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4.5.4 Trigger/Hold/Laser
The external FTC3 input can be used either as Trigger or Hold or as Laser switch.
Trigger: A logical low signal at the input FTC3 will reset the peak or valley hold function. As long as
the input is kept at logical low level, the software will transfer the actual object temperatures toward
the output. At the next logical high level, the hold function will be restarted.
Hold: This mode acts as an externally generated hold function. A transition at the input FTC3 from
logical high level toward logical low level will transfer the current temperature toward the output. This
temperature will be written to the output until a new transition from high to low occurs at the input
FTC3.
Laser: This mode acts as external triggered laser switch. A logical high signal applied at the input FTC3
will activate the laser.
XR
External switch:
- Relay contacts,
- Transistor,
- TTL output, ...
Figure 24: Wiring the FTC3 Input
Temp.
Figure 25: FTC3 for Resetting the Peak Hold Function
Temp.
Figure 26: FTC3 for Holding the Output Temperature
Rev. B2 Feb 2017
Object temperature
Output temperature
FTC3
Time
Object temperature
Output temperature
Trigger
Time
Operation
31
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