Configuration and Use Manual
00809-0100-1600
Measurement support
November 2022
• ProLink III Basic or Professional
Procedure
1. From ProLink III Basic or Professional, choose one of the following options:
• Device Tools → Diagnostics → Meter Verification → View Previous Test Results
• Smart Meter Verification Overview → Meter Verification → History
2. Select Export Data to CSV File .
3. Save the CSV file to your computer.
4. Locate and open the CSV file.
5. Locate and examine the two columns labeled, SMV Meter Factor LPO and SMV Meter Factor RPO .
• If the field reference point has not been established, the numbers in both columns will be exactly 1.
• If the field reference point has been established, the numbers located in both columns will be close to 1. The SMV Meter Factor LPO and SMV Meter Factor RPO numbers do not have to match.
14.2 Zero the meter
Display
ProLink III
Menu → Service Tools → Verification & Calibration → Meter Zero → Zero Calibration
Device Tools → Calibration → Smart Zero Verification and Calibration → Calibrate Zero
Zeroing the meter establishes a baseline for process measurement by analyzing the sensor's output when there is no flow through the sensor tubes.
Important
In most cases, the factory zero is more accurate than the field zero. Do not zero the meter unless one of the following is true:
• The zero is required by site procedures.
• The stored zero value fails the zero verification procedure.
Do not verify the zero or zero the meter if a high-severity alert is active. Correct the problem, then verify the zero or zero the meter. You may verify the zero or zero the meter if a low-severity alert is active.
Prerequisites
Before performing a field zero, execute the zero verification procedure to see whether or not a field zero can improve measurement accuracy.
Important
Do not verify the zero or zero the meter if a high-severity alert is active. Correct the problem, then verify the zero or zero the meter. You may verify the zero or zero the meter if a low-severity alert is active.
Procedure
1. Prepare the meter: a) Allow the meter 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.
Configuration and Use Manual 147
Measurement support
November 2022
Configuration and Use Manual
00809-0100-1600 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 meter.
2. Modify Zero Time , if desired.
Zero Time controls the amount of time the transmitter takes to determine its zero-flow reference point. The default Zero Time is 20 seconds. For most applications, the default Zero Time is appropriate.
3. Start the zero procedure and wait until it completes.
When the calibration is complete:
• If the zero procedure was successful, a Calibration Success message and a new zero value are displayed.
• If the zero procedure failed, a Calibration Failed message is displayed.
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 customer service.
• If you want to restore the most recent valid value from transmitter memory:
— Using the display: Menu → Service Tools → Verification and Calibration → Meter Zero → Restore
Zero → Restore Previous Zero
— Using ProLink III: Device Tools → Calibration → Smart Zero Verification and Calibration → Calibrate
Zero → Restore Prior Zero
• If you want to restore the factory zero:
— Using the display: Menu → Service Tools → Verification and Calibration → Meter Zero → Restore
Zero → Restore Factory Zero
— Using ProLink III: Device Tools → Calibration → Smart Zero Verification and Calibration → Calibrate
Zero → Restore Factory Zero
Restriction
Restore the factory zero only if your meter was purchased as a unit, it was zeroed at the factory, and you are using the original components.
148 Micro Motion 1600 with Ethernet Transmitters
