RMG TRZ 03, Руководство по эксплуатации, Страница: 27 / 78

1 Introduction
Manual TRZ 03· EN08 ·2018 September, 10th
23
Calculation: Z
p(total)
= 3000 + 1260
= 4260

4
2
150
650
3 , 1 4260
  = 
p
= 4,2 mbar
1.12 Pressure tap
A pressure tap has been provided to connect the pressure transducer of a volume
corrector or a pressure gauge to read the pressure at measurement conditions
prevailing
inside the gas meter. This pressure tap is identified by “p
r
”.
1.13 Using gas meters with different types of
gases
Gas type Symbol Density
at 0°C
1,013
bar
Meter
housing Comments
Acid gas Special Special measuring element
Air 1,29 Standard
Ammonia NH
3
0,77 Standard O-rings / lubrication
Argon Ar 1,78 Standard
Butane C
4
H
10
2,70 Standard
Carbon dioxid CO
2
1,98 Standard Excepion: food industry
Carbon monoxid CO 1,25 Standard
Ethan C
2
H
6
1,36 Standard
Ethylene (gaseous) C
2
H
4
1,26 Standard Special design
Freon (gaseous) CCI
2
F
2
5,66 Standard O-rings / lubrication
Helium He 0,18 Standard Reduced measuring range
Hydrogen H
2
0,09 Special Reduced measuring range
Hydrogen sulphide
(0,2%) H
2
S 1,54 Special Special measuring element
Methane CH
4
0,72 Standard
Nitrogen N
2
1,25 Standard