Dräger Medizintechnik
D
Contents
1 General Information About the Dräger Service Mode 3
1.1 Definition of the Original Status ...................................................................................3
1.2 Calibration Functions ..................................................................................................... 4
1.3 Reaction in the Event of a Technical Error (TE) ........................................................4
1.4 Error Messages During a Specific Test ......................................................................5
1.4.1 Power Supply Low .........................................................................................5
1.4.2 Pressure Low ..................................................................................................5
1.4.3 Pressure High .................................................................................................5
1.4.4 Mode Switch Position (IPPV/CPAP) .........................................................5
1.4.5 Mode Switch Position (IPPV/CPAP) .........................................................5
1.5 Tests in the Dräger Service Mode ...............................................................................6
2 Starting / Exiting the Customer Service Mode (CSM) 7
2.1 Test 001: Adjusting the Language ...............................................................................8
2.2 Test 002: Testing the Gas Supply ............................................................................. 10
2.3 Test 003: Position of the Pneumatic Switch (IPPV/CPAP) ..................................11
2.4 Test 004: Setting the Minute Volume Limits ............................................................12
2.5 Test 005: Buzzer Test, LED Test, and LCD Test .................................................... 13
2.6 Test 006: Adjusting and Reading Out the
Potentiometers f, VT, Tinsp, and Pmax 14
2.7 Test 007: Tachypnea Monitoring Configuration ..................................................... 15
3 Starting / Exiting the Extended Service Mode (ESM) 16
3.1 Test 011: Calibrating the Pressure Sensors P-Supply and P-LA ........................17
3.2 Test 012: Calibrating the Minute Volume Valve ...................................................... 18
3.3 Test 013: Adjusting and Displaying the Flow ......................................................... 20
3.4 Test 014: Reading in the Analog Channels ............................................................ 22
3.5 Test 015: Testing Basic Flow ..................................................................................... 26
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Dräger Medizintechnik
Contents
3.6 Test 016: Testing the Autozero Solenoid Valve ...................................................... 28
3.7 Test 017: Displaying and Calibrating the Autozero Offset .................................. 29
3.8 Test 018: Testing the Pressure Sensor Paw and
Triggering the Minute Volume Valve 30
3.9 Test 019: Testing the Expiratory Solenoid Valve .................................................... 33
3.10 Test 020: Testing the ASB Solenoid Valve ............................................................. 34
3.11 Test 021: Testing the Supply Pressure .................................................................... 35
3.12 Test 022: Testing the Minute Volume Valve (Slow) ............................................... 36
3.13 Test 023: Testing the Minute Volume Valve (Fast) ................................................. 37
D
3.14 Test 024: Testing the Differential Pressure Sensor ∆P and
Testing the Flow Measurement 38
3.15 Test 025: Testing the Pressure Switch PEEP-ASB .............................................. 40
4 Technical Error (TE) List 41
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5673.100 MicroVent 09/97 Service Mode Page II
1 General Information About the Dräger Service Mode
You can operate the Dräger Service Mode with the Info key and the Reset key. These keys
allow you to change the set values, to scroll through tests, or to confirm execution of a
specific test. The Dräger Service Mode is subdivided into the Customer Service Mode
(CSM) and the Extended Service Mode (ESM). The working language used throughout the
Dräger Service Mode is English.
The Dräger Service Mode in the MicroVent includes 20 tests:
• The first six tests (Test 001 through Test 006) are specifically designed for the customer
(CSM), but can also be used by Dräger service technicians.
• The other fourteen tests (Test 011 through Test 024) are part of the Extended Service
Mode (ESM) which is used to carry out calibrations. These tests are only accessible to
Dräger service technicians. To do so, the Dräger service technician must enter a
numeric code.
1.1 Definition of the Original Status
Each function in the Dräger Service Mode can be carried out separately. At the beginning of
the Dräger Service Mode and after completion of a specific test, the MicroVent enters one of
the following original status.
Table 1: Original Status of the Micro Vent in the Dräger Service Mode
I:E solenoid valve Off (expiration)
PN solenoid valve Off (PEEP is inactive)
Autozero solenoid valve Operated automatically
Exp. solenoid valve Off (normal position = expiration)
ASB solenoid valve Off (ASB is inactive)
MV valve Closed
Alarm LED Off
Buzzer Off
LCD backlight On
Paw alarm Deactivate
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Service Mode
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1.2 Calibration Functions
The following table lists the four calibration functions available in the Dräger Service Mode.
The data is stored in the EEPROM:
Table 2: Calibration Functions in the Dräger Service Mode
No. Function Mode Test No.
1 Adjusting the Language CSM/ESM 001
2 Calibrating the Pressure Sensors (Pvers, PLA) ESM 011
3 Calibrating the Minute Volume Valve ESM 012
4 Calibrating the Autozero Offset ESM 017
Caution:
After installing a new Control PCB, perform the calibration functions (Nos. 1 through 4)
specified in the table above.
After installing a new Sensor PCB, perform Test 011 “Calibrating the Pressure Sensors PSupply and P-LA”.
1.3 Reaction in the Event of a Technical Error (TE)
If the MicroVent detects a technical error, it will show the error number on the display. The
technical error and the name of the current test are displayed alternately at 2-second
intervals. In the event of a technical error, all tests can be carried out normally. The message
on the display disappears as soon as the technical error has been corrected.
A new Control PCB will generate the error No. 16 (invalid check sum in the EEPROM) before
initial calibration. This technical error will disappear as soon as all data has been calibrated.
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Service Mode
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1.4 Error Messages During a Specific Test
If the system detects and displays an error, you must confirm this error by pressing the Info
key and the Reset key simultaneously. Once the error has been removed, the specific test
can be selected and carried out again.
All potential errors and their cause are listed below:
1.4.1 Power Supply Low
Problem
Accu/Bat. empty
1.4.2 Pressure Low
Problem
Pressure low
1.4.3 Pressure High
Problem
Pressure high
No external power supply connected. The internal
power supply is no longer sufficient for safe
operation.
Gas supply pressure is too low.
A gas supply source is connected although no
pressure is required for this test.
1.4.4 Mode Switch Position (IPPV/CPAP)
Problem
The mode switch is not in the correct position.
Pos. IPPV/SIPPV
1.4.5 Mode Switch Position (IPPV/CPAP)
Problem
The mode switch is not in the correct position.
Pos. SIMV/CPAP
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Service Mode
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1.5 Tests in the Dräger Service Mode
Table 3: Service Mode Tests
Test number Test Name Mode
001 Adjust language CSM
002 Supply pressure CSM
003 Mode switch CSM
004 Adjust MV limits CSM
005 Buzzer & LED test CSM
006 Adjust f, V
, Ti, Pmax CSM
T
007 TACHYPNEA ALARM CSM
008 to 010 Not assigned
011 Calibration PSWI ESM
012 Calibration MV valve ESM
013 Flow set & measure ESM
014 Analog inputs ESM
015 Test basic flow ESM
016 Test autozero valve ESM
017 Autozero meas & cal. ESM
018 Set MV valve, Paw ESM
019 Test EXP valve ESM
020 Test ASB valve ESM
021 Test supply pressure ESM
022 Test MV valve slow ESM
023 Test MV valve fast ESM
024 Flow measurement ESM
025 Test pressure switch ESM
026-255 Not assigned
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2 Starting / Exiting the Customer Service Mode (CSM)
☞
Important:
In the Customer Service Mode (CSM), only Test 001 through Test
006 are accessible to the customer or Dräger service technician.
The other tests are deactivated.
Test 007 is only available in US software version.
• Turn the potentiometers for frequency f and for tidal volume VT clockwise as far as they
will go.
• Press and hold the Info key and the Reset key simultaneously and switch on the
MicroVent.
Display:
C u s t o m e r
Customer Service Mode (CSM)
Se r v i c e - M o d e
• Release the two keys.
Display:
A d j u s t l a n g u a g e
< – 0 0 1 + >
• Press the Reset key or the Info key to select Test 001 through Test 007.
• Press the Reset key and the Info key simultaneously to activate the respective test.
• Press the Reset key and the Info key simultaneously again to return to the Customer
Service Mode (CSM).
Exiting the Customer Service Mode (CSM)
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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2.1 Test 001: Adjusting the Language
This test allows you to adjust the language to be used during the MicroVent operation.
• Press the Reset key to select the desired language.
Display:
d e u t s c h
or
e n g l i s h
or
f r a n c a i s
or
e s p a n o l
or
s u o m e k s i
or
p o r t u g u e s e
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Service Mode
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or
i t a l i a n o
or
a m e r i c a n e n g l i s h
or
f r a n c a i s f r a n c e
or
n e d e r l a n d s
• Press the Info key and the Reset key simultaneously to adjust the desired language.
The MicroVent returns automatically to the Customer Service Mode (CSM).
Exiting the Customer Service Mode (CSM)
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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2.2 Test 002: Testing the Gas Supply
The pressure sensors must have been calibrated (test 011 in Extended Service Mode) befre
selecting test 002.
• Press the Reset key to select Test 002.
• Press the Info key and the Reset key simultaneously to activate Test 002.
Display:
P r e s s u r e h i g h
The gas supply pressure is sufficient.
or
P r e s s u r e l o w
The gas supply pressure is too low or the
device is not connected to a gas supply source.
• Press the Info key and the Reset key simultaneously to return to the Customer Service
Mode (CSM).
Exiting the Customer Service Mode (CSM)
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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2.3 Test 003: Position of the Pneumatic Switch (IPPV/CPAP)
This test allows you to check position of the IPPV/CPAP mode switch is checked. The
respective position is shown on the MicroVent display. The pressure sensors must have been
calibrated (test 011 in Extended Service Mode) befre selecting test 003.
If the pressure in the device is too low, or if the device is not connected to a gas supply
source, the warning “Problem pressure low” will appear. The problem must then be rectified
(establish gas supply) and subsequently confirmed with the Info and Reset key before test
003 can be called up again.
• Press the Reset key to select Test 003.
• Press the Info key and the Reset key simultaneously to activate Test 003.
Display:
P o s. I P P V / S I P P V
or
P o s. S I M V / C P A P
• Press the Info key and the Reset key simultaneously to return to the Customer Service
Mode (CSM).
Exiting the Customer Service Mode (CSM)
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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2.4 Test 004: Setting the Minute Volume Limits
This test allows you to check the settings of the minute-volume double-potentiometer
(plausibility test).
• Press the Reset key to select Test 004.
• Press the Info key and the Reset key simultaneously to activate Test 004.
Display:
M V – l o w = X X . X X
M V – h i g h = X X . X X
• Adjust the values listed in the table below using the potentiometer and check the values
shown on the display.
Table 4: Minute Volume Alarm Limit Settings
Values Adjusted with the Potentiometer Values shown on the Display
MV - high 2 L/min
10 L/min
20 L/min
MV - low 2 L/min
10 L/min
20 L/min
1.9 to 2.1 L/min
9.5 to 10.5 L/min
19 to 21 L/min
1.9 to 2.1 L/min
9.5 to 10.5 L/min
19 to 21 L/min
• Press the Info key and the Reset key simultaneously to return to the Customer Service
Mode (CSM).
Exiting the Customer Service Mode (CSM)
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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2.5 Test 005: Buzzer Test, LED Test, and LCD Test
This test allows you to check the audible and visible signals. The LEDs of the
internal/external power supply, the alarm LED and the backlight of the display come on. The
buzzer is activated and the pixels of the display are triggered.
• Press the Reset key to select Test 005.
• Press the Info key and the Reset key simultaneously to activate Test 005.
Display:
I N F O T E S T O N
R E S E T T E S T O F F
• Press the Info key to start Test 005.
• Press the Reset key to stop Test 005.
• Press the Info key and the Reset key simultaneously to return to the Customer Service
Mode (CSM).
Exiting the Customer Service Mode (CSM)
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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2.6 Test 006: Adjusting and Reading Out the Potentiometers f, VT, Tinsp, and Pmax
This test allows you to compare the positions of the potentiometers f, VT, Tinsp and, Pmax
with the values shown on the display.
• Press the Reset key to select Test 006.
• Press the Info key and the Reset key simultaneously to activate Test 006.
• Change the potentiometer settings for the frequency f, the tidal volume VT, the inspiratory time Tinsp, and the maximum pressure Pmax (see Table below).
The changed values are shown on the display.
Display:
F = X X. XX V T = X . X X X
T i = X . X P = X X . X
Table 5: Potentiometer Settings: f, VT, Tinsp and Pmax
Settings on the MicroVent: Values on the Display
f = 5 min
= 10 min
60 min
-1
-1
-1
VT = 0.1 L
= 0.8 L
1.5 L
= 0.2 s
T
insp
= 1 s
= 3.0 s
Pmax = 20 mbar
= 40 mbar
= 60 mbar
5.00 to 5.13 min
9.88 to 10.17 min
59.00 to 61.00 min
0.1 to 0.11 L
0.79 to 0.81 L
1.48 to 1.50 L
0.18 to 0.22 s
0.9 to 1.1 s
2.8 to 3.20 s
20.0 to 20.6 mbar
39.6 to 40.4 mbar
59.4 to 60.0 mbar
-1
-1
-1
• Press the Info key and the Reset key simultaneously to return to the Customer Service
Mode (CSM).
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Exiting the Customer Service Mode (CSM)
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
2.7 Test 007: Tachypnea Monitoring Configuration
This test is only available in the US software version. It enables the tachypnea monitoring to
be activated and deactivated. An alarm is given if the patient exceeds a spontaneous
breathing frequency of 30 min.
• Press Reset key to select test 007.
• Simultaneously press Info and Reset keys to activate test 007.
Display:
T a c h y p m e a a l a r m
I N A C T I V E
-1
over a period of 3 minutes.
• Press Reset key to activate alarm.
T a c h y p m e a a l a r m
A C T I V E
• Press Info key to deactivate alarm.
T a c h y p m e a a l a r m
I N A C T I V E
• Simultaneously press Info and Reset keys to return to Customer Servcie Mode (CSM)
Exit from Customer Servcie Mode
• Switching the MicroVent off and on again effects return to normal MicroVent operation.
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3 Starting / Exiting the Extended Service Mode (ESM)
In addition to the tests in the Customer Service Mode (CSM) (Test 001 through 006), you
have access to the fourteen tests in the Extended Service Mode (ESM) (Test 011 through
Test 024). The remaining Tests 025 through 255 are not assigned. To start the Extended
Service Mode (ESM), you must enter a specific numeric code.
• Turn the potentiometers for the frequency f and the tidal volume VT clockwise as far as
they will go.
• Press and hold the Info key and the Reset key simultaneously and switch on the
MicroVent.
Display:
C u s t o m e r
Customer Service Mode (CSM)
S e r v i c e Mo d e
• Release the Info key and the Reset key.
A d j u s t l a n g u a g e
< – 0 0 1 + >
• Adjust the number “222” using the Info key or the Reset key.
•Press the Info key and the Reset key simultaneously for approx. 5 seconds to start
the Extended Service Mode (ESM).
E x t e n d e d D r ä g e r
Se r v i c e M o d e
• Select the desired test with the Info key or the Reset key.
• Press the Info key and the Reset key simultaneously to activate the desired test.
• Press the Info key and the Reset key simultaneously again to return to the Extended
Service Mode (ESM).
Exiting the Extended Service Mode (ESM).
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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3.1 Test 011: Calibrating the Pressure Sensors P-Supply and P-LA
This test allows you to calibrate the MicroVent pressure sensors. Proceed as follows:
• Disconnect the MicroVent from the gas supply.
• Adjust the mode switch to IPPV.
• Select the Extended Service Mode (ESM).
• Select Test 011.
• Activate Test 011.
Display:
R e m o v e P r e s s u r e
• Simultaneously press Info and Reset keys to start calibration.
The pressure sensors are exposed to atmospheric pressure. The I:E valve switches over to
inspiration and, at the same time, opens the minute volume valve. The Offsets of the pressure
sensors are then stored in the EEPROM.
C A L I B R A T I O N
P_V E R S P _L A
• As soon as the pressure has been decreased in the system, press the Info key and the
Reset key simultaneously to store the calibration values.
The MicroVent returns automatically to the Extended Service Mode (ESM).
Exiting the Extended Service Mode (ESM).
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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3.2 Test 012: Calibrating the Minute Volume Valve
During the calibration sequence (Test 012), you will be prompted to perform specific steps.
The displayed flow value (Nom.) is the calibration point. At the beginning of calibration, the
most recent stored flow value is adjusted. You can change this value by pressing the Reset
key or the Info key. You cannot stop the calibration process, once it has started.
At each calibration point, the flow is to be adjusted by pressing the Info or Reset key such
that the flow value displayed on the external flowmeter matches the corresponding flow value
(Nom.) on the MicroVent display.
Tes t Setup
Wall supply connection
3–6 bar
D
Pmax
Micro Vent
L
G
g
40
20
D
0
mbar
V
40
30
60 mbar
20
Info
15
f
60
10
80- 10
5
MV
Y
10
8
50
6
4
2
→
12
20 L/min
VT
20
0,5
40
0,1
60
0CPAP
ASB
20
14
10
16
18
30
5
35 mbar
0
min
Reset
Tinsp
1,0
1
2
PEEP
CPAP
1,5 L
3 s
0,2
5
10
15
mbar30
Inspiratory hose
SIMV
CPAP
IPPV
SIPPV
°
r
Flow sensor
Flowmeter
10 to 120 L/min
• Adjust the mode switch to IPPV.
• Adjust the rotary knob for PEEP/CPAP to 0 mbar
• Adjust the rotary knob for ASB to 0 mbar
• Select the Extended Service Mode (ESM).
• Select Test 012.
• Activate Test 012.
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Important:
Allow the MicroVent to stabilize at each calibration point. Watch the
corresponding scale (Air or O
Display:
A d j u s t P E E P =
on the flowmeter.
2)
0 mbar (cm H
2
O) !
• Simultaneously press Info and Reset keys to call up calibration point.
N o m. = X X L / m i n
E N T E R = c a l. P o i n t
• If necessary, press the Info key or the Reset key to adjust the flow such that the value
shown on the display matches that indicated on the external flow meter.
• Press the Info key and the Reset key simultaneously to store the points (see the
following table) in the EEPROM.
Calibration
Tolerances of the set flow values SW-Version
values
10 L/min
15 L/min
30 L/min
50 L/min
60 L/min
70 L/min *
9.5 - 10.5 L/min
14.5 - 15.5 L/min
29.4 - 30.6 L/min
49.0 - 51.0 L/min
58.8 - 61.2 L/min
68.6 - 71.4 L/min
1.10, 1.21
1.21
1.10, 1.21
1.10, 1.21
1.10
1.10, 1.21
* If the calibration values (70 L/min) are not obtained, store the highest calibration values.
The last calibration point is calibrated and the MicroVent returns automatically to the
Extended Service Mode (ESM)
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Exiting the Extended Service Mode (ESM)
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
3.3 Test 013: Adjusting and Displaying the Flow
This test allows you to adjust the flow in steps of 100 mL. The measured flow is continually
displayed.
The I:E valve is switched on at the beginning of the test and switched off again at the end of
the test.
Tes t Setup
Wall supply connection
3–6 bar
Pmax
D
30
Info
40
20
D
f
60
0
V
40
60 mbar
20
10
80- 10
mbar
5
→
CPAP
MV
Y
10
12
8
50
6
4
20 L/min
2
XX.XX
15
V
T
20
40
60
0
ASB
14
10
16
18
5
0
T
1,0
0,5
1,5 L
0,1
PEEP
20
5
CPAP
30
35 mbar
Micro Vent
L
G
g
min
Reset
insp
1
3 s
0,2
10
15
mbar30
r
SIMV
CPAP
2
IPPV
SIPPV
°
Flowmeter
10 up to 120 L/min
Flow sensor
• Adjust the mode switch to IPPV.
• Adjust the rotary knob for PEEP/CPAP to 0 mbar
Inspiratory hose
• Adjust the rotary knob for ASB to 0 mbar
• Select the Extended Service Mode (ESM).
• Select Test 013.
• Activate Test 013.
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Display:
N o m. = X X . X L / m i n
A c t . = + X X. X L / m i n
• Adjust the flow values (Nom.) with the Info key or the Reset key (see the following table)
and check the display (Act.) on the MicroVent and with the external flowmeter.
Table 6: Flow Settings
Adjusted flow (Nom.) Flowmeter
10 L/min 9.0 to 11.0 L/min
15 L/min 14.0 to 16.0 L/min
30 L/min 27.6 to 32.4 L/min
50 L/min 46.0 to 54.0 L/min
60 L/min 55.2 to 64.8 L/min
70 L/min 64.4 to 75.6 L/min
• Press the Info key and the Reset key simultaneously to finish Test 013.
The MicroVent automatically returns to the Extended Service Mode (ESM).
Exiting the Extended Service Mode (ESM).
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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3.4 Test 014: Reading in the Analog Channels
You can display the desired analog channel by pressing the Info key or the Reset key. The
displayed measured value is continually re-calculated. A total of eighteen values are
displayed. A total of eighteen values is displayed (1023 LSB correponds to 5.0 V).
• Select the Extended Service Mode (ESM).
• Select Test 014.
• Activate Test 014.
☞
Caution:
The values shown in the following table apply to an operational
MicroVent equipped with a fully charged and connected
rechargeable battery pack.
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Table 7: Designation of the Analog Channels
No. Designation Remark
1 Poti _Pmax Front potentiometer, max. ventilation pressure.
2 Poti_Ti Front potentiometer, inspiratory time.
3 Poti_VT Front potentiometer, tidal volume.
4 Poti_f Front potentiometer, frequency.
5Poti MV Potentiometer for definition of the MV valve’s position.
6 P_ Flow Differential pressure of the flow measurement.
7 Paw Airway pressure.
8 Kontr_ VPSchalt Switched 5 V voltage supply.
9 MV low Front potentiometer, lower limit of minute volume.
10 MV high Front potentiometer, upper limit of minute volume.
11 Kontr VBat Rechargeable-battery or normal battery supply voltage.
12 Kontr Vext External power supply.
13 Kontr VAlm Power supply (batteries).
14 Kontr 5 V Internal 5 V of power supply.
15 P_Versorgung Supply pressure sensor.
16 P_Reserve
17 P_LA Lung demand valve pressure-supply sensor.
18 Akku Temp Temperature-sensor rechargeable battery.
Display:
P O T I P M A X
X X X ( X . X X X V )
P O T I T I
X X X ( X . X X X V )
P O T I V T
Left potentiometer stop: < 0.5 V
Right potentiometer stop: approx. 4.5–5.0
Left potentiometer stop: < 0.5 V
Right potentiometer stop: approx. 4.5–5.0
Left potentiometer stop: < 0.5 V
Right potentiometer stop: approx. 4.5–5.0
X X X ( X . X X X V )
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R 5673.100 MicroVent 09/97
Service Mode
Page 23
P O T I F
X X X ( X . X X X V )
Left potentiometer stop: < 0.5 V
Right potentiometer stop: approx. 4.5–5.0
P O T I M V
X X X ( X . X X X V )
P _ F L O W
X X X ( X . X X X V )
P _ A W
X X X ( X . X X X V )
K O N T R . V P S C H A L T
X X X ( X . X X X V )
M V _ L O W
X X ( X . X X X V )
M V _ H I G H
X X X ( X . X X X V )
This value is calculated from the position of the
MV valve. (This value isn´t defined).
Unpressurized 2.5 V ±150 mV.
Unpressurized 0.9 V ±0.1 V (offset).
Supply voltage
5 V (tolerance: ±0.1 V)
Left potentiometer stop: < 0.5 V
Right potentiometer stop: approx. 4.5–5.0
Left potentiometer stop: < 0.5 V
Right potentiometer stop: approx. 4.5–5.0
K O N T R _ V B A T
X X X ( X . X X X V )
K O N T R _ V E X T
X X X ( X . X X X V )
K O N T R _ V A I M N
X X ( X . X X X V )
K O N T R _ 5 V.
X X X ( X . X X X V )
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GBR5673100SM1.fm
R 5673.100 MicroVent 09/97
Supply voltage
Internal NiCd battery (approx. 9 V)
Supply voltage
12 V (tolerance: ±1 V)
Supply voltage
5 V (tolerance: ±0.1 V)
or
Internal AlkMn batteries
Monitoring
5V (tolerance: ±0.25V)
Service Mode
< 1 V if Internal AlkMn
battery pack isn´t
installed.
Page 24
P _ V E R S O R GU N G
Pressure sensor (P-supply):
(back pressure of the pressure regulator)
X X X ( X . X X X V )
The indicated value X.XXX V corresponds to the
calculated background of the pressure regulator
Example:
(in volts).
Background = indicated value minus the offset
• Disconnect gas supply.
• Note the Offset-Value of the
voltage (0.64 V).
(1 bar is equivalent to approx. 460 mV)
Offset = value indicated while the gas supply is
disconnected
• Connect gas supply.
• Note the measured value of the
voltage (1.456 V).
• Formula:
pressure result in Volt (1.456 V) – Offset value (0.64 V) = 0.816 V.
• Formula:
0.816 V : 0.460 V (fixed value) <–> 1.773 bar (back pressure of the pressure
regulator).
P _ R E S E R V E
(not used in the Dräger Service Mode.)
X X X ( X . X X X V )
P _ L A
X X X ( X . X X X V )
A K K U _ T E M P
Mode switch at position IPPV (< 2 V).
Mode switch at position SIMV (> 2 V).
Rechargeable-battery temperature sensor (NTC)
Charging/temperature monitoring
X X X ( X . X X X V )
• Press the Info key and the Reset key simultaneously to return to the Extended Service
Mode (ESM).
Exiting the Extended Service Mode (ESM).
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
For internal use only. Copyright reserved.
GBR5673100SM1.fm
R 5673.100 MicroVent 09/97
Service Mode
Page 25
3.5 Test 015: Testing Basic Flow
The basic flow supplied by the fixed restrictor R4 is to be checked in switch setting
IPPV/SIPPV.
The basic flow is fixed adjusted. It is measured continuously and displayed in the bottom line
of the display. The basic flow should pass through the inspiratory hose, the expiratory hose
and the ventilation valve. The desired value of the basic flow is shown in the top line of the
display.
Tes t Setup
Wall supply connection
3–6 bar
Pmax
D
30
Info
40
20
D
60
0
80- 10
mbar
V
20
CPAP
MV
40
Y
10
50
6
4
60 mbar
XX.XX
15
f
V
10
5
T
20
1,0
0,5
40
1,5 L
0,1
60
→
0
12
14
16
18
20 L/min82
PEEP
ASB
20
CPAP
10
30
5
35 mbar
0
Micro Vent
L
G
g
min
Reset
T
insp
5
SIMV
CPAP
1
2
3 s
0,2
IPPV
SIPPV
10
15
°
mbar30
Inspiration hose
Flow sensor
Seal connection with hand
• Set the mode switch to IPPV/SIPPV.
r
Flow sensor
Y-piece
• Adjust the rotary knob for PEEP/CPAP to 0 mbar
• Adjust the rotary knob for ASB to 0 mbar
• Select the Extended Service Mode (ESM).
• Select Test 015.
• Activate Test 015.
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R 5673.100 MicroVent 09/97
Service Mode
Page 26
Display:
N o m. = 4 . . . 7 L / m i n
A c t . = + X . X L / m i n
Nominal value of the basic flow
Actual value of the basic flow
The basic flow should be 4 to 7 L/min.
• Press the Info key and the Reset key simultaneously to return to the Extended Service
Mode (ESM).
Exiting the Extended Service Mode (ESM).
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
The following error message appears if the pneumatic switch is set to SIMV/CPAP.
P r o b l e m:
Remedy: You must exit the test, remove
the fault (by setting the mode switch to
P o s . S I M V / C P A P
SIMV/CPAP), and restart the test.
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GBR5673100SM1.fm
R 5673.100 MicroVent 09/97
Service Mode
Page 27
3.6 Test 016: Testing the Autozero Solenoid Valve
This test allows you to check the function of the Autozero solenoid valve. You can hear the
switching sound of the ASB solenoid valve. You can measure the valve voltage directly at the
Autozero solenoid valve. It should be 6 V ±0.5 V. You do not need to connect the device to a
gas supply to perform this test.
• Select the Extended Service Mode (ESM).
• Select Test 016.
• Activate Test 016.
Display:
I N F O: P o s . A C T I V E
R E S E T: P o s I N A C T
• Press the Info key to switch on the Autozero solenoid valve.
P o s. A C T I V E
R E S E T: P o s I N A C T
•Press the Reset key to switch off the Autozero solenoid valve.
P o s. I N A C T I V E
I N F O: P o s . A C T I V E
• Press the Info key and the Reset key simultaneously to return to the Extended Service
Mode (ESM).
Exiting the Extended Service Mode (ESM).
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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R 5673.100 MicroVent 09/97
Service Mode
Page 28
3.7 Test 017: Displaying and Calibrating the Autozero Offset
In the IPPV mode, the MicroVent ventilates the patient with the frequency (f), the tidal volume
), and the inspiratory time (Tinsp) values. The alarm messages are not active. The current
(V
T
offset (act. Offs) of the flow-measurement pressure sensor (Autozero) is displayed
continually in the lower section of the display. The filtered offset (fil. Offs) is indicated in the
top line of the display. The filtered offset compensates for the occurring fluctuations and has
a greater stability. A new Autozero value is calculated at one to two minute intervals.
• Adjust the mode switch to IPPV.
• Select the Extended Service Mode (ESM).
• Select Test 017.
• Activate Test 017.
Display:
f i l . O f f s = X . X X X V
a c t . O f f s = X . X X X V
filtered offset (fil. Offs)
current offset (act. Offs)
• Press the Reset key to calibrate the default offset (2.5 V).
f i l . O f f s = X . X X X V
c a l . d e f a u l t . O f f s
The filtered offset (fil. Offs) and the current offset (act. Offs) have the same voltage value. The
voltage should be approx. 2.5 V.
• Press the Info key and the Reset key simultaneously to return to the Extended Service
Mode (ESM).
Exiting the Extended Service Mode (ESM).
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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R 5673.100 MicroVent 09/97
Service Mode
Page 29
3.8 Test 018: Testing the Pressure Sensor Paw and Triggering the Minute Volume Valve
No control of the minute capacity valve occurs in this test. If no key is pressed, the motor will
stop. You can open or close the minute volume valve by pressing the Info key or the Reset
key.
Caution:
The minute volume valve might get stuck. To avoid this, do not
move the minute volume valve completely to its mechanical stops.
Carefully open or close the minute volume valve.
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R 5673.100 MicroVent 09/97
Service Mode
Page 30
Tes t Setup
Wall supply connection
3–6 bar
Pmax
D
Info
40
20
D
f
60
0
V
40
10
80- 10
mbar
5
→
CPAP
MV
Y
10
12
50
6
4
60 mbar3020
20 L/min82
XXX
15
V
T
20
1,0
0,5
40
1,5 L
0,1
60
0
14
16
18
PEEP
ASB
20
CPAP
30
5
35 mbar100
Micro Vent
L
G
g
min
Reset
r
Tinsp
5
SIMV
CPAP
1
2
3 s
0,2
IPPV
SIPPV
10
15
°
mbar30
Y-piece
Flow sensor
• Set the mode switch to IPPV.
• Adjust the rotary knob for PEEP/CPAP to 0 mbar
Manometer
–30 to 120 mbar
connector 8400904
Flowmeter
10 to 120 L/min
hose clamp
• Adjust the rotary knob for ASB to 0 mbar
• Select the Extended Service Mode (ESM).
• Select Test 018.
• Activate Test 018.
Display:
M V - P o t i = X X X X X
P a w = X X X m b a r
Measured value of the Paw pressure
sensor (mbar)
• Adjust a flow of 50 L/min with the Reset key.
• Adjust a pressure of 40 mbar via an external manometer using a hose clamp .
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Service Mode
Page 31
The Micro Vent displays a ventilation pressure of 40 mbar ±2 mbar.
• Press the Info key or the Reset key to open or close the minute volume valve.
• Press the Info key and the Reset key simultaneously to return to the Extended Service
Mode (ESM).
Exiting the Extended Service Mode (ESM).
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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R 5673.100 MicroVent 09/97
Service Mode
Page 32
3.9 Test 019: Testing the Expiratory Solenoid Valve
During this test, the expiratory valve can be switched on and off. Possible positions are: ASB
or Normal. The switching action of the expiratory solenoid valve is audible. The valve voltage
can be measured directly at the expiratory solenoid valve. The valve voltage should be 6 V
±0.5 V. You do not need to connect the MicroVent to a gas supply source in order to perform
this test.
• Select the Extended Service Mode (ESM).
• Select Test 019.
• Activate Test 019.
Display:
I N F O : P o s A S B
R E S E T : P o s N O R M A L
• Press the Info key to switch on the expiratory solenoid valve.
Display:
P o s i t i o n ASB
R E S E T : P o s N O R M A L
• Press the Reset key to switch off the expiratory solenoid valve.
Display:
P o s i t i o n N O R M A L
I N F O : P o s A S B
• Press the Info key and the Reset key simultaneously to return to the Extended Service
Mode (ESM).
Exiting the Extended Service Mode (ESM).
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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R 5673.100 MicroVent 09/97
Service Mode
Page 33
3.10 Test 020: Testing the ASB Solenoid Valve
During this test, the ASB solenoid valve can be switched on and off. The switching action of
the ASB solenoid valve is audible. The valve voltage can be measured directly at the ASB
solenoid valve. The valve voltage should be 6 V ±0.5 V. You do not need to connect the
MicroVent to a gas supply source in order to perform this test.
• Select the Extended Service Mode (ESM).
• Select Test 020.
• Activate Test 020.
Display:
I N F O : Pos ACTIVE
R E S E T : Pos NOT AC
• Press the Info key to switch on the ASB solenoid valve.
Display:
P o s ACTIVE
R E S E T : ASB NOT AC
• Press the Reset key to switch off the ASB solenoid valve.
Display:
Pos NOT ACTIVE
INFO : A S B ACTIVE
• Press the Info key and the Reset key simultaneously to return to the Extended Service
Mode (ESM).
Exiting the Extended Service Mode (ESM).
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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R 5673.100 MicroVent 09/97
Service Mode
Page 34
3.11 Test 021: Testing the Supply Pressure
During this test, the minute volume valve delivers an adjustable nominal flow. This nominal
flow is indicated in the top line of the display. The specified flow can be adjusted in 100-mL
steps using the Info key or the Reset key.
The pressure measured downstream of the pressure regulator is shown on the bottom line of
the display. The influence of an increasing flow on the internal pressure is observable.
• Select the Extended Service Mode (ESM).
• Select Test 021.
• Activate Test 021.
Display:
F l o w = 1 . 0 L / m i n
P r e s = X. X X X b a r
Adjustable nominal flow
Back pressure of the pressure regulator
• Press the Reset key and adjust a flow of 40 L/min.
The Micro Vent must display a value of approx. 1.6 bar (1.5 to 1.7 bar).
• Press the Info key and the Reset key simultaneously to return to the Extended Service
Mode (ESM).
Exiting the Extended Service Mode (ESM).
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
Important:
☞
Alarm message: Pressure low.
If the measured pressure falls below the alarm limit, the test is
aborted and the alarm Pressure low is given.
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R 5673.100 MicroVent 09/97
Service Mode
Page 35
3.12 Test 022: Testing the Minute Volume Valve (Slow)
During this test, the minute volume valve control is switched off. The minute volume valve can
be opened or closed slowly by hand.
Caution:
The minute volume valve might get stuck in the mechanical stop. To
avoid this, do not move the minute volume valve completely to its
mechanical stops. Open or close the minute volume valve carefully.
• Select the Extended Service Mode (ESM).
• Select Test 022.
• Activate Test 022.
Display:
I N F O M V c l o s e
R E S E T M V o p e n
• Press the Info key to slowly close the minute volume valve.
• Press the Reset key to slowly open the minute volume valve.
• Press the Info key and the Reset key simultaneously to return to the Extended Service
Mode (ESM).
Exiting the Extended Service Mode (ESM).
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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R 5673.100 MicroVent 09/97
Service Mode
Page 36
3.13 Test 023: Testing the Minute Volume Valve (Fast)
During this test, the minute volume valve control is switched off. The minute volume valve can
be opened or closed fast by hand.
Caution:
The minute volume valve might get stuck in the mechanical stop. To
avoid this, do not move the minute volume valve completely to its
mechanical stops. Open or close the minute volume valve carefully.
• Select the Extended Service Mode (ESM).
• Select Test 023.
• Activate Test 023.
Display:
I N F O M V c l o s e
R E S E T M V o p e n
• Press the Info key to fast close the minute volume valve.
• Press the Reset key to fast open the minute volume valve.
• Press the Info key and the Reset key simultaneously to return to the Extended Service
Mode (ESM).
Exiting the Extended Service Mode (ESM).
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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R 5673.100 MicroVent 09/97
Service Mode
Page 37
3.14 Test 024: Testing the Differential Pressure Sensor ∆P and
Testing the Flow Measurement
This test allows you to adjust a simple ventilation pattern. No alarms are given during this test.
You can toggle between the minute volume (Nom. and Act.) and the tidal volume (Insp and
Exp) on the display.
Tes t Setup
D
Pmax
30
Micro Vent
L
G
g
Info
40
20
D
f
60
mbar
60 mbar
10
80- 10
5
→
0
CPAP
MV
Y
10
12
8
50
14
6
18
4
20 L/min
2
0
V
40
20
XX.XX
15
V
T
20
0,5
40
0,1
60
ASB
20
10
16
5
35 mbar
0
min
Reset
T
insp
1,0
1
1,5 L
3 s
0,2
PEEP
5
CPAP
10
30
15
mbar30
r
SIMV
CPAP
2
IPPV
SIPPV
°
Y-piece
Flow sensor
Wall supply connection
3–6 bar
sponatenous breathing set 8403201
• Set the mode switch to IPPV.
• Select the Extended Service Mode (ESM).
• Select Test 024.
• Activate Test 024.
-1
• Adjust the frequency to 15 min
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and the VT to 1 L/min.
Service Mode
Page 38
Display:
N o m. = 1 5 . 0 0 L / m i n
A c t . = X . X X L / m i n
Nominal value calculated from VT and f
Measured flow value (13.7 to 16.3 L/min)
• Press the Info key to display the current tidal volume (the last applied respiratory stroke).
Display:
I n s p = X X X m L
E x p = X X X m L
Inspiratory tidal volume
Expiratory tidal volume
• Press the Info key and the Reset key simultaneously to return to the Extended Service
Mode (ESM).
Exiting the Extended Service Mode (ESM).
• Switch the MicroVent off and on again to return to the MicroVent normal operating
mode.
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R 5673.100 MicroVent 09/97
Service Mode
Page 39
3.15 Test 025: Testing the Pressure Switch PEEP-ASB
This test is only available from SW-Version 1.21. The digital signal (ON/OFF) of the pressure
switch PEEP-ASB is shown on the display.
• Select the Extended Service Mode (ESM)
• Adjust the rotary knob for PEEP/CPAP to 10 mbar
• Adjust the rotary knob for ASB to 5 mbar
• Select Test 025
• Activate Test 015
Display:
PRESS - SWITCH OFF
• Adjust the rotary knob for ASB to 15 mbar
Display:
PRESS - SWITCH ON
• Press the INFO key and the RESET key simultaneously to return to the Extended Service
Mode (ESM)
Exiting the Extended Service Mode (ESM)
• Switch the MicroVent off and on again to return the MicroVent normal operating mode.
For internal use only. Copyright reserved.
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R 5673.100 MicroVent 09/97
Service Mode
Page 40
4 Technical Error (TE) List
Table 8: Possible Errors in the Micro Vent
TE no. Alarm Cause Remedy
1 A/D WANDLER
Electronics Replace electronics.
TIMEOUT
2 KONTR_5 V Electronics Replace electronics.
3 POTI MV high Resistance outside range,
cable harness
Check the cable
harness and the
connector. If
necessary, replace the
front panel.
4 POTI MV low Resistance outside range,
cable harness
Check the cable
harness and the
connector. If
necessary, replace the
front panel.
5 KONTR_VPSCHALT Electronics Replace electronics.
6 KONTR_VEXT Incorrect ext. voltage Check ext. voltage
7 TASTE_LCD_HG Key sticks Check, if necessary,
replace the front plate
8 TASTE RESET Key sticks Check, if necessary,
replace the front plate
9 BEIDE TASTEN Key sticks Check, if necessary,
replace the front plate
11 POTI F Resistance outside range,
cable harness
Check the cable
harness and the
connector. If
necessary, replace the
front panel.
12 POTI VT Resistance outside range,
cable harness
Check the cable
harness and the
connector. If
necessary, replace the
front panel.
13 POTI Tinsp Resistance outside range,
cable harness
Check the cable
harness and the
connector. If
necessary, replace the
front panel.
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R 5673.100 MicroVent 09/97
Service Mode
Page 41
Table 8: Possible Errors in the Micro Vent
14 POTI_PMAX Resistance outside range,
cable harness
Check the cable
harness and the
connector. If
necessary, replace the
front panel.
15 EEPROM WRITE-
ERROR
16 EEPROM
CHECKSUMME
Electronics Calibrate, otherwise
replace electronics.
Electronics Calibrate, otherwise
replace electronics.
17 MV-VENTIL MV valve sticks Check, if necessary,
replace the valve
18 POTI_MV Tolerance Check, if necessary,
replace electronics.
19 SW WATCHDOG EPROM, electronics Replace EPROM or
electronics.
20 IRAM Electronics Replace electronics.
21 XRAM Electronics Replace electronics.
22 EPROM EPROM Replace EPROM
23 EEPROM PTC
EEPROM Replace electronics
FEHLER
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R 5673.100 MicroVent 09/97
Service Mode
Page 42
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