Hardy Process Solutions HI 1769-2WS, Operation And Installation Manual

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Chapter 5 - Calibration
5-5
scale, the ladder logic display should
read 120 or some value over 100.
• If the ladder logic display reads 100
pounds and a 20 pound load is placed
on the vessel or scale and the reading
is 80 pounds, the reading is going in
the wrong direction and indicates
some problem with the system.
• If the ladder logic display is reading
improperly or shows no change there
is something wrong with the setup.
Step 3. If the ladder logic display changed weight
in the proper direction, remove the weight
and proceed to calibrate the module.
C2 Calibration
About C2
Calibration C2 calibration requires C2 load sensors. If you do not
have C2 load sensors you must perform a traditional
calibration with test weights which we call a Hard
Calibration. The Weigh Module reads the perfor-
mance characteristics of each individual load cell and
detects the quantity of load cell(s) in the system. C2
Calibration can be performed via Allen Bradley RS
LOGIX 5000/500.
C2 Calibration
Using Ladder
Logic Step 1. Check to be sure that the parameters have
been setup for your weighing process. (See
Chapter 4, Setup)
Step 2. We have provided a Ladder Logic example
explaining how to perform the C2 Calibra-
tion. The Ladder Logic example is avail-
able on the Hardy Web Site:
http://www.hardysolutions.com
Step 3. Click on “Support”.
Step 4. Click on “Sample Programs”.
Step 5. You will find the sample programs under
the HI 1769-WS Heading.