Static Pressure Signal Range and Accuracy
(For monitoring via communication or on indicator for BRAIN and HART communication type. Includes terminal-based linearity, hysteresis, and repeatability) Range Upper Range Value and Lower Range Value of the static pressure can be set in the range between 0 and Maximum Working Pressure (MWP*). The upper range value must be greater than the lower range value. Minimum setting span is 0.5 MPa (73 psi). * : Maximum Working Pressure (MWP) is within flange rating pressure. Accuracy Absolute Pressure 1 MPa or higher: ±0.5% of span Less than 1 MPa: ±0.5%×(1 MPa/span) of span Gauge Pressure Reference Gauge pressure reference is 1013 hPa (1 atm) Note: Gauge pressure variable is based on the above fixed reference and thus subject to be affected by the change of atomospheric pressure. □ FUNCTIONAL SPECIFICATIONS Output “◊” For 4 to 20 mA HART / BRAIN (Output signal code D and J) Two wire 4 to 20 mA DC output with digital communications. BRAIN or HART FSK protocol are superimposed on the 4 to 20 mA signal. Output range: 3.6 mA to 21.6 mA Output limits conform to NAMUR NE43 can be preset by option code C2 or C3. For 1 to 5 V HART (Output signal code Q) Three or four wire low power 1 to 5 V DC output with HART, linear or square root programmable. HART protocol are superimposed on the 1 to 5 V DC signal. Output range: 0.9 V to 5.4 V DC Failure Alarm For 4 to 20 mA HART / BRAIN (Output signal code D and J) Output status at CPU failure and hardware error; Up-scale: 110%, 21.6 mA DC or more (standard) Down-scale: −5%, 3.2 mA DC or less For 1 to 5 V HART (Output signal code Q) Analog output status at CPU failure and hardware error; Up-scale: 110%, 5.4 V DC or more (standard) Down-scale: −5%, 0.8 V DC or less Damping Time Constant (1st order) Amplifier damping time constant is adjustable from 0.00 to 100.00 s by software and added to response time. Note: For BRAIN protocol type, when amplifier software damping is set to less than 0.5 s, communication may occasionally be unavailble during the operation, especially while output changes dynamically. The default setting of damping ensures stable communication. Update Period “◊” Differential pressure: 45 ms