23
5. Handling Precautions
Matters to consider during operation
(
１
) The outlet temperature should be above 100
°
C otherwise may result in bad performance of the
blower.
(
２
) Do not use substance containing flammable organic solvent as the sampling solvent.
(
３
) When the heater is opened do not leave the spray nozzle inlet and the installation part of the
product catcher open for long time. Make sure the heater is ventilated.
(
４
) Should there be some leakage problem between product catcher and lower metal part, the dry
powder might accumulated in the lower part of the blower and will not fall into the product
catcher. Therefore please pay special attention when installing the product catcher.
(
５
) The content of product catcher is 750ml. In normal cases, some 200~250g powder will almost
account for 80% of its capacity. Under this cases, to continue operation may result in lower
powder catch rate. Therefore, please stop the operation, and take out the powders which are
already in the catcher.
(
６
) When the samples are not gushed out any more, it means the mesh of spray nozzle might be
clogged. In this case please turn on NEEDLE KNOCKER to remove the clogs. Every time you
press the switch, the needle will enter into the mesh for 1 second. The needle will go out and in
inside the mesh automatically if the button was hold for 3 seconds. In the case when the clog
problem is too serious for the NEEDLE KNOCKER to clean up, please remove the nozzle, and
clean it. During operation, if you want to disassemble the nozzle tube B, please stop the
automatic operation of NEEDLE KNOCKER first. To remove the nozzle tube A, please switch
off the needle valve first.
(
７
) The nozzle mesh is around 0.7mm. When the sample is severely clogged, please use our parts
to remove the clog, this part has a bigger diameter than the mesh.
(
８
) If the sample does not deliver from the liquid delivery pump, this might be caused by one of the
following reasons: the sample tube was crushed flat by the roller of pump; the inner wall of the
tube was attached together; clogged nozzle; sample viscosity too high, etc. Please confirm
these one by one, and start operation until it resume to normal condition. In addition, based on
the performance of the pump and nozzle, the sample viscosity is normally as 300~400cp as
the upper limit.
(
９
) The sample tube is made of silicone rubber; it might expand and split after attached by
halogen
solvent or acid solvent. Please pay more attention during operation.
(
１０
) There should be someone guarded during operation. Special attention should be paid on the
samples in the nozzle which are easily clogged. To continue operation with a clogged nozzle,
the sample tube will come off from the nozzle, and the samples will flow out. Unexpected
accidents may result.
(
１１
) To maintain the unit, when the HEAD switch is at UP position, please do not put beaker or
samples on the pump stand. The reason is the upper frame will turn around by 90°which might
touch the connection pipe. When lowering the upper frame, please do it manually until the
frame has return to the upper position of the drying chamber, and then turn the HEAD switch
down.