Hardy HI 1756-2WS - Manual (Page 58)

HI 1756-WS WEIGH SCALE MODULE
5-6
Step 4. Press “The Button” again to perform the
C2 Calibration. Once the calibration is
completed the Scale LED returns to a
steady green.
NOTE: If you do not press the Button again within 20 sec-
onds, the calibration process times out.
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 Instruments Inc. Web
Site:
http://www.hardyinst.com
Step 3. Click on “Support”.
Step 4. Click on “Sample Programs”.
Step 5. You will find the sample programs under
the HI 1756-WS Heading.
Hard Calibration Hard Calibration is the traditional method of calibra-
tion that uses test weights. Hardy recommends that
the test weights total 80 to 100% of the scale capacity.
Hard Calibration
Procedures Step 1. Place the low calibration weight (the
weight can be zero) on the scale.
Step 2. Send a Cal Low Command (CALLOW-
CMD)
• The Cal Low Command - sets the
“calLowCount” parameter to the cur-
rent A/D average counts when doing a
hard calibration. An Integrated Tech-
nician function gets called during low
calibration.
• Command Number: 0x64 (Hexadeci-
mal)
• Channel Number: 0 or 1
• Number of Elements: 8