2. 5BINSTALLATION
Page 7
© 2007 DH Instruments, a Fluke Company
2.3
INITIAL SETUP
Before setting up GPC1, see Section 2.2 for general information on site requirements.
To prepare a GPC1 for check out and operation:
Set up GPC1 (see Section 2.3.1).
Connect drive air (see Section 2.3.2).
Connect the high pressure supply (see Section 2.3.3)
Make the system high pressure gas interconnections (see Section 2.3.4).
2.3.1
SET UP GPC1
To set up GPC1 proceed as follows:
Place GPC1 on the site table in the proper orientation with the front panel controls
conveniently accessible.
Install the mat delivered with the GPC1 accessories on the top, front surface of the
GPC1.
2.3.2
CONNECT PNEUMATIC POWER (DRIVE AIR)
GPC1 requires pneumatic power to drive its pneumatically driven variable volume (PDVV)
(see Figure 3).
The drive air requirements are summarized in Table 2. Since the flow requirements are very
low and cleanliness of the gas is important, the supply is usually regulated Nitrogen or
instrument grade air from a compressed air bottle.
Connect the pneumatic pressure source to the 1/4 in. NPT F connection labeled
PDVV
DRIVE
on the right side of GPC1 housing. Use Teflon
™
tape or another thread sealant to
minimize leakage.
GPC1 must be supplied with NON-LUBRICATED drive air. The internal components are
permanently lubricated. The oil in lubricated air can contaminate the small diameter
tubing inside GPC1 and lead to erratic behavior requiring difficult and costly cleaning.
Table 2.
Pneumatic Power (Drive Air) Requirements
INTERNAL
COMPONENT
DRIVE AIR
PRESSURE NEEDED
MINIMUM
FLOW
LUBRICATION
REQUIRED
CLEANLINESS
CRITICAL
PDVV
For 5 MPa (750 psi):
Supply 300 kPa (45 psi)
For 50 MPa (7 500 psi):
Supply 600 kPa (87 psi)
For 70 MPa (10 000 psi):
Supply 700 kPa (100 psi)
For 110 MPa (16 000 psi):
Supply 850 kPa (120 psi)
200 sccm (< 0.01 scfm)
* This is very low flow.
No Yes
