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140 Micro Motion
®
Series 3000 MVD Transmitters and Controllers
Startup Procedures
Milliamp outputs
Refer to Figure 16-2 to access and set the output levels of milliamp outputs.
1. Select the milliamp output to be set.
2. Use the cursor control buttons to change the output value.
3. Press
SAVE to set the output level.
4. Check the receiving device to ensure that the correct output level is being received.
When you exit to the Simulate Outputs screen, the milliamp output is released and is again controlled
by the application.
If the difference between the output level sent by the Series 3000 device and the output level received
by the receiving device is not acceptable for your application, perform a milliamp output trim. See
Section 16.5.
Frequency output
Refer to Figure 16-2 to access and set the output levels of the frequency output.
1. Select the frequency output.
2. Use the cursor control buttons to change the output value.
3. Press
SAVE to set the value.
4. Check the receiving device to ensure that the correct output level is being received.
When you exit to the Simulate Outputs screen, the frequency output is released and is again controlled
by the application.
16.5 Milliamp output trim
A milliamp output trim creates a common measurement range between the Series 3000 device and the
device that receives the mA output. For instance, a Series 3000 device might send a 4 mA signal that
the receiving device reports incorrectly as 3.8 mA. If the Series 3000 device output is trimmed
correctly, it will send a signal appropriately compensated to ensure that the receiving device actually
indicates a 4 mA signal.
You must trim the outputs at both the 4 mA and 20 mA points to ensure appropriate compensation
across the entire range of outputs.
To perform a milliamp output trim:
1. Connect a digital multimeter (DMM) or other reference device to the primary or secondary
milliamp wiring terminals. Ensure that the reference device is connected in series. Table 16-1
lists the terminals to which the reference device should be connected.
2. Ensure that the reference device is set to read milliamps.