Mindray WATO EX-55, Service Manual

Page: 38 / 322

3-2
3.2 Pipeline Tests
WARNING
z
Do not leave gas cylinder valves open if the pipeline supply is in use. Cylinder
supplies could be depleted, leaving an insufficient reserve supply in case of pipeline
failure.
1. Disconnect the pipeline supplies and close all cylinder valves. Bleed all the gas inside
the machine to let the pressure gauges go to zero. f the gauge fails to go to zero, it
indicates that the gauge is faulty.
2. Connect an O2 pipeline supply.
3. Set the system switch to the position.
4. Set the flow controls to mid range.
5. Check that the pressure reading on the O2 gauge is within the range of 280 to 600 kPa
(if not, adjust the O2 pipeline output pressure). Check that other gauges go to zero.
6. Disconnect the O2 pipeline supply.
7. As O2 pressure decreases, alarms for [
O2 Supply Failure
] and [
Drive Gas Pressure
Low
] should occur. The alarm for [
Drive Gas Pressure Low
] occurs only when O2 is
the drive gas.
8. Connect other pipeline supplies. Check that the readings on the gauges fall within the
range of 280 to 600 kPa.
3.3 Cylinder Tests
NOTE
z
To prevent damage, open the cylinder valves slowly.
z
After doing the cylinder tests, close all cylinder valves if cylinder supplies are not
used.
z
Turn the flow controls slowly. Do not turn further when the flow indicated through
the flowmeter is outside of the range to avoid damaging the control valve.
This test is not required if cylinders are not configured.