High pressure sodium fixture

Posted by Big Al on February 5, 2006, 1:27 am

Was trying to figure out why my dusk to dawn light quit. Jumped the light
sensor and I could hear a slight buzz coming from the fixture. Unscrewed the
70 Watt lamp and put my DVM across the socket. Found out there is a heck of
a lot of voltage there. The DVM made an arcing sound and quit. Display still
comes on but no readings. Opened it and found the fuse blown. Thought that
was it, but the meter is shot. How much voltage is in that socket anyway?

Al

Posted by buffalobill on February 5, 2006, 3:50 am

from buffalo ny: sometimes when the starter circuit fails in a 110v hps
35 watt light we can screw in a 110v regular incandescent bulb and it
lights. subject to your socket size may need a mogul to standard
adapter. an hps bulb will not light up in a standard socket.

Big Al wrote:

> Was trying to figure out why my dusk to dawn light quit. Jumped the light
> sensor and I could hear a slight buzz coming from the fixture. Unscrewed the
> 70 Watt lamp and put my DVM across the socket. Found out there is a heck of
> a lot of voltage there. The DVM made an arcing sound and quit. Display still
> comes on but no readings. Opened it and found the fuse blown. Thought that
> was it, but the meter is shot. How much voltage is in that socket anyway?
>
> Al

Posted by Mark Schofield on February 5, 2006, 8:08 am

if you screw a regular 110 incandescent (it's a 110 fixture ?) bulb in and
it lights, then the ballast is at fault

> Was trying to figure out why my dusk to dawn light quit. Jumped the light
> sensor and I could hear a slight buzz coming from the fixture. Unscrewed
> the
> 70 Watt lamp and put my DVM across the socket. Found out there is a heck
> of
> a lot of voltage there. The DVM made an arcing sound and quit. Display
> still
> comes on but no readings. Opened it and found the fuse blown. Thought that
> was it, but the meter is shot. How much voltage is in that socket anyway?
> Al

Posted by hallerb@aol.com on February 5, 2006, 8:58 am

So you need a new ballast, bulb, and meter:(

Your probably better off buying a whole new fixture, and meter with
auto volt detect.

it sets the meter to the range needed, no more blown meters

Posted by Joseph Meehan on February 5, 2006, 9:38 am

Big Al wrote:

> Was trying to figure out why my dusk to dawn light quit. Jumped the
> light sensor and I could hear a slight buzz coming from the fixture.
> Unscrewed the 70 Watt lamp and put my DVM across the socket. Found
> out there is a heck of a lot of voltage there. The DVM made an arcing
> sound and quit. Display still comes on but no readings. Opened it and
> found the fuse blown. Thought that was it, but the meter is shot. How
> much voltage is in that socket anyway?
> Al

Peek voltage necessary for starting
High pressure sodium 35-100 watts: 2500 volts!
High pressure sodium 150-1000 watts: 4000 volts!

--
Joseph Meehan

Dia duit

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