Rice Lake MC Series Mass Comparator, A&D Weighing - MC-6100 - Manual (Page 56)

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15. MAINTENANCE
z Do not use organic solvents to clean the balance. Clean the balance with a lint free cloth that
is moistened with warm water and a mild detergent.
z Do not disassemble the balance. Contact the local A&D dealer if the balance needs service or repair.
z Use the original packing material for transportation.
16. TROUBLESHOOTING
16-1 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.
Checking that the balance performs properly
z Check the balance performance using the self-check function as described in “6-1 Automatic
Response Adjustment / Self Check Function”.
An error display appears when a malfunction is found.
z Check the balance repeatability using an external weight. Be sure to place the weight in the
center of the weighing pan.
z Check the balance repeatability, linearity and calibrated value using external weights with a
known value.
Checking that the operating environment or weighing method is proper
Operating environment
z Is the weighing table solid enough (especially for the balance with a minimum weighing value
of 0.0001 g)?
z Is the balance level? Refer to “3-1 Before Use”.
z Is the operating environment free from vibration and drafts? Has the breeze break been installed?
z Is there a strong electrical or magnetic noise source such as a motor near the balance?
Weighing method
z Does the weighing pan touch the breeze ring or anything? Is the weighing pan installed
correctly?
z Is the RE-ZERO key pressed before placing a sample on the weighing pan?
z Is the sample placed in the center of the weighing pan?
z Has the balance been calibrated using the internal mass (one-touch calibration)?
z Has the balance been warmed up for 30 minutes before weighing?