Unit UT-P4100A Manuale utente

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Low Frequency ACDC Current Probe

UT-P4100A (100A/600kHz)

UT-P4100B (100A/2MHz)

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

Attention



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

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

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

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



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

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

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

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.



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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