Checkline ZD2 - Manual (Page 6)

6 7
4.2 Special Calibration
Special Calibration is available when measuring on a horizontal material path with the
rollers pointing down. Please request a “down” calibration.
Special Calibration is also available for a specific material type and size so long as the
material fits the mechanical limits and range of the instrument. The customer must
supply a 10-ft sample (3 meters) of the material.
Note: Special calibration is available for a single sample only.
4.3 NIST Calibration
While all ZD2 and ZF2 instruments are furnished with a Calibration Certificate which
certifies that they have been calibrated in accordance with factory procedures and were
found to meet all published accuracy specifications, such calibrations do not fulfill
ISO-9000 requirements since no record of measured values are kept or are submitted.
Where ISO-9000 requirements are to be met, NIST calibration is optionally available
but must be specified at time of order placement or after repair.
4.4 Calibration Verification Schedule
Frequency of calibration accuracy verification depends on many factors. These include
frequency and extent of tension overloads, operating speeds, length of operating times,
environment, care in handling, etc, Such
4.1 Calibration with Factory Standard Filaments
All ZF2 and ZD2 Tension Meters are calibrated with laboratory weights suspended
from factory Standard nylon monofilament sizes, as noted in the table below. Any dif-
ference in process material size and rigidity from the Standard materials may result in
some error. For over 95% of applications, the error is not significant and can be
ignored since readings are generally treated as production setup values or are used for
comparative purposes. In those cases where highest accuracy is required, a correction
chart showing Readings vs. Actual Load should be made up by the user or “Special”
calibration should be specified when an order is placed.
Standard Calibration Monofilament Sizes
Monofilament
Model Range (g) Diam. (mm)
ZF2-5 1-5.0 0.12
ZF2-10 1-10 0.12
ZF2-12 1-12 0.12
ZF2-20 2-20 0.12
ZF2-30 3-30 0.15
ZF2-50 5-50 0.15
ZF2-100 10-100 0.15
ZD2-30 3-30 0.15
ZD2-50 5-50 0.15
ZD2-100 10-100 0.15
ZD2-150 20-150 0.15
ZD2-200 20-200 0.15
ZD2-300 20-300 0.15