Printed in USA 150313
Page 04
Certain substances and gases in the monitored ambient can affect the sensitivity of the sensor, or poison the
sensor completely.
The following are currently known:
- polymerising substances, such as ethylene oxide, acrylonitrile, butadiene, styrene, silicone.
- corrosive substances, such as halogenated hydrocarbons.
- catalytic poisons, such as sulphur and phosphor compounds, silicon compounds, metal vapours.
Caution:
There is a small quantity of corrosive liquid in the sensor element. If in case of damage a person or an area
comes in contact with the liquid, the affected person or area must wash the liquid off with water immediately.
Out of use sensors must be disposed in the same way as batteries.
3 Installation
Note:
Avoid any force (e.g. by thumb) on the sensor element during operation or installation. Electronics can be
destroyed by static electricity. Therefore, do not touch the equipment without a wrist strap connected to ground
or without standing on a conductive floor (acc. to DIN EN100015).
3.1 Mounting Instructions
When choosing the mounting site please pay attention to the following:
•
The mounting height depends on the gas type to be monitored.
For gases and vapours with a density
>
air, the transmitter must be located near the ground.
For gases and vapours with a density < air, the transmitter must be located at the highest point
possible. Gas density and mounting height can be read from the table Cross-sensitivity data.
•
Choose mounting location of the sensor according to the local regulations.
•
Consider the ventilation conditions! Do not mount the transmitter in the centre of the airflow (air
passages, suction holes).
•
Mount the transmitter at a location with minimum vibration and minimum variation in temperature
(avoid direct sunlight).
•
Avoid locations where water, oil etc. may influence proper operation and where mechanical damage
might be possible.
•
Provide adequate space around the sensor for maintenance and calibration work.
Duct mounting
•
Mount only in a straight section of duct with minimum air vortex. Keep a minimum distance of 1 m (3,5
feet) from any curve or obstacle.
•
Mount only in a duct system with a maximum air velocity of 10 m/s (2000 ft/min) or less.
•
Mounting must be performed so that the probe openings are in line with the airflow.
3.2 Installation
•
Open the cover. Unplug basic PCB carefully from the bottom part.
•
Fix bottom part by screws vertically to the wall (terminal blocks to the ground).
•
Plug in the basic PCB at X4 and X5 with care. Replace the cover.
Specifications subject to change without notice. | USA 151203 | Page 4 of 14
12700 Stowe Drive, Suite 100, Poway, CA 92064 | Ph: (858) 578.7887 & (888) GO.IN
TEC
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AT-3300_V3 – UserManual
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