Applications Guide
Modline 5
141
8.5.2
Setting the E-Slope
The E-Slope may be set at the Sensor Rear Panel using the HEAD Menu
E–SL function
or remotely with
the
RS-485 ES Command
. An indirect method of setting the Emissivity is to use the
MATCH function
or RS-485 MT Command.
MATCH allows inputting a temperature value known to be the true target
temperature. The Sensor then automatically adjusts the Emissivity so that the temperature display
indicates the same temperature. Instructions for setup are found in Section 5
manual.
A third way to adjust the Emissivity is to send a
scaled input
of 4 to 20 mAdc via the Orange and
Orange/White twisted wire pair of the Sensor’s interconnecting cable. The Modline 5 senses an input
and overrides any other setting of Emissivity or Match. Wiring and scaling information is in Section 4
8.6
Peak Picker Signal Conditioning
Peak Picker signal conditioning is advisable for certain measurement situations.
If the workpiece you are measuring is moving and is in the field of view for only a brief period
of time.
If a succession of small parts is to be viewed with variable spacing between them.
If the temperature of a moving work-piece varies because of slag, oxides, etc. Using the Peak
Picker allows measuring the highest temperature.
If the line of sight between the instrument and the work piece is momentarily or periodically
interrupted, as by a moving piece of machinery or by bursts of steam or smoke.
illustrates the Peak Picker action. The Peak Picker circuitry responds to the highest
instantaneous value of temperature and holds this value even if the temperature source is interrupted
by one of the conditions listed above.
The indicated temperature (solid line) rises almost instantly, depending on the selected Response Time,
to follow the peaks in actual temperature (dashed line). The indicated temperature decays at a rate
determined by the setting of the Peak Picker Decay Rate.
shows the effect of changing the
decay rate.
The Peak Picker action affects the Temperature Display, Analog Current Output and
RS-485 responses to commands.
8.6.1
Turning Peak Picker On and Off
The Peak Picker can be turned on and off by using the following:
1. The Sensor Rear Panel HEAD menu with the SIGL function. When the Peak Picker is selected,
the PSEL function menu appears for setting of all the Peak Picker operating parameters.
Operation of the SIGL, Peak Picker, PSEL, Decay Rate, Automatic Reset Below, Reset Below and
Delay functions are explained in Section 5
, page 82 of this manual.
2. Remotely using the RS-485 PK and related Commands. See section 6
