Trouble-Shooting Guide - Adam Equipment Nimbus NBL Serie Manual De Instrucciones

16.1 TROUBLE-SHOOTING GUIDE.

BALANCE DOES NOT FUNCTION
Problems
The balance is dead
when power is applied
The display does not
turn on but the
calibration motor
moves when power is
applied
The display stays on
the initial test screen
when power is applied.
Calibration weight
motor is on.
BALANCE WORKS BUT IS NOT STABLE
Balance is unstable by
a few divisions
Balance is very
unstable and does not
weigh correctly
BALANCE IS NOT ACCURATE
You must have accurate and trusted weights to test a balance. If you suspect that the
balance is not accurate then you must know your weights are accurate. A balance
calibrated using a bag of flour is not accurate even if it works OK otherwise.
Balance is not accurate Repeatability
© Adam Equipment Company 2017
Possible causes
Power supply
failure
Power is getting
to balance,
display is not
working
Unstable balance
Balance not
working correct
Power supply
Noise or vibration
from environment
Friction in
mechanics
Mechanical
problems
Balance
programming
Electronic
problems
Eccentric loading
Suggestions
Check adapter is working
Check adapter is correct for the balance
Normal adapter is 18VDC, 830mA.
*Power supply circuit board failure
*Short circuit on any circuit board
*Display cables may be faulty
*Display module failure
*Check if balance is stable by using
service menu and view A/D values
Put draught shield over pan
Check power supplies
Check the balance is positioned correctly
to avoid vibration, wind or air movement,
it is on a solid table, It is not near sources
of heat or cool air,
Check balance with weights if problem
occurs when sample is used. Static
electricity on the samples can cause
drifting and instability.
Check the area around the weighing pan
for hair, dust, obstructions under the pan,
*A complete inspection of the mechanics
to look for sources of friction may be
needed.
*A complete inspection of the mechanics
to look for sources of friction.
*Verify the A/D is also unstable. If the
A/D is OK then suspect the programming
of the balance. Reset parameters, check
linearity and redo the calibration.
Some electronic problems can also cause
this. But all mechanical problems must
be resolved first.
Verify the balance shows the same value
when the same mass is placed on the
centre of the pan for a few tests.
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