Shenzhen CTB20A User manual

Shenzhen Zhiyong Electronics Co., Ltd.
www.cybertek.cn
AC/DC High Accuracy Current Probe
CTB20A (20A/1MHz)
CTB200A (200A/500kHz)
CTB500A (500A/100kHz)
CTB1000A (1000A/20kHz)
Shenzhen Zhiyong Electronics Co., Ltd.
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Preface
First of all, thank you for purchasing our products, this instruction manual is the
description about the function, usage, operation attention points, etc. Before use, please
read the instructions carefully and use correctly.
Manual annotation will use the following symbols to distinguish.
To the safely use the machine, you must abide by the following safety precautions strictly.
The violation against the manual is likely to damage the protective function of the
machine. In addition, the company is not responsible for any safety problem caused by the
violation of matters needing attention in operation.

Please avoid direct contact with the naked conductor, or there will be shortage or shock accident.

Please measure on the insulated wire that has proper insulation from the circuit voltage.

Shock accident will possibly occur if the device or the user’s hand is wet, please watch out.

The maximum measurable current will change according to the frequency. As the treatment to lower
the rated value, maximum continuous measurable current will be limited. Please do not measure the
current with lower amplitude surpassing rated value. The malfunction caused by sensor heating will
possibly cause fire accident and burn.
Warn
Notice
Warn
In the case of wrong operation, the user risk injury. The content under this
mark records the relevant matters needing attention to avoid such dangers.
The user may suffer minor injuries and material damage with the wrong
operation. To avoid such situation, the matters under this mark need attention.
This symbol means it is harmful to the machine and human body; you must
strictly follow the instruction manual to operate.
Note
This symbolizes important note about how to use the machine.
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 Do not use the top part of the clamp to fix the foreign matter. This could possibly lower the
performance of the sensor characteristics or malfunction the switch.
 Do not input current to the device when the power supply is cut off, or the device will possibly be
damaged.
 Please do not step on or clamp on the wire to protect its skin.
 Do not touch the core part when the clamp is opened. Static electricity on the core could possibly
damage the device.
 Please remain the clamp close in spare time. The dust on the clamp contact surface could case the
measurement error.
 Please undo the lock before pulling out the input connector, or the connector will be damage by force.
 The cable will be hardened in the environment below 0℃. The cable skin or even cable itself will be
damaged if cable is forced to bow or pulled.
 Please avoid vibration or impact when the device is in operation or transportation, especially the falling
impact.
 Please avoid the operation under sunny, thermal, damp and humid environment. Deformation and
worsen insulation will ruin the operation specification.
 Please check the device before usage to make sure the device is not malfunctioned caused by storage
and transportation. Please contact the commission agent or operator nearby when malfunction is
observed.
 The device is not designed neither waterproof nor dust-proof. Do not use the device under dusty and
complex chemical environment.
 Do not use the device in the strong EM wave environment or close to the electrified object.
 Do not use the device near any sort of induction heating device. (e.g. Induction cooker)
Warn
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Index
Preface………………………………………………………………………………………………….……1
Summary……………………………………………………………………………………………….……4
Application……………………………………………………………………………………………….……4
Product Description……………………………………………………………………………………….…4
Option Device………………………………………………………………………………………….…5
Product Electronic Specification…………………………………………………………………….……5
Machinery Specification……………………………………………………………………………..……..…9
Environment Characteristics…………………………………………………………………….…….…......9
Operating Methods…………………………………………………………………………….…….……..…9
Note During Operation………………………………………………………………. ….…………..…….9
Measurement Steps……………………………………………………………………………….....…….10
Packing List………………………………………………………………………………….……….….…11
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1. Summary
CTB series current probe is a kind of current probe which can measure DC and AC at the same time. It
is a clamp type current sensor which can be opened / closed for AC / DC current measure. Its characteristics
include: high precision, typical value 0.3%; good frequency and temperature characteristics; high bandwidth.
CTBxxxB series is powered by 12V adaptor, while CTBxxxA need to cooperate with CTB104 (Four
channel sensor unit) in operation. With the power analyzer, it can realize power analyze in the high accuracy
current measurement.
2. Application

Power supply (Switch type and linear type) design
 Neo energy, electric vehicle design

Variable frequency household appliance
 Electric industrial experiment

Inverter/transformer design
 Electronic Ballast

Industrial/consumer electronics design
 Engine drive design

Power electronics and electrical drive experiment
 Traffic transport system (Electric mobile, locomotive, avionic device) design
3. Product Description
Take CTB500A/1000A as example:
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1Jaw:CTB20A/CTB200A diameter 20mm,CTB500A/CTB1000A diameter 50mm.
2Power indicator: lighted green indicates power on.
3Degaussing indicator: lighted red when degaussing button was pressed. After the degaussing, indicator
will be off.
4Auto degaussing button: After frequent usages, the residual field on the probe will influence the
accuracy of the device. Press the button to degauss before the next measurement to improve the
performance.
5Offset adjust button(increase): press to increase offset. Pressing over 2s will continuously increase the
output offset.
6Offset adjust button(decrease): press to decrease offset. Pressing over 2s will continuously decrease
the output offset.
7Output connecting port: Probe output port. Connecting with the outlet of sensor unit CTB104.
8Current direction mark: Current direction should be the same as the mark, or the output will be
negative.
9Open/Close handle: Control the jaw through this handle
10 Lock push rod: Control the lock and unlock of the jaw.
4. Optional Device
CTB104 sensor unit: the sensor unit for the probe. 4 channels for 4 current probes at same time,
including probe connector, BNC output port, degaussing button and power
supply indicator.
5. Product Electronic Specification
f.s. Maximum display value or scale length (symbolizing the rated primary current range)
rdg. Reading value (symbolizing the current value under measurement, or the current value indicated
by the measurement devices)
Proceed measurement under condition of sin wave input, central conductor position and powered by
CTB104.
Measuring device of input resistance over 1MΩ
Please correctly degauss zero set before the measurement.
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CTB20A
CTB200A
CTB500A
CTB1000A
Rated current
AC/DC 20A
AC/DC 200A
AC/DC 500A
AC/DC 1000A
Bandwidth
1MHz
500kHz
100kHz
20kHz
Current transfer ratio
100mV/A
10mV/A
4mV/A
2mV/A
Maximum input
current
Refer to the Current rated value vs. Frequency curve
Accuracy
Refer to the Accuracy List
Operating temperature
and humidity range
-40℃~85℃, Below 80%RH (No dew)
Promised accuracy
range
0℃~40℃, Below 80%RH
Temperature drift
coefficient
-40℃~0℃﹑40℃~85℃
Amplitude Sensitivity: Below±0.02% rdg./℃
Offset Voltage:≤±0.01% f.s./℃
Diameter of
measurable conductor
Φ Below 20 mm
Φ Below 50 mm
Conductor position
effect
Below ±0.1% rdg.
(Input 20A,
DC-100Hz, outer
diameter 5mm)
Below ±0.1% rdg.
(Input 100A,
DC-100Hz, outer
diameter 5mm)
Below ±0.2% rdg.
(Input 100A,
DC-100Hz, outer
diameter 10mm)
Below ±0.2% rdg.
(Input 1000A,
50Hz/60Hz, outer
diameter 30mm)
Power supply voltage
±12V
Power supply capacity
Below ±200mA
(20A/45Hz
measurement,
power supply
±12V)
Below ±250mA
(200A/45Hz
measurement,
power supply
±12V)
Below ±300mA
(500A/45Hz
measurement,
power supply
±12V)
Below ±300mA
(1000A/45Hz
measurement,
power supply
±12V)
CTB20A Accuracy List
Frequency
Amplitude
Phase
DC
±0.3% rdg. ±0.05% f.s.
-
DC < f ≤ 100 Hz
±0.3% rdg. ±0.01% f.s.
±0.1deg.
100Hz< f ≤ 500 Hz
±0.3% rdg. ±0.02% f.s.
±0.2deg.
500Hz< f ≤ 1kHz
±0.5% rdg. ±0.02% f.s.
±0.5deg.
1kHz< f ≤ 5kHz
±1.0% rdg. ±0.02% f.s.
±1.0deg.
5kHz< f ≤ 10kHz
±1.5% rdg. ±0.02% f.s.
±1.5deg.
10kHz< f ≤ 50kHz
±2.0% rdg. ±0.02% f.s.
±(0.5+0.1×f
kHz)deg.
50kHz< f ≤ 100kHz
±5.0% rdg. ±0.05% f.s.
100kHz< f ≤ 300kHz
±10% rdg. ±0.05% f.s.
300kHz< f ≤ 500kHz
±15% rdg. ±0.05% f.s.
-
500kHz< f ≤ 1MHz
±30% rdg. ±0.05% f.s.
-
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CTB200A Accuracy List
Frequency
Amplitude
Phase
DC
±0.3% rdg. ±0.02% f.s.
-
DC < f ≤ 100 Hz
±0.3% rdg. ±0.01% f.s.
±0.1deg.
100Hz< f ≤ 500 Hz
±0.3% rdg. ±0.02% f.s.
±0.2deg.
500Hz< f ≤ 1kHz
±0.5% rdg. ±0.02% f.s.
±0.5deg.
1kHz< f ≤ 5kHz
±1.0% rdg. ±0.02% f.s.
±1.0deg.
5kHz< f ≤ 10kHz
±1.5% rdg. ±0.02% f.s.
±1.5deg.
10kHz< f ≤ 50kHz
±5.0% rdg. ±0.02% f.s.
±(0.5+0.1×f
kHz)deg.
50kHz< f ≤ 100kHz
±15% rdg. ±0.05% f.s.
100kHz< f ≤ 300kHz
±15% rdg. ±0.05% f.s.
300kHz< f ≤ 500kHz
±30% rdg. ±0.05% f.s.
-
CTB500A Accuracy List
Frequency
Amplitude
Phase
DC
±0.3% rdg. ±0.02% f.s.
-
DC < f ≤ 100 Hz
±0.3% rdg. ±0.01% f.s.
±0.1deg.
100Hz< f ≤ 500 Hz
±0.3% rdg. ±0.02% f.s.
±0.2deg.
500Hz< f ≤ 1kHz
±0.5% rdg. ±0.02% f.s.
±0.5deg.
1kHz< f ≤ 5kHz
±1% rdg. ±0.02% f.s.
±1.5deg.
5kHz< f ≤ 10kHz
±1.5% rdg. ±0.02% f.s.
±2.0deg.
10kHz< f ≤ 20kHz
±5% rdg. ±0.02% f.s.
±(0.2×f kHz)deg.
20kHz< f ≤ 50kHz
±10% rdg. ±0.05% f.s.
50kHz< f ≤ 100kHz
±30% rdg. ±0.05% f.s.
CTB1000A Accuracy List
Frequency
Amplitude
Phase
DC
±0.3% rdg. ±0.02% f.s.
-
DC < f ≤ 100 Hz
±0.3% rdg. ±0.01% f.s.
±0.1deg.
100Hz< f ≤ 500 Hz
±0.5% rdg. ±0.02% f.s.
±0.2deg.
500Hz< f ≤ 1kHz
±1% rdg. ±0.02% f.s.
±0.5deg.
1kHz< f ≤ 5kHz
±2% rdg. ±0.02% f.s.
±1.5deg.
5kHz< f ≤ 10kHz
±5% rdg. ±0.05% f.s.
±2.0deg.
10kHz< f ≤ 20kHz
±30% rdg. ±0.1% f.s.
±10.0deg.
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CTB20A
Current rated value vs. Frequency curve
TA: ambient temperature
CTB200A
Current rated value vs. Frequency curve
TA: ambient temperature
CTB500A
Current rated value vs. Frequency curve
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CTB1000A
Current rated value vs. Frequency curve
6. Machinery Specification
CTB20A
CTB200A
CTB500A
CTB1000A
Jaw diameter
20mm
50mm
Connecting cable length
3m
Current clamp handle
dimension（L*W*H）
162*80*31mm
246*116*35mm
Probe weight
385g
750g
880g
7. Environment Characteristics
Operation environment
Indoor, pollution level 2
Operation temperature and humidity
-40℃~85℃,below 80% RH(no dew)
Storage temperature and humidity
-40℃~85℃,below 80% RH(no dew)
Operation altitude
2000m
Storage altitude
12000m
8. Operation Methods
Note During Operation
 The device should cooperate with the specialized sensor unit CTB104 in measurement. Please select
the high input resistance (1MΩ) when output to the oscilloscope. If the input resistance is 50Ω, the
measurement will be error.

Make sure the current under test is below the maximum value. The magnetic core will be saturated if
rated value is surpassed. As the result the waveform generated will be partially cut off and the surge
current will cause failure on core degaussing process, need to be adjust again to zero set.
 If there’s high magnetic field (e.g. transformer, large circuit) or strong current (e.g. wireless) near the
probe, measurement may not proceed normally
Note
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 The frequency of the current under test will generate resonance. This will not influence the result.

The position of the conductor under test within the sensor head will influence the result. Please adjust
the conductor to the central position of the sensor head.

Push the lock control rod till “unlock” symbol disappear during the testing.
 If the high potential side of the circuit is inserted in the high frequency field, the result will possibly be
influenced by the noise. Please limit the frequency band of the waveform observer when necessary or
inset the low potential side.

Do not try to degauss zero set or adjust offset during current input states.
 The offset output of the probe will be influence by the environment (geomagnetism, magnetic field
generator) and temperature. Please proceed the degaussing under actual environment.
 The offset can be caused by the impact on probe.

Please close the jaw before degauss the probe.
 To improve the sensitivity of the system, twine the conductor on jaw when measuring the DC or
current below 1kHz. 10 turns will output signal of 10 times strong.
 The high potential side of the clamping circuit in high frequency range can be influenced by the public
mode noise. Please clamp on the low potential side according to your need.
 Since the probe applies flux gate theory, harmonic noise of around 1.6MHz is expected during output.

When measuring high frequency large current about 1kHz, the position of the conductor will cause the
increase of error and distortion of waveform. Please set the conductor in the central position. For those
conductors not under test with high frequency large current about 500A or 1kHz, please set them away
from the jaw, or the measurement error and waveform distortion is likely to occur.

Please unlock and pull out the connector before remove the output port. Output terminal will be
damage if locked wire is pulled by force

Continuous maximum input range is the fixed value defined by the device heat. Do not apply the
current over the range or the device will be damaged.

The continuous maximum input range will change according to the frequency of current under
test. The probe will be burned if current surpassing maximum is continuously applied.

The heating of the sensor under continuous current surpassing maximum input range will cause
improper output. Please cut off the input current and wait for the full cool down before the next
attempt.
Measurement Steps
 Connect the current probe to the sensor unit CTB104

Connect the sensor unit output port to the terminal such as oscilloscope and power analyzer
through BNC wire.

Turn on CTB104 sensor unit
Warn
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 Executing degaussing. Proceed by the button on probe or sensor unit.

Unlock the jaw through lock push rod.
 Open the jaw using on/off handle

Clamp on the wire under test according to the current direction (Or the signal output will be
reversed) and close the jaw.
 Close the jaw using lock push rod.
 Start measurement

Remove the device from the conductor after measurement is over.
 Cut off the sensor unit power supply

Remove the probe from sensor unit.
9. Packing List
Packing List
Name
Amount
Current Probe
1
Instruction Manual
1
Warranty Card
1
Test Report
1
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SHENZHEN ZHIYONG ELECTRONICS CO., LTD.
Addr：Room A1702, Building 4, TianAn Cyber Park, HuangGe North Road, LongGang
District, ShenZhen City, China
Tel: [phone]
[phone]
Q Q: 400 852 0005
Fax: [phone]
Email: [e-mail] © Zhiyong Electronics, 2023
URL: http://www.cybertek.cn Published in China, May 1, 2023
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