LumaSense Technologies IS 12-Al/S - Manual (Page 24)

IS 12 AI & IS 12-AI/S Parameters 24
The disadvantages of fluctuations in the display with the clock frequency are thereby
eliminated.
The following settings are possible:
Off: Clear time “0.00“: the storage is switched off and only momentary values are measured.
0.01…25 s: If any clear time is set, the maximum value is estimated and held in double storage
mode. After the entered time the storage will be deleted.
extern: The external clearing of the storage can be activated and used within an own software
(see Chapter 9 Data format UPP (Universal Pyrometer Protocol)) or via an external contact (for
connection see 3.1.1 Pin assignment for the connector on the back of the pyrometer). 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 the measuring beam of the pyrometer only for 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 (or cold) 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.
Note: In the command structure, the maximum storage comes after the exposure
time. This results in:
clear time the adjusted response time is useless
clear times must be at least 3 times longer than the response time
only maxima with full maximum value can be recorded, which appear at
least 3 times longer than the response time.
5.4 FROM / TO (beginning and end of sub range)
You have the opportunity to choose a sub range (minimum 51 °C) within the basic measuring
range of the pyrometer. This sub range corresponds to the analog output. “FROM“ describes
the beginning of this measuring range, “TO“ the end of the range.
Additionally, with the setting of a sub range it is possible to fulfill the requirements of the
“auto” clear mode of the maximum value storage (see above).
5.5 Analog Output (0 / 4 mA)
The analog output has to be selected according to the signal input of the
connected instrument (controller, PLC, etc.).
5.6 SETP (limit contacts)
The instrument is equipped with two independent relay limit switches. These are two separate
switch-over relay contacts, adjustable to any temperature of the pyrometer’s temperature
range. The switch-status is indicated in the display with the LED’s S1 and S2. When the
measuring temperature exceeds the adjusted limit contact temperature the relay switches and
the LED indication is on.
Settings:
0 ... 20 mA
4 ... 20 mA