Instructions

3. Insert the ‘free end’ of the coil fully inside the ferrule.

4. Re-energise the conductor.

5. Use the push button to switch ON by pressing and releasing the button, and to turn OFF

by depressing the button fully; the LED indicates that the transducer is ON when the LED

is GREEN.

6. After switch-on the Teledyne Test Tools Rogowski probes, they may require a settling period

of up to 2 minutes before providing a correct current measurement. The settling period is

dependent on warm-up time and the low frequency bandwidth.

OBTAINING THE BEST MEASUREMENT

The Rogowski coil should be positioned so that the conductor under test is encircled by the coil

but is not adjacent to the cable attachment (see picture below). The diagram shows the direction

a positive current should pass through the coil loop in order to obtain a positive output voltage.

The Teledyne Test Tools Rogowski probe has been calibrated with the conductor near the

centre (position A), and this is the ideal position for accuracy.

For the best high frequency performance, the centre of the current should lie on the line shown

A to B, where B is half way around the circumference of the coil.

SENSITIVITY TO EXTERNAL CURRENTS AND VOLTAGES

The sensitivity of the Teledyne Test Tools Rogowski probes to currents that are outside the closed

loop of the Rogowski coil is very small, provided that the external currents are less than the

current rating of the Teledyne Test Tools Rogowski probes or that such currents are relatively

distant from the coil. In the vicinity of a multi-turn conductor the eects are far stronger than from

a single conductor carrying the same current, and such positions should be avoided.

I current

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KEEP CONDUCTORS

AWAY FROM

SHADED AREA