User manual

2) Press the NULL Hotkey. The Lead Null screen will appear with the Set Lead Null option

highlighted:

(If an extension lead null value is already set the lead null symbol

will be displayed)

3) Connect the extension lead adaptor between the Mains test socket and the IEC socket on the front

panel as below:

4) Scroll down to select “Set Extension Lead Null” on the menu

5) Press the TEST button. The PAT400 will display the value of the test lead as a Null SET value, and

display the

symbol in the top of the screen as below:

To remove the extension lead null select the “Remove Extension Lead Null” and press the TEST or OK

button. The

symbol will disappear.

3.5 Short circuit assets

Some assets may appear to the PAT400 to be short circuit. This can be caused by large inductive loads.

In such cases, the following warning message will be displayed:

Warning: Asset may be short circuit.

Press TEST to continue, ESC to abort