Hardy HI 2151/30WC Single-Scale Controller - Manual (Page 137)

Chapter 8 - Troubleshooting
8-17
G - Error 18 During
Hard Calibration
ERROR 18
The difference between zero and span is less than +100
counts.
There are two places during HARD CAL where error 18 can occur.
ZERO and SPAN
G
ZERO SPAN
ERROR
18
?
Proceed with
Calibration.
Contact
Hardy Instruments
Customer Service.
800-821-5831
NO
The milli-volt signal reading did not show a positive
increase.
(1)
Use INTEGRATED TECHNICIAN to verify
Milli-volt levels.
(2) Compression Load cells can be installed
upside-down. Giving negative signal readings.
(3) Mechanical binding restricts the scales
movement.
(4) Load cell wires disconnected or improperly
wired.
(5) Improper load sharing or mechanical loading
on the load cell.
The SPAN weight to small.
(1)
100 counts out of 985,000 is very small
(100,000 lb scale would require 11 lbs.)
(2) Mechanical binding can mask weight readings
The new Zero Reference (ZRCNT) is larger
than the original Span (FSCNT)
(1)
At ZERO, arrow to SPAN
(2) Add the test weight to the scale
and perform the SPAN entry.
(3) After SPAN GOOD, arrow back to
ZERO
(4) Remove the test weights and set
the ZERO reference point
(5) Again perform the SPAN
operation and continue with the
calibration.
YES