The Fluke 718 300G Pressure Calibrator sources pressure and measures milliamp signals for calibration of pressure instruments, transmitters, gauges, and switches. An integrated, field-serviceable pump eliminates costly disassembly while protective check valves prevent fluid ingress. The instrument simultaneously displays pressure and current readings, captures min/max values, applies dampening, and calculates error percentage for immediate pass/fail assessment. Operators can zero the display, source loop voltage, and test pressure switches—all from a 1 kg handheld platform powered by two 9V alkaline batteries.
## Technical Specifications
**Pressure Measurement**
• Internal sensor range: −12 psi to 300 psi (−850 mbar to 20 bar, −85 to 2068.42 kPa)
• Resolution: 0.01 psi, 1 mbar, 0.1 kPa
• Accuracy: 0.025% of full scale
• Over-pressure rating: 375 psi (25 bar)
**Electrical Measurement**
• mA measurement accuracy: 0.015%
• mA measurement resolution: 0.001 mA
**Pressure Sourcing**
• Built-in pump supports four ranges: −1 to +1 psi, −12 to 30 psi, −12 to 100 psi, −12 to 300 psi
• Non-corrosive gas operation only
**Units & Display**
• Pressure units: psi, inH₂O (4 °C and 20 °C), cmH₂O (4 °C and 20 °C), bar, mbar, kPa, inHg, mmHg, kg/cm²
• Simultaneous pressure and current display
**Environmental & Physical**
• Operating temperature: −10 °C to 55 °C
• Storage temperature: −40 °C to 60 °C
• Relative humidity: 95% (10–30 °C); 75% (30–40 °C)
• Operating altitude: 3,000 m max
• Dimensions (with holster): 216 × 94 × 66 mm
• Weight: 1 kg
• Shock: 1 m drop test
• Vibration: 2 g random, 5–500 Hz
## Key Features
• Zero, min/max capture, hold, and dampening functions
• Error percentage calculation for rapid decision-making
• Switch test capability
• mA percentage and error calculation
• Loop voltage sourcing
• Field-serviceable pump design without disassembly
## Typical Applications
• Pressure transmitter calibration and verification
• Gauge and switch maintenance in process control systems
• Field instrument diagnostics on 4–20 mA loops
## Compatibility & Integration
External pressure modules are available to expand measurement capability beyond the internal sensor range.
