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Digital Multi-Meter to measure pulse of a flowmeter
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xstarlogic:
Hello all,

I need to measure the frequency emitted by the flowmeter. The flowmeter transmits data  0 to 12kHz with an amplitude of 17 DC Volt.

I have been looking into some digital multi-meter reviews. Most do not have a review regarding on frequency reading. If some frequency reading is included in the review, all use sinusoidal waveform of AC power source.

I do not want to use an oscilloscope, which will be more expensive. For safety reason, I wanted to carry less stuff climbing to 10 meter or above. and most instrument are using 4-20 DCmA, so it will be troublesome to carry lots of things while climbing up.

I've been looking at some low budget multi-meter brand available in my country, such as ANENG and ZOYI. Brymen is not available, UNI-T is available but most are expensive. Fluke is not my best choice. I am currently looking at ZOYI-102L but have no idea will the frequency work for 17 DCV.

I am newbie to electrical frequency, please provide me with basic explanation.

Many thanks to all
HKJ:
Check my reviews, I do test the frequency input on DMM's:

Generally meters is not designed for sinus waveforms, but for square wave. If the amplitude of the sinus is large enough it will be counted.
HKJ:
If you want to count the actual number of pulses, you have a problem. Very few meters can do that, I only know of some Gossen, but they are very expensive.
Phil1977:
Is the FNIRSI SG003 / SG004 in your budget range? These are low-cost process calibrators, so their main functionality is generating signals. But they also have a quite good input side with frequency and PWM display.

They also allow you to choose between logic signal or open collector detection - that´s a feature I´ve never seen at any DMM or frequency counter.

And they´re small - perfect for field use.
xstarlogic:

--- Quote ---Check my reviews, I do test the frequency input on DMM's:

Generally meters is not designed for sinus waveforms, but for square wave. If the amplitude of the sinus is large enough it will be counted.
--- End quote ---

Where to see your review? I'm still new around here, and may get lost very easy.

I think pulse produced by flowmeter is a square waveform as they are intercepted by DI module of PLC.


--- Quote ---Is the FNIRSI SG003 / SG004 in your budget range? These are low-cost process calibrators, so their main functionality is generating signals. But they also have a quite good input side with frequency and PWM display.

They also allow you to choose between logic signal or open collector detection - that´s a feature I´ve never seen at any DMM or frequency counter.

And they´re small - perfect for field use.
--- End quote ---

No, I'm not looking for calibrator or generator. Please read my question carefully.
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