As a Biomedical Equipment Technician (BMET), it is important to understand and perform ground checks and leakage tests in order to ensure the safety and proper functioning of medical equipment. Here’s an overview of what these tests are and how to perform them:
- Ground checks: A ground check is a test that is performed to ensure that the equipment is properly grounded. This is done by measuring the resistance between the equipment’s ground terminal and a known ground reference, such as the building’s ground or a ground rod. The resistance should be low, typically less than 1 ohm. If the resistance is high, it may indicate a problem with the ground connection and the equipment should not be used until it is repaired.
- Leakage test: A leakage test is a test that is performed to ensure that there are no dangerous levels of electrical current leaking from the equipment. This is done by measuring the current flowing through the equipment’s ground connection. The current should be low, typically less than 0.5 milliamperes. If the current is high, it may indicate a problem with the equipment and it should not be used until it is repaired.
- Safety checks: Before performing ground check and leakage test, make sure to follow the standard safety protocols such as wearing PPE, disconnecting power to the equipment, and verifying that the equipment is properly grounded.
- Testing equipment: A digital multimeter is the most common equipment used to perform ground checks and leakage tests. Make sure to use a multimeter with an appropriate range and accuracy for the equipment you are testing.
- Documenting results: It is important to document the results of ground checks and leakage tests in order to track the safety and performance of the equipment over time.
By performing regular ground checks and leakage tests, BMETs can ensure that medical equipment is safe to use and operating within safe limits. This will help to prevent electrical shock and fires, and ensure that the equipment is providing accurate and reliable results.