Signal Processing; Averaging; Peak Hold; Reset Peak Hold By Peak Hold Time Expiration - Fluke Endurance Series User Manual

Endurance® Series
Users Manual

7. Signal Processing

The activation and modification of signal processing functions and their associated
parameters is possible via the PC based Endurance
programming commands, or over the rear control panel (Endurance

7.1. Averaging

Averaging is to smooth the output signal. The output signal smooth algorithm depends on the
defined time basis. The output signal tracks the detector signal with significant time delay in
which noise and short peaks will be smoothend. A longer average time smoothens the damping
behavior. The average time is the amount of time the output signal needs to reach 90%
magnitude of an object temperature jump. The range for the average time can be set from 0.1
to 300.0 seconds, whereas just 0.1 - 299.9 seconds will be interpreted as averaging duration.
A value of 300.0 seconds indicates that averaging post processing depends on an external
trigger signal. A low-level input signal (pull to GND) at the external input (Trigger) will promptly
interrupt the averaging and will restart the average calculation with the current temperature
reading.
Temp
Attention: The disadvantage of averaging is the time delay of the output signal. If the
temperature jumps at the input (hot object), the output signal reaches only 90% magnitude of
the actual object temperature after the defined average time.
Once Averaging is set above 0, it automatically activates. Note that other hold functions (like
Peak Hold or Valley Hold) do not work concurrently.

7.2. Peak Hold

The output signal follows the object temperature up to the point, where a new maximum is
detected. The output will hold the maximum temperature value for the preset duration of the
peak hold time. Once the peak hold time expires, the peak hold function will reset and the output
will resume tracking the object temperature until a new peak is reached. The range for the peak
hold time can be set from 0.1 to 300.0 seconds, whereas just 0.1 - 299.9 seconds will be
interpreted as peak hold duration. A value of 300.0 seconds indicates that peak hold post
processing depends on an external trigger signal. A low-level input signal (pull to GND) at the
external input (Trigger) will promptly interrupt the peak hold function and restarts the peak
holding with the current temperature reading.

7.2.1. Reset Peak Hold by Peak Hold Time expiration

Once the Peak Hold Time is set between 0.1 until 299.9 seconds, it automatically activates.
The post-processed peak hold value stays the same up to the following happens:
48
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software, serial LAN or RS485
temperature jump

Figure 33: Averaging

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user interface).
output temperature
object temperature
90% of
temperature jump
average time
Time