Metek LAND LWIR, Руководство по установке

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LWIR Thermal Imaging Camera
Installation Guide
5.11.4 Sample and Hold
Time
Te
m
p
0V
+V
Command
Command signal = Closure of potential-free contacts,
TTL level (0 to 5V)
or 0 to 24V
Sample Sample Hold Hold
s/c = Hold
+5V = Track
+24V = Track
0V = Hold
Fig. 5-6 Graphical representation of Sample and Hold time function
Refer to Fig. 5-6. The Sample and Hold time function is useful especially for
measuring intermittent processes e.g. items on a conveyor belt. The presence
of a hot object can be used to activate the Sample function, which displays
a live thermal temperature of the object. When the object moves from the
measurement area, the Sample function can be switched off and the thermal
image not updated until the next hot object appears.
The Sample and Hold function is controlled via the CMD (Command) input.