The Yokogawa CA700 is a highly accurate and functional pressure calibrator specifically designed for the calibration of differential pressure and pressure transmitters, which are widely used in plant processes. It utilizes a silicon resonant sensor based on DPharp technology, achieving pressure measurement accuracy of ±0.01% of reading, making it one of the most accurate portable pressure calibrators available .

The CA700 is available in three pressure ranges: -80 to 200 kPa, -80 to 1000 kPa, and -80 to 3500 kPa, with resolution down to 0.001 kPa on the 200 kPa range . It also features current and voltage measurement/source capabilities with 0.015% of reading accuracy, and includes a 24V DC loop supply with a built-in 250Ω resistor for HART and BRAIN communication .

Key features include embedded calibration procedures for pressure transmitters and pressure switches, which guide users through standardized test sequences. The instrument can record pre-calibration and post-calibration data, calculate error percentages, and store calibration procedures in its large memory .

The CA700 is housed in an IP54 dustproof and waterproof case, making it suitable for harsh field environments. Applications include field calibration of differential pressure/pressure transmitters, pressure switch testing, electro-pneumatic converter I/O adjustment, two-wire transmitter loop checking, and input command verification for recorders and controllers .