Fluke 325 True-RMS Clamp Meter with Temperature

325 400 A AC/DC clamp meter with temperature explained

The Fluke 325 True-RMS Clamp Meter (325) is a true-RMS clamp meter that measures AC and DC current to 400 A, voltage to 600 V, resistance, capacitance, frequency and contact temperature with the included thermocouple. Seven Star LLC supplies 325 in Oman and the GCC as an independent supplier in Muscat, not affiliated with the manufacturer.

The 325 builds on the 323 with DC current and extra functions. The table decodes its headline data.

325 technical specifications

Data are from the manufacturer product page for the Fluke 325.

How the Fluke 325 True-RMS Clamp Meter works

The jaw senses AC current by induction and DC current by a Hall-type principle, so a single instrument reads both without breaking the circuit. True-RMS conversion handles non-linear AC loads.

Test leads provide voltage, resistance and capacitance, and the thermocouple port gives contact temperature. Min/Max records peaks and dips, and the backlight helps in dim cabinets.

Key features

• AC and DC current to 400 A
• True-RMS AC
• Temperature with included K-type thermocouple
• Frequency to 500 Hz
• Min/Max and backlight

Where 325 fits and related Fluke models

The 325 fills the middle of the 320 line: more than the 323 and without the wireless or iFlex features of the 374 FC and 375 FC. The 902 FC is the HVAC variant with microamps and wireless.

For currents above 400 A, choose the 355 or a clamp with iFlex.

Selection checklist for 325

Confirm the following points before ordering, so that the instrument matches the work and the safety rules of your site.

• Need for DC current: the 325 is the entry model that provides it.
• Temperature requirement.
• Conductor size limit 30 mm.
• Soft case and test leads are included.

Safe use, care and maintenance of 325

• Close the jaw fully and check that the faces are clean. Dirt or rust on the jaw faces causes reading errors, and a jaw that does not close completely should be taken out of service.
• Clamp only one conductor at a time. Two conductors of a single-phase pair or a three-phase set cancel each other and the 325 will show a value close to zero.
• Verify the clamp on a known live circuit before and after any test that decides whether equipment is safe to touch.
• Replace batteries when the low-battery indicator appears and remove them for long storage. Inspect the test leads for damage before each use of the voltage and resistance functions.
• Keep the jaw and display free of dust. In dusty Gulf sites, use the supplied case and wipe the instrument after switchgear room work.
• Respect the maximum conductor size and never clamp bare busbars unless the rating and your site procedure allow it. Treat the clamp as a measuring tool, not a switch or an isolator.
• Allow the instrument to reach ambient temperature after moving it from an air-conditioned vehicle into a hot plant area, so that condensation does not form inside the housing and the display settles.
• Schedule periodic calibration through your quality system, and keep the certificate with the instrument record so that readings used for reports remain traceable.

Typical applications of 325 in Oman and the GCC

Clamp meters are used for load checks on motors, feeders, chillers and pump drives. In Oman, maintenance teams at oil and gas plants, power and water utilities, desalination units and petrochemical sites use them for current surveys without opening circuits. A clamp reading showing a motor drawing more than its nameplate current points to a mechanical overload, a supply imbalance or a failing winding, while a reading near zero on a running pump suggests a lost phase or dry running. Because the circuit stays intact, these checks can be done on live equipment under a permit, which keeps downtime low during the hot summer months when cooling and pumping loads peak.

The 325 is a practical choice for DC drive and battery-charger checks, motor load surveys and HVAC checks in Oman facilities, where one instrument should cover voltage, current and a quick temperature read.

325 compared with nearby models

The 374 FC extends range and adds wireless connectivity.

Information to send with an RFQ for 325

To prepare an accurate quotation, please send:

• Exact model 325 and the quantity required.
• Maximum conductor size and expected current, so the jaw or flexible probe option can be confirmed.
• Whether wireless or smartphone use is needed on site.
• Any extra accessories such as a hanging strap, leads or a case.
• Calibration traceability paperwork if required on delivery.
• Delivery point in Oman or elsewhere in the GCC and the required date.

Storage, handling and spares for the Fluke 325

Store the Fluke 325 in its case or holster with the test leads disconnected. Remove the batteries if the meter will not be used for several weeks, because leaking cells can damage the battery contacts. In Oman and the GCC, do not leave the instrument in a parked vehicle during summer, where cabin temperature can go well above the storage limit in the user manual.

• Inspect test leads, probes and clamps before each use and replace any lead with damaged insulation or exposed metal.
• Use only leads and accessories rated for the same or a higher measurement category than the work you do.
• Keep spare fuses of the exact type given in the manual; a wrong fuse removes the protection the meter is built with.
• Plan a regular calibration interval, often twelve months, and keep the certificate with the instrument records.

If your team uses several units of the Fluke 325, it is useful to order spare test leads and batteries in the same RFQ, so that a meter is not taken out of service for a simple accessory.

Documents and quotation

Send the part number 325 and we will confirm which manufacturer documents are available for this model.

For a quotation, send the part number 325, the quantity and your delivery location in Oman or the GCC through the RFQ button on this page. Availability and lead time are confirmed per request.