American Weigh Scales (AWS) AL-311 User Manual
Page 15
15
AL-Series Manual
Problem:
The display shows “H” during weighing
Solution:
1. Weight is too heavy. Decrease the sample weight.
2. No Grounding.
3. The balance may be calibrated incorrectly (using weight lighter than the standard). Try
recalibrating.
Problem:
The display shows “L” during weighing
Solution:
1. Weight is too light.
2. No grounding.
3. The sample is leaning against something besides the weighing pan, or the pan is not
properly in place.
4. Check below the weighing pan, see if it is touching any objects.
Problem:
The display shows “E1” during weighing
Solution:
1. The display capacity has been exceeded (over 9999999)
2. The reference sample is too small. Use a larger reference sample.
Problem:
The display shows “E4” during weighing
Solution:
1. There is an error with the A/D converter. Unplug the power cord for 10 seconds, then
plug it back in.
Problem:
The display shows “E8” during weighing
Solution:
1. The gross weight value (net weight + tare weight) < 0. Press the TARE key.
2. If the error persists, unplug the power cord for 10 seconds, then plug it back in.
3. There was an error with the RS232 communication. Press the TARE key and try the
RS232 communication again.
4. The balance may be calibrated improperly, using a weight heavier than the standard.
Try recalibrating the balance.