Siemens 7MC3040-..., Руководство по эксплуатации, Страница: 30 / 116

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Operating manual PA
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not drop between targeted objects. The peak temperature reading will be
held for a preset time period.
Configure a hold time between 0.01 to 999 sec. either from your PC ter-
minal or using the pyrometer’s rear panel buttons. The maximum tem-
perature sampled during the defined hold time will be saved. This value
is transmitted to the signal output. In mid-sequence-- after 50% lapse of
the hold time
—a second internal peak picker starts. When the hold time
has expired, the output signal decreases to the value of the second peak
temperature (if it turned out being lower than the first peak). It makes
sense to choose a hold time which is approximately 1 ½ times as long as
the cycle of the moving targets. This ensures that a temperature meas-
urement gap is avoided and temperature changes are detected quickly.
As an option, one of the switching inputs can be configured to reset the
min/max memory and to define the smoothing filter setting.
target object in the pyrometer
’s field of view
holdtime
time
temp. reading with double max. buffer
temp. measurement without double max. buffer
Automatic temperature detection (ATD) function **
This function serves to automatically detect the temperature during man-
ufacturing processes with discontinuous or intermittent material flow.
First, define the sampling time and the upper and lower temperature lim-
its. These limits or thresholds define the temperature range within which
you wish to detect the temperature. It is also possible to determine the
average temperature value over the course of multiple measuring cycles.
The start of a measuring cycle is determined automatically and is de-
pendent on the following variables.