Unit UT-P4000 Series User manual
www.uni-trend.com
DC/AC Current Probes
UT-P4000 Series
UT-P4030D 30A/ DC～100MHz
UT-P4150 150A/ DC～12MHz
UT-P4500 500A/ DC～5MHz
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Safety Notices
A CAUTION notice denotes a hazard. It calls attention to an operating procedure, practice, or the like
that, if not correctly performed or adhered to, could result in damage to the product or loss of important
data. Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and
met.
A WARNING notice denotes a hazard. It calls attention to an operating procedure, practice, or the like
that, if not correctly performed or adhered to, could result in personal injury or death. Do not proceed
beyond a WARNING notice until the indicated conditions are fully understood and met.
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Catalog
Safety Notices ........................................................................................................................................... 2
Catalog ...................................................................................................................................................... 3
1. Features and Applications ................................................................................................................ 4
2. Description of products .................................................................................................................... 5
3. Making Measurements..................................................................................................................... 6
4. Safe Probing ...................................................................................................................................... 7
5. Accessories Description .................................................................................................................. 10
6. Specification ................................................................................................................................... 10
6.1 Electrical characteristics ................................................................................................................ 10
6.2 Mechanical characteristic .............................................................................................................. 13
6.3 Environmental characteristic ........................................................................................................ 14
7. Operating Method .......................................................................................................................... 14
7.1 Preparation before testing ............................................................................................................ 15
7.2 Degaussing and Zero setting ......................................................................................................... 15
7.3 Measuring method ........................................................................................................................ 15
8. The method to deal with abnormal situation ................................................................................ 16
9. Q&A ................................................................................................................................................ 16
9.1 Does UT-P4000 series fit the oscilloscope of any brand? ............................................................. 16
9.2 Can UT-P4000 series product measure small current? ................................................................. 16
9.3 Anymore tips? ............................................................................................................................... 16
10. Packing list .................................................................................................................................. 17
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1. Features and Applications
The UT-P4000 series current probes are wide band width DC/AC active current probes, featuring high
bandwidth, fast and accurate capture the current wave, accuracy up to 1% and low circuit insertion loss. This
probe can be used with any oscilloscope having a high-impedance BNC input.
The key features include:
Highly accurate current measurements.
Wide bandwidth.
Accurate and easy current measurements.
DC/AC measuring capabilities.
Over-current protection with dual indicators (buzzer and LED).
High and low range selection.
Low current measurements.
Degaussing and automatic zero setting.
Digital set by panel soft push keystroke for a longer service life.
Applications
Switching and linear power design
LED lighting design
New energy resources
Frequency conversion household appliances
Experiment of electronic engineering
Semiconductor devices design
Inverters / transformer design
Electronic ballast design
Industrial control / consumer electronic design
Engine driven design
Power electronic and electrical drive experiment
Electric vehicle transportation design
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2. Description of products
UT-P4030D
UT-P4150、UT-P4500
1) Sensor Head
The core component to measure conductor current. The component contains a precise semi-conductor that
could be damaged by drastic change of environmental temperature, external pressure and shock. Please be
careful during measurement.
2) Opening lever
The operating lever used to open the sensor head. Pull the lever to open the sensor jaw, put in the cable
under test, and push the lever to lock the sensor head to measure the current.
3) BNC Output Connector
The standard BNC port that can be connected to oscilloscope of any brand by a standard BNC Coaxial
Cable.
4) Overload Indicator LED
If when the current under measured exceeds the limit current, the red LED will light up and the buzzer will
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sound an alarm.
5) Jaw on indicator
When the light is on, it means that the push rod is in the unlock state. Make sure that the jaw is in the lock
state during the measurement.
6) Degaussing and Zero Setting Indicator
After pressing the degaussing zero button, the indicator light will be green, and after degaussing, the
indicator light will be off. If degaussing setting succeeds, the buzzer will make two short beeps. If
degaussing setting failed, the buzzer will make an extension beep of about one second.
7) Range LED Indicator
The green LED indicates the selected range.
8) Degauss auto zero button
Frequent usage of the device will generate residual magnetic field. Please degauss and zero set before
measurement for better measurement precision. Press the degaussing and auto zero button to trigger the
process (should be around 5s).
9) Range selected button
Model Range Transfer ratio
UT-P4030D 30A 0.1V/A
5A 1V/A
UT-P4150 150A 0.01V/A
30A 0.1V/A
UT-P4500 500A 0.01V/A
75A 0.1V/A
10) Power supply socket
External power supply socket, standard with (12V/1A) adapter.
3. Making Measurements
Before using the probe, check that the system is safe and that the preparations described in Safe Probing.
Have a visual inspection of the current probe of high frequency UT-P4000 Series probes,
power supply, cable, and oscilloscope.
The output of the current probe is terminated internally. Use a high impedance input to the measuring
instrument. Be sure to set the input impedance to 1 MΩ before making measurements. Set the
oscilloscope’s input coupling to DC. With the oscilloscope input at ground, adjust the trace to the zero
position. Connect the probe’s output connector to the oscilloscope’s input connector.
Connect the power supply to probe and the power indicator will light. Select suitable Range you want
via the Range Key.
Ensure that the probe sensor is NOT clamped around any conductors. Slide the probe’s Opening Lever
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into the LOCKED position as shown in Figure. Confirm that the sensor head is properly closed.
Degaussing and Zero Setting
When the key is pressed, the probe will demagnetize the core and set the output to zero voltage if
it has been magnetized by switching the power on and off, or by an excessive input. Always carry out
demagnetizing and Zero Setting before measurement and without current in the clamp. The
demagnetizing and Zero Setting process takes about a few seconds. During demagnetizing and Zero
Setting, a demagnetizing waveform is output.
If degaussing and Zero Setting succeeds, the buzzer will make two short beeps. If degaussing and
Zero Setting failed, the buzzer will make a single sound, for one second.
Do not demagnetize while the conductor being measured is clamped. This could damage the
components of the circuit being measured. Also, check that the conductor being measured is not
clamped when supplying power to the current probe for the same reason. Demagnetized waveforms are
generated when switching on the supply.
Measurement
Press the opening lever to open the sensor head.
Align the sensor so that the probe’s current direction indication corresponds to the direction of
current flow through the conductor to be measured. Also, align the clamp so that the conductor is
in the center of the sensor aperture.
Press the opening lever on the sensor head until the UNLOCK indication disappears. Check that
the opening lever is firmly locked, and the sensor head securely closed.
4. Safe Probing
This device is designed to comply with Safety Standards and has been thoroughly tested for safety prior
to shipment. However, mishandling during use could result in injury or death, as well as damage to the
device. Be certain that you understand the instructions and precautions in the manual before use. We
disclaim any responsibility for accidents or injuries not resulting directly from device defects.
To avoid short circuits and potentially life-threatening hazards, follow these warnings and precautions:
Never attach the clamp to a circuit that operates over the maximum rated voltage to earth.
Please avoid clamping around bare conductors during measurement.
While clamping and measuring, do not touch the clamp in front of the barrier or the
conductor being measured.
Be careful to avoid damaging the insulation surface while taking measurements.
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Make sure that the waveform measuring equipment connected to this device's output
terminal (BNC) is equipped with a protective earthling with double-insulation
construction.
Do not allow the device to get wet, and do not take measurements with wet hands. This
may cause an electric shock.
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 part of a part.
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.
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 Separated Extra-Low Voltage
Earthed.
Read and observe all warnings and precautions relating to electrical safety for the
measuring instrument being connected to the probe.
To avoid damage to the device, protect it from vibration or shock during transport and
handling, and be especially careful to avoid dropping.
Do not store or use the device where it could be exposed to direct sunlight, high
temperature, humidity, or condensation. Under such conditions, the device may be
damaged and insulation may deteriorate so that it no longer meets specifications.
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
or CYBERTEK representative.
This device is not designed to be entirely water- or dust- proof. To avoid damage, do not
use it in a wet or dusty environment.
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 precision ground, and should be treated with
care. If these surfaces are scratched, performance may be impaired.
Foreign substances such as dust on the contact surfaces of the sensor head can cause
acoustic resonance and degrade measurement, so it should be cleaned by gently wiping
with a soft cloth.
To avoid damaging the sensor cable and power supply cable, do not bend or pull the
cables.
When the power is on, keep closed, except when clamping them onto the conductor to be
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measured. The facing surface of the core section can be scratched while it is open.
Do not place any un-clamped conductor with an electric current of a frequency of 10 kHz
or more near the sensor head. Current flowing in the conductor nearby may heat up the
sensor head and cause its temperature to rise, leading to damage to the sensor. For
example, when one side of a go-and-return conductor is clamped and the other side is also
placed near the sensor head , even if the electric current is lower than the consecutive
maximum current, electric currents in both sides will heat up the wires and raise the
temperature, thereby causing damage to the sensor.
The maximum continuous input range is based on heat that is internally generated during
measurement. Never input current in excess of this level. Exceeding the rated level may
result in damage to the probe.
The maximum continuous input range varies according to the frequency of the current
being measured.
If excess current is input, generated heat activates a built-in safety function that blocks
normal output. If this happens, remove the input immediately (remove the sensor from the
conductor being measured or reduce the input current to zero). Wait until the sensor has
had sufficient time to cool before resuming operation.
Even if the input current does not exceed the rated continuous maximum, continuous input
for an extended period of time may result in activation of the safety circuit to prevent
damage resulting from heating of the sensor.
At high ambient temperatures, the built-in safety circuit may activate at current input
levels below the rated continuous maximum.
Continuous input of current exceeding the rated maximum or repeated activation of the
safety function may result in damage to the unit.
The probe is rated for maximum input under two conditions in addition to the input
maximums shown in the Specifications. These are (1) 30A peak for non-continuous input
and (2) 50A peak for pulse widths 10 µs.
(1) indicates an upper waveform response limit of 30A peak. Use the sensor at RMS
current input levels that are within the rated continuous maximums.
(2) Indicates the upper response limit for a single input pulse.
When opening the sensor head of the probe, be sure to operate with the opening lever. If
an upper core is forced to open when the sensor head is locked, the open close mechanism
can be damaged.
The output of this unit is terminated internally. Use an oscilloscope with an input
impedance of at least 1 MΩ.
Immediately after powering on the probe, the probe may be subject to an appreciable
offset drift due to the effect of self heating. To counteract this, allow the probe to warm up
for about 30 minutes before carrying out measurement.
When performing continuous measurements, it is necessary to be aware that the offset
voltage drifts, depending on factors such as the ambient temperature.
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Under certain circumstances, oscillation may occur if the probe is connected to the power
supply while the power supply is on. This does not indicate a malfunction. Oscillation can
be stopped and operation restored to normal by opening and closing the sensor head.
Depending on the measured current frequency, some sound maybe produced by resonance,
but has no effect on measurements.
The reading may be affected by the position within the clamp aperture of the conductor
being measured. The conductor should be in the center of the clamp aperture.
When carrying out a measurement, press the opening lever until the UNLOCK indication
disappears and check that the sensor head is properly closed. If the sensor head is not
properly closed, an accurate measurement is not possible.
Accurate measurement may be impossible in locations subject to strong external magnetic
fields, such as transformers and high-current conductors, or in locations subject to strong
external electric fields, such as radio transmission equipment.
At high frequencies, common mode noise may affect measurements taken on the high
voltage side of circuits. If this occurs, reduce the frequency range of the waveform
measuring instrument or clamp onto the low-voltage side of the circuit.
5. Accessories Description
BNC Cable: 100cm, MALE X MALE
Power Adapter (12V/1A)
6. Specification
6.1 Electrical characteristics
Model UT-P4030D UT-P4150 UT-P4500
Bandwidth(-3dB) DC-100MHz
(Figure1)
DC-12MHz
(Figure4)
DC-5MHz
(Figure7)
This manual suits for next models
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