Rugged & Compact, Essential Equipment for
Professional Electricians: Measure Current and Voltage
with a Single Instrument

Hioki clamp meters are best-in-class measuring devices incorporating Hioki’ s expertise in current sensing technology. The 3280-10F is an average rectifying 1000A AC clamp meter that features a broad operating temperature range of -25°C to 65°C, thin and compact clamp core and optional flexible current sensor that you can attach to let you get into the tightest spots.

CAT IV 300 V (Current)
CAT III 600 V (Current)
CAT III 300 V (Voltage)
CAT II 600 V (Voltage)

Key Features
• Measure the fundamental waveform component using the average rectified method
• Expanded -25 °C to 65 °C operating temperature range
• Connect the CT6280 flexible sensor to measure up to 4199 A in thick or paired wires
• Drop proof design withstands drop from a height of 1 meter

Model No. (Order Code)

3280-10F Average rectified
3280-70F3280-10F, CT6280 bundled model
Note: The 3280-70F includes both the meter and an AC Flexible Current Sensor.
1: AC CLAMP METER 3280-10F×1

Using 3280 series AC clamp meters: Introduction to functionality and measurement methods

In addition to AC current measurement, these clamp meters provide voltage and resistance measurement as well as continuity check functionality. Their compact size, low-profile design, and resistance to both rough handling and extreme temperatures make them essential tools for any electrician.

Using 3280 series AC clamp meters: Difference between mean value and true RMS measurement

Measurements taken with the Hioki 3280-10F (which uses the mean value method) and the the Hioki 3280-20F (which uses the true RMS method) are compared. Observe the difference between readings from these two types of instruments when measuring a distorted waveform that contains harmonic components such as those produced by inverters and switching power supplies.

A pocket clamp meter that can use flexible sensors

When connected to an optional flexible current sensor, the 3280-10F can be used to measure the current flowing in pairs of wires or in tangled or complexly routed wires around which it was not possible to apply a clamp-on sensor in the past.

Essential for electrical work: A thin card tester that fits in the pocket with all the capabilities of a clamp meter

The 3280-10F delivers all the functionality of a clamp meter and card tester in the form factor of the latter. In addition to current measurement, this single instrument delivers voltage measurement, continuity check, and resistance measurement functionality.

Rugged, portable design that’s drop-resistant

The 3280-10F inherits the drop-proof durability of the previous 3280-10 (making it able to withstand being dropped onto concrete from a height of 1 m) and expands that instrument’s operating temperature range to -25°C to 65°C (from the previous 0°C to 40°C). As a result, it can be used in even harsher environments.