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The TA326 is an 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.
If the TA326 is intended for use with a PicoScope 4444 differential scope, ensure that you also purchase a TA271 D9-BNC adaptor. This can be found under the Accessories tab on this page.
Title | Language | Issue | Size | Updated | All products | All languages | All documents | Status |
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TA325/TA326 AC current probes user’s guide | English Français Deutsch Italiano Español |
1 | 2 MB | Jan 18 2017 | English Français Deutsch Italiano Español |
open | ||
TA325 and TA326 Flex Current Probes EU Declaration of Conformity | English | 1 | 291 KB | Mar 30 2017 | English | open |
Product | Price | Quantity |
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TA325 and TA326 flex current probe specifications | |
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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 a shrouded BNC connector |
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 |