Multifunction calibrator ADT 761A

for mA signalspressurefor pressure gauges

Description
The ADT 761A portable automated pressure calibrators integrate a high-performance internal electric pump and a precision pressure controller to provide a turnkey solution for calibrating gauges, transmitters and pressure switches both in the field and in the laboratory. The ADT 761A improves on the ADT 761 by offering greater internal sensor flexibility, increased pressure generation capability and modern HMI and connectivity (Ethernet, Wi‑Fi, Bluetooth, USB) with a color touchscreen.

Key points

• Fully automatic calibrator with integrated electric pump (up to 100 bar depending on model)
• Accuracy 0.02 % FS (0.01 % optional)
• Dual pressure module (low and high) and support for external pressure modules
• Portable (≈8 kg)
• Wi‑Fi, Ethernet, Bluetooth and USB
• Datalogging with 6 GB memory (up to 1,000,000 readings)
• ISO 17025 calibration certificate with data included as standard

Main functions
Automatic pressure generation by internal pump from 90% vacuum up to 100 bar (depending on model). Measurement and generation of electrical signals (mA/V), 24 V loop power supply, HART communication and Profibus support. User interface via 7-inch (800 x 480) color touchscreen and numeric keypad. Automated test sequences (calibration procedures, PNP/NPN pressure switch tests, leak test, pressure hold). Support for external digital pressure modules to extend the range to very high pressures (ADT 160A / ADT 161A modules depending on configuration).

Available models

• ADT 761A-LLP: low pressure ±75 mbar (30 inH2O)
• ADT 761A-D: differential and relative (-0.95 to 2.5 bar)
• ADT 761A-500: vacuum to 35 bar rel. (500 psig)
• ADT 761A-1K: vacuum to 70 bar rel. (1 000 psig)
• ADT 761A-1.5K: vacuum to 100 bar rel. (1 500 psig)
• ADT 761A-BP: barometric calibration (100 to 1 200 hPa)

Pressure specifications (excerpt)
Specification - 761A-LLP - 761A-D - 761A-500 - 761A-1K - 761A-1.5K - 761A-BP
Max range - 30 inH2O (75 mbar) - 35 psi (2.5 bar) - 500 psig (35 bar.g) - 1 000 psig (70 bar.g) - 1 500 psig (100 bar.g) - Sensor 1 200 hPa
Min range - -30 inH2O (-75 mbar) - -13.5 psi (-0.95 bar) - -13 psi (-0.9 bar) - -13 psi (-0.9 bar) - -13 psi (-0.9 bar) - Sensor 100 hPa
Accuracy(1) - 0.05 % FS - 0.02 % FS - 0.02 % FS - 0.02 % FS - 0.02 % FS - 0.01 % FS
Stability - 0.005 % FS or 0.05 Pa - 0.005 % FS - 0.005 % FS - 0.005 % FS - 0.005 % FS - 0.02 hPa
Pressure type - Differential/Relative - Differential/Relative - Relative/Absolute - Relative/Absolute - Relative/Absolute - Absolute
Resolution - 6 digits (all variants)
Units available - Pa, hPa, kPa, mPa, bar, mbar, psi, mmHg, inHg, inH2O, kg/m2, torr, custom units

Measurements and electrical signals (excerpt)
mA measurement: ±25/±50 mA, resolution 0.0001 mA, accuracy 0.008 %L+0.004 %FS
V measurement: ±300 mV / ±5/±12/±30 V, resolution 0.1 μV / 0.0001 V, accuracy 0.008 %L+0.002 %FS
mA source: 0–25 mA (0.1 μA resolution), V source: 0–16 V
Loop supply: 16–30 V, max load 70 mA

Remarks
ADT 761A accepts intelligent digital pressure modules (ADT 161A / ADT 160A) to extend measurement to very high pressures (up to several thousand bars depending on module). Unit is delivered with ISO 17025 certificate including NIST-traceable data.

Technical characteristics / specifications

• Typical accuracy: 0.02 % FS (0.01 % optional)
• Stability control: < 0.005 % FS (0.003 % on high-precision model)
• Display: 7-inch color TFT touchscreen (800 x 480)
• Communications: USB, LAN (Ethernet), Bluetooth, Wi‑Fi, HART, Profibus
• Internal memory: 6 GB (up to 1,000,000 values), task capacity: up to 1,000 tasks
• Rechargeable Li‑ion battery: approx. 8 hours (main content) / spec sheet indicates ~16 h depending on configuration, recharge <5 h
• Protection: IP31
• Weight: approx. 7.95–8 kg
• Dimensions: 299 x 193 x 192 mm
• Operating temperature: 0 °C to 50 °C (temperature compensated per specification)
• Storage temperature: -20 °C to 60 °C
• Humidity: <90 % non-condensing
• Vibration & shock: vibration 4 g (20–2 000 Hz), shock 8 g, drop test 1 m
• Pump life: >100,000 cycles
• Interface languages: English, German, French, Italian, Spanish, Portuguese, Chinese, Japanese, Russian
• Warranty: 1 year
• Delivered standard: manifold ADT106‑X (model-dependent), mains adapter 110/220, rechargeable battery 9723, test cables 9022, hose ADT100‑761 HOSE, case 9907, etc.