Crystal FastCalXP Calibration Software Manual do Utilizador descarregar pdf (Página 24)

Calibrating Gauges  22

FastCalXP Operation Manual

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PEAK MODE CALIBRATION

Peak Mode calibration uses FastCalXP’s peak detection capability to take advantage of adiabatic pressure changes. In Peak Mode, the Reference reading is the

largest (or smallest when descending) value recorded by the reference since the peaks were last cleared. FastCalXP will determine automatically whether you

are ascending or descending in order to correctly pick a maximum or minimum for the “Peak.”

Peak Mode will typically be used to calibrate analog gauges since it is possible to visually align the needle at the next point. Peak Mode is not recommended

for digital devices.

Peak Mode with Auto Peak Detection

Auto Peak Detection mode provides the fastest way of performing a calibration for the experienced operator. With Auto Peak turned on, FastCalXP will auto-

matically detect a peak in the ascending portion, or valley in the descending portion of the pro le, record the value reached at the peak or valley and advance

to the next pro le point.

Auto Peak mode is set up speci cally for calibrations where the gauge is being matched to the Target Pressure value.



To change the default to Peak Mode with auto detection

1 Choose Options from the Tools menu and click on the Calibration Settings tab.

2 Select the Peak calibration method.

You will also have the option of specifying the number of readings to look at in determining if a peak has been reached. The default is  ve but the optimal

number will depend on the individual operator’s speed and will likely be determined experimentally. A number that is too high will cause a delay in the

detection of the peak and a number that is too low will cause FastCalXP to detect undesired peaks.



To Make a Measurement in Peak Mode with Auto Detection

1 Turn the handle of the comparator smoothly and steadily until the gauge reads the Target Pressure value.

2 Stop, wait for the program to beep and record the data point.

3 Turn the handle again for the next pro le st

ep.



To Clear the Last Pro le Step in Peak Mode with Auto Detection

1 Turn the handle of the comparator to back o from the last pressure step.

2 Click the Previous Point button and approach the target again.

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