Hardy HI 2151/30WC Single-Scale Controller - Manual (Page 141)

Chapter 8 - Troubleshooting
8-21
M - HI Error
HI
The Load sensor output Signal has exceeded the
millivolt limits set in Configuration and/or the Internal
factory setting.
M
HI
ERROR
?
Proceed with
Weighing
Process
Contact
Hardy Instruments
Customer Service.
800-821-5831
NO YES
1) Verify the signal wires are properly connected.
a.
Verify load cell cable color code
(1)
Load Cell Certificate.
(2) Installation manual.
(3) Cable marking strips.
b. Broken signal wires act as antenna for EMI/RFI.
c. Load cell cable shields must be grounded only at the Weight
controller to dampen EMI/RFI signals.
2) The load cell output Signal voltage has exceeded 15 mV dc
a.
Use INTEGRATED TECHNICIAN to verify mV levels.
(1)
Verify total milli-volt signal level.
(2) Verify individual load cell milli-volt signals.
(a)
An individual load cells may be over-ranged
and exhibit high milli-volt readings.
(b)
Possible physical damage to the load cell.
(c) Internal Strain gauge bond broken.
(d) Moisture in the load cell cable or body.
3) Weight in the hopper exceeds the configuration Scale Capacity setting.
a.
Under configuration verify the Scale Capacity setting.
b. 105% of the Scale Capacity setting will cause a HI indication.
c. This is used only as a warning and does not effect calibration.
d. Optional communication signals are unaffected by this
indication.
4) Weight in the hopper exceeds the load cell capacity
a.
Mechanical forces or product acting on the scale overloads the
load cells.
b. Use INTEGRATED TECHNICIAN to verify Milli-volt levels.
5) Review Mechanical and Electrical Flow charts for additional tips. B1