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
The Model 7750i Air Data Test Set represents the latest generation Air Data Test Set (ADTS), incorporating a unique quartz sensor having unequalled precision and long term stability with the latest pressure control technology. The Model 7750i ADTS provides high performance measurement and control of all air data parameters.
The Model 7750i is a laboratory ADTS for calibrating a wide variety of avionics instrumentation such as altimeters, airspeed indicators, rate of climb meters, Mach meters, air data computers and engine-based control systems that rely on accurate control and measurement of pressure. The 7750i can be used to calibrate devices that are required to meet the Reduced Vertical Separation Minimal (RVSM) requirements, controlling altitude to within three feet (better than 0.0011 in Hg) at sea level. Additionally, the 7750i provides precision rate control for both altitude and airspeed.
The Model 7750i is ideal for use in Automatic Test Equipment (ATE) systems. The seven-inch height (4U) allows easy integration into comprehensive test systems. Additionally, an IEEE-488 interface is provided for PC-based control. The 7750i can be set to emulate previous generation ADTS (Model 6610), eliminating the need to alter existing software.
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:
- Altitude
- Airspeed
- Rate of climb
- Mach
- Negative Qc
- ARINC 565 envelope
Automatic volume characterization
The 7750i automatically tunes the controller into external volumes ranging from 80 to 1000 cubic centimeters (5 to 60 cubic inches). 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 specified 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.
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.
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 |
|
| 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 |