Campbell Scientific PWC100 Present Weather Sensor Calibrator - Manual (Page 7)

PWC100 Present Weather Sensor
Calibrator
1. Introduction
The PWC100 is a customer field calibration validation device for the PWS100.
The PWC100 calibrator system simulates particle and visibility data for the
PWS100 allowing verification of the calibration constants held within the
system.
The following features are checked by the calibrator:
• Particle velocity
• Particle size detection
• Laser beam uniformity
• Visibility range
• Component aging
The PWC100 will give a go/no go indication of the PWS100 calibration to
show whether the instrument is within normal operating limits. If required, the
PWC100 can be used to partially recalibrate the PWS100. That method is not
described in this manual. Please contact Campbell Scientific for more details
or refer to the PWS100 manual.
2. Operation and Use
2.1 Operating Guidelines
Please ensure that there are no obstructions between the PWS sensor heads
before the tests are started.
Ambient temperature should be 20°C ± 10°C.
The test should not be performed in the following conditions:
• Do not perform the calibration when it is raining or during any other
precipitation event, such as snow, hail or drizzle.
• Do not perform the calibration when the local visibility is below
approximately 10,000 meters.
• Do not perform the calibration if there is a strong wind that could blow
debris into the sensing volume of the PWS.
The PWC100 is not suitable for long term outdoor use and is only designed to
be exposed for the duration of the calibration test. Long term exposure to
outdoor environmental conditions may cause damage to the unit.
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