Bio-Rad PDS-1000 / He™ and Hepta™ Systems - Manual (Page 17)

1. Secure the cylinder to a wall, post, or other anchored fixture so it will not tip or fall dur-
ing use.
2. Inspect the cylinder valve for dirt, dust, oil, grease, or damaged threads. Remove dust
and dirt with a clean cloth. Do not attach the regulator if you determine that the valve
port is damaged or cannot be cleaned. Inform your gas supplier of this condition and
request a replacement cylinder.
3. Clear the valve port of any foreign matter by standing to the side of the cylinder and
quickly opening and closing the cylinder valve.
4. Attach the regulator to the cylinder valve and tighten securely with a 1 1/8" open-end
wrench or a 10" or 12" adjustable wrench.
Three-Way Metering Valve (Solenoid) Installation
Connecting the helium pressure regulator to the 3-way helium metering (solenoid) valve
Components needed:
• Two 5/16" open end wrenches (Figure 2.4)
• PEEK tubing, 6 feet (Figure 2.2)
• Solenoid valve (Figure 2.3)
Note: The Swagelock fittings used on the flexible tubing are easily damaged by over
tightening. Turn finger-tight, then use wrench for 1/6 additional turn (60°).
1. Connect one end of the 6 foot tubing assembly to helium pressure regulator (Figure 3.1).
Attach the tubing to the in-line, 0.45 micron filter at the end of the regulator. Use two
5/16" open end wrenches to tighten the connection.
2. Connect the other end of the 6 foot tubing assembly to the inlet port of the 3-way helium
(solenoid) valve assembly. This is the port nearest the metal exhaust filter on the 3-way meter-
ing valve. Use two 5/16" open end wrench to tighten the connection (Figures 2.3 and 2.10).
Connecting the 3-way helium metering (solenoid) valve to the PDS-1000/He main unit
Components needed:
• Two 5/16" open end wrenches (Figure 2.4)
• PEEK tubing, 2.5 feet (Figure 2.2)
• Solenoid valve (Figure 2.3)
Note: The Swagelock fittings used on the flexible tubing are easily damaged by over
tightening. Turn finger-tight, then use the wrench for 1/6 additional turn (60°).
1. Connect one end of the 2.5 foot PEEK tubing assembly to the outlet port of the 3-way heli-
um metering (solenoid) valve assembly (Figures 2.3 and 2.10). This is the port nearest the
adjustable metering valve (black knob). Use two 5/16" open end wrenches to tighten the
connection. Do not alter the setting of the metering valve at this time.
2. Connect one end of the 2.5 foot long PEEK tubing assembly to the PDS-1000/He unit.
This port is located on the gas acceleration tube, below the helium pressure gauge (top,
rear of unit). Use a 5/16" open end wrench to tighten the connection (Figure 2.10).
3. Plug the power cord of the 3-way helium metering (solenoid) valve into the rear of the
PDS-1000/He unit (Figure 2.10).
14