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Important:
Clean the probe with the included cleaning card before performing a probe zero.
Simultaneously press and hold both probe buttons firmly until the Gage beeps and the
arrows point outward. Do not place anything in the measurement opening during this
procedure.
SHORTCUT:
Simultaneously press and hold both probe buttons firmly until the Gage beeps and
displays 0. This can be performed from the main measurement screen without having to
access the menu.
Tape Grade
Selects a replica tape grade. Required when Linearize mode (HL) is ON.
C - Coarse
XC - Extra Coarse (default)
NOTE:
Coarse Minus and X-Coarse Plus grades are not supported in Linearize mode since the
only function of these two grades is to improve upon the accuracy of C tape at its low
end and XC tape at its high end, something the PosiTector RTR H will automatically do
when measuring HL. When Linearize mode is OFF, the PosiTector RTR H will measure
all grades of replica tape just like a conventional spring micrometer.
Linearize
This is the default measurement mode. Linearize mode is ON when this box is ticked
and the HL appears on the display.
An undesirable characteristic of replica tape is that measurements made with analog
spring micrometers are most accurate near the middle of each grade's range and least
accurate at the outer ends of each grade's range. That is why two other grades, Coarse
Minus and X-Coarse Plus, are used to check and, if necessary, adjust measurements at
the lower and upper ends of the primary range of 20-115 microns (0.8-4.5 mils).
Inside the primary range, the upper end of the Coarse grade range and the lower end of
the X-Coarse grade range share a 38 - 64 micron (1.5 -2.5 mils) overlap region. Current
Testex instructions describe a relatively complicated and time consuming procedure
(the average of one reading using Coarse grade and one reading using X-Coarse
grade) that is used to knit the Coarse and X-Coarse subranges together to achieve