92
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?
