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The Remote Working Level Monitor.

Keefe DJ; McDowell WP; Groer PG
NTIS: Anl/77-xx-90 Available for Reference At Bureau Libraries :166 pages
The remote working level monitor (rwlm) is an instrument used to remotely monitor the radon-daughter concentrations and the working level (wl). It is an alternating current (ac) powered, microprocessor based instrument that multiplexes two independent detector units to a single control processor unit (cpu). The cpu controls the actuation of the detector units and processes and outputs the data received from those remote detector units. The remote detector units are fully automated and require no manual operation once they are set up. They detect and separate the alpha emissions of raa and rac' as well as detecting the beta emissions of rab and rac. The resultant pulses from these detected radioisotopes are transmitted to the cpu for processing. The programed microprocessor performs the mathematical manipulations necessary to output accurate radon-daughter concentrations and the wl. A special subroutine within the program enables the rwlm to run and output a calibration procedure on command. The data resulting from this request can then be processed in a separate program on most computers capable of basic programing. The calibration program results in the derivation of coefficients and beta efficiencies which provides calibrated coefficients and beta efficiencies.
Publication Date
Document Type
CP; Final Contract Report;
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
OFR 140-78
NIOSH Division
Source Name
NTIS: Anl/77-xx-90 Available for Reference At Bureau Libraries
Performing Organization
Argonne National Laboratory
Page last reviewed: October 29, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division