Specifications

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3BUS 208 000 R1301150 Measurement Setup
Fine Tuning ATC with dBWDT
Fine tuning ATC involves monitoring the measurement response to an artificially
induced temperature gradient. For this procedure you will need two people and a
800–1200 Watt heat gun. Using a larger heat source will damage the sensor heads.
Begin with the head package in the off–sheet position without a sample in the gap.
1. Position the heating device in the machine direction at the front of the sensor
package, exactly in line with the windows and parallel with the surface. Hold
the heat source steady and 12 - 18 inches away from the sensor. See Figure 6-15.
Figure 6-15 Heat Source for Fine Tuning dBWdT
2. Turn on the heat source and let the temperature stabilize for one minute.
3. Perform several sample checks with the heat source on.
4. Average the values of the STANDARD WT from the sample checks.
The value of STANDARD WT, after heating the sensor, should be 0
± 0.2 G/M
2
.
The value of PPT, after heating the sensor, should be 1002 to 1005 units. This
range indicates a reasonable temperature change. If the PPT value is greater
that 1005 units, reduce the heat.
Heat Gun