Arena Service Manual
• Static damage may not be immediately evident.
• Static damage is cumulative.
• Both MOS and Bipolar integrated circuits may be
damaged by discharge of static electricity.
• Both digital and linear integrated circuits may also be
damaged.
Always repackage the removed ROMs or boards in the
original ESD packaging.
Do not remove or plug in any electronic component or
assembly while power is applied to the Instrument.
Do not remove fuse from or insert fuses into any circuit board
while power is applied to the board.
Fuses should be replaced only by the same rating and only by a
qualified service technician. Check for cause of the fuse
failure.
It is necessary to perform some of the adjustments with the
covers removed. Use extra care to prevent fluids from entering
or contacting the electronics of the Instrument.
1.4.3.2 Fluid
It is essential that all central concentrate supplies be equipped
with a manual shut-off valve at each Instrument position.
These shut off valves are required to prevent leaking when
service is performed on the concentrate regulator or trunkline.
These valves also prevent leakage when the female fitting shut
off does not completely seal.
To reduce the chance of a major concentrate spill or leakage
from the central concentrate line, it is recommended that the
concentrate supply fitting with shut-off be installed.
The water used to prepare the concentrate must conform to
the Association for the Advancement of Medical
Instrumentation (AAMI), ISO, EP Purified Water or other
local standards specific for water used in hemodialysis.
To prevent fluids from entering or contacting the electronics of
this Instrument, do not operate the Instrument or perform any
calibrations while the internal septa are not in place unless it is
specifically required.
If clogging is the result of massive precipitate formation in the
fluid path (such as might be caused by improper concentrate
selection or preparation errors), particle filter backpressure
1-12 157-1278-896, Rev A
March 2004
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