LumaSense Technologies ISQ 5-LO - Handbuch (Seite 17)

IMPAC pyrometers ISQ 5 · ISQ 5-LO
17
extern: The external clearing can be activated and used within an own software (see section 13, Data
format UPP
® ) or via an external contact (for connection see 3.1 Connector pin assignment
on the back side 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 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 ex-
ceeded.
Hold: The function “hold” enables to freeze the current temperature reading at any moment. For this
an external push button or switch has to be connected (see connector pin J in 3.1) which holds
the temperature reading as long as the contacts are closed.
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 external im-
pulse via one contact closure from an external relay (i.e. between two measured objects). The relay contact
is connected directly to the pyrometer between pins J and K. This mode allows a new value to be estab-
lished, 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: It doesn’t make sense to use the maximum value storage if an integrated PID control-
ler is used. Therefore the clear time should be set to OFF position.
The external delete function cannot be used when the PID controller is active, as the
switch contact (connector pin J) is used for emergency switch-off. If the maximum
value storage is set to external delete when the PID controller is activated, the clear
time automatically will be set to OFF.
Note: The maximum value storage follows the function of adjustment of response 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.
8.2
Internal temperature of the pyrometer
The internal temperature of the pyrometer can be read on the interface. It is a few degrees higher than the
ambient temperature due to the heat generated by the electronics.
8.3
Address
For the connecting of several pyrometers with RS485 with one serial interface it is nec-
essary to give each instrument an individual address for communication. First it is nec-
essary to connect each single instrument to give it an address. After that all instruments
can be connected and addressed individually. If parameters may be changed simulta-
neously on all pyrometers, the global Address 98 can be used. This allows you to program all pyrometers at
the same time, regardless of the addresses that have already been assigned. If the address of a pyrometer
is unknown, it is possible to communicate with it using the global Address 99 (connect only one pyrometer).
Settings:
00
. . .
97