VACUUBRAND ME 2SI - Manual (Page 4)

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.: 69 61 30 - 99 56 52 / 18/10/2007
The manometers used are vacuum meters or overpressure manometers with glycerin
filling. The overpressure manometer indicates the overpressure relative to the atmos-
pheric pressure at the place of installation. The vacuumeter indicates the absolute
pressure.
➨ Install and tighten the manometers first (see instructions for use of the pump) or
install the pump with manometer in the room of operation.
➨ Prior to use the reference chambers of some of the manometers (depending on the
model of manometer) have to be ventilated.
☞ Else, not ventilating the manometer may lead to a systematic measuring error.
There are different types of manometers. To ventilate the reference chamber check
which types of manometers are installed at the pump and proceed according to the
given instructions:
A: Manometer with pressure compensation valve
Ventilate the manometer using the pressure compensation valve.
Close the valve after ventilation.
☞ Repeat if necessary until dial shows zero with measuring
connection ventilated to atmosphere.
pressure
compensation
valve
Pierce hole
after installation
C: Manometer with bore at the rear side
Pierce the hole at the rear side of the manometer. Some outflow
of liquid is normal.
☞ Do not tilt pump during transport.
hole
B: Manometer with pin
Ventilate the manometer by lifting the pin. Do not remove the
pin completely!
pin
D: Manometer without bore, pin or pressure compensation
valve
Do not ventilate the reference chamber of this manometer!
Notes prior to the use of the manometers: