LumaSense Technologies IGA 320/23 - Handbuch (Seite 13)

IMPAC pyrometer IGA 320/23
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inside a furnace), the measurement might be falsified (probably too high temperature indication). This influ-
ence can be compensated by presetting of the ambient temperature of the object (presetting within the
measuring range of the instrument).
After switching over to “man” the corresponding data field T(amb) is activated so that the ambient tempera-
ture value can be entered.
It has to be considered, that this method only improves the results if the ambient temperature
at the place of the measured object is always constant and the emissivity is well known.
6.14
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.
Only via own communication program with interface command (not possible with InfraWin, because
InfraWin automatically detects a connected pyrometer): If parameters may be changed simultaneously 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 un-
known, it is possible to communicate with it using the global Address 99 (connect only one pyrometer).
6.15
Limit switch (SP1)
The pyrometer is equipped with a switch contact (opto relais; max. 50 V DC, 0.2 A; max. power 800 mW),
controlled from the measuring signal. The contact is activated with:
 Close above: The contact closes (switches to ground), if the temperature entered in the “SP1“ box is
exceeded. If the temperature falls below that value minus the hysteresis the contact opens (a hysteresis
between 2 and 20°C can be set to avoid oscillating of the switch in the switch point).
 Close below: The contact closes (switches to ground), if the temperature falls below the entered value
in the “SP1“ box. If the temperature exceeds that value plus the hysteresis the contact opens (a hystere-
sis between 2 and 20°C can be set to avoid oscillating of the switch in the switch point).
6.16
Operating hours
Shows the operation time since the pyrometer is in use.
Settings:
00
. . .
97