User Manual

Checking the Calibration Span
Introduction
The Calibration Reference is a light scattering device that provides a constant
value (termed a “k” factor).
The Calibration Reference should be used as a reference to check factory
calibration span of the Haz-Dust IV.
When to check
the calibration
span
The calibration span should be checked under the following conditions:
• Once a month with normal usage.
• If the Haz-Dust IV is dropped or otherwise damaged.
• The first time you use the unit to double check the factory calibration.
Note
: The Haz-Dust IV should be sent into EDC annually for recalibration.
Conditions
The following conditions must be met before checking the calibration span.
Condition... For further information
see page...
The Sensor Optics must be clean. 5-11
The Environment must be clean. ---
The Battery must be fully charged. 5-7
Figure 5-1. Diagram of the Haz-Dust IV showing the locating pin on the calibration
reference.
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