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25.Troubleshooting
25-1 Checking The Balance Performance And Environment
The balance is a precision instrument. When the operating environment or the operating method is
inadequate, correct weighing can not be performed. Place a sample on the pan and remove it, and repeat
this several times. If the balance seems to have a problem with repeatability or to perform improperly, check
as described below. If improper performance persists after checking, contact the local A&D dealer for
repair.
"Frequently asked questions" and their answers are also posted on our website
<http://www.aandd.co.jp>.
1
.
Checking that the balance performs properly
□
Please check the operation of the balance by the self diagnosis function.
Refer to "8-2 Self-Check- Function".
Fatal faults are indicated by messages.
□
Check the balance performance using an external weight. Be sure to place the weight in the center of the
weighing pan.
□
Check the balance repeatability, linearity and calibrated value using external weights with a known
value.
2.
Checking that the operating environment or weighing method is proper
Operating environment
□
Is the weighing table solid enough?
(
Especially 0.001g model
)
□
Is the balance level? Refer to "3. Precaution " How to adjust the bubble spirit level.
□
Is the operating environment free from vibration and drafts?
□
Is there a strong electrical or magnetic noise source such as a motor near the balance?
Weighing method
□
Does the weighing pan rim touch anything? Is the weighing pan assembly installed correctly?
□
Is the RE-ZERO key pressed before placing a sample on the weighing pan?
□
Is the sample placed in the center of the weighing pan?
□
Has the balance been calibrated using the internal mass (one-touch calibration)? (Only for GX-M
series)
□
Has the balance been warmed up for one hour before weighing?
Sample and container
□
Has the sample absorbed or lost moisture due to the ambient conditions such as temperature and
humidity?
□
Has the temperature of the container been allowed to equalize to the ambient temperature? Refer
to "3-2 During Use".
□
Is the sample charged with static electricity? Refer to "3-2
During Use".
□
Is the sample of magnetic material such as iron? There are cautions about weighing magnetic
materials. Refer to "3-2 During Use".
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