The Martel Electronics 321A-5CV-30C is a precision pressure calibrator designed for demanding industrial applications, particularly gas custody transfer and flow calibration. With dual isolated stainless steel pressure sensors providing 0.025% F.S. accuracy, this instrument delivers reliable measurements in the field. The improved ‘A’ version includes a rugged Power-Tool-Tough case, custom engineering units, user-adjustable resolution, and enhanced stability.
Key Features & Highlights
- Dual isolated pressure sensors: 5 PSI and 30 PSI compound ranges
- Accuracy: 0.025% F.S. with temperature compensation
- External pressure module connection supports all BetaPort-P modules (27 ranges)
- Pt100 RTD input for temperature measurement (0.1°C accuracy)
- Measure 4-20 mA signals with internal 24 V loop power supply
- Measure up to 30 V DC
- 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 module
- Operating mode layers for simple to complex applications
- Store up to five setups; last setup auto-recalled on power-up
- % error and damping functions
- Compact, rugged design; operates on four AA batteries
Applications
Ideal for gas flow calibration (custody transfer), pressure transmitter calibration, and general industrial pressure testing. The combination of pressure, temperature, and current measurement makes it a versatile tool for field technicians and calibration labs.
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