Casella CEL CEL-281 - Manual (Page 24)

The keypad can be removed to eliminate the danger of accidentally re-
setting the instrument or losing measurements. This will also prevent
unauthorised tampering with and damage to the keypad, ensuring a long
and effective life for the instrument.
The dosimeter module carried by the wearer is housed in a strong abra-
sion resistant plastic case, with the connector protected by a sliding
cover and the microphone attached via a screened lead. The casing is de-
void of all switches and features only a large digital display which shows
measurement criteria and results simultaneously. If added security is re-
quired, the display can be switched off when required.
After noise measurements have been completed, the CEL-281 can be
connected via the keypad connector, directly to a PC for further analysis,
data manipulation, origination of report ready documentation, and perma-
nent storage of an individual's noise exposure pattern. For example,
noise dose data can be exported into a suitable file structure to enable
manipulation in industry standard database and spreadsheet formats and
allow linking with existing personnel records.
It is also possible to download a preselected selection from the contents
of the dosimeter store directly to a standard printer via a standard CEL
C6231 Interface Cable.
This handbook describes operation of the CEL-281 Dosimeter with the
CEL-6012 Keypad and printer only.
Operation with a PC is described in the CEL-6171 Application Software
handbook.
2.2 Explanation of Terms Used
2.2.1 Sound Exposure
Sound Exposure is often thought of in terms of Noise Dose be-
cause it is similar in concept to the Dose-Exposure relationship used
in occupational medicine when defining the maximum permissible hu-
man exposure limits to toxic substances.
Page 16 - CEL-281 Operator's Handbook
Introduction_