Hardy ANY-WEIGH Bench Scales - Manual (Page 29)

Chapter 6 - Calibration
6-1
CHAPTER 6 - CALIBRATION
About Calibration of
the DeviceNet, Analog
and Universal Bench
Scales The DeviceNet and Analog version of bench scales
come pre-calibrated from the factory. For the Univer-
sal version make sure it is correctly wired to the
weighing instrument/indicator. Refer to the weighing
instrument/indicator manual for calibration instruc-
tions.
C2 Second Generation
Calibration C2 electronically calibrates a scale system without the
need for test weights. If you are using a Hardy Instru-
ments Controller, Indicator or Weigh Module, all
that’s required is to enter a reference point. Refer to
the instrument or module manual for instructions.
Test Weight
Calibration (Hard Cal) This is the traditional means of calibration requiring
certified class F test weights equal to a minimum of
80% of the rated scale capacity. Additionally three
weights between 10% and 100% of the scale capacity
should be available to check the mid-range. Several
low capacity weights equivalent to one or two instru-
ment divisions are necessary to check the system sen-
sitivity.
Material Substitution When certified test weights are not available you can
use an accurately weighed material to calibrate the
system. In this method, a material is weighed on a
secondary, calibrated scale and delivered to the site of
the scale to be calibrated. The secondary calibrated
scale should be of the same accuracy or greater and
have a capacity approximately equal to the scale
being calibrated.
Universal Scales HI
SBU Series Refer to the weighing instrument or module manual
for calibration instructions. C2
®
Second Generation
Calibration should only be used with Hardy weighing
instruments.
DeviceNet Scales HI
SBD Series The ANY-WEIGH DeviceNet Scale series come pre-
calibrated from the factory. If additional dead load is
permanently attached to the scale surface, a recalibra-
tion may need to be performed.