Panametrics CGA 351, User Manual, Page: 15 / 119

CGA 351 User’s Manual 9
Chapter 2.
2.1.3 Mounting the CGA 351
This section explains how to mount the analyzer components at the installation site and how to connect the sample
system to the analyzer.
Note: If more than one analyzer system is being installed, be aware that each system is a matched set (i.e., each
sensor enclosure must be matched to a specific electronics enclosure). Refer to the identification tags on the
enclosures to match the systems correctly.
IMPORTANT: For compliance with the European Union’s Low Voltage Directive (73/23/EEC), the CGA 351 requires an
external power disconnect device such as a switch or circuit breaker. The disconnect device must be
marked as such, clearly visible, directly accessible, and located within 1.8 m (6 ft) of the unit.
IMPORTANT:
This symbol indicates Caution - risk of electric shock:
Refer to Figure 5 on page 13, and complete the following steps to mount the CGA 351:
1. Select a flat surface on a vertical wall or instrument panel with sufficient space to hold the mounting plate with
both of the CGA 351 enclosures.
Note: Mount the system in an upright position, so that the sample inlet and outlet fittings are on the bottom of the
sensor enclosure.
2. Using the mounting dimensions shown in Figure 5 on page 13, locate and prepare four (4) mounting holes or two
(2) horizontal mounting rails on the vertical surface.
3. Secure the system to the mounting surface with four (4) sets of mounting hardware. Be sure that the enclosures
are in a vertical position, with the inlet/outlet connectors on the bottom.
4. The flowmeter, which is fastened to the right side of the sensor enclosure, is connected to the discharge port on
the bottom of the unit with a length of 6mm stainless steel tubing. Make sure that the factory-installed Swagelok
fittings are secure.
5. A flow control valve is attached to the inlet port on the bottom of the sensor enclosure with 6mm stainless steel
tubing and Swagelok fittings. Point the valve in the proper direction to receive the inlet piping from the sample
system, and securely tighten the fittings.
2.1.4 Connecting the Sample System
The sample system should be located so that it is able to deliver a sample at a flow rate of 400 ±40 cc/min. For best
results, mount the sample system as close as possible to the CGA 351. An ideal location would be on the same panel,
just below the analyzer. If there are questions, consult with an applications engineer at the factory.
See Figure 5 on page 13, and complete the following steps to connect the sample system to the analyzer:
1. Using 6mm stainless steel tubing (or ¼” stainless steel tubing with adaptors), connect the gas source from the
sample system to the Swagelok fitting on the flow control valve at the inlet port on the analyzer.
2. Using 6 mm stainless steel tubing (or ¼” stainless steel tubing with adaptors), connect the Swagelok outlet fitting
at the top of the flowmeter on the analyzer to the gas discharge connection on the sample system.
Note: If desired, a suitable sample system may be ordered directly from the factory. The sample system would be
supplied fully assembled on a flat plate with four (4) mounting holes.