INFICON Gemini ATM to Ultra-High Vacuum Gauge - Manual (Page 15)

tina83e1-a (2014-02) 15
2.1 Measuring Signal vs. Pressure
Measurement range 1.5 … 8.5 V (3MAx-xxx-0x0N)
1E–01
1E+00
1E–06
1E–07
1E–08
1E–09
1E–10
0.0 0.5 1.0 1.5 2.5 3.5 4.5 5.5 6.5 7.5 8.5 9.5 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
se
ns
or
er
ro
r
Pressure p
Measurement signal U [V]
1E–02
1E–03
1E–04
1E–05
un
de
rr
an
ge
Pa
mbar
torr
o
ve
rra
ng
e
p = 10
(U-c)
⇔ U = c + log
10
p
valid in the range 1×10
-9
mbar < p < 1×10
-2
mbar
7.5×10
-10
Torr < p < 7.5 ×10
-3
Torr
1×10
-7
Pa < p < 1 Pa
mbar Pa Torr
c 10.5 8.5 10.625
where p pressure
U measurement signal
c constant (pressure unit dependent)