01/10 347 LB 444 K-40
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Rapid switchover:
ON / OFF:
This function (= 1/10 of defined time constant) is needed to adjust the
output signal quickly to the new value if sudden Concentration changes
occur.
This function is not used for potassium content measurements.
Sigma
Sigma defines a range (window) which the display change has to exceed
before the selected time constant automatically switches over to a value that
is smaller by a factor of 10 (max. 0.8 sec).
When using the rapid switchover function, you should at least enter “4” or
better “5” as Sigma value to make sure that a switchover of the time
constant is not triggered too often by statistical variations or minor
Concentration changes. We recommend determining the optimum entry
during routine operation (see also chapter 7.5).
Radiating interference:
This function is needed only when unforeseeable influences due to interfering radiation
are to be expected, e.g. due to weld seam testing. It is enabled and disabled via <ON>
and <OFF>.
Sigma defines a limit value which the display change has to exceed before the
measurement is canceled. The value has to be set such that short-term Concentration
variations occurring during operation do not trigger this function.
Enabling radiating interference detection disables the rapid switchover function.
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
detection 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
measured value in case of malfunctions (e.g. empty measuring path, empty container,
increased 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
regular 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”. For the potassium content measurement you should always enter the value “0”.
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
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