18
5.5.3. VCb LARGE CALIBRATION (56.5592 cc SPHERE)
5.5.3.1. INSTALL ONE LARGE 56.5592 cc SPHERE IN THE SAMPLE CELL AND
PLACE THE SAMPLE CELL INTO THE SAMPLE CELL HOLDER. PERFORM THE
STEPS LISTED IN SECTION 5.5.1. (THE PURGE ROUTINE) WITH THE LARGE
CELL CONTAINING THE LARGE SPHERE.
5.5.3.2. OPEN THE TOGGLE VALVES I AND II, AND CLOSE THE GAS IN
TOGGLE VALVE.
5.5.3.3. TURN THE SELECTOR VALVE ON THE FRONT PANEL TO THE CELL
POSITION AND THEN OPEN THE GAS OUT TOGGLE VALVE.
5.5.3.4. TURN THE ZERO ADJUSTMENT KNOB ON THE FRONT PANEL UNTIL A
0.000 PSIG READING IS DISPLAYED ON THE DIGITAL PANEL METER.
5.5.3.5. TURN THE SELECTOR VALVE TO THE REFERENCE POSITION AND
CLOSE THE GAS OUT TOGGLE VALVE.
5.5.3.6. OPEN THE GAS IN TOGGLE VALVE AND, WHEN THE DIGITAL PANEL
METER READS 17.0 PSIG, CLOSE THE GAS IN TOGGLE VALVE.
5.5.3.7. VERIFY THAT THE PRESSURE DISPLAYED ON THE DIGITAL PANEL
METER DOES NOT CHANGE DURING A 10-SECOND PERIOD. TAKE THE bP1
PRESSURE READING ON THE DIGITAL PANEL METER AND ENTER THAT
NUMBER ON THE INSTRUMENT CALIBRATION SHEET IN APPENDIX B.2, ITEM
B.2.7., AS bP1.
.
5.5.3.8. TURN THE SELECTOR VALVE ON THE FRONT PANEL TO THE CELL
POSITION.
5.5.3.9. VERIFY THAT THE NEW PRESSURE DISPLAYED ON THE DIGITAL PANEL
METER DOES NOT CHANGE DURING A 10-SECOND PERIOD. TAKE THE bP2
PRESSURE READING ON THE DIGITAL PANEL METER AND ENTER THAT
NUMBER ON THE INSTRUMENT CALIBRATION SHEET IN APPENDIX B.2, ITEM
B.2.7, AS bP2.
5.5.3.10. CALCULATE THE RATIO bP1/bP2 = bP AND ENTER THIS VALUE AS bP
ON THE INSTRUMENT CALIBRATION SHEET IN APPENDIX B.2, ITEM B.2.7.
5.5.3.11. REPEAT THE STEPS IN SECTIONS 5.5.3.2 TO 5.5.3.11 UNTIL FIVE
CONSECUTIVE bP VALUES FALL WITHIN +/-0.0005 OF EACH OTHER.
To Next Page
Loading...
Need help?
General