Handheld Oscilloscopes ?
#1
#2
I have not used one but, for the money I think they would be a good diagnostic tool. Looking at the specs I would be inclined to go for the cheaper DS201 as the specs are almost the same. Looking at the units the 203 seems to have easier controls but is 3 times the price. The specs do not include the input capacitance and 500K Ω is on the low side, I would buy a 10X probe.
I will explain the 500kΩ thingy. If you measure a wave that is supposed to be 12V p-p (peak to peak) across 250KΩ the voltage the scope displays will be 8V p-p not 12V as expected. This is because the voltage is divided between the 2 resistances. A 10X probe will multiply the Scopes input impedance by 10. This will result in the measured voltage being 11.4V p-p close enough to 12V
Let me put it this way if these were available when I was installing GM electronic cruise control in my XJS I would have bought one. I have a Tektronix TDS3000 a highend digital which is a great scope but I could not drive the car down the road with this scope.
I hope this helps.
I will explain the 500kΩ thingy. If you measure a wave that is supposed to be 12V p-p (peak to peak) across 250KΩ the voltage the scope displays will be 8V p-p not 12V as expected. This is because the voltage is divided between the 2 resistances. A 10X probe will multiply the Scopes input impedance by 10. This will result in the measured voltage being 11.4V p-p close enough to 12V
Let me put it this way if these were available when I was installing GM electronic cruise control in my XJS I would have bought one. I have a Tektronix TDS3000 a highend digital which is a great scope but I could not drive the car down the road with this scope.
I hope this helps.
#3
#4
I'd go with a 2ch, in 35 years I never needed 4ch. 2ch is handy to view input and output waveforms
Something like this
https://www.ebay.com.au/itm/Small-Po...FJqf:rk:1:pf:0
Something like this
https://www.ebay.com.au/itm/Small-Po...FJqf:rk:1:pf:0
#5
I hadn't seen the 212.
Some reviews didn't like the 202 but the 212 reviews seem to be pretty good.
I like the 2 channel for comparing signals as well as checking input vs output like crank sensor / cam timing.
The total cost goes up pretty quick when you start adding the cost of an amp clamp, Inductive clamp, probes, etc.
Some reviews didn't like the 202 but the 212 reviews seem to be pretty good.
I like the 2 channel for comparing signals as well as checking input vs output like crank sensor / cam timing.
The total cost goes up pretty quick when you start adding the cost of an amp clamp, Inductive clamp, probes, etc.
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04-20-2017 06:37 PM
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