A&D BA-T Series, Инструкция по эксплуатации

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26. Troubleshooting
Checking the balance performance and environment
Since the balance is a precision instrument, in some cases it may not be able to measure correct values
due to adverse effects of the measurement environment or measurement method.
If repeatability is poor when the sample is loaded and unloaded several times, or if the balance seems
to be operating abnormally, check the following items. If the problem persists after checking each item,
contact your local A&D dealer for repair. "Frequently Asked Questions" and answers to them are also
posted on our website (
https://www.aandd.jp ).
1. Checking that the balance works properly
Method 1 Use check functions to check the balance operation. Refer to “ 11.1. Daily check ” and
“ 11.2. Periodic check ”. Fatal failures are displayed as a message.
Method 2 As a simpler test, check the repeatability with an external weight.
Be sure to place the weight in the center of the weighing pan.
Method 3 As a precise test, check the repeatability, linearity, weighing value, etc. with a weight of a known
weight.
2. Checking that the measurement environment and method are appropriate
Check the following check items.
Operating environment
Is the table on which the balance is placed sturdy? (Specifically for BA-6TE, BA-6DTE)
Is the balance level? For how to adjust the bubble spirit level, refer to “
2.3. Installation considerations,
preparation and precautions ”.
Is the operating environment free from vibration and drafts?
Is there any strong electrical or magnetic noise source such as a motor near the balance?
Weighing method
Is the weighing pan set so that it does not touch other parts such as the breeze break and dust plate
frame? (Is it installed correctly?)
Do you always press the RE-ZERO button before placing your sample on the weighing pan?
Do you place your sample in the center of the weighing pan?
Did you perform a sensitivity adjustment before weighing?
Did you warm up the balance before weighing for at least an hour, or at least four hours for BA-6TE /
BA-6DTE, with the AC adapter connected to the power supply?
Sample and container
Is the sample free from moisture absorption or evaporation due to the influence of ambient temperature
and humidity?
Is the temperature of the container of the sample acclimatized to the ambient temperature? Refer to
“ 2.4. Precautions during use for more accurate weighing ”.
Is the sample free of static electricity? Refer to “ 2.4. Precautions during use for more accurate
weighing ”.
The sample may be charged with static electricity especially with the BA-6TE/BA-6DTE when the
relative humidity is low.
Is the sample a magnetic material (iron, etc.)? Care must be taken when weighing magnetic materials.
Refer to “ 2.4. Precautions during use for more accurate weighing ”.