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If operating in a wet environment, place several desiccant packs in the logger and plug the vent hole
in the bottom of the logger enclosure to minimize moisture.
Mounting
It is possible to mount the logger and sensors on either a 1.5 meter or 3 meter mast (Part # M-MPB and
M-MPA respectively). The shorter mast is especially useful for smaller system configurations where you
are trying to minimize the size and visibility of the system.
There are many ways to install the mast depending on the site. Common mounting methods include
pounding the post into the ground, setting it into concrete, and bolting it to existing structures.
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If you will be mounting PAR, wind speed, or rain gauge sensors, be sure that you install the mast
vertically (using Mast Level, Part # M-MLA).
•
Use the Guy Wire Kit (Onset Part # M-GWA) to stabilize a tall mast. Use 1/2 inch stakes (Part # M-
SKA) to secure the guy wires.
•
Mount the logger vertically and high enough that ground splash will not enter the vent on the
underside of the enclosure.
•
If using U-bolts, make sure they are for 1-5/8 inch pipe because that is the hole spacing on the logger
mounting bracket.
•
If mounting the logger to a post or wall, note that it is 2.06 inches between the center of the holes in
the mounting brackets. It is recommended that you use 5/16 inch diameter bolts to mount the logger.
Installing Sensors
•
If running cables along the ground, we recommend running them through conduit to protect them
from animals (some animals like to chew on the cables), lawn mowers, and being tripped on.
•
For information on protecting the sensors properly, refer to the sensor manuals.
•
Leave enough slack in the cables so that they can be routed into the logger.
•
If you are deploying multiples of the same sensor type, be sure to note the serial number on the cable
associated with each measurement location so you can interpret the data later.
2
Onset Computer Corp.
HOBO Station
Tri-pod Setup Guide
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