GW Instek GCP-206P User manual

Current Probe and Power Supply
USER MANUAL
GW INSTEK PART NO. 82CP-425P0M01
ISO-9001 CERTIFIED MANUFACTURER

November 2010 edition
This manual contains proprietary information, which is protected by
copyright. All rights are reserved. No part of this manual may be
photocopied, reproduced or translated to another language without
prior written consent of Good Will Corporation.
The information in this manual was correct at the time of printing.
However, Good Will continues to improve its products and therefore
reserves the right to change the specifications, equipment, and
maintenance procedures at any time without notice.
Good Will Instrument Co., Ltd.
No. 7-1, Jhongsing Rd., Tucheng City, Taipei County 236, Taiwan.

TABLE OF CONTENTS
3
Table of Contents
SAFETY INSTRUCTIONS.................................. 5
Safety Symbols .......................................................................5
PRECAUTIONS................................................. 7
Preliminary Check ...............................................................7
OVERVIEW ..................................................... 13
Current Proble Overview ...................................................13
Features ............................................................................13
Names of Parts(Current Probe) .........................................14
External view.........................................................................14
Parts of the Sensor............................................................15
Names of Parts(Power supply) ..........................................17
MEASURE PROCEDURE ....................................................20
Preparations for Measurement (Current Probe).................20
Demagnetizing and Zero Adjustment ...................................22
Measurement Procedure (Current Probe) ..........................24
Preparations (Power supply) .............................................30
Measurement Procedure (Power supply) ...........................31
APPENDIX...................................................... 32
Fuse Replacement (for GCP-206P only) .............................32
Change the power supply voltage setting ..........................34
Current Probe Specifications .............................................35
Model-specific specifications...............................................35
Common specifications (for GCP-530 and GCP-1030).......36
Power Supply Specifications..............................................39
Model-specific specifications...............................................39
Common specifications (for GCP-206P and GCP-425P).....40

TABLE OF CONTENTS
4

SAFETY INSTRUCTIONS
5
SAFETY INSTRUCTIONS
Safety Symbols
This manual contains information and warnings essential for safe
operation of the device and for maintaining it in safe operating
condition. Before using the device, be sure to carefully read the
following safety notes.
The symbol printed on the device indicates that
the user should refer to a corresponding topic in the
manual (marked with the symbol) before using
the relevant function.
In the manual, the symbol indicates particularly
important information that the user should read
before using the device.
Indicates that application around or removal from
live lines is only permitted on condition that the
lines are insulated.
Indicates a grounding terminal
Indicates AC (Alternating Current)
Indicates the ON side of the power switch.
Indicates the OFF side of the power switch.
Indicates a fuse.

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The following symbols in this manual indicate the relative
importance of cautions and warnings.
DANGER Indicates that incorrect operation presents an
extreme hazard that could result in serious injury or
death to the user.
WARNING Indicates that incorrect operation presents a
significant hazard that could result in serious injury
or death to the user.
CAUTION Indicates that incorrect operation presents a
possibility of injury to the user or damage to the
device.
NOTE Indicates advisory items related to performance or
correct operation of the device.
(Measurement categories) EN 61010-1:2001 specifies the
measurement categories and their requirements as follows. The
device falls under category I.
•Measurement category IV is for measurement performed at the
source of a low-voltage installation.
•Measurement category III is for measurement performed in a
building installation.
•Measurement category II is for measurement performed on
circuits directly connected to a low voltage installation.
•Measurement category I is for measurements performed on
circuits not directly connected to Mains.

PRECAUTIONS
7
PRECAUTIONS
Follow these precautions to ensure safe operation
and to obtain the full benefits of the various
functions.
Preliminary Check
Before using the device the first time, verify that it operates normally
to ensure that the no damage occurred during storage or shipping. If
you find any damage, contact your dealer.
DANGER
•To avoid short circuits and potentially life-
threatening hazards, never attach the GCP-530 or
GCP-1030 to a circuit that operates at more than
300V, or over bare conductors.
•When conductors being measured carry in excess
of the safe voltage level (SELV-E) and not more
than 300 V, to prevent short circuits and electric
shock while the core section is open, make sure
that conductors to be measured are insulated with
material conforming to
(1) Measurement CategoryⅠ,
(2) Basic Insulation Requirements for Working
Voltages of 300 V, and
(3) Pollution Degree 2.
For safeties sake, never use this sensor on bare
conductors. The core and shield case are not
insulated.

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8
Un-insulated
(core and
shield case)
•Be careful to avoid damaging the insulation
surface while taking measurements.
•This instrument is made for use with the GCP-
206P or GCP-425P POWER SUPPLY. It is possible
to use a power supply other than the GCP-206P or
GCP-425P, provided that the connector and pin
assignments match, and that voltage and other
electrical specifications are satisfied. In the interest
of safety, make sure that the power supply has a
protective earthing with double- insulation
construction.
•Make sure that the waveform measuring
equipment connected to this device's output
terminal (BNC) is equipped with a protective
earthing with double-insulation construction.
•If the waveform measuring instrument being
connected to the output terminal (BNC) on this
device is equipped with any other measurement
terminals, take the following precautions to ensure
that the other instrument does not form a bridge
between the probe and any hazardous live of a
part.
1. Isolate the terminal to which the probe is
connected from other terminals on the measuring
instrument using basic insulation conforming to
the measurement category, working voltage, and
pollution degree requirements of the circuit being
tested.

PRECAUTIONS
9
2. If basic insulation requirements cannot be met
between the terminal to which this device is
connected and other terminals of the measuring
instrument, make sure that the voltage input to
the measurement terminal does not exceed the
safe voltage level (SELV- E).
3. Read and observe all warnings and precautions
relating to electrical safety for the measuring
instrument being connected to the probe.
Refer to the following standards regarding the
meanings of underlined terms.
IEC61010-1
IEC61010-031
IEC61010-2-032
•Be sure to observe all operating precautions for the
waveform monitoring instrument (oscilloscope or
recorder) and other measurement instruments to
which this device is connected.
•When using a measurement instrument that does
not provide isolation between its input terminals
and chassis or other input terminals, please pay
attention to the following points. If a signal is
applied to an input terminal other than that to
which this device is connected, do not connect the
ground-side terminal to any non-ground potential.
Otherwise, short-circuit current will flow through
the GCP-206P or GCP-425P or this device from the
ground terminal, which could cause an electrical
accident or damage.

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10
WARNING
•Do not allow the device to get wet, and do not take
measurements with wet hands. This may cause an
electric shock.
•To avoid electric shock when measuring live lines,
wear appropriate protective gear, such as insulated
rubber gloves, boots and a safety helmet.
CAUTION
•To avoid damage to the device, protect it from
physical shock when transporting and handling.
Be especially careful to avoid physical shock from
dropping.
•This device should be installed and operated
indoors only, between 0 and 40°C (32 to 104°F) and
80% RH or less.
•Do not store or use the device where it could be
exposed to direct sunlight, high temperature or
humidity, or condensation. Under such conditions,
the device may be damaged and insulation may
deteriorate so that it no longer meets
specifications.
•This device is not designed to be entirely
waterproof or dustproof. To avoid damage, do not
use it in a wet or dusty environment.

PRECAUTIONS
11
•The sensor head is a precision assembly including
a molded component, a ferrite core, and a Hall
effect element. It may be damaged if subjected to
sudden changes in ambient temperature, or
mechanical strain or shock, and therefore great
care should be exercised in handling it.
•The matching surfaces of the sensor head are
precisely ground, and should be treated with care.
If these surfaces are scratched, performance may
be impaired.
•To avoid damaging the sensor cables, do not bend
or pull the sensor cable and power supply cable.
•To clean the device, wipe it gently with a soft cloth
moistened with water or mild detergent. Never
use solvents such as benzene, alcohol, acetone,
ether, ketones, thinners or gasoline, as they can
deform and discolor the case.
•When the power is on, keep the core section of the
sensor closed, except when clamping them onto
the conductor to be measured. The facing surface
of the core section can be scratched while it is
open.
•Keep the clamp jaws and core slits free from
foreign objects, which could interfere with
clamping action.
•Keep the sensor head closed when not in use, to
avoid accumulating dust or dirt on the mating core
surfaces, which could interfere with clamp
performance.
•Avoid stepping on or pinching the cable, which
could damage the cable insulation.
•Keep the cables well away from heat sources, as
bare conductors could be exposed if the insulation
melts.

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NOTE
•Correct measurement may be impossible in the
presence of strong magnetic fields, such as near
transformers and high-current conductors, or in
the presence of strong electromagnetic fields such
as near radio transmitters.
•When sending the device for repair, carefully to
prevent damage in transit. Include cushioning
material so the instrument cannot move within the
package. Be sure to include details of the problem.

OVERVIEW
13
OVERVIEW
Current Proble Overview
This device can be directly connected to a BNC input connector of a
waveform measuring instrument such as an oscilloscope or recorder,
and by clamping on a conductor to be measured, allows the current
waveform to be easily captured.
Features
•Highly accurate current detection
•Easy current measurement
•Broadband frequency characteristics DC to 50 MHz(for GCP-530)
•Broadband frequency characteristics DC to 100 MHz(for GCP-1030)
•Compact and permits measurement of low current levels
•Easy protect function at excessive input

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14
Names of Parts(Current Probe)
External view

OVERVIEW
15
Parts of the Sensor
XOpening lever
Operating lever for opening the sensor head.
Always use this lever to open the sensor head.
YSensor head This clamps the conductor being measured, and
carries out the actual current measurement. It is a
precision assembly including a molded
component, a ferrite core, and a Hall effect
element. It may be damaged if subjected to
sudden changes in ambient temperature, or
mechanical strain or shock, and therefore great
care should be exercised in handling it.
ZDemagnetizing
switch
(DEMAG)
This demagnetizes the core if it has been
magnetized by switching the power on and off, or
by an excessive input. Always carry out
demagnetizing before measurement. The
demagnetizing process takes about one second.
During demagnetizing, a demagnetizing
waveform is output.
[Zero
adjustment
dial (ZERO
ADJ)
Use the zero adjustment dial to correct for the
effect of a voltage offset or temperature drift on
the device. When beginning measurement, after
demagnetizing always carry out zero adjustment.
\Coarse
adjustment
trimmer
Use this only when adjustment is not possible
within the range of the zero adjustment dial.Use a
nonconductive screwdriver (e.g. ceramic driver)
for adjustment.
]Output
connector
The current waveform of the measured conductor
is output at a constant rate (0.1 V/A).
Connect to the BNC input connector of the
waveform measuring instrument.
^Power plug Connect this to the GCP-206P or GCP-425P
POWER SUPPLY receptacle to supply power to
the sensor terminator.

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DANGER To avoid electric shock, do not touch the portion
beyond the protective barrier during use.
NOTE
•The output of this device is terminated
internally. Use a high-impedance input to the
measuring instrument. With an input
impedance of 50Ω, accurate measurement is not
possible.
•If using BNC-banana plug adapters or similar to
connect to input terminals other than BNC
connectors, make sure the polarity is correct.
•Turn the collar until it clicks, and check that it is
locked securely.

OVERVIEW
17
Names of Parts(Power supply)
Front view
Power
indicator
Power
supply
receptacles
Power
indicator
Power
supply
receptacles
GCP-425P
Rear View
GCP-425P

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Front view
GCP-206P
Rear View
GCP-206P

OVERVIEW
19
Power Supply
Receptacle

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20
MEASURE PROCEDURE
Preparations for Measurement (Current
Probe)
Procedure 1. Have the GCP-206P or GCP-425P POWER
SUPPLY, and oscilloscope or recorder for
waveform measurement ready.
CAUTION Before turning on the power, make sure that the
voltage of the power supply being used matches the
supply voltage indicated on the rear panel of the
GCP-206P or GCP-425P
NOTE The output of this device is terminated internally.
Use a high-impedance input to the measuring
instrument. With an input impedance of 50Ω,
accurate measurement is not possible.
2. Turn the power switch off and connect the
power cord.
3. Connect the power plug of the GCP-530 or GCP-
1030 to the power receptacle of the GCP-206P or
GCP-425P.