ircon Modline 5, Operating Instructions Manual

Page: 145 / 156

Applications Guide
Modline 5
Rev. L6 Feb 2017
143
8.6.3 Peak Picker Signal Conditioning
Peak Picker signal conditioning takes place with the Peak Picker on. Temperature readings may be
returned to instantaneous values at any time by setting the SIGL function to OFF. The system then
follows actual temperature variations as they occur.
Both Peak Picking signal conditioning and direct instantaneous temperature indication are affected by
the selected Response Time.
8.6.4 Peak Picker Reset
The Peak Picker signal conditioning can be reset by any of the following actions:
• Manual reset using the Sensor rear panel PSEL menu RSET function.
• Remote reset with a momentary switch closure across the Sensor’s interconnecting cable Violet
and Violet/White twisted wire pair.
• Automatic reset using the Auto Peak Picker Reset function with Reset Below Temperature
selection.
• Remote reset with the RS 485 PS Command
8.6.5 Peak Picker Decay Rate
The Decay Rate is set to retain peak measured temperature value and ignore momentary decreases in
measured temperature caused by process conditions. The goal is to eliminate erratic measurements due
to gaps in work pieces, bursts of smoke, or steam, etc. in the sight path of the Sensor.
The Decay Rate range is 0.00 to 300 degrees. The Decay Rate setting is unit-less. The units are defined
by the selected Sensor measurement units, Fahrenheit or Celsius.
The fastest decay rate is 300 degrees per second. The slowest decay rate is 0 degrees per second. This
slowest decay, for practical purposes, can be considered as a Peak Hold with the highest peak measured
temperature held until a Reset occurs.
Select a Decay Rate that will yield the decay needed for meaningful process measurement. Refer to
Figure 82 .
8.6.6 Auto Peak Picker Reset with Reset Below
An automatic reset is accomplished with the Auto Peak Reset and Reset Below functions. These
functions are turned on with the Sensor rear panel PSEL menu AUTO and RBEL functions or the RS-
485
PS and PK Commands . Figure 83 illustrates Auto Peak Picker Reset.
This reset action is triggered when the measured temperature goes below the selected Reset Below
Temperature.
When the measured temperature is below this temperature, the displayed temperature indication will
be the measured temperature unaffected by the Peak Picker signal conditioning, subject to any Response
Time selection.