Edwards ELD500 Series, Инструкция по эксплуатации

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D13510840D - Calibrated leak - He 4-6
Page 64
6. Open the vent screw so far, that the pressure drops to the desired pressure. See
Figure 46 , item 3.
7. Close the vent screw.
The CL - He 4-6 is now ready for operation.
Storage when unused
Put the protective cap on the connection flange DN 16 KF and make sure that all valves and
the vent screw are closed. Store the CL - He 4-6 in a lying position or standing upright in the
holder, protected against impact shock and high temperatures.
Maintenance
It is recommended to re-tighten the union nut of the valve from time to time at a torque of
2.5 Nm by turning it in the clockwise direction (how often this will be required will depend on
how much the calibrated leak is being used). Thereafter it must be easily possible to turn the
knob with two fingers.
Applications
Use for vacuum leak detection
The CL - He 4-6 can be fitted by its DN 16 KF flange connection to any leak detector or any
vacuum apparatus and can then be used for tuning the mass spectrometer as well as for
checking response time and detection sensitivity.
To adjust the test leak rate, see
First use or changing the type of gas .
Use for overpressure leak tests (sniffer probe)
The CL - He 4-6 is set up in holder (see Figures 47 and 48 ). By unscrewing the valve at the
swivel nut the CL - He 4-6 becomes accessible for a sniffer probe tip.