Dr. Livingstone, I Presume WELDWISE 2400 - Manual (Page 108)

0435-INS-400 Rev. D
8-4
Figure 8-4 Percent change After Entering
Percentage Adjustment
The current reading from a Livingston toroid may not match the local factory weld current standard.
There are three reasons for this:
1. The way a toroid is mounted on the welding bus can affect the accuracy of the reading;
2. There is no recognized 'standard' for high current calibration, so calibrations tend to vary
among manufacturers.
3. Not all manufacturers use the same math to calculate the current measurement.
To compensate for these differences, Livingston offers a feature called Percentage Adjustment. The
percent adjustment option takes whatever value was received from the channel and adjusts it by
whatever percentage you specify. The adjustment applies both to Current Peak and to Current Rms.
This means that if the current reading from a Livingston monitor absolutely needs to match the current
reading from another current measuring device, the Livingston monitor can be easily adjusted so that
the readings are the same.
To obtain the correct Percentage Adjustment:
1. Make a weld then return to the toroid settings
screen. The last weld’s Current RMS value is
displayed.
2. Take the reading from your weld control or
Plant standard current meter and enter the
value into the Desired Current RMS field.
Press Enter on your keyboard or click the
Enter button on the virtual Keypad. You will
see the Percent adjusted display, see Figure 8-
4.
3. Click the Update Configuration Button. This
will save the percentage change. Now escape
out to the main screen, make another weld and
return to the Toroid Settings screen. The two
current RMS fields will now match, as shown
in figure 8-5.
4. If you would like to return to 100% simply edit
the Percent field back to 100 and press enter
and then click the Update Configuration
button.
Figure 8-5