Checking Ultramat 7 For Leaks - Siemens SIPROCESS GA700 Compact Operating Instructions

Commissioning
5.4 Checking gas paths for leaks
See also
Service and maintenance (Page 81)
5.4.2.2

Checking ULTRAMAT 7 for leaks

Procedure
1. Close the sample gas/reference gas outlet.
2. Connect the sample gas/reference gas outlet to a pressure measuring instrument
(manometer).
3. Pressurize the sample gas/reference gas path with overpressure of 200 hPa / 400 hPa.
4. Wait for approximately 1 minute until the sample gas/reference gas reaches the ambient
temperature.
5. Note the pressure.
6. Wait approximately 5 minutes. Note the pressure again.
If the pressure change lies under 1 hPa, the sample gas/reference gas path is adequately tight.
Calculation of leakage rate
The measured pressure drop is tested against the maximum permissible pressure drop
(calculated from the above data). If the actual pressure drop is greater, the test is considered
failed.
The following applies to the maximum permissible pressure drop:
Δp= t ∙ Q
Δp = max. pressure drop
t = test duration
Q = leakage rate
L
V = Enclosed volume
The enclosed volume V between gas inlet and outlet is:
Analysis chamber with gas path [AK mm]
0,2
0,6
20
60
90
180
76
/ V
L
2
6
Max. permissible pressure drop
Dp [hPa]
Ex variant
39
36
31
22
14
4
3
1
Compact Operating Instructions, 06/2023, A5E35134047-AB
Max. permissible pressure drop Dp
[hPa]
Non-Ex variant
78
73
63
45
28
9
6
3
SIPROCESS GA700 rack and wall mounted devices