LumaSense Technologies IS 320 - Manual (Page 17)

IS 320 • IGA 320 Manual General 17
4.9 Clear Time of the Maximum/Minimum Value Storage (t
CL
)
If maximum value storage is on, the highest last temperature value will
always be displayed and stored. Minimum value storage saves the lowest
measurement taken during a reading. The storage has to be cleared at
regular intervals for exchanging by a new and actual value.
This feature is particularly useful when fluctuating object temperatures cause
the display or the analog outputs to change too rapidly or the pyrometer is
not constantly viewing an object to be measured. In addition, it may also be
beneficial to periodically delete and reset the stored maximum values.
The following settings are possible:
Off:
Maximum value storage is deactivated and only immediate values are
measured.
0.01...25 s: If any clear time between 0.01 s and 25 s is set, the maximum value is
estimated and held in double storage mode. After the entered time, the
storage will be deleted.
extern: External clearing can be activated and used with other software and the
clear command “lx” (see Section 8, Data format UPP). In this case, the
storage operates only in single storage, because only a single deletion
mechanism is used.
auto: The “auto” mode is used for discontinuous measuring tasks. For example,
objects are transported on a conveyer belt and pass under the measuring
beam of the pyrometer for only a few seconds. Here the maximum value
for each object has to be indicated. In this mode, the maximum value is
stored until a new hot object appears in the measuring beam. The
temperature which has to be recognized as “hot“ is defined by the low
limit of the adjusted sub range. The stored maximum value will be deleted
when the temperature of the new hot object exceeds the low limit “from”
of the sub range by 1% or at least 2 °C. If a lower limit is not entered, the
maximum value storage will be deleted whenever the lower level of the full
measuring range has been exceeded.
Operation note: Depending on the settings, the maximum value storage either works in
single storage mode or in double storage mode:
Single storage: Single storage is used when you want to reset the stored value using other
software and the clear (“lx”) command. This mode allows a new value to
be established after each impulse from the reset signal.
Double storage: When entering the reset intervals via PC interface, double storage is
automatically selected. This mode utilizes two memories, in which the
highest measured value is held and is deleted alternately in the time
interval set (clear time). The other memory retains the maximum value
throughout the next time interval. The disadvantages of fluctuations in the
display with the clock frequency are thereby eliminated.
Note: Maximum value storage follows the function of adjustment of ex-posure time.
This results in:
clear time the adjusted response time is useless
clear times must be at least three times longer than the response time
only maxima with full maximum value can be recorded, which appear at least three
times longer than the response time.
Settings:
off
0.01 s
...
25 s
extern
auto