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| 7750i Air Data Test Set AeroCal |
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The Model 7750i AeroCal Air Data Test Set provides automated control of pressures to test and calibrate a wide variety of pitot static avionics components including air data computers, altimeters, airspeed, rate of climb, cabin pressure, and others test sets.
The Model 7750i incorporates quartz sensor technology to provide a precision of 0.005% of reading making the 7750i an ideal choice for RVSM calibrations.
- 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
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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:
- Altitude
- Airspeed
- Rate of climb
- Mach
- Negative Qc
- ARINC 565 envelope
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| 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/year
Differential
Over 3 months: 0.0019% RDG/3 months
Over 1 year: 0.0075% RDG/year |
| Zeroing vacuum sensor |
Absolute
0.001% FS
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 50,000 ft/min
Differential
N/A |
| Rate of climb tolerance |
Absolute
1% of commanded to 50,000 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 Units) |
Absolute
32 in Hg a
Sea level ±2ft
30,000 ±2 ft
60,000 ±7 ft
40 in Hg a
Sea level ±2 ft
30,000 ±3 ft
60,000 ±8 ft
Differential
32 in Hg D
50 ±0.1 knots
100 ±0.05 knots
250 ±0.02 knots
68 in Hg D
50 ±0.2 knots
250 ±0.04 knots
500 ±0.02 knots
1,000 ±0.02 knots |
| Total Uncertainty (Engineering Units) |
Absolute
32 in Hg a
32 ±0.0030
30 ±0.0025 in Hg
15 ±0.0013 in Hg
5 ±0.0008 in Hg
40 in Hg a
40 ±0.0037 inHg
30 ±0.0026 in Hg
15 ±0.0014 in Hg
5 ±0.0009 in Hg
Differential
32 in Hg D
0.5 ±0.0005 in Hg
16 ±0.0013 in Hg
32 ±0.0026 in Hg
68 in Hg D
0.5 ±0.001 in Hg
16 ±0.0016 in Hg
32 ±0.0027 in Hg
68 ±0.0055 in Hg |
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 |
- Lines and fittings kit (supply and test lines) part number 7750-104
- Vacuum pump_85 liter/minute capacity with auto-vent valve
- Filter and muffler
- National Instruments LabVIEW™ driver
- ISO 17025 accredited calibration certificate
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General |
| 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 |
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