METTLER TOLEDO
Mettler-Toledo AG
Laboratory & Weighing Technologies
Im Langacher
CH 8606 Greifensee
Greifensee, October 2006
Improvement of Anti-Static kit for XP analytical balances
We are pleased to inform you that the Anti-Static kit for the XP analytical balance (Item
number: 11107761) will be improved to generate even faster weighing results starting
September 2006.
The reason for the modification
The Anti-Static kit generates positive and negative ions. They are meant to neutralize the
weighing sample instantly. However, there is a slight chance that the side draft shield may
also accumulate some charges (depending on the condition of the surface of the glass and
the settling time after closing the door*). These may cause a small force which decays
slowly over time, resulting in slightly slower stabilization times.
1. Sample or tare container
is discharged correctly.
+
-+ + -+
- + -
2. But a small amount of ions
may remain on the draft shield glass
which could disturb stability and
repeatability.
3. After some time this
static charge will
disappear..
- + -+
+ - + - +
+ -
*When the draft shield was cleaned using cleaning detergent) and if small amounts of it remain on the
draft shield, ions may be accumulated.. If the settling time after door closing is configured to a
relatively long time (e.g. more than 10 seconds), the weighing result may be disturbed.
Description of the modification
The following 2 points will be improved.
1. The point-electrode will have 2 carbon wheels to ground the inner side of draft shield.
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METTLER TOLEDO
Mettler-Toledo AG
Laboratory & Weighing Technologies
Im Langacher
CH 8606 Greifensee
Greifensee, October 2006
2. One side draft shield with conductive material will be included in the kit to replace the
standard glass.
•
•
Inner side of glass is conductive material to
release accumulated ions.
Due to this special coating, the glass is slightly
colored.
How the improved Antistatic kit works
2 carbon wheels of the electrode are always touched on
the inner side glass (Grounding the side glass all the
time).
To keep the space for 2 carbon
wheels working correctly, the clip for
the current electrode does NOT need
to be installed.
Please exchange the side glass (near the
electrode) with the other glass which is
included in the kit (conductive material)
Conductivity can be checked with an
Ohmmeter on the inner side
With conductive glass and carbon wheels, the ions on the surface of draft shield are released
quickly and effectively.
When will the improved kit be available?
The improved Antistatic kit for the XP analytical balance will be delivered starting September
18th, 2006. *The item number will remain the same: 11107761
At the same time, the optional point-electrode (Item number: 11107762) will be improved to
be equipped with 2 carbon wheels and one side glass with conductive material will be
included in the package.
The delivery of the improved optional point-electrode will be starting September 18th, 2006.
*The item number will remain the same: 11107762
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METTLER TOLEDO
Mettler-Toledo AG
Laboratory & Weighing Technologies
Im Langacher
CH 8606 Greifensee
Greifensee, October 2006
How should we cope with customers already using the existing Antistatic kit?
Customers satisfied with the current Antistatic kit must not be informed.
If the customer NOT satisfied, please contact your local Product Manager to discuss the
situation.
If you have any question on this issue, please contact LMS. Helpdesk.lms@mt.com
Ambros Kohler
Greifensee, Oktober 2006
Mettler-Toledo GmbH
LabTec Market Support
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