YOKOGAWA 701928 User manual

User’s
Manual Model 701928/701929
PBC100/050
Current Probe
IM 701928-01E
5th Edition

i
IM 701928-01E
Thank you for purchasing the PBC series current probe.
This user’s manual contains useful information about the functions and
operating procedures of the PBC series current probe and lists the handling
precautions of the instrument. To ensure correct use, please read this manual
thoroughly before beginning operation.
After reading this manual, keep it in a convenient location for quick reference in
the event a question arises during operation.
List of Manuals
The following manuals are provided for the PBC series current probe.
Manual Title Manual No. Notes
Model 701928/701929
PBC100/050 Current Probe
User’s Manual
IM 701928-01E This manual.
Model 701928/701929
PBC100/050 Current Probe
User’s Manual
IM 701928-92 Document for China
Model 701928/701929
PBC100/050 Current Probe
User’s Manual
IM 701928-93Z2 Document for Korea
The “E” and “Z2” in the manual numbers are the language codes.
Contact information of Yokogawa offices worldwide is provided on the following
sheet.
Document No. Description
PIM113-01Z2 List of worldwide contacts
Revisions
1st Edition: October 2007
2nd Edition: October 2013
3rd Edition: November 2015
4th Edition: January 2016
5th Edition : October 2017
5th Edition: October 2017 (YMI)
All Rights Reserved, Copyright © 2005 Yokogawa Electric Corporation
All Rights Reserved, Copyright © 2013 Yokogawa Test & Measurement Corporation

ii IM 701928-01E
Checking the Contents of the Package
If any of the contents are incorrect, missing, or appear to be abnormal, please
contact your nearest YOKOGAWA dealer.
Current Probe (Model 701928/701929) Main Body: 1
User’s manuals: 1 set
Carrying case: 1
Safety Precautions
This instrument satisfies the requirements for IEC-61010.
The general safety precautions described herein must be observed during
all phases of operation. If the instrument is used in a manner not specified
in this manual, the protection provided by the instrument may be impaired.
YOKOGAWA assumes no liability for the customer’s failure to comply with these
requirements.
The following safety symbols are used in this manual.
Warning: Handle with care. Refer to the user’s manual. This symbol
appears on dangerous locations on the instrument which require
special instructions for proper handling or use.
The same symbol appears in the corresponding place in the manual to
identify those instructions.
Do not apply around or remove from HAZARDOUS LIVE conductors.
Failure to comply with the precautions below could lead to injury or
death or damage to the instrument.
WARNING
• Toavoidshortingorbodilyinjurywhenopeningthetipofthesensor
head or when performing measurement, avoid applying the clamp to
bare conductors.
• Donotdamagetheinsulatingcoatingoftheconductorundertest.
• Neverusetheprobewithwethands,orwhentheprobeitselfiswet.
Electric shock can result.
• UseadigitaloscilloscopeequippedwiththeYOKOGAWAprobe
interface to power the probe.
CAUTION
• Thesensorheadhasundergoneaprecisionassemblyprocess.Take
sufficient care when handling the probe as sudden changes in ambient
temperature and physical shocks can damage it.

iii
IM 701928-01E
• Thematchingsurfacesofthesensorheadarepolishedtohigh
precision. Take care when handling. Scratching these surfaces can
affect the performance of the probe.
• Dirtandotherparticlesonthesensorheadcanaffecttheprobe’s
performance. Gently wipe such particles off using a dry, soft cloth.
• Donotinadvertentlytwistorpullthecable.Thewiresinsidethecable
can break, causing malfunction.
• Currentsensorscanbedamagedbystaticelectricity.Becarefulnotto
apply static electricity to current sensors. Below are some ways you
could apply static electricity.
• Touchingthesensorheadwithanobjectchargedwithstaticelectricity
• Touchingthesensorheadwithanobjectwhoseelectricpotentialis
different
• Auserchargedwithstaticelectricitytouchingthecoresurfacewhen
cleaning the matching surfaces of the sensor head
(When cleaning the surfaces, take static electricity measures such as
wearing an antistatic wrist strap.)
• Avoidvibration,shock,andstaticelectricityduringshippingand
handling. Take extra care not to drop the probe.
• Avoidstoringorusingtheprobeindirectsunlight,orinareaswithhigh
temperature, humidity, or condensation. Deformation and deterioration
of insulation can occur resulting in failure to retain product specifications.
• Inspecttheprobebeforeusetoensurethatdamagehasnotoccurred
during shipping and storing. If damage is found, contact your nearest
Yokogawa dealer.
• Thisprobeisnotwaterordustresistant.Donotusetheprobeinareas
with a lot of dust, or near water.
• Whentheprobeisunderpower,alwayskeepthesensorclosedexcept
when positioning the clamp around the conductor under test. Leaving
the clamp open can result in damage.
Note
• Dependingonthecurrentfrequencythatismeasured,oscillationmayoccur,but
this has no effect on measurements.

iv IM 701928-01E
Sales in Each Country or Region
Waste Electrical and Electronic Equipment
Waste Electrical and Electronic Equipment (WEEE), Directive
(This directive is valid only in the EU.)
This product complies with the WEEE directive marking requirement.
This marking indicates that you must not discard this electrical/
electronic product in domestic household waste.
Product Category
With reference to the equipment types in the WEEE directive, this
product is classified as a “Monitoring and control instruments”
product.
When disposing products in the EU, contact your local Yokogawa
Europe B.V. office.
Do not dispose in domestic household waste.
Authorized Representative in the EEA
Yokogawa Europe B.V. is the authorized representative of Yokogawa Test &
Measurement Corporation for this product in the EEA. To contact Yokogawa
Europe B.V., see the separate list of worldwide contacts, PIM 113-01Z2.

v
IM 701928-01E
Symbols and Notation Used in This Manual
 Improperhandlingorusecanleadtoinjurytotheuseror
damage to the instrument. This symbol appears on the
instrument to indicate that the user must refer to the user’s
manual for special instructions.
The same symbol appears in the corresponding place in the
user’s manual to identify those instructions. In the manual, the
symbolisusedinconjunctionwiththeword“WARNING”or
“CAUTION.”
WARNING Calls attention to actions or conditions that could cause serious
orfatalinjurytotheuser,andprecautionsthatcanbetakento
prevent such occurrences.
CAUTION Calls attention to actions or conditions that could cause
lightinjurytotheuserordamagetotheinstrumentoruser’s
data, and precautions that can be taken to prevent such
occurrences.
Note Calls attention to information that is important for proper
operation of the instrument.

vi IM 701928-01E
Contents
List of Manuals................................................................................................................... i
Checking the Contents of the Package............................................................................. ii
Safety Precautions............................................................................................................ ii
Sales in Each Country or Region..................................................................................... iv
Symbols and Notation Used in This Manual ..................................................................... v
Product Overview..............................................................................................................1
Features............................................................................................................................1
Names of Parts .................................................................................................................1
Description of Parts...........................................................................................................2
Operating Procedures.......................................................................................................3
Usage Precautions ................................................................................................3
Preparing for Measurement...................................................................................4
Warm Up................................................................................................................4
DemagnetizationandZeroAdjustment..................................................................4
Performing Measurement ......................................................................................6
Malfunction? First, Investigate. .........................................................................................8
Specifications....................................................................................................................9
Product Specifications ...........................................................................................9
Standards Compliance ..........................................................................................9
Measured Current Values and Current Consumption (Typical) ...........................10
Frequency Characteristics (Typical) .................................................................... 11
Derating According to Frequency ........................................................................ 11
Input Impedance (Typical) ...................................................................................12

1
IM 701928-01E
Product Overview
The PBC series of current probes are 100 MHz/50 MHz bandwidth active
current probes that are used in combination with DLM series or other digital
oscilloscopes equipped with the YOKOGAWA probe interface. The probe can
be used simply by connecting it to the BNC input terminal on the DLM series or
other digital oscilloscope equipped with the YOKOGAWA probe interface.
The probe provides for easy current waveform observation simply by clamping it
around the conductor under test.
Features
• Highly accurate current detection
• Easy current measurement
• Wide frequency bandwidth (DC to 100 MHz/50 MHz)
• Power can be supplied to the probe from DLM series and other digital
oscilloscopes equipped with the YOKOGAWA probe interface.
• The probe is automatically recognized by the DLM series and other digital
oscilloscopes equipped with the YOKOGAWA probe interface.
• Small size and light weight
• Enables measurement of low currents.
• Simple protection function for excessive input
Names of Parts
4
13
5
6
2
7
T
o circuit
under test
Current direction mark
“UNLOCK” indicator Sensor To digital
oscilloscope
input
Cable
A description of each part is given on the following page.

2IM 701928-01E
Description of Parts
1. Open/Close Lever
This lever opens and closes the sensor head. Always use this lever when
opening and closing the sensor head.
2. Sensor Head
The sensor head clamp is positioned around the conductor under test to
detect current. It is a precision-assembled component consisting of various
parts including plastic molded parts, a ferrite core, and a Hall element. Take
proper care when handling the probe to avoid damage as a result of sudden
sharp changes in ambient temperature, mechanical stress, or physical
shocks.
3. Demagnetization Switch (DEMAG)
This switch demagnetizes the core which can become magnetized when
turning the power ON or OFF, or when applying excessive input. You must
always use this switch prior to performing measurement. The time required
for demagnetization is approximately one second. During demagnetization, a
degaussing waveform is output.
4. Zero Adjust Trimmer
DLM series and other digital oscilloscopes utilize an automatic zero
adjustmentfunction.Normally,thezeroadjustmenttrimmerisnotusedforthe
adjustment.However,iftheresidualoffsetexceedstheautomaticadjustment
rangeandautomaticzeroadjustmentfails,youcanturnthetrimmertocarry
outthezeroadjustment.Thiscompensatesfortheeffectsoftheprobe’s
offset voltage, temperature drift, and other phenomena. Before performing
measurement,demagnetizetheprobethencarryoutzeroadjustment(see
page 4).
 • AdjustmentwiththeZeroAdjustTrimmer
 Youcanadjusttheoffsetvoltageusinganappropriatedriverasdescribed
below.Useadriverthatfitstheadjustmentgroove.Usingadriverwith
a large grip or a small head, or applying excessive force can result in
damagetotheadjustmentturnstoporgrooves.
 • ExampleDriverBitDimensions(Referencevalue)
Head thickness (W): 0.4 mm, head length (L): 1.8 mm (driver length:
10 mm or more), head shape: minus.
L
W
5. Probe Interface
The point of connection to the input of the digital oscilloscope. Outputs the
measured current waveform at a constant rate (0.1 V/A, in combination with
1MΩimpedance).TheoutputterminalisaBNCconnector.Connecttoa
digital oscilloscope that supports the YOKOGAWA probe interface.

3
IM 701928-01E
6. Interface Spring Pins
When the probe interface is connected, it touches the pad on the interface
board of the oscilloscope. The probe’s power and offset voltage are supplied
through this interface component. It also automatically recognizes the probe
type.
7. Latch Release Lever
Release the lock when connecting the probe interface to the oscilloscope
input.
Operating Procedures
Usage Precautions
WARNING
If the waveform measuring instrument to be connected to the output
terminal (BNC) of this probe has other measuring terminals, the probe’s
connection terminals and internal circuits may become hazardous live
depending on the types of devices that are connected to the instrument’s
measuring terminals.
To avoid this, note the following:
• Ensurethatbasicinsulationequivalenttothatofthecircuitundertest
in terms of measurement category, operational voltage, and pollution
degree is used between the measuring terminal to which the probe is
connected and other measuring terminals.
• Ifthebasicinsulationacrossmeasuringterminalsdoesnotmeetthis
requirement, do not apply an input exceeding the safety voltage level to
any of the other measuring terminals.
• Alwaysgroundthemeasuringinstrument.
• Takecaretoavoidelectricshockwheneverconnectingtheprobe
to a measuring terminal. Also, never disconnect the probe from the
measuring instrument while the probe is connected to the circuit under
test.
• Beforeconnectingtheprobetothecircuitundertest,confirmthatthe
measuring instrument is correctly grounded, and that the probe interface
is properly connected to the measuring instrument’s input.
• Makesuretoreadallsafetyprecautionsandwarningssuchas
information concerning electric shock for any instruments to which the
probe will be connected.
CAUTION
To clean the instrument, wipe using a soft cloth with a small amount of
water or mild detergent. Never use detergents that contain benzine,
alcohol, acetone, ethyl compounds, ketones, thinner, or gasoline as
deformation or discoloration can result.