Service Manual SAHARA 4

Service Manual

SAHARA 41

Manufacturer and customer service
address:

Device data:(to be completed by the customer)

SARSTEDT AG & Co. KG
Sarstedtstr. 151588 Nümbrecht
Germany

Type: SAHARA 4
Serial No.:
Place of installation:

Phone: +49 (0) 22 93-30 50
Fax: +49 (0) 22 93-305 282
E-Mail: info@sarstedt.com
www.sarstedt.com
Last modified:

July 2023

Issue date:Inventory No.:Service Manual SAHARA 4
Table of contents
1

Safety advice...........................................................................................................................................42

Symbol description.................................................................................................................................43

Device setup............................................................................................................................................544.1

Preventive controls and maintenance by the service personnel..........................................................5
Maintenance via integrated service functions.............................................................................................54.2

System update........................................................................................................................................75
5.1
5.2
5.3

Repair......................................................................................................................................................7
List of spare parts.....................................................................................................................................7Open and close the housing......................................................................................................................8
Replacing the fuses...................................................................................................................................86
6.1
6.2
6.3
6.4

Technical information..............................................................................................................................8
Technical data ..........................................................................................................................................8EMC advice...............................................................................................................................................9
Circuit board assembly and circuit diagrams .............................................................................................9
Error messages ........................................................................................................................................97Accessories...........................................................................................................................................118

Appendix ..............................................................................................................................................119

Check list for preventive inspection.....................................................................................................1210

Decontamination certificate.................................................................................................................1311Notes......................................................................................................................................................1411Notes......................................................................................................................................................15

Service Manual SAHARA 41

Safety advice• Follow the advice in the instructions for use.
• Repairs, maintenance and inspections on the device must only be conducted by authorised persons and organisations
who have the know-how and the appropriate tools and test equipment available. Maintenance and repairs for which thedevice interior must be opened using tools may not be carried out by third parties and must only be carried out by themanufacturer.
• For ordering of spare parts always specify the serial no. of the device.
You will find the serial no. on the device and on the cover sheet of this service manual.
• Only use original spare parts for service works. Spare parts must not be modified.
• Before removing the cover turn off the device and disconnect it from the local power supply system.
• After service works always inspect the device functions if the service works may have an effect on the safety orfunctioning of the device.
• If necessary, exchange of single components is explained separately by an instruction for repair,which is delivered together with the spare part.

2Symbol descriptionFollow instructions for use
WARNING
Important information. If ignored a serious or life-threatening injury may occur.
WARNING
Important information. If ignored an electrical shock due to dangerous voltage may occur.
CAUTION
Important information. If ignored a minor injury may occur.
CAUTION
Helpful information on the appropriate use of the device. If ignored an operating error, malfunction ordevice defect may occur
Permissible pressure range

Permissible temperature range

Store in a dry place

Item number

Serial number

CE mark4

Service Manual SAHARA 4

Medical device

ManufacturerCountry of manufacture

Manufacturing dateUnique product identification

Separate collection of electrical and electronic equipment

Alternating current

3

Device setup
8931796452
1. Housing cover

6. Agitator mechanism

2. Lower part of the housing

7. Fan heater

3. Warming plate

8. Infrared sensor

4. Positioning frame

9. Position fan

5. Collection tray

4

Preventive controls and maintenance by the service personnel

4.1

Maintenance via integrated service functions

4.1.1

Activating the service functions

The integrated service functions can be activated via the options menu of the device.
• Switch on the device and when it goes into standby mode press the buttonon the display.

• Select the menu item for the system information.
• Touch the red logo

in the upper left corner and hold for a few seconds.

The service functions are activated within the options menu after pressing the button

again.

5

Service Manual SAHARA 4

The service functions are deactivated again after switching off the device.

4.1.2

Overview of service functions

After activation, the following integrated service functions can be selected via the extended options menu:
Service functionDescription of the service function

Scanning area

Representation of the scanning area of the infrared sensor.

External calibration

See sec. 4.1.3

Test position fans

See sec. 4.1.4

Data base management – Delete data base

Database maintenance function:
Database stored in the device with the registration andtempering data records is deleted.

Lock options menu

See sec. 4.1.5

Error memory

The last 10 error messages that occurred on the device are displayedwith date and time.

4.1.3

External calibration

By means of the external calibration, the temperature of the warming plate heated to approx. 37 °C can be recorded using areference clinical thermometer with an accuracy of at least ±0.5 °C and then compared with the temperature of the warming
plate determined by the device.
A thermometer block, available separately (see sec. 7), is required in addition to a clinical thermometer for external calibration.
• Remove objects from the warming plate and switch off the device for at least 15 minutes.
• Switch on the device and activate the service functions (see sec. 4.1.1).
• Activate the process via the “External calibration” menu item in the options menu.
• Insert the clinical thermometer into a suitable opening on the thermometer block. When prompted by the display,place the thermometer block with clinical thermometer onto one of the front heating zones (see Figure).
• After confirming this process, close the cover.
The warming plate and the thermometer block on top of the warming plate are heated for approx. 15 min.
• When prompted by the display, start temperature measurement with the clinical thermometer and enter the reference
temperature read off via the touch screen.
• Remove the clinical thermometer together with the thermometer block from the warming plate.
After confirming this process, the result of the external calibration is provided on the touch screen and on a USB stick.

4.1.4

Checking the position fans

By means of this service function, a function test of all position fans can be carried out.
• Switch on the device and activate the service functions (see sec. 4.1.1).
• Activate the service function via the “Test position fans” menu item in the options menu.
• Open the tension locks at the rear of the device and remove the cover.
• Visually check that the blades of all position fans rotate.
• Exit the service function after the visual inspection has been completed. Then reattach the cover to the lower part of thehousing and close the tension locks at the rear of the device.

6Service Manual SAHARA 4

When closing the housing, make sure that no cables are caught or have gone loose during the test.

4.1.5

Locking the options menu

• Switch on the device and activate the service functions (see sec. 4.1.1).
• Select the menu item “Lock options menu” in the options menu.
• Set the selection window to “ON” and confirm with the key.

To unlock the options menu in standby select the key
and enter the numerical code “4711” orvia a barcode reader.
read the master barcode

4.2

System update

The device can be updated by installing new software.
• Backup all data records from the internal memory of the device on an external memory medium.
• Switch off device and remove all connected USB sticks.
• Insert the USB stick with the new software into one of the USB slots of the device and switch device on.
The software update is read from the USB stick after confirmation and saved in the memory of the device.
• Remove the USB stick from the USB slot.

The current version of the software can be called up in the options menu under the “System information”
menu item.

5Repair
When ordering spare parts, always indicate the serial number of the device!

5.1

List of spare parts

5.1.1

Assemblies

Product

Order no.

Pcs. / SU

S4 Collection tray

97.8680.401

1

S4 Positioning frame 4X1

97.8680.402

1

S4 Warming plate 4x1

97.8680.490

1

USB stick

97.8700.445

1

5.1.2

Single components

7Service Manual SAHARA 4Product

Order no.

S4 housing hood

97.8680.500

Housing cover1

S4 acrylic glass flap, lacquered

97.8680.501

Housing cover1

S4 magnet for flap 15/3

97.8680.502

Housing cover

1

S4 Fuse 10AHT

97.8680.515

S4 radial fan angular 24V DC

97.8680.600

Position fan

1

S4 radial fan straight 24V DC

97.8680.601

Position fan

1

S4 cross flow fan 24V DC

97.8680.602

Fan heater1

S4 fan LED platine

97.8680.605

Fan heater

1

S4 heating register97.8680.610

Fan heater

1

S4 thermopile sensor

97.8680.620

Infrared sensor

1

5.2

AssemblyPcs. / SU2

Open and close the housing• Switch off the device and disconnect it from the power supply by removing the mains cable.
• Open the turnbuckle at the rear of the housing and carefully lift off the housing cover.
To re-assemble, follow the instructions above in reverse order.

When closing the housing, make sure that no cables are caught or have gone loose during the repair.

5.3

Replacing the fuses

The fuse holder is located in the mains switch insert on the rear of the device. To replace the fuses, proceed as follows:• Disconnect the device from the power supply by removing the mains cable.
• Carefully lever the mains switch insert out of the mains connection housing using a suitable flatblade screwdriver.
• Remove the old fuses from the fuse holder of the mains switch insert.
• Insert the new fuses into the fuse holder of the mains switch insert.
• Reinstall the mains switch insert in the mains connection housing.
• Connect the device to the power supply via the mains cable.

6

Technical information

6.1

Technical data

Dimensions:
Weight:Nominal voltage:
Power supply frequency:
Max. power consumption:
Protection class:
Operating mode:
Temperature adjustment range:
Temperature control accuracy:
Accuracy of infrared sensor:
Max. load:
Fuse characteristics:
Connections:

8W × H × D: 574 mm x 348 mm x 554 mm
27,3 kg
100 – 240 V AC
50 – 60 Hz
1000 W
I
Continuous operation
37 °C to 42 °C-1,5 °C / +2,5 °C± 3 % at a blood product temperature of 37 °C
4 blood products , each weighing up to 400 g
2 x T 10,0 A H 250 V, 20 x 5 mm acc. to IEC / EN 60127-2
2 x USB, 1 x LAN*

Service Manual SAHARA 4Ambient operating conditions:Ambient conditions for storage
and transport:
Expected service life:+10 °C to +30 °C
30 % to 75 % rel. humidity
790 hPa to 1060 hPa
max. 2000 m altitude-20 °C to +50 °C
500 hPa to 1060 hPa
10 years (in normal use and provided that the required regular inspections
and maintenance were carried out)

*is not supported at this time

6.2

EMC advice

EMC-emitted interference

Classification

HF emission according to CISPR11

Group 1, class B

Emission of harmonics according toIEC 61000-3-2Class A

Voltage fluctuations and flicker according toIEC 61000-3-3

No classification

EMC interference resistance

Test level

Electrostatic discharge (ESD) according toIEC 61000-4-2± 8 kV contact discharge± 15 kV air discharge

Quick transient electric disturbances /bursts according to IEC 61000-4-4± 2 kV with 100 kHz repetition frequency for power cables± 1 kV with 100 kHz repetition frequency for input and output wires

Surge voltages / surges according toIEC 61000-4-5± 1 kV voltage between external conductor and external conductor± 2 kV voltage between external conductor and earth

Voltage drops, short interruptions andfluctuations of the supply voltage according
to IEC 61000-4-11

0 % UT; ½ period at 0, 45, 90, 135, 180, 225, 270 and 315 degree
0 % UT; 1 period at 0 degree
70 % UT; 25 periods
0 % UT; 5 seconds

Magnetic field at supply frequency according
to IEC 61000-4-8

n.a. (the device does not contain magnetically sensitive components)

Conducted HF-disturbances according toIEC 61000-4-6

3 V between 0.15 MHz and 80 MHz; 80 % amplitude modulation at 1 kHz
6 V in ISM and amateur radio bands between 0.15 MHz and 80 MHz;
80 % amplitude modulation at 1 kHz

Radiated HF-disturbances according toIEC 61000-4-3

10 V/m between 80 MHz and 2.7 GHz; 80 % amplitude modulation
at 1 kHzRadiated proximity fields from RF wirelesscommunications equipment according toIEC 61000-4-3

27 V/m 385 MHz pulse modulation 18 Hz
27 V/m 450 MHz frequency modulation ± 5 kHz Hub, 1 kHz Sinus
9 V/m 710 MHz, 745 MHz, 780 MHz pulse modulation 217 Hz
28 V/m 810 MHz, 870 MHz, 930 MHz, pulse modulation 18 Hz
28 V/m 1.72 GHz, 1.845 GHz, 1.97 GHz, pulse modulation 217 Hz
28 V/m 2.45 GHz, pulse modulation 217 Hz
9 V/m 5.24 GHz, 5.50 GHz, 5.785 GHz, pulse modulation 217 Hz

6.3

Circuit board assembly and circuit diagrams

If circuit board assembly and circuit diagrams are required for a repair, these can be provided on request.

6.4

Error messages

By means of the following table errors indicated on the display during the system test can be remedied. If more than one
measure appears to be suitable in remedying a particular error, each measure must be implemented one after another.
Should none of the listed measures eliminate the error or should an error code appear which is not listed below, pleasecontact the manufacturer. In this case, please indicate the serial number, the version number of the operating system aswell as an error description.

9Service Manual SAHARA 4Error code

Cause

ActionOpen cover

Opening of the cover flap was notrecognised

1. Check whether the disc magnet has detachedfrom the cover flap and is stuck to the lower partof the housing.
2. Affix the disc magnet to the cover flap.

Close cover

Closing of the cover flap was notrecognised

1. Check whether the disc magnet is on
the cover flap.
2. Affix new disc magnet to the cover flap.

Warming plate defectWarming plate does not heat

1. Open cover flap and check that the plug tothe warming plate is fully inserted.
2. Exchange warming plate.

init 1.x

System driver could not be loaded

Contact the manufacturer.

init 2.1

Communication temperaturemonitoring sensor, fan heater

Remove the housing cover and check that theribbon cable to the fan heater is fully inserted.

init 2.2

Communication temperaturemonitoring sensor, warming plate,heating circuit No. 1

1. Open cover flap and check that the plug tothe warming plate is fully inserted.
2. Exchange warming plate.

init 2.3

Communication temperaturemonitoring sensor, warming plate,heating circuit No. 2

1. Open cover flap and check that the plug tothe warming plate is fully inserted.
2. Exchange warming plate.

init 2.4

Communication temperaturemonitoring sensor, warming plate,heating circuit No. 3

1. Open cover flap and check that the plug tothe warming plate is fully inserted.
2. Exchange warming plate.

init 2.5

Communication motor driverContact the manufacturer.

init 2.6

Communication IR sensor

Remove the housing cover and check that theinfrared sensor plug is fully inserted.

init 2.7

Communication touch screen

Contact the manufacturer.

init 2.8

Communication warming platecontroller

1. Open cover flap and check that the plug tothe warming plate is fully inserted.
2. Exchange warming plate.

init 2.9

Communication ambient air controller

Remove the housing coverand check that theribbon cable to the fan heater is fully inserted.

init 2.10

Warming plate not connected

1. Open cover flap and check that the plug tothe warming plate is fully inserted.
2. Exchange warming plate.

init 2.12

Absence of supply voltage

Contact the manufacturer.

init 2.13

Communication I2c piezo – light

Contact the manufacturer.

init 2.14

Agitator mechanism defectContact the manufacturer.

init 2.15

Fan heater not connected

1. Remove the housing cover and check that theribbon cable to the fan heater is fully inserted.
2. Exchange fan heater.

init 2.16

Fan in the fan heater does not rotate

1. Remove the housing cover and check that theribbon cable to the fan heater is fully inserted.
2. Exchange fan heater.

init 2.17

Fan in the fan heater always rotates

1. Remove the housing cover and check that theribbon cable to the fan heater is fully inserted.
2. Exchange fan heater.

10Service Manual SAHARA 4
Error code

Cause

Actioninit 2.18

Communication temperaturemonitoring sensor, warming plate,heating circuit No. 4

1. Open cover flap and check that the plug tothe warming plate is fully inserted.
2. Exchange warming plate.

init 3.1

Target temperature cannot be readContact the manufacturer.

init 3.2

Parameters for locking the options
menu cannot be readContact the manufacturer.

Init 3.3

Data management parameters
cannot be readContact the manufacturer.

init 3.4

Controller parameters for fan
heater cannot be readContact the manufacturer.

init 3.5

Controller parameters for warming
plate cannot be readContact the manufacturer.

init 3.6

Error memory cannot be readContact the manufacturer.

init 3.7

Serial number cannot be readContact the manufacturer.

init 3.9

No access to the SD card possible

Reinsert the SD card or replace the defective
SD card with a new one.

init 3.10

Volume parameters cannot be readContact the manufacturer.

init 3.11

Production parameters cannot be readContact the manufacturer.

init 3.12

Touch screen parameters cannot
be readContact the manufacturer.

init 4.2

Controller cannot interrupt thesupply voltage

Contact the manufacturer.

init 4.3

Watchdog controller cannot interrupt
the supply voltage

Contact the manufacturer.

7Accessories

ArticleArticle no.

Thermometer block for fixation of clinical thermometers97.8710.543

8Appendix• Test reports of outgoing inspections• Check list for preventive inspection• Decontamination certificate

11Service Manual SAHARA 49

Check list for preventive inspection

Hints• Observe the indications in the Service Manual and Instructions for use• Only use calibrated test equipment

Test itemType

Order no.

SAHARA 4

97.8720.500

Serial no.

Tests
Visual examination
Every 24 months

Electrical safety according to EN 62353

Function test /External calibration

Every 24 months

Every 12 months

Cleanness, completeness,damageGrenzwert

Measur.
value

Function test

Device inscription

PE-resistance,
permanentlyattached cord

0.300 ΩΩ

Documents

Equipment leakage
current, Class I, direct

0.5 mAmA

Position fan test

External calibration

Test equipment
Used test equipment

Test equipment name/numberDevice for checking the electrical safety
Thermometer

Result and measures
Defects have been detected that may harm patients,
users or third parties:

YESNO

Measures to take:

Adjustment

NoneRepair

Comments:

Checked by:

12Date / Signature:

Next test date:Service Manual SAHARA 4
10Decontamination certificate

1. General Information:
For all returns, the fully completed certificate of decontamination is a prerequisite for the acceptance and further processingof the used item.
Please attach the decontamination certificate clearly visible on the outside of the packaging so that it can be read without
unpacking the item. If no corresponding declaration is enclosed, we will carry out a chargeable decontamination at yourexpense.
To be completed in block capitals:
Customer Name:
Institute / institution / company:
Place:
Safety level laboratory*:
Protection level laboratory *:E-mail address:
Phone number:*Applies only to items shipped from laboratories up to and including S2 and / or L2. Shipment is prohibited from L3 / S3 onwards.

Quantity

Product description

Item No.

LOT / Serial No.

2. Confirmation:
Complaints pattern was contaminated:yesnoif so, by which substances:

biological agents (according to BioStoffV)
derived from body materials
DNA intercalating substancesRadioactive substances
Other substances, if so, which:Measures for decontamination:

I hereby certify that the items listed under point 1 are free from contamination with the substances listed under point 2.

Place, date

Signature of the authorized person

13Service Manual SAHARA 41114Notes

Service Manual SAHARA 411Notes

15

Technical modifications reserved
BA 115SARSTEDT AG & Co. KG
P.O. Box 12 20D-51582 Nümbrecht
Phone: +49 2293 305 0Fax:		 +49 2293 305 3992
export@sarstedt.com
www.sarstedt.com
16