PerkinElmer TGA 8000, Инструкция по установке и эксплуатации оборудования

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Hangdown Ribbon Replacement . 71
Hangdown Ribbon Replacement
The balance mechanism of the TGA 8000 is designed with replaceable platinum hangdown
ribbons. If either the hangdown wire ribbon or the tare weight ribbon breaks, you can
replace it using the TGA 8000 Hangdown Ribbon Replacement Kit (P/N N5370478).
Owerview
The platinum wire suspension consists of an ultrathin platinum ribbon with a loop on one
end. The balance tare weight and the sample hangdown wire (quartz or nichrome) are
supported from the loop on their respective ribbons. A small glass sphere is affixed to the
other end of the ribbon. This sphere is used to suspend the ribbon from the glass capillary
tube which is permanently mounted to the balance beam. The capillary tube is flared at the
top to accept the ball on the ribbon. This design provides an inherently stable mount for the
ball so that, in a TGA 8000 without an autosampler, the ball does not need to be
permanently bonded to the capillary tube to achieve good balance performance. Should the
platinum ribbon break, it can be removed easily; a pair of tweezers can easily grip the ball so
that the ribbon can be removed.
For an autosampler system, the orientation of the platinum wire loop is important. If affects
the position of the hook which is critical in sample pan loading and unloading. The flared
tube design facilitates this alignment since the mount is stable. Once the loop is aligned, the
ball is bonded to the capillary tube using an easily removable rubber cement.
Parts Included in the Hangdown Ribbon Replacement Kit (P/N N5370478)
Platinum Ribbon Insertion Tool N5376741
Rubber Cement 09923480
Rubber Cement Application Tool N5376742
Ribbons N5370342
Replacing the Platinum Ribbon
1. Turn off the power to the analyzer.
2. Lift the balance dome straight up.
WARNING: Be careful not to touch components on the thermal controller PC
board behind the balance. They may be hot to the touch.
AVERTISSEMENT: Veillez à ne pas toucher les composants de la carte de circuit
imprimé du thermostat derrière la balance. Ils peuvent être chauds au toucher.
CAUTION: Be careful not to apply excessive force to any component of the
balance assembly. Permanent damage may result.
ATTENTION : Veillez à ne pas exercer de force excessive sur un composant de
l'ensemble de la balance. Un dommage permanent peut en résulter.
3. Locate the flared capillary tube mount and the ball support of the broken platinum
ribbon.