Advanced Valley Hold; Setpoint; Deadband; Figure 33: Valley Hold - Fluke Endurance Series User Manual

Once Valley Hold is set above 0, it automatically activates. The output signal remains the same
until one of two things happens:
•
•
Note that other signal processing functions (like Averaging or Peak Hold) do not work
concurrently with Valley Hold.

7.5. Advanced Valley Hold

This function works similar to the advanced peak hold function, except it will search the signal
for a local minimum.

7.6. Setpoint

The Setpoint function is a temperature supervising alarm mechanism, which can be activated.
A Setpoint entry defines a maximum supervising value for the target temperature. If the Setpoint
value is exceeded, an alarm state will be signaled by a relays contact. A zero (0.0) entry as a
Setpoint value deactivates the alarm functionality (Alarm mode off). To activate the alarm
functionality, set the Setpoint entry to a value between the lowest and the highest measurable
target temperature. Once the Setpoint is activated the relay changes state as the current
temperature passes the setpoint temperature.

7.7. Deadband

Deadband is a zone of flexibility around the Setpoint. The alarm does not go abnormal until the
temperature exceeds the Setpoint value by the number of set deadband degrees. Thereafter,
it does not go normal until the temperature is below the Setpoint by the number of set deadband
degrees. The Deadband is factory preset to ± 2° (C or F). Adjusting the Deadband entry is
accomplished through software or manual input via the control panel. For information regarding
the Endurance sensor communication protocols, see section 10, Programming Guide, page 83.
The following figure is an example of the Deadband around a Setpoint temperature of 960°C
(1760°F).
1.800.561.8187
Temp
The valley hold time runs out. In this case, the signal reverts to actual temperature.
The actual temperature goes below the hold temperature. In this case, starts holding
new valley.
www.
hold time

Figure 33: Valley Hold

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Signal Processing
Advanced Valley Hold
output temperature
object temperature
hold time
Time
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