Detection Of The Peak Values; Control Of The Relay Output - Level Pro ITC 250 SERIES User Manual

250 SERIES
Loop Powered Display
Configuration of the device via menu does not interrupt the level measurement.

6.2. DETECTION OF THE PEAK VALUES

The ITC 250 controller is equipped with a peak detection function. It can detect the input signal peaks
and display their values. Presets connected with this function are placed in "HOLd" menu (see
description of "HOLd" menu).

6.3. CONTROL OF THE RELAY OUTPUT

The 250 Series display is equipped with one bistable SPDT relay output. When energized it will LED
'R' will light up. It is not possible to change relay state until after 10 seconds has elapsed since the
device has been powered on. The display must be powered by at least 3.5 mA current. After the
display is properly powered the change of relay state is four (4) seconds. During device power off the
relay is set according to the value of "AL" parameter.
The different modes of the control can be changed and are dependent on the parameter values for
"SEtP", "SEt2", "HYSt", "modE" and "AL". The "modE" parameter will also the relay to be used or
controlled over one or two thresholds values. If one threshold is used (figure 6.4) the relay can be
turned on ("modE" = "on") or off ("modE" = "oFF") when the input signal value enters the zone A. If
two thresholds are used (figure 6.5) the relay will be turned on when value of input signal enters the
zone A ("modE" = "in") or zone B ("modE" = "out") and turned off if the signal enters the second
one.
"timE"
"PEA"
"PEA"
Figure 6.4. Process of peaks detection
"timE"
09