-P signal
on the oscilloscope screen.
To maximize the rejection of common-mode signals, twist the input
leads together as shown in Figure 3 on page 13, and do not use the
extension leads.
Twisting the Input Leads
Twisting the input leads as shown in Figure 3 helps to cancel noise
that is induced into the input leads and to improve the high-frequen-
cy response of the inputs. For the best response possible, do not use
the extension leads.
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Operating Basics
Figure 3: Twisting the input leads
Extension Leads
The extension leads allow you to reach widely spaced connection
points. Connect the extension leads to the input leads using the
adapters provided. Be sure to use both extension leads so that the
input leads are the same length.
The extension leads, however, do affect the high-frequency
performance of the probe. With longer lead length, differential noise
induced into the input leads is greater. Also, because of the added
inductance of the leads, voltage measurements at frequencies above
approximately 10 MHz may not be as precise. Figure 4 on page 14
shows the affect on HF transient response.
The extension leads do not affect the performance of the probe when
bandwidth is set to 5 MHz.
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Operating Basics
With extension leads
Without extension leads
50 ns/div
50 ns/div
Figure 4: HF Transient response with and without extension leads
Probe Loading
When you touch your probe tip to a circuit element, you are
introducing a new resistance, capacitance, and inductance into the
circuit.
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. For a graph of frequency versus input impedance, refer to
Figure 6 on page 19.
The probe has virtually no loading effect on sources with relatively
low impedance and low frequency.
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Specifications
The specifications in Tables 2 through 6 apply to a P5205 probe
installed on a Tektronix TDS 460A oscilloscope. When the probe is
used with another oscilloscope, the oscilloscope must follow these
specifications:
H An input impedance of 1 MΩ
H An input capacitance range of between 15 and 20 pF
H A bandwidth greater than 400 MHz
The probe must have a warm-up period of at least 20 minutes and be
in an environment that does not exceed the limits described in
Table 2.
Specifications for the P5205 probe fall into three categories:
warranted, typical, and nominal characteristics.
WARNING. Special fixtures are required to examine specifications at
the maximum frequency and voltage levels and should be conducted
only by qualified Service Personnel. See the Service section for more
detail.
Warranted Characteristics
Warranted characteristics in Tables 2 and 3 describe guaranteed
performance within tolerance limits or certain type-tested require-
ments. Warranted characteristics that have checks in the Perfor-
mance Verification section appear in boldface type.
Table 2: Warranted Electrical Characteristics
DC Common Mode Rejection Ratio
Bandwidth
> 3000:1 at 500 VDC, 20-30_ C, <70% RH
DC to 100 MHz (-3 dB)
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Specifications
Table 2: Warranted Electrical Characteristics (Cont.)
Maximum Operating Input Voltage
500X differential: 1.3 kV (DC + peak AC)
500X common mode: 1 kV CAT II
RMS
50X differential: 130 V (DC + peak AC)
50X common mode: 1 kV CAT II
RMS
Maximum Nondestructive Input Voltage
500X and 50X differential: 1.5 kV (DC +
peak AC)
500X and 50X common mode: 1.3 kV
RMS
CAT II
Gain Accuracy
3% at 20-30_ C, <70% RH
Temperature
Operating: 0 to 40_ C
Nonoperating: -30 to +70_ C
Humidity
Operating: <85% RH at or below +35_ C
Nonoperating: <85% RH at or below
+60_ C
Table 3: Certifications and Compliances
EC Declaration of
Conformity -- Low
Voltage
Compliance was demonstrated to the following specification as
listed in the Official Journal of the European Communities:
Low Voltage Directive 73/23/EEC, as amended by 93/68/EEC:
EN 61010-1/A2:1995
Safety requirements for electrical equipment for
measurement, control, and laboratory use
EN 61010-2-031:1994
Particular requirements for hand-held probe assemblies for
electrical measurement and test equipment
Approvals
UL3111-1 - Standard for electrical measuring and test equipment
IEC 10106-2-031 - Particular requirements for hand-held probe
assemblies for electrical measurement and test
CAN/CSA-C22.2 No. 1010.1-92 and CAN/CSA-C22.2 No.
1010.2.031-94 - Safety requirements for electrical equipment for
measurement, control, and laboratory use
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Specifications
Table 3: Certifications and Compliances (Cont.)
Installation Category Terminals on this product may have different installation category
Descriptions
designations. The installation categories are:
CAT III Distribution-level mains (usually permanently
connected). Equipment at this level is typically
in a fixed industrial location
CAT II Local-level mains (wall sockets). Equipment at
this level includes appliances, portable tools,
and similar products. Equipment is usually
cord-connected
CAT I
Secondary (signal level) or battery operated
circuits of electronic equipment
Pollution Degree 2
Do not operate in environments where conductive pollutants may
be present.
Typical Characteristics
Typical characteristics in Tables 4 and 5 describe typical but not
guaranteed performance.
Table 4: Typical Electrical Characteristics
Rise Time
3.5 ns
5 MHz
Bandwidth Limit
60 Hz: > 10,000:1
100 kHz: > 300:1
100 MHz: > 300:1
AC Common-Mode Rejection Ratio
(20-30_C, <70% RH)
See Figure 5 on page 18
AC Noise
(referenced to input)
50X: < 50 mV
500X: < 300 mV
RMS
RMS
Input Impedance
8 MΩ, 3.5 pF between inputs
4 MΩ, 7 pF between each input and ground
See Figure 6
Propagation Delay
17 nS
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Specifications
Table 4: Typical Electrical Characteristics (Cont.)
Overdrive Recovery
Zero Adjust
< 50 ns to 10% of final value after 10X
overdrive (50X range only)
50X: 0.5 V
500X: 5 V
40 dB
50 dB
60 dB
70 dB
80 dB
90 dB
1 Hz
10 Hz
100 Hz
1 kHz
10 kHz
100 kHz
1 MHz
Frequency
Figure 5: Typical Common-Mode Rejection Ratio (50X Attenuation)
Table 5: Typical Mechanical Characteristics
Dimensions, Case
7.2 in × 2.6 in × 1.3 in
(185 mm × 66 mm × 32 mm)
Dimensions, Input Leads
Dimensions, Output Cable
12 in (30 cm)
6 ft (1.8 m)
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Specifications
Table 5: Typical Mechanical Characteristics (Cont.)
Unit Weight (probe only)
11 oz (315 g)
3 lb, 2 oz (1.42 kg)
Shipping Weight (with accessories)
10 M
1 M
100 k
10 k
1 k
100
1
10
100
1 k
10 k 100 k
1 M
10 M
100 M
Frequency (Hz)
Figure 6: Input Impedance vs. Frequency
Nominal Characteristics
Nominal characteristics in Table 6 on page 19 describe guaranteed
traits, but the traits do not have tolerance limits.
Table 6: Nominal Electrical Characteristics
Input Type
Balanced differential
Output Type
Single-ended. Source Impedance of 50 Ω
drives 1 MΩ oscilloscope input. Load
impedance must be greater than 50 kΩ for
stated accuracy
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Specifications
Table 6: Nominal Electrical Characteristics (Cont.)
Gain
Switchable: 1/50 (“50X”) and 1/500 (“500X”)
Audible Overrange
Audible over range sounds whenever ON,
and over range LED is lit.
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Maintenance
Refer to this section for information about maintaining and servicing
the High Voltage Differential Probe.
For terms of the product warranty, refer to the front of this manual.
Should the probe require replacement under terms of the warranty,
return the probe to a Tektronix service center. Refer to page 25 for
packaging instructions.
For a list of replaceable parts, refer to the Replaceable Parts section
on page 35.
For further assistance, refer to Contacting Tektronix on page viii.
Cleaning
Remove dirt with a soft cloth dampened in a mild detergent and
water solution or isopropyl alcohol.
CAUTION. To avoid damaging the probe, use only a mild detergent
and water solution or isopropyl alcohol, do not use any other
solvents or abrasive cleaners. Do not immerse the probe.
Servicing the Compensation Box
Some components of the compensation box can be serviced. These
components include the TEKPROBE interface pins, the probe collar,
and the compensation box covers.
Replacing TEKPROBE Interface Pins
TEKPROBE interface pins can stick and fail to make contact after
time. Periodically check each of the interface pins. Replace any pin
that fails to move freely and fully extend.
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Maintenance
To remove a TEKPROBE interface pin, firmly grasp the pointed tip
with pliers and pull the pin out of the connector. See Figure 7.
No tools are required to install a replacement pin. Insert a new pin
into the connector socket as far as possible using finger pressure. If
necessary, seat the pin into the connector by pressing the tip of the
pin gently but firmly against a hard surface.
Figure 7: Replacing TEKPROBE interface pins
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Maintenance
Removing and Replacing the TEKPROBE Interface Collar
To remove the TEKPROBE interface collar, firmly grasp the
compensation box body with one hand, and the TEKPROBE
interface collar with the other hand. Firmly pull the interface collar
off.
To replace the collar, note the pin configuration on the compensation
box and their holes in the interface collar. The group of three pins fit
through the smaller of the two holes in the interface collar. See
Figure 8.
Align the tab to the slot and gently press the two pieces together. See
Figure 8.
Once installed, the TEKPROBE collar should rotate freely to lock
and unlock.
Tab
Slot
Figure 8: Replacing the TEKPROBE collar
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Maintenance
Removing the Compensation Box Covers
To open the compensation box, follow these steps:
1. Press the optional release tool pins into the compensation box
cover catches and gently lift the cover off a small distance. Refer
to Figure 9, below.
2. Hold the open edge apart, and use the tool to open the other side
of the compensation box.
3. With both sides of the box open, gently separate the two halves of
the compensation box.
Cover
catches
Figure 9: Removing the compensation box covers
Replacing the Compensation Box Covers
To replace the covers, follow these steps:
1. Align the TEKPROBE interface and the strain relief notches with
the tabs on the cover. Refer to Figure 10 on page 25.
2. Press the catches of the bottom cover in and lower the top cover.
3. Slide the tab into the notch.
4. Firmly press the pieces together until the cover catches snap into
place.
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Maintenance
Tab
Figure 10: Replacing the compensation box cover
Packaging For Return Shipment
If possible, use the original packaging to return the probe to
Tektronix. Include the following information: name of purchaser,
return address, name and phone number of a person that Tektronix
may contact, date of purchase, and a description of the defect.
If the original packaging is unfit for use or not available, use the
following packaging guidelines:
1. Select a sturdy shipping carton that has inside dimensions at least
one inch greater than the probe dimensions.
2. Put the probe into a plastic bag or wrap to protect it from
dampness.
3. Place the probe into the box and stabilize it with light packing
material. Seal the carton with shipping tape.
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Maintenance
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WARNING
The following servicing instructions are for use only by
qualified personnel. To avoid injury, do not perform any
servicing other than that stated in the operating instructions
unless you are qualified to do so. Refer to all safety
summaries before performing any service.
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Performance Verification
The following procedure verifies the warranted electrical characteris-
tics of the High Voltage Differential Probe. Table 7 itemizes the
equipment required, provides an example or part number of the
equipment, and explains the purpose of the equipment.
Table 7: List of equipment required
Minimum
requirements
Example or part
number
Description
Purpose
Test oscilloscope Bandwidth: ≥ 400 MHz TDS460A,
Display probe output
TEKPROBE interface
vertical accuracy:
≤ 1.5%
TDS744A, or
TDS784A
Standard ampli-
tude generator
Leveled sine wave Rise time: ≤ 3 ns
generator
DC voltage source
Amplitude accuracy:
≤ 0.75%
Fluke/Wavetek
Check probe attenua-
9100 with oscillo- tion, bandwidth, and
scope option 250 common-mode rejec-
tion ratio
Plunger clamps
(2 required)
Use clamps included in Accessory kit
accessory kit
Connection to binding
post
020-2106-00
Modified BNC
adapter
BNC-male-to-dual
binding post
103-0035-00
Interconnection be-
tween probe and gen-
erator. (See Figure 11
on page 28).
BNC adapter
BNC-female-to-dual
banana
103-0090-00
012-0482-00
011-0049-01
Interconnection be-
tween probe and gen-
erator
Coaxial cables
(2 required)
36 in (0.9144 m),
precision 50 Ω
Interconnection
between oscilloscope
and generator
Terminator
Termination between
probe and generator
during bandwidth mea-
surements
50 Ω precision feed
through
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Performance Verification
Construction of Modified BNC Adapter
Construct the modified BNC Adapter from a BNC-male-to-dual
binding post adapter, Tektronix part number 103-0035-00 (see
Figure 11).
Black and red plastic
post covers
Figure 11: BNC-male-to-dual binding post adapter
To expose the posts that you will connect the P5205 High-Voltage
Differential probe leads to, remove the black and red plastic post
covers of the BNC-male-to-dual adapter. Use a pair of pliers and a
vise to remove the plastic covers, as shown in Figure 12 on page 29.
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Performance Verification
Pliers
Plastic cover removed
Modified BNC adapter
Vise
Figure 12: Removing plastic covers from binding posts
Setup
WARNING. These procedures require the application of high voltage
to the inputs of the P5205 probe. Because this adapter has exposed
metal surface, only qualified personnel should perform testing with
voltage levels that exceed 30 V rms. All pertinent safety rules and
guidelines for elevated voltage measurements should be followed and
adhered to.
Connect the output of the probe to the Channel 3 input of the test
oscilloscope. Let the probe warm up for 20 minutes.
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Performance Verification
NOTE. These procedures assume that you are using an oscilloscope
that automatically displays the correct volts/division scale factor for
the attenuation setting of the probe. If not, you must take the
attenuation setting of the probe into account when setting the
volts/division on the oscilloscope.
Differential Gain Accuracy
1. Set the volts/division on channel 2 of the oscilloscope to 2 V.
H Trigger on channel 2.
H Select 1 MΩ impedance (if option exists on oscilloscope).
H Connect coaxial cable between TRIG OUT of the generator
(rear of Wavetek 9100) and channel 2 of the oscilloscope.
2. Set the volts/division on channel 1 of the oscilloscope to
50 mV/div.
3. Set the seconds/div to 200 ꢀs, and the acquisition mode to
average 32.
4. Connect the coaxial cable from SIG OUT of the generator (rear
of Wavetek 9100) to channel 1 of the oscilloscope.
5. Set the generator to 0.1 V and 1 kHz (AUX, square wave, 1 MΩ
load). Enable the output.
6. Select the amplitude measurement on the oscilloscope and record
the DC amplitude (∼ 100 mV) of square wave. This measurement
is only the oscilloscope.
7. Disable the generator output. Disconnect the coaxial cable from
channel 1 of the oscilloscope and SIG OUT of the generator.
8. Connect the output of the probe to channel 1 of the oscilloscope.
9. Attach the Modified BNC adapter to the SIG OUT of the
generator.
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Performance Verification
10. Attach the differential probe input leads (without attachment
accessories) by sliding the banana plug of the leads onto the
binding posts metal sleeves on the Modified BNC adapter
(see Figure 13).
Modified BNC adapter
(+) Post
(-) Post
Banana plug of probe
input lead
Figure 13: Slide probe leads onto the binding posts
WARNING. To reduce the risk of electric shock, ensure the generator
output is disabled before modifying/disconnecting test setup or
connections since exposed metal may at a hazardous potential. It is
recommended that the generator output amplitude be reduced to
minimum prior to disabling the output.
11. Set the probe to 500X (out). Set the generator for a 100 V and
1 kHz standard amplitude output (AUX, square wave, 1 MΩ
load).
12. Reduce the amplitude on the generator to minimum then enable
the output.
13. Adjust the zero offset on the compensation box of the probe for
zero offset.
14. Record the DC amplitude of the square wave (∼100 V) and divide
1/1000th of this into the amplitude of just the oscilloscope (refer
to step 6). Verify that only the probe gain accuracy
is ᐔ3%.
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Performance Verification
15. Set the calibration generator for 10 V output. Set the attenuation
button on the probe to 50X (in).
16. Record the DC amplitude of the square wave (∼10V) and divide
1/100th of this into only the amplitude of the oscilloscope (refer
to step 6). Verify that only the probe gain accuracy is ᐔ3%.
17. Reduce the amplitude on the generator to minimum then disable
the generator output, leaving the setup connected for the next
procedure.
Bandwidth
1. Connect the Modified BNC adapter through a 50 Ω terminator to
the leveled sine wave output of the generator (AUX, Sine,
50 Ω load).
WARNING. To reduce the risk of electric shock, ensure the generator
output is disabled before modifying/disconnecting test setup or
connections since exposed metal may at a hazardous potential. It is
recommended that the generator output amplitude be reduced to
minimum prior to disabling the output.
2. Attach the differential probe input leads (without attachment
accessories) by sliding the banana plug of the leads onto the
binding posts metal sleeves on the Modified BNC adapter (see
Figure 13 on page 31).
3. Set the bandwidth on the probe to FULL and the attenuation
button to 50X.
4. Set the Volts/Division on channel 1 of the oscilloscope to
500 mV, and sec/div to 20 ꢀs. Set the trace to the center of the
oscilloscope.
5. Reduce the amplitude on the generator to minimum then enable
the output.
6. Set the sine wave generator to 50 kHz, and adjust the amplitude
to 3.00 V as measured on the oscilloscope.
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Performance Verification
7. Set the generator to 100 MHz, and set the oscilloscope to
5 ns/division. Check for ≥ 2.1 V amplitude.
8. Disconnect the setup.
DC CMRR
1. Set the attenuation of the probe to 50X.
2. Set the oscilloscope input coupling to DC, the vertical to
50 mV/div, and the seconds/div to 200 ꢀs. Center the trace on the
display. Set the acquisition mode to average 32.
3. Attach the BNC-female-to-dual-banana adapter to the DC output
of the generator (front of Wavetek 9100). Attach the modified
BNC adapter to the BNC-female-to-dual-banana adapter.
4. Attach the plunger clamps on the differential probe input leads.
5. Twist the input leads together as shown in Figure 3 on page 13,
and connect both probe inputs to the positive terminal of the
modified BNC adapter.
6. Adjust the offset on the probe output to zero.
WARNING. Generator produces hazardous voltages. To avoid risk of
shock, do not touch exposed metal parts after the generator output is
enabled.
7. Set the output of the generator to 500 VDC.
8. Enable the output.
9. Check that the trace on the oscilloscope shifts less than 3.33
divisions (167 mV) from center.
10. Disable the generator output.
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Performance Verification
WARNING. To reduce the risk of electric shock, ensure the generator
output is disabled before modifying/disconnecting test setup or
connections since exposed metal may at a hazardous potential. It is
recommended that the generator output amplitude be reduced to
minimum prior to disabling the output.
11. Disconnect all test equipment.
This completes the performance verification procedure.
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Replaceable Parts
This section contains a list of the replaceable modules for the P5205
probe. Use this list to identify and order replacement parts.
Parts Ordering Information
Replacement parts are available through your local Tektronix field
office or representative.
Changes to Tektronix instruments are sometimes made to accommo-
date improved components as they become available and to give you
the benefit of the latest circuit improvements. Therefore, when
ordering parts, it is important to include the following information in
your order:
H Part number
H Instrument type or model number
H Instrument serial number
H Instrument modification number, if applicable
If you order a part that has been replaced with a different or
improved part, your local Tektronix field office or representative will
contact you concerning any change in part number.
You may exchange your module for a remanufactured module. These
modules cost significantly less than new modules and meet the same
factory specifications. For more information about the module
exchange program, refer to Contacting Tektronix on page viii.
Using the Replaceable Parts List
This section contains a list of the mechanical and/or electrical
components that are replaceable for the P5205 probe. Use this list to
identify and order replacement parts. Table 8 describes each column
in the parts list.
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Replaceable Parts
Table 8: Parts List Column Descriptions
Column Column Name
Description
1
Figure & Index Number
Items in this section are referenced by figure and
index numbers to the exploded view illustrations
that follow.
2
Tektronix Part Number
Serial Number
Use this part number when ordering replacement
parts from Tektronix.
3 and 4
Column three indicates the serial number at
which the part was first effective. Column four
indicates the serial number at which the part was
discontinued. No entries indicates the part is good
for all serial numbers.
5
6
Qty
This indicates the quantity of parts used.
Name & Description
An item name is separated from the description
by a colon (:). Because of space limitations, an
item name may sometimes appear as incomplete.
Use the U.S. Federal Catalog handbook H6-1 for
further item name identification.
7
8
Mfr. Code
This indicates the code of the actual manufacturer
of the part.
Mfr. Part Number
This indicates the actual manufacturer or vendor
part number.
Abbreviations
Abbreviations conform to American National Standard ANSI
Y1.1-1972.
Mfr. Code to Manufacturer Cross Index
The table titled Manufacturers Cross Index shows codes, names, and
addresses of manufacturers or vendors of components listed in the
parts list.
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Replaceable Parts
1
2
4
3
6
5
Figure 14: P5205 Probe and replaceable accessories
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Replaceable Parts
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