Hardy HI 2151/30WC Single-Scale Controller - Manual (Page 143)

Chapter 8 - Troubleshooting
8-23
O - Excitation
Monitor
ErrEXC Displayed on a formerly operating
system.
1. Compare the BaseR and the ReadR
readings.
These are the readings, in ohms, of
the load cell(s) connected in parallel.
a. A low reading indicates a
shorted or miswired load cell.
b. A high reading indicates an
open or missing load cell.
2. Isolate and measure the individual
load cell excitation OHMS and
compare to the load cell certificates.
The Advantage load sensor
certificates are located on the
WWW.Hardyinst.com website.
ErrEXC Displayed on a new system.
1. Was calibration completed?
2. Are all wires properly terminated?
3. Verify individual load cell resistance
readings.
4. If using C2 calibration, was the load
cell count correct?
5. Compare readings with the BaseR
and the ReadR. If correct, check for
barriers or miswired load cells.
Excitation Monitor
Continuously monitors the system excitation current. Checking for open or shorted load sensors,
or damaged or broken excitation wire(s). This includes the wires between the instrument and the
junction box. If the measured current ReadR deviates from the BaseR, an "ERRExC" (Error
Excitation) displays on the front panel. In a system with C2 load sensors, IT computes the correct
current and displays alarms if the initial measured current is out of tolerance. Without C2 load
sensors the initial current read becomes the standard, whether the initial current is right or wrong.
ERREXC
A comparison error has been detected by the load cell excitation
monitoring system. For more information on Excitation monitor
setup, see chapter 8 in the HI2151/30WC manual.
Load cell input is
actually damaged.
System is not
calibrated.
System was
calibrated using a
simulator or Intrinsic
barriers are present
The current measurements stored during calibration is that of a
simulator or system with Intrinsic Barriers and not the present
load cells. You will need to turn off the Excitaion monitor. The
values can only be set during calibration using the load cells.
Record the readR value and use for future comparison.
Load cell
Excitation wires
are disconnected.
Contact
Hardy Instruments
Customer Service.
800-821-5831
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