Casella CEL CEL-296 - Manual (Page 7)

The following other earlier types of CEL sound level meter may also
be used, although special procedures and cables may be required.
Please consult your local CEL representative for details.
CEL-193 Precision Integrating Impulse Sound Level Meter
(Type 1I),
CEL-175 Precision Integrating Impulse Sound Level Meter
(Type 1I),
CEL-187 Precision Integrating Sound Level Meter (Type 1).
The CEL-160 Graphic Level Recorder is able to control the
frequency switching so that level can be plotted against frequency.
However, as none of these instruments contain the CEL low power
serial interface, the autoscan and memory functions cannot be used.
Refer to Chapter 5 for detailed instructions for operating the filter set,
and to Chapter 3 for a technical description of its functions. Please
turn to Chapter 4 to prepare the instrument for use.
CEL Instruments Ltd CEL-296/3 Operator Handbook Page 7