Admissible temperatures
Operation °C
+5 … +60
Vacuum connection
DN 16 ISO-KF
DN 16 CF-R
°C
°C
80
2)
80
2)
in horizontal moun-
ting orientation
Filament °C
110
Storage
°C
–20 … +65
Relative humidity
%
≤
80 at temperatures up to
≤
+31 °C, decreasing to 50
at +40 °C
Use
indoors only, altitude up to
2000 m NN
Mounting orientation
any
Degree of protection
IP40
Dimensions mm
14
15
DN 16 ISO-KF
DN 16 CF-R
DN 16 ISO-KF
long tube
DN 16 CF-R
long tube
115
11
6
16
33
20.5
69
16
22.5
Weight
PTR26950, PTR21950
PTR26951, PTR21951
g
g
80
100
PTR26960, PTR21960
PTR26961, PTR21961
g
g
130
140
Measurement Signal vs. Pressure
1E+05
1E+04
1E+03
1E+02
1E+01
1E+00
1E–01
1E–02
1E–03
1E–04
1E–05
ov
er
ra
ng
e
Pa
mbar
torr
0.0 0.5 1.0 1.5
2.5
3.5
4.5
5.5
6.5
7.5
8.5
9.5
10.3
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
se
ns
or
er
ro
r
un
de
rr
ang
e
Pressure p
Measurement signal U[V]
p = 10
(U-c)
⇔
U = c + log
10
p
valid in the range 5×10
-4
mbar <p< 1000 mbar
3.75×10
-4
Torr <p< 750 Torr
5×10
-2
Pa <p< 1×10
5
Pa
2)
250 °C with long tube.
U p
c
U p
c
[V] [mbar]
5.5
[V] [micron] 2.625
[V] [µbar]
2.5
[V] [Pa]
3.5
[V] [Torr] 5.625
[V] [kPa]
6.5
[V] [mTorr] 2.625
where p pressure
U measurement signal
c constant (depending on pressure unit)
Gas Type Dependence
Pressure reading (gauge adjusted for air)
10
2
8
6
4
2
10
1
8
6
4
2
10
0
8
6
4
2
10
–1
8
6
4
2
10
–2
8
6
4
2
10
–3
10
–3
2
4
6
10
–2
2
4
6
10
–1
2
4
6
10
0
2
4
6
10
1
2
4
6
10
2
H
2
He
Ne
Xe
Kr
Ar
CO
2
Freon 12
Air
O
2
CO
N
2
p (mbar)
p
eff
(mbar)
Water vapor
Calibration factors for the pressure range below 1 mbar
p
eff
= C × pressure reading
Gas
type
Calibration
factor C
Gas
type Calibration
factor C
He
Ne
Ar
Kr
Xe
0.8
1.4
1.7
2.4
3.0
H
2
air, O
2
, CO, N
2
CO
2
water vapor
freon 12
0.5
1.0
0.9
0.5
0.7
Installation
Vacuum Connection
DANGER
Caution: overpressure in the vacuum system
>1 bar
Injury caused by released parts and harm
caused by escaping process gases can result if
clamps are opened while the vacuum system is
pressurized.
Do not open any clamps while the vacuum sys-
tem is pressurized. Use the type clamps which
are suited to overpressure.
DANGER
Caution: overpressure in the vacuum system
>2.5 bar
KF connections with elastomer seals (e.g.
O-rings) cannot withstand such pressures. Pro-
cess media can thus leak and possibly damage
your health.
Use O-rings provided with an outer centering
ring.
DANGER
Caution: protective ground
Incorrectly grounded products can be extremely
hazardous in the event of a fault.
The gauge must be electrically connected to the
grounded vacuum chamber. This connection
must conform to the requirements of a protective
connection according to EN 61010:
•
CF connections fulfill this requirement.
•
For gauges with a KF connection, use a con-
ductive metallic clamping ring
Caution
Caution: vacuum component
Dirt and damages impair the function of the
vacuum component.
When handling vacuum components, take ap-
propriate measures to ensure cleanliness and
prevent damages.
Caution
Caution: dirt sensitive area
Touching the product or parts thereof with bare
hands increases the desorption rate.
Always wear clean, lint-free gloves and use
clean tools when working in this area.
The gauge may be mounted in any orientation. To
keep condensates and particles from getting into the
measuring chamber preferably choose a horizontal
to upright position and possibly use a seal with a
centering ring and filter. If adjustment should be pos-
sible after the gauge has been installed, be sure to
install it so that the tactile switch can be accessed
with a pin (
→
"Adjusting the Gauge").
bg805178be/ d
(2006-02)
Original: German BG 805 178 BD / D (2006-02)
