ABB AO2000-LS25 Laser analyzer

（5） Troubleshooting

The LCD displays various fault messages, such as "low transmission", "laser alignment error", "PLC reading error", etc. Based on the message explanation, corresponding measures are taken, such as cleaning the window, checking the connection, adjusting the alignment, etc. If the problem cannot be solved, download the error log and system log and contact the service personnel.

Electrical connection

（1） Transmitter unit interface

There are receiver connectors, main power connectors, service connectors, and network connectors, which are used to connect receiver cables, power and sensor inputs, service PCs, and Ethernet, respectively.

（2） Receiver cable connection

Detailed wiring of the receiver cable at both ends, including power supply, signal, temperature sensor, etc.

（3） Power cable connection

The wiring at both ends of the power cable includes temperature, pressure, flow probe input, and power input.

（4） RS-232 and Ethernet connectors

The functions of each terminal of the RS-232 connector and the wiring of the Ethernet RJ-45 connector.

（5） Ethernet connection to AO2000

According to the AO2000 software version, the method of connecting one or more laser analyzers is introduced, including IP address setting and network topology structure.

（6） Current circuit (4-20mA) input connection

The connection method of active and passive 4-20mA current loop input probes was demonstrated, and multiple instruments can be connected in series to the same probe.

（7） Power cable connection

The power cable is connected to the power supply unit, and the cable diameter should be within the range of 5-10mm. The power terminal can accommodate conductors with an area of less than 2.5mm ².

（8） Transmitter board - fuse and LED

The transmitter board has a main fuse and some LEDs to indicate the status of different power supply voltages. If the LEDs are abnormal, the fuse and power supply need to be checked.

Span and zero check options

（1） Span inspection with circulation pool

Used to verify the performance of the analyzer, non corrosive gases use a receiver unit with an internal volume of 100mm, corrosive gases use a dedicated span pool, initiate span mode through digital communication, flush the internal pool, measure span concentration, then flush residual gases and return to normal mode.

（2） Span and zero inspection with internal sealed pool

The receiver unit contains a sealed gas pool that is activated through digital communication for span and zero modes. The internal pool is moved to the laser beam path by a servo motor, and the absorption signal in normal mode is calculated and stored for subtraction during span inspection and measurement of span gas concentration.

Class I Division 2 Version Description

（1） Preliminary explanation

This version contains installation, operation, and maintenance information, requiring the use of Division 2 wiring methods, conduit sealing to prevent explosion spread, and following the installation instructions of the sealing compound manufacturer.

（2） Instrument Design

Composed of transmitter unit, transmitter connection box, receiver unit, and power supply box, the power supply box is not suitable for installation in Class I, Div. 2 areas.

（3） Product Data

Environmental conditions: working temperature -20 ° C to+55 ° C, same storage temperature, protection level IP65 (non certified part), pollution level 2, installation category II, altitude 2000 meters, humidity 0 to 95%.

Power supply: Input 100-240V AC, output 24V DC, transmitter unit input 18-36V DC, maximum 20W.

Interface: RS232 complies with relevant standards, Ethernet protocol 10/100Base-T.

CSA certification: applicable to Class I Division 2 Groups A, B, C, D, temperature code T4.

（4） Warning

failure to follow safety instructions may cause ignition of hazardous atmosphere， Causing serious personal injury and/or property damage, replacing parts may impair the applicability of Class I Division 2.

（5） Electrical installation

Safety precautions: The use of cable glands must comply with NEC standards and local regulations. Unused cable glands should be closed according to the manufacturer's instructions. Power supply units are not suitable for installation in Class I, Div. 2 areas. Service PCs should be placed in explosion-proof safety areas.

Electronic interface of transmitter unit: The receiver and main power supply Myers Hubs are defined by the factory, and communication can use one of the two Myers Hubs in the center.

Cable connection: including detailed wiring for receiver cables, power cables, RS232, and Ethernet connections.

ATEX Zone 2 Version Description

（1） Preliminary explanation

Contains installation, operation, and maintenance information for this version.

（2） Instrument Design

Composed of transmitter unit, receiver unit, and transmitter connection box, the power supply box is not suitable for installation in Zone 2 area.

（3） Product Data

Environmental conditions: working temperature -20 ° C to+55 ° C, same storage temperature, protection level IP66, pollution level 2, installation category II, altitude 2000 meters, humidity 0 to 95%.

Power supply: Input 100-240V AC, output 24V DC, transmitter unit input 18-36V DC, maximum 20W.