Chapter 4 Getting Started
Mini-Switch LB 471
4.4 Calibration in Standard Mode
Empty calibration has to be performed in order to calibrate the
measurement.
Prerequisites (see also page 60):
Container must be empty or at least below the monitoring
level.
The gas density existing under actual operating conditions is
available in the container. If this is not possible, select the pro-
fessional mode and compensate the gas density value with
code 35. The special features of the professional mode have to
be taken into account.
A possible existing heating or cooling jacket is filled with the
medium to be used later.
In agitator containers, the agitator must in operation, if it may
have any influence on the limit value.
The shielding with the source has been installed. The radiation
exit channel is open.
The EVU is not in the edit mode.
Calibration:
Push Cal button for 3 seconds.
The seconds are counted down in the top row.
The bottom row shows the count rate.
In code 20 you can read off the measured zero count rate.
The measurement is now calibrated and already sup-
plies live measured values.
A system check has to be carried out to ensure that the measure-
ment operates correctly.
To do this, fill the container above fill level limit, or alternatively,
close the shielding when the container is empty.
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