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30 A (low amps) Current Clamp


pc oscilloscope, data acquisition and automotive diagnostics from Pico Technology



The TA234 probe is a 30 A current clamp. The extended measuring jaws allow measurement in a confined space. When measuring DC, a simple thumbwheel on the probe allows zero adjustment.

This current clamp is ideally suited for use with PicoScope oscilloscopes and features additional screening to reduce noise pickup.



Electrical data
Nominal current 30 A AC peak  or DC
Measuring range (s)  30 mA to 30 A DC (accurate)
5 mA to 30 A DC (usable)
Overload capacity 500 A for 60 s
Output sensitivity  100 mV/A
Accuracy ±(2% of reading ± 2 mA)
Resolution ± 1 mA DC after filtering
di/dt tracking capability > 20 A/µs
Conductor position sensitivity ± 1% relative to center
Temperature coefficient 0.1 x specified accuracy/°C
(0 °C to 18 °C, 28 °C to 50 °C)
Frequency range DC to 20 kHz (–0.5 dB)
Battery type 9 V PP3, MN 1604, 6F22, 6LR61
Min. load impedance 1 MΩ
General data
Max. conductor size 19 mm diameter
Output cable and connectors 2 m long coax terminated with safety BNC connector
Operating temperature 5 °C to 40 °C
Storage temperature (excluding battery) –20°C to 70°C
Humidity 0 to 80 %RH
Altitude 0 to 2000 m
Weight  300 g
Dimensions (H x W x D) 200 mm x 72 mm x 38 mm
Pollution degree 2
Safety EN 61010-1:2010
EN 61010-2-032:2012
EMC EN 61326-1:2006
EN 61326-2-2:2006
Environmental RoHS and WEEE compliant


Typical Uses

With a 20 mm extended jaw the TA234 low amps current clamp is ideal for parasitic drain measurements without the need for battery cable disconnection. The clamp also boasts extreme accuracy from 5 mA through to 30 A DC with reduced noise levels so ensuring greater resolution for very low current applications, including:

Parasitic drain measurements
Petrol and diesel injector operation
Solenoid testing
Throttle motor functions
EGR actuator testing
Broadband 02 sensor testing (in conjunction with current multiplier) 


Title Language Issue Size Updated
30 A Current Clamp User’s Guide English 2 133 KB Jun 09 2015


Accessories for the 30 A (low amps) current clamp

Product   Order
Foam tray for 2 current clamps PA108

USA Office

Address: 1480 Gulf Road, Suite 837,
PO Box 1364
Point Roberts, WA 98281

Western Canada - Vancouver BC

Tel:1.800.663.6001 or 1.604.925.6150
Address: 2454 Haywood Ave
West Vancouver, BC V7V 1Y1

Eastern Canada - Markham, Ontario

Tel:1.800.465.0164 or 1.905.513.7027