Related Manuals for COLORADO OPTEC LPV-2
Summary of Contents for COLORADO OPTEC LPV-2
- Page 1 Air Pollution Control Division Technical Services Program APPENDIX GM7 Standard Operating Procedure for the OPTEC LPV-2 Transmissometer...
- Page 2 Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 2 of 24 Page intentionally left blank...
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Page 3: Table Of Contents
Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 3 of 24 TALBE OF CONTENTS Scope and Applicability ....................... 5 Introduction ..............................5 Method Overview ............................6 Format and Purpose ............................6 Summary of Method........................6 Definitions ............................. 7 Health and Safety Warnings ......................7 Cautions ............................ - Page 4 Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 4 of 24 Quality Assurance and Quality Control ................... 18 17.1 Quality Assurance ............................19 17.2 Quality Control ............................19 17.2.1 Calibrations .............................. 19 17.2.2 Documentation ............................19 Bibliography ..........................20 TABLE OF TABLES Table 1.
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Page 5: Scope And Applicability
Visual air quality is an element of public welfare. Specifically, it is an important aesthetic, natural, and economic resource of the state of Colorado. The worth of visibility is difficult to measure, yet good visibility is something that people undeniably value. Impaired visibility can affect the enjoyment of a recreational visit to a scenic mountain area. -
Page 6: Method Overview
Collins. Method Overview The Optec LPV-2 transmissometer measures the ability of the atmosphere to transmit light of a specific wavelength (generally 550 nm, green). It accomplishes this by continuously measuring the loss in light received from a light source of known intensity as the light beam travels a known distance. Unlike nephelometers, which only measure the scattering component of total extinction at a point source, the LPV-2 measures total extinction by integrating the light scattering and absorbing properties of the atmosphere along a selected sight path. -
Page 7: Definitions
Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 7 of 24 An eyepiece lets the operator precisely aim the light beam. The transmissometer is operated in continuous mode. In the continuous mode the transmitter projects the chopped signal continuously. The LPV-2 receiver gathers light from the transmitter, converts it to an electrical signal, isolates and measures the received transmitter light, and calculates and outputs visibility results in the desired form. -
Page 8: Personnel Qualifications
Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 8 of 24 Large bright surfaces can cause the visibility results to be artificially high. If bright surfaces are introduced into the view window, care should be taken to calibrate around them or mitigate them in some other way. ERSONNEL UALIFICATIONS General Personnel Qualifications are discussed in the CDPHE/APCD/TSP QAPP. -
Page 9: Calibration
1997), (Optec, Inc, 2011). Colorado’s LPV-2 transmissometer was upgraded to an LED light source in July 2012. The LED light source is a new technology that is utilized in the LPV-4 units. Thus Colorado’s LPV-2 unit contains components from the LPV-2 and LPV-4 platforms. The Optec LPV-2 and LPV-4 manufacturer's instruction manual covers all necessary procedures and controls for successful operation. -
Page 10: Logs And Forms
Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 10 of 24 The transmissometer site is assigned to a specific TSP employee qualified by formal training, experience, TSP on- the-job training, and contractor training. This employee is responsible for all aspects of assigned site monitoring operation, including but not limited to maintenance, repair, documentation updates, logs, etc. -
Page 11: Routine Preventative Maintenance And Scheduled Activities
Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 11 of 24 will take the appropriate action as soon as workload and priorities permit. TSP maintenance personnel will summarize work performed in a “message to central” for all non-scheduled maintenance activities. 10.4 Routine Preventative Maintenance and Scheduled Activities Preventive maintenance inspections and services should follow the recommended intervals by the EPA, the... -
Page 12: Maintenance Procedures
Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 12 of 24 Procedure Description Resource Figure 5 Fill out new monthly log sheets for the upcoming month. Figure 6 10.5.5 Verify time on data logger. Upon completion of the Monthly Maintenance site visit, all previous months log sheets are collected and placed in the monthly forms data collection box within 2 business days of being collected. -
Page 13: Message To Central Procedure
Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 13 of 24 From the top level menu to enable the data channel to resume reporting to the data logger, the user must: Choose menu options CDE (C Configuration Menu > D Configure (Data) Channels > E Enable /Mark Channel Online) to view the list of available channels. -
Page 14: Transmitter
Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 14 of 24 Select the Home tab > then Data Editors drop down menu. From the drop-down menu select, LogBook Entry Editor, and click the round green icon with white “plus” symbol, entitled, New Log Entry. Next, click on the Category: drop-drop down menu and choose Logger Message. -
Page 15: Monthly Inspection
Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 15 of 24 Check the position of the transmitter in the receiver reticule and record it on the daily log. Adjust the transmitter light source to the center of the receiver's reticule. Remove the window from the receiver housing and clean using isopropyl alcohol and a lint-free wipe. -
Page 16: Troubleshooting
Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 16 of 24 ROUBLESHOOTING 13.1 Environmental Factors Environmental conditions can play a role in the operational characteristics of analyzers. Some external factors may be constant while others are sporadic in nature. External factors to check include: Interference from reflected or indirect light? Is the shelter temperature stable throughout the day? Is vibration from other equipment causing an effect? -
Page 17: Primary Onsite Data Acquisition Systems
Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 17 of 24 14.1.1 Primary Onsite Data Acquisition Systems The APCD employs three different models of onsite DAS in the operations of its air monitoring network. These are the ESC 8816 data logger, the ESC 8832 data logger, and the Agilaire 8872 data logger. The 8816 data logger is the oldest type of data logger in the network and is a predecessor to the 8832 and 8872 data loggers. -
Page 18: Computer Hardware And Software
APCD/TSP in both electronic and hard copy formats. Visibility data is used in- house to determine compliance with Colorado’s visibility standard and is not uploaded to the AQS system. Monthly electronic data files and related printed material packets (maintenance forms, etc.) are produced. -
Page 19: Quality Control
Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 19 of 24 completeness, comparability, and sensitivity. The principal MQO’s are parameter specific and are listed in CDPHE’s QAPP. Guidance for developing DQI’s and MQO’s is given in EPA’s Quality Assurance Handbook (US EPA, 2013). - Page 20 Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 20 of 24 IBLIOGRAPHY Agilaire. (2009). AirVision Version 1. Knoxville, TN: Agilaire LLC. Agilaire. (2013). Agilaire Model 8872 Manual. Knoxville, TN: Agilaire LLC. Air Resource Specialist, Inc. (1993 - 2005). Transmissometer SOP - IMPROVE (Set of 11). Fort Collins, CO: Air Resource Specialist, Inc.
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Page 21: Figure 1. Typical Transmissometer Setup
Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 21 of 24 Figure 1. Typical Transmissometer Setup... -
Page 22: Figure 2. Transmissometer - Transmitter Log
Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 22 of 24 Figure 2. Transmissometer - Transmitter Log... -
Page 23: Figure 3. Transmissometer - Receiver Log
Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 23 of 24 Figure 3. Transmissometer - Receiver Log... -
Page 24: Figure 4. Maintenance Report Form
Appendix GM7 - Transmissometer CDPHE/APCD/TSP QAPP March 2021 Page 24 of 24 Figure 4. Maintenance Report Form...
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