Casella CEL CEL-450 - Manual (Page 58)

Operation Press Display Shows Comments
1. Start from
the final
Self Test
screen.
This screen offers the
Format option.
Perform Step 2 before the
option is replaced by the
Battery Voltage line and the
calibration or menu screens.
2. When
re-format is
required
This screen asks for
confirmation.
Use and to select
Yes or No, then confirm
with .
All stored data (runs) and all
user setups from every
available bandwidth are
deleted.
5.5 Use With Tape and DAT Recorders
(Including Calibration For Line Input)
The sound level meters can be connected to a DAT or tape recorder and
function as an accurately calibrated input system. This enables the
measured sound levels to be recorded for further calculation and analysis.
When recording, connect the recorder to the OUT Phono jack-
socket in the bottom of the sound level meter (Figure 6). This socket
supplies an unconditioned AC signal with a maximum level of 0.5 V
RMS.
When replaying, insert the recorded signal via the IN Phono jack-
socket shown in Figure 6. Suitable signals from other sources may also
be inserted for measurement or analysis in this way.
If an electrical calibration of the instrument using the microphone
substitution method is required, insert the calibration signal via a
CEL-516 Line Input Adaptor (or the earlier CEL-216) screwed into a
CEL-495 Preamplifier in place of the Class 1 microphone. These line
input adaptors and preamplifiers may also be used with a Class 2
instrument.
Then perform an acoustic calibration as described in Chapter 4.
Page 58 - CEL-450/490 Operators Handbook
Operation