Cameron Scanner 2000 microEFM, Руководство пользователя по оборудованию

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Section 2 Scanner
®
2000 microEFM
5. Monitor the pressure readout and watch for a steady decrease in pressure. If leakage is indicated, depres -
surize the system by opening both bypass/block valves, then check all manifold and piping joints. Tighten
connections as necessary.
6. Repeat steps 3 through 5 to retest the manifold for leaks.
An additional test can verify the condition of the equalizing valves. Assuming the above test has confirmed
the system is leak free, close both equalizing valves and open the vent. Monitor the differential pressure
reading for any change. Repair or replace the manifold as required if the differential pressure varies.
Zero Offset (Static Pressure or Differential Pressure)
The static pressure input for the Scanner 2000 is zeroed at the factory before shipment. However, changes
in temperature and atmospheric pressure can cause the
static pressure and differential pressure readings to vary.
The inputs can be easily zeroed in the field, if necessary,
prior to putting the Scanner 2000 into service.
To zero the static pressure or differential pressure
1. Close the bypass valves to isolate the pressure below
the manifold.
2. Open the equalizer and vent valves.
3.
Connect to the Scanner 2000 with the ModWorX™ Pro software, and apply zero pressure from the Cali-
brate Inputs screen (see the ModWorX™ Pro Software User Manual; Part No. 9A-30165025; for
complete instructions).
Static Pressure Calibration and Verification
Note The pressure range stamped on the MVT is expressed as psia (absolute). However, Scanner 2000
pressure inputs are recalibrated as psig (gauge) at the factory before the device is shipped. There-
fore, pressure readings displayed on the LCD and in the ModWorX Pro software are in terms of psig.
The static pressure and differential pressure inputs are calibrated and verified before the Scanner 2000 leaves
the factory, and recalibration in the field may or may not be required. To comply with API standards for
verification, “as found” readings should be recorded at approximately 0, 50, and 100 percent of the operating
pressure range, increasing, and at 80, 20 and 0 percent of the operating pressure range, decreasing. For
example, the static pressure measurements of a 1500-psi sensor should be verified at 0 psi, 750 psi, and 1500
psi, then at 1200 psi, 300 psi, and 0 psi.
!
WARNING: Do not subject the Scanner 2000 microEFM to unnecessary shock or over-range
pressure during maintenance operations.
To calibrate the static pressure
1. Close the bypass valves to isolate the pressure below the manifold.
2. Open the equalizer valves and vent valve to purge the lines.
3. Close the vent valve.
4. Connect a static pressure simulator to the manifold (either side).
VENT
BYPASS/
BLOCK
EQUALIZER
BYPASS/
BLOCK
EQUALIZER