ABB AO2000-LS25 Laser Analysts User Manual

Calibration object: The PROPORTIONAL mode only adjusts the "calibration constant" and optimizes it based on the proportional relationship between the measured concentration and the standard concentration; Adjust the "calibration constant" and "linewidth parameter" simultaneously in GLOBAL mode, taking into account the reference measurement of absorbed linewidth.

Operation requirements: PROPORTIONAL mode does not require temperature and pressure environment control, does not require a password, and can be directly performed on the process site. It supports individual calibration of a single gas or automatic calibration of associated gases; GLOBAL mode requires stable temperature and pressure conditions (recommended 1.013bar, 23 ℃), uses standard gases and test cells, and requires advanced mode passwords (applied to ABB or distributors), making it more difficult to operate.

Applicable scenarios: PROPORTIONAL mode is suitable for daily calibration and adjustment when the deviation of process gas concentration is small (such as deviation<2-3%); GLOBAL mode is suitable for scenarios where laser spectral characteristics drift (such as after long-term use), core components such as laser modules/motherboards are replaced, or calibration effectiveness needs to be ensured over a wide temperature and pressure range.

Question 2: What are the key requirements for flange installation and purging system settings when installing ABB AO2000-LS25 laser analyzer, and what problems may arise if they are not met?

answer:

Key requirements for flange installation:

Flange specifications: DN50/PN10 standard flanges (inner diameter 50mm, outer diameter 165mm) are required. The diameter of the pipe/chimney opening should be at least 50mm, and the flange should be installed with perforations (in the diameter direction).

Tolerance requirements: The perpendicularity tolerance between the flange and the pipeline is ± 1.5 °, and the alignment tolerance must meet the requirements of DN50 flange δ min ≥ 40mm and DN80 flange δ min ≥ 55mm (where δ is the distance between parallel lines at the center of the flange).

Sealing requirements: During installation, it is necessary to ensure that the large O-ring between the flange and the alignment unit is evenly compressed, and the four M16 bolts need to be tightened evenly.

Consequences of failure to meet: Deviation in verticality or alignment can cause the laser to fail to align, resulting in a "Laser line up error"; Poor sealing of O-rings can lead to process gas leakage, contamination of optical windows, or pose safety risks.

Key requirements for setting up the blowing system:

Flange blowing: Use dry and clean instrument air (compliant with ISO 8573.1 Class 2-3, oil mist content ≤ 0.5mg/m ³) or nitrogen, with a flow rate of approximately 20-50 l/min and a recommended flow rate of 1/10 of the process gas flow rate.

Purging of transmitter/receiver unit: It should only be turned on under specific working conditions (such as high dust and corrosive environments), using nitrogen gas (to avoid damaging internal optical components with oil/water in the instrument air), with a flow rate of<0.5 l/min, to prevent excessive pressure inside the unit.

Failure to meet the consequences: Insufficient flange blowing flow will cause dust to deposit in the optical window, resulting in a decrease in transmission rate (warning of "Low transmission" appears); Excessive air or flow during unit blowing can damage internal optical components, affect measurement accuracy, and even lead to instrument failure.