High pressure sodium fixture

[Big Al]

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

[buffalobill]

from buffalo ny: sometimes when the starter circuit fails in a 110v hps

35 watt light we can screw > Was trying to figure out why my dusk to dawn light quit. Jumped the light

[Mark Schofield]

[hallerb]

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

[Joseph Meehan]

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

[Big Al]

Then I better follow the other poster's advice and get an auto ranging meter:) (And a 100 to 1 divider probe.)

Thanks,

Al

[Bud--]

HPS has a starter to provide a narrow high voltage spike to initiate the arc. I don't think you want to measure it.

bud--