BERTHOLD TECHNOLOGIES LB4710-050, User Manual, Page: 28 / 227

Chapter 3 Functional Safety
Mini-Switch LB 471
28
Function check

Level is at least 50mm below the limit level when the radia-
tion channel of the shielding is open.
 The measured value in code 10 has to fluctuate around 0%.
The alarm output must not trigger an alarm.

Increase the level above the limit level or close the shield-
ing.
 The measured value in code 10 has to fluctuate around
100%. The alarm output must indicate an alarm and must
not switch back anymore.
Password

Enter a password in code 00.
 This rules out data manipulation by unauthorized persons.
The error relay switches to normal only when the password
has been entered and no error message is output.
The calibration is now finished and the measurement has been
taken into operation.
3.6
Behavior during Operation and
Malfunctions

The following parameter are automatically adjusted in the
course of operation relative to the decay compensation; there-
fore, their values may change: code 12 and code 18 – 31

If the operation is changed, please observe the safety func-
tions.

Malfunctions that may occur are described in the User’s Manu-
al.

If failures have been detected or malfunctions are reported,
you have to take the entire measuring system out of service
and keep the process in a safe state through other measures.

Replacement of the measuring system is rather simple; it is
described in the User’s Manual.

If parts are replaced as a result of a detected failure, please
inform B
ERTHOLD
T
ECHNOLOGIES
(including failure description).

If modifications in the product, the gas pressure, or the con-
struction of the tank in the area of the radiation path are car-
ried out, the measurement has to be calibrated again.