Aurora Trace Startup and Shutdown Procedure for Sample System
Contents
1. Startup and Shutdown Procedure for Aurora Trace Sample System Measurement amp Control with Aspirator 916 136 Rev C May 2013 Startup Procedure To start your sample system refer to the figure below and complete the following steps R 4 yy maa D Ge Wies les Wow gt 4 S g IN So Neme POE ike e i eos DN OY Ve re Lt ATO A T p j Ke Lis 1 J i GIE i eae l V WAS D A ere Aurora Trace Sample System with H20 Verifier Option Using Aspirator 1100 Technology Park Drive Billerica MA 01821 4111 Web www ge mcs com ES Startup Procedure for Aurora Trace Sample System May 2013 SSS Oe O l T O O Table 1 Figure Key Sample Gas Isolation Ball Valve Verifier Bypass Valve Sample Gas Bypass Metering Valve Sample Gas Pressure Regulator Sample Gas Pressure Gauge Back Pressure Regulator Orifice Upstream Pressure Gauge Multi Pass Cell Flow Meter WO OI NID nm Ei WwW PM Sample Bypass Flow Meter Process Test 3 Way Valve Aspirator Supply Pressure Regulator Aspirator Supply Pressure Gauge Verifier Isolation 3 Way Valve Verifier Isolation Ball Valve Verifier Bypass Metering Valve Purifier Isolation Ball Valve Purifier Isolation Ball Valve Verifier Bypass Flow Meter 2 of 4 916 136C May 2013 E 1 Before connecting the unit to a gas supply at sample inlet port ensure Sample Gas Isolation Bal2. heated Sample Gas Pressure Regulator Item 4 to its maximal temperature if possible The heated Sample Gas Pressure Regulator Item 4 could be overheated if set at maximal temperature for an extended period of time when there is no gas flowing through it If a standard un heated Sample Gas Pressure Regulator Item 4 is installed in the Aurora Trace sample system follow these steps a Turn the Sample Gas Pressure Regulator Item 4 fully counter clockwise minimum pressure output b Open Item 1 Sample Gas Isolation Ball Valve 3of4 Startup Procedure for Aurora Trace Sample System May 2013 c Turn the Sample Gas Pressure Regulator Item 4 slowly clockwise while observing Item 5 Sample Gas Pressure Gauge to 50 5psig d Slowly open Item 3 Sample Gas Bypass Metering Valve until the desired flow is achieved at Item 9 Sample Bypass Flow Meter 5 Turn Aspirator Supply Pressure Regulator Item 11 clockwise so that Aspirator Supply Pressure Gauge Item 12 reads 65 2psig Air Inlet pressure should be 85psig minimum 6 Setup verification system s orifice flow and bypass flow a Go to Aurora Trace display Main Menu Settings Verifier Diags b Check the following readings e Perm tube temperature Prf warming up to 50 C Preheat temperature Mnf warming up to 50 C e Orifice Flow Orf controlled at 1860 sccm c Slowly adjust Verifier Bypass Metering Valve Item 23 s
3. l Valve Item 1 is closed Make sure all mechanical connections have been properly installed according to section 2 7 in the User 5 Manual Required connections sample inlet and pump discharge 2 Warm up Aurora Trace analyzer and verifier a Make sure power supply lines for Aurora Trace analyzer and multi pass cell heater have been wired properly according to Section 2 7 in the User 5 Manual Turn on power supply for Aurora Trace analyzer This will warm up the verification system and stabilize Aurora Trace analyzer laser temperature Make sure Aspirator Supply Pressure Gauge Item 12 reads zero If not fully turn Aspirator Supply Pressure Regulator Item 11 counter clockwise so that Item 12 reads zero Then turn on power supply to the multi pass cell heater This will warm up the multi pass cell 3 Set up valves positions a Open Items 21 and 22 Verifier Isolation 3 way Valve handle pointing inward Verifier Isolation Ball Valve Fully close Item 2 Verifier Bypass Valve Fully close Item 3 Sample Gas Bypass Metering Valve Close Item 23 Verifier Bypass Metering Valve Open Items 24 and 25 Purifier Isolation Ball Valves Make sure Process Test 3 way Valve Item 10 handle points upward 4 Set upstream pressure to 50 psig If an electrically heated Sample Gas Pressure Regulator Item 4 is installed in Aurora Trace sample system follow these steps a Locate j
4. o that Verifier Bypass Flow Meter Item 26 reads 48 LPH 1 7 SCFH d Wait until Orifice Flow Orf stable at 1860 sccm on display e Adjust Item 23 slightly so that Item 26 reads 60 LPH 2 1 SCFH f Repeat d and e so that Item 26 reads 60 LPH 2 1 SCFH and Orifice Flow Orf stable at 1860 sccm on display 7 Adjust internal sample pressure to 2 5 psia Make sure sample pressure reading psia is configured on Aurora Trace display a Adjust Item 6 Back Pressure Regulator so that Item 7 Orifice Upstream Pressure Gauge reads 12 psig b Allow 15 minutes for system pump down c Observe Item 8 Multi pass Cell Flow Meter to be at full scale 4of4 d Adjust Item 6 Back Pressure Regulator while observing the sample pressure reading on the unit display Set the pressure to read 2 5 0 1 on the display e Re install the pressure regulator adjustment screw cap if an electrically heated Sample Gas Pressure Regulator Item 4 is installed in the Aurora Trace sample system Shutdown Procedure 1 Fully turn Aspirator Supply Pressure Regulator Item 11 counter clockwise so that Aspirator Supply Pressure Gauge Item 12 reads zero 2 Close the Sample Gas Isolation Ball Valve Item 1 to depressurize the system Monitor the Sample Gas Pressure Gauge Item 5 to drop to zero 3 Turn the Sample Gas Pressure Regulator Item 4 fully counter clockwise 4 Turn the Back Pressure Regulator item 6 f
5. ully counter clockwise 5 Close the following valve s Item 3 Sample Gas Bypass Metering Valve Item 21 Verifier Isolation 3 Way Valve Item 22 Verifier Isolation Ball Valve Item 23 Verifier Bypass Metering Valve Item 24 Purifier Isolation Ball Valve Item 25 Purifier Isolation Ball Valve Total sample gas flow rate from Aurora Trace outlets are flow rate from Sample Bypass Flow Meter 9 plus flow rate through multi pass cell Flow rate through multi pass cell is the flow rate drawn by aspirator Flow rate drawn by aspirator varies from unit to unit but it cannot exceed 1 86 slpm when a verification system is installed Sample systems for trace moisture applications will require some time to dry down for reaching the actual process moisture level Typically 12 24 hours operation with process gas flowing at normal flow rates will dry the system but this will vary depending on process conditions length of tubing runs and storage conditions for the Aurora Trace prior to installation Once the analyzer has reached process moisture levels it is recommended to run the verification cycle 6 8 times to ensure all components within are adequately dry to provide accurate verification cycle values 916 136C
6. unction box for setting temperature of the heated Sample Gas Pressure Regulator Item 4 It is right below the heated Sample Gas Pressure Regulator marked as 4 916 136C b Startup Procedure for Aurora Trace Sample System Open junction box cover Make sure temperature is set mid scale If not use a flat head screw driver to set mid scale Allow 15 minutes to warm up Remove the cap covering the Sample Gas Pressure Regulator adjustment screw Item 4 Remove the cap covering the Sample Gas Pressure Regulator adjustment screw Item 4 Using a 5 32 hex driver turn the regulator adjustment screw fully counter clockwise minimum pressure output Open Item 1 Sample Gas Isolation Ball Valve Turn the regulator adjustment screw slowly clockwise while observing Item 5 Sample Gas Pressure Gauge to 50 5 psig Slowly open Item 3 Sample Gas Bypass Metering Valve until the desired flow is achieved at Item 9 Sample Bypass Flow Meter If Sample Gas Pressure Gauge 5 pressure reading oscillates go back to step b and increase temperature set point to the next level Allow 15 minutes to warm up If Sample Gas Pressure Gauge 5 becomes stable raise temperature set point one more level then close junction box If not repeat above process until Sample Gas Pressure Gauge 5 is stable and then raise temperature set point one more level then close junction box Try to avoid setting the
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