Casella CEL CEL-281 - Manual (Page 102)

criterion levels can be accepted for use, i.e. criterion levels
≥ threshold level as described in Section 2.2.2 and shown in
Table 1.
9. Press the key again to return to the parameter that was
being inspected to see the result of the calculation using the in-
dicated criterion level.
10. While noise dose levels are being displayed, and irrespective of
which Q value and criterion level are in current use, if neces-
sary press the key to show the current threshold level on
the main display.
11. Press the key again (several times) until the required
threshold level is displayed.
A series of up to five different levels can be selected (70 dB,
75 dB, 80 dB, 85 dB,and 90 dB). However only valid threshold
levels can be accepted for use, i.e. threshold levels
≤ criterion
level as described in Section 2.2.5 and shown in Table 1.
12. Press the key again to return to the parameter that was
being inspected to see the result of the calculation using the in-
dicated threshold level.
5.3 Time Information
Provided the CEL-281 is not in calibration delay mode or calibration
mode, and the display is switched ON, it can display various items of
time information as follows at any time, without interrupting any logging
that might otherwise be occurring.
1. Load and/or check batteries, perform a field accuracy check
(acoustic calibration), select time and frequency weightings, and
Obtaining Required Results
CEL-281 Operator's Handbook - Page 93