VACUUBRAND ME 2S - Manual (Page 24)

page 20 of 24
Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check
carefully the validity of this document with respect to his product. manual-no.: 99 56 52 / 10/07/2007
Individual performance check of a pump head :
Assembling fittings:
If the pump does not achieve the ultimate pressure:
☞ In case the diaphragms and valves have been replaced, a run-in period of several
hours is required before the pump achieves its ultimate vacuum.
If all pump heads achieve a vacuum below 85 mbar but pump does not achieve the
ultimate total pressure:
Check hose connectors between pump heads and manifolds for leaks. If necessary
recheck pump chamber.
➃ ➃ ➃ ➃ ➃
➀ ➀ ➀ ➀ ➀
➁ ➁ ➁ ➁ ➁
➂ ➂ ➂ ➂ ➂
By measuring the pressure at the inlet port of the individual
head:
Use a suitable vacuum gauge (e. g. DVR 2, cat. no.: 68 29 02),
make sure that it is correctly calibrated, and measure the pres-
sure at the inlet port. A vacuum of less than 85 mbar should be
indicated.
☞ If the reading is higher, recheck the pump chamber and make
sure that the valves and the diaphragms are correctly seated
(diaphragms concentric with bore).
➨ Use open-ended wrench to assemble fittings with connec-
tion hoses to all pump heads.
☞ ☞ ☞ ☞ ☞ Attention: When reassembling the housing covers of
pumps type MZ 2D ensure that the head covers are not
exchanged. Always assemble the housing cover with
groove at the outlet side of the pump.
➨ Screw in four socket head screws fixing housing cover cross-
wise (e. g. in the sequence ➀, ➁, ➂, ➃) first slightly, then
tighten.
☞ Do not tighten until head cover is in contact with housing,
torque 12 Nm.