Fuji Electric pressure transmitters

We took for example the the FCX-A2 V5 series transmitter, which accurately measures the differential pressure, level of liquid, gauge pressure or flow rate, and transmits a proportional current signal of 4 to 20mA DC.All the adjustment functions are incorporated in the transmission unit for making adjustments easily and exactly.Transmitter settings (such as range and damping time constant, etc.) can be changed from an HHC (Hand Held Communicator). The transmitter utilizes a unique micromachined capacitive silicon sensor with state-of-the-art microprocessor technology to provide exceptional performance and functionnality.The transmitter is compact and light, provide high accuracy and reliability. Local adjustment of zero and span are possible from outside screw on the electronic housing.

Specifications

• Accuracy :
  • ± 0.065% of the calibrated span (standard)
  • ± 0.04% of the calibrated span (option)
• Long term stability : ± 0.1% max.span /10 years
• Differential pressure transmitters for static pressure : up to 1035 bar (15 000 PSI)
• Various materials available for wetted parts : Tantalum, Monel, Hastelloy C, ou PVDF
• Applications : chemicals, petrochemicals, energy, steel-making, paper, food & beverage or water treatment

Cells sensitive element : Silicon chip Micro capacitance based technology

Digital indicator

The FCX-All V5 transmitter may be equipped with an analog or digital indicator. The digital indicator is based on LCD technology and shows the information on 2 lines each of 6 digits and also includes 3 push buttons. The indicator enables the measurement in physical units and the local configuration of the transmitter.

Main settings

• Zero/Span calibration without reference pressure service
• Linear or square root signal
• Damping
• Digital indicator configuration
• Zero/Span calibration
• Self-diagnosis
• Output circuit calibration
• Direction and value of burnout

Burnout current

In conformance with the recommendations of NAMUR NE 43, the output of the transmitter can be driven to a specific value should the transmitter experience an internal failure. The standard output signal limits are 3.2 to 22.5 mA.
In case of a transmitter failure, the burnout direction can be down scaled (3.2 to 4 mA) or up scaled (20 to 22.5 mA), being programmable.

Maintenance functions

The calibration parameters are saved in the transmitter. At any time, it is possible to come back to the factory calibration of the transmitter.
Min and max temperatures are stored in the transmitter memory.
It is always possible to visualize the values in a specific menu on the screen of the hand held communicator. All the adjustment functions of the transmitter can be locked by a password (the external adjusting screw is also locked).

Transmitter measurement diaphragm materials

coating for prevention of hydrogen diffusion in the measurement cell (hydrogen sulphide) : Gold and Ceramic

For certain configurations, the process fluids generate hydrogen atoms that may be diffused through the metal diaphragm. The contamination of the oil associated with this diffusion degrades the transmitter’s measurement accuracy and life time. Thanks to our gold and ceramic double-coating diaphragm, the hydrogen’s permeation is stopped.
In this configuration, the transmitters may be used in Sulphur reduction installations, hydrogen production units, oil refineries and putrefaction mud treatment works.

Different materials and coatings are available for the pressure transmitter diaphragms to guarantee the longevity and reliability of your measurements.