LumaSense Technologies IGA 320/23 - Handbuch (Seite 12)

IMPAC pyrometer IGA 320/23
12
auto: The “auto” mode is used for discontinuous measuring tasks. For example objects are trans-
ported on a conveyer belt and pass the measuring beam of the pyrometer only for a few sec-
onds. 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: dependent on the settings the maximum value storage either works in single storage mode
or in double storage mode:
Single storage: the single storage is used when you want to reset the stored value using an own software
and the clear command “lx”. This mode allows a new value to be established, after each impulse from the
reset signal.
Double storage: when entering the reset intervals via push buttons or PC interface the 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: The maximum value storage follows the function of adjustment of 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.
6.9.1 max / min
When entering a reset time interval other than 0, it must also be determined with “max” or “min” if the maxi-
mum or minimum value storage will be activated.
6.10
Analog output
The analog output has to be selected according to the signal input of the connected
instrument (controller, PLC, etc.).
6.11
LED targeting light
If the pyrometer is supplied with power the LED targeting light is automatically active. It can be adjusted if the
targeting light is off whether the pyrometer is connected to the power supply. Independent of this setting the
targeting light can be switched on or off at this point (targeting icon ).
6.12
Subrange
You have the opportunity to choose a subrange (minimum 51°C) within the basic measuring range of the
pyrometer. This subrange corresponds to the analog output. Reduction of the temperature range increases
the accuracy of the analog output.
Additionally with the setting of a subrange it is possible to fulfill the requirements of the “auto” clear mode of
the maximum value storage (see 6.9).
6.13
Ambient temperature compensation
The compensation of the ambient temperature can be used at low measuring tempera-
tures (below 100°C). This compensation is used for a very few special applications only.
The standard setting of this parameter is “auto”, because the temperature of the air
around the pyrometer is normally the ambient temperature of the measured object.
Should the measured object be placed in an area with a higher wall temperature (e.g.
Settings:
0 ... 20 mA
4 ... 20 mA
Settings:
auto
00°C (32°F)
. . .
70°C (158°F)