Casella CEL CEL-440 - Manual (Page 7)

1. INTRODUCTION
Please read Sections 1.1 to 1.4 before commencing measurement. For a
quick introduction to instrument operations, Chapter 4 may be used as a
tutorial.
1.1 Display & Keys
73.8dB
ØØØØ Ø:1Ø
ASmx
30 100
dB
AS
Aeq
ASmn Zpk
L L 65.4dB 69.9dB
L
L
L 69.4dB
980014
MENU
DATA
Stop /Run /Pause indicator
(Instrument is in Run mode)
Period number
Battery condition
Principal parameter
Principal level
Run-Time elapsed
Bandwidth
Icons showing active keys
Measurement/
Instrument information
Icon showing active (cursor) key
Analog display of SPL
Icon showing active (cursor) key
Switches instrument On/Off
Changes menu (=operating mode)
Enables Quick Edit function
Operates display back light
Move cursor (=select options)
Stops a measurement
Accesses stored data
Starts/Pauses/Restarts a
Measurement run
Figure 1: Display & Key Identities
(Further icons may be shown during operation)
Introduction
CEL-440/480 Operators Handbook - Page 7