DeVilbiss UltraNeb, Руководство по обслуживанию, Страница: 16 / 28

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16
2.
Start-up instructions
Insert test board and switch on device.
2
.
1
Measuring supply voltages
Earth for measurements for
2.1.1
to
2.1.5
is MP
1.
2
.
1
.
1
Supply v
8,5
V DC
measure ±
1,5
V MP
5
at input
7805
.
2
.
1
.
2
Supply v
5
V DC
Measure ±
0
.
5
V MP
6
at output
7805
.
2
.
1
.
3
Supply v
75
V DC
Measure ±
10
V at MP
2
.
2
.
1
.
4
. Voltage for patient fan motor
Measure at J
5
MP
7
Plus
Motor connection for push button Flow min.
7
V DC ±
1
V
Push button Flow max.
11
V DC ±
1
V
2
.
1
.
5
Voltage for axial fan
Measure at clamp J
13
MP
8
. Voltage
11
V DC ±
1
V
2
.
1
.
6
Voltage for heat tube
Measure at clamp J
1
MP
9
, MP
10
:
11
V AC ±
1
V.
Caution: change measuring device to AC !
2
.
2
Calibrating the power supply.
Start up device with nebuliser chamber.
2
.
2
.
1
Connect measuring equipment to measuring points
MP
2
and MP
3
.
(Measuring range
2
V DC). Switch on device using the “On/Off”
push button and carefully turn to maximum setting. Then
using regulator R
2
, adjust to a voltage of
0
.
450
volts ±
0
.
01
V.
100
mV at point MP
2
and MP
3
corresponds to
100
mA current
consumption for the power supply. Caution: when adjusting,
the current must not exceed
500
mA (
500
mV) !!
2
.
2
.
2
Set the vapour push button to its minimum setting
Measure voltage at point MP
2
and MP
3
at
0
.
300
Volt ±
0
.
04
V.
Enter max. and min. values in the log.
2
.
3
Setting dry-running protection
2
.
3
.
1
Set the vapour push button to the maximum setting
(turning right till it stops)
Measure voltage at measuring points MP
1
(earth) and MP
4
,
and adjust the voltage using regulator R
23
to approx
3
.
0
V ±
0
.
5
V. Enter value into start-up log.
2
.
4
Testing dry-running protection
2
.
4
.
1
Switch on device with nebuliser chamber empty
The dry-running protection must respond immediately, with
red LED and audible alarm.
2
.
4
.
2
Start the device with water in the nebuliser chamber
Separate nebuliser chamber from the device while in operation.
The dry-running protection must respond immediately, with
red LED and audible alarm.
2
.
5
Checking electrical safety
according to VDE
0751
, ICE
601
-
1
2
.
5
.
1
Earth wire
2
.
5
.
2
Earth resistance current
2
.
5
.
3
Housing resistance current
Trial run including testing of patient fan and timer.