MPS 500 – User Manual Rev. 2.1
BeamTec GmbH
Wolfgang-Paul-Str. 4, 89081 Ulm, Germany
http:
, e-mail: [email protected] tel.: +49 731 146620-0
50
calibrated for nitrogen or air. If pressure measurements are being
performed with other gases, it may be necessary to correct the reading
accordingly. The Gas Type parameter is used to adjust the correction
factor for the respective gas type. The actual pressure is obtained by
multiplying the measured pressure with the correction factor:
P = P
N
/ S
g
Sg = S
N2
x R
g
where:
P
–
pressure
P
N
–
pressure for N2
S
g
–
sensitivity factor for gas g
S
N2
–
gauge sensitivity for N
2
Rg
–
gas correction factor
The gas type correction becomes a function of the pressure if the pressure
exceeds 0.5 mbar. This fact is taken into consideration for all gas types that
can be selected.
The following gas type correction factors are implemented and can be choose
using the arrow buttons
▲
or
▼
and MENU/ENTER button for each channel
separately: