Davis 7702 Installation Manual
ENSOR
S
M
OUNTING
A
RM
The Sensor Mounting Arm provides an ideal mounting location for all of your
Davis weather station sensors. This manual is designed to take you through the
process required to assemble and mount the Sensor Mounting Arm. Please take
the time to read through this manual before beginning.
C
OMPONENTS
The Sensor Mounting Arm includes the following components. Please make
sure you have all listed components before continuing.
Sensor Arm
✦
✦
Mounting Bracket
✦
16.5-foot (5 m) Ground Wire
Installation Hardware Kit
✦
One 3/8” Cable Clamp
a.
b.
Four 3/16” Cable Clamps
c.
Three 3/8” Cable Ties
d.
Four 1/4” x 1-1/2”
(38 mm) Lag Screws
Eleven #8 Flat Washers
e.
Six #8 Split Lock Washers
f.
Six #8-32 Hex Nuts
g.
Eight 1/4” Flat Washers
h.
i.
Eight 1/4” Split Lock
Washers
j.
Eight 1/4”-20 Hex Nuts
k.
Four 5/16” Flat Washers
Four 5/16” Split Lock
l.
Washers
Four 5/16”-18 Hex Nuts
m.
Product # 7702
n.
Two 1/2” U-Bolts (for
anemometer arm)
o.
Two 1/2” Saddles
Two 1-1/2” U-Bolts (for
p.
pipe with outside diameter
between 1” and 1-1/4”
(25 mm and 31 mm)
q.
Two 2-1/4” U-Bolts (for
pipe with outside diameter
between 1-1/2” and 2-3/8”
(38 mm and 60 mm)
r.
Two 2-1/4” Saddles
s.
Three #8-32 x 3/4”
(19 mm) Screws
Two #8-32 x 2 -1/2”
t.
(64 mm) Screws
T
A
OOLS
In addition to the components listed above, you will need some of the following tools and materials. Please be sure you have everything you need before
beginning the installation.
SSEMBLING
The assembly of the sensor arm involves attaching the mounting bracket and
then attaching all desired sensors. Instructions for attaching sensors (other than
the anemometer) to the Sensor Mounting Arm are contained in the manual for
that sensor or for the accessory which allows that sensor to be attached (such as
the Radiation Shield or the Rain Collector Shelf). The Sensor Mounting Arm
includes provisions for attaching the following sensors:
M
AND
✦
✦
✦
✦
✦
✦
✦
✦
ATERIALS
Medium Phillips Screwdriver
Wrench or Pliers
11/32” (9 mm) Nut Driver or Socket Wrench
If mounting the anemometer on the same side as the Radiation Shield.
THE
S
Anemometer
External Temperature Sensor, External Temperature/Humidity Sensor, or Stainless
Steel Temperature Probe (with Radiation Shield or Solar-Fan-Aspirated Radiation
Shield)
Rain Collector (with Rain Collector Shelf)
UV Sensor (with or without Tilting Mechanism)
Solar Radiation Sensor (with or without Tilting Mechanism)
N
ENSOR
EEDED
OUNTING
M
A
RM
Page 2 Sensor Mounting Arm
The Sensor Arm
The illustration below shows the sensor arm and indicates which holes are
used by the various sensors, brackets, and accessories.
S
A
H
RM
OLE
A
SSIGNMENTS
ENSOR
Typical Sensor Mounting Arm Installation
The illustration below shows a typical Sensor Mounting Arm installation
with all possible sensors attached to the sensor arm.
T
S
YPICAL
ENSOR
M
OUNTING
A
RM
I
NSTALLATION
Assembling the Sensor Mounting Arm Page 3
TTACHING
A
In order to attach the mounting bracket to the sensor arm, you will need the
sensor arm, mounting bracket, two #8-32 x 2-1/2” screws, four #8 flat washers,
two #8 split lock washers, and two #8-32 hex nuts.
1. Place one #8 flat washer over the end of each of the #8-32 x 2-1/2” screws.
2. Position the mounting bracket so the holes in the mounting bracket line up with the
3. Slide each of the #8-32 x 2-1/2” screws (with washer) through the holes on the sensor
4. Secure the mounting bracket to the sensor arm using a #8 flat washer, #8 split lock
THE
appropriate holes on the sensor arm.
arm and the mounting bracket.
washer, and a #8-32 hex nut on each screw end.
Tighten until the mounting bracket is securely fastened to the sensor arm.
OUNTING
M
A
TTACHING
RACKET
B
THE
M
OUNTING
B
RACKET
Page 4 Sensor Mounting Arm
TTACHING
A
You may mount the anemometer on either side of the sensor arm. The preferred mounting location for the anemometer is on the end closest to the
mounting bracket. However, if you have an anemometer with a straight arm
and a Rain Collector attached to the Sensor Mounting Arm, the Rain Collector
might create obstruction problems which result in inaccurate wind speed and
direction readings. In this case (and only in this case), you may want to mount
the anemometer on the end farthest from the mounting bracket.
In general, you should mount the anemometer below the sensor arm, following
the instructions in “Attaching the Anemometer Below the Sensor Arm (Preferred)” on page 6. If, however, you need to mount the anemometer arm on the
end farthest from the mounting bracket
mounted on that side as well, attach the anemometer above the sensor arm, following the instructions in “Attaching the Anemometer Above the Radiation
Shield” on page 9.
THE
NEMOMETER
A
and
you have a radiation shield
T
A
YPICAL
NEMOMETER
Attaching the Anemometer Page 5
M
OUNTS
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