Kistler-Morse KM Weigh II - Manual (Page 118)

Appendix H. Error Message
H-2
3. Warning: Add Or Subtract
More Material . .
Explanation
While performing an Auto Calibration, you
added or removed material from the vessel.
The amount of material you moved produced
a change of less than 9000 counts. The
Weigh II will go ahead and calibrate the
system with the entered values. However, for
good calibration accuracy, a larger change in
counts/larger movement of material is
recommended.
Solution
Verify that the correct amount of material was
actually moved. Recalibrate when possible
with a larger movement of material.
4. All Channels are Hidden
Explanation
Vessel monitoring results are not shown on
the display because all channels are hidden.
Solution
Display all hidden channels again by
disabling Hide.
1. Put the Weigh II in Manual Mode.
2. Press the Shift Key (Shift LED illuminated)
and then press the ‘9’ Key.
3. The display acknowledges that Hide is
disabled. You can now scroll through all of
the channels in Manual Mode or switch to
Auto Mode.
5. All Channels are Disabled
Explanation
The Weigh II is not monitoring any channels
because all channels are disabled.
Solution
Display selected disabled channels again by
turning Enab off.
1. Put the Weigh II in Manual Mode.
2. Follow the path Main/Service/ADC/Enab.
3. Use the Up and Down Arrow Keys to scroll
to the channel that you want to enable.
Press the F1 Key to turn the channel on.
4. Repeat Step 3 as desired for other chan-
nels.
6. ADC Overrange (+/-)
Explanation
The sensor input is causing the counts to go
above 2,097,151 (if +) or to 0 (if -) because
one of the legs of the excitation voltage is not
functioning.
Solutions
1. Check the wiring of the sensor to
the junction box and junction box to
the Weigh II. Correct loose, damaged
(shorted), or incorrect wiring.
2. If there is no problem with the wiring, one
or more sensors may be damaged. Follow
troubleshooting procedures detailed in the
sensor manual to
locate the damaged sensor(s). Replace
if required.
3. If there is no problem with the sensors or
the wiring, check the power supply by
measuring across the +Ex and -Ex on the
Weigh II.
• If the Weigh II is wired to Kistler-Morse
sensors/transducers, verify that the
voltage is approximately 12 volts.
• If the Weigh II is wired to foil-gage
transducers, verify that the voltage
meets the transducer manufacturer’s
requirements.
If the voltage is incorrect, adjust AdjEx
(Main/Service/ADC/AdjEx) until the correct
voltage is measured. If you cannot obtain
the correct voltage, replace the power
supply.
4. If Steps 1 through 3 indicated no problem,
measure the millivolts across the In+ and
In- terminals on the motherboard. This
reading is the actual signal coming back
from the sensor/transducer. For Kistler-
Morse sensors/transducers, the reading
should be less than 1 volt.
• If the reading is less than 1 volt, check
Gain (Main/Service/ADC/Gain). If Gain
is set correctly, the A/D converter is
probably damaged. Consult with
Kistler-Morse.
• If the voltage is greater than 1 volt,
recheck wiring, sensors, and power
supply as described in Steps 1
through 3.