How do I calibrate my TENMARS TM-103 Sound Level Meter Data Logger with an Acoustic Calibrator?

[LeHarley]

To ensure accurate readings, calibrating your TENMARS TM-103 Sound Level Meter Data Logger using an Acoustic Calibrator is crucial. Here's a straightforward guide to help you calibrate your sound level meter effectively:

1. Prepare for Calibration:

   • Ensure you have a standard Acoustic Calibrator that generates a 94dB, 1KHz Sine wave.
   • Set your TENMARS TM-103 to dBA and Time weighting to FAST.

2. Insert the Microphone:

   • Carefully place the microphone nozzle into the insertion hole of your Acoustic Calibrator.

3. Initiate Calibration:

   • Press the A/C button on the sound level meter.
   • Press and hold the HOLD button and the A/C button simultaneously for over a second. The LCD screen will begin blinking, indicating calibration mode.

4. Complete Calibration:

   • Release the A/C and HOLD buttons while the LCD is blinking.
   • If the calibration is successful, the sound level meter will display 94.0 dBA. If not, repeat the process until the meter shows the correct value.
   • For optimal accuracy, recalibrate your TENMARS TM-103 annually.