Unit UT-P4100A User manual

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Low Frequency ACDC Current Probe
UT-P4100A (100A/600kHz)
UT-P4100B (100A/2MHz)

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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 avoid short out and deadly accident, the circuit under test should not surpass 600VAC
 This probe is not designed for naked conductor.
 Do not touch the conductor under test and the transducer probe during measuring.
 When the oscilloscope is connected to other test terminal, please be careful for these points:
 Please use the fundamental insulation equipment with fitful voltage range and pollution rate
while the probe’s test terminal is connected to the other terminals.
 Please do not surpass the safe voltage range if the fundamental insulation of the test terminal
cannot be met.
 Please operate under correct guidance about electric safety.
 There could be deadly electric shock if the device is damp or the users’ hand is wet.
该符号表示对人体和机器有危害，必须参照说明书操作。
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.
Warning
Warning
Attention

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 The probe consists of precision components such as Magnetic core and Hall sensor, which could be
possibly damaged because of the sudden temperature change or external force impact. Please be
careful for vibration or impact.
 The product is neither waterproof nor dustproof; please do not operate in the environment filled
with dust and water.
 The probe’s upper and lower contact surfaces is made by precise polishing process. Please protect
this part or the probe could be malfunction.
 When the battery voltage is lower than 6.5V, the probe will indicate a low voltage alert, please
change the battery. You can use a 9V alkaline battery for longer time.
UT-P4100A/B Brief Summary
Type Max current
(DC+Pk)
Max RMS
value
Band width
(-3dB) Range Current transfer ratio
UT-P4100A 100A 70.7 Arms 600kHz
100A 0.01V/A
10A 0.1V/A
UT-P4100B 100A 70.7 Arms 2MHz
100A 0.01V/A
10A 0.1V/A
Note
Attention

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Catalog
UT-P4100A/B Brief Summary .......................................................................... 3
Catalog ............................................................................................................... 4
1. Summary ...................................................................................................... 5
2. Introduction about probes and accessories .................................................. 5
3. Electronic Characteristics ............................................................................ 7
4. Operating instruction ................................................................................... 9
5. Mechanic Characteristics ........................................................................... 10
6. Environment characteristics ...................................................................... 10
7. Maintenance ............................................................................................... 11
8. Troubleshoot .............................................................................................. 11
9. Packing List ............................................................................................... 12

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1. Summary
UT-P4100A/B is a kind of current probe that can measure both DC and AC current up to 100A
(70.7Arms). The band width of UT-P4100A is 600 kHz (-3dB), and the band width of UT-P4100B is
2MHz (-3dB).UT-P4100 series provide two range option of 10A and 100A, the users may choose the
correct range according to the current value. The auto zero function make it easy for the users to operate,
and it also has power and low voltage indicator as well as overload sound alert. The probe can be
powered by battery or external power supply, which makes the measurement a lot more convenient. With
standard BNC output port, the probe can connect to any oscilloscope, and it can also connect to
multimeter with BNC-banana plug. The UT-P4100 series is usually used in power supply, motor drive
and power supply.
2. Introduction about probes and accessories
 Probe

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 Power Switch:
ON: Power on and probe work;
OFF: Power off and probe do not work.
 Power indicator: When the power switch is on, the indicator is lighted green.
 Battery Low Voltage Indicator: when the voltage of the battery is lower than 6.5V, the power
indicator will light red, reminding the users to change battery.
 Range Switch: press the button switch to change between H and L Range.
 Range Indicator: indicating the current Range choice. H level: 100A; L level: 10A.
 Auto Zero button: to make accurate measurement, users need to do zero degaussing before
measuring to avoid the influence of environment factors like earth magnetic field and temperature
shift.
 Auto Zero Indicator: when Auto Zero, the indicator is lighted on and in green and will be turned off
when the Auto Zero is finished.
 Clamp: the clamp used for current measurement; the max diameter for the cable is 12mm.
 External Power Supply Plug: powered by external DC supply.
 Battery Box: standard 9V alkaline battery is used. Please turn off the switch and disconnect from
the conductor under test & oscilloscope when changing battery.
 Accessories
Output Cable: 1 meter
Power Supply Adaptor：DC12V/1.2A

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3. Electronic Characteristics
Test Condition: 23℃, 60%RH, cable under test get through the test center, load resistance
1MΩ
Range level L H
Current range 50mA~10A Peak 1A~100A Peak
Attenuation accuracy 0.1V/A 0.01V/A
Typical DC precision 3%±50mA 500mA~40A Peak：4%±50mA；
40A~100A Peak：±15% Maximum
Band-width
(-3dB)
UT-P4100A DC-600kHz Refer to the typical Amplitude frequency
characteristic (Figure 1)
UT-P4100B DC-2MHz Refer to the typical Amplitude frequency
characteristic (Figure 2)
Max current VS frequency
characteristics curve Figure 3
Phase shift DC～65Hz：<1.5° DC～65Hz：<1°
Typical DC linearity The typical DC linearity at H level(0.01V/A), Figure 4
Rise time
UT-P4100A ≤583ns
UT-P4100B ≤175ns
Max operation current Please refer to voltage and current rating table
Max operation voltage Please refer to voltage and current rating table
Max floating voltage Please refer to voltage and current rating table
Operating voltage RMS CATI 600V CATII 600V CATIII 300V
Common mode voltage RMS CATI 600V CATII 600V CATIII 300V
Typical battery type and life. 9V alkaline layer-built battery/ 15H
Low power indication When battery voltage is lower than 6.5V, battery indicator will
turned red and alert.
Overload indication When the current under test surpasses the range, the buzzer
will buzz
Voltage and current rating table
Parameter
Max operating current (A) Max
operating
voltage (V)
Max
floating
voltage(V)
H(0.01V/A) L(0.1V/A)
DC 100 10 600 600
DC+AC peak value 100 10 600 600

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AC peak value 100 10 600 600
AC peak to peak value 200 20 1200 - -
RMS CAT III 70.7 7.07 300 300
RMS CAT II 70.7 7.07 600 600
RMS CAT I 70.7 7.07 600 600
Figure 1 UT-P4100A Typical Gain VS Frequency curve
Figure 2 UT-P4100B Typical Gain VS Frequency curve

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Figure 3 Max current VS Frequency curve
Figure 4 Typical DC linearity (0.01V/A level)
4. Operating instruction
 Set the coupling mode of the oscilloscope to DC and the input impedance to 1MΩ; To make it easy to
read, users can set the display unit of the oscilloscope from voltage to current display. If user’s
oscilloscope doesn’t have such function, user have to manually set the corresponding attenuation ratio,
for instance, if the probe is H level (0.01V/A), the oscilloscope should be 100X; if the probe is L level
(0.1V/A), oscilloscope is 10X. User can connect the BNC output port with the input port of the
oscilloscope with standard double terminal BNC cable.
 Turn the switch to ON, and the power indicator will light up green.

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 According to the value of the current under test, choose the correct range by pressing button.
 Attention: Different ranges correspond to different attenuation ratio of the oscilloscope.
 Press the Auto Zero button. The buzzer will beep for twice, or it will have a long and continuous beep
meaning the failure of Auto Zero .The external magnetic field can have a little influence to the DC
zero, so do not move the device after Auto Zero.
 Open the clamp of the probe and clamp the conductor under test.
 Attention: There’s direction tip on the current probe clamp. If the direction of the current fits the tip,
output will be positive; On the contrary, the result is negative.
 Adjust the vertical sensitivity of the oscilloscope to get a stable waveform.
5. Mechanic Characteristics
Size of the front current clamp About 100*20*60mm
Size of the back output box About 137*33*35mm
Operation altitude 0~2000 meter
Maximum diameter of the conductor
under test 12mm ø
Length of the cable connecting
current clamp and output box 1 meter
Length of double terminal BNC cable 1 meter
Weight About 223g(without battery)
6. Environment characteristics
Operating temperature 0℃～+50℃
Storing temperature -20℃～+80℃
Operating relative humidity 0℃ to +40℃, 95%RH；
+40℃~+50℃, 45%RH
Pollution Degree Level 2

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7. Maintenance
If the product is in the warranty period and used correctly, and at the same time the malfunction
is caused by the flaws of product itself and have not been disassemble, the company will give free
repair to the product.
 Clamp: Please keep the clamp clean. After long time use, please use soft cloth together with alcohol
to erase the dirt. Please keep the clamp away from damp environment, not to mention direction
contact with water.
 Handle: Please use clean cloth or sponge to clean the handle. Please use little alcohol instead of water
to erase the dirt and parch it.
 To maintain the performance of the product, there can be one check or calibration every year.
8. Troubleshoot
Problem Reason Treatment
No output signal or
amplitude is low
Power is off Turn on the power.
Oscilloscope is AC mode Please set it to DC
mode
Clamp isn’t closed Check the clamp, close
it completely.
Power indicator is off
when the probe is on.
Battery voltage is lower
than 6.5V Change the battery
Amplitude is half The input impedance is 50Ω Set it to 1MΩ

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9. Packing List
Packaging
Name Quantity
Current probe 1
9V battery 1
DC12V/1.2A adaptor 1
BNC output cable 1
Tool box 1
Instruction book 1
Warranty card 1