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2
Function Test
2-1
Safety Test
Trained personnel has to perform a safety test as part of the
annual system inspection.
1. Perform a visual inspection. Make sure that
•
the fuse corresponds with the specifications indicated by
the manufacturer
•
labels and stickers on device are legible
•
the mechanical condition of the unit allows for safe
operation
•
the device is clean
2. Measure leakage currents according to DIN EN 60601-1/
IEC 601-1.
3. Measure protective conductor resistance according to DIN
EN 60601-1/IEC 601-1. The protective conductor resistance
is measured while device is connected to the power supply.
The maximum value is 0.2 W.
4. Measure the insulation resistance with 500-700 V DC. The
min. value is 50 MW. The electric strength with high voltage
cannot be measured.
As an alternative, perform safety test according to DIN VDE
0751 Section 1.
2-2
Damages Caused by Disinfectants, UV Rays,
etc.
The surfaces of the device components can be changed and/or
damaged by disinfectants used in the operating room or the
ozone released during the use of UV emitters. This requires the
following inspections:
The cables are to be checked for proper fit and condition. Any
cables suspected of being damaged or flawed in any way (e.g.,
insufficient insulation, breaks, malfunctioning contacts, etc.)
are to be replaced.
If the boards show signs of corrosion or other damage to the
contacts or soldering joints, they are to be replaced to ensure
the safety of the device/system.
Front panel and case are to be checked for damage. Check for
safety-and function-relevant damages. The proper function of
the control panel and displays is to be checked.
Fluid can enter the device via the insufflation tube connection.
This is detectable through the residue visible in the transpa-
rent tube in the area of the tube nozzle. If this is the case,
please replace the entire pneumatics block.
2-3
Testing the High Pressure Unit (HPU)
The high-pressure unit consists of the following:
•
Gas Intake Filter GIF
•
High Pressure Sensor HPS
•
High Pressure Controller HPC
•
High Pressure Heater HPH
•
High Pressure Valve HPV
2
Function Test
1. Connect manometer (0-70 bar) to gas bottle connection.
2. Remove tube (press plastic ring and pull out tube) from
HPU
output and connect a 0-7 bar manometer.
2
3. Connect gas supply.
4. Briefly open and then reclose the gas supply.
5. Wait 10 min. Pressure at 70-bar manometer may not have
dropped more than 5 bar.
•
Check gas connection
•
Replace high-pressure unit HPU
1. Open the gas supply line.
2. Use a felt marker to mark the position of the adjustment
screw
of the high-pressure controller (Fig. 2-3-1).
1
3. Turn adjustment screw
1
increase pressure until triggering of the high-pressure
valve
can be clearly heard (hissing sound).
3
4. Reverse screw
until you can no longer hear any hissing
1
sound. The then reached pressure has to be above 4 bar.
5. Reset the adjustment screw to the marked position.
•
Use the adjustment screw
for any adjustments.
1. Relieve pressure of tube at magnetic valve (briefly remove
and reconnect tube) until a stable final value of 3.2 bar is
reached (±0.6).
2. Remove manometer and reconnect tube.
at high-pressure controller to
of the high-pressure valve
3
US-9
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