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- ADCS-601 is a fully automated reference level Air Data Calibration Standard for the verification and calibration of air data range instruments, in particular Air Data Test Sets (ADTS). ADCS-601’s intended function is the static pressure calibration of Pt and Ps range pressure transducers with very low measurement uncertainty. ADCS-601 is not intended to duplicate the functions of an ADTS in calibrating and testing onboard aircraft instruments.
- ADCS-601 covers the pressure range of 1 to 380 kPa (0.3 to 120 inHg) in absolute and gauge modes with fully automated operation and state of the art uncertainty.
- ADCS-601 is an integrated system made up of several instruments that work together under the control of ADCS Tools software running on a personal computer. Operator interaction with ADCS-601 is accomplished through the keyboard, pointing device and display of the system controller (personal computer).
- The heart of the system is a fully automated PG7601 piston gauge or pressure balance that covers the range of 15 to 380 kPa (4.5 to 120 inHg). The PG7601 range is extended down to 1 kPa (0.3 inHg) by an FPG8601 force balanced piston gauge with automated pressure control.
The ADCS-601 system is made up of two automated pressure standards with overlapping ranges to cover the full pressure range. An automated PG7601 piston gauge covers the range of 15 to 380 kPa (4.5 to 120 inHg) (see Section 2.2.1). The PG7601 range is extended down to 1 kPa (0.3 inHg) by an FPG8601 force balanced piston gauge with automated pressure control (see Section 2.2.2). The system also includes vacuum pumps and vacuum measurement instruments to support absolute mode operation. An RPM4 Reference Pressure Monitor is included to assist in performing a comparison of the FPG8601 and PG7601 pressure standards.
Physically, the ADCS-601 system is divided into two major components. The Reference Bench is a laboratory table onto which are installed the PG7601 and FPG8601 pressure standards, pneumatic control switching hardware and the reference vacuum pumping systems. The Control Cabinet contains the PPC3 automated pressure controllers, RPM4 Reference Pressure Monitor and Gas Supply Panel. The system controller (personal computer) is connected to the system by a USB interface hub.
The ADCS-601 system is controlled by ADCS Tools software running on a personal computer. ADCS Tools manages the entire system, communicating with other software programs and system instruments. ADCS Tools also provides the overall system interface through the personal computers display, keyboard and pointing device.
Reference bench
The ADCS-601 Reference Bench is a wooden topped laboratory work bench onto which are installed the PG7601 and FPG8601 pressure standards. Also included on the bench is a pneumatic interconnections box (see Figure 8), the system connections to the device under test (DUT) and the pumping system for the reference vacuum against which absolute pressure is defined. The vacuum pumps may be purchased separately.
Control cabinet
The ADCS-601 Control Cabinet is a 19-inch rack-mount enclosure into which are mounted the PPC3 pressure controllers that provide automated pressure control for the PG7601 and FPG8601 pressure standards and an RPM4 Reference Pressure Monitor used to perform the validation comparison of the PG7601 and FPG8601. Also included in the control cabinet are electrical power connections and a gas supply panel which sets and indicates gas pressure supplies to various parts of the system.
Gas supply panel
The Gas Supply Panel is in the ADCS-601 Control. It is accessed by a door in the lower part of the front of the Control Cabinet. The Gas Supply Panel is used to set and indicate gas pressure supplies to various ADCS-601 systems and components.
Specifications |
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Power requirements | Instruments (AC1) 100 to 240 VAC, 50/60 Hz, 240 W max. consumption Fuse: 250VT 10A Reference vacuum pumps (AC2) Utility pump (AC3) |
Pressure supply requirements | Drive air 0.7 to 1 MPa (100 to 150 psi) Test gas |
Operating temperature range | 20 ºC to 26 ºC |
Weight | Reference bench 173 kg (380 lb) approx. (with turbo pump and controller installed) Control cabinet Utility and roughing vacuum pumps |
Dimensions | Reference bench 145 cm H x 122 cm W x 76 cm D (57 in. x 48 in. x 30 in.) Control cabinet |
Pressure ranges | Overall 1 to 380 kPa (0.3 to 120 inHg) PG7601 FPG8601 |
Operating medium | Nitrogen or air |
Pressure connections | TEST(+) port Quick connector (1/4 in. NUPRO® SS-QC4-B1-400) TEST(-) port |
CD conformance | Available, must be specified |
PG7601 Piston Gauge Specifications
Ambient and piston-cylinder condition measurements |
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Temperature | Range Ambient: 0 °C to 40 °C Piston-cylinder module: 0 °C to 40 °C Resolution Ambient: 0.1 Piston-cylinder module: 0.01 Measurement uncertainty Ambient: ± 1 Piston-cylinder module: ± 0.1 |
Barometric pressure | Range 70 kPa to 110 kPa Resolution 10 Pa Measurement uncertainty ± 140 Pa |
Relative humidity | Range 5 to 95% RH Resolution 1% RH Measurement uncertainty ± 10% RH |
Piston position | Range ± 4.5 mm Resolution 0.1 Mm Measurement uncertainty ± 0.2 mm |
Piston rotation (rate and deceleration) | Range 2 to 99 rpm Resolution 1 rpm |
Reference vacuum | With on-board gauge Range 0 to 20 Pa Resolution 0.01 Pa Measurement uncertainty ± 0.1 Pa or 10% of reading, whichever is greater With external capacitance diaphragm gauge |
Piston-cylinder module: PC-7100/7600-10 |
|
Nominal pressure to mass | 10 kPa/kg |
Operation | Gas operated, gas lubricated |
Piston material | Tungsten carbide |
Cylinder material | Tungsten carbide |
Nominal diameter | 35 mm |
Nominal area | 1,000 mm2 |
Mounting system | Positive free deformation |
Typical drop rate | 0.1 mm/min |
Piston assembly nominal mass | 0.5 kg |
Mass set: masses > 50g |
|
Material | 304L non-magnetic stainless steel |
Finish | Electropolished |
Uncertainty in measured values | ± 5 ppm or 1 mg, whichever is greater |
FPG8601 General Specifications
Ambient and piston-cylinder condition measurements |
|
Temperature | Lubrication gas Range: 0 °C to 40 °C Resolution: 0.1 °C Accuracy: ± 0.2 °C Piston-cylinder |
Relative humidity | Range: 5 to 95% RH Resolution: 1% RH Accuracy: ± 10 %RH |
Vacuum | Range: 13.3 Pa (100 mTorr) Resolution: 0.001 Pa (0.01 mTorr) Accuracy: ± 0.06 Pa (0.45 mTorr) |
Ambient and lubrication pressure sensor | Range: 200 kPa Resolution: 1 Pa Accuracy: ± 0.1 kPa |
Pressure measurement and control specifications
10 to 380 KPA, PG7601 and PPC3-700K |
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Sensitivity¹ | 0.01 Pa + 0.5 ppm |
Precision² | ± (0.01 Pa + 2 ppm) |
Measurement uncertainty³ | see the piston-cylinder calibration report and current revision of Technical Note 7920TN01. |
Control set point increments | 1 kPa |
Stability of set pressure | ± 1 Pa |
Typical control set point time | 60 to 180 seconds |
¹ Sensitivity: The smallest variation in input detectable in output.
² Precision: Combined linearity, hysteresis, repeatability.
³ Measurement uncertainty: Maximum deviation of the indicated pressure from the true value of applied pressure including all sources of uncertainty combined and expanded (k=2) following the ISO "Guide to the Expression of Uncertainty in Measurement."
1 to 15 KPA, FPG8601 and PPC3-100K |
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Resolution¹ | 0.01 Pa |
Precision² | ± (2 ppm + 50 mPa) |
Measurement uncertainty³ | ± 0.008% of reading or 0.3 Pa (0.0001 inHg) , whichever is larger |
Control set point increments | 1 Pa |
Stability of set pressure | ± 1 Pa (0.0003 inHg) |
Typical control set point time | 60 to 180 seconds |
¹ Resolution: Minimum display increment.
² Precision: Combined linearity, hysteresis, repeatability.
³ Measurement uncertainty: Maximum deviation of the indicated pressure from the true value of applied pressure including all sources of uncertainty combined and expanded (k=2) following the ISO “Guide to the Expression of Uncertainty in Measurement." Note: The uncertainty assigned to the FPG8601 used in an ADCS-601 system is expanded relative to the standard FPG8601 instrument. to allow validation by the PG7601 and an indefinite recalibration interval. See Section 7.2.3 and Technical Note 2090TN05.
Model Name | Description |
---|---|
ADCS-601 |
Air Data Calibration Standard |
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