Hardy HI 1769-2WS - Manual (Page 61)

Chapter 5 - Calibration
5-1
CHAPTER 5 - CALIBRATION
A Brief Description of
Chapter 5 Chapter 5 pertains to the calibration procedures for
the HI 1769-WS and HI 1769-2WS Weigh Scale
Modules. Alternatives to any procedures either
implied or explicitly contained in this chapter are not
recommended. In order for the Weigh Module to work
properly, it must be calibrated prior to operation. It is
recommended that the module calibration be verified
periodically or when not in use for extended periods
of time. Be sure to follow all the procedures com-
pletely to insure that the weights read by the module
are accurate. It is very important that the user and ser-
vice personnel be familiar with the procedures con-
tained in this chapter, before installing or operating
the Weigh Module.
NOTE: Do not perform a calibration while the application is
in operation.
Pre-Calibration
Procedures Step 1. Check to determine if the load cells have
been properly installed.
a. Refer to your load cell I&M manual for
proper installation instructions.
b. On some sensors and cells there is an
arrow that indicates the direction of the
applied load. If the arrow is pointing in
the wrong direction, change the position
of the load cell so that it is mounted in
the direction of the applied load.
Step 2. Check for Binding on the Load Cell or
other parts of the weighing system.
CAUTION: BINDING ON A SCALE/VESSEL OR LOAD
CELL DOES NOT ALLOW THE LOAD CELL
FREE VERTICAL MOVEMENT AND MAY PRE-
VENT THE INSTRUMENT FROM RETURNING
TO THE ORIGINAL ZERO REFERENCE
POINT.