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Dakota Ultrasonics
2. 3" & 6" Steel (type 4140 pt# X-000-0010) – Used for one or two point zero
calibration options in a number of configurations (individual or paired).
3. Triple Path Glass Block (1", 2", 3" pt# X-000-0020) – Most commonly used for
all three points. Two point using 1" & 3", followed by a linear verification point
measured and recorded at 2" after completion of the Two Point procedure.
Note: The temperature sensor should be connected to the gauge with the Temp
Mode set to 'auto', located in the utility menu, then placed on the serial # flat of the
Cal Bar. This will compensate for temperature shifts and avoid measurement errors.
If the triple path glass block will be used as the cal standard, the temp sensor is not
necessary with the temperature coefficient of glass close to 0.
Caution:
A very small amount of "WATER", or other non-intrusive fluid with a similar viscosity,
should be used as the couplant between the transducer and calibration standard
selected. This will avoid creating a couplant film layer between them and cause an
"out of tolerance" condition > +/- 0.001" for the 3" & 6" cal bars, or +/- 0.0005" for the
triple path glass block.
Triple Path Glass Block -
If the operator will be using the glass block for the zero calibration process, there are
only a few changes necessary:
Physical lengths (PHY LEN) will be performed at 1" & 3".
Temperature coefficient (TEMP COEF) will be set to "0".
Recordation of the 2" side in the data group file.
The physical measurements documented on the glass block calibration certificates
were dimensionally measured in the center on all three sides (1", 2", & 3"). The
transducer should be placed in the same location during the calibration process.
The zero calibration procedure is as follows:
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One & Two Point System Zero
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