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Overview 2
ComboPump Operation Manual
OPERATING INSTRUCTIONS
The ComboPump is only for use with pneumatic systems. Do not use the ComboPump with liquids of any kind.
For safe and reliable operation please read through the following instructions.
!
WARNING: To prevent damage to the pump and possible injury, never connect the ComboPump to a pressure source greater than 3500 kPa (500 PSIG,
35 bar). Turn o, or isolate, all pressure-generating equipment from the pressure tap prior to connecting the ComboPump.
Note: The operating pressure rating is printed on the pump body label, on the opposite side of the vent knob.
1 Connections: Your pump has two connections: two 1/8" NPT female pipe thread pressure ports (Figure 1). Always use PTFE (polytetrauoroethylene) tape
on the threads of any pressure ttings installed into the ComboPump.
!
CAUTION: Do not use liquid pipe sealing compounds (such as "pipe dope"). Be careful not to over-tighten ttings.
!
WARNING: Your ttings must have a pneumatic pressure rating of at least 5000 kPa (750 PSIG, 50 bar).
2 Setup: Connect the ComboPump to your test set-up. Move the Shuttle Valve up or down to select whether you want "Pressure Mode"
(up position) or "Vacuum Mode" (down position). Make certain the Shuttle Valve is fully up or fully down (Figure 2).
3 Vent: To close the Vent Knob turn it completely clockwise. Don't overtighten—ngertight is enough (Figure 3).
4 Calibrate: You are now ready to perform your pressure or vacuum calibration. Squeeze the ComboPump handle until the gauge displays a value close to
the desired calibration pressure or vacuum.
5 Adjustments: To make pressure (or vacuum) adjustments, turn the Variable Volume Adjustment Knob. Set the precise pressure (or vacuum) desired.
It is located on the bottom of the pump next to the squeeze handle (Figure 4).
6 Finish: After the test is complete open the Vent Knob to completely release pressure or vacuum. The Vent Knob can also be used to slowly bleed the system
by opening it only a slight amount and closing it once the pressure or vacuum is reached.
Note: Be sure to close the Vent Knob fully once the system is fully vented, to prevent the knob from vibrating loose when transporting the pump.
Pressure Ports
Shuttle
Valve
Vent Knob
Variable
Volume
Adjustment
Knob
Figure 1. Connections Figure 2. Setup Figure 3. Vent Figure 4. Adjustments
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