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計測機器 Galaxy Audio Check-Mate CM-140のPDF 取扱説明書をオンラインで閲覧またはダウンロードできます。Galaxy Audio Check-Mate CM-140 12 ページ。 Sound level

ƒ Power Button

The ¡

key turns the sound level meter ON or OFF.

„ MAX / MIN Hold button

Press

MAX

MIN

recording mode. Select the proper level range before

using MAX/MIN to ensure that reading value will not

exceed the measurement range. Press once to select

MAX value. Press again to select MIN value, and press

again to select current value with "MAX MIN" "

enunciator blinking.

Press

MAX

MIN

MAX/MIN mode.

Note: If change sound level range or change A-C

weight, the MAX.MIN mode will clear.

... Frequency Weighting Select Button

A: A - Weighting. For general sound level measurements.

C: C - Weighting. For checking the low-frequency content

of noise.

(If the C-Weighted level is much higher than the A-

weighted level, there is a large amount of low-frequency

noise)

† Time Weighting Select Button.

FAST: for normal measurements

SLOW: for checking average level of fluctuating noise.

‡ Level Range Control Button

Each time the level button is pressed, the level range will

change between "Lo" level, "Med" level and "Hi" level in

the circular manner.

ˆ Microphone

1/2 inch Electret condenser microphone

button to enter the maximum and minimum

and hold down button for 2 seconds to exit the

CM-140 SPL METER