Diamatic 08013A, 08014A Libro De Instrucciones página 8

ENGLISH
EN
Air Quality Monitoring
Warning: Deployment of a monitor/detector is essential for the safe operation of any equipment that
has the potential to produce CO. CO sensors/detectors became available on the mass market around 1978.
At present several brands sell in the fi fty-dollar range. The main differences between the technologies in-
volved are battery or electric and Semiconductor or Biomimetic types. Detectors for carbon monoxide (CO)
are manufactured and marketed for use in either the home or occupational industrial settings. The detectors
for home use are devices that will sound an alarm before CO concentrations in the home become hazard-
ous. There is an Underwriters Laboratories, Inc., performance standard (UL 2034) for residential CO detec-
tors. Detectors currently available on the market are battery-powered, plug-in, or hard-wired. Some models
incorporate a visual display of the parts per million (ppm) concentration of CO present in the home. For more
information on CO detectors for home use, call the Consumer Product Safety Commission Hotline at 1-800-
638-2772.
CO detectors for use in residential settings are not designed for use in typical workplace settings. Moni-
toring requirements in an occupational setting are different from monitoring requirements in the home. In the
workplace, it is frequently necessary to monitor a worker's exposure to carbon monoxide over an entire work
shift and determine the time-weighted average (TWA) concentration of the exposure. It may also be neces-
sary to have carbon monoxide monitors with alarm capabilities in the workplace. The direct-reading instru-
ments are frequently equipped with audio and/or visual alarms and may be used for area and/or personal
exposure monitoring. Some have microprocessors and memory for storing CO concentration readings taken
during the day. It is signifi cant to note that some of the devices mentioned for workplace CO monitoring are
not capable of monitoring TWAs, and not all are equipped with alarms. The appropriate monitor must be cho-
sen on an application-by-application basis. For more information on the availability of workplace CO monitors
or their application, call the National Institute for Occupational Safety and Health at 1-800-35-NIOSH (1-800-
356-4674).
Room Size and Time Estimations for Parts Per Million (PPM) CO
The fundamental factors in area CO levels involve:
The concentration and volume of CO production;
The size of the area;
The amount of *air exchange if any;
The amount of time CO is produced.
Multiplying length, width, and height will determine the volume or cubic feet in a room. So an empty build-
ing 100ft by 100ft with a 10ft ceiling would be 100,000 cubic ft. in size. Any material that is in the room and
takes space would reduce the cubic feet.
*Air exchange is defi ned as the exhausting of internal air to the external atmosphere.
The Graph above depicts the relationships of air exchange to time and CO ppm with cubic feet area
and percent CO emissions remaining constant.
1.5% CO Emission in 100,000 cubic feet with 480cc 14 HP Engine and complete air/CO mixing
500
450
400
350
300
250
200
150
100
50
0
0 .5
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1 2 3 4 5
Time (hours)
6 7 8 9
BLASTRAC Operator's Manual (EN) - Concrete Polisher
0.0 change/hr
1/2 change/hr
1 changes/hr
2 changes/hr