Ventostat
8007/8008 Engineering Specification The
CO2 sensor for demand control ventilation shall be the
8007 or 8008 non-dispersive infrared sensor made by Telaire®
(805-964-1699). The flow-through gas chamber in the sensor
should incorporate a reflective, gold plated light pipe,
or waveguide surrounded by a gas permeable 10 micron filter
of 0.050” thickness that prevents particulate contamination
of the sensor. The sensor shall provide simultaneous analog
outputs in volts and milliamps and shall have a gold contact
relay that can be operated as normally open or closed.
All sensor electronics shall be conformal coated for durability.
The sensor shall sample duct air through a pitot tube
assembly that connects to the sensor through tygon tubing.
The sensor shall incorporate elevation correction adjustment
and ABCLogic™
(Automatic Background Calibration) software for self-correction
of drift to better than ±10 ppm per year. The sensor shall
have accuracy of ±100 ppm or 7% of the reading (whichever
is greater). All adjustments to the sensor including output
scaling, elevation adjustment, relay setpoint, relay dead-band,
linear or exponential output, and single-point calibration
shall be made via computer connected to an on-board RJ45
jack. The 8008 product shall also be adjusted using the
on-board push buttons and LCD display. For ease of installation,
the sensor shall have a detachable base with all field
wiring terminals on the base. This product meets or exceeds
specifications for the Model Ventostat® 8002P.
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The
CO2 sensor for demand control ventilation shall be the
8007 or 8008 non-dispersive infrared sensor made by Telaire®
(805-964-1699). The flow-through gas chamber in the sensor
should incorporate a reflective, gold plated light pipe,
or waveguide surrounded by a gas permeable 10 micron filter
of 0.050” thickness that prevents particulate contamination
of the sensor. The sensor shall provide simultaneous analog
outputs in volts and milliamps and shall have a gold contact
relay that can be operated as normally open or closed.
All sensor electronics shall be conformal coated for durability.
The sensor shall sample duct air through a pitot tube
assembly that connects to the sensor through tygon tubing.
The sensor shall incorporate elevation correction adjustment
and ABCLogic™
(Automatic Background Calibration) software for self-correction
of drift to better than ±10 ppm per year. The sensor shall
have accuracy of ±100 ppm or 7% of the reading (whichever
is greater). All adjustments to the sensor including output
scaling, elevation adjustment, relay setpoint, relay dead-band,
linear or exponential output, and single-point calibration
shall be made via computer connected to an on-board RJ45
jack. The 8008 product shall also be adjusted using the
on-board push buttons and LCD display. For ease of installation,
the sensor shall have a detachable base with all field
wiring terminals on the base. This product meets or exceeds
specifications for the Model Ventostat® 8002P.