Micsig DP750-100 High Voltage Differential Probe User Manual

1. Overview

Designed with an unconventional appearance, the DP750 adopts a solution with integrated test line and probe, featuring shielding function and an integrated interface end in a compact box. This design eliminates the need to twist cables, resulting in a lower noise floor and reduced interference.

The probe offers a maximum bandwidth of 100MHz and a maximum input voltage of 750V. It features switchable 50X / 500X attenuation ratios, high accuracy, and a low noise floor that is unaffected by ratio switching. It supports one-press Zero calibration and overvoltage alarm. The DP750 is powered via USB and is compatible with any brand of oscilloscope. It also supports direct power supply with Micsig UPI multi-function interface oscilloscopes, automatically matching the scope's attenuation coefficient without manual adjustment.

The DP750 is widely used in the research and development, commissioning, or maintenance of switching power supplies, frequency converters, electronic ballasts, frequency conversion home appliances, and other electrical power devices.

2. Specifications

3. Panel Description

1) Differential probe control module

BNC port: Signal Output

Button: Auto Zero

Spring Pin: Power Input

Indicator: Current Ratio, Zero, Overrange

Button: Ratio Switch

Cable: to Signal Box

Textual description of diagram: The differential probe control module features a BNC port for signal output, an 'Auto Zero' button, a spring pin for power input, indicators for current ratio, zero status, and overrange, a 'Ratio Switch' button, and a cable connecting to the signal box.

2) Probe signal box

Signal Input Cable: +

Signal Input Cable: -

Cable: to control module

Textual description of diagram: The probe signal box has two signal input cables, labeled '+' and '-', and a cable that connects to the control module.

3) Power adapter

BNC port: To oscilloscope

BNC port: To probe control module

Contact: Connect to control module spring pin

Type-C port: Connect to 5V power supply

Textual description of diagram: The power adapter includes BNC ports for connection to an oscilloscope and the probe control module, a contact point for the control module's spring pin, and a Type-C port for 5V power supply connection.

5. Precautions

1) Calibration

Before starting measurements, calibrate the probe's zero point: short-circuit the two input terminals, power on, and press and hold the "Zero" button for 3 seconds. Both indicators will flash simultaneously, indicating successful calibration after 3 seconds.

2) Oscilloscope Requirements

When connecting the differential probe output to an oscilloscope, ensure the oscilloscope's bandwidth is no less than 100MHz and its input impedance is no less than 1MΩ.

3) Warm-up

It is recommended to use the probe after a 10-minute warm-up period for more accurate data.

4) Support

If the product experiences a functional failure, please contact your local dealer or Micsig directly.

6. Warranty

The main body of this differential probe is guaranteed for 1 year. During the product warranty period, Micsig is responsible for free maintenance for faults caused by product quality under normal use, without dismantling or repairing.

The warranty is invalid in the following cases, but maintenance services are provided with waived labor costs and only spare parts charged:

• Consumers damage any accessories due to improper use, maintenance, or storage.
• Damage caused by force majeure factors, such as natural disasters.

In the following cases, Micsig will refuse to provide maintenance services or will provide them for a fee:

• Inability to provide product packaging or anti-counterfeiting labels on product packaging.
• The content of the anti-counterfeiting label has been altered or is blurred and unrecognizable.
• The product has been dismantled by any unauthorized person (e.g., changing wires, dismantling internal components).
• No sales voucher is provided, or the content of the sales voucher does not match the product.

7. Safety

• Non-professionals should not open the product shell.
• Do not use the product with its shell open.
• When measuring, do not touch any bare metal.
• In case of overload, please disconnect the power supply and input immediately.
• Do not use in flammable and explosive environments.

4. Operation Steps

1) Using Micsig UPI Interface

When the oscilloscope has a Micsig UPI (universal probe interface), connect the differential probe output end to the oscilloscope input channel to power the probe.

2) Without Micsig UPI

If the oscilloscope does not have a Micsig UPI: First, connect the differential probe to the power adapter PA05, then connect both to the oscilloscope input channel. Second, connect the Type-C cable to a 5V DC power supply to power the adapter.

3) Select Attenuation Ratio

Select the appropriate attenuation ratio on the differential probe control module according to the voltage range of the signal under test.

4) Connect to Signal

Connect the signal input lines on the signal box of the differential probe to the signal under test to begin measurement. If the signal exceeds the voltage range of the current ratio, the indicator will flash; in this case, turn off the signal under test and disconnect the differential probe power supply.

5) Configure Oscilloscope

Set up the oscilloscope to observe the signal being tested by the differential probe.

Contact Information

Shenzhen Micsig Technology Co., Ltd.

Phone: +86 755-88600880

Email: sales@micsig.com

Web: www.micsig.com

Address: 1F, Huafeng International Robot Industrial Park, Hangcheng Rd, Bao'an District, Shenzhen, Guangdong, China