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Figure 4 Preload tool
BC-0054-A
nEXT 730D, 930D
nEXT 1230H
2
4
1
2
5
7
1
6
3
3
1
Sleeve: the sleeve must be in contact with the spider of the pump while
pressing down the test plunger
2
Correct adjustment
3
Test plunger
4
Marker: the marker must be within the correct adjustment area when hear-
ing the distinct sound.
nEXT730D/930D: only one marker for all pump models.
5
Hole for banana plug
6
Upper marker for pump models with part nos without "INV" (mounted with
the high-vacuum flange on top, preload = 50 N): The marker must be within
the correct adjustment area when hearing the distinct sound.
7
Lower marker for pump models with part nos with "INV" (mounted with the
high-vacuum flange on the bottom, preload = 25 N): The marker must be
within the correct adjustment area when hearing the distinct sound.
4.1 Mounting orientation
nEXT730D and 930D pumps can be mounted in any orientation,
nEXT1230H pumps can be mounted
▪
horizontally or vertically, with the high-vacuum flange on top and in any
orientation in between or
06/2021 - ©Edwards Limited
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300872820_002_C2 - Preload check