Flow computer for liquids and gases0 pages

C ou nt um G ro up
C o u n t um G ro up

Metering Solutions

Metering Solutions

Flow computer
for liquids and gases

CDN 16
CDN16 is a multi run panel-mounted flow computer designed for high accuracy
custody transfer and fiscal metering applications. The CDN16 is designed for
reliability in high-end gas- and liquid applications, and includes all relevant API,
AGA, ISO, IP and many other standards.
It can be applied to a wide range of products including crude oil, refined products,
bio-fuels and liquefied gas, natural and industrial gases.

Flow
computers

Measuring
sytems

Remote
Terminal Unit

Supervisory
system

A versatile concept

A next generation technology

Modular design

A state of-the art flow computer

The CDN16 is based on powerful single stream modules which
are combined in a number of different casings, for different
application types. A CDN16 stream module comprises an
impressive number of inputs, outputs, communication interfaces
and other hardware for real-time digital and analog signal
processing for one metering stream, with cycle times up to
250ms.

Prover support with uni-directional, bi-directional, compact
prover, master meter, with dual chronometry and pulse
interpolation with a resolution of 50ns.

Flexibility with various Enclosures
CDN16 stream modules are used in a specific enclosure, ranging
from a single stream DIN-rail mountable device with screw
terminals for field connections, to a convenient multi-stream
panel mounted flow computer with a 7 inch large color touchscreen for more demanding applications. The 19 inch rack
enclosure for up to 8 stream modules allows compact cabinet
design, ideal for off-shore platforms or other space limited
systems.
Supported products
The CDN16 supports but is not limited to crude oils, natural gas,
NGLs, LPGs, refined products, special gases, and steam.
Either liquid or gas may be combined in multi-stream
applications.
Connectivity
Free-configurable digital communication interfacing is
implemented for ultrasonic flow meters, gas chromatographs,
HART transmitters and other metering equipment utilizing various
communication protocols for flexible usage – no “firmware”
programming is required.

PID & valve control, prove control, batch control, and sampler
control.
Built-in redundancy for dual power supply, dual Ethernet and
software.
On-board storage (1 GB) for audit-trail, event- and primary data
logging in each module.
High precision calculations utilizing a math coprocessor using
64-bit double precision floating point data.
High accuracy of 0.008% FS or better even at high ambient
temperatures of electronics.
No totalizer rollovers through high resolution 64-bit counters.
True Level A pulse integrity verification utilizing the on-board
programmable hardware (FPGA).
No DIP-switches, no jumpers.
Design, Production & Assembly
Modern, fully automated production & assembly lines and
automated calibration procedures are used to ensure top quality
of the electronic boards.