Products > Test Equipment
Continuity Tester
Gyro:
As far as I can find, the AN9250A has a continuity threshold of 30R +/- 10R. Lower than many but still well a bit short of the 1R threshold that the OP is requesting.
I think it It comes down to low cost easy home construction or paying out more to build something with a display like the Shorty (not sure off-hand if this is available as a kit / ready built).
Mine is a variation on the theme of the EPE article wheatstone bridge design which achieves fast audible indication, 1R / 1M threshold and decent input protection (that can be uprated as required). Unlike the Leo design, it doesn't turn on semiconductor junctions (<300mV open circuit), I find this desirable but others may differ.
Fungus:
--- Quote from: Gyro on July 24, 2023, 06:21:26 pm ---As far as I can find, the AN9250A has a continuity threshold of 30R +/- 10R. Lower than many but still well a bit short of the 1R threshold that the OP is requesting.
--- End quote ---
I measured mine at 49 Ohms.
I don't know anything that will go as low as 1 Ohm. 1 Ohm is the leads and contacts.
Gyro:
Yes, you do need to tweak the threshold slightly to accomodate lead resistance etc. It is doable though - my tester will trigger probing a 1R resistor but not a 1R2. Not bad for 2 wire.
KungFuJosh:
--- Quote from: Gyro on July 24, 2023, 08:32:52 pm ---Yes, you do need to tweak the threshold slightly to accomodate lead resistance etc. It is doable though - my tester will trigger probing a 1R resistor but not a 1R2. Not bad for 2 wire.
--- End quote ---
What's the point of the 1MΩ range? Is that for checking bad insulation or something?
Gyro:
Exactly that, contamination on PCBs etc.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version