Track And Hold - Ametek Land LMG GS User Manual

User Guide

4.2 Track and Hold

Refer to Fig. 31. The Track 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 'Track' function, which causes
the output to display the temperature of the object. When the object moves
from the measurement area, the 'Track' function can be switched off and the
temperature value held until the next 'hot' object appears.
The Track and Hold function function is controlled via the CMD (Command)
input. The CMD input connections and operation is shown in Fig. 7 and Fig. 8.
Time
+V
Command
Command signal =
Fig. 31 - Graphical representation of Track and Hold time function
LMG GS
Track Hold
Closure of potential-free contacts,
TTL level (0 to 5V )
or 0 to 24V
Signal Processor
0V
Track Hold
s/c = Hold
+5V = Track
+24V = Track
0V = Hold
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