Number 3150-2020
Revision 0.3
Date SEP 2005
Page 1 of 5
1.0 PURPOSE AND APPLICABILITY
The purpose of calibration and maintenance is to assure quality data capture and
minimize data loss by performing and documenting scheduled operational checks and preventive
maintenance. This technical instruction (TI) provides specific details for routine calibration and
maintenance of Campbell Scientific CS105 barometric pressure sensors. The sensor uses
Vaisala’s Barocap‹ silicon capacitive pressure sensor, which is designed for accurate and stable
measurement of barometric pressure.
Experienced technicians using this TI, Standard Operating Procedure (SOP) 3150,
Calibration and Routine Maintenance of Meteorological Monitoring Systems, and the
manufacture’s instrument manual should be able to adjust the equipment to fully meet all defined
specifications.
Calibrations are required under any of the following circumstances:
• Upon acceptance testing of a new instrument
• Upon installation or removal of the instrument at a field station
• Whenever control limits are exceeded
• Prior to any corrective action, service, or maintenance to any portion of the
instrument that affects its operational principle
• At a maximum interval of 6 months
2.0 RESPONSIBILITIES
2.1 PROJECT MANAGER
The project manager shall:
• Establish the project-specific calibration and maintenance schedule and coordinate
with the client as necessary.
• Establish the calibration reporting protocol to satisfy client requirements.
• Review calibration results.
• Identify inconsistencies in calibration results and initiate corrective action as
required.
• Review and approve any changes to calibration procedures.
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