Endress Hauser level transmitter locked?

A

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Anonymous

We are facing some problem in the level transmitter -Type: FMR 240. We want to change some parameters of transmitter but it is locked. The display in this condition is showing the following:

Unlock parameter 0A4
WHG locked

There is no procedure given in the manual regarding unlocking of WHG. We have also tried hard to reset it to factory settings by entering 333(reset customer parameters) in 0A3 but we are not able to change its value from 0 to 333. Kindly advise in this issue.
 
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