Hardy HI 1746-WS - Manual (Page 64)

HI 1746-WS WEIGH SCALE MODULE
5-4
f. Based on the example, the operating
range for this scale is 5-10 mVDC with
a 500 pound weight range. Understand
that after zeroing the instrument, the 0
reading refers to the zero reference point
and not absolute 0 mVDC or absolute 0
weight.
NOTE: Load cell/point measurements are checked with a dig-
ital volt meter at the J2 connector on the front of the
module or by using I
NTEGRATED T ECHNICIAN with the
HI 215IT Junction Box.
Load Check Step 1. Place a load (weight) on the scale or ves-
sel.
Step 2. Check to see if the weight reading changes
on the ladder logic display in the proper
direction.
• For example: If the ladder logic dis-
play reads 100 pounds and a 20 pound
weight is placed on the vessel or
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 Hard Cali-
bration. The HI 1746-WS reads the performance char-
acteristics of each individual load cell and detects the