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The TA326 is an AC current probe utilising the Rogowski coil principle, used to measure AC current up to 3000 A when used with oscilloscopes, recorders or data loggers.
The flexible probe allows current measurements on hard-to-reach conductors.
Rogowski coil technology has a couple of advantages over CT (current transformer) technology: when measuring multiple phases, the phase difference is small and predictable for higher frequency harmonic analysis applications; also, Rogowski coils do not have magnetic materials to saturate and so have excellent linearity.
The probe has three user selectable ranges; 30 A, 300 A and 3000 A.
The probes provide a 3 V full-scale AC output proportional to the current being measured with three selectable ranges.
If the TA326 is intended for use with a PicoScope 4444 differential scope, ensure a TA271 D9-BNC adaptor is also purchased.
TA325 and TA326 flex current probe specifications
Measuring ranges: 30 A / 300 A / 3000 A AC
Output sensitivity (AC coupled): 100 mV / 10 mV / 1 mV per A
Accuracy (45 to 65 Hz): ±1% of reading ±0.1 A 30 / 300 A, ±1% of reading ±1 A 3000 AMinimum load 100 kΩ for specified accuracy
Frequency range: 10 Hz to 20 kHz (-1 dB)
Phase (45 to 65 Hz): < ±1°
Position sensitivity: ±2% of reading
External field: ±0.25% of range with cable > 100 mm from the probe
Noise: 80 mA RMS 30 A, 400 mA RMS 300 A / 3000 A
Temperature coefficient: ±0.1 % /°C
Power supply: Two AA MN1500 LR6 alkaline batteries or an external power supply (+3 V / 100 mA)
Battery life: 2000 hours typical
External power: Via 2.1 mm (0.08") mini power connector
Low battery: Indicated by an orange LED
Overload: Indicated by a red LED
Material: ARNITE T06-200SNF, UL94 V0
Degree of protection: IP40
Dimensions: 110 (L) x 65 (W) x 23 (D) mm
Output connection: 0.5 m coax cable with 3 shrouded BNC connectors
Probe length: 610 mm (24"), double-insulated
Probe diameter: 9.9 mm (0.39")
Output cable: 2 m (78.7"), probe to integrator
Material: Alcryn 2070 NC, LATI LATENE 7H2W V0
Degree of protection: IP65
Operating temperature: -20 °C to +65 °C (-4 °F to +149 °F)
Storage temperature: -40 °C to +75 °C (-40 °F to +167 °F)
Operating humidity 15% to 85% (non-condensing)
Safety standards: EN 61010-1, EN 61010-2-032
EMC: EN 61326-2-2