GBR Systems M-40, Operator'S And Service Manual

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M-40 OPERATOR & SERVICE MANUAL ISSUE 05/01 PAPER SELECTION
SECTION I – PAGE 5
corrective direction of Relative Humidity (RH) adjustment that
must be taken.
I.8b Adjusting Relative Humidity (RH)
The RH operating environment should be adjusted no more
than 5 - 15% up or down, while staying within the 40 - 60% RH
range.
I.8c Measuring Humidity
An accurate instrument for measuring humidity in storage and
operating areas will be required. Even work and storage areas
under automatic humidity control should be checked when wavy
or tight edge problems are experienced.
I.8d External Overloading
When external conditions are extremely hot and dry or hot and
humid, open doors can overload any system. Also, upward or
downward adjustments in controlled environment settings may
be required during dry winter seasons or during rainy summer
seasons.
I.9 PAPER STORAGE
Storage conditions, temperature and humidity can have a
definite influence on how paper behaves in printing and mailing
equipment.
General Storage guidelines
1. Store paper in original cartons and ream wrappers.
2. Store paper between 64 - 90º F (10 - 30º C) and 40 - 60%
Relative Humidity.
3. Always store paper up and away from cement floors and
away from cement block walls. Store the paper on shelves
or a wooden pallet. This will reduce moisture absorption.
4. If a high humidity environment exists, store any partially
used reams of paper in plastic bags.
5. If paper has picked up moisture content causing excessive
curl, store the paper in a less humid environment for 24 to
48 hours.
I.10 PAPER SPECIFICATIONS
PAPER WEIGHTS
NOTE: The minimum paperweight recommended for use in
the M-40 and M-8 INS is 24-pound bond paper. (90 GSM)
Grams Per Square Meter
The unit “Grams per Square Meter”(GSM or g/m2) is universally
accepted. The unit expresses the weight in grams of a square
sheet of paper with sides one meter in length or an equivalent
area.
Traditional Units
Traditional units express paperweight for stacks of 500 sheets
of each type of paper in a certain size. For example, the basic
size for copier paper is 17"x22", while the basic size for index
stock is 25"x30".