Can you explain the meaning of the IT Test Result Data?

Can you explain the meaning of the IT Test Result data? The Gross values makes sense to me, but Internal weight, JBOX weight and mV Per V's don't.

Hardy Process Solutions offers a feature called INTEGRATED TECHNICIAN (IT) on the HI 1746WS (requires WS 100 software to run on 1746), HI 1756WS, HI 1756FC, HI 1756-2WS,  HI 1769FC, HI 1769WS, HI 1769-2WS that use commands in the ladder logic, and the HI 2151/30WC, HI 3030, , HI 6300, HI6310, HI 4050 and the HI 4060 that use the front keypad and display. To utilize the IT feature you will need an IT capable controller (listed above) and an HI 215IT, HI 6010 or HI 6020 summing junction box.

The data from the IT test is normally used to troubleshoot load cell systems. If your system is equipped with the Hardy IT summing box, then the data will include individual load cell readings.
Without the IT summing box some of the individual load point data will not be available.

Combined means all load sensors are on the scale for this reading.

Load Sensor #x is the reading when the system switched off all inputs to the unit except from load cell #x.

Internal reference means the module has switched off the input from the load cells and switched in a reference voltage internal to the module that is used to test internal operation of module. Not all units have this internal reference feature.  This will test the internal stability of the module.  If readings are not stable, or you have an A/D error/failure, it would indicate an internal problem with the module.  Expected results would depend on the calibration of the unit.

*JBOX reference means the module has switched off the input from the load cells and switched to a reference load on the junction box that is used to test integrity of the load cell cable to weight controller.  Expected results would depend on the calibration of the unit.

Under the WEIGHSYSTEST:
Combined gross weight = total weight on scale
*Load sensor #x = gross weight from load cell 1, 2, 3 or 4. This is the amount of weight that is distributed onto that load cell.  This can reflect load imbalance or the difference from load cell to load cell's rate output.
Sum of all Load sensor #x should equal combined gross weight.
Internal reference weight is a reading based on an internal reference voltage.
Expected results would depend on the calibration of the unit.

PLC weigh Modules:
Under the TEST RESULTS:  (RTZ (return to zero):  This is a test to see if the current load on the scale is zero based on the calibrated zero point.  This is a test to see if the scale is responding properly and returning to its starting point when emptied.  The tolerance for this reading is the Motion tolerance plus the zero tolerance.  If any load cell does not return to the starting point of zero, it would indicate either: 1) possible binding on the scale; 2) there is weight on the scale; 3) lost calibration; 4) bad load cell.  Expected results would depend on the weight on the scale and the calibration.)
Word 1, return to zero test (if bit not set, returned to zero):
Bit 0 = combined weight is zero.
*Bits 1-4 = Load cell x (1-4), weight is at zero reference for that load cell when calibration was done.

Millivolt/volt combined = Current millivolt output per volt of excitation of all load cells in system.
*Millivolt/volt load sensor #x = individual millivolt output per volt of excitation of load cell #x.
Mv and/or Mv/v readings:  This is an indication of the output voltage from the load cells.  This is another way to check for load sharing, binding, etc.   Expected readings would depend on your load cells and the load currently on the scale.  Some units have sensitivity settings that change the ranging of the input to the unit based on the load cells you are using.