Installation
Calculating the SF
6 gas filling pressure
For u sing th e pressure gau g e (tools)
P31--9001EN/02
3/4
01--2011
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GRID
Calculating the filling pressure on site
Measuring
Write the measurements in the corresponding boxes :
Measure the atmospheric pressure in MPa.
A ,
Measure the ambient temperature in °C.
B
Calculating the SF
6
gas filling pressure
Read the values inthe corresponding boxes and write down the results:
Using the table (page 4) ”Relative pressure values for SF
6
gas corrected for temperature,” determine the value ”p
re
”
corrected according to the
ambient temperature (B) "
p
re
C ,
Reference atmospheric pressure value in MPa
D0, 101
Read the local atmospheric pressure value
(A) "
A
--
,
Calculate the atmospheric pressure variation
(D--A) "
E ,
Read the value (C) "
C
+
,
Calculate the assigned relative pressure
(E+C) "
F ,
Filling with SF
6
gas will take place until the
calculated pressure,increased by 0,01 MPa.
+ 0 , 01
(F + 0.01) "
G ,
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