The Fluke 7250LP Low Pressure Controller/Calibrator is a precision instrument designed to calibrate and control low-pressure sensors, transducers, mechanical gauges, and portable calibrators across bidirectional positive and negative gauge modes. Built around a quartz sensor element, the 7250LP delivers 0.005% of reading accuracy from 25% to 100% of range, with resolution to 0.01 Pa (0.0001 inH₂O) and user-selectable resolution down to 1:1,000,000. The instrument reaches setpoint in 30 seconds or less into a 15 cubic inch volume with zero overshoot.
Technical Specifications
Pressure Ranges (three dual-range configurations available):
• 2.5/7.5 kPa (10/30 inH₂O)
• 5/15 kPa (20/60 inH₂O)
• 10/25 kPa (35/100 inH₂O)
Precision:
• 0.005% of reading from 25% to 100% of higher range
• Fixed error of 0.005% FS from 0% to 25%
• For 10/30 inH₂O range: 0.009% of reading from 7.5 to 30 inH₂O; below 7.5 inH₂O, root-sum-square of 0.0075% of reading and 0.000375 inH₂O
• Negative gauge precision matches corresponding positive pressure
Control Stability:
• 0.004% of each range in active mode
• Passive mode adds no additional uncertainty in leak-free, temperature-stable systems
Resolution: 0.01 Pa (0.0001 inH₂O) with user-selectable resolution to 1:1,000,000
Response Time: 30 seconds or less to setpoint with no overshoot
– Key Features
• Supports over 12 pressure units: inH₂O (4°C, 20°C, 25°C), inHg (0°C, 68°F), kPa, bar, psi, kg/cm², mm Hg, cm Hg, cm H₂O (4°C), plus two user-defined units
• Active mode continuously maintains setpoint and compensates for leaks and temperature-induced pressure changes
• Passive mode allows user-defined control band to eliminate control noise in stable systems
• Stores up to 20 user-defined programs with up to 1000 steps
• Step up/down, jog dial control, sweep test functionality, and automated exercising routines
– Typical Applications
Low-pressure transducer calibration, sensor verification, gauge testing, and portable calibrator qualification across laboratory and field environments requiring sub-kilopascal precision.
