Casella CEL CEL-193 - Manual (Page 17)

Casella USA
17 Old Nashua Rd #15
Amherst, NH 03031 USA
CEL 202 DIGITAL DISPLAY UNIT
This self-contained accessory attaches to the base of the instrument and takes an input from the RMS log
output of the CEL-193. This signal is then digitized and fed to the liquid crystal display, it also has an
independent maximum hold arrangement in addition to its digital sound level meter functions. The CEL-
193/2 version has a range encoder fitted that supplies coded information to the CEL-202 in order that it can
automatically adjust its range to take account of the sound level meter attenuator setting such that it is no
longer necessary to add the attenuator and meter indications to give the measured level.
The CEL-193 used in conjunction with the CEL-202 will prove a valuable system to enforcement agencies,
etc. (who have to make measurements in respect of statutory regulations) because of the improved
resolution of the digital display.
13 Specification
Accuracy
IEC 651 Type 1 (Cons. Revision IEC 179/123), BS 4197, DIN 45633. (ANSI S
1.4 when CEL-1868 microphone is fitted).
Functions Leq, LTm, LAX, Lmax, SPL.
Measurement Range 23-155dB(A) or 41-155dB Flat (10Hz-20kHz) (13-145 dB(A) or 31-135dB Flat
if CEL-1 90 microphone is fitted) Measured from + 5dB on noise floor to
microphone limit.
Attenuator Range
10dB steps 20-100dB. (10-90 if CEL-190 microphone is fitted).
Read Out
-5 to + 55dB in 2 x 30dB spans.
Frequency Range 2-30kHz Flat or A weighting as per standards.
Impulse Capability 62dB peak to RMS. 1 msec duration of 6kHz sine waves
accuracy + 0dB -0.5dB.
RMS Time Constants Fast, Slow, Impulse and Peak (50µsec) as per standards.
Overload Indication
Triggered from instantaneous level and RMS level. Automatically remembered
in Lmax and Leq modes.
Leq Calculation Period Continuously updated from 1 second to approximately 1 million hours.
Maximum Holding Periods Holds maximum RMS level for an infinite time without decay.
Pause Manual or remote operation.
Reset
Cancels max and integral values. Safety interlock to prevent accidental
erasure.
Calibration
Field calibration is achieved by means of the CEL-177 Precision Acoustic
Calibrator.
Outputs
Conditioned and unconditioned AC signals plus log DC signal are provided to
feed level recorders, tape recorders, etc.
Temperature Range
-10°C to +50°C.
Batteries
2 x 6F22 (PP3) will provide in the order of 20 hours operation.
Dimensions
50mm x 127mm x 203mm (2 in x 3 in x 8 in).
[email protected] Page 17 of 20 Tel: (800) 366-2966
www.casellausa.com 2 Mar 2009 Fax: (603) 672-8053