Perform the hard calibration self test -15, About soft calibration -15 – Hardy HI 2151/30WC Single-Scale Controller User Manual
Page 93
Chapter 6 - Calibration
6-15
Hard Calibration Self
Test Procedures
(Traditional Method
Using Test Weights)
Perform the Hard
Calibration Self Test
Step 1.
Press the -/Test/Clr button. The Self Test SLFTST Sub-Menu
appears.
Step 2.
Write down all the Hard Calibration self test parameters on
the Self-Test, Calibration Results form. (See Appendix C, HI
Document # 0570-0016-01 for single controllers or 0575-
0016-02 for multiple controllers) Please photocopy as many
copies of the form(s) as you need.
Step 3.
Press the down arrow
↓ button to pause the test.
Step 4.
To review the test results, Slot 1 for example. Press the down
arrow to pause the Self Test. Press the up arrow one time
and the value for Slot 1 appears for example "none". Write
"none" down in the results column for Slot 1 on the Self Test -
Calibration form. The user can continue to push the up arrow
to review more results, or let the controller resume the self
test until the tests are completed.
Step 5.
There are two tests which are Pass/Fail. The Check Sum and
the RAM test. If the controller fails either one of these tests,
contact your local representative or Hardy Instruments, Cus-
tomer Support Department.
Soft Calibration
Procedures for Single
Load Cell/Point
Systems
NOTE:
Soft Calibration for systems with more than one load cell/point contact: Hardy Instru-
ments Inc., Customer Support Department.
About Soft
Calibration
•
Soft-Cal is a procedure that quickly calibrates a scale system, on-
site, without test weights, material substitution or forced calibra-
tion.
•
The process uses the certified, full scale mV/V output (sensitivity
and range) of each load cell.
•
The full scale mV/V output of each load cell is mathematically
combined with a measured reference point, usually but not always
zero, to calibrate the scale.
•
The full scale mV/V data is on the calibration certificate which is
shipped with every Hardy load cell.
•
The process assumes a consistent center of gravity on the scale with
even distribution.