Solid-state water meters provide innovative all-electronic metering technology designed to reduce maintenance, improve accuracy and durability, and minimize water loss. The electronic watch is free of moving parts and offers low flow accuracy and high flow durability. These meters have a long service life and reliable long-term accuracy in all flow ranges.
Although electronic meters are virtually maintenance-free, a utility commission or other regulatory agency may need to perform continuous meter testing.
In addition, water meter testing is an important part of the water audit plan for utilities. Water audits provide water usage information to utilities and help detect leaks in distribution systems. This allows the utility company to account for the water that is actually delivered, resulting in potentially lost revenue. Water meter accuracy is an important part of any water auditing program, and the best way to determine whether a water meter is operating correctly is to test it.
Steps:
These steps provide the correct process for testing solid-state electronic flow meters.
1. Place the meter on the test bench. Clamp the meter firmly, but do not overtighten it. Make sure that the instrument hole axis is centered inside the test bench pipe.
2. Pour water into the system to remove residual air. The purge should last approximately one minute and reach or approach the maximum rated flow of the meter to ensure that the system and meter have been completely purged.
3. Record the start reading of the meter.
4. For new meter tests, start with a high flow test and then down to a lower flow. This ensures that any fine air bubbles in the residual air are removed within the first few seconds of the entire test process. The flow meter flow tube must be filled to avoid empty tubes. For discontinued meters, the meter may need to be fully hydrated before starting the test.
5. Open the test bench drain valve to the required flow for maximum flow testing.
6. Continue flowing at maximum flow until the meter reaches the required flow.
7. Record the results of this test.
8. To determine the accuracy of the meter after each test, divide the consumption indicated by the meter under test by the volume of the total fuel tank or reference meter.
9. If the meter does not operate within the expected standard range, repeat the test to confirm repeatability. If the second test provides acceptable results, run the test again. If the second test does not produce acceptable results, consult the manufacturer's manual or contact the technical support team.
10. Repeat steps 2 to 8 for the intermediate and minimum flow tests. Especially for the minimum flow test, it is important to verify that the actual test flow closely matches the target flow.
11. After the test is complete, remove the meter from the test bench.
High Precision Ultrasonic Flowmeter Water Meter Sensor
Other matters needing attention
Use sufficient test volume at the minimum flow rate. A higher number of tests helps eliminate system or test errors.
When testing multiple meters in sequence, the system pressure and the distance between the meters may affect the test accuracy.
Avoid testing electronic meters downstream of other meters, and provide sufficient straight pipes upstream of each meter. Other types of meters that have been tested in front of electronic meters, such as mechanical meters, may cause interference. When testing multiple meters online, first place the electronic meter in a bench test and then place other types of meter.
Solid-state electronic meters provide better reading resolution than most mechanical watches. This provides a more accurate test than the intuitive reading of mechanical meter readings through the position of the test ring. Operator understanding of these increased reading resolutions also eliminates preventable errors in test records.
Insufficient volume or insufficient resolution of the reference instrument will cause test errors.
By adjusting test procedures to avoid errors caused by insufficient traffic and / or traffic interference, utilities can avoid making potentially expensive metering decisions based on incorrect test data.
Due to its increased accuracy and reduced maintenance requirements, solid-state electronic water meters have become more and more choices for water companies. If instrumentation testing is required, following accurate testing procedures will help utilities make sound business decisions and increase profitability.
Although electronic meters are virtually maintenance-free, a utility commission or other regulatory agency may need to perform continuous meter testing.
In addition, water meter testing is an important part of the water audit plan for utilities. Water audits provide water usage information to utilities and help detect leaks in distribution systems. This allows the utility company to account for the water that is actually delivered, resulting in potentially lost revenue. Water meter accuracy is an important part of any water auditing program, and the best way to determine whether a water meter is operating correctly is to test it.
Steps:
These steps provide the correct process for testing solid-state electronic flow meters.
1. Place the meter on the test bench. Clamp the meter firmly, but do not overtighten it. Make sure that the instrument hole axis is centered inside the test bench pipe.
2. Pour water into the system to remove residual air. The purge should last approximately one minute and reach or approach the maximum rated flow of the meter to ensure that the system and meter have been completely purged.
3. Record the start reading of the meter.
4. For new meter tests, start with a high flow test and then down to a lower flow. This ensures that any fine air bubbles in the residual air are removed within the first few seconds of the entire test process. The flow meter flow tube must be filled to avoid empty tubes. For discontinued meters, the meter may need to be fully hydrated before starting the test.
5. Open the test bench drain valve to the required flow for maximum flow testing.
6. Continue flowing at maximum flow until the meter reaches the required flow.
7. Record the results of this test.
8. To determine the accuracy of the meter after each test, divide the consumption indicated by the meter under test by the volume of the total fuel tank or reference meter.
9. If the meter does not operate within the expected standard range, repeat the test to confirm repeatability. If the second test provides acceptable results, run the test again. If the second test does not produce acceptable results, consult the manufacturer's manual or contact the technical support team.
10. Repeat steps 2 to 8 for the intermediate and minimum flow tests. Especially for the minimum flow test, it is important to verify that the actual test flow closely matches the target flow.
11. After the test is complete, remove the meter from the test bench.
High Precision Ultrasonic Flowmeter Water Meter Sensor
Other matters needing attention
Use sufficient test volume at the minimum flow rate. A higher number of tests helps eliminate system or test errors.
When testing multiple meters in sequence, the system pressure and the distance between the meters may affect the test accuracy.
Avoid testing electronic meters downstream of other meters, and provide sufficient straight pipes upstream of each meter. Other types of meters that have been tested in front of electronic meters, such as mechanical meters, may cause interference. When testing multiple meters online, first place the electronic meter in a bench test and then place other types of meter.
Solid-state electronic meters provide better reading resolution than most mechanical watches. This provides a more accurate test than the intuitive reading of mechanical meter readings through the position of the test ring. Operator understanding of these increased reading resolutions also eliminates preventable errors in test records.
Insufficient volume or insufficient resolution of the reference instrument will cause test errors.
By adjusting test procedures to avoid errors caused by insufficient traffic and / or traffic interference, utilities can avoid making potentially expensive metering decisions based on incorrect test data.
Due to its increased accuracy and reduced maintenance requirements, solid-state electronic water meters have become more and more choices for water companies. If instrumentation testing is required, following accurate testing procedures will help utilities make sound business decisions and increase profitability.