7750i Air Data Test Set
Key features
- Ideal for ATE systems
- Accuracy to ±3 feet 0.04 knots
- True differential sensor for airspeed
- Control stability to 0.00032 inHg
Product overview: 7750i Air Data Test Set
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The Fluke 7750i Air Data Test Set represents the latest evolution in air data calibration technology. This advanced laboratory instrument is engineered for exceptional precision and long-term stability, thanks to its unique quartz sensor and innovative pressure control technology. The Fluke 7750i delivers industry-leading measurement and control of all critical air data parameters, making it the ideal solution for demanding avionics calibration environments.
Unmatched Precision for Avionics Calibration
The Fluke 7750i Air Data Test Set is specifically designed for calibrating a broad range of avionics instrumentation, including:
- Altimeters
- Airspeed indicators
- Rate of climb meters
- Mach meters
- Air data computers
- Engine-based control systems that rely on accurate pressure measurement
With its exceptional precision, the Fluke 7750i enables you to calibrate devices to meet strict Reduced Vertical Separation Minimum (RVSM) requirements, maintaining altitude control to within three feet—better than 0.0011 in Hg at sea level. The instrument also provides highly accurate rate control for both altitude and airspeed.
Seamless Integration into Modern Test Systems
- Compact Design for Test Racks: The seven-inch height (4U) makes the Fluke 7750i easy to integrate into Automatic Test Equipment (ATE) systems and laboratory racks.
- Flexible Interfaces: Equipped with an IEEE-488 interface, the 7750i allows for convenient PC-based control and data acquisition.
- Backward Compatibility: The 7750i can emulate previous-generation ADTS devices (such as the Model 6610), eliminating the need to update your existing test software.
Advanced Safety and Convenience Features
- Automatic Go to Ground: At the press of a button, the 7750i brings the system to local barometric pressure, protecting sensitive devices under test (DUT) from sudden pressure transients during disconnection.
- Leak Test Mode: A dedicated mode enables quick and reliable leak checks before beginning any calibration process.
- Device Protection: Set high and low limits for critical parameters—including altitude, airspeed, rate of climb, Mach, negative Qc, and ARINC 565 envelope—to safeguard the DUT throughout testing.
- Automatic Volume Characterization: The Fluke 7750i automatically tunes its pressure controller to accommodate external volumes from 80 to 1,000 cubic centimeters (5 to 60 cubic inches), supporting a wide variety of aircraft and component configurations. Multiple devices can be tested simultaneously on a single manifold, increasing productivity for component manufacturers.
Efficiency Through Automation
- Automatic Zeroing: Routine zeroing for optimal performance is now fully automated. Zeroing can be initiated at the push of a button or via the PC interface. With the built-in vacuum sensor, there’s no need for additional external gauges or sensors—just one vacuum pump is required. Zeroing completes in as little as 30 to 45 minutes.
User-Friendly Displays and Units
- Multiple Avionics and Pressure Units: The Fluke 7750i clearly displays all common avionics units, including feet and meters for altitude, airspeed in knots and km/h, Mach number, and rates per minute. Pressure units can also be displayed for flexible testing.
Performance for Both Fixed-Wing and Rotary Aircraft
The standard Fluke 7750i Air Data Test Set configuration offers a Ps range of 32 in Hg and a Qc range of 68 in Hg, suitable for a broad range of aircraft. For specialized rotary aircraft applications, a custom Qc range of 32 in Hg is available to enhance performance at lower airspeeds. Additional custom ranges can be provided—please consult the factory for details.
Specifications: 7750i Air Data Test Set
| Specifications | |
| Automatic Go to Ground | Upon selecting the go to ground command, the 7750i safely controls the pressure to the current, local barometric pressure. The user can then disconnect the device under test (DUT) without exposing sensitive instruments to a potential pressure transient or shock. |
| Leak Test Mode | A separate mode is provided for performing leak checks prior to beginning an actual calibration. |
| Protecting the Device Under Test | In order to protect the DUT, the operator can program high and low limit settings for:
|
| Automatic Volume Characterization | The 7750i automatically tunes the controller into external volumes ranging from 5 to 60 cubic inches (80 to 1000 cc). This allows a large degree of flexibility for the configuration of the test system and the type of aircraft and components to be tested. For component manufacturers, a large number of devices can be tested simultaneously on a single manifold. |
| Automatic Zeroing | As with any instrument, regular zeroing is suggested to achieve maximum performance. This task is now automated and can be performed at the push of a button, or over the PC interfaces. The 7750i incorporates the vacuum sensor onboard; no separate or external vacuum gauges or sensors are required. In addition, only one vacuum pump is required to operate and zero the 7750i ADTS. Zeroing is performed in 30 to 45 minutes using the specificed vacuum pump. |
| Avionics and Pressure Units | The Model 7750i displays the common avionics units including feet and meters for altitude, calibrated airspeed in knots, km/hr, and Mach with corresponding rate displays for each unit per minute. It can also display pressure units. |
| Modes | |
| Precision | ±(0.005% of reading) from 40% to 100% FS. ±(0.005% of 40%) from 0% to 40% FS Precision is defined as the combined effect of linearity, repeatability and hysteresis throughout the operating temperature range. Some manufacturers use the word “Accuracy” in place of “Precision,” however the meaning is identical. |
| Stability | Absolute Over 3 months: 0.0019% RDG/3 months Over 1 year: 0.0075% RDG/year Differential Over 3 months: 0.0019% RDG/3 months Over 1 year: 0.0075% RDG/year |
| Zeroing vacuum sensor | Absolute ±10 mtorr at 100 mtorr, ±10% RDG at 100 mtorr Differential N/A |
| Control stability | Absolute ±10 mTorr (1.33 Pa) @ 100 mTorr Differential 0.001% FS |
| Control low limit | Absolute 0.3 in Hg abs. (10 mbar a) Differential 0 in Hg in - Qc mode/0.3 inHg abs. in Pt mode Requires vacuum pump to control 0 psig, or the vent mode can be used to obtain 0 psig. |
| Zero Drift | Absolute <0.004% FS / 24 hr Differential <0.004% FS / 24 hr |
| Rate of climb | Absolute 0 to 1,829 m/min (0 to 6,000 ft/min) Differential N/A |
| Rate of climb tolerance | Absolute 1% of commanded rate for altitudes up to 15,240 m (50,000 ft) 5% of commanded rate for altitudes from 15,240 M( 50,000ft) to 21,336m (70,000 ft) Differential N/A |
| Standard load volume | Absolute 5 to 60 in (80 to 1,000 cc’s) Differential 5 to 60 in (80 to 1,000 cc’s) |
| Mach | Absolute N/A Differential 0 to 10.000 Limits can be set to prevent excessive mach. |
| Total Uncertainty (Aeronautical | 32 in Hg a Sea level ±9 m (3ft) 9144 m (30,000 ft) ±0.9 m (3 ft) 18,288 m (60,000 ft) ± 3.4 m (11 ft) 40 in Hg a Sea level ±0.9 m (3 ft) 9144 m (30,000 ft) ±1.2 m (4 ft) 18,288 m (60,000 ft) ±3.7 m (12 ft) Differential 32 in Hg D 50 ±0.18 knots 100 ±0.09 knots 250 ±0.04 knots 68 in Hg D 50 ±0.39 knots 250 ±0.07 knots 500 ±0.03 knots 1000 ±0.04 knots |
| Total Uncertainty (Engineering Units) | Absolute 32 in Hg a 32 ±0.0030 inHg 30 ±0.0028 inHg 15 ±0.0016 inHg 5 ±0.0011 inHg 40 in Hg a 40 ±0.0038 inHg 30 ±0.0029 inHg 15 ±0.0017 inHg 5 ±0.0013 inHg Differential 32 in Hg D 0.5 ±0.0009 inHg 16 ±0.0016 inHg 32 ±0.0030 inHg 68 in Hg D 0.5 ±0.0019 inHg 16 ±0.0023 inHg 32 ±0.0032 inHg 68 ±0.0063 inHg |
| High Performance for Fixed-Wing or Rotary Aircraft | |
| Although the standard configuration offered is a Ps range of 32 in Hg and a Qc range of 68 in Hg, we also offer custom ranges. For example, for exclusive testing of rotary aircraft, a Qc range of 32 in Hg can be provided, increasing performance in the lower airspeed ranges. For other custom ranges please consult factory. | |
| 7750i-802 | Ranges Ps: 32 Qc: 68 |
| 77508-803 | Ranges Ps: 40 Qc: 68 |
| 7750i-804 | Ranges Ps: 32 Qc: 32 |
| 7750i-805 | Ranges Ps: 40 Qc: 32 |
| Display | |
| Display | TFT Active Matrix Color, 6.4 inch |
| Display Resolution | 1 ft, 0.1 m, 0.1 kn/hr, 0.00001 Mach |
| Units | Altitude: ft, meters Airspeed: knots, km/hr, Mach Pressure: Engineering Units: inHg at 0°C and 60°F, kPa, bar, psi, inH2O at 4 °C, and 25 °C, kg/cm2, mmHg at 0°C, cmHg at 0°C, and cmH2O at 4°C & four user defined linear units of measure. Aeronautical Units: feet, meters, knots, km/h, Mach |
| Control | |
| Rate Control Indication RoC_Rate of climb in all above units RtAS_Rate of airspeed in Knots or km/hr | |
| Total Uncertainty Expression | 2 Sigma |
| Ps/32 inHg FS | RSS of 0.0091% of Reading and 0.0008 inHg |
| Ps/40 inHg FS | RSS of 0.0091% of Reading and 0.0009 inHg |
| Qc/32 inHg FS | RSS of 0.0091% of Reading and 0.0007 inHg |
| Qc/68 inHg FS | RSS of 0.0091% of Reading and 0.0012 inHg |
| Options | |
| Options |
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| General | |
| Electrical Power | 90 to 260 VAC, 50 to 400 Hz, 150W max |
| Temperature | Warmup time: 24 hours Operating temperature: 18°C to 36°C (64 to 97 F) Storage temperature: -20°C to 70°C (-4°F to 158°F) |
| Humidity | Operating humidity: 20% to 75% RH, non-condensing Storage humidity: 5% to 95%, non-condensing |
| Pressure Medium | High purity nitrogen or dry, clean air |
| Calibration | One year interval is recommended. Use of primary standard such as the Model 2468 Pitot Static Gas Piston Gauge is recommended. |
| Digital Interface | IEEE-488.2 RS232 Model 6610 emulation mode SCPI syntax |
| Pneumatic Connections | 1/4 in FNPT on all ports. Adapters provided for AN6 and AN4 |
| Weight and Dimensions (h x w x d) | Weight: 45 lb (20 kg) Size: 7 in x 16.5 in x 19 in (17.8 cm x 41.9 cm x 48.3 cm) |
| Supply Pressure | 60 psi +/- 5 psi (4 bar +/- 0.5 bar) |
| Supply Vacuum | Minimum 50 liters per minute with auto-vent valve. Ultimate vacuum less than 1 mtorr |
Models: 7750i Air Data Test Set
7750i
Laboratory Air Data Test Set