FOCUS
1.3
Display information
Page 8
BOGE FOCUS compressor control for piston compressors
A potential leakage is either measured by a
single (LE)
or
continuous (Lc)
value measurement
:
In case of
single leakage measurement
a
single
measurement operation
over six hours serves to determine the hourly operating load times per year
due to leakage.
In order to obtain a precise value it is imperative that no operational com-
pressed air consumption take place during measurement, viz. production is to
be shut off for at least six hours. If measurement is actuated by means of the
control system, measurement will be deferred by six hours. This allows you to
activate the leakage function already in the afternoon causing the measuring
operation to start in the evening (six hours later) to continue over night.
Unlike continuous value measurement, single value measurement is also pos-
sible if several compressors are being operated in the basic load mode at the
same time. Starting separate single value measurement of each compressor
enables you, after a six-hour measurement period, to read and to add up all
of the single values of the compressor control units. Their total value corre-
sponds to the annual number of hours of operating load times as a result of
leakage in your compressed air networks.
Continuous leakage measurement
is designed to
continuously
calculate
operating load values at six-hour intervals.
Unlike single leakage measurement, continuous leakage measurement can
also be started during current daily production with measurement starting at
once. The first value obtained after a six-hour period will probably be distorted
since any operational compressed air production will be added to any potential
leakage related operating load. Most probably, however, no operational pro-
duction will be in effect during any subsequent value measurement. The then
obtained value, which is exclusively due to leakage, will be smaller than the
first obtained value. The control system is designed to always display the
smallest value of all measurements, in this case, however, the last obtained
value. This means that any distorted calculation of production operating loads
will be excluded.
In order to determine exact leakage measurement values make sure that, dur-
ing a time frame of 12 hours, there will in all probability be no operational com-
pressed air production.
Single leakage
measurement
(LE)
The abbreviation
LE
stands for "single leakage measurement".
The displayed value shows the annual operating load times due
to leakage.
Continuous leakage
measurement
(Lc / LC)
The abbreviation
Lc
stands for "continuous leakage measure-
ment“. The displayed value shows the annual operating load
times due to leakage.
When the abbreviation
LC
is displayed, continuous measure-
ment has been carried out for more than a week.
