Hobo RS1 User Manual

Solar Radiation Shield, Unassembled (RS1) Manual

The RS1 Solar Radiation Shield is recommended for temperature and RH measurement accuracy in locations
exposed to direct or reflected solar radiation. It can be mounted on tripods, masts, or flat vertical surfaces.
The Solar Radiation Shield works with HOBO® Pendant® loggers (UA-00x-xx), the HOBO Water Temp Pro v2
(U22-001), the TidbiT v2 (UTBI-001), HOBO Prov2 Internal Temp/RH data logger (U23-00x), HOBO MX2300
series data loggers, and external temperature sensors for Onset data loggers.

Components

There are two types of components to the Solar Radiation Shield: the plates that join together to form the
radiation shield and the installation hardware kit.

Radiation Shield Parts

a. One Cover Plate

b. One Support Plate

c. One Flat Plate

d. Three Closed Plates

e. Three Open Plates

Installation Hardware Kit

a. Two Clip Mounts

b. Three 1/2 in. (13 mm) spacers

c. Three 1 in. (25 mm) spacers

d. Three Plastic Screw Retainers

e. One Cable Tie

f. One Wall Mount Bracket

g. Two 1-1/2 in. U-bolts

h. Four 1/4 in. Flat Washers

i. Four 1/4 in. Hex Nuts

j. One Cable Clamp

k. Three # 8 x 5 in. (127 mm long) Threaded Rods

with #8 Push Nuts

l. Three #8 x 2-3/4 in. (70 mm long) Pan Head

Screws

m. Three #8 x 1-3/4 in. (44 mm long) Pan Head

Screws

n. Three #4 Flat Washers

o. Four #4 x 1/2 in. (13 mm long) Pan Head Self-

Threading Screws

p. Twelve #8 Flat Washers

q. Nine #8 Split Lock Washers

r. Six #8 Hex Nuts

s. Three 38 Wing Nuts

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Tools and Materials Needed

You may need the following tools and materials depending on
the logger you are using and how you will be mounting the
Solar Radiation Shield. Read this manual before beginning the
installation to be sure you have everything you need. It is
recommended that assemble as much of the shield as you can
before going to the field.

• Small Phillips-head screwdriver and medium slotted-head
screwdriver

• Wrench or pliers

• Drill with 3/16 in drill bit (4.7 mm) to drill pilot holes if

attaching Solar Radiation Shield to the top of a post

• Adjustable wrench or 11/32 in. wrench and 7/16 in.
wrench to tighten hex nuts (11/32 in wrench) or to drive
lag screws into wall or post (7/16 in wrench)

• Four 3/4 in x 1-1/2 in. lag screws (38 mm long) to attach
Solar Radiation Shield to a post or wall

• Three #8 x 1 in. screws (25 mm long) to attach Solar
Radiation Shield on the top of a post (if #8 x 2-3/4 in. pan
head screws provided create clearance problems)

• Tape to hold screws in place when assembling Solar
Radiation Shield

Solar Radiation Shield, Unassembled (RS1) Manual

Location Recommendations

Use the following guidelines to determine the best location for
mounting the Solar Radiation Shield.

• The Solar Radiation Shield works best when in a location
with a steady breeze. Mount away from fences, buildings,
trees, or other obstructions.

• Install over plants or soil if possible.

• Do not install over or near sprinklers. The Solar Radiation

Shield is not designed to protect the sensor from water
sprayed upwards.

• If attaching to a building, the preferred location is the
north side in the northern hemisphere and the south side
in the southern hemisphere.

Mounting Options

The Solar Radiation Shield may be mounted in three
orientations.

• On the side of a wooden post or a wall

• On a metal pipe with outside diameter between 1 in. and

1-1/4 in. (25 mm and 31 mm)

• On top of a wood post

Determine which orientation best suits your needs before you
begin because the installation instructions differ slightly
depending on how you plan to mount the Solar Radiation
Shield. Note that if you are mounting to the side of a post or
wall, you will be attaching the mounting bracket to the top of
the shield (top mounting). If you are mounting to top of a post,
you will be attaching the bracket to the bottom of the shield
(bottom mounting).

Attaching HOBO Loggers

To attach a HOBO Pendant logger (UA-00x-xx) or a TidbiT v2
(UTBI-001) to the Solar Radiation Shield, install the 1/2 in.
screw eye provided with the RS1 into the standoff of the closed
plate as shown. Attach the logger with a tie wrap.

Screw eye

Standoff

To attach a HOBO Water Temp Pro v2 (U22-001) or a HOBO Pro
v2 Internal Temp/RH logger (U23-00x) to the Solar Radiation
Shield, place the logger in the clamp provided in the U23 Clamp
Kit. Secure the clamp into the standoff on the closed plate as
shown with the screw and washer provided in the kit. Note: The
HOBO Water Temp Pro v2 can be mounted into the shield using
the U23 Clamp Kit, but the clamp fit will not be as snug as it is for
the HOBO Pro v2 Internal Temp/RH logger.

Clamp

Standoff

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Solar Radiation Shield, Unassembled (RS1) Manual

If using a HOBO MX2301 or MX2305 series logger with the Solar
Radiation Shield, attach the logger and bracket (MX2300-RS­BRACKET) to the underside of the closed plate with the screws
included with the bracket as shown below.

Attaching an External Temperature Sensor
from a HOBO Logger

1. Place the sensor cable into the notch on one of the clip
mounts and hold it in place. Hold the clip mount so the
raised semi-circle at the top of the notch will face up.

2. Position the second clip mount over the first, with the notch
facing in the opposite direction, securing the sensor cable
between the two notches. When positioning the second clip
mount, make sure the raised semi-circle will face down.

3. Position the clip mounts over two of the mounting posts on
the closed plate. Make sure you orient the clip mounts as
shown at right.

4. Attach the clip mounts to the mounting posts using two of
the #4 x 1/2 in. pan head self-threading screws and two of
the #4 flat washers.

and a #4 flat washer) so that a loop of cable is formed.
Make sure to mount the clamp so that the flat side will be
up and the bulge side down. Tighten the screw completely
so that the cable cannot move within the cable clamp.

Assembling the Solar Radiation Shield to
Attach to the Side of a Post, Wall, or Pipe

The following instructions explain how to assemble the
mounting bracket to the top of the Solar Radiation Shield for
installation on the side of a post, a wall, or on a pipe. If you plan
to mount the Solar Radiation Shield on top of a post, follow the
instructions in Assembling the Solar Radiation Shield to Attach
to the Top of a Post on page 5.

Assembling the Solar Radiation Shield Plates

1. Slide each of the three #8 x 5 in. threaded rods, with push
nuts installed, through each of the three holes in the three
open plates. When inserting the threaded rods, make sure
the long end (when measured from the push nut) goes
through the holes in the open plates.

2. If you are using an external temperature sensor, feed the
entire remaining length of external temperature sensor
cable attached to the closed plate through the open centers
of the three open plates.

3. Slide the closed plate with the logger over the threaded rod
ends protruding from the top of the open plates so that
logger is enclosed within the center of the open plates.

4. Slide the flat plate over the threaded rod ends protruding
from the closed plate with the logger.

5. Place plastic screw retainers over the protruding threaded
rod ends.

6. Rest the partially assembled Solar Radiation Shield on a flat
surface and go to the next section.

5. Once secured, adjust the sensor so that it and
approximately 1/4 in. (6 mm) of cable protrude from the
clip mounts.

6. Place the cable clamp around the sensor cable
approximately 8 in. (20 cm) from the sensor.

Attached during
final assembly

7. Secure the cable clamp to one of the remaining mounting
posts (using a #4 x 1/2 in. pan head self-threading screw

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Assembling the Radiation Shield Plates