NTi Audio Minilyzer ML1 - Manual (Page 25)

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c. Calibration Panel
The Minilyzer ML1 enables the calibration of microphones, such as
the MiniSPL.
Fig 3.8 Calibration Panel
Select CALIB. in the LEVEL SPL panel field. Press the enter key and
the calibration screen SET SENSITIVITY ... will be displayed (Fig 14).
The following three calibration modes are available:
TO DEFAULT MINISPL-MIC: All MiniSPL are factory calibrated to a
sensitivity of 20.0 mV/Pa. Reset to default setting:
• Select the GO! field on the left.
• Press the enter key to start.
• OK! is shown to confirm the completed calibration.
USING EXT. REF.: The sensitivity may be adjusted with an external
calibrator to produce a certain calibrated sound pressure level.
• Select the dB
SPL
-value, press the enter key and adjust with the
cursor keys the sound pressure level generated by the calibrator.
Use up/down keys for 1.0 dB
SPL
steps and left/right keys for 0.1
dB
SPL
steps. The setting range 80 - 140 dB
SPL
is supported.
• Confirm the setting with the enter key.
• Produce the specific reference signal with the calibrator to the
microphone attached.
• Press the left cursor key to select the GO! field and press enter to
execute the calibration, whilst the reference signal of the calibrator
is still present.
• The frame WORKING ... followed by the frame CALIBRATION
FINISHED! is shown centered on the calibration screen if all has
been found in good order. Otherwise various error indications may
Measurement Functions