LumaSense Technologies IS 12-Al/S - Manual (Page 20)

IS 12 AI & IS 12-AI/S Instrument settings 20
3) ENT
If a parameter is changed with the arrow keys, the new value must be
confirmed by pushing the ENT key. If it is not confirmed with ENT, the
instrument is still operating with the previous parameter value. If no key
is pressed for approx. 30 s, the display changes to the temperature
indication.
Limit contacts Two limit switches can be set. If the measuring temperature exceeds the
adjusted limit contact temperature, the LED S1 or S2 displays the switch
status.
Scale °C or °F The LED indicates the temperature scale in °C or °F.
Parameter
indicator
LEDs indicate which pyrometer parameter is selected for reading or
changing.
4.3 Factory Settings
Emissivity ( ) = 1.000
Exposure time (t
90
/ s) = off
Clear time (t
CL
) = off
Sub range (from / to) same as temperature range
Analog output (0 / 4 mA) = 0 ... 20 mA
Limit contacts = end of temperature range
Hysteresis = ±2°C
scanning angle (only IS 12-Al/S): 4°
scanning frequency (only IS 12-Al/S): 5 Hz
Temperature display (°C / °F) = °C
Interface (RS) = RS232
Address (ADR) = 00
Baud rate (kBaud) = 19.2 kBd
Test current output (10 mA) = off
4.4 Types IS 12-Al/S with built-in scanner
4.4.1 Function
The pyrometer IS 12-Al/S is equipped with a built-in
scanning mechanism which moves the measuring beam up
and down. In combination with the pyrometer's maximum
value storage (peak picker) the scanner is used for finding
the highest temperature. This function is very useful for
extrusion applications with frequent changes of dies to
produce different aluminum profiles. In that case, the
pyrometer does not need new alignment after changing
of die.
The instrument is equipped with a thru-lens view finder
and an additional laser targeting light for exact alignment to the position of the measuring
object. The thru-lens view finder doesn’t follow the scanning mirror movement, it always shows
the center of the scanning amplitude. The laser targeting light follows the scanning mirror
movement and shows always the position of the measuring spot.
The moving measuring beam does not increase the spot sizes due to the fast exposure time of
the pyrometers.
The scanning length increases with increasing
measuring distance. An overview of the
scanning length at the different distances of the
optics is shown in the table.
distance a scanning distance at
4° scanning angle
a = 80 mm 5.6 mm
a = 160 mm 11.2 mm
a = 250 mm 17.5 mm
a = 660 mm 46 mm
a = 1300 mm 91 mm
a = 5600 mm 391 mm
scanning
amplitude