BERTHOLD TECHNOLOGIES LB 444, Operating Manual

Page: 31 / 127

04/03
347
LB 444
21
Radiating interference delay time: (only with Radiating interference “ON”)
Interference due to radiation is normally only of short duration. After the delay time you
have entered here is over, the measurement starts again automatically following detec-
tion of Radiating interference.
Maximum rate:
The measurement stops automatically as soon as the count rate supplied by the detector
exceeds the entered value. The output current signal is held at the last value. The error
message “Measurement halted” is displayed. The measurement continues automatically
as soon as the count rate has dropped below the entered value.
The entered values are permanently corrected during decay compensation.
The functions “Maximum Rate” and “Minimum Rate” can be used to “freeze” the meas-
ured value in case of malfunctions (e.g. empty measuring path, empty container, in-
creased radiation due to weld seam testing, etc.) and to avoid long response times of the
control devices. Select the input values such that that they will not be reached during re-
gular operation.
If this function is not important for your operation, disable it by entering a pulse rate of
“0”.
Minimum rate:
The measurement stops automatically as soon as the count rate supplied by the detector
falls below the entered value.
If this function is not important for your operation, disable it by entering a pulse rate of
“0”.
Current input:
For temperature compensation via current input:
Select current input range 0-20 mA or 4-20 mA.
For mass flow measurements:
The signal defined here is used for the volume flow.
Temp. Input 0/4mA: 20mA:
These entries are required only for temperature compensation via current input. Enter
the upper and lower temperature values for 0/4mA or 20mA.
Product selection [extern/intern]
Define if the product is to be selected
via the keyboard of the evaluation unit
(internal) or via digital inputs (external,
18a/c, 20a/c).
Product DI1 18 a/c DI2 20 a/c
1 0 0
2 0 1
3 1 0
4 1 1
1= terminal a/c connected