Casella-cel CEL-424 Bedienungsanleitung PDF herunterladen (Seite 5)

5. Perform Acoustic Calibration

Operations are performed by a sequence of key strokes.

Perform a field accuracy check

each time the instrument is switched ON

using a CEL-282 (Class 2) or CEL-284/2

(Class 1) Calibrator as follows.

Fit the microphone into the CEL-

4725 Coupler supplied with the calibrator,

making sure it is pushed firmly into contact

with the shoulder in the coupler cavity.

Then fit the coupler complete with micro-

phone into a CEL-282 (or CEL-284/2) Cali-

brator, again ensuring that it makes contact

with the shoulder in the calibrator cavity.

(To aid removal, the coupler flange does

not fit close against the calibrator housing).

Switch the calibrator ON, then fol-

low the instruction after the Start Up sequence of displays has finished.

Calibrator

980057

1/4"

Microphone

O'Ring

Shoulder

Microphone

Coupler

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Casella-cel CEL-424 Bedienungsanleitung Seite 5