PICO TA138 Operating Instructions Manual

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TA138 200 A AC Current Clamp

OPERATING INSTRUCTIONS

Introduction

The TA138 200 A AC Current Clamp has a voltage output with standard banana
(4 mm) plugs for connection to the PicoLog CM3 Current Data Logger or other
compatible measuring instrument.

Using the Current Clamp Safely

Warning: To prevent electric shock or re and personal injury, carefully read

all safety information before attempting to operate the Current Clamp and

follow these procedures:

• DO NOT use the clamp on circuits rated higher than 600 V in Category II
or 300 V in Category III. Use caution when clamping around uninsulated

conductors or bus bars.

• DO NOT use a clamp that is cracked, damaged, or has a defective cable.
Such clamps should be made inoperative by taping the jaws closed.

• DO check the magnetic mating surfaces of the clamp jaws. They should be
free of dust, dirt, rust and other foreign matter.

• DO keep your ngers behind the safety barrier as shown below.

Safety Symbols

This symbol, adjacent to another symbol or terminal, indicates that

the user must refer to the manual for further information.

This symbol, adjacent to a terminal, indicates that, under normal
use, hazardous voltages may be present.

Double insulation

1. Current sense jaw

2. Clamp trigger

3. Safety barrier

4. Voltage output lead

200 A~

CAT III

300 V

Adaptor Description

Specications

• GeneralSpecications

Output impedance <1 kΩ

AC bandwidth 40 to 400 Hz

Jaw opening 16 mm

Operating conditions 32 °F to 86 °F (0 °C to 30 °C) 90% RH;

86 °F to 104 °F (30 °C to 40 °C) 75% RH;
104 °F to 122 °F (40 °C to 50 °C) 45% RH

Storage conditions -22 °F to 140 °F (-30 °C to 60 °C) <90% RH

Altitude Operate at less than 3000 metres

Weight 129 g

Dimensions 111 x 50 x 33 mm (H x W x D)

Standards IEC1010-1 (1995);

EN61010-1 (2001) Category II 600 V, Category III 300 V

• RangeSpecications

Function Range Output Sensitivity Accuracy (of reading)
AC Current (50/60 Hz) 0 to 200 A 1 mV/A 1 A/mV AC ±2.0%±0.5 A

Using the Current Clamp with the PicoLog Software

1. Connect the output lead to the input sockets of the PicoLog CM3 Current
Data Logger.

2. Connect the PicoLog CM3 to your computer using the USB cable supplied.

3. Position the Current Clamp perpendicular to and centered around the
conductor.

4. Run the PicoLog software on the computer.

5. Select File > New Settings and congure PicoLog for a ‘PLCM3’ device.

6. Select File > New Data and click the ‘Start recording’ button when ready.

DO194-1 Copyright © 2011 Pico Technology Ltd.