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5-1
Chapter 5
Recalibration
Introduction
To maintain the highest accuracy the DWT should be recalibrated at regular intervals.
The exact period between recalibrations is dependant on ambient conditions and use. As a
general guide, recalibration period should be more than 1 year and less than 3 years.
Do's and Don'ts
Don'ts
• DO NOT release high pressure using any of the valves — ALWAYS use the Capstan
to reduce high pressure before opening any valve.
• DO NOT rotate the Weight Stack at its TOP or BOTTOM position.
• DO NOT remove the GRP cover.
• DO NOT transport with fluid in the system.
• DO NOT allow fluid to fall below the recommended level.
Do's
• DO change the operating fluid at the first sign of contamination.
• DO have the Deadweight Tester and Weight Set recalibrated at regular intervals.
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