Technical Information Capacitive, ceramic pressure sensor Application Your benefits Pressure sensor for use in the pressure measurement of liquid Dry capacitive ceramic sensor with ultrapure (99.9 %) Al2O3 and gaseous media. ceramic ■ High overload resistance ■ Very good long-term stability ■ High corrosion resistance ■ Digital/analog signal output (SPI, UART, U) ■ Measuring ranges from 0 to 0.1 bar (0 to 1.5 psi) to 0 to 40 bar (0 to 580 psi) ■ Optional temperature output, switch output People for Process Automation

Table of contents About this document . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Document function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Symbols used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 RoHS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Other standards and guidelines . . . . . . . . . . . . . . . . . . . . . . . . . 13 Calibration; unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Function and system design . . ....

About this document Document function This document contains all the technical data for the device and provides an overview of the device versions and accessories that can be ordered. Symbols used Safety symbols

Function and system design Measuring principle A capacitive ceramic sensor element is at the core of the USC70. The basic material is (Al2O3), an ultrapure (99.9%) aluminum oxide ceramic that is highly resistant to many aggressive gases and liquids. Two cylindrical ceramic components (process isolating diaphragm and ceramic substrate) are hermetically sealed together. In the case of absolute pressure sensors, the reference vacuum of 3.0 x 10-6 mbar that is generated in the production process between the process isolating diaphragm and the ceramic substrate becomes permanent, thereby enabling...

Measured process variable ■ Gauge pressure or absolute pressure Measuring range 1) If the maximum sensor measuring range is exceeded or undershot by up to 10 %, digital measured values are still provided. In this range, however, the performance characteristics of the measured values can deviate by a factor of up to 3. The maximum pressure for the measuring device depends on the lowest-rated element with regard to pressure. ► The measuring device must be operated only within the specified limits!

Output Output signal Signal range and signal on alarm of voltage output 1 Calibrated measuring range 2 Extended measuring range The signal range and the signal on alarm are based on NAMUR NE 43. The error value of the signal on alarm can be configured and is displayed in the illustration for the example > 95 % VDD (CARMEN standard sensor setting). Behavior in case of an error See the S&C CARMEN Manual

Dead time, time constant Presentation of the dead time and the time constant: Dynamic behavior

Performance characteristics Reference operating conditions ■ Ambient temperature TA = constant, in range: +23 to +27 °C (+73 to +81 °F) ■ Relative humidity 9 = constant, in range: 5 to 80 % RH. ■ Ambient pressure pA = constant, in range: 860 to 1 060 mbar (12.47 to 15.37 psi) ■ Position of measuring cell = constant, in range: process isolating diaphragm pointing downwards (see also the 'Influence of installation position" section ^ B 11) ■ Analog output supply voltage: 4.9 to 5.1 V DC ■ Digital output supply voltage: 2.9 to 5.5 VDC ■ Reference installation of Endress+Hauser (Components and Mounting...

• Sensor measuring range: 0.1 to 0.4 bar • Process and ambient temperature: -20 to 80 °C

Installation Influence of the installation Any installation position is possible but it may cause a zero point shift. Climate class Electromagnetic No specifications (open system) Overvoltage protection 6 V DC (maximum voltage for CARMEN ASIC) Safety notes For work on and with the device: Danger of damaging the device Static sensitive devices. ► Handle only at static safe work stations!

1) The US Food & Drug Administration (FDA) has no objections to the use of ceramics made of aluminum oxide as a surface material in contact with foodstuffs. This declaration is based on the FDA certificates of our ceramic suppliers. TSE free (Transmissible Spongiform Encephalopathy) The following applies to all device components in contact with the process: ■ They do not contain any materials derived from animals. ■ No additives or operating materials derived from animals are used in production or processing.

Certificates and approvals RoHS The measuring system complies with the substance restrictions of the Restriction on Hazardous Substances Directive 2011/65/EU. Other standards and The applicable European guidelines and standards can be found in the relevant EU Declarations of guidelines Conformity. The following were also applied: Reference conditions and procedures for testing industrial and process measurement transmitters Part 1: General procedures for all types of transmitters Part 2: Specific procedures for pressure transmitters Electrical pressure measuring instruments, pressure sensors,...

Detailed ordering information is available from the following sources: In the Product Configurator on the Endress+Hauser website: www.sensors-components.endress.com Product Configurator - the tool for individual product configuration ■ Product-specific configuration data ■ Depending on the device: direct input of information specific to measuring point, such as measuring range ■Automatic verification of exclusion criteria According to the directive 2012/19/EU on waste electrical and electronic equipment (WEEE), our products are marked with the depicted symbol in order to minimize the disposal...

Explanations and supplementary documentationTerms and abbreviations LRL

2 Upper range limit • Upper range limit (URL) = 10 bar (150 psi) • Lower range limit (LRL) = -1 bar (-15 psi) Calibrated/adjusted span: Lower range value (LRV) = 0 bar (0 psi) Upper range value (URV) = 5 bar (75 psi) For TD < 1, the performance characteristics of TD = 1 apply. CARMEN sensor settings The sensor setting is configurable, see S&C CARMEN Customer Manual.