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21.Maintenance
21-1 Treatment Of The Balance
□ Clean the balance with a lint free cloth that is moistened with warm water and a mild detergent.
□ Do not use organic solvents to clean the balance.
□ Do not disassemble the balance.
□ Use the original packing material for transportation.
22.Troubleshooting
22-1 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 "6-2 Self-diagnosis
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 1mg model）
□ Is the balance level? Refer to " 2-2 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=A
series)
□ Has the balance been warmed up for one hour before weighing?
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