Changing the source to APPI
1) put instrument into standby mode, exit the Data Acquisition software, double click the icon on the desktop "Remove MassHunter Processes" <--- looks like red and yellow lightning bolt
2) remove ESI source from the TOFMS
3) place APPI source on the mounts on the front of the TOFMS and connect the nebulizer sample and gas lines, DO NOT force the fittings wiggle them around until they screw in smoothly. Close the APPI door, you may need to turn the latch screw a few times to ensure the APPI closes snuggly, do not force anything. Loosen the latch screw when putting the ESI source back on.
4) connect heater cable
6) turn off the instrument by pressing the button on the lower left hand side of the TOFMS, Turn on the power to the APPI via the switch on the surge protector. wait 15 seconds, then press the power button on the TOFMS again to turn the instrument back on
7) wait about 2 minutes until you hear the diverter valve open (you'll hear a loud noise)
8) launch the data acquisition software
9) switch the method to APPI_positive.m
10) wait until all errors clear, after doing a power cycle you may get some nebulizer and vacuum errors but they will go away
11) turn the TOFMS on, right-click on the TOF icon and select on
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removing the source
1) put instrument in standby via data acquisition
2) exit data acquisition software
3) kill all processes (use lightning icon on desktop)
4) remove source from side of instrument
5) power off the  tofms (button on lower left front of instrument)
6) turn off power to APPI via power strip
7) turn on TOFMS