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3. Adjust to suit the measurement application.
4. Press OK to set the alarm value and return to the menu screen, or ESC to cancel.
5. Press MEAS to return to the measurement screen.
12.4 DIFFERENTIAL MODE
Your gauge includes a Differential Mode. Set the nominal value of thickness (based upon the
expected thickness value), and the gauge measures the difference (+/-) from this nominal value.
This feature is typically used in QA incoming inspections on pipes, plate stock, coils, etc.
To enable/disable Differential Mode:
1. Select MENU/UTIL/DIFFERENTIAL.
2. Use the LEFT and RIGHT arrows to toggle the DIFFERENTIAL on.
A value will appear to the right of DIFFERENTIAL.
3. Press MEAS to return to the measurement screen, ready to begin taking readings.
To set the Differential value:
1. Enable Differential Mode (see steps above).
2. When DIFFERENTIAL has been enabled and a value is being displayed to the right of the
DIFFERENTIAL label, press ENTER to display the Digits Edit Box.
3. Adjust to suit the measurement application.
4. Press OK to set the differential value and return to the menu screen, or ESC to cancel.
5. Press MEAS to return to the measurement screen.
12.5 POLARITY
The polarity that your gauge detects on can be set to either positive or negative to obtain the best
detection results depending on the specific measurement conditions of your application. Polarity
affects both the gate (above or below the x axis in the RF A-Scan) and the Rectified A-Scan display
(whether the top or bottom half of the RF display is shown.
For further information refer to the Elcometer NDT Knowledge Hub.
To adjust POLARITY:
Set the measurement screen view to RF. The option is found in MENU/TUNE/POLARITY
12.6 PULSE WIDTH
Your gauge has an adjustable pulse width option. Pulse width refers to the duration of time the
pulser is switched on. Pulse width determines the amount of energy transmitted into the material
being tested.
There are three pulse width options:
S
- The Spike option is used for high resolution and general applications and can be considered
PIKE
as the standard setting.
T
- When additional energy is needed for more penetration, the Thin option may be necessary.
HIN
W
- When even more energy is needed for more penetration, the Wide option may be necessary.
IDE
High frequency applications, where resolution is a requirement, may require the Spike or Thin
settings to achieve optimal results. Low frequency applications, where more penetration is a
requirement, may require the Thin or Wide settings, offering increased penetration. The variety of
transducer frequencies and diameters used in conjunction with the pulse width setting, enable you
to fine tune the gauge to your application needs.
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