Land Solonet - Track and Hold

To Next Page

To Previous Page

User Guide User Guide

Page 28 PP307 Page 28 PP307

6.3 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 function is controlled via

the CMD (Command) input. The CMD input connections and operation are shown

in Fig. 22 and Fig. 23.

Fig. 21 - Graphical Representation of the Track and Hold Time Function

Time

Temp

Command

Command signal =

Closure of potential-free contacts,

TTL level (0 to 5V)

or 0 to 24V

Track TrackHold Hold

s/c = Hold

+5V = Track

+24V = Track

0V = Hold

307021

Command signal = Closure of potential-free contacts, s/c = Hold / o/c = Track

TTL level (0 to 5V), +5V = Track

0 to 24V, +24V = Track / 0V = Hold