Category: ABB

improper

Improper use

The following are considered to be instances of especially

improper use of the device:

• For use as a climbing aid, for example for mounting purposes.

• For use as a bracket for external loads, for example as a support for piping, etc.

• Material application, for example by painting over the

housing, name plate or welding/soldering on parts.

• Material removal, for example by spot drilling the housing.

Warranty provisions

Using the device in a manner that does not fall within the scope

of its intended use, disregarding this manual, using

underqualified personnel, or making unauthorized alterations

releases the manufacturer from liability for any resulting

damage. This renders the manufacturer’s warranty null and void.

Introduction

As an integrated part of the Advance Optima series the LS25

can be combined with further analyzer modules and completely operated remotely in Ethernet networks.

The LS25 has ATEX, IECEx and CSA certificates for use in potentially explosive atmospheres.

The power supply unit converts 100-240 volts AC to 24 volts DC (24 volts DC can be supplied directly to

the transmitter unit if available).

The power supply box is connected to the transmitter box by a cable. 4-20 mA input signal from external

gas temperature/pressure sensor

can be connected to the screw terminals in the power supply box or directly to the cable connector on

the transmitter unit.

The receiver electronics are connected to the transmitter electronics via a cable.

The absorbed signals detected from the photodetector are amplified and transmitted via this cable to the

transmitter unit.

The same cable transmits the required power supply from the transmitter unit to the receiver unit.

The transmitter Al box contains the main electronic components.

The central processor board performs all instrument control and gas concentration calculations.

The main board contains all the electronics required for the operation of the instrument,

such as the diode laser current and temperature control as well as the analogue to digital signal

conversion.

The display (LCD) continuously shows the gas concentration, laser beam transmission and instrument

status.

an RS-232 port is available for direct serial communication with a PC.

An optional Ethernet board provides TCP/IP communication over a local area network (LAN) as an

alternative to serial communication.

All cable connectors are Phoenix VARIOSUB type and are waterproof.

Instrument Description

The analyser consists of 3 separate units:

 Transmitter unit with decontamination

 Receiver unit with decontamination

 Power supply unit

The transmitter unit consists of the laser module, the temperature stabilised diode laser,

the collimating optics and the main electronics in a coated aluminium case.

The receiver unit contains a focusing lens, photodetector and receiver electronics in a coated aluminium

case.

Both the transmitter and receiver have an environmental protection rating of IP66.

The standard optical window is pressure resistant up to 5 bar (absolute pressure).

The monitor is mounted by assembling the transmitter and receiver with the supplied

purge and calibration unit and mounting to a DN50 process flange (see Figure 3-1).

Optical alignment is both simple and reliable, and the purge device prevents dust

and other contaminants from being deposited on the optical window.

The detector signal is spectrally decomposed into harmonic frequency components of the laser

modulation frequency.

The second harmonic of the signal is used to measure the concentration of the absorbed gas.

Both line amplitude and line width are Both line amplitude and line width are extracted from the second

harmonic line shape.

Therefore the measured concentration is not sensitive to changes in the line shape (line amplitude and

line width).

The measured concentration is not sensitive to line shape changes (line width and line width) caused by

background gases.

Note: The analyser measures only the concentration of free molecules in a given gas and is therefore not 

sensitive to molecules bound to other molecules in complexes and molecules attached to or dissolved in

particles and droplets.

Care should be taken when comparing results with those obtained by other measurement techniques.

Switching points for the position

You can use these parameters to define two position limits for

signaling (see option “Module for digital position feedback”).

Digital output

The alarms generated in the positioner can be polled via the

digital output as a collective alarm.

The desired information can be selected via the operator panel

or remotely via the configuration program.

The output can be set to “active high” or “active low”, as

required.

Digital input

For the digital input, one of the following safety options can be

selected. You may use the operator’s panel or configuration

program to select an option.

— No function (default)

— Move to 0 % position

— Move to 100 % position

— Hold previous position

— Disable local configuration

— Disable local configuration and operation

— Disable any access (no local or remote access via a PC)

The selected function is activated when the 24 V signal is no

longer connected to the digital input (< 11 V DC).

Shut-off function

This parameter can be set separately for each end position.

When the respective configured limit value is exceeded, the

shut-off function causes immediate travel of the actuator until

reaching the set end position.

If the value “0” is entered for the corresponding parameter, the

position is further controlled, even in the respective end

position.

Travel time prolongation

This function can be used to increase the max. travel time for

full travel. This time parameter can be set separately for each

direction.

This function can only be used with the pneumatics with the

safety function “fail-safe”.

Switching points for the position

You can use these parameters to define two position limits for

signaling (see option “Module for digital position feedback”).

Digital output

The alarms generated in the positioner can be polled via the

digital output as a collective alarm.

The desired information can be selected via the operator panel

or remotely via the configuration program.

The output can be set to “active high” or “active low”, as

required.

Use

The positioner has a built-in operating panel providing a 2-line

LCD display and 4 operating buttons for commissioning,

configuration and monitoring during live operation.

Alternatively, the appropriate configuration program can be

used via the available communication interface.

Communication

The positioner has a local communication interface (LCI) as

standard. Additionally, a “HART communication” option for

communication via the 20 mA signal is available. Both

communications are based on the HART Protocol.

Alternatively, HART5 or HART7 are available.

Inputs / Outputs

In addition to its input for the analog position setpoint, the

positioner is equipped with a digital input which can be used

to activate control system functions in the device. A digital

output allows you to output collective alarms or fault messages.

Modular design

The basic model can be enhanced at any time by retrofitting

optional equipment.

Option modules can be installed for analog and digital position feedback.

Additionally, a mechanical position indicator, proximity

switches or 24 V microswitches are available for indicating the

position independently of the mother board function.

Data that is real-time

ABB is pleased to introduce the NGC8106. Based upon the

industry leading NGC platform, the NGC8106 is a perfect

replacement for composite samplers. The user can now enjoy

real-time data instead of monthly averages, and shipping and

sample collection errors have been virtually eliminated.

Addin a multivariable transmitter and the NGC8106 becomes a

total energy meter. Or utilize the remote communications on

the 8106 to transmit real gas quality data to an existing flow

computer.

Data that is accurate

The NGC8106 is a single stream manual calibration device, it

is intended to be calibrated monthly or quarterly, so there is no

need to leave an expensive calibration blend at each GC site.

Easy to use and cost effective

The use of the NGC8106 eliminates many of the problems

associated with composite samplers. There are no sample

transport issues, no analysis costs, no lag in getting the

gas quality information into the gas accounting system and

instant alarming of potential data loss. While the initial cost of

the NGC and its installation may be higher than a composite

sampler. The sampler’s ongoing operation and maintenance

costs make the NGC8106 a viable economic alternative.

Data is difficult to obtain and not cost effective

Shipping requirements and DOT regulations make it

increasingly difficult to ship samples to the central laboratory.

These problems with composite sampler had to be tolerated

because the cost of a GC was too much to put on these lower

volume stations, UNTIL NOW.

Solution: NGC8106

Data that is real-time

ABB is pleased to introduce the NGC8106. Based upon the

industry leading NGC platform, the NGC8106 is a perfect

replacement for composite samplers. The user can now enjoy

real-time data instead of monthly averages, and shipping and

sample collection errors have been virtually eliminated.

Addin a multivariable transmitter and the NGC8106 becomes a

total energy meter. Or utilize the remote communications on

the 8106 to transmit real gas quality data to an existing flow

computer.

Data is not real-time

Typically it takes one month to collect sample before it is sent

to the laboratory for analysis. Although the analysis probably

only takes a week, it could still be another three weeks before

the technician is back at the site to collect the next sample

bottle. By the time the gas quality data is entered into the flow

computer it could be anywhere from 1-2 months old.

Data is not accurate

Although the lab analysis is very accurate it is only as good

as the sample handling practices that were used to obtain the

sample. IF the sample bottle is not properly purged or clean

when it was installed then the analysis data will be corrupted.

The error gets magnified when applied across a whole month

of gas production.

Data is difficult to obtain and not cost effective

Shipping requirements and DOT regulations make it

increasingly difficult to ship samples to the central laboratory.

These problems with composite sampler had to be tolerated

because the cost of a GC was too much to put on these lower

volume stations, UNTIL NOW.

Solution: NGC8106