Casella-cel CEL-281 Manual de usuario descargar pdf (Pagina 129)

18. Using a slim screwdriver, reach through the hole in the upper

circuit board and adjust the trim potentiometer on the lower

board (shown in Figure 23) until the display indicates 114.0 dB.

The analog section has now been trimmed for the replacement

microphone.

19. Switch the calibrator OFF.

20. Remove both calibrator and coupler from the microphone.

21. Remove the keypad from the dosimeter.

22. Press the dosimeter ON/OFF switch in once to unlatch it and

switch the instrument OFF.

23. Remove the dosimeter battery pack.

24. Carefully replace the plastic insert around the ON/OFF switch

and multi-pin connector.

25. Position the microphone cable in the cut-out provided for it in

the instrument rear cover.

26. Replace the front cover, first carefully engaging it around the

plastic insert.

27. Re-fasten the four screws, but leave them loose.

28. Insert the cover for the connector and controls into its guides.

29. Tighten the four screws.

The instrument is now ready for operation using the replacement micro-

phone.

Technical Information_

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Casella-cel CEL-281 Manual de usuario Pagina 129