Casella CEL CEL-296 - Manual (Page 17)

LOW BAT
This indicates that the voltage supplied to the CEL-296/3 is below
approximately 3.2 V. and that either the internal batteries must be
replaced, or the external power supply must be checked or
changed.
Readings taken while this indicator is showing should be
discounted when absolute accuracy is required.
Hz or KHz
Frequency annotation, either Hz or KHz is displayed at the right
hand end of the LCD, as selected by the or nudge buttons.
Arrows
Six arrow markers along the bottom of the display that indicate
which current memory has been selected.
During the start up sequence, the arrows show which memory
locations have a set of data already stored,
dB
Level annotation, this is displayed at the left hand end of the LCD
only when the filter set is used with a sound level meter fitted with
the CEL low power serial interface, (unless non-noise parameters
are being displayed, at which time the readings are invalid).
3.3 Autoscan & Spectrum Storage Facilities
These facilities are available ONLY when the instrument is
operated with a CEL sound level meter equipped with the low
power serial interface.
The CEL-296/3 can be operated under the control of its
microprocessor to perform autoscan analysis and store the
CEL Instruments Ltd CEL-296/3 Operator Handbook Page 17