DAVIS VANTAGE PRO ISS Retrofit Kit, ANTAGE PRO, VANTAGE PRO PLUS Installation Instructions Manual
VANTAGE PRO® AND VANTAGE PRO PLUS
™
Fan-Aspirated ISS Retrofit Kit
Installation Instructions Estimated Time Required: 60 Minutes
These instructions describe how to install the Vantage Pro® Fan-Aspir ated
Integrated Sensor Suite (ISS) Retrofit Kit.
This retrofit kit applies to all cabled and wireless versions of the fan-aspirated
ISS.
Components
The Fan-Aspirated ISS Retrofit Kit includes the following components:
• Externally-mounted SIM with housing
• Temperature/Humidity sensor module
• Rain Collector cable extension
• New SIM Power cable
• Splice kit to attach extens ion cables
• Mounting hard wa r e for new SIM housi ng
Tools for Setup
In addition to the kit, you will need the following tools:
• Small Phillips-head screwdriver
• Pliers or other crimping tool
• Other hand tools depending on your installation
Tip: If your Wireless Fan-Aspirated ISS has been in service for over a year, this would
be a good opportunity to replace the C-cell batteries used by the fan.
Installation Outline
Early version of the fan-aspirated ISS mounted the sensor interface module
internally inside the radiation shield. Newer versions of the fan-aspirated ISS
mount the SIM module in an external housing. The installation procedure for
the two different versions are outlined separately below.
CAUTION:Please work on your Vantage Pro ISS in a safe place. We strongly recommend
that you remove the ISS from its installed position before beginning these steps.
Product # 6921, 6921C
ISS With Internally Mounted SIM
These are the procedures required to install the Fan-Aspirated ISS Retrofit Kit
on an ISS that has the SIM mounted inside the radiation shield. More detailed
directions are provided on the following pages.
1. Remove the ISS from its installed position.
2. Disconnect all cables from the old Sensor Interface Module (SIM) and
remove the SIM from the radiation shield.
3. Mount the new Temp/Hum module.
4. Re-assemble the radiation shiel d.
5. Locate and cut the rain collector cable.
6. Splice on the rain collector cable extension.
7. Connect sensor cables to the new SIM.
8. Power the SI M.
9. Decommission the Old SIM (Wireless models only).
10. Test Communication between the ISS and the console.
11. Mount the ISS and the SIM Housing.
12. Return the old SIM to Davis.
ISS With Externally Mounted SIM
These are the pr ocedur es r equir ed to i nstall the Fan -Aspirated ISS Ret r ofit Kit in
an ISS that has the SIM mounted in an external housing. More detailed directions are provided on the following pages.
1. Remove the ISS from its installed position.
2. Open the radiation shield.
3. Mount the new Temp/Hum module.
4. Re-assemble the radiation shiel d.
5. Disconnect all cables from the old SIM.
6. Connect sensor cables to the new SIM.
7. Power the SI M.
8. Decommission the Old SIM (Wireless models only).
9. Test Communication between the ISS and the console.
10. Mount the ISS and the SIM Housing.
11. Return the old SIM to Davis.
Page 2
Installation - ISS with Internal SIM
Use these procedures to install the retrofit kit on an ISS that has the SIM
mounted inside the radiati on shield .
Note:Use this procedure if your ISS has wing nuts on the bottom.
Procedure 1. Rem ove the ISS from its Installed Position.
In order to take down your ISS you wil l first need to disconnect the anemomet er
cable. If you h ave a Cabl ed Vantage Pro station , you w ill al so n eed to discon nect
the console cable from the ISS.
CAUTION:Please work on your Vantage Pro ISS in a safe place.
1. At your Vantage Pro console, press and hold the DONE key and then pr ess
the “-” (down arrow) key to put the conso le in Setup Mode. This will prevent the reception of erroneous rain counts from the rain collector.
2. If you have mounted the anemometer remotely from the ISS or if you have
a cabled ISS you will need to open the radiation shield. Remove the three
wing nuts and separate the upper and lower sections of the radiation
shield.
#8 Wing Nuts
#8 Lock Washers
#8 Flat Washers
Fan Plate
Junction Board
ISS
Upper
Section
ISS
Lower
Section
Installation Outline Page 3
3. Locate the SIM inside the upper section of the radiation shield.
Sensor Interface Module
(SIM)
Solar Power Cable
(wireless models only)
Sensor Interface Cable
4. Disconnect the WIND sensor (anemometer) cable.
5. If you have a cabled station, you will also need to disconnect the Console
cable from the SIM.
6. You can now remove the ISS from its mounted position. Move it to a safe
place to install the kit components.
Procedure 2 . Di sc o nn ec t all ca b les fro m t he S IM and r emo ve t he
SIM.
The Sensor Interface Module (SIM) consists of a PC board and cover. The SIM
contains the ISS’s sensor and communications electronics.
Transmitter ID Switches
Console Cable
(cabled models only)
3-Volt
Lithium Battery
(wireless models only)
SIM Power Cable
(wireless models only)
WIND RAIN SOLAR UV
Solar Radiation Cable
Sensor Interface
Cable
Anemometer
Rain Collector Cable
UV Sensor Cable
Fan-Aspirated Radiation Shield SIM Cable Connections
1. Unplug all cables from the SIM.
Page 4 Installation - ISS with Internal SIM
2. The SIM transm itter boar d, dust c over, and rear cover plat e (not shown) a r e
attached to the top radiation shield plate using 4 screws. Unfasten these
screws and remove the dust cover along with the board and mounting
plate.
3. Remove the SIM power cable, solar panel cable and the Sensor Interface
Cable from the junction board located in the lower section of the radiation
shield.
Solar and SIM Power Connectors
(Wireless ISS Only)
+VSIM
+VSIM
+VSOL
Fan Connector
MOTOR
+5V
AC Power Adapter Connector
(Cabled ISS Only)
Temp/Hum Sensor
T/H & SIM
Connector
TAC H
Sensor Interface
Connector
Junction Board Connections
Procedure 3. Mount the New Temp/Hum Module
1. Remove the fan and fan deflector from the lower section of the radiation
shield.
Fan Unit
Motor Connector
Fan Deflector
Temp/Hum
Sensor Cable
Channel
Junction Board
2. Remove the old Temp/Hum module from the radiation shield and unplug
it from the junctio n board.
Installation Outline Page 5
Fan Plate
3. Install the new Temp/Hum module, being sure to set the sensor cable in the
cable channel in the fan plate. The new Temp/Hum module cable will plug
directly into the SIM instea d of the jun ction board.
4. Reinstall the fan and fan deflector.
5. The new SIM power cable has a brown terminal at one end and a white terminal at the other end. Plug the brown terminal of the new SIM power cable into
the junction board connector labeled +VSIM.
Installing the Tem p/H um Senso r
Procedure 4. Re- assemble the radi ation shield .
Junction Board Cover
Junction Board
1. Line up the t hr eaded r ods on the upper s ection of t he r adiation shield wit h th e
mounting holes in the lower sectio n.
2. Slide the two sections partially t ogeth er, leaving enough clearance so y ou have
access to the junction board.
Press in on Sides
near latches
to Remove Cover
3. Check the Junction Boar d connections: fan motor, SIM power and Solar (SOL)
power (wireless models), AC-power adapter (cabled models).
Page 6 Installation - ISS with Internal SIM
4. Install the Junction Board cover as shown above. The cover installs easily
by pressing it into place.
5. Slide the two sections of the Radiation Shield completely together.
6. Fasten the two section s together usi ng the 3 f lat washe rs, lock washers, a nd
wing nuts. The wing nuts should be finger-tight.
Procedure 5. Locat e and cut the rain collect or cable.
These cables must be extended in order to reach the SIM housing.
1. Locate the rain collector cable hanging underneath the rain collector base.
The rain collector cable is labeled “RAIN” near the modular connector.
2. Take the wire cutters and cut the rain collector cable next to the modular
“phone-style” connector.
Procedure 6. Splice on t he rain collector cable ext ension.
For the best connection, note the following suggestions:
• Try to place the spliced connections in a location shielded from rain.
• When securing cables, place a cable clip or tie on each sid e of t he connec-
tion point so the movement of the cables does not cause the connection
to pull apart.
• Use the smaller splice connectors to extend the rain collector cable.
Follow this procedure to splice on the rain collector cable extension:
1. Use a wire stripper or a knife to strip away a bout 1½ inches (38 mm) of the
jacket (the outer covering) of the cab le.
Do not strip away any of the colored insulation on the individual wires.
Repeat this procedure for the end of each cable you are connecting.
Strip Shielding
2. Take a wire from one of the cables and place it into one of the holes at the
end of a splice connector .
Make sure you push the wire all the way in. You can check this by looking
through the clear side of the splice connector.
Installation Outline Page 7
3. Take the same colored wire from the other cable and place it into the other
hole at the end of the splice connector.
✦ Make sure you push the wire all the way in. You can check this by
looking through the clear side of the splice connector.
Using Splice Connector
4. Use pliers to snap the cap into place, securing the wires.
✦ Use the provided yellow splice connectors.
5. Repeat this procedure for each pair of wires to be spliced.
6. Use a cable tie to secure the two cables together as shown.
Doing this provides a measure of strain relief which should prevent the
wires from pulling apart under normal conditions. Cut off the excess cable
tie when it is secure.
7. Gather the wires and splice connectors neatly together and secure with a
cable tie in a protected location up close under the rain collector base.
Procedure 7. Connect Sensor Cables to the New SIM.
The ISS sensors are connected by cables to the Sensor Interfa ce Module (SIM),
located inside the new SIM housing. The SIM contains electronics that measure
and store weather values for transmission to the console via cable or radio. The
SIM housing protects the SIM from the elements and provides easy access to
SIM cable connections.
1. Take one of the square rubber grommets from the bottom of the SIM hous-
ing and run the cables for th e UV and Solar Radia tion sens ors thr ough it , if
included on your station.
2. Wireless ISS: Run the SIM Power cabl e through this first grommet.
3. Take the second square rubber grommet and run the Rain Collector, Ane-
mometer, and Temp/Hum sensor cables through it.
4. Cabled ISS: run the console cable through this second grommet.
5. Install the first grommet in the left slot in the SIM housing, and install the
second gromme t in the right slot, adjusting the inside ca ble lengths as
needed for a tidy installation.
Page 8 Installation - ISS with Internal SIM
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