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Troubleshooting
25
6.0
Troubleshooting
The following section contains a troubleshooting chart for the QB Series scale. Refer to this chart to locate
causes and corrective actions to various conditions.
Condition
Cause
Corrective Action
Display does not
stabilize
• Wind
or
vibration
is
affecting
scale
• Set up balance elsewhere or under a
protective hood
• Scale is set on unstable surface
• Set the scale on a firm surface that is free
from vibrations
• Span is out of calibration
• Level the scale
• Perform span and zero adjustment
Displayed value is in
error
Weight value is drifting
• Tare value entered incorrectly
• Clear and re-enter tare value
• Balance is not set level
• Set balance level
• Span is out of calibration
• Perform span adjustment
• Interference with weigh pan or pan
support
• Check for foreign material under weigh pan
or weigh pan support
Linearity
error
• Mechanical
adjustment
has
changed
• Consult your local Rice Lake Weighing
Systems Service distributor
Display is blank
• Adapter is not connected
• Battery needs recharging
• Auto Power OFF is activated.
• Connect AC adapter to the scale and 120
VAC outlet
• Recharge battery
• Press the
ON/OFF
key
Comparator limits can
not be established
• Device is not set to comparator mode
• Reference value is greater than the
nominal capacity of the device
• Lower limit value is
≥
upper limit value
• Turn on comparator mode
• Change reference value
• Change lower limit value
Balance does not weigh
to nominal capacity
• Tare + sample weight exceeds capacity
• (Weight range = maximum capacity –
tare weight)
• Add the individual weights of the tare and
the commodity to determine if together they
are more than the nominal capacity of the
device
b
-ERR
• Electronic malfunction due to
e l e c t ro - s t a t i c d i s c h a r g e ( E S D ) o r
electro-magnetic interference (EMI)
• Consult your local Rice Lake Weighing
Systems distributor
L-ERR
• In counting mode, the unit weight of the
samples is less than the minimum
division of the device
• This commodity can not be counted with
this device
O-ERR
• Capacity is exceeded
• Use a test mass to ensure the balance can
weigh to its rated capacity
• Ensure that the commodity being weighed
is not in excess to the nominal capacity of
the balance
• Consult your local Rice Lake Weighing
Systems distributor
U-ERR
• Interference with the weighing pan or
weighing pan support
• Remove interference
Table 6-1. Troubleshooting Chart