Siemens Ardoptix PT 140 AF1, Operating Manual, Page: 25 / 68

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Operating manual
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15.2 Min/Max memory
The pyrometer features a data memory to store minimum and maximum
(peak) temperature readings. This feature can be configured in one of
the following modes:

Memory off

Store minimum value (single)

Store maximum value (single)

Store double max. value for cyclical processes

ATD function (Only available in pyrometer with ATD function)
15.2.1 Min/Max Memory
In this mode
—also called peak picker—the pyrometer determines the
highest or lowest temperature reading and keeps the temperature read-
ing. The value is stored until you press the ON button again. Additionally,
you can define the smoothing filter setting.
15.2.2 Double Maximum Memory with hold time
In this operating mode the pyrometer continuously detects the maximum
temperature reading. This value is stored for the duration of the config-
ured hold time and is displayed on the rear panel. In mid-sequence
– af-
ter 50% lapse of the hold time
– a second internal peak picker starts.
When the hold time has expired without finding a new max value, the
output signal decreases to the value of the second peak temperature (if it
turned out being lower than the first peak).
This memory mode serves to detect the maximum temperature of ob-
jects moving periodically past the pyrometer lens. The temperature read-
ing is kept for the duration of the configured holding time when the py-
rometer does not detect any hot object. The holding time should be con-
figured to approximately 1.5 times as long as the cycle of the moving tar-
gets. This ensures that a temperature measurement gap is avoided and
temperature changes are detected quickly.