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Application /Product Knowledge

Reasons and how to prevent drifting of received light value when using fibers

Article No: KA-09208
Version: 1.0
Subject to change without notice
Reasons and how to prevent drifting of received light value when using fibers
Related Products
WLL80
WLL180

Table of Contents

The reasons for a drifting  of the receiving light value can vary: 

- slowly ageing LED (drift should occur over a very long time (~100.000h). 
- dirt on the lenses (when cleaning, small scratches from the towel can lead to this behaviour)
- misalignment due to vibrations or force of the cleaning process
- UV light that leads to ageing of the fiber (especially for fibers with plastic core)
- Temperature changes 
 
The WLL180T does have a mode that helps to prevent such drifts. You will find it in the menu of the device. 

Also the new WLL80 comes with a feature to help here:
SPC (Sender Power control) and Switching point adjustment (AutoAdapt):
Keywords:
drift, fibers, SPC, AutoAdapt, ASC, cleaning, UV, vibrations, ageing
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