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C-LOGIC is a brand dedicated to providing high-quality electrical measuring instruments and environmental control solutions for professionals and DIY enthusiasts. The product lineup includes digital multimeters, leakage clamp meters, light meters, voltage testers, and wire tracers, all designed to meet rigorous safety standards such as CAT II and CAT III.

In addition to test equipment, C-LOGIC offers programmable digital thermostats for efficient heating and cooling management. Often associated with the MGL International group, C-LOGIC focuses on reliability, precision, and user safety in electrical diagnostics and home climate control.

• What does 'OL' mean on my C-LOGIC multimeter display?

  'OL' stands for Open Loop or Over Limit. It appears when the measured value exceeds the currently selected range or when there is an open circuit during a resistance or continuity test.

• How do I replace the battery in my C-LOGIC device?

  Generally, you must disconnect the test leads, turn off the device, and remove the screws on the rear battery cover. Replace the battery (typically 9V or AAA) observing the correct polarity, and secure the cover before use.

• Are C-LOGIC thermostats compatible with 2-wire systems?

  Yes, many C-LOGIC digital thermostats, such as the 400-TC, are designed for 2-wire heating or cooling systems. Always check the specific wiring diagram in your user manual.

• How do I use the Data Hold function?

  Press the 'HOLD' button during a measurement to freeze the current reading on the display. The 'H' symbol will usually appear. Press the button again to return to normal measurement mode.