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© Retrotec 2017
When the gauge is controlling to a speed or pressure so that fan speed is not at 0%, the gauge can
extrapolate the Result and show a value for the Result that would have been achieved if the pressure on
Channel A had reached a different value.
The “different value” mentioned is called the extrapolation
pressure or “@ Pressure”.
If setting speed, the extrapolation
pressure will be the “Default @ Pressure” the
user can enter in the second “Settings” screen. If setting pressure, the
extrapolation pressure will be
exactly the target pressure.
If setting target pressure to zero, then the gauge does not allow @ pressure extrapolation to be used.
For mathematical details on @Pressure extrapolation, see
. For practical information on
extrapolation, see 2.6.4.
Figure 26: Turn [@ Pressure] on
Figure 27: [@ Pressure] is not available when Pressure is the Result on Channel B
Figure 28: [@ Pressure] is not available when the gauge is not actively controlling a fan
If
[Set Pressure]
function is used:
•
Tapping
[@ Pressure]
so that it “is On”
extrapolates the
[Channel B]
Result to the
[Set Pressure]
target
entered, using the “n” value specified in the
second
“Settings” screen.
