Ametek JOFRA HPC600, Руководство пользователя

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4. Close the vent knob.
5. Press the pump key and watch the
pressure (or vacuum) increase until you
reach the desired pressure.
Note : The motor speed will start slowly
when pressure is low (<15psi) to
allow better control at low
pressures.
6. Use the fine adjustment vernier to fine tune
the pressure/vacuum reading as needed.
7. To reduce or bleed off the pressure entirely
slowly rotate the vent knob to the open
position. Doing this step carefully will allow
you to control the pressure bleed rate to a high degree and will facilitate
taking down-scale pressure readings.
3.1 Electric Pump Considerations
The JOFRA HPC600 a small, lightweight, battery powered pneumatic pump
that allows the user up to 10 bar (150 psi) quickly and with good control.
Because the pump has an upper pressure generation limit of 11 bar
(160psi) there may be atmospheric conditions where it cannot achieve the
full scale pressure of 10 bar. High altitude use (about 3000 ft or 1000
meters) or use at cold temperatures may limit the pump to about 9 bar (135
psi). In these cases the vernier adjustment can be used to generate the
additional pressure needed if full scale pressure must be generated.
In these situations the user should begin the calibration with the vernier in
the full counter clockwise position and then when the electric pump reaches
its limit turn the vernier in the clockwise direction to raise the pressure and
to set the desired reading.
Figure 4