bit of a novice to multimeters but I have a few laptop power adapters that I want to test to see if they are any good.
I actually have two multimeter, a clarkes CDM 10A and I also have a Mastech MAS-343 Auto-range.
On the premise of keeping it as simple as possible I opted for the Clarke and set it to 600v to test the kettle cable, then 20v to test the 19.5v block, the kettle cable gave out a reading of 243v the block connected to the kettle gave a reading of between 19.38v and 19.4v
Does this indicate a faulty charger or is this within an acceptable tolerance?
I have seen videos on such as Youtube that show you how to test stuff but they never appear to show you what is not an acceptable reading, e.g. they showed the charger to give readings of 19.53v indicating a good charger.
Also I can't seem to find a decent book or online reference to using multimeters so if you know of any I'd be grateful if you could let me know.
Forever learning
TIA
I actually have two multimeter, a clarkes CDM 10A and I also have a Mastech MAS-343 Auto-range.
On the premise of keeping it as simple as possible I opted for the Clarke and set it to 600v to test the kettle cable, then 20v to test the 19.5v block, the kettle cable gave out a reading of 243v the block connected to the kettle gave a reading of between 19.38v and 19.4v
Does this indicate a faulty charger or is this within an acceptable tolerance?
I have seen videos on such as Youtube that show you how to test stuff but they never appear to show you what is not an acceptable reading, e.g. they showed the charger to give readings of 19.53v indicating a good charger.
Also I can't seem to find a decent book or online reference to using multimeters so if you know of any I'd be grateful if you could let me know.
Forever learning
TIA