Sound pressure, measured at ultimate vacuum
1 metre from the end of the pump to ISO 3744
and ISO 4871
57 dB (A)
Vibration: measured at the inlet port (ISO 3744) Class 1C...< 4.5 mm s-
1
(rms radial)
*Use at higher inlet pressure speeds up the tip seal wear.
†Enhanced version is not limited for maximum chamber volume or number of cycles per
hour.
3.2.1 Performance characteristics
The position of the gas ballast control defines the performance characteristics of the
pump.
Note:
Does not apply to No Gas Ballast variants
Table 3
Performance characteristics
Gas ballast control
position
XDS35i Ultimate
total pressure
(mbar)
XDS35iE Ultimate
total pressure
(mbar)
Gas ballast flow
(l min
-1
)
0
< 0.01
< 0.03
-
1
< 0.02
< 0.04
3
2
< 10.0
< 10.0
12
Figure 2 Performance characteristics of XDS35i
Note:
XDS35i can operate with high peak power for 90 seconds before activation of a thermal
protection algorithm which reduces rotational and pumping speed.
Page 13
A73001880_M - Technical data
