15 • Hardware Setup
8.
Install the 3 foot long 3/16 inch ID tubes that are included with the SDM-2012
on the GAS 1 and GAS 2 fittings. GAS 1 and GAS 2 tubing from multiple units
can be daisy chained together in a manifold for more convenient operation.
See "Assembling a Manifold for Multiple SDM-2012 Units" below for
instructions.
9.
Connect the provided USB cord from the type B USB port on the back of the
SDM-2012 to an available USB port on your computer or to a USB hub that is
connected to your computer. See “USB Hub Requirements for Multiple Station
Systems” on page 12 for more information about USB hubs.
Assembling a Manifold for Multiple SDM-2012 Units
Up to 10 SDM-2012s can be manifolded together and draw from one gas cylinder. If
you only have standard 4-gas GX-2012s, you only need to create a manifold for the
GAS 1 fitting. If you have a standard 4-gas GX-2012 plus a %volume sensor, you will
need to create one manifold for the GAS 1 fitting and another manifold for the GAS 2
fitting. If you have a Gas Tracer of any configuration, you will need to create one
manifold for the GAS 1 fitting and another manifold for the GAS 2 fitting. The exhaust
lines can also be manifolded together and be routed away from the docking stations
with only one 10 foot long 5/16 inch piece of tubing.
Each SDM-2012 is shipped with exhaust tubing, GAS 1 and GAS 2 tubing, T-fittings
in two different sizes, and a check valve.
Exhaust Tubing
Reference Figure 15 for the instructions below.
1.
Cut a 1-2” piece of 5/16 inch tubing for each SDM-2012 and connect it to each
unit’s exhaust fitting.
2.
Connect the provided check valves to the short pieces of tubing already
installed at the exhaust fittings. Be sure that the arrows that appear on the
check valve are pointing away from the exhaust fitting.
3.
Cut a 2-3” piece of 5/16 inch tubing for every SDM-2012 except the first one
and connect it to the other end of the check valve.
4.
Insert the larger T-fittings into the tubing so that the remaining two ports on the
T-fitting are perpendicular to the exhaust tube and check valve.
5.
For the first SDM-2012, cut a 9-10” piece of 5/16 inch tubing and connect it
from the check valve on the first SDM-2012 to the closest port on the second
SDM-2012’s exhaust T-fitting.
6.
Use one of the provided 10 foot lengths of tubing and connect it to the T-fitting
on the last SDM-2012. The maximum recommended exhaust tube length is 10
feet.
7.
For the remaining SDM-2012s, cut 6-7” pieces of 5/16 inch tubing and connect
the remaining T-fittings.
