Pico Technology TA325 30/300/3000A AC 3-Phase Flex Current Probe, BNC Connector
The Pico Technology TA325 is a 3-phase AC current probe utilizing 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 probes provide a 3 V full-scale AC output proportional to the current being measured with three selectable ranges: 30 A, 300 A and 3000 A.
When using the TA325 with a PicoScope 4444 differential scope, ensure that you purchase three TA271 D9-BNC adaptors.
| 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 A |
| Minimum 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 | 1000 hours typical (TA325) 2000 hours typical (TA326) |
| External power | Via 2.1 mm (0.08") mini power connector |
| Low battery | Indicated by an orange LED |
| Overload | Indicated by a red LED |
| Enclosure | |
| 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 | |
| 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 |
| General characteristics | |
| 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 |
| 1000 V RMS CAT III, 600 V RMS CAT IV | |
| Pollution Degree 2 (probe and integrator) | |
| 30 V maximum between output and ground | |
| RoHS and WEEE compliant | |
| Rated for continuous use | |
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