Tektronix TCPA300/400,TCP303/305A/312A/404XL User manual

xx
TCPA300/400 Ampliers and
ZZZ
TCP303/305A/312A/404XL Current Probes
Compliance and Safety Instructions
www.tek.com
P071364301*
*
Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or suppliers, and are protected by national copyright laws and international treaty provisions.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Specications and price change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc. 14150 SW Karl Braun Drive P.O. Box 500 Beaverto USA
For product information, sales, service, and technical support:
n, OR 97077
In North America, call 1-800-833-9200. Worldwide, visit www.tek.com to nd contacts in your area.
Table of Contents
Important safety information ........................... .................................. ......................... 1
General safety summary ...................................................................................... 1
Service safety summary.. .................................. ................................ ................... 4
Terms in t hi
Symbols and terms on the product........................................................................... 5
Compliance information ........................................................................................... 6
EMC compliance (TCPA300/400 only)...... ................................ ............................... 6
Safety compliance ............................................................................................. 7
Environmental considerations ................................................................................ 9
Operati
Installation.......................................................................................................... 12
Operate the amplier.................. .................................. ................................ .......... 17
Op
ng considerations ......................................................................................... 10
Product documentation..... ................................ ................................ .................. 11
Standard accessories.................. ................................ .................................. ...... 12
Optional accessories .......................... ................................ ................................ 13
System conguration ............................. ................................ ............................ 13
Conn
Power on the amplier ....................................................................................... 15
Connect the probe to the amplier ................................ ................................ .......... 16
LED indicators .................... .................................. ................................ .......... 18
Overload conditions .... . ..... . ..... . ..... . ..... . ..... . ..... . ..... . ..... . ..... . ..... .... . . ..... . ..... . ..... . .. 19
erate the current probe......................................................................................... 20
Basic operation................................................................................................ 20
Operate the current probe slide.............................................................................. 21
Degauss and autobalance the current probe.......................................... ...................... 24
Use the ground lead........................................................................................... 25
Make DC current measurements............................................................................ 26
Make AC current measurements............................................................................ 28
s manual ... ................................ ................................ ....................... 4
ect the amplier to an oscilloscope ..... . ..... . ..... . ..... . ..... . ..... . ..... . ..... .... . . ..... . ..... . .. 14
Ampliers and Current Probes Compliance and Safety Instructions i
Table of Contents
ii Ampliers and Current Probes Compliance and Safety Instructions
Important safety information
This manual contains information and warnings that must be followed by the user for safe operation and to keep the product in a safe condition.
To safely perform service on this product, additional information is provided at the end of this section. (See page 4, Service safety summary.)
General safety summary
Use the product only as specied. Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. Carefully read all instructions. Retain these instructions for future reference.
TCPA300/400 only: This product shall be used in accordance with local and national codes.
For correct and safe operation of the product, it is essential that you follow generally accepted safety procedures in addition to the safety precautions specied in this manual.
The product is designed to be used by trained personnel only.
Only qualied personnel who are aware of the hazards involved should remove the cover for repair, maintenance, or adjustment.
To avoid re or
personal injury
Before use, always check the product with a known source to be sure it is operating correctly.
This product is not intended for detection of hazardous voltages.
Use personal protective equipment to prevent shock and arc blast injury where hazardous live conductors are exposed.
While using this product, you may need to access other parts of a larger system. Read the safety sections of the other component manuals for warnings and cautions related to operating the system.
When incorporating this equipment into a system, the safety of that system is the responsibility of the assembler of the system.
Use proper power cord. TCPA300/400 only: Use only the power cord specied for this product and certied for the country of use.
Do not use the provided power cord for other products.
Ground the product. TCPA300/400 only: This product is grounded through the grounding conductor of the 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, make sure that the p roduct is properly grounded.
Ampliers and Current Probes Compliance and Safety Instructions 1
Important safety information
Power disconne
from the power source. See instructions for the location. Do not position the equipment so that it is difcult to operate the power cord; it must remain accessible to the user at all times to allow for quick disconnection if needed.
Connect and disconnect properly. TCPA300/400 only: Do not connect or disconnect
Use only current probes, test leads, and adapters supplied with the product, or indicated
Observe all terminal ratings. TCPA300/400 only: To avoid re 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.
Do not apply a potential to a ny terminal, including the common terminal, that exceeds the maximum rating of that terminal.
Do not o
removed, or with the case open. Hazardous voltage exposure is possible.
Avoid exposed circuitry. Do not touch exposed connections and components when powe r is present.
perate without covers. Do not operate this product with covers or panels
ct. TCPA300/400 only: The power cord disconnects the product
probes or test leads while they are connected to the circuit.
by Tektronix to be suitable for the product.
t operate with suspected failures. TCPA300/400 only: If you suspect that
Do no
there is damage to this product, have it inspected by qualied service personnel.
able the product if it is damaged. Do not use the product if it is damaged
Dis or operates incorrectly. If in doubt about safety of the product, turn it off and disconnect the power cord. Clearly mark the product to prevent its further operation.
Before use, inspect current probes, test leads, and accessories for mechanical damage and replace when damaged. Do not use probes or test leads if they are damaged, if there is exposed metal, or if a wear indicator shows.
Examine the exterior of the product before you use it. Look for cracks or missing pieces.
Use only specied replacement parts.
Do not operate in wet/damp conditions. Be aware that condensation may occur if a unit is moved from a cold to a warm environment.
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry. Remove the input signals before you clean
the product.
2Amplifiers and Current Probes Compliance and Safety Instructions
Important safety information
Probes and test leads
Provide proper
instructions in the manual for details on installing the product so it has proper ventilation.
Slots and openings are provided for ventilation and should never be covered or otherwise obstructed. Do not push objects into any of the openings.
Before conn cord from the power connector to a properly grounded power outlet.
Keep nger indicator on the probes.
Remove al
Use only correct Measurement Category (CAT), voltage, temperature, altitude, and ampe
Beware of high voltages. Understand the voltage and current ratings for the probe you are using and do not exceed those ratings.
The v oltage rating for the TCPA300/400 depends on the probe and your application. Refer to the Specications section of the manual for more information.
ventilation. TCPA300/400 only: Refer to the installation
ecting probes or test leads to the TCPA300/400, connect the power
s behind the protective barrier, protective nger guard, or tactile
l probes, test leads and accessories that are not in use.
rage rated probes, test leads, and adapters for any measurement.
ect and disconnect properly. TCP303/305A/312A/404XL only: Connect
Conn
the probe output to the measurement product before connecting the probe to the circuit under test. Connect the probe reference lead to the circuit under test before connecting the probe input. Disconnect the probe input and the probe reference lead from the circuit under test before disconnecting the probe from the measurement product.
Connect and disconnect properly. De-energize the circuit under test before connecting or disconnecting the current probe.
TCPA300/400 only: Connect the probe reference lead to earth ground only.
Do not connect a current probe to any wire that carries voltages or frequencies above the current probe voltage rating.
Inspect the probe and accessories. Before each use, inspect probe and accessories for damage (cuts, tears, or defects in the probe body, accessories, or cable jacket). Disable and do not use the current probe if it is damaged. Do not use the product if it is damaged or operates incorrectly.
Examine the exterior of the current probe before you use it. Look for cracks or missing pieces.
Use only specied replacement parts.
Ampliers and Current Probes Compliance and Safety Instructions 3
Important safety information
Service safet
ysummary
The Service safety summary section contains additional information required to safely perform service on the product. Only qualied personnel should perform service proc summary before performing any service procedures.
To avoid electric shock. Do not touch exposed connections.
Do not service alone. Do not perform internal service or adjustments of this
product un present.
Disconnect power. To avoid electric shock, switch off the product power and disconnect the power cord from the mains power before removing any covers or panels, or opening the case for servicing.
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.
Verify safety after repair. Always recheck ground continuity and mains dielectric stre
edures. Read this Service safety summary and the General safety
less another person capable of rendering rst aid and resuscitation is
ngth after performing a repair.
Termsinthismanual
se terms may appear in this manual:
The
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.
4Amplifiers and Current Probes Compliance and Safety Instructions
Important safety information
Symbols and te
Ampliers
rms 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.
When this symbol is marked on the product, be sure to consult the manual to nd out the nature of the potential hazards and any actions which have to be taken to avoid them. (This symbol may also be used to refer the user to ratings in the manual.)
The following symbol(s) may appear on the TCPA300/400 ampliers:
Probes
The following symbol(s) may appear on the TCP303/305A/312A/404XL current probes:
Ampliers and Current Probes Compliance and Safety Instructions 5
Compliance information
Compliance in
formation
This section
lists the EMC (electromagnetic compliance), safety, and environmental standards with which the instrument complies. This product is intended for use by professionals and trained personnel only; it is not designed for use in households or by children.
Questions about the following compliance information may be directed to the following address:
Tektronix, Inc. PO Box 500, MS 19-045 Beaverton, OR 97077, USA www.tek.com
EMC compliance (TCPA300/400 only)
EU EMC Directive
Meets intent of Directive 2014/30/EU for Electromagnetic Compatibility. Compliance was demonstrated to the following specications as listed in the Ofcial Journal of the European Communities:
EN 61326-1, EN 61326-2-1. EMC requirements for electrical equipment for measurement, control, and laboratory use.
1234
CISPR 11. Radiated and conducted emissions, Group 1, Class A
IEC 61000-4-2. Electrostatic discharge immunity
IEC 61000-4-3. RF electromagnetic eld immunity
IEC 61000-4-4. Electrical fast transient/burst immunity
IEC 61000-4-5. Power line surge immunity
IEC 61000-4-6. Conducted RF immunity
IEC 61000-4-11. Voltage dips and interruptions immunity
EN 61000-3-2. AC power line harmonic emissions
EN 61000-3-3. Voltage changes, uctuations, and icker
1
This product is intended for use in nonresidential areas only. Use in residential areas may cause electromagnetic interference.
2
Emissions which exceed the levels required by t his s tandard may occur when this equipment is connected to a test object.
3
Equipment may not meet the immunity req probes are connected due to coupling of electromagnetic interference onto those leads/probes. To minimize the inuence of electromagnetic interference, minimize the loop area between the unshielded portions of signal and associated return leads, and keep leads a s far away as possible from electromagnetic disturbance sources. Twisting unshielded test leads together is an effective way to reduce loop area. For probes, keep the ground
uirements of applicable listed standards when test leads and/or test
6Amplifiers and Current Probes Compliance and Safety Instructions
Compliance information
EMC compliance
Australia / New Zealand
Safety c
ompliance
EMC
return lead as s accomplish this most effectively. In all cases, observe all safety instructions for the probes or leads used.
4
For complianc impedance connection between the cable shield and the connector shell should be used.
hort as possible and close to the probe body. Some probes have accessory probe tip adapters to
e with the EMC standards listed here, high quality shielded interface cables that incorporate low
Meets the intent of Directive 2014/30/EU for Electromagnetic Compatibility when it is use
d with the product(s) stated in the specications table. Refer to the EMC specication published for the stated products. May not meet the intent of the directive if used with other products.
Complies w
ith the EMC provision of the Radiocommunications Act per the
following standard, in accordance with ACMA:
EN 61326-
1 and EN 61326-2-1. Radiated and Conducted Emissions, Group 1,
Class A.
This section lists the safety standards with which the product complies and other safety compliance information.
EU low v
oltage directive
U.S. nationally recognized
testing laboratory listing
Compliance was demonstrated to the following specication as listed in the Ofcial Journal of the European Union:
Low Voltage Directive 2014/35/EU.
EN 61010-1. Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use – Part 1: General Requirements.
EN 61010-2-032. (TCP303/305A/312A/404XL only) Particular requirements for handheld current clamps for electrical measurement and test equipment.
UL 61010-1. (TCPA300/400 and TCP305A/312A only) Safety Requirements for Electrical Equipment for Measurement, Control, and L aboratory Use – Part 1: General Requirements.
UL 3111-1. (TCP303/404XL only) Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use – Part 1: General Requirements.
UL 61010-2-032. (TCP305A/312A only) Particular requirements for handheld current clamps for electrical measurement and test equipment.
IEC 3111-2-032. (TCP303/404XL only) Particular requirements for handheld current clamps for electrical measurement and test equipment.
Ampliers and Current Probes Compliance and Safety Instructions 7
Compliance information
Canadian certication
Additional compliances
Equipment type
Safety class
Pollution degree
descriptions
CAN/CSA-C22.2
Equipment for Measurement, Control, and Laboratory Use – Part 1: General Requirements.
CAN/CSA-C22.2 No. 61010-2-032. (TCP305A/312A only) Particular
requirements for handheld and hand manipulated current sensors for electrical measurement and test equipment.
IEC 61010-1. Safety Requirements for Electrical Equipment for
Measurement, Control, and Laboratory Use – Part 1: General Requirements.
IEC 61010-2-032. (TCP303/305A/312A/404XL only) Particular
requirements for handheld current clamps for electrical measurement and test equipment.
Test and measuring equipment.
TCPA300/400 only: Class 1 – grounded product.
A measure of the contaminants that could occur in the environment around and within a product. Typically the internal environment inside a product is considered to be the same as the external. Products should be used only in the environment for which they are rated.
No. 61010-1. Safety Requirements for Electrical
ollution degree rating
P
IP rating
Pollution degree 1. No pollution or only dry, nonconductive pollution occurs.
Products in this category are generally encapsulated, hermetically sealed, or located in clean rooms.
Pollution degree 2. Normally only dry, nonconductive pollution occurs.
Occasionally a temporary conductivity that is caused by condensation must be expected. This location is a typical ofce/home environment. Temporary condensation occurs only when the product is out of service.
Pollution degree 3. Conductive pollution, or dry, nonconductive pollution
that becomes conductive due to condensation. These are sheltered locations where neither temperature nor humidity is controlled. The area is protected from direct sunshine, rain, or direct wind.
Pollution degree 4. Pollution that generates persistent conductivity through
conductive dust, rain, o r snow. Typical outdoor locations.
Pollution degree 2 (as dened in IEC 61010-1). Rated for indoor, dry location use only.
IP20 (as dened in IEC 60529).
8Amplifiers and Current Probes Compliance and Safety Instructions
Compliance information
Measurement and
overvoltage category
descriptions
Mains overvoltage
Measurement te from one or more of the following categories (see specic ratings marked on the product and in the manual).
Category II. Circuits directly connected to the building wiring at utilization points (socket outlets and similar points).
Category III. In the building wiring and distribution system.
Category IV
NOTE. Only mains power supply circuits have an overvoltage category rating.
Only measurement circuits have a measurement category rating. Other circuits within the product do not have either rating.
TCPA300/400 only: Overvoltage category II (as dened in IEC 61010-1).
category rating
Environmental considerations
This section provides information about the environmental impact of the product.
rminals on this product may be rated for measuring mains voltages
. At the source of the electrical supply to the building.
Restriction of hazardous
substances
Product end-of-life
handling
Complies with RoHS2 Directive 2011/65/EU.
rve the following guidelines when recycling an instrument or component:
Obse
Equipment recycling. Production of this equipment required the extraction and use of natural resources. The equipment may contain substances that could be harmful to the environment or human health if improperly handled at the product’s end of life. To avoid release of such substances into the environment and to
duce the use of natural resources, we encourage you to recycle this product in
re an appropriate system that will ensure that most of the materials are reused or recycled appropriately.
This symbol indicates that this product complies with the applicable European
nion requirements according to Directives 2012/19/EU and 2006/66/EC
U on waste electrical and electronic equipment (WEEE) and batteries. For information about recycling options, check the Tektronix Web site
www.tek.com/productrecycling).
(
Ampliers and Current Probes Compliance and Safety Instructions 9
Operating considerations
Operating con
Environmental
TCPA300 and TCPA400
power
siderations
Characteristic Probes and ampliers
Temperature
Operating 0 to +50 °C (32 to 122 °F)
Nonoperating
Humidity
Operating 5 to 95% R.H. to +30 °C (86 °F)
Nonoperating
Altitude
Operating Up to 2000 m (6,560 ft.)
Nonoperating
Pollution degree 2, Indoor use only
cteristic
Chara
Input voltage
Maximum power 50 watts maximum
-40 to +75 °C (-40 to 167 °F)
5to85%R.H.+30to+50°C(86to122°F)
+30 to +46 °C (+86 to +115 °F) 0-90% RH
Up to 12,192 m (40,000 ft.)
00 and TCPA400 ampliers
TCPA3
40 VAC, 47 Hz to 440 Hz, single phase
100–2
TCP312A and TCP305A
probes
Characteristic TCP312A probe TCP305A probe
Input current
Maximum input current ratings
Maximum voltage on bare wire
Maximum Amp·Second product
0–50 A (Peak pulse) 0–50 A DC (Peak pulse)
10 A/V Range:
30 ADC (Continuous)
(Sinusoidal)
21 A
RMS
50 Apk (Peak pulse)
1 A/V Range:
5 ADC (Continuous)
3.5 A
50 Apk (Peak pulse)
150 V C AT II 150 V C AT II
1A/V-50A· μs
10 A/V - 500 A· μs
(Sinusoidal)
RMS
10 A/V Range:
50 ADC (Continuous)
35 A
50 Apk (Peak pulse)
5 A /V Range:
25 ADC (Continuous)
17.7 A
50 Apk (Peak pulse)
5 A/V - 500 A· μs
10 A/V - NA
(Sinusoidal)
RMS
(Sinusoidal)
RMS
10 Ampliers and Current Probes Compliance and Safety Instructions
Operating considerations
TCP303 and TCP
404XL
probes
Characteristic TCP303 probe TCP404XL probe
Input current
Maximum input current ratings
0–500 A DC (Peak pulse) 0–750 A DC (Peak pulse)
50 A/V Range:
150 ADC (Cont
150 A
RMS
inuous)
(Sinusoidal)
500 Apk (Peak pulse)
1
1 A/mV Range:
500 ADC (Cont
inuous)
750 ADC (Noncontinuous)
500 A
750 Apk (Pea
(Sinusoidal)
RMS
k pulse)
5 A/V Range:
25 ADC (Continuous)
Sinusoidal)
RMS
(
17.7 A
500 Apk (Peak pulse)
Maximum v
oltage on
600 V
CAT I & II 600 V
RMS
CAT I & II
RMS
bare wire
Maximum Amp·Second product
1
Control box derated to 100 Arms above 40 °C
2
WARNING: To reduce the risk of re or burn, refer to TCP404XL Maximum Measurement Times for intermittent operation in the TCPA300/400 Ampliers and TCP300A/400 Series Current Probes User Manual, Tektronix part number 077-1183-xx, for maximum currents and duty cycles before use.
5 A/V - 3000 A· μs
50 A/V - 15000 A· μs
NA
2
Product documentation
The following table lists the user documentation available for the products covered by this document. These documents can be downloaded from the Tektronix website (www.tek.com/downloads).
Tektronix
Document Language
TCPA300/400 Ampliers and TCP303/305A/312A/404XL
English 071-3643-xx Current Probes Compliance and Safety Instructions (this document)
TCPA300/400 Ampliers and TCP300A/400 Series AC/DC Current Probes User Manual
English
Japanese
Russian
TCPA300/400 Ampliers and TCP300A/400 Series
English 077-0323-xx AC/DC Current Probes Service Manual
part number
077-1183-xx
077-1184-xx
077-0322-xx
Ampliers and Current Probes Compliance and Safety Instructions 11
Installation
Installation
The TCPA300 and TCPA400 current probe ampliers let you use one probe to simultaneously measure AC and DC current. The ampliers convert the sensed current into oscilloscope. The ampliers and associated probes provide these features:
a proportional voltage signal that you can measure directly with an
Standard accessories
Ampliers
Simultaneo
High sensitivity
One-button autobalancing and probe degaussing
No adjustments needed to match a current probe to an individual amplier
AC or DC coupling of signal
Direct scaling and unit readout on compatible TEKPROBE level II
oscilloscopes
The following accessories are shipped with the ampliers and probes.
llowing accessories are shipped with the TCPA300 and TCPA400
The fo ampliers.
Powe
TEKPROBE Interconnect Cable
us DC and AC current measurements up to 750 A peak
r Cord (customer-chosen option)
Certicate of Traceable Calibration
Probes
12 Ampliers and Current Probes Compliance and Safety Instructions
When you order a current probe, you will receive these accessories:
Probe cover (TCP303 and TCP404XL only)
robe ground lead, 6 inch length (TCP305A and TCP312A only)
P
Instruction Sheet
Certicate of Traceable Calibration
Installation
Optional acce
ssories
You can order the following optional accessories for the ampliers and probes.
One-turn 50 HF current loop. Two versions are available; one for each style of probe. The current loops are used in the performance verication procedures for checking the performance of the TCPA300 Amplier and the compati
50 feedthrough termination, 2 W (Tektronix part number 011-0049-xx)
50 BNC-to-BNC coaxial cable (Tektronix part number 012-0117-xx)
TCPA Calibration Adapter. Use the TCPA Calibration Adapter to verify the amplier(s) performance independent of the current probes.
Travel Case. The travel case includes room to store one amplier and two current probes, along with related cables and adapters.
Deskew Fixture. This xture converts the PROBE COMPENSATION output or TRIGGER OUTPUT of the TDS5000 or TDS7000 into a set of test point connections that allow you a convenient way to compensate for timing
rences between voltage and current probes.
diffe
ble probes.
System conguration
plete current measurement system consists of a current probe amplier, a
Acom compatible current probe, and an appropriate oscilloscope. (See Figure 1.)
Figure 1: Typical TCPA300/400 current measurement system
1. 50 oscilloscope input — use the supplied TEKPROBE Interface Cable or
usea50Ω BNC cable, which is available as an optional accessory.
NOTE. If the oscilloscope only has a high-impedance input, you will need to add
a50termination, which is available as an optional accessory.
Ampliers and Current Probes Compliance and Safety Instructions 13
Installation
TCPA300 and TCPA400
ampliers
Current probes
Oscilloscope
The amplier am to a proportional voltage that is displayed on an oscilloscope or other similar measuring device.
The followin TCPA300 Amplier:
TCP312A (30
TCP305A (50 A, 50 MHz)
TCP303 (150 A, 15 MHz)
The following Tektronix current probe is compatible with the TCPA400 Amplier:
TCP404XL (750 A1,2MHz)
1
500 A continuous, 750 A DC derated with duty cycle
An oscilloscope displays the output from the current measuring system. A 50
s included to connect the amplier to the oscilloscope input channel. A
cable i TEKPROBE-to-TEKPROBE interface cable is also included for connecting to TEKPROBE level II oscilloscopes.
plies the current sensed by the probe and converts the current
g Tektronix current probes are compatible with the
A, 100 MHz)
If the oscilloscope does not have an input that can be set to 50 impedance, you need a feedthrough 50 termination. This termination is available as a standard accessory with your TCPA300 and TCPA400 Current Probe Ampliers.
Connect the amplier to an oscilloscope
You will need an oscilloscope to display the TCPA300 and TCPA400 measurement output. To use the full dynamic range of the probe/amplier combination, the oscilloscope must be capable of displaying a vertical scale factor of 1 mV/div to
/div.
1V
If you are using a TEKPROBE II-compatible oscilloscope, use the supplied
EKPROBE-to-TEKPROBE interface cable to connect the amplier OUTPUT
T connector to your oscilloscope. Otherwise, use a 50 BNC cable (available as an optional accessory) to connect the amplier OUTPUT connector to your oscilloscope. (See Figure 1 on page 13.)
The input impedance of the oscilloscope channel must be 50 , or you will encounter slowed pulse response, increased aberrations, or incorrect DC measurement amplitudes. If your oscilloscope provides only 1 M inputs, you need to attach a 50 feed-through termination (available as an optional accessory) between the oscilloscope input and the BNC cable. Do not install this termination at the amplier end of the BNC cable.
14 Ampliers and Current Probes Compliance and Safety Instructions
Installation
Power on the amplier
To utilize the f attached current probe, the oscilloscope bandwidth must be approximately ve times that of the current probe. For example, when using a TCP312A Current Probe, the oscilloscope bandwidth must be at least 500 MHz. When using a TCP305A Current Probe, the oscilloscope bandwidth must be at least 250 MHz.
After you have connected the amplier to the oscilloscope, allow the equipment to warm up to a stable t emperature; usually 20 minutes is required.
NOTE. To obtain accurate measurements, the input impedance of your
oscillosc an oscilloscope input using a 50 BNC cable, and that the oscilloscope input is set to 50 impedance.
1. Connect the power cord to the power input connector on the rear of the
amplier, and then connect the power cord to your local mains supply ( 1 0 0 VA C t o 2 4 0 VA C , 5 0 H z to 40 0 Hz ) .
2. To allow for proper ventilation, place the rear panel of the amplier at least
2 inches away from any obstructions. Set the amplier on the bottom rubber
, and keep papers and other items away from the bottom of the amplier
feet which could restrict airow and cause overheating.
ull bandwidth capability of the TCPA300 and TCPA400 and
ope must be 50 . Make sure your amplier OUTPUT is connected to
3. Pres
NOTE. The amplier stores the power state it is in when the power cord is
unplugged. If you do not put the amplier into STANDBY mode before unplugging it, the amplier will power on immediately when you plug it in again.
4. Degauss the probe before taking measurements. For more information, refer
NOTE. The amplier stores the power state it is in when the power cord is
unplugged. If you do not put the amplier into STANDBY mode before unplugging it, the amplier will power on immediately when you plug it in again.
When you connect a probe to the amplier, the amplier uses detection circuitry to indicate probe conditions such as noncompatible probe type and probe open.
s the ON/STANDBY button on the amplier front panel. The amplier
goes through a self-test and cycles the front-panel LEDs.
to the TCPA300/400 Ampliers and TCP300A/400 Series Current Probes User Manual, Tektronix part number 077-1183-xx, for additional instructions on degaussing and performing a functional check.
Ampliers and Current Probes Compliance and Safety Instructions 15
Installation
Connect the pr
obe to the amplier
To connect a current probe to the amplier input connector, do the following and refer to the illustration. (See Figure 2.)
1. To connect the probe, align the red dots.
2. Push the probe connector in. Do not twist the connector.
3. To disconnect the probe, pull back the collar.
4. Pull out the connector.
Figure 2: Connecting and disconnecting a current probe to the amplier
CAUTION. Handle current probes with care. Do not drop a probe or subject it to
ct, or the core may crack.
impa
Do not connect or disconnect a current probe while the probe is clamped around a
ve conductor, or the probe may suffer electrical damage.
li
If you connect a probe to the wrong amplier, (for example, a TCP312A to a
PA400), the NONCOMPATIBLE PROBE TYPE LED illuminates. Disconnect
TC the probe and use the correct amplier. The TCPA400 amplier accepts TCP3XXA probes, but will only operate properly with TCP4XX probes.
Each current probe is calibrated before it is shipped, and should not require further adjustment. If a probe requires adjustment, information is a vailable in the service manual. The adjustment p rocedure must be performed only by qualied service personnel. Contact your nearest Tektronix Service Center if you need more assistan ce.
16 Ampliers and Current Probes Compliance and Safety Instructions
Operate the amplier
Operate the am
plier
The TCPA300 a described below. Some seldom-used functions do not appear in the illustration. These functions are discussed in the product user manual.
nd TCPA400 front-panel controls and connectors function as
Figure 3: Amplier front panel (TCPA300 shown)
1. The PROBE DEGAUSS AUTOBALANCE button removes residual
magnetism from the attached current probe. A multi-color LED indicates the status of the degauss circuit.
2. The MANUAL BALANCE buttons allow you to ne-adjust DC offset from
the amplier. The adjacent LED lights when one of the buttons has been pressed.
3. The four probe error lights indicate the following faults: PROBE OPEN,
OVERLOAD (current or temperature), NOT TERMINATED INTO 50 and
ONCOMPATIBLE PROBE TYPE.
N
4. The ON/STANDBY button turns on power to the amplier.
5. The TCPA300 and TCPA400 output appears at the OUTPUT connector.
Connect this to a 50 input of your oscilloscope.
Ampliers and Current Probes Compliance and Safety Instructions 17
Operate the amplier
LED indicators
6. The current pro
bes connect to the TCPA300 and TCPA400 at the PROBE
INPUT connector.
7. The COUPLING b
utton selects AC or DC probe coupling, as indicated by
the LEDs.
8. The RANGE bu
tton toggles between the two scale factors that are available
for the attached probe (TCPA300 only). LEDs indicate the selected range.
Indicators Function
PROBE OPEN
OVERLOAD When lit, this LED indicates different overload conditions. (See page 19,
NOT TERMIN INTO 50
NONCOMPATIBLE PROBE TYPE
ATED
When lit, t must have the probe slide locked to degauss the probe or to accurately measure current.
CAUTION: that the probe slide is locked before you apply power to the circuit.
Overload conditions.)
When lit, this LED indicates that the T EKPROBE Interface able or BNC cable f on the oscilloscope. Switch the termination setting on the oscilloscope to 50 ,orusea50termination on the oscilloscope input.
NOTE. N DEGAUSS AUTOBALANCE operation.
When l amplier is not designed to work with the amplier. TCP3XX probes only work with the TCPA300 Amplier, and the TCP404XL probe only works
his LED indicates that the current probe is unlocked. You
To reduce risk of re when using bare conductors, ensure
rom the OUTPUT of the amplier is not connected to a 50 input
OT TERMINATED INTO 50 is only detected during the
it, this LED indicates that the probe that is connected to the
with the TCPA400 Amplier.
18 Ampliers and Current Probes Compliance and Safety Instructions
Operate the amplier
Overload cond
itions
LED color Overload condition Recommended action
Solid red
Flashing red
Solid orange
Flashing red and orange
All LEDs ashing
1
Since c Temperature shifts can also affect the probe accuracy; degauss the probe if the probe head or amplier temperature changes more than 5 °C.
Measured continuous current is exceeding the continuous current limit of the probe.
Measured current waveform has pulses that are exceeding the limits of the probe.
The operating temperature of the probe or the amplier has been exceeded.
Both temperature and current limits have been exceeded.
Probe & amplier thermal shutdown has occurred.
urrent overloads can magnetize the probe, always degauss the probe after an overload condition.
Disconnect the probe from the current source.
Reduce the current source amplitude or use a higher probe current range or a higher-rated current probe.
Disconnect the probe from current source and allow time for the probe head and amplier to cool. Shorten the measurement time duration or use a higher-rated current probe.
Disconnect the probe from the current source. Power-cycle the amplier and let the probe and amplier adequately cool down (typically 15 m inutes) before taking measurements again. Shorten the measurement time duration or use a higher-rated current probe.
1
WAR NI NG . To avoid personal injury or equipment damage, do not exceed the
specied electrical limits of the TCPA300 and TCPA400 Ampliers or any applicable probe accessories.
Ampliers and Current Probes Compliance and Safety Instructions 19
Operate the current probe
Operate the cu
Basic operation
rrent probe
1. Connect the
amplier.)
2. TCP305A and (See page 25, Use the ground lead.)
3. Degauss t probe.)
CAUTION. To prevent inaccurate measurements, always degauss the current probe
before taking measurements.
4. Insert a conductor into the probe. (See page 21, Operate the current probe slide.)
5. Observe the amplier and oscilloscope to make measurements.
probe to the amplier. (See page 16, Connect the probe to the
TCP312A only: If desired, install the ground lead to the probe.
he probe. (See page 24, Degauss and autobalance the current
Operation precautions
WARNING. To prevent risk of electric shock or burn, keep your hands behind the
tactile barrier which indicates the limit of safe access.
CAUTION. To prevent risk of re, do not connect or disconnect the current probe
to or from a live, uninsulated conductor. The core is not insulated. When you test
insulated circuits, remove power before you connect or disconnect the probe.
un
WARNING. These probes are not rated for bare-wire voltages above 150 V Cat II,
nd insulated-conductor voltages above 300 V Cat II. To reduce risk of electric
a shock, do not take measurements with these probes on circuits with voltages above these limits.
NOTE. An insulated conductor is any conductor that is surrounded by an
insulating material that is capable of isolating the voltage present on the conductor. Lacquer coatings like those typically found on transformer windings do not provide sufcient, reliable insulation for use with current probes. The lacquer coating can be easily nicked or damaged, which compromises the insulating capabilities of the lacquer coating.
20 Ampliers and Current Probes Compliance and Safety Instructions
CAUTION. To prevent damage to the TCP305A & TCP312A probes, do not drop
the probe, sub insert insulated conductors larger than 5.0 mm (0.2 in) into the probe jaw or damage may result. If the slider will not close around the conductors, do not force the slide closed; either reduce the number of conductors, or use a smaller conductor, if possible, without exceeding the amperage rating of the wire.
CAUTION. To reduce risk of re, do not connect or disconnect the current probe to
or from a live, uninsulated conductor. The core is not insulated. Always remove power before you c onnect or disconnect the probe to or from bare conductors.
To improve EMI rejection at high frequencies, use the optional ground lead. Refer to the TCPA300/400 Ampliers and TCP300A/400 Series Current Probes User Manual,
Tektronix part number 077-1183-xx, for additional instructions.
Operate the current probe slide
Operate the current probe
ject it to physical shock or rapid temperature changes, and do not
TCP305A and TCP312A
slide operation
rrent probes each have a slide mechanism that opens and closes the probe
The cu jaw. This allows you to clamp the probe around a conductor under test. The slide must be locked closed to accurately measure current or to degauss the probe. If a probe is unlocked, the PROBE OPEN indicator on the amplier will light.
The current probes can be used to measure current on uninsulated wires. However, the circuit must be de-energized when connecting or removing the current probe.
The slide operation of the TCP305A and TCP312A current probes is shown in the following illustration.
Ampliers and Current Probes Compliance and Safety Instructions 21
Operate the current probe
To o perate t he p
1. To close (lock) the probe, push the slide forward until the detent snaps into place.
NOTE. The slider must be in the closed (locked) position to degauss the probe.
2. To open (unl
3. Insert a 5 mm (0.2 in) diameter maximum conductor size into the jaw.
WARNING.
(0.2 in) diameter into the jaw.
4. Close th measurements, keep your ngers behind the demarcations on the probe, and away from the shaded area shown below.
robe:
ock) the probe, pull the slide back until the jaw is open.
To prevent probe damage, do not force conductors larger than 5 mm
e jaw around the conductor and lock the slider. When you are taking
RNING. Do not connect the current probe to any wire that carries voltages or
WA
currents that exceed the rating of the probes.
22 Ampliers and Current Probes Compliance and Safety Instructions
Operate the current probe
TCP303 and TCP404XL
slide operation
The slide opera following illustration.
To operate the probe:
1. Press the bottom of the lock button to unlock the probe.
2. Squeeze the handle until the core is open.
3. Insert a 5 mm (0.2 in) diameter maximum conductor size into the jaw.
tion of the TCP303 and TCP404XL current probes is shown in the
WAR NI NG . To prevent probe damage, do not force conductors larger than 5 mm
(0.2 in) diameter into the jaw.
4. To close and lock the probe, release the squeeze handle and press the top of the lock button. When you are taking measurements, keep your ngers behind the demarcations on the probe, and away from the shaded area shown above.
WAR NI NG . Do not c onnect the current probe to any wire that carries voltages or
rents that exceed the rating of the probes.
cur
Ampliers and Current Probes Compliance and Safety Instructions 23
Operate the current probe
Degauss and autobalance the current probe
Degauss the probe to remove any residual magnetization from the probe core. Such residual magnetization can induce measurement error. Autobalancing removes unwanted DC offsets in the amplier circuitry. Failure to degauss the probe is a leading cause of measurement errors. The DEGAUSS LED ashes until you de
To degauss the probe, disconnect the probe from the test circuit, or ensure that the conduc the amplier PROBE DEGAUSS AUTOBALANCE button on the front panel of the amplier. To maintain measurement accuracy, degauss your probe in each of these cases:
After you turn on the amplier and allow a 20-minute warm-up period.
Before you connect the probe to a conductor.
gauss the probe.
tor under test has no power, close and lock the slide, and then press
Wheneve
Whenever you connect a new probe.
Whenever you subject the probe to a strong external magnetic eld.
Periodically during normal use.
To degauss and autobalance a current probe, perform these steps:
1. Verify that the current probe is connected to the amplier.
2. Rem
3. Lock the probe slide closed.
4. Press the amplier PROBE DEGAUSS AUTOBALANCE button.
5. Wait about ve seconds for the degauss procedure to complete.
The PROBE DEGAUSS AUTOBALANCE LED glows g reen when the operation has successfully completed. If the LED is blinking orange, the degauss operation is still in progress. If the LED is red, the operation failed, and the cause of the failure needs to be found and xed. (See page 17, Operate the amplier.)
NOTE. The degauss procedure will fail if the amplier is not properly connected
to an oscilloscope having 50 input impedance. If this occurs, the NOT TERMINATED INTO 50 LED lights on the amplier front panel.
r a current or thermal overload condition occurs.
ove the current probe from the conductor under test.
After you have completed the oscilloscope adjustments and the amplier degauss/autobalance procedure, your system is ready to measure current.
24 Ampliers and Current Probes Compliance and Safety Instructions
Use the ground lead
Operate the current probe
The TCP305A and TCP312A probes include a 6-inch ground lead. The ground lead grounds the shield around the probe transformer at the probe end of the cable. This allows you to move the ground connection closer to the circuit you are measuring, thereby improving high frequency shielding. The ground lead clips onto the gro
und connector on the bottom of the probe.
Figure 4: Connecting the ground lead
The ground lead on the current probes is intended to be used in high dV/dt
onments. The probes have a grounded shield between the conductor under
envir test and the current sense transformer. Any capacitively-coupled current will then ow in the ground instead of the transformer windings.
When you take high frequency measurements, connect the probe ground lead to the probe ground connector and attach the alligator clip directly to RF ground to improve EMI rejection at high frequencies (2 MHz and above). This will reduce ringing and help bypass capacitively-coupled RF currents which can ow into the probe cable. In some cases, it may be helpful to move the ground lead or
position the probe away from noise sources in the circuit under test.
re
Ampliers and Current Probes Compliance and Safety Instructions 25
Operate the current probe
Make DC curren
t measurements
To measure DC current, rst degauss the probe. (See page 24, Degauss and autobalance the current probe.)
1. Verify that the amplier and the oscilloscope input coupling are set to DC, and the input impedance is set to 50 Ω.
2. Lock the probe closed without a conductor passing through it.
3. Adjust the ground reference of the oscilloscope to move the trace to the
desired graticule line.
4. Press the amplier PROBE DEGAUSS AUTOBALANCE button.
The NOT TERMINATED INTO 50 LED is lighted if impedance is not 50 Ω. If this is the case , make necessary changes. (For example, use a 50 Ω termination.)
5. After the degauss/autobalance routine completes, adjust the ground reference (if necessary) using the amplier MANUAL BALANCE controls.
WARNING. The current probes can be used to measure current on uninsulated
. However, the circuit must be de-energized when connecting or removing
wires the current probe.
26 Ampliers and Current Probes Compliance and Safety Instructions
Operate the current probe
The current pro
Notice that the probe arrow points toward the negative terminal of the power supplytoconf To measure DC current, perform these steps:
1. Open the pro then lock the slide.
2. For correct the direction of conventional (positive to negative) current ow. Reversing the ow will display the current waveform upside-down on the oscilloscope.
3. Adjust the oscilloscope time base, trigger, and gain as needed.
be is shown connected to a power supply line. (See Figure 5.)
orm to the conventional current ow of positive (+) to negative (-).
be slide, place the probe around the conductor under test, and
measurement polarity, make sure the probe arrow is pointing in
Figure 5: Arrow on current probe indicates conventional current ow
Ampliers and Current Probes Compliance and Safety Instructions 27
Operate the current probe
Make AC curren
t measurements
To measure AC current only, and remove the DC component of the current being measured, follow the instructions below. These are identical to the instructions for DC current me
1. Verify that the oscilloscope input coupling is set to DC, and the input impedance i amplier is lit if impedance is not 50 .)
2. Verify tha
3. Adjust the ground reference of the oscilloscope to move the trace to the
desired g
4. Lock the probe closed without a conductor passing through it, and then press the ampl
WARNING. The current probes can be used to measure current on uninsulated
wires. However, the circuit must be de-energized when connecting or removing the current probe.
5. Open the probe slide, place the probe around the conductor under test, and then lock the slide. For correct measurement polarity, make sure the probe arrow is pointing in the direction of conventional (positive to negative) current ow. Reversing the ow will invert the displayed current waveform on the oscilloscope.
asurements except that the ampliercouplinginstep2issettoAC.
ssetto50. (The NOT TERMINATED INTO 50 LED on the
t the amplier input coupling is AC.
raticule line.
ier PROBE DEGAUSS AUTOBALANCE button.
E. Even when making AC current measurements, leave the oscilloscope
NOT
coupling on DC. Change only the amplier coupling to AC. Using the oscilloscope AC coupling may cause the amplier to exceed its output dynamic range.
6. Adjust the oscilloscope time base and trigger as n eeded.
28 Ampliers and Current Probes Compliance and Safety Instructions
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