Viking E-1600-03A-EWP Application Note

Viking
Brand
Viking
Model
E-1600-03A-EWP
Type
Application Note
APPLICATION
APPLICATION
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EWP
EWP
Enhanced Weather
Protection
March 3, 2004
Standard practice for manufacturing emergency phones is to provide them
with standard uncoated circuit boards (like the ones in your PC). A few man-
ufacturers, including Viking, spray the circuit boards with a water resistant
material such as acrylic conformed coating to protect them.
Some emergency phone applications demand extra protection. Phones that
are mounted outside exposed to the elements in salty air near the ocean, in
high humidity, exposed to a corrosive atmosphere or vehicle exhaust all
need an extra measure of weather and corrosion resistance.
Our EWP (Enhanced Weather Protection) phones are designed with total
reliability in mind. First,
we use weather-sealed
push button switches, trim
pots and DIP switches so
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• Urethane potting for:
- Maintaining flexibilty at low temperatures
- Excellent electrical insulation
- Low stress on sensative componenants
- Unaffected by moisture at high temperatures
- Thermal cycling ability
- Hydrolytic stability
- No shrinkage
• Sealed switch, LED, trim pots, push button and
microphone connections
• All wires are hand soldered
• Mylar speaker with special weather-proof boot
• Field adjustable trim pots and DIP switches
• Closed cell foam gasketing to prevent water penetration
• Weatherproof connectors filled with anti-corosive sealing gel
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Enhanced Weather Protection Now Available
on Selected Viking Products
you can adjust microphone and speaker volumes and set program-
ming features right at the installation site.
Then, we hand solder all wires to eliminate the kind of corrosion that
can occur in ordinary electrical connectors. We also hand seal the
connections at the push button switch, microphone, and "Call
Connected" LED using a special non-corrosive silicone sealant. We
use a special microphone boot that acts as a shield against water penetration. A mylar
speaker is used with rubber mounting gasket. Closed cell foam gasketing is used
behind front panels to prevent water penetration.
Finally we "Pot" the entire board in a clear flexible urethane
encapsulating material leaving the weather sealed field-
adjustable trim pots and DIP switches accessible. Our flexible
polyurethane sealant allows the circuit board and it’s components
to expand and contract, while maintaining weather resistance. To
protect tip and ring connections, we include connectors filled with
anti-corrosive sealing gel.
Model
BLK-3-EWP
E-10/20A-EWP
E-1600A-EWP
E-1600-03A-EWP
E-1600-20A-EWP
E-1600-45A-EWP
E-1600-50A-EWP
E-1600-52A-EWP
E-1600-55A-EWP
E-1600A-BLT-EWP
E-30-EWP
K-1700-3-EWP
W-1000/2000A-EWP
W-3000-EWP
Fax Back #
653
210
215
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212
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Description
Line Status Strobe Light Kit
Speaker Phones
ADA Compliant Handsfree Emergency Phone
ADA Compliant Handsfree Emergency Phone
ADA Compliant Handsfree Emergency Phone
ADA Compliant Handsfree Emergency Phone
ADA Compliant Emergency Phone Kit
ADA Compliant Emergency Phone Kit
Univeral Emergency Phone Kit
Emergency Tower Phone with Strobe Light
Stainless Steel Handsfree Phone
Stainless Steel Handsfree Phone with Keypad
Handsfree Doorboxes
Vandal-Resistant Stainless Steel Doorbox
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• Exposure to harsh elements (outdoor emergency phones)
• Exposure to a salty atmoshere near the ocean (beach, board-
walk or lifeguard emergency phones)
• High-humidity environments (tropical environments and areas
where it gets very hot and humid)
• Corrosive-atmosphere environments
• High-pollution environments
• High-vehicle exhaust environments (roadside assistance and
emergency phones)
  • Page 1 1

Viking E-1600-03A-EWP Application Note

Viking
Brand
Viking
Model
E-1600-03A-EWP
Type
Application Note
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