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Temperature Compensation
Variations in material temperature cause changes in sound velocity that may affect the
accuracy of the thickness measurement. The Temperature Compensation feature allows
the user to enter the calibration block temperature and also manually or automatically
input the current (high) temperature at the measurement points. The 37DL PLUS will
display the temperature corrected thickness that can then be saved to the internal
datalogger.
DB Grid View
The Grid View feature allows the user to select either a Min/Max, Alarm, or
A-scan flag to be viewed along with each grid point. This allows the user to quickly scan
through a file and locate Min/Max, Alarm, or A-scan locations.
Optional Oxide/Scale Measurement
This option uses advanced algorithms to measure the thickness of oxide/scale build-up
on the inside of boiler tubes. The gage simultaneously displays the metal thickness of
the boiler tube and the thickness of the oxide layer. Knowing the thickness of the oxide/
scale helps predict tube life. We recommend the use of the M2017 or M2091 transducer
for this application.
Thru-Coat™ Technology
This innovative feature uses a single backwall echo to measure true metal thickness.
The 37DL PLUS can display both metal and coating thickness, each adjusted for their
correct material sound velocity. The gage can be set to display only the true metal
thickness. There is no need to remove the paint or coating from the surface. Thru-Coat
measurements use the new D7906-SM and D7908 dual element transducers.
The 37DL PLUS automatically calculates and displays
both the coating thickness (0.019”) and the material
thickness (0.284”) with a single backwall echo.
The thickness reading of 0.376” is compensated for the
change in material sound velocity due to the tempera-
ture difference between the calibrated temperature and
the material temperature (932°F).
Flags clearly indicate (H) High Alarm and (L) Low Alarm
thickness measurements.
The 37DL PLUS displays the material thickness (0.164”)
and scale thickness (0.011”) simultaneously.
