Hardware manual

4-148 Agilent 7500 Series ICP-MS Hardware Manual
4Maintenance
a Slide the cathode plate, cathode tube, and circlip into the top (flange
end) of the body tube.
Use circlip pliers to position the circlip.
b Insert the O- ring into the bottom of the body tube
Wipe the O- ring to remove any lint and insert it into the bottom of the
body tube.
c Insert the anode assembly into the bottom of the body tube using your
fingers.
Do not bend the anode as you insert it through the cathode.
d Screw the collar into the bottom of the body tube.
Center the anode inside the body tube before tightening the collar. Fit the
flat spanner into the collar and twist it clockwise until it is tight.
7 After reassembling the body tube, refer to the “Refitting the Penning
Gauge” section.
Maintaining the Rotary Pumps
The rotary vane pumps are located on the floor, which facilitates the changing
of its oil and emptying its mist filters.
Check the pump’s color and oil level on a monthly basis. It is necessary that
the oil level be between the Minimum and the Maximum on the level gauge. If
the oil is too low, add more oil. If it is above the Maximum, take some out.
Using the tag for oil color reference, check the color of oil. If oil color is bad,
change it. The standard period of time to change the pump oil is about 6
months, though it depends on the daily sample throughput, the type of sample,
the concentration of the sample, etc. Use the MassHunter Workstation (or
ChemStation) maintenance clocks to help determine when to change the oil.
See the section entitled “Maintenance Clocks” earlier in this chapter for
information. The standard period of time to change the mist filter element and
the odor element in the filter element is about one year. If the filter is not
maintained and the element becomes blocked, a pressure relief valve in the
filter will operate and allow dangerous unfiltered exhaust gasses to pass
through the filter.