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5.5.4. CALCULATION OF VR LARGE AND VC LARGE VOLUMES
5.5.4.1.
FILL IN THE CORRESPONDING CALCULATION SHEET ON
APPENDIX B.2.,
ITEMS B.2.11. AND B.2.12.
VR LARGE =
56.5592 cc [V SPHERE] = 56.5592
(a - 1) - (b - 1)
( a - b )
VC LARGE = VR LARGE
×
( a - l )
5.5.5. LARGE SPHERE RUN
5.5.1. INSTALL ONE LARGE 56.5592 cc SPHERE IN THE SAMPLE CELL CUP AND
PLACE BOTH INTO THE CELL HOLDER. ( THIS IS EQUIVALENT TO FILLING THE
LARGE CUP WITH THE SPHERE INDICATED AS THE SAMPLE.) PERFORM THE
STEPS LISTED IN SECTION 5.6.1. (THE PURGE ROUTINE ) WITH THE LARGE CELL
FILLED.
5.5.2. OPEN THE TOGGLE VALVES I AND II AND CLOSE THE GAS IN
TOGGLE VALVE.
5.5.3. TURN THE SELECTOR VALVE ON THE FRONT PANEL TO THE CELL
POSITION
AND THEN OPEN THE
GAS OUT TOGGLE VALVE.
5.5.4. TURN THE ZERO ADJUSTMENT KNOB ON THE FRONT PANEL UNTIL A
0.000 PSIG READING IS DISPLAYED ON THE DIGITAL PANEL METER
.
CLOSE THE
GAS OUT TOGGLE VALVE.
5.5.5. TURN THE SELECTOR VALVE TO THE REFERENCE
POSITION
AND
CLOSE THE GAS OUT TOGGLE VALVE.
5.5.6. OPEN THE GAS IN TOGGLE VALVE AND, WHEN THE DIGITAL PANEL
METER READS 17.0 PSIG, CLOSE THE GAS IN TOGGLE VALVE.
5.5.7. VERIFY THAT THE PRESSURE DISPLAYED ON THE DIGITAL PANEL
METER DOES NOT CHANGE DURING A 10-SECOND PERIOD. TAKE THE
P1
PRESSURE READING ON THE DIGITAL PANEL METER AND ENTER THAT
NUMBER ON THE LARGE SPHERE RUN DATA SHEET (APPENDIX C, ITEM C.1.2.).
.
5.5.8. TURN THE SELECTOR VALVE ON THE FRONT PANEL TO THE CELL
POSITION.
5.5.9. VERIFY THAT THE NEW PRESSURE DISPLAYED ON THE DIGITAL PANEL
METER DOES NOT CHANGE DURING A 10-SECOND PERIOD. TAKE THE
P2
PRESSURE READING ON THE DIGITAL PANEL METER AND ENTER THAT
NUMBER ON THE LARGE SPHERE RUN DATA SHEET (APPENDIX C, ITEM C.1.2.).
5.5.10. CALCULATE VP = VC - VR
×
((P1/P2) -1), WITH NUMBERS FOR VC AND
VR TAKEN FROM THE CALIBRATION SECTION. VERIFY THAT THE
CALCULATED VALUES ARE WITHIN 0.4 % OF THE EXPECTED VOLUME OF
56.5592 cc. THE UPPER LIMIT IS 56.7854 cc AND THE LOWER LIMIT IS 56.3330 cc.
