How do I calibrate my TENMARS TM-103 Sound Level Meter Data Logger?

[VonDelaney]

Calibrating your TENMARS TM-103 Sound Level Meter Data Logger is crucial for ensuring accurate sound level measurements. Here's a straightforward guide to help you calibrate your meter using a standard acoustic calibrator:

1. Prepare for Calibration:

   • Ensure you have a standard acoustic calibrator that generates a 94dB, 1KHz sine wave.
   • On your TENMARS TM-103, set the display to dBA and the Time weighting to FAST.

2. Insert Microphone:

   • Carefully place the microphone's nozzle into the insertion hole of your acoustic calibrator.

3. Initiate Calibration:

   • Press the A/C button on the sound level meter.
   • Then, press and hold both the HOLD button and the A/C button simultaneously for over a second. The LCD screen will start blinking, indicating that the meter is in calibration mode.

4. Complete Calibration:

   • While the LCD is blinking, release both the A/C and HOLD buttons.
   • If the calibration is successful, the sound level meter should display 94.0 dBA.
   • If the display doesn't show 94.0 dB, repeat the calibration process until the correct value appears.

Remember to recalibrate your TENMARS TM-103 once a year to maintain optimal accuracy. Following these steps ensures your sound level meter provides reliable readings.