PT Series Differential Probes
■ PT-8020
INSTRUCTION MANUAL
使用说明书
PT-8020 High Voltage Differential Probe
Attenuation Ratio: 1/100, 1/1000
Max Input:
- DC V: 700V (1/100), 7000V (1/1000)
- AC Vrms: 490V (1/100), 4900V (1/1000)
- AC Vp-p: 1400V (1/100), 14000V (1/1000)
- Bandwidth: DC - 70MHz
Safety Compliance: CE
Voltage Limits: 2500 Vrms MAX CAT III, 5000 Vrms MAX CAT II
Power Indicator: POWER
Table of Contents
- Installation
- Appearance
- Specifications
- Operation Procedure
- Precautions for Use
- Voltage Test Curve
- Overvoltage Indication
- Inspection Steps
- Packing List
Section 1: Safety Statements and Symbols
1. Terms Used in This Manual
Caution! Indicates situations or practices that may cause damage or loss of life.
Warning! Indicates situations or practices that may cause damage to this product or other property.
2. Statements on the Product:
- High Voltage Danger
- Protective Ground Terminal
- Refer to manual for precautions
Section 2: General Safety Overview
Please carefully read the following safety precautions to avoid injury and prevent damage to this product or any product connected to it.
- Must be Grounded: This probe is grounded through the outer casing of the BNC connector and the auxiliary ground terminal, via the ground conductor of the measuring instrument's power cord. When the test instrument is properly grounded, ensure the output BNC connector is correctly connected to the measuring instrument and the auxiliary ground terminal is properly grounded before connecting the input of this probe.
- Use Coaxial Test Probes When Necessary: If you intend to test circuits with this probe, coaxial test probes should be used.
- Do Not Operate Without Covers: To avoid electric shock or fire hazards, do not remove covers during testing.
- Do Not Operate in Wet Environments: To avoid electric shock, do not operate this probe in wet environments.
- Do Not Operate in Flammable Environments: To avoid injury or fire, do not use this probe in flammable environments.
- Avoid Exposed Circuits: To avoid injury, remove jewelry such as earrings, watches, and other metal objects. Do not touch exposed connections and parts.
- Use Appropriate Power Supply: To ensure the probe functions correctly, use 4 AA batteries or the dedicated 6V adapter.
- Do Not Operate if Fault Suspected: If you suspect the product is damaged, have it inspected by qualified service personnel.
Section 3: Description
This differential probe extends the measurement capabilities of oscilloscopes to test waveforms in circuits with high common-mode voltages, making it suitable for applications such as electronic power converters, inverters, motor speed control, switching power supplies, and many others.
PT-8020 Differential Probe (70MHz, 14000V)
Observe Maximum Working Voltage: To avoid injury, when testing each input terminal to ground or between two input terminals with this probe, do not exceed 2500 Vrms CAT III for the test voltage. This voltage value applies to both 1/100 and 1/1000 attenuation settings.
Section 1: Installation
- Connect the probe's BNC output to the oscilloscope or other instrument.
- Install batteries in the probe or connect the supplied power adapter.
- Select the appropriate attenuation setting. For higher resolution and lower noise, select the 1/100 setting when the test signal is below 1400V, and the 1/1000 setting when the signal is above 1400V. Note! To avoid electric shock, use only accessories originally supplied with this differential probe.
- Use appropriate probe accessories to connect to the test circuit. Warning! This probe is for differential testing between two points in a circuit, not for electrical insulation testing between the test circuit and the test instrument.
Section 2: Appearance
The components of this differential probe are as follows:
- A: Output Cable: Connects to the oscilloscope's BNC output connector and the auxiliary ground terminal.
- B: Input Cable: The differential probe output cable connecting to the test hooks.
- C: Test Hooks: Hooks for safe connection to test points in the circuit.
Section 3: Specifications
| Parameter | Value |
|---|---|
| Bandwidth | DC-70MHz (-3dB) |
| Attenuation Ratio | 1:100 / 1000 |
| Accuracy | ±2% |
| Rise Time | 5 ns |
| Input Impedance | Between terminals: 20 MΩ // 0.5 pF; Single-ended to ground: 10 MΩ // 1 pF |
| Input AC Voltage | 1400 Vp-p @ 1/100; 14 kVp-p @ 1/1000 |
| Input DC Voltage | 700 V @ 1/100; 7000 V @ 1/1000 |
| Common Mode Voltage | 7000 V |
| Differential Voltage | 7000 V |
| Peak Voltage | 7000 V |
| Output Voltage | < 7 V |
| Offset (Typical) | < ±5 mV |
| Noise (Typical) | 0.9 mVrms |
| Oscilloscope Input Impedance | 1 MΩ |
| CMRR (Typical) | 50 Hz > 80 dB; 20 kHz > 60 dB |
| Operating Environment Temperature | 0°C - 50°C |
| Operating Environment Humidity | 20-75% RH |
| Power Supply Standard | Adapter or Battery Power |
| Input Cable Length | 30 cm / 60 cm |
| BNC Cable Length | 90 cm |
| Weight | 415 g |
| Probe Dimensions | 187 x 83 x 41 mm |
Voltage Limit Below DC+Peak AC Value and RMS Value
- The supply voltage must be below 12V and greater than 4.4V. Be sure to use the manufacturer's original adapter, otherwise the probe may be damaged or may not operate normally.
- Normal polarity is positive input, negative output. If the polarity is reversed, the internal circuitry will protect the probe, and dangerous damage will not occur.
- When the battery power is insufficient, the power indicator light will flash.
Section 4: Operation Procedure
- Connect the BP-250 to the output terminal of the PT-8020 and to the oscilloscope.
- Adjust the vertical switch on the oscilloscope if necessary.
- Set the attenuation ratio and vertical switch on the oscilloscope to the same position.
- Before testing, estimate the voltage value to be measured. Exceeding the voltage range may damage the probe.
- Before turning on the probe, it is best to set the probe to the maximum attenuation gear. Connect the power adapter to the probe, toggle the power switch, the green light will turn on. If the test voltage exceeds the range, the red light will turn on.
- Set the oscilloscope's attenuation ratio according to the probe's selected attenuation ratio.
- Connect the probe hook to the object to be measured and start measuring.
- After the measurement is complete, first turn off the circuit being measured, then turn off the probe switch, disconnect the probe hook from the object being measured, and unplug the BNC connector from the oscilloscope.
Section 5: Precautions for Use
When measuring, try to coil the input cables to better eliminate lead inductance and external noise, improving high-frequency response and anti-interference capabilities. The coiling method is shown in the figure below:
Try not to extend the input cable, as this will introduce more noise.
Section 6: Voltage Test Curve
Maximum absolute input voltage test curve:
Section 7: Overvoltage Indication
If the input voltage signal exceeds the probe's maximum test voltage, the overvoltage indicator light will turn red. If this occurs, the probe's output signal may not accurately display the input signal.
Section 8: Inspection Steps
- Connect the probe's BNC output to the oscilloscope.
- Install batteries or connect the supplied adapter.
- Set the oscilloscope input coupling to DC and 1V/div.
- Connect the probe hook wires.
- Select the 1/1000 attenuation setting.
- A normally amplified 50Hz/60Hz sine wave appearing on the oscilloscope indicates that the probe is working correctly.
Section 9: Packing List
| Item | Quantity |
|---|---|
| Differential Probe Main Unit | 1 |
| Test Hooks (BP-368N) | 1 Pair |
| 6V Adapter (W&T-AD1806A060030K) | 1 |
| Instruction Manual | 1 Copy |
| Certificate of Conformity | 1 Copy |
Note: The default accessory shipped is test hooks. If you need to change to other accessories such as alligator clips or IC clips, please contact our sales personnel!
PT-8000 Series Differential Probe Selection Guide
| Model | Bandwidth (-3dB) | Accuracy | Attenuation Ratio | Measurement Range (Vp-p) |
|---|---|---|---|---|
| PT-8001 | DC-25MHz | ±2% | 1:10 / 1:100 | 700 V |
| PT-8101 | DC-100MHz | ±2% | 1:10 / 1:100 | 700 V |
| PT-8002 | DC-25MHz | ±2% | 1:20 / 1:200 | 1400 V |
| PT-8110 | DC-100MHz | ±2% | 1:100 / 1:1000 | 1400 V |
| PT-8010 | DC-70MHz | ±2% | 1:100 / 1:1000 | 7000 V |
| PT-8020 | DC-70MHz | ±2% | 1:100 / 1:1000 | 14000 V |
