Emerson Network Router User Manual page 57

Transmitter Configuration, Characterization, and Calibration
For T-Series sensors, the optional D3 and D4 calibrations could improve the accuracy of the density
measurement. If you choose to perform the D3 and D4 calibration:
• Do not perform the D1 or D2 calibration.
• Perform D3 calibration if you have one calibrated fluid.
• Perform both D3 and D4 calibrations if you have two calibrated fluids (other than air and
water).
Before beginning density calibration, review the following requirements. To perform a D1 and D2
density calibration, see Figure 5-5. To perform a D3 density calibration or a D3 and D4 density
calibration, see Figure 5-6.
Sensor requirements
During density calibration, the sensor must be completely filled with the calibration fluid, and there
must be no flow through the sensor. This is usually accomplished by closing the shutoff valve
downstream from the sensor, then filling the sensor with the appropriate fluid.
Density calibration fluid requirements
D1 and D2 density calibration require a D1 (low-density) fluid and a D2 (high-density) fluid. You
may use air and water. If you are calibrating a T-Series sensor, the D1 fluid must be air and the D2
fluid must be water.
For T-Series sensors, the D1 calibration must be performed on air.
For T-Series sensors, the D2 calibration must be performed on water.
For D3 density calibration, the D3 fluid must meet the following requirements:
• Minimum density of 0.6 g/cm
• Minimum difference of 0.1 g/cm
The density of the D3 fluid may be either greater or less than the density of water
For D4 density calibration, the D4 fluid must meet the following requirements:
• Minimum density of 0.6 g/cm
• Minimum difference of 0.1 g/cm
D3 fluid. The density of the D4 fluid must be greater than the density of the D3 fluid
• Minimum difference of 0.1 g/cm
The density of the D4 fluid may be either greater or less than the density of water
Installation and Use Manual
CAUTION
CAUTION
3
3
between the density of the D3 fluid and the density of water.
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3
between the density of the D4 fluid and the density of the
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between the density of the D4 fluid and the density of water.
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