Medical Engineering

Many electrical products must undergo electrical safety testing to ensure their safety. These tests include insulation resistance, withstand voltage, ground continuity and leakage current tests. These tests are complex and critical for safety standards compliance.

Leakage current tests can be separated into 3 basic types :

  • Earth Leakage current
  • Enclosure Leakage current
  • Patient Leakage current

The GLC-9000 complies with IEC, UL and other international electrical safety standards requiring leakage current measurement.

GLC-9000 Leakage Current Tester

Features

  • Touch Panel with Color LCD Display
  • 9 Different Measurement Network to Simulate the Resistance of Human Body
  • 8 Different Types of Leakage current
  • Various Leakage Current Measuring Mode:DC/AC/AC+DC/AC Peak
  • Upper & Lower Limitation for PASS/FAIL Judgment
  • Meter Mode with SELV/CONV Function
  • 50 Preset Test Conditions Conform to IEC 60990; 30 Sets Memories for Customer Defined
  • Various Standard Interfaces:RS232/GPIB/USB Host & Device/EXT I/O

Leakage Current Modes
1 Earth Leakage Current Refers to the current that flows through a protective grounding wire to earth. (General Electrical, Medical Equipment)
2 Enclosure Leakage Current Refers to the current that flows through a human body in contact with a device enclosure. (General Electrical, Medical Equipment)
3 Patient Leakage Current I Refers to the current that flows through a human body that is directly connected to a device. (Medical Equipment)
4 Patient Leakage Current II Refers to the current that flows through a human body that is directly connected to a device under faulty conditions.(Medical Equipment)
5 Patient Leakage Current III Refers to the current that flows through a human body that is directly connected to a device that malfunction.(Medical Equipment)
6 Patient Auxiliary Current Refers to the current that flows through a human and a device during normal operation. This is not intended to be perceptive. (Medical Equipment)
Multifunctional Isolated Channel Function Generator

Function generator is an indispensable instrument for generating simulated signals required for testing. However, function generators we often use cannot meet our needs when we encounter simultaneous simulated outputs of more than dual-channel signals, or when we need a larger output current or higher frequency. The MFG-2000 series function generator is different from the conventional function generator architecture, which only has one single-channel or dual-channel. Users can choose from the series the number of channels up to five channels for simultaneous outputs according to their needs, including CH1, CH2 -two equivalent performance AWG channels; one 320MHz RF signal generator; one 25MHz pulse generator and one power amplifier.

The following table shows the functions provided by each model

The MFG-2000 series has built-in medical waveforms, which can provide functional testing of Active Implantable Medical Devices (AIMD). MFG-2000 is designed for isolated channels. MFG-2120MA, MFG-2260MRA and MFG-2260MFA with a built-in power amplifier can easily produce simulated signals of medical devices.

(The following figure shows that the medical waveform is generated from CH1 to the input terminal of the power amplifier, and then the amplified waveform is produced from the input terminal of the power amplifier)

Moreover, the power amplifier with a very small output impedance is ideal for driving non-polar light-emitting components. General function generators cannot drive non- polar light-emitting components, because the output impedance can only be 50ohm or 1Mohm instead of an output impedance close to 0ohm.

The power amplifier function of MFG-2000 can collocate with built-in medical waveforms to generate simulated signals for testing and verifying medical products. The characteristics of output impedance close to 0 ohm can be used to drive non-polar light-emitting components to confirm the actual luminescence phenomenon.

First-tier AC and DC, ASR-3000 series power supply uninterrupted AC+DC transition

GW Instek, a professional T&M instrument manufacturer, rolled out a new programmable AC and DC power supply - the ASR-3000 series on May 5th, 2021, augmenting the existing GW Instek AC power supply family. When designing products, engineers often need to simulate the power states of various countries in the world and they also need to quickly complete the quantification of inrush current when the product is started. More importantly, it is crucial to seamlessly convert output from AC to DC to avoid product downtime problems. The new ASR-3000 series will assist engineers in solving the above practical test and measurement problems to expedite the product launch process.

GW Instek AC power supply family includes: the APS-7000/7000E series and the ASR-2000/3000 series. APS-7000 was specially designed based upon four considerations to strengthen the requirements of various power simulation applications, including 1. For the grid-connected application of new energy, it can conditionally accept reverse current; 2. Supports 600V test requirements; 3. Supports small current measurement from 2mA to 35A; 4. The economical 7000E series with price advantage solves the budget issue. The ASR-2000/3000 series has specially incorporated the DC mode to improve the slow response speed of the DC power supply. Engineers can choose different models according to their needs.

The new ASR-3000 series has four major product advantages:

  • In the face of the challenge of using server power in new energy power supply, the power simulation function of uninterrupted "seamless transition" of AC and DC transition can expedite research and development verification. For 5G/Network communications equipment DC-DC modules, DC low-voltage test points require large current characteristics. The feature that both AC and DC rated power are full power can significantly reduce the transition time of test equipment so as to accelerate the test.
  • It has the excellent peak current supply capability of CF=6 (6 times the output current crest factor) to correctly determine the inrush current test, and it can meet the production needs of AC/DC adapters with sufficient transient power.
  • Allows engineers to directly use the menu method to produce sequential arbitrary waveforms from the power supply. Arbitrary waveform editing sequence control through PC software can also be performed. The test and measurement function can perform simple power analysis.
  • The voltage output range is wider. The maximum AC output is 400V, and the DC is up to 570V, which can meet the requirements of various voltages in the world.

The ASR-3000 series has three models, including ASR-3200 (2kVA), ASR-3300 (3kVA), and ASR-3400 (4kVA). The main application market is for the energy-saving applications of IDC computer rooms. Other than AC input, the server power supply also has HVDC input. ASR-3000 can fully meet the test requirements of AC and HVDC input. At the same time, it also complies with ODCC (Open Data Center Committee) Project Scorpio standards to expand the scope of engineer product design testing. Other application markets include household appliances, business equipment, medical equipment, vehicle-mounted chargers, UPS and other test applications. The brand-new functional design of the ASR-3000 series meets the needs of the market and will give engineers a different testing experience from the past.