Take the external calibrator and rotate it so that it faces the microphone of your sound level meter. If you’re measuring to any Standard, Regulations or Guidelines it is vital to calibrate your sound level meter. Our calibration engineers in our laboratory are greatly experienced in servicing and calibrating almost all types acoustic measuring equipment, including sound meters, noise meters, dosimeters and multi-purpose equipment. Within your sound meter again, press “OK” to begin the calibration procedure. Then, you simply turn on your calibrator and let it works its magic. If not, the accuracy of your measurements could be called into question. Taking your calibrator and putting it right over your microphone is very effective as well. If in doubt, review instructions in each instrument's user's manual and consult CTC if questions arise. As specialists in the calibration of Sound & Vibration Equipment, we are able to offer both UKAS (17025) and Traceable calibration on a wide variety of measurement instrumentation. The sound meter will notify whether it has passed or failed the calibration at this point. Confirm that you understand the procedures for calibrating each of the instruments you use. Why You Should Calibrate A Sound Level Meter. Turn the calibrator on and check the meter to see if an equal level or one that’s close to the external calibrator’s output level is showing. See Figures 13 and 14 for illustrations of this process for dosimeters and sound level meters, respectively. Take your external calibrator and turn it towards the microphone on your unit. Figure 13. Sound level Calibration / Sound level meter calibration . Leave the calibrator on until the procedure has completed, normally between 5-20 seconds depending on the manufacturer and the model. Noise Dosimeter Calibration . Castle Calibration provide professional sound meter calibration services, giving you fantastic and unrivalled value for your money. Figure 14. If passed, you’re good to go and perform your measurements. Sound Level Meter Calibration . This will calibrate your sound level meter. If this isn’t the case, it’s best to re-tune the whole device, but before resorting to that extreme, check to see if the device has a faulty battery.
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