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

6. Refer to the ISS SIM Connections illustration and connect only th e sensor
cables as shown. You will connect the power cables in the next procedure.

3-Volt Lithium Battery

(wireless models only)

Transmitter
ID Switches

UV SUN RAIN WIND

UV SUN RAIN WIND

TEMP

HUM

SIM Power Cable
(wireless only)

UV Sensor Cable

Solar Radiation Cable

Rain Collector Cable

Anemometer Cable

Temp/Humidity Cable

Console Cable (cabled only)

Procedur e 8. Power the SIM.

Powering the Cabled ISS SIM

Cabled versions of the ISS receives power from the console via the 100’ (30m)
cable that runs between them.

• Plug the console cable into the SIM connector labeled “CONSOLE”.

Installation Outline Page 9

Powering the Wireless ISS SIM

Wireless versions of the ISS receive most of their p ower from the so lar panel
installed next to the r ain collec tor. Backup power is provided by a 3-volt lithium
battery.

Battery Holder
(Wireless Only)

DavisTalk T r ansmitter ID DIP Switch Settings

Console Cable Connector

(Cabled Only)

ON

1234

DIP Switch #4

1. Install the new b at te ry in t he S IM. The green test LED s hou ld bli nk onc e on
power up.

2. Check that the DavisTalk transmitter DIP switches on the new transmitter
board match those o n the old board. Change the settings if necessary.

3. Connect the SIM power cable.

Note:DIP switch #4 on the new transmitter board should be in the OFF position.

Procedure 9. Decommission the old SIM (Wireless I SS only)

Even after removing the battery, the old transmitter board will still have some
power reserves an d will conti nue to transmit dat a to your Vantage Pro console
for up to 8 hours. In order to prevent the old transmitter board from sending
erroneous data to your console, change the DavisTalk transmitter DIP switch
setting on the old board.

1. Remove the battery from the old SIM.

1. Use a pen or other device with a fi ne point to change the setting of DIP
switch # 1, #2, or #3. You only need to move one of these switches to change
the ID setting.

2. As an added precaution, change the ol d tra ns m itt er b oard DIP switch #4 to
the ON position. This will put the board in Test Mode, and more quickly
discharge the boar d’s pow er r e serves. In Test Mode the green LED test light
will flash approximately every 2.5 seconds.

Procedure 10. Test Communication

Test your ISS to verify it is communicating with your Vantage Pro console by
spinning the wind cups or turning the weather vane.

• If your console is in Setup Mode, you will need to exit Setup Mode to

perform this test. Exit Setup Mode by pressing and holding the DONE
key.

• The console shoul d display these mov emen ts within a coup le of seco nds.

Page 10 Installation - ISS with Internal SIM

Procedure 11. Mount the ISS and SIM Hou sing

Refer to the following illustrations and refer to this section in your ISS Installa­tion Manual to mount the ISS and the new SIM Housing. If you removed the ISS
from it’s mounted po sition to install the Fan-Aspi rated ISS Retrofit Kit, you can
now re-mount it.

1. To prevent erroneous
rain counts by your rain
collector, put the console
into Setup Mode before
mounting it. Enter Setup
Mode by pressing and
holding the DONE key
while you press the “­”(down arrow) k ey.

2. Install the ISS in it’s
former location.

3. Install the SIM housing
adjacent to the I SS as
shown in the illustra­tions.

4. When you have finishe d
mounting the ISS, exit
Setup Mode on the con­sole by pressing and
holding the DONE key.

1/4" Flat Washers

1/4" Lock Washers

1/4" x 1-1/2" Lag Screws

5. Return the old tr ansmit­ter board to Dav i s Instru­ments in the new board’s
shipping box. Use the
included return ship­ping label.

6. (Wireless Models only)
Please be sure the battery
has been removed from
the old board bef ore
shipping it.

U-Bolts

1/4" Lock Washer

1/4" Flat Washer

1/4" Hex Nut

Installation Outline Page 11

Procedure 12. Return the Ol d SIM to D avis

1. Please return the old SIM and SIM housing (if you have one), in the Fan­Aspirated ISS Retrofit Kit shipping box.

2. Include the shipping paperwork you received with the Retrofit Kit.

3. Ship to: Davis Instrume nts

Attn: Returns
3465 Diablo A ve.
Hayward, CA 94545

Page 12 Installation - ISS with Internal SIM

Installation - ISS with External SIM

Use these steps to install the retrofit kit on an ISS that has the SIM mounted
externally in the SIM housing.

Note:Use this procedure if your ISS already has the SIM mounted in an external housing.

Procedure 1. Rem ove the ISS and SI M Housing from the ir
Installed Position.

You need to move the ISS to a safe place where you can disassemble the radia­tion shield and replace the Temp/Hum sensor.

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. Open the SIM housing and unplug the anemometer sensor cable, labeled
WIND.

3. If you have a cabled station, unplug the console cable from the SIM.

4. Remove the ISS and the SIM housing. Move them to a safe work area.

Procedure 2. O pen the Radiat ion Shield

1. Remove the three screws connecting the rain collector base from the

mounting bracket as shown belo w:

2. Lift the rain collector base off of the mounting bracket.

Tip: For easier re-assembly, mark the holes in the mounting bracket used by the

rain collector base, the holes used by the radiation shield, and the orientation of
the bracket relative to the radiation shield.

Installation Outline Page 13

3. Remove the car db oard packing insert and discard.

1" Screws (3)

Lock Washers

Flat Washers

Rain Collector
Base

Mounting

Bracket

AC MODELS

Sensor

Mounting Bracket

with Solar Panel

SOLAR MODELS

Cable

Sensor

Cable

SIM

Power

Cable

AC

Power

Cable

Radiation Shield

Removing the Rain Collector Base

4. Remove the three (3) screws con ne cting the mountin g bracket to the radi a­tion shield.

5. Lift the mounting bracket off of the radiation shield.

Page 14 Installation - ISS with External SIM

6. Remove the top two (2) radiation shield plates to expose the fan plate and
junction board.

2" Screws (3)

Lock Washers

Flat Washers

Mounting Bracket

SOLAR MODELS

Solar Power

Cable

SOLAR MODELS

Direction

of air flow

Sensor

Cable

Power Cable
AC MODELS

Mounting

Bracket

AC MODELS

Closed Plate

(no hole in center)

Open Plate

(hole in center)

Fan Plate

Battery Compartment

Junction Board

Removing the Mounting Bracket

Installation Outline Page 15

Procedure 3. Mount the new Temp/Hum module

r

t

1. Remove the Fan from the lower section of the radiation shield.

Fan Unit

Motor Connector

Fan Deflector

Temp/Hum

Sensor Cable

Channel

Temp/Hum

Sensor

Cable

Junction Boa

Fan Pla

Fan Removal and Installation

2. Remove the old Temp/Hum module from the radiation shield and replace
with the new Temp/Hum module.

Installing the Temp/Hum Module

3. Reinstall the fan making sure the sensor cable is set into the cable channel.

Page 16 Installation - ISS with External SIM

Procedure 4. Re- assemble the R adiation Shiel d

Refer to the disass embly dra wing s shown in Step 2 t o r e-assem ble the Ra diati on
Shield.

1. Make sure the Temp/Hum sensor cable runs through the cable channel
molded into the fan plate.

2. Install the Junction Board Cover as shown in the illustration. The Junction
Board Cover should press easily into the place.

Junction Board

Cover

Junction

Board

Note:

Press in on Sides
near latches to
install or remove
cover.

3. Place the two radiation s hield pla tes on top of t he fan plate, ope n plate first

with the closed plate on top, being careful to line up the three screw holes.

4. Gently place the mounting bracket on top of the radiation shield, being

careful to line up the three screw holes and also being very careful not to
move the top two (2) radiation shield plates.

Note: Solar ISS: Place the mounting bracket with the solar panel positioned opposite

the location of the junction board.

5. Hold the mounti ng bracket in place with one hand while you start the

three (3) long screws.

Tip: Be sure to start all three screws before you tighten any of them.

6. Place the rain collector base on top of the mounting bracket and fasten

using three screws. Do not over-tighten.

7. Install the rain collector cone on the base, making sure that nothing inside

the cone interferes with the tipping bucket operatio n.

Procedure 5. Disconnect all Cable s from the Old SIM.

Open up your old SIM housing and disconnect all cables from the SIM.

Installation Outline Page 17

Procedure 6. 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.

3-Volt Lithium Battery

(wireless models only)

Transmitter
ID Switches

UV SUN RAIN WIND

UV SUN RAIN WIND

SIM Power Cable
(wireless only)

UV Sensor Cable

Solar Radiation Cable

Rain Collector Cable

Anemometer Cable

Temp/Humidity Cable

Console Cable (cabled only)

TEMP

HUM

1. Take one of the square rubber grommets from the bottom of the SIM hous­ing 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, Ane­mometer, and Temp/Hum sensor cables through it.

Page 18 Installation - ISS with External SIM

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 cable lengths as
needed for a tidy installation.

6. Refer to the ISS SIM Connections illustration and connect only th e sensor
cables as shown. You will connect the power cables in the next procedure.

Procedur e 7. Power the SIM

Powering the Cabled ISS SIM

Cabled versions of the ISS receives power from the console via the 100’ (30m)
cable that runs between them.

• Plug the console cable into the SIM connector labeled “CONSOLE”.

Powering the Wireless ISS SIM

Wireless versions of the ISS receive most of their p ower from the so lar panel
installed next to the r ain collec tor. Backup power is provided by a 3-volt lithium
battery.

Battery Holder

(Wireless Only)

DavisTalk T r ansmitter ID DIP Switch Settings

Console Cable Connector

(Cabled Only)

ON

1234

DIP Switch #4

1. Install the new b at te ry in t he S IM. The green test LED s hou ld bli nk onc e on

power up.

2. Check that the DavisTalk transmitter DIP switches on the new transmitter

board match those o n the old board. Change the settings if necessary.

3. Connect the SIM power cable.

Note:DIP switch #4 on the new transmitter board should be in the OFF position.

Installation Outline Page 19

Procedure 8. Decommiss ion the Old SIM (Wir eless ISS on ly)

Even after removing the battery, the old transmitter board will still have some
power reserves an d will conti nue to transmit dat a to your Vantage Pro console
for up to 8 hours. In order to prevent the old transmitter board from sending
erroneous data to your console, change the DavisTalk transmitter DIP switch
setting on the old board.

1. Remove the battery from the old SIM.

1. Use a pen or other device with a fi ne point to change the setting of DIP
switch # 1, #2, or #3. You only need to move one of these switches to change
the ID setting.

2. As an added precaution, change the ol d tra ns m itt er b oard DIP switch #4 to
the ON position. This will put the board in Test Mode, and more quickly
discharge the boar d’s pow er r e serves. In Test Mode the green LED test light
will flash approximately every 2.5 seconds.

Procedure 9. Test Communication between the ISS and the con­sole

Test your ISS to verify it is communicating with your Vantage Pro console by
spinning the wind cups or turning the weather vane.

• If your console is in Setup Mode, you will need to exit Setup Mode to

perform this test. Exit Setup Mode by pressing and holding the DONE
key.

• The console shoul d display these mov emen ts within a coup le of seco nds.

Procedure 10. Moun t the ISS and SIM Ho using

Refer to the following illustrations and refer to this section in your ISS Installa­tion Manual to mount the ISS and the new SIM Housing. If you removed the ISS
from it’s mounted position to insta ll the Fan-Aspirated ISS Retrofit Kit, you can
now re-mount it.

1. To prev ent err oneous rai n counts by y our rain co llector, put the console into
Setup Mode before mounti ng it. Enter Set up Mode by pressin g and holding
the DONE key while you press the “-”(down arrow) key.

2. Install the ISS in it’s former location.

3. Install the SIM housing adjacent to the ISS as shown in the illustrations.

4. When you have finished mounting the ISS, exit Setup Mode on the console
by pressing and holding the DONE key.

5. Return the old transmitter board to Davis Instruments in the new board’s
shipping box. Use the included return shipping label.

6. (Wireless Models only) Please be sure the battery has been removed from
the old board before shipping it.

Page 20 Installation - ISS with External SIM

1/4" Flat Washers

1/4" Lock Washers

1/4" x 1-1/2" Lag Screws

U-Bolts

1/4" Lock Washer

1/4" Flat Washer

1/4" Hex Nut

Installation Outline Page 21

Procedure 11. Return the Old SIM to Davis

1. Please return the old SIM and SIM housing (if you have one), in the Fan­Aspirated ISS Retrofit Kit shipping box.

2. Include the shipping paperwork you received with the Retrofit Kit.

3. Ship to: Davis Instrume nts

Attn: Returns
3465 Diablo A ve.
Hayward, CA 94545

Troubleshooting

Please contact Davis Technical Support if you have any questions or if you
encounter problems in stalling the Fa n-Aspirated ISS Retrofit Kit Retrofit Kit.

Contacting Davis Instr uments

[phone] for Technical Support, Monday – Friday, 7: 00 a.m. – 5:30 p.m.
Pacific Time.

[phone] Fax to Custo m er Service or Tech Support.
www.davisnet.com Copies of User Manuals are available on the “Support”

page. Watch for FAQs and other updates. Subscribe to Davis’ e-newsletter.
[e-mail] E-mail to Technical Support.

Page 22 Installation - ISS with External SIM

Troubleshooting Page 23

FCC Part 15 Class B Registration Warning

This equipment has been tested and found to comply with the limits for a class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable
protect io n ag a inst harmful interference in a residential ins tallation. Thi s eq ui p men t generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications. However, there is
no guarantee that inte rfe renc e wil l n ot occ u r in a pa rt i cul ar installation.

If this equipment does cause harmful interference to radio or television reception, which can
be determined by turning th e equipment of f and on, the user is enco uraged to tr y to c orr ect th e
interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

Changes or modifications not expressly approved in writing by Davis Inst rum e nts m ay void
the user’s authority to operate this equipment.

Product Numbers: 6921, 6921C
Davis Instruments Part Number: 7395.132

Fan-Aspirated ISS Retrofit Kit
Rev. B (April 16, 2003)

This product complies with the essential protection requirements of the EC EMC Directve 89/336/EC.
Copyright ©2003 Davis Instruments Corp. All rights reserved.

Vantage Pro is a registered trademark of Davis Instruments Corporation.

3465 Diablo Avenue, Hayward, CA 94545-2778 U.S.A.

510-732-9229 • Fax: [phone]

E-mail: [e-mail] • www.davisnet.com