Operating Manual WD 425E
Rev. 1.
1
, LS Page 13 of 34
78563_E rev 1.1.doc
L
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I
R
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●
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I
The gradually increasing test pressure is depicted optically by dots. Each dot corresponds to a given pres-
sure level, see chart below.
L
●
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I
R
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I
280 start 100
150
200
230
260
280
full
start 100
150
200
230
260
280
full
200 start
50
100
130
150
180
200
full
start
50
100
130
150
180
200
full
Filling phase
Selected holding
pressure
normal
280 mbar
normal
280 mbar
reduced
200 mbar
reduced
200 mbar
Test pressure
280 mbar
2.74 V
230 mbar
2.34 V
The endoscope is pressurized to target pressure of 280 / 230 mbar (relative). If the target pressure of 280 /
230 mbar (relative) not attained within 10 minutes, display shows error 170 or 175.
Setting phase
Upon reaching test pressure of 280 / 230 m bar, 10 seconds of dwell time is given to allow stabilizing. At end
of dwell period, all dots disappear momentarily and the „I” at the end of the dot row are shown in blinking
mode. At this moment, the automatic leak test is launched.
Test:
For the duration of the test, the “I” keeps blinking. Depending on setup calibration, a waiting period of 30 or
60 seconds is observed. Should pressure drop by more than 2.5 m bar per minute, i.e. 52 mV, error 171 or
176 is shown. As the pressure drops, the dots disappear according to pressure values.
Venting
(applies also after endoscope protection)
The endoscope is being vented. In case the endoscope cannot be brought to a value below 1.5 V within 10
minutes, error 174 / 179 appears.
If test is interrupted either by the IO or the door key, venting is initiated also. The display returns to “Program
ready”. Blinking of door key ceases.
1.3.5 Automatic Leak Test
The automatic leak test is always and only performed at the beginning, after program start. Once the pres-
sure test is completed, the actual wash process may be launched. The descaler rinsing and the filling proc-
ess, however, may be started already but must remain until after the pressure test has been completed.
Filling and pressure test and the filling process is indicated on the display analog to the manual leak test, and
the door button blinks also. The indication „Descaler rinsing“ is shown only at the beginning.
If the test is deactivated in the setup, then this function is completely dropped.
1.3.6 After Endoscope Processing
Once the endoscope is removed from the machine and the rack, small quantities of remnant water may be
found in the endoscope. To prevent germ formation in the endoscope channels, they must be completely
blown out.
It is recommended to store endoscopes in a drying cabinet.