Fluke325 Clamp Multimeter AC-DC TRMS

Q: What is the smallest ac and dc current you can measure? Is the dc measurement small enough to hunt down parasitic battery drains in a 12v car?

You need to look at both resolution (0.01A on 40A setting) and accuracy. For example, if you try to measure a 50 mA current... ±(%2 reading ±5 digits) from the manual 50 mA = 0.05 A >> accuracy is ±(1 mA ±5 digits) >> 50 mA ±50 mA !!! Remember, those ±5 digits mean ±50 mA, because the smallest digit represents 0.01A. And that means that you can see a value of 0.00 to 0.10 A when you measure 0.05A (50 mA). Choose meter 10X needed resolution. Here, res = 0.01A, so use for measurements > 0.1 A. But if all you need is a rough measurement, such as finding that a parasitic current is more than 100 mA, but you don't care what the exact value is, then this will work fine. But if you are trying to find if the idle current is 50 or 100 mA, this might not be a good choice.

Q: The Fluke 325 spec sheet shows current range as 40A - 400A for both AC and DC. How do you switch the meter from 40A range to 400A range?

Stephen, you peaked my curiosity so went looking on the Fluke site. It was worthless so got out the unit and tried it on a DC telephone line from a hydronic zone valve to the water heater and it measured .46 amps (probably in milliamps) on the meter. Then switched it to the AC line and clamped around a line leading to a 500-watt work light and it measured .05 amps (which should have been no more than 15A. I think the difference has to do with the base as the DC amps should certainly be less than the AC amps. Anyway it does measure but had to learn how to use it.

Q: DOES THIS TESTER TEST DC AMPS

Yes it will. Unfortunately if you are used to the great 337 that had their own switch positions this one you have to learn to push the "zero" button to put it into the DC mode. It is the same with AC and DC volts. Button must be pushed to change to DC. Hope this helps. WW

Q: does this measure as little as 5 amps dc?

Yes it will read as little as .01 amp dc

4.7/5

Product ID: 258600810

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Details

Brand
Fluke
Power source
Battery
Style
Standard
Colour
jaune
Item weight
300 Grams

⚡400A AC current max

📏30mm jaw opening

🔋600V AC/DC voltage range

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Fluke 325 Clamp Multimeter AC-DC TRMS

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Description

⚡ Clamp it, measure it, master it — the pro’s choice for flawless diagnostics!

SAFETY FIRST - Certified to IEC 61010 standards for professional-grade reliability.
NON INTRUSIVE DESIGN - 30mm jaw opening lets you measure current safely without disconnecting wires.
VERSATILE VOLTAGE RANGE - Measures AC/DC voltage up to 600 volts for diverse applications.
POWERFUL CURRENT DETECTION - Clamp up to 400 amps AC without breaking the circuit.
PRECISION IN EVERY MEASUREMENT - True RMS sensing ensures accuracy on all waveforms, linear or nonlinear.

The Fluke 325 Clamp Multimeter is a rugged, True RMS digital meter designed for professionals needing precise AC/DC current and voltage measurements up to 400 amps and 600 volts. Its 30mm jaw allows safe, non-contact current measurement, while built-in continuity testing and IEC 61010 safety certification make it a reliable tool for complex electrical troubleshooting.