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Garth Bock
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« on: November 07, 2008, 02:44:45 PM » |
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The university's ISS stopped transmitting. I got maintenance to get it down off the pole for me. I was thinking this was just the dead battery syndrome which it did have. I have it setting here in the office with me for cleaning and testing. Thing is I know the supercap ran down. I was hoping that ambient light from the window would atleast give me a few minutes of transmission during diagnostics. I pull the lithium and transmission stops immediately. I called Davis and they said the ISS won't run with the lithium pulled. Is there a way to test the supercap to find out if it is charging ?
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 Davis VPro2,VWS,WF,VVP,WD,WDL,Cumulus,WV32 |
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talbert1952
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« Reply #1 on: November 07, 2008, 04:31:33 PM » |
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Take the plastic cover off the ISS board and look at the capacitor. If the capacitor has crud growing around the leads you definitely need to replace the capacitor.   |
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Tom W4SNA IRLP 4069 - Echolink W4SNA-R http://tobaccovilleweather.com/Hardware: Davis 6153 wireless VP2 with 24 hr fan aspirated radiation shield, WMR968, Boltek Stormtracker PCI, Hamtronics R139, stacked Woodhouse 6X6 beams on Yaesu G-5500 az/el rotator Software: Weatherlink, VWS, Image Salsa, Lightning/2000, GRLevel3 with Allison House data feed, WxtoImg |
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Garth Bock
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« Reply #2 on: November 07, 2008, 05:05:07 PM » |
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Thanks so much ! I want to eliminate it as the real failure of the battery. Davis said the battery would last 8 months so if it failed again it would be in the summer. Not my idea of full diagnostics. Before the snow flies I want to make sure the ISS is fault free. I don't want to send one of our union guys up on the lift in the middle of winter. That wouldn't go over well......
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Davis VPro2,VWS,WF,VVP,WD,WDL,Cumulus,WV32 |
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talbert1952
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« Reply #3 on: November 08, 2008, 05:33:51 PM » |
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If the super capacitor is bad a new CR123 battery will last a few days at best. The bad capacitor kills the battery. You can get a replacement super capacitor from Digikey. http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=589-1002-ND |
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Tom W4SNA IRLP 4069 - Echolink W4SNA-R http://tobaccovilleweather.com/Hardware: Davis 6153 wireless VP2 with 24 hr fan aspirated radiation shield, WMR968, Boltek Stormtracker PCI, Hamtronics R139, stacked Woodhouse 6X6 beams on Yaesu G-5500 az/el rotator Software: Weatherlink, VWS, Image Salsa, Lightning/2000, GRLevel3 with Allison House data feed, WxtoImg |
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92merc
BismarckWeather.net
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« Reply #4 on: November 09, 2008, 12:52:39 PM » |
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Is that a VP2? Reason I ask is my VP1 has a disc shaped cap instead of the can one. Anyone know where you can get those?
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talbert1952
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« Reply #5 on: November 09, 2008, 03:54:11 PM » |
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Is that a VP2? Reason I ask is my VP1 has a disc shaped cap instead of the can one. Anyone know where you can get those?
Yes it is a VP2. Does your capacitor have any markings? The value, voltage rating and manufacturer would be very helpful for finding an exact replacement. |
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Tom W4SNA IRLP 4069 - Echolink W4SNA-R http://tobaccovilleweather.com/Hardware: Davis 6153 wireless VP2 with 24 hr fan aspirated radiation shield, WMR968, Boltek Stormtracker PCI, Hamtronics R139, stacked Woodhouse 6X6 beams on Yaesu G-5500 az/el rotator Software: Weatherlink, VWS, Image Salsa, Lightning/2000, GRLevel3 with Allison House data feed, WxtoImg |
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Garth Bock
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« Reply #6 on: November 10, 2008, 03:01:02 PM » |
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Super cap had leaked. Ordered a new one and a new lithium. Thanks for everyone's help ! |
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92merc
BismarckWeather.net
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« Reply #7 on: November 11, 2008, 09:26:02 AM » |
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Mine shows 5.5v and 1.0F.
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talbert1952
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« Reply #8 on: November 11, 2008, 07:57:00 PM » |
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Tom W4SNA IRLP 4069 - Echolink W4SNA-R http://tobaccovilleweather.com/Hardware: Davis 6153 wireless VP2 with 24 hr fan aspirated radiation shield, WMR968, Boltek Stormtracker PCI, Hamtronics R139, stacked Woodhouse 6X6 beams on Yaesu G-5500 az/el rotator Software: Weatherlink, VWS, Image Salsa, Lightning/2000, GRLevel3 with Allison House data feed, WxtoImg |
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92merc
BismarckWeather.net
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« Reply #9 on: November 12, 2008, 09:15:02 AM » |
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Looks like the one for the VP1 is on page 1545, top left. Panasonic SG Series Gold Capacitors. Electric Double Layer Capacitors. Vertical Mount. 5.5V 1F
DigiKey PN P6975-ND
Panasonic PN EEC-S5R5V105
$4.82 for one
$3.84 in a lot of 10
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