Track And Hold - Ametek LAND IQ Series User Manual

Fixed Spot Thermometer

7.3 Track and Hold

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 is controlled via the
CMD (Command) input. The CMD input connections and operation are shown in
Fig. 7-4 and Fig. 7-5.
Time
0V
Command
Command signal = Closure of potential-free contacts,
Fig. 7-3 Graphical representation of the Track and Hold time function
User Guide
Track Hold
TTL level (0 to 5V)
or 0 to 24V
+V
Track Hold
s/c = Hold
+5V = Track
+24V = Track
0V = Hold
series
7 - 3