7750i Air Data Test Set
The Model 7750i ADTS provides high performance measurement and control of all air data parameters.
- High accuracy, RVSM compliant
- Ideal for ATE systems
- Accuracy to ± 2 feet, 0.03 knots
- True differential sensor for airspeed
- Control stability to 0.00032 inHg
- One year calibration interval
- Variety of ranges available for rotary and fixed wing aircraft
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 two feet (better than 0.003 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 |
|
| 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 | From 25% to 100% of FS: 0.005% of reading below 25% FS: 0.005% of 25% 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/yearDifferential Over 3 months: 0.0019% RDG/3 months Over 1 year: 0.0075% RDG/year |
| Zeroing vacuum sensor | Absolute 0.001% FSDifferential N/A |
| Control stability | Absolute ±10 mTorr (1.33 Pa) @ 100 mTorrDifferential 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 modeRequires vacuum pump to control 0 psig, or the vent mode can be used to obtain 0 psig. |
| Zero Drift | Absolute <0.004% FS / 24 hrDifferential <0.004% FS / 24 hr |
| Rate of climb | Absolute 0 to 50,000 ft/minDifferential N/A |
| Rate of climb tolerance | Absolute 1% of commanded to 50,000 ftDifferential 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/ADifferential 0 to 10.000Limits can be set to prevent excessive mach. |
| Total Uncertainty (Aeronautical Units) | Absolute 32 in Hg a Sea level ±2ft 30,000 ±2 ft 60,000 ±7 ft40 in Hg a Sea level ±2 ft 30,000 ±3 ft 60,000 ±8 ftDifferential32 in Hg D 50 ±0.1 knots 100 ±0.05 knots 250 ±0.02 knots 68 in Hg D |
| Total Uncertainty (Engineering Units) | Absolute
32 in Hg a 40 in Hg a Differential 32 in Hg D 68 in Hg D |
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 |
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| 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 |
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| Options |
|
General |
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| Electrical Power | 90 to 260 VAC, 50 to 400 Hz, 150W max |
| Temperature | Warmup time: 3 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 |
Model Name |
Description |
|---|---|
| 7750i | Laboratory Air Data Test Set |
Product manual
Data sheets
