PerkinElmer TGA 8000, Installation And Hardware Manual

Page: 69 / 94

Furnace Hangdown Wire Maintenance . 69
Furnace Hangdown Wire Maintenance
There are two hangdown wires associated with the furnace: a quartz (P/N N5370488) and a
nichrome (P/N N5370490) wire. These wires come in kits.
Maintenance of the furnace hangdown wire consists of the following:
•
Removing the Furnace Hangdown Wire
•
Installing the Furnace Hangdown Wire
WARNING: Before performing the procedures below, make sure that the furnace
has cooled sufficiently so that you do not accidentally burn yourself.
AVERTISSEMENT: Avant d'exécuter les procédures ci-dessous, assurez-vous
que le four a suffisamment refroidi pour ne pas vous brûler accidentellement.
Removing the Hangdown Wire
1. Lift the round cover straight up to gain access to the balance.
A platinum balance ribbon is connected to the left and right arms of the balance. The
ribbon has a loop at its end from which the hangdown wire is hung on the left side of
the balance. A tare weight, specific for the particular hangdown wire used, is hung
from the ribbon on the right side of the balance to offset the weight of the
hangdown wire, stirrup, and sample pan or crucible.
CAUTION: The platinum ribbon is extremely fragile. Care should be taken not to
exert force on the loop of the balance ribbon or on the hangdown wire after it is
attached. Handle tweezers with extra care when placed in the vicinity of the
platinum balance ribbon, the hangdown wire, or the stirrup. Tweezers can catch
any of the components and cause damage.
ATTENTION: Le ruban de platine est extrêmement fragile. Il faut veiller à ne pas
exercer de force sur la boucle du ruban de balance ou sur le fil de pendaison
après qu'il est attaché. Manipulez les pinces avec plus de soin lorsqu'elles sont
placées à proximité du ruban de balance en platine, du fil pendulaire ou de l'étrier.
Les pinces peuvent attraper n'importe lequel des composants et causer des
dommages.
2. To remove the hangdown wire from a non-autosampler TGA 8000:
i. Make sure that the anti-convection iris in the balance area is open all the way.
Place the hangdown wire guide on the end of the convection flange at the end
of the joint.
ii. Using tweezers, carefully remove the hangdown wire from the ribbon loop. Let
go of the hangdown wire.
To remove the hangdown wire from an autosampler system:
i. Make sure that the anticonvection iris is open all the way.
ii. Use tweezers to carefully remove the hangdown wire from the platinum ribbon
loop. Let the hangdown wire drop onto the wire guide.
iii. Grasp the hangdown wire with the tweezers while removing the guide.
iv. Carefully guide the hangdown wire down and out of the tube.