Pressure Calibrator CA700. The CA700 Pressure Calibrator has a basic accuracy of 0.01% of reading on pressure measurement and 0.015% of reading on Current/Voltage source/measurement, which makes it the most accurate calibrator in the portable calibrator class. It also has the highest resolution and widest range of any portable instrument, with a resolution of 0.001 kpa (200.00 kpa range) and a resolution of 0.0001 psi (at the 29 psi range). A high pressure module, the PM100, is now available, that effectively increases the pressure range of the CA700 to 2300 PSI, all the while maintaining the same basic accuracy of 0.01%.