RKI Instruments SDM-E2 - Manual (Page 17)

Hardware Setup • 12
NOTE: If you have an EAGLE 2 with an IR CO
2
sensor in the 0-10,000 ppm or
0-5.00 %vol range, be sure to replace the air filter at the AIR inlet fitting
with the CO
2
scrubber when testing an instrument with a CO
2
sensor
installed to ensure that the CO
2
present in fresh air is scrubbed out.
Remove the black end caps from each end of the scrubber before
installing onto the AIR inlet fitting. Replace the caps when the scrubber
is not in use. See the “Spare Parts List” on page 181 for a scrubber
with a tubing stub.
6. Install the 10 foot long 3/16 inch ID flexible tube that is included with each
SDM-E2 on the exhaust fitting of each SDM-E2. Route the tube to an area
where the exhaust can be safely dispersed, such as an open window. Exhaust
tubing from multiple units can be daisy chained together in a manifold for more
convenient operation. In this case, the check valves that are provided with the
docking stations need to be used. See "Assembling a Manifold for Multiple
SDM-E2 Units" below for instructions.
CAUTION: The maximum recommended length for the exhaust tube is 30 feet. Do
not use more than 30 feet of tubing or tubing with an ID of less than
3/16 inch for the exhaust tube or the bump test and calibration
accuracy will be adversely affected. The exhaust tube that is shipped
with the SDM-E2 has an ID of 3/16 inch and is 10 feet long.
7. Install the 3 foot long 3/16 inch ID tubes that are included with the SDM-E2 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-E2 Units" below for instructions.
8. Connect the provided USB cable from the type B USB port on the back of the
SDM-E2 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 10 for more information about USB hubs.
Assembling a Manifold for Multiple SDM-E2 Units
One 10-docking station manifold can be created for GAS 1. Although the demand
flow regulators can handle up to 10 EAGLE 2 pumps, the PC Controller program is
set up to handle GAS 2s in groups of 5. Depending on your sensor configuration, you
may be able to have one GAS 2 manifold for all 10 docking stations as long as there
are two 5-instrument sets of EAGLE 2s with different sensor configurations. For
example if you have 5 standard 4 gas plus PID instruments and 5 standard 4 gas plus
NH
3
instruments, all 10 docking stations can be connected to the same GAS 2
manifold since the PID sensor in the 5 standard 4 gas plus PID instruments will be
calibrated and then the NH
3
sensor in the 5 standard 4 gas plus NH
3
instruments will
be calibrated. If you have 10 EAGLE 2s with exactly the same GAS 2 configuration,
you will need to create 2 5-docking station manifolds for GAS 2. See Figure 12
through Figure 14 for more explanation. If you have multiple instruments with different