The meter’s CheckActive™ mode lets you quickly determine if a fiber is connected to active equipment. This mode helps you locate active links and avoid exposure to hazardous radiation.

To use CheckActive mode:
  1. Press the MODE key until CheckActive™ appears.
  2. Connect the meter to a fiber. (Using a fiber cord ensures the Input Port of the SimpliFiber Pro remains clean and does not pick up dust in the room).

  3. The meter indicates fiber activity as shown below:
Ceiling lights can activate the CheckActive™ tone. To avoid this, keep a patch cord connected to the meter if the meter is in CheckActive™ mode. Rotating the SimpliFiber pro 90º will also prevent the overhead lights from activating it.