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Number 4250-2010

Revision 0.1

Date MAY 1996

Page 1 of 37

1.0 PURPOSE AND APPLICABILITY

This technical instruction (TI) describes procedures for servicing and calibration testing of

Handar 540A/570A Data Collection Platforms (DCPs). This TI, as referenced in Standard

Operating Procedure 4250, Servicing and Calibration of Optical Monitoring Dataloggers,

specifically describes procedures for:

• Performing post-field inspections

• Performing post-field timing and performance checks

• Performing routine laboratory servicing and cleaning

• Checking and performing laboratory modifications

• Programming the DCP

• Performing pre-field operational tests

• Documenting all servicing tasks

• Archiving servicing, repair, and calibration records

Handar 540A/570A DCPs are used as the primary dataloggers in the IMPROVE

transmissometer network.

2.0 RESPONSIBILITIES

2.1 PROJECT MANAGER

The project manager shall:

• Verify that all Handar 540A/570A DCPs are serviced at least annually.

• Verify that calibration, timing, and transmission checks are performed on all Handar

540A/570A DCPs at least annually.

• Verify that all Handar 540A/570A DCPs are operating within factory specifications

prior to being shipped to the field for use at an operational monitoring site.

• Verify that all Handar 540A/570A DCPs that do not operate within factory

specifications are returned to Handar for factory servicing and recalibration.

• Ensure that all DCP servicing is documented and archived in accordance with the

procedures described in this TI.

2.2 INSTRUMENT TECHNICIAN

The instrument technician shall:

• Perform and document all servicing, modifications, calibration checks, and operational

tests.

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