Martel Electronics 311A-30D Pressure Calibrator, 30 PSI Differential, 0.025% F.S.

The Martel Electronics 311A-30D is a high-performance pressure calibrator designed for demanding industrial environments. With its 30 PSI differential range and 0.025% F.S. accuracy, this calibrator delivers precise measurements for a wide range of applications. It features a rugged, compact design, a large backlit LCD, and the ability to measure pressure, RTD temperature, and 4-20 mA signals simultaneously. The built-in 24 V loop power supply simplifies transmitter testing, and the external pressure module connection expands its capabilities to 27 additional ranges.

Key Features & Highlights

• 30 PSI differential pressure range with 0.025% F.S. accuracy
• One isolated stainless steel pressure sensor with temperature compensation
• External pressure module connection supports all BetaPort-P modules (27 ranges)
• Pt100 RTD input for temperature measurement (0.1°C / 0.2°F accuracy)
• Measure 4-20 mA signals and up to 30 V DC
• Internal 24 V loop power supply for powering transmitters under test
• Large graphic LCD with backlight, configurable to display up to 3 inputs simultaneously
• Pressure displayed in 17 engineering units plus custom units
• Switch test on Pressure 1, Pressure 2, or external pressure module
• Operating mode layers for simple to complex applications
• Store up to five frequently used setups; last setup auto-recalled on power-up
• % error and damping functions
• Small, rugged design; operates on four AA batteries
• Includes soft case, AA batteries, manual, NIST-traceable certificate, and test leads

Applications

The Martel Electronics 311A-30D is ideal for field calibration of pressure transmitters, gauges, and switches. It is particularly suited for gas flow calibration (custody transfer) applications, as well as general industrial maintenance, process control, and quality assurance tasks. Its portability and battery operation make it a reliable tool for on-site calibration in refineries, chemical plants, power generation facilities, and manufacturing environments.