RPM4-AD Reference Pressure Monitor

RPM4-AD is a specific configuration of the RPM4 reference pressure monitor that measures and displays altitude, airspeed and in conventional pressure units


• Covers the absolute and differential pressure ranges of typical air data instruments.
• Fixed wing and rotary wing range versions
• True Pt, Ps, Qc operation
• Transfer standard level measurement uncertainty
• Automated rate measurement with user specified sample time
• Automated leak check function
• Compact and rugged presentation
• SDS self defense system shuts off test ports to protect from overpressure
• RS232 and IEEE-488 interfaces included
• Battery pack available
• Ideal for validation of air data test sets (ADTS)


RPM4-AD Air data version

RPM4-AD is a specific configuration of the RPM4 reference pressure monitor that measures and displays altitude (ft, m), airspeed units (kts, mph, km/h, Mach) and in conventional pressure units.



RPM4-AD General Specifications

Power Requirements 85 to 264 VAC, 50/60 Hz, 25 VA max consumption
and 12VDC, 1.2 A
Operating Temperature Range 15 to 35 °C
Ventilation To prevent product overheating, provide proper ventilation. Allow 10 cm (4 in.) clearance from rear panel cooling fan.
Storage Temperature Range - 20 to 70 °C
Vibration Meets MIL-T-28800D
Weight 5 kg (11 lb)
Dimensions 10 cm H x 22.7 cm W x 24 cm D (3.9 in. x 9.3 in. x 9.5 in.)
Microprocessors Motorola 68302, 16 MHz
Communication Ports RS232 (COM1, COM2), IEEE-488.2
Fuses 1 A, 250 VAC fuse, 5 x 20 mm, time lag type fuse
Internal power supply fuse not replaceable by operator:
2.5A, 250 VAC
Pressure Ranges Lo Q-RPT Hi Q-RPT Qc (sea level)
A160K/A160K 160 kPa abs (23 psi) 160 kPa abs (23 psi) 60 kPa (8.7 psi)
A160K/A350K 160 kPa abs (23 psi) 350 kPa abs (51 psi) 250 kPa (36 psi)
Altitude Range
A160K/A160K - 4 000 to 20 000 m (- 13 000 to 66 000 ft)
A160K/A350K - 4 000 to 30 000 m (- 13 000 to 100 000 ft)
Airspeed Range
(sea level)
A160K/A160K 0 to 1020 km/hr (550 kts)
A160K/A350K 0 to 2040 km/hr (1100 kts)
Operating Medium Clean, dry, non-corrosive gas
Pressure Connections
Ps , Pt AN-4 (37º flare) male
Self Defense System (SDS™) Included.  Isolates Q-RPTs from Ps and Pt test ports and vents Q-RPTs to atmosphere.
Pressure Limits A160K Q-RPT A350K Q-RPT
Maximum working pressure 160 kPa abs (23 psi) 350 kPa abs (51 psi)
Maximum pressure without damage 200 kPa abs (29 ipsi) 370 kPa abs (54 psi)
Maximum SDS protection 10 MPa (1500 psi)
CE Mark Available, must be specified



Model Name


RPM4-AD A350Ka/A160Ka Reference Pressure Monitor, Air Data Version (fixed wing)
RPM4-AD A160Ka/A160Ka Reference Pressure Monitor, Air Data Version (rotary wing)

Accessories common to all models:



Rack Mount Kit Rack mount kit for standard 19 in. rack
Reference vacuum kit, 220V VA-PPC/MPC-REF, 220V Vacuum pump package for PPC EXHAUST port (220V)
Footswitch Remote [ENTER] footswitch
3990-801 Manual Gas Pressure Controller


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