UNI-T UT-P4100A ACDC Current Probe
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.
- 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.
- 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.
Note: 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 |
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.
Introduction about probes and accessories
- 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
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 |
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.
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) |
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 |
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.
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 |
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 |
Documents / Resources
 | UNI-T UT-P4100A ACDC Current Probe [pdf] Instruction Manual UT-P4100A 100A-600kHz, UT-P4100B 100A-2MHz, UT-P4100A ACDC Current Probe, UT-P4100A, ACDC Current Probe, Current Probe, Probe |