◆
The leak rate should be less than 0.02mbar/s for ADT761-D and 0.2bar/s for ADT761-L and ADT761-M or it is
possible the calibrator has a leak.
◆
The ADT761 can also run an automatic leak test (as shown in Section 3.6.1).
4.4 Instability
If the pressure has been unstable for more than 3 minutes in the CONTROL mode, the calibrator will switch to the
STANDBY mode and check for the following:
◆
Make sure all fittings are tightened (Section 3.4.1).
◆
Investigate the system for any potential leaks.
Table
4
-
2
The
criteria
leak
rate
of
the
calibrator
has
a
leak
ADT761
-
LLP
ADT761
-
D
ADT761
-
L
ADT761
-
M
ADT761
-
H
ADT761
-
LA
ADT761
-
MA
ADT761
-
HA
ADT761
-
BP
-
2
.
5
t
o
2
.
5
m
bar
(-
1
t
o
1
i
nH
2
O
)
-
25
t
o
25
m
bar
(-
10
t
o
10
i
nH
2
O
)
-
0
.
95
t
o
2
.
5
b
ar
(-
13
.
5
t
o
35
p
si
)
-
0
.
95
t
o
2
.
5
b
ar
(-
13
.
5
t
o
35
p
si
)
-
0
.
95
t
o
2
.
5
b
ar
(-
13
.
5
t
o
35
p
si
)
0
.
05
t
o
3
.
5
b
ar
.
a
(
1
.
2
t
o
50
p
si
.
a
)
0
.
1
t
o
3
.
5
b
ar
.
a
(
1
.
7
t
o
50
p
si
.
a
)
0
.
1
t
o
3
.
5
b
ar
.
a
(
1
.
7
t
o
50
p
si
.
a
)
100
to
1200
h
Pa
-
25
t
o
25
m
bar
(-
10
t
o
10
i
nH
2
O
)
-
0
.
95
t
o
1
b
ar
(-
13
.
5
t
o
15
p
si
)
0
to
7
b
ar
(
0
t
o
100
p
si
)
0
to
25
b
ar
(
0
t
o
375
p
si
)
0
to
40
b
ar
(
0
t
o
600
p
si
)
0
.
05
t
o
8
b
ar
.
a
(
1
.
2
t
o
115
psi
.
a
)
0
.
1
t
o
26
b
ar
.
a
(
1
.
7
t
o
390
p
si
.
a
)
0
.
1
t
o
41
b
ar
.
a
(
1
.
7
t
o
615
p
si
.
a
)
N
/
A
0
.
01
0
.
01
0
.
2
0
.
2
0
.
2
0
.
2
0
.
2
0
.
2
0
.
2
0
.
01
0
.
2
0
.
2
2
2
0
.
2
2
2
N
/
A
Model
Range
Range
Critical
leak rate
(mbar/s)
Critical leak rate
(mbar/s)
Pressure
Module
1
Pressure
Module
2
49
Содержание ADT761 Series
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