Introduction Cautions
xviii 046-004667-00 A7™ Operating Instructions
CAUTION: Use of other oxygen sensors may cause improper oximeter
performance.
CAUTION: Unintended movement may occur if the casters are not locked. The
operator should lock casters during use of the machine.
CAUTION: Unsecured devices may slide off the top shelf. Devices should be
securely attached to the top shelf.
CAUTION: The voltage on the auxiliary outlets is the same voltage as the outlet
into which the A7 machine is plugged. Ensure that devices plugged into
the auxiliary outlets are rated for the same supply voltage as the A7.
CAUTION: During the transport and storage of the vaporizer, block the gas inlet
and outlet of the vaporizer with plugs to prevent foreign substances
from entering the vaporizer.
CAUTION: Do not use any flow outlets as handles for moving the A7. The flow
outlets may become damaged. Use the metal side bars on the main
body when moving the A7.
CAUTION: Do not push down on the bag arm forcefully or hang heavy objects
onto it. Excessive weight may bend and damage the bag arm.
CAUTION: Use caution when disconnecting “quick connectors”, as the sudden
release of pressure may cause injury.
CAUTION: Avoid factors that can contribute to deterioration of the hose
assemblies. Factors include excessive bending, crushing, abrasion,
system pressures and temperatures that exceed hose ratings, and
improper installation.
CAUTION: Use care in lifting and manipulating the breathing system block during
removal from its mounting arm as handling may be awkward due to its
weight and shape.
CAUTION: When the electronic mixer is disabled, the backup flow control valve
can work. The initial flow is 1 L/min of O
2
. The backup flow display only
has a total flowmeter which range is up to 10 L/min.
CAUTION: Turn the backup flow controls slowly. To avoid damaging the control
valves, do not turn further when the flowmeter reading is outside the
range. When turning a flow control knob clockwise to decrease flow,
the flowmeter should reach 1 L/min before the knob reaches its most
clockwise mechanical stop (off) position. Do not turn any further when
the knob has reached the off position. Turning a flow control knob
counterclockwise increases flow.
CAUTION: Position the airway adapter properly so that the part connecting to the
gas sampling tube is pointing upwards. This prevents condensed water
from entering the gas sampling tube and causing an occlusion as a
result.
CAUTION: The watertrap collects water drops condensed in the sampling tube and
therefore prevents them from entering the module. If the collected
water reaches a certain amount, you should drain it to avoid airway
blockage.
CAUTION: The watertrap has a filter preventing bacterium, vapor and patient
secretions from entering the module. After a long-term use, dust or
other substances may compromise the performance of the filter or
even block the airway. In this case, replace the watertrap. Replacing the
watertrap once a month is recommended.