Inaccurate Flow Rate Or Batch Total - Emerson Micro Motion Installation Manual

Troubleshooting
continued

Inaccurate flow rate or batch total

Table 3. Troubleshooting inaccurate flow rate or batch total
Procedure
1. Check for the proper flow
calibration factor
2. Check the flow units
3. Make sure the flowmeter was
zeroed properly
4. Is the flow measurement
configured for mass or volume?
5. Check for the proper density
calibration factor
6. Make sure the density reading is
accurate for the fluid
7. Make sure the temperature
reading is accurate for the fluid
8. Is the flow measurement
configured for mass or volume?
9. Is the reference total based on a
fixed density value?
10. Change flow units to mass flow
units
11. Check for faulty or improperly
installed grounding
12. Check for two-phase flow
13. Check the scale (or reference
measurement) for accuracy
14. Check for faulty or improperly
installed flowmeter wiring
15. Run a new batch and check again
for an inaccurate rate or total
16. Contact Micro Motion
44
Symptom
The flowmeter indicates a flow rate or batch total that does not agree
with a reference rate or total.
Troubleshooting instructions
To troubleshoot an inaccurate flow rate or batch total, you will need one
of the communications devices listed on page 46 or a transmitter with a
display. Refer to the table below for the necessary steps to troubleshoot
an inaccurate rate or total.
Instructions What to do next
See page 49 • If the flow cal factor is correct, go to step 2
• If the flow cal factor is incorrect, change it, then go to step 15
See page 46 • If the flow units are OK, go to step 3
• If the flow units are wrong, change them, then go to step 15
See page 39 • If the flowmeter was zeroed properly, go to step 4
• If the flowmeter was not zeroed properly, zero it, then go
to step 15
See page 46 • If the configuration is for mass, go to step 6
• If the configuration is for volume, go to step 5
See page 49 • If the dens cal factor is correct, go to step 6
• If the dens cal factor is incorrect, change it, then go to
step 15
See page 50 • If the density reading is correct, go to step 7
• If the density reading is wrong, go to step 11
See page 50 • If the temperature reading is correct, go to step 8
• If the temperature reading is wrong, go to step 14
See page 46 • If the configuration is for mass, go to step 11
• If the configuration is for volume, go to step 9
• If the total is based on a fixed value, go to step 10
• If the total is not based on a fixed value, go to step 11
See page 46 • Go to step 15
See page 51 • If the grounding is OK, go to step 12
• If the grounding is incorrect or faulty, fix it, then go to step 15
See page 53 • If there is no two-phase flow, go to step 13
• If there is two-phase flow, fix the problem, then go to step 15
Use your plant • If the scale is accurate, go to step 14
procedures • If the scale is not accurate, fix it, then go to step 15
See page 47 • If the flowmeter wiring is OK, go to step 16
• If the flowmeter wiring is incorrect or faulty, fix or replace it,
then go to step 15
• If the rate or total is correct, you've solved the problem
• If the rate or total is wrong, start over at step 2 or go to
step 16
Phone numbers are
listed on page 41
®
Micro Motion Model D and DT Sensors Instruction Manual