3M DL, SE Calibration , Studies and sessions , Special features

Appendix A
132
Models SE and DL
Other
Maximum peak level - 3 dB over the full scale readin g.
Calibration
Pre-calibration - When performed, valid prior to the st art of a session.
Post-calibration - When performed, valid for the pre vious study in the ses-
sion.
Storage - All calibrations for a session are stored in the related ses sion file.
Calibrators - All 3M Calibrators have an output of 114dB at 1 kHz, and som e
may have other settings. See “Preparing to calibrat e” in Chapter 6) or
additional information about calibrators.
Studies and sessions
Run-time clock - Duration of every run and session sh own in screens as
well as added to the session file.
Manual operation - Run, Pause and Stop keys.
Programmed operation - Three Auto-Run modes:
• Date (four options).
• Day of the week (any time on any day).
• Timed (future start time).
Triggered runs - Trigger on measured SPL or on external input. Triggers
can start a study, then either pause in the session or stop the session.
Triggered outputs - Output logic signals related to run s tatus.
Special features
Security
Runs - Prevents the pausing of a study without first providin g a 4-digit code.
Setups - Prevents the changing of settings without first providi ng a 4-digit
code.
Codes - Run and setup security can use different codes.