The F404T from Chauvin Arnoux is a high-performance AC/DC multi-purpose current clamp designed for the safe testing, maintenance, and diagnosis of photovoltaic systems. A particular focus is on reliably verifying the absence of DC current in module strings. To this end, the device features a patented Autocheck function that allows users to verify the proper operation of the current clamp before performing any work.
In addition to measuring DC and AC currents as well as DC and AC voltages, the F404T is suitable for testing frequency, resistance, continuity, diodes, and temperature. The included Type K thermocouple, for example, enables spot temperature measurements on the back of photovoltaic modules. This allows the clamp meter to be used both for safety checks prior to maintenance work and for monitoring an operational PV system.
The fast 12-bit TRMS digital measurement method enables precise measurements even with varying signal waveforms. Additional analysis functions such as Min/Max, ΔREL, and True Inrush support the diagnosis of overcurrents, motor starting currents, and load profiles. Automatic AC/DC detection, the easy-to-grip rotary switch, and the design optimized for one-handed operation make it easy to use in the field—even while wearing protective gloves.
For professional field use, the F404T offers electrical safety up to 1000 V CAT IV or 1500 V CAT III, an IP54 protection rating, and a rugged design that passes a standard drop test from a height of two meters.
Product Features:
- Display: Backlit LCD
- Resolution: 10,000 digits
- Displayed measurement values: 1
- Measurement method: AC/DC TRMS, 12-bit
- Range selection: automatic (autorange)
- AC/DC detection: automatic for current and voltage measurements
- AC current measurement range: 0.25 to 1,000 A, up to 1,500 A peak
- DC current measurement range: 0.25 to 1500 A
- Best current measurement accuracy: 1% of the displayed value ± 3 digits
- AC voltage measurement range: 0.15 to 1200 V, up to 1700 V peak
- DC voltage measurement range: 0.15 to 1700 V
- Best voltage measurement accuracy: 1% of the displayed value ± 3 digits
- Frequency range for current: 5.0 Hz to 2000 Hz
- Frequency range for voltage: 5.0 Hz to 20.00 kHz
- Resistance measurement range: 0.1 Ω to 99.99 kΩ
- Open-circuit voltage during resistance measurement: ≤ 3.6 V
- Measurement current for resistance measurement: ≤ 550 µA
- Acoustic continuity test: Threshold adjustable between 1 and 999 Ω
- Diode test: Available
- Temperature measurement: Type K thermocouple
- Temperature range: −60.0 °C to +1000 °C or −76.0 °F to +1832 °F
- Adapter function: available
- DC self-test/autocheck: available
- True inrush: Measurement of inrush currents, motor starting current, and load profile
- Min/Max function: available, sampling time 100 ms
- Relative measurement functions: ΔREL and ΔREL/R
- Automatic shutdown: available
- Electrical safety: IEC/EN 61010-2-032, 1000 V CAT IV / 1500 V CAT III
- Protection class: IP54 according to IEC 60529
- Enclosure diameter: 48 mm
- Dimensions: 92 × 272 × 41 mm
- Weight: 600 g
- Power supply: 4 × 1.5-V AA batteries
- Part number: P01120948