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2. Navigate to OFFLINE MAINT > ZERO > CAL ZERO and select CAL/YES?.
Dots traverse the display while flowmeter zero is in progress.
3. Read the zero result on the display.
The display reports CAL PASS if the zero was successful, or CAL FAIL if it was not.
Postrequisites
Restore normal flow through the sensor by opening the valves.
Need help? If the zero fails:
• Ensure that there is no flow through the sensor, then retry.
• Remove or reduce sources of electromechanical noise, then retry.
• Set Zero Time to a lower value, then retry.
• If the zero continues to fail, contact Micro Motion.
• If you want to return the flowmeter to operation using a previous zero value:
- To restore the zero value set at the factory: OFFLINE MAINT > ZERO > RESTORE ZERO >
RESTORE/YES? . This function requires the enhanced core processor.
Restriction
Restore the factory zero only if your flowmeter was purchased as a unit, it was zeroed at the
factory, and you are using the original components.
11.3.2 Zero the flowmeter using ProLink II
Zeroing the flowmeter establishes a baseline for process measurement by analyzing the
sensor's output when there is no flow through the sensor tubes.
Prerequisites
ProLink II must be running and must be connected to the transmitter.
Procedure
1.
Prepare the flowmeter:
a. Allow the flowmeter to warm up for at least 20 minutes after applying power.
b. Run the process fluid through the sensor until the sensor temperature reaches
the normal process operating temperature.
c. Stop flow through the sensor by shutting the downstream valve, and then the
upstream valve if available.
d. Verify that the sensor is blocked in, that flow has stopped, and that the sensor is
completely full of process fluid.
e. Observe the drive gain, temperature, and density readings. If they are stable,
check the Live Zero or Field Verification Zero value. If the average value is close to 0,
you should not need to zero the flowmeter.
2. Choose ProLink > Calibration > Zero Verification and Calibration.
Measurement support
188 Micro Motion
®
Model 2700 Transmitters with Analog Outputs