DH Instruments GFS2102, Руководство по эксплуатации и обслуживанию, Страница: 25 / 206

2. SYSTEM OVERVIEW
Page 9 © 2007 DH Instruments, a Fluke Company
There are two different reference gas cylinder sizes offered with the GFS2102 system, a 1.1
liter cylinder and a 1.5 liter cylinder. The two cylinders are offered to accommodate the
greatly varying gas densities that can be used with the system (see Section 4.1.2). The
cylinders are rated for a maximum working pressure of 20 MPa (3000 psi) for the 1.1 liter
cylinder and 31 MPa (4500 psi) for the 1.5 liter cylinder. During manufacturing, the cylinders
undergo a hydraulic pressure test up to 1.5 times the rated operating pressure.
The cylinders are delivered with appropriate labeling to meet European or US-DOT
requirements depending on the location of the GFS2102 end user.
Figure 6 . 1.5 liter and 1.1 liter reference gas cylinder assemblies
The cylinders’ design life is 15 years from the date of manufacture. At that time, the cylinders
should be replaced. Hydrostatic testing should also be performed on the cylinders every 5
years to ensure safe operation.
Do not expose the reference gas cylinder to temperatures above 56
°
C (133
°
F). If you
suspect that a reference gas cylinder has been heated to temperatures of 56
°
C or more, it
must be hydrostatically retested and fully re-qualified before further use. Reference gas
cylinders exposed to or with evidence of exposure to heat in excess of 72
°
C (162
°
F) must
be condemned and removed from service.
Avoid letting the cylinder come in contact with strong solvents or cleaning agents, vehicle
fluids or corrosive materials as the composite material may be damaged.
For safety, heat dissipation and to maximize the life of the cylinder, filling of the reference gas
cylinder should be performed as described in section 4.3. Also see section 2.8 for an
overview on the GFS Fill Station.
2.2.2 CYLINDER SUPPORT
The reference gas cylinder is supported on the GFS balance by a custom assembly whose
three legs pass through the two plates of the AMH and rest directly on the balance mass tray.