You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Message

Something about the Simpson 269 (the one on the right side of the pic) that users should be very careful of...

Notice that there's a position labeled "OPEN" right near the top of the range indicator. When the switch is in that position, there is literally an open circuit across the meter coil. That may not be so bad if the meter remains on the workbench, but for proper damping of the movement, there should be a very LOW resistance across the coil when the meter is being moved around. It's similar to how a DC generator behaves without a load attached. Remember the generator for the headlight on a bicycle?

I leave my 269 and all my other analog VOMs in the highest DC AMPS range that passes current through the switch. Saves a LOT of wear and tear on the movement.

[QUOTE="Beetle, post: 433048, member: 1066"] Something about the Simpson 269 (the one on the right side of the pic) that users should be very careful of... Notice that there's a position labeled "OPEN" right near the top of the range indicator. When the switch is in that position, there is literally an open circuit across the meter coil. That may not be so bad if the meter remains on the workbench, but for proper damping of the movement, there should be a very LOW resistance across the coil when the meter is being moved around. It's similar to how a DC generator behaves without a load attached. Remember the generator for the headlight on a bicycle? I leave my 269 and all my other analog VOMs in the highest DC AMPS range that passes current through the switch. Saves a LOT of wear and tear on the movement. [/QUOTE]

Top Bottom