10. Technical Information
% Outside Air
- HVAC systems use a combination of outside air, supply air, and
return air to maintain consistent and comfortable air quality. The 1010 can calcu-
late outside air either by measuring temperature or by measuring CO2. The for-
mula for % Outside Air is:
Dew Point Temperature
- This is the temperature at which condensation begins
Wet Bulb Temperature
- This is the lowest temperature evaporating water can
reach
Recommended Levels by Agency
If too little outdoor air enters a home, pollutants can accumulate to levels that can
pose health and comfort concerns. Unless they are built with special mechanical
means of ventilation, homes that are designed and constructed to minimize the
amount of outdoor air that can 'leak' into and out of the home may have higher pol-
lutant levels than other homes. However, because some weather conditions can
drastically reduce the amount of outdoor air that enters a home pollutants can build
up even in homes that are normally considered 'leaky'.
Parameter
IDPH
1
ASHRAE
2
OSHA PEL
3
ACGIH TLV
4
Humidity
20% - 60%
30% - 60%
N/A
N/A
Temperature
68 - 75 (winter)
73 - 79 (summer)
68 - 75 (winter)
73 - 79 (summer)
N/A
N/A
Carbon Dioxide
1,000ppm
(<800ppm preferred)
1,000ppm
5,000ppm
5,000ppm
Carbon Monoxide 9ppm
9ppm
50ppm
25ppm
N/A-Not Applicable or Not Established
1
Illinois Department of Public Health (2009)
2
American Society of Heating, Refrigerating and Air Conditioning Engineers
3
Occupational Safety and Health Administration Permissible Exposure Limit -- this level
is a time-weighted average and is an enforceable standard that must not be exceeded
during any eight-hour work shift of a 40-hour work week.
4
American Conference of Governmental Industrial Hygienist Threshold Limit Value -- this
level is a recommended time-weighted average upper limit exposure concentration for a
normal eight to 10-hour workday and a 40-hour work week.
10. Error Codes & Troubleshooting
CO2 Sensor Error
If the CO2 sensor fails to initialize or is faulty the
1010 will display an error code. Try turning the 1010
off and on again. If it displays the error code again
the 1010 is in need of service. Please return your
instrument to TPI. See section 9.2 for instructions on
returning your meter.
CO Sensor Error
If the CO sensor fails to initialize or is faulty the 1010
will display an error code. Try turning the 1010 off
and on again. If it displays the error code again the
1010 is in need of service. Please return your instru-
ment to TPI. See section 9.2 for instructions on
returning your meter.
CO Sensor Caibration Due
When the last calibration date of the CO sensor is
one year or older the 1010 will display a reminder
that calibration is due before returning to normal
operation. Please return your instrument to TPI for
calibration. See section 9.2 for instructions on
returning your meter.
Temperature and/or Humidity Sensor Error
If the temperature and/or humidity sensor fails to ini-
tialize or is faulty the 1010 will display an error code.
Try turning the 1010 off and on again. If it displays
the error code again the 1010 is in need of service.
Please return your instrument to TPI. See section 9.2
for instructions on returning your meter.
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