QUANTACHROME INSTRUMENTS MVP-6DC, Operating Manual

Page 1: ...1 MULTIPYCNOMETER Instrument Models MVP 6DC MVP D160E OPERATING MANUAL P N 05034 Rev F Quantachrome Instruments 2012 2014...

Page 2: ...t will be made to secure repair or replacement if found to be defective Warranty becomes void in the event of modifications or repairs by persons other than Quantachrome s service personnel unless per...

Page 3: ...tial damages due to delays No liability shall result from delay in performance or non performance of this agreement directly or indirectly caused by fire explosion accidents flood labor trouble or sho...

Page 4: ...ssign a return authorization number and record the reason for return Seller will examine returned part to determine the actual cause if any leading to Buyer s return If Product has a manufacturing def...

Page 5: ...Transducer 11 Pressure Relief Valve 12 Calibration Status 12 RS232 Port 12 III SAMPLE PREPARATION 13 Purging Method 13 Vacuum Method 13 IV SAMPLE ANALYSIS 14 Stepwise measurement instructions 14 Dens...

Page 6: ...5 cm3 LARGE SAMPLE CELL VOLUME Vc large __________cm3 LARGE REFERENCE VOLUME VRef large __________cm3 SMALL SAMPLE CELL VOLUME Vc small __________cm3 SMALL REFERENCE VOLUME VRef small __________cm3 MI...

Page 7: ...aining the sample cell with sample Figure 1 is a flow diagram of the MULTIPYCNOMETER The shaded area represents the known reference volume s VR After the system is purged with analysis gas the valve t...

Page 8: ...C 2 4 or V P P V V P P R 2 1 S C a 2 5 Then V P P P P V V R a 2 2 1 S C 6 Since Pa is made to read zero on the digital meter that is all pressure measurements are relative to Pa equation 6 becomes V...

Page 9: ...al number plate at the rear of the unit If the selector needs to be changed refer to the diagram below and carefully follow these steps 1 Make sure the unit is switched OFF and unplug the power cord f...

Page 10: ...e the sample cell insert the lift out tool into one of the holes near the top of the cell and lift it out of the holder Sample cells should be removed from the unit before being filled with sample or...

Page 11: ...w of gas in to the unit is stopped using the GAS FLOW IN ON OFF toggle valve The VENT needle valve controls the rate at which pressure is released when venting the sample cell and reference volume or...

Page 12: ...be heard and will prematurely empty your cylinder Therefore the cylinder regulator should be set at only slightly more than 20 psig 138 kPa Calibration Status The MULTIPYCNOMETER was calibrated at th...

Page 13: ...fully counter clockwise 6 Turn the GAS FLOW IN RATE needle valve fully clockwise Do not over tighten it Open the GAS FLOW IN ON OFF toggle valve 7 Adjust the GAS FLOW IN RATE needle valve to give a sl...

Page 14: ...lized This value is P2 in Equation 8 10 Vent the pressure slowly to prevent blowing powder out of the cell by opening the VENT toggle valve with the VENT RATE needle valve slightly open 11 Use equatio...

Page 15: ...SAMPLE WEIGHT W2 W1 ____________ g CALCULATE SAMPLE VOLUME P P V V V 2 1 R C S 1 VS Volume of sample cm3 VC Volume of Sample cell holder cm3 VR Reference Volume cm3 P1 Pressure reading after pressuri...

Page 16: ...the large cell Insert the large cell into the cell holder replace and secure the cap 2 Open toggle valves I and II 3 Turn the selector valve to CELL 4 Open the VENT toggle and RATE valves 5 Open the...

Page 17: ...pressure in VR large VC large with the sphere in the cell 17 After solving equation 9 for VR large use this value in equation 10 to calculate VC large for the large sample cell 1 large P large P larg...

Page 18: ...elector valve to CELL 27 When the display is again stable note the new pressure reading 28 Vent both the reference volume and cell holder by opening the VENT toggle valve 29 Remove both calibration sp...

Page 19: ...m that used to calibrate the instrument the MULTIPYCNOMETER should be recalibrated at the new temperature Calibration Spheres The table below shows the various spheres that are available for calibrati...

Page 20: ...ess that the weight measured 2 Contaminants fill pores causing a larger sample volume to be determined 3 Volatile impurities will cause erroneous readings Successive volume determinations yielding res...

Page 21: ...ple cell holder Pressure transducer Gas input connection 25 psig pressure relief valve Gas Flow In On Off Gas Flow In Rate Selector valve Vent Open Close Vent Rate II I a b c VRmicro a VRsmall a b VRl...