eFlo 2.0 Electronic Flow Meter Operations Manual
Super Systems Inc.
Page 38 of 39
Page 38 of 51
Appendix 2: Verification Procedures
Calibration Verification
The following procedure should be used for verifying the calibration of the flow meter
Items needed
Calibrated Manometer with a usable range of 0 – 27.7 ”wcg (0 – 1 PSI)
Certificate of Calibration for the meter being verified
Procedure
1.
Connect the high and low pressure ports of the manometer to the high and low pressure
ports of the flow meter with the necessary tubing. Open the ball valves
2.
Using the Verification Data section of the Certificate of Calibration, enter a flow setpoint
based on the points given
3.
Once setpoint has been achieved, verify the differential pressure on the manometer is
within the tolerance indicated for that point in the Verification Data section
a.
If the differential pressure reading is out of tolerance, verify the pressure and
temperature values match the values listed under the “Calibration Condition”
section of the “Certificate of Calibration”. If the values are different, you will
need to use the equation given on the cert, along with the actual pressure and
temperature readings to obtain new differential pressure points. These values
can be found in the keypad in the setup menu under the P1.10 & P1.20
parameters or in the touchscreen Process Variable Menu.
4.
Once the verification is complete, close the high and low pressure port ball valves and
remove the manometer and tubing
5.
If the meter is determined to be out of tolerance, continue to the “Sensor Accuracy
Verification” section of the manual
6.
If the sensors are determined to be within tolerance but the flow rates are not, the
meter may need to be recalibrated by SSI if necessary. Please contact SSI for next
steps.
Sensor Accuracy Verification
The following procedure should be used for verifying the accuracy of the installed pressure
sensors
Items needed
Calibrated Manometer with a usable range of 0 – 27.7 ”wcg (0 – 1 PSI)
Procedure
1.
Connect the high and low pressure ports of the manometer to the high and low pressure
ports of the flow meter with the necessary tubing and open the ball valves
2.
Go to the “Process Variables” section of the setup menu and check the indicated
differential pressure reading. This is found in the P1.30 parameter of the keypad or the
Process Variable menu of the touchscreen.