HP 2300d Service Manual - Page 48
Caliper field test, Paper-finish field test, Moisture-content field test, a finish of 350 Sheffields
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Page 48 highlights
CAUTION Caliper field test The specified caliper differs with the type of media used. See "Operating environment" on page 30. Use a micrometer to measure for caliper in the field. Never use the coarse-adjustment end of the micrometer when measuring for caliper. The coarse adjustment will compress the paper fibers, resulting in an inaccurate reading. For example, if the fibers are compressed, 6 mil paper could measure as few as 3 mils. Always use the fine adjustment to measure for caliper. Using the fine adjustment, slide the micrometer along the edge of the paper and measure at one end. To double-check the accuracy of the reading, always measure again at the opposite end of the paper. Paper-finish field test Paper finish, or smoothness, can be accurately measured with a Sheffield meter. If this tool is not available, use a new U.S. dollar bill as a benchmark for comparing paper texture. A dollar bill has a finish of 350 Sheffields, which is 100 over specifications. If paper feels as rough as a dollar bill, it is recommended that users avoid continually using this paper in the printer. Moisture-content field test Use paper with 4 percent to 6 percent moisture content. A ream or sheet of paper can be measured with a moisture meter. In general, only evaluate the customer's storage environment to determine if excess moisture or dryness is the cause of a problem with paper. 46 Installation ENWW