Condec UPC5210 - Manual (Page 10)

Operation 7
2.2. Using the REGULATOR (1), adjust the maximum intensifier pump input pressure, as read by the
REGULATED PRESSURE gauge (6), to 1/10 of the full-scale range of the device-under-test. The
unit utilizes an internal intensifier with a 10:1 ratio. As an example, setting regulated pressure to 300
PSI would generate an output pressure of 3,000 PSI. Using this technique, the device under test is
fully protected from being accidentally over-pressurized.
2.3. To generate pressure, enable the PUMP CONTROL switch (20) and monitor the pressure as it builds
in the ACCUMULATOR gauge (9). Turn the PUMP CONTROL switch (20) off when 10% more
than the target pressure has been achieved.
2.4. To apply pressure, close the VENT valve (8) approximately two turns to its stop and open the
COARSE ADJUSTMENT valve (2) approximately 1/2 turn counter-clockwise until the numerical
display begins to move. In general, the pressure may be changed rapidly until reaching
approximately 90% of it desired final value.
2.5. Use either the COARSE ADJUSTMENT (2) or VENT valve (8) to obtain a specific pressure
reading. Both provide precise control. As the pressure approaches the desired value, the valve being
used for control should be rotated slowly clockwise to its closed position. With a little experience,
pressure values very close to the desired final value may be quickly achieved.
NOTE: Use the intensifier PUMP CONTROL switch if the ACCUMULATOR gauge (9) reading falls below
required target pressure value.
2.6. To obtain exact pressure readings, slowly rotate the VERNIER control (13) knob in the direction
required (clockwise to increase pressure) as indicated by the electronic numerical display.
3. If pressure measurements below atmospheric pressure are required, connect a vacuum pump to the
VENT/VACUUM port (15) as shown in Figure 2-3 on page 8.
3.1. Open the VENT valve (8), but the COARSE ADJUSTMENT valve (2) must remain closed. Apply
power to the vacuum pump and allow it to evacuate the system for several minutes or until the
digital display reading reaches equilibrium near 0 PSIA. Press the
ZERO button to establish a zero
reference on the display.
3.2. With the vacuum pump still running, close the VENT valve (8) and check for system leaks. If there
are none, continue to step 3.3.
3.3. Remove the vacuum pump.
3.4. To apply vacuum, COARSE ADJUSTMENT (2) valve must remain closed. Open the VENT valve
(8) counter-clockwise slowly until the numerical display begins to move.
3.5. As the pressure approaches the desired value, the VENT valve (8) should be rotated slowly
clockwise to its closed position. With a little experience, pressure values very close to the desired
final value may be quickly achieved.
3.6. To obtain exact PSIA readings, slowly rotate the VERNIER control (13) knob in the direction
required (clockwise to increase pressure) as indicated by the electronic numerical display.
4. Transducer Current Measurement - the current signal from the transducer may be displayed at any time
simply by placing the DISPLAY SELECT switch (16) to its CURRENT position.