PTA522, PTA523 and PTA524 Automatic Silent Compressors
Chapter 3: Operation
Rev A August 2021
Page 7
3.4.
Operation
3.4.1. Locating the Compressor
The compressor has an extremely low noise emittance at 50 dB(a), but is not entirely vibration-free. Consequently it is
recommended to locate the unit as far as possible away from the Optical Table (or other vibration-sensitive hardware it is
connected to) and not on any structure (shelving etc.) attached to the Table.
Warning
Only use the compressor on a flat surface
3.4.2. Starting
1. Ensure the module is in the Off state (see Figure 8).
2. Insert the power plug into the mains outlet.
3. Start the compressor by turning the switch to “Auto”.
4. The compressor’s working process is automatic and it switches on and off as necessary to maintain the tank
pressure.
Figure 8 Start Switch
3.4.3. Adjusting the Outlet Pressure
Pressure within the compressor air tank is controlled automatically and cannot be adjusted: it varies from between the
maximum value allowed (8 bar/120 psi standard) and starts refilling again when the pressure drops to the minimum value
(6 bar/90 psi standard).
The outlet air pressure is fully adjustable between zero and the tank pressure by turning the knob on the regulator valve
(see Figure 9): Fully anticlockwise = regulator valve closed (no output from the compressor unit). Fully clockwise = regulator
valve fully open, max. output pressure available from the compressor unit.
Figure 9 Adjusting the Outlet Pressure
