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16 Model 2700 Transmitter with PROFIBUS-PA
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Figure 2-7 Configuring an AO function block for pressure compensation – Bus parameters
2.8 Configuring temperature compensation
External temperature compensation can be used with the petroleum measurement application or the
enhanced density application:
• If external temperature compensation is enabled, an external temperature value (or a fixed
temperature value), rather than the temperature value from the Coriolis sensor, is used in
petroleum measurement or enhanced density calculations only. The temperature value from
the Coriolis sensor is used for all other calculations.
• If external temperature compensation is disabled, the temperature value from the Coriolis
sensor is used in all calculations.
Configuring temperature compensation requires two steps:
1. Enabling external temperature compensation (Section 2.8.1)
2. Configuring a temperature source (Section 2.8.2)
2.8.1 Enabling external temperature compensation
To enable temperature compensation, refer to the flowcharts in Figure 2-8.
Figure 2-8 Enabling external temperature compensation
Block: Analog Output Block (Slots 9 and 10)
Index 37 (IN channel), value = 0x0b72
Index 38 (OUT channel), value = 0x0b72
Configure channel
Block: Transducer Block 1 (Slots 11)
Index 121 (AO Compensation), value = 1
Configure channel
MMI Coriolis Flow >
Transducer Block >
Compensation >
Temperature
Enable Disable Ext
Temp
EDD
Block: Transducer Block 1 (Slot 11)
Index 110 (enable temperature compensation)
Enable temperature
comp.
Bus parameters
View >
Preferences
Select Use External
Temperature
Apply
ProLink II