Cameron Scanner 3100 EFM - Measuring Compensated Liquid via a Turbine Meter; Best Practices

a. Make sure the shut-off valves in the tubing near the meter pressure taps are closed, and the meter is lled with
process uid.
b. Open the equalizer and bypass/block valves on the block manifold. Make sure the vent valve is closed.
c. Open one of the shut-off valves near the meter.
d. Slowly loosen the corresponding vent screw on the MVT, and throttle the rate of ow from the vent with the
shut-off valve.
e. When air bubbles are no longer visible around the MVT vent, tighten the MVT vent screw.
f. Repeat steps 7a through 7e for the other leg.
g. Proceed to step 9.
8. If a uid other than the process uid is to be used, bleed air from the lines as follows:
a. Make sure the shut-off valves in the tubing near the pressure taps are open.
b. Open the equalizer and bypass/block valves on the block manifold. Ensure the vent valve is closed.
c. Remove the vent screw from one side of the MVT and insert a tting to allow connection of a hand pump or
funnel. If a funnel is used, attach a length of Tygon tubing long enough to elevate the funnel well above the
meter pressure taps to force the uid up the legs.
d. Connect a hand pump or funnel to the tting.
e. Estimate the amount of ll uid required to ll the tubing and push any air bubbles into the meter.
f. Pour ll liquid into the funnel, tapping the tubing occasionally to dislodge any bubbles.
g. When the leg is full of uid, remove the tting from the MVT vent and quickly replace the vent screw and
tighten.
h. Repeat steps 8a through 8g for the other leg.
9. Perform a manifold leak test as described in Performing a Manifold Leak Test, page 51.
10. Verify the zero offset, if required (and other calibration points, if desired). See the Scanner 3100 Web Interface User
Manual for complete instructions. See also Zero Offset (Static Pressure or Differential Pressure), page 51, Differen-
tial Pressure Calibration and Verication, page 53, and Static Pressure Calibration and Verication, page 52.
CAUTION Do not put the Scanner into operation until the valves are positioned properly so that pressure is
supplied to both sides of the MVT. For instructions on proper valve positions, see Placing the Scan-
ner into Operation, page 54.
Measuring Compensated Liquid via a Turbine Meter
Best Practices
The Scanner 3100 calculates temperature- and pressure-compensated liquid ow through a turbine meter in accordance
with API MPMS Ch. 11.1 and the measurement principles upon which the AGA 7 standard is based. When you supply a
linear or multipoint calibration factor, the instrument performs the required compensation calculations based on the RTD
and/or pressure inputs.
For optimum performance, ensure that the turbine and Scanner 3100 installation complies with the industry recommen-
dations listed below:
• Install the turbine owmeter in the meter run such that there are at least 10 nominal diameters of straight pipe
upstream and 5 nominal diameters of straight pipe downstream of the meter. Both inlet and outlet pipe should be of
the same nominal size as the meter.
• Straightening vanes are recommended for eliminating swirl conditions. If used, they should be installed 5 diameters
of straight pipe upstream of the meter. If a pressure transducer is installed, it is recommended that it be placed
upstream of the ow straightener.
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Section 2 Scanner 3100 EFM