User manual FLUKE MPC1-D-30000

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[. . . ] MPC1-D-1000/MPC1-D-3000 Manual Pressure Controller for Differential Pressure User's Manual ©2000 DH Instruments, Inc. MPC1-D User's Manual Manual Conventions (Caution) is used in throughout the manual to identify user warnings and cautions. (NOTE) is used throughout the manual to identify operating and applications advice and additional explanations. High pressure liquids and gases are potentially hazardous. Energy stored in these liquids and gases can be released unexpectedly and with extreme force. High pressure systems should be assembled and operated only by personnel who have been instructed in proper safety practices. © 2000 DH Instruments, Inc. [. . . ] Open the VENT valve. 3. 3 SETTING A LINE PRESSURE This procedure applies when using MPC1-D on both channels to set differential pressures at elevated static pressures. All procedures instruct the operator to open the equalization valve prior to opening the SUPPLY valves. It is possible to adjust the pressure in the test circuit using the SUPPLY or VENT valve without opening the variable volume equalization valve. However, this should be done ONLY WHEN THE OPERATION OF THE SYSTEM AND THE NECESSARY PRECAUTIONS ARE UNDERSTOOD BY THE OPERATOR. Refer to Sections 3. 1, 6. 1 and 6. 2 for more information. Page 9 ©2000 DH Instruments, Inc. MPC1-D User's Manual 3. 3. 1 INCREASING LINE PRESSURE Open the HI/LO BYPASS valve. Open both variable volume equalization valves (pull knob outward). OPENING AN EQUALIZATION VALVE MAY RESULT IN A SUDDEN CHANGE IN THE TEST PRESSURE. Ensure conditions are such that this either does not happen or that its effects are inconsequential. Carefully operate the SUPPLY valve to admit pressure until the approximate desired line pressure is reached. Place lo VV piston at appropriate position (see Section 3. 1. 3) and close its equalization valve (push knob inward). Adjust VV knob until desired line pressure is obtained (or until the piston floats when connected to a piston gauge). Maximum differential pressure across the VV piston is 150 psi (1 MPa). Differential pressures above 150 psi (1 MPa) on the TEST side will automatically open the equalization valve. To set a differential pressure after setting a line pressure, see Section 3. 4. To set another, higher, line pressure, repeat Step pressure, see Section 3. 3. 2. To set a lower line 3. 3. 2 DECREASING LINE PRESSURE Open the HI/LO BYPASS valve. Open both variable volume equalization valves (pull knob outward). OPENING AN EQUALIZATION VALVE MAY RESULT IN A SUDDEN CHANGE IN THE TEST PRESSURE. Ensure conditions are such that this either does not happen or that its effects are inconsequential. Carefully operate the VENT valve to exhaust pressure until the approximate desired pressure is reached. Place lo VV piston at appropriate position (see Section 3. 1. 3) and close its equalization valve (push knob inward). ©2000 DH Instruments, Inc. Page 10 MPC1-D User's Manual Adjust VV knob until desired line pressure is obtained (or until the piston floats when connected to a piston gauge). Maximum differential pressure across the VV piston is 150 psi (1 MPa). Pressures above 150 psi (1 MPa) will automatically open the equalization valve. To set a differential pressures after setting a line pressure, see Section 3. 4. To set another, lower, line pressure, repeat Step pressure, see Section 3. 3. 1. To set a higher line 3. 4 SETTING DIFFERENTIAL PRESSURES AT LINE PRESSURES For instructions on setting line pressure, see Section 3. 3. Once the line pressure has been set, follow the instructions below to set differential pressures. Close HI/LO BYPASS valve. CLOSING THE HI/LO BYPASS VALVE ISOLATES ONE SIDE OF THE DEVICE UNDER TEST (DUT) FROM THE OTHER. When the BYPASS valve is closed, Take care to avoid accidentally setting larger differential pressure than desired. Exercise special care if it is necessary to operate the SUPPLY or VENT valve as these can cause large pressure changes to occur quickly. Place hi VV piston at appropriate position (see Section 3. 1. 3) and close its equalization valve (push knob inward). Adjust hi VV knob until desired differential pressure is obtained (or until the piston floats when connected to a piston gauge). [. . . ] Pressure changes can be slow if a large external volume is connected to a MPC1-D. This condition is compounded by a low supply pressure. If the pressure changes are too slow due to a large external volume, reduce the volume. Page 19 ©2000 DH Instruments, Inc. MPC1-D User's Manual NOTES ©2000 DH Instruments, Inc Page 20 MPC1-D User's Manual 6. 8. Variable volume (lo side) Variable volume equalization valve (lo side) Check valve Filter Lo ref connection (1/8 in. [. . . ]

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