Frequency setting on some Multimeters

[caphair]

Can they be used to see if there's a pulse coming out of driver ics on power supplies to determine if they're at least sending something to the transistors?

[budm]

Re: Frequency setting on some Multimeters

Do you mean Frequency counter function?
If your meter has Good ACV mode with high frequency bandwidth (meaning it can measure High frequency AC in KHZ range not in typical 50/60Hz range) then you may be able to use it to see if the drive circuit has activity.

[caphair]

Re: Frequency setting on some Multimeters

A meter like this

[budm]

Re: Frequency setting on some Multimeters

What is the brand and the spec of this meter? So it has frequency counter function (Hz).

[caphair]

Re: Frequency setting on some Multimeters

Here's an Amazon link to it:

http://www.amazon.com/AideTek-VC97-M.../dp/B008GTEZPI

[budm]

Re: Frequency setting on some Multimeters

2.3 ACV
Range Accuracy Resolution
400mV ±(1.5%+6d) 0.1mV
4V ±(0.8%+6d) 1 mV
40V 10 mV
400V 100 mV
750V ±(1.0%+6) 1V
Input impedance: 400mv range>40MΩ,other range is 10MΩ.
Overload protection: 1000V DC or 700V AC peak value
Frequency response: 750V range: 40~100Hz, other range: 40~400Hz

2.8 FREQUENCY
Range Accuracy Resolution
10Hz ±(0.5%+4) 0.001Hz
100Hz 0.01Hz
1000Hz 0.1Hz
10kHz 1Hz
100kHz 10Hz
1MHz 100Hz
30MHz 1kHz
INPUT SENSOR：0.7V。
Overload protection: 250V DC/AC peak value

So the frequency counter can go up to 30MHz per spec (true or not I am not sure), so try looking at some continuous active signals to see what you see on the screen, It looks like minimum signal level required is 700mV.