Waters Xevo TQ MS Operator's, Overview And Maintenance Manual page 198

A Safety Advisories
Mass spectrometer shock hazard
The following warning applies to all Waters mass spectrometers.
Warning:
protective panels. The components they cover are not user-serviceable.
The following warning applies to certain mass spectrometers when they are in
Operate mode.
Warning:
spectrometer is in Standby mode before you touch any of its external
surfaces that are marked with this high voltage warning symbol.
Mass spectrometer flammable solvents warning
This warning applies to mass spectrometers performing an analysis that
requires the use of flammable solvents.
Warning:
enclosed space of a mass spectrometer's ion source, ensure that nitrogen
flows continuously through the source. The nitrogen supply pressure
must not fall below 690 kPa (6.9 bar, 100 psi) during an analysis
requiring the use of flammable solvents. Also a gas-fail device must be
installed, to interrupt the flow of LC solvent should the nitrogen supply
fail.
198 February 11, 2013, 71500130002 Rev. D
To avoid electric shock, do not remove the mass spectrometer's
To avoid nonlethal electric shock, ensure the mass
To prevent ignition of flammable solvent vapors in the