
Pressure
Controller/Calibrator
Theory of Operation
9
Theory of Operation
This section provides a block diagram discussion of the Product pneumatic,
mechanical, electrical, and communication design.
Note
In many of the procedures in this manual, the Product is referred to
as the Unit Under Test (UUT).
Overview
Main Chassis
- includes the main processor with chassis interface, front-panel
processor, GUI interface, module interfaces, solenoid drivers, and distribution of
power, communications, and pneumatic pressure.
PMM
- are available in multiple pressure ranges and performance ratings. All
PMMs use the same pneumatic and electrical connections. Each module carries
and applies full characterization and calibration data to the communicated output
pressure. The test port is protected by a relief valve. The power supply is fully or
partially isolated as required for the sensor type.
PCM
- uses a different mechanical footprint from the PMMs and an identical
electrical connector. PCMs accept pressure supply from the main chassis up to
3300 psi, exhaust pressure to an exhaust port, and regulate pressure on the test
port. The PCM monitors and controls each port for safe operation. The primary
sensor controls feedback to the system-selected PMM.
Accessories
Isolation Valve
- The isolation valve connects pneumatically to the UUT test
port. When activated in the main firmware, the isolation valve treats the UUT as a
module and protects the device during venting and pressure supply release. The
valve allows for internal-only leak testing.
CPS
- Two-stage filter with exhaust and purge valves that capture contamination
from the UUT. Solenoids are driven from the UUT rear-panel solenoid driver
connector when activated in the main firmware.
Test Stand
- Supports extension of the main chassis test port to a convenient
test connection.
Pneumatic and Electrical Configuration
This section provides a discussion of the pneumatic and electrical configuration.
Pneumatics
- The main chassis accepts a maximum of five PMMs with full-scale
up to 20 MPa (3000 psi) and one PCM. The main chassis has independent
pneumatic isolation of both test and reference ports for each of the PMM slots.
For basic operation, a PCM and at least one PMM must be installed. System
configurations depend on the type of PMM modules installed. PMMs vary by
pressure range, absolute or gauge native mode, and if the PMM can be used as
a barometric sensor. Each PMM slot in the main chassis and the test port
handles the full range of available modules (0 psi - 3000 psi). See Figure 1.
Содержание 6270A
Страница 5: ...Contents continued iii Inspect and Replace the CPS valves 122 Replacement Parts 124 Screw Torque 136...
Страница 6: ...6270A Service Manual iv...
Страница 26: ...6270A Service Manual 20 2 1 3 hxn212 eps Figure 7 PMM and PCM Removal...
Страница 30: ...6270A Service Manual 24 1 2 3 hxn205 eps Figure 9 Manifold Installation...
Страница 32: ...6270A Service Manual 26 2 1 1 hxn202 eps Figure 10 Remove Feet and Tilt Stands...
Страница 37: ...Pressure Controller Calibrator Module Guide Rails 31 1 2 3 hxn209 eps Figure 13 Remove Module Guide Rails...
Страница 40: ...6270A Service Manual 34 hxn208 eps Figure 16 Remove the CPU...
Страница 43: ...Pressure Controller Calibrator Module Guide Rails 37 8 9 10 hxn219 eps Figure 18 Dock Assembly...
Страница 47: ...Pressure Controller Calibrator Module Guide Rails 41 2 3 1 4 6 7 5 8 hxn215 eps Figure 21 Remove B Series Valve...
Страница 53: ...Pressure Controller Calibrator Power Supply and Fan 47 3 1 2 4 hxn221 eps Figure 25 Remove Power Supply...
Страница 64: ...6270A Service Manual 58 1 2 3 4 5 7 6 hxn210 eps Figure 32 Remove Latch Assembly...
Страница 67: ...Pressure Controller Calibrator PCM Assembly 61 2 1 hxn401 eps Figure 34 Module Components...
Страница 138: ...6270A Service Manual 132 9 2 5 18 7 9 8 2x 9 5x 3 4x 4 3x 7 2x 11 12 13 6 10 hxn509 eps Figure 56 PMM CAL KIT 20M Parts...