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Summary of Contents for DH Instruments MPC1-1000
- Page 1 MPC1-1000 and MPC1-3000 User’s Manual © 2001 - 2007 DH Instruments, a Fluke Company...
- Page 2 DH Instruments, a Fluke Company 4765 East Beautiful Lane Phoenix AZ 85044-5318 USA. DH Instruments makes sincere efforts to ensure accuracy and quality of its’ published materials; however, no warranty, expressed or implied, is provided.
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Page 3: Table Of Contents
PRESSURE DECREASE LEAK (BELOW ATMOSPHERE) ................19 TEST PRESSURE WILL NOT CHANGE....................19 5.3.1 TEST INLET VALVE ............................20 5.3.2 VARIABLE VOLUME (VV) ..........................20 5.3.3 TEST OUTLET VALVE ............................20 PRESSURE CHANGES SLOWLY OR SLUGGISHLY ................21 Page i © 2001 - 2007 DH Instruments, a Fluke Company... - Page 4 PNEUMATIC SCHEMATIC ........................23 VARIABLE VOLUME INFORMATION.....................24 6.2.1 VARIABLE VOLUME SPECIFICATIONS ......................25 Table 1. Variable Volume Specifications....................25 Figure 1. Front Panel ..........................1 Figure 2. Back Panel ..........................2 Page ii © 2001 - 2007 DH Instruments, a Fluke Company...
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Page 5: Introduction
1 000 or 3 000 psi systems where precise pressure control is required. MPC1-1000 is for pressures to 1 000 psi (7 MPa), MPC1-3000 is for pressures to 3 000 psi (21 MPa). 1.2 LOCATION OF THE COMPONENTS... -
Page 6: Specifications
Vacuum Connection Figure 2. Back Panel 1.3 SPECIFICATIONS Pressure Range: MPC1-1000: Vacuum to 1 000 psi (7 MPa) MPC1-3000: Vacuum to 3 000 psi (21 MPa) Pressure Supply: Equal to or greater than the maximum pressure desired MPC1-1000: 1 200 psi (8 MPa) (maximum supply) -
Page 7: Installation
(2), vacuum source to (4), and any external venting tubing to (3) required to the corresponding connections on the rear panel. See Figure 2. The front feet can be folded out to tilt the unit up if desired. Page 3 © 2001 - 2007 DH Instruments, a Fluke Company... - Page 8 MPC1-1000 and MPC1-3000 User’s Manual Page 4 © 2001 - 2007 DH Instruments, a Fluke Company...
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Page 9: Operation
3.1.1 MPC1 This instrument manually controls pressures from vacuum to 1 000 psi (7 MPa) (MPC1-1000) or vacuum to 3 000 psi (21 MPa) (MPC1-3000) through the use of valves, a variable volume (VV) pump and a pressure gauge. Fittings for an outside source of pressure and vacuum are located on the back panel as are a test connection and vent port. -
Page 10: Variable Volume (Vv)
3.2 SETTING ZERO GAUGE PRESSURE (VENTED) Close test inlet valve (1). Place outlet selection valve (6) to VENT position. Open test outlet valve (4). Open pressure equalization valve (3) (pull valve outward). Page 6 © 2001 - 2007 DH Instruments, a Fluke Company... -
Page 11: Setting Positive Gauge Pressure (Above Atmosphere)
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 continue increasing pressures, repeat Step shown above. Page 7 © 2001 - 2007 DH Instruments, a Fluke Company... -
Page 12: Decreasing Pressure
Close equalization valve (push valve inward). Adjust VV knob until desired pressure is obtained (or until the piston floats when connected to a piston gauge). To continue decreasing pressures, repeat Step shown above. Page 8 © 2001 - 2007 DH Instruments, a Fluke Company... -
Page 13: Setting Negative Gauge Pressure (Below Atmosphere)
Close equalization valve (push valve inward). Adjust VV knob until desired pressure is obtained (or until the piston floats when connected to a piston gauge). To continue decreasing pressures, repeat Step shown above. Page 9 © 2001 - 2007 DH Instruments, a Fluke Company... -
Page 14: Increasing Pressure
Open test outlet valve until the approximate desired pressure is reached. Close equalization valve (push valve inward). Adjust VV knob until desired pressure is obtained (or until the piston floats when connected to a piston gauge). Page 10 © 2001 - 2007 DH Instruments, a Fluke Company... -
Page 15: Decreasing Pressure
Close equalization valve (push valve inward). Adjust VV knob until desired pressure is obtained (or until the piston floats when connected to a piston gauge). To continue decreasing pressures, repeat Step Page 11 © 2001 - 2007 DH Instruments, a Fluke Company... - Page 16 MPC1-1000 and MPC1-3000 User’s Manual Page 12 © 2001 - 2007 DH Instruments, a Fluke Company...
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Page 17: Maintenance And Adjustments
MPC1-1000 and MPC1-3000 User’s Manual 4. M AINTENANCE DJUSTMENTS No special maintenance or adjustments are required for the MPC1. Page 13 © 2001 - 2007 DH Instruments, a Fluke Company... - Page 18 MPC1-1000 and MPC1-3000 User’s Manual Page 14 © 2001 - 2007 DH Instruments, a Fluke Company...
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Page 19: Troubleshooting
Therefore, continue executing the troubleshooting procedures until all leaks are located and corrected. Since a troubleshooting guide that will cover every conceivable possibility is impractical, the source of your leak may not be shown here. Page 15 © 2001 - 2007 DH Instruments, a Fluke Company... -
Page 20: Pressure Increase Leak (Above Atmosphere)
If pressure continues to increase, open equalization valve. Wait for pressure to stabilize. If pressure stops increasing, have VV serviced. Page 16 © 2001 - 2007 DH Instruments, a Fluke Company... -
Page 21: Pressure Decrease Leak (Above Atmosphere)
The above steps have resulted in the checking of all items within the MPC1 that could cause a leak. If you have not located the leak, repeat the steps or contact DHI Technical Service for additional assistance. Page 17 © 2001 - 2007 DH Instruments, a Fluke Company... -
Page 22: Pressure Increase Leak (Below Atmosphere)
Check all the fittings within the suspected circuit by disconnecting and inspecting them. Replace any damaged fittings. Reassemble and leak check. If the leak is still present, return the MPC1 to DHI Technical Service for repair. Page 18 © 2001 - 2007 DH Instruments, a Fluke Company... -
Page 23: Pressure Decrease Leak (Below Atmosphere)
The MPC1 uses very small inside diameter control tubes. The purpose of the filters is to protect these tubes from contamination. Do NOT operate the MPC1 without an active filter element of less than a 0.5 micron rating. Page 19 © 2001 - 2007 DH Instruments, a Fluke Company... -
Page 24: Test Inlet Valve
To check if the filter is plugged, select the VACUUM position with the outlet selection valve. If the system begins to operate correctly the filter is most likely plugged; clean or replace as needed. Page 20 © 2001 - 2007 DH Instruments, a Fluke Company... -
Page 25: Pressure Changes Slowly Or Sluggishly
Pressure changes can be slow if a large external volume is connected to a MPC1. 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 21 © 2001 - 2007 DH Instruments, a Fluke Company... - Page 26 MPC1-1000 and MPC1-3000 User’s Manual Page 22 © 2001 - 2007 DH Instruments, a Fluke Company...
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Page 27: Annexes
MPC1-1000 and MPC1-3000 User’s Manual 6. A NNEXES 6.1 PNEUMATIC SCHEMATIC Page 23 © 2001 - 2007 DH Instruments, a Fluke Company... -
Page 28: Variable Volume Information
MPC1-1000 and MPC1-3000 User’s Manual 6.2 VARIABLE VOLUME INFORMATION Page 24 © 2001 - 2007 DH Instruments, a Fluke Company... -
Page 29: Variable Volume Specifications
Burst 6 000 psi min (42 MPa) 12 000 psi min (84 MPa) Total Volume 3.5 cu in. (57.5 cc) 2.5 cu in. (41 cc) Revolutions for Total Volume Page 25 © 2001 - 2007 DH Instruments, a Fluke Company... - Page 30 MPC1-1000 and MPC1-3000 User’s Manual Page 26 © 2001 - 2007 DH Instruments, a Fluke Company...
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