Fresenius Medical Care T688 Series User manual

Medical Treatment Chair
T688 Series
Instruction Manual

FRESENIUS MEDICAL CARE MEDICAL TREATMENT CHAIR INSTRUCTION MANUAL - T688 Series
Page 1 of 20
IFU T688 EN V7 Apr 2021
CONTENTS
1INDICATIONS FOR USE & GENERAL SAFETY......................... 2
1.1 Indications for Use ........................................................2
1.2 General Safety..............................................................2
1.3 Side Effects...................................................................3
1.4 Contraindications ..........................................................3
1.5 Reporting Serious Incident............................................3
2OPERATING THE MEDICAL TREATMENT CHAIR.................... 4
3INSTALLING THE MEDICAL TREATMENT CHAIR.................... 6
3.1 WARNINGS AND PRECAUTIONS...............................6
3.2 BATTERY BACKUP (if fitted)........................................7
3.3 HAND CONTROLS & PROGRAMMING.......................7
3.3.1 Hand Control and optional Seat Height Foot Control....7
3.3.2 Programming Instructions.............................................9
3.3.3 Recalibration.................................................................9
4MAINTENANCE.......................................................................... 10
4.1 INSPECTION & SERVICING......................................10
4.2 CLEANING..................................................................10
4.3 FABRIC STANDARDS................................................11
4.4 TROUBLESHOOTING.........................................................11
5ARRANGING A SERVICE.......................................................... 12
6WARRANTY INFORMATION..................................................... 13
7WASTE DISPOSAL.................................................................... 13
8PHYSICAL DESCRIPTION......................................................... 14
8.1 DESCRIPTION OF DEVICE .......................................14
8.2 TECHNICAL SPECIFICATIONS.................................14
8.2.1 Dimensions, Weight & Capacity..................................14
8.2.2 Electrical Safety ..........................................................14
8.2.3 Electrical Supply..........................................................14
8.2.4 Operating Conditions ..................................................15
8.2.5 Transport & Storage Conditions..................................15
8.2.6 Electromagnetic or other interference.........................15
8.2.7 Type Label..................................................................15
8.2.8 Key to Symbols.................................................................16

FRESENIUS MEDICAL CARE MEDICAL TREATMENT CHAIR INSTRUCTION MANUAL - T688 Series
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1 INDICATIONS FOR USE & GENERAL SAFETY
1.1 Indications for Use
The Medical Treatment Chair, T688 Series chair is intended for use in medical procedures such
as the administration of renal dialysis to, and collecting blood from, patients in hospital
departments, under the supervision of trained medical staff. The Medical Treatment Chair is also
intended for use in day surgery. The T688 Series chair is designed so that the occupant is
accommodated in a seated position with the hips moved back so that the occupant’s back is
against the back rest and the legs outstretched and supported by the seat and leg rests. The
chair is designed in such a way that no special training nor competence is needed for operating it.
The T688 Series chair is also used to position patients for easy access by healthcare
professionals.
The T688 Series chair is intended to be used by patients with a weight not exceeding 200 kg (440
lbs).
1.2 General Safety
The T688 Series chair shall only be used indoors on flat surfaces under the supervision of
a medical staff
The chair should never be used in a manner for which it was not intended.
The chair is designed so that the occupant will be seated in a typical seated position - hips moved
back so that the occupant’s spine is against the backrest, with legs outstretched and supported
by the seat and leg rest.
The chair is fitted with castors, which are specifically used to aid cleaning and/or positioning of
the chair within the room. The T688 Series chair shall not be used to transport patients or
any other items. Ensure that the backrest is fully elevated before moving the chair.
For models fitted with dual hand controls: the programmable unit (Nurse’s Hand Control) is for the
use of the staff members only, and the dual recline unit (Patient’s Hand Control), where fitted, is
to be used by the patient. This ensures that the chair is not raised or lowered, by the
occupant. A staff member should ensure the area surrounding the chair is free from
obstruction before adjusting it. The Nurse’s Hand Control should be kept out of reach of
the patient at the rear of the chair.
It is the staff member's responsibility to ensure that prior to operating the chair, the surrounding
walls or equipment will not come into contact with nor obstruct the free movement of the chair.
It is the staff members' responsibility to ensure the patient is briefed on the safe operation
of the chair. If the staff member believes the patient cannot safely operate the chair, the
staff member should remove the hand control from the patient’s reach.
In an emergency, the chair can be lowered to the Trendelenburg position where CPR may be
performed. It is the staff members' responsibility to ensure that the chair is in the correct position
for CPR and that the resuscitation method used is in line with hospital policy. In addition, staff
should ensure that the chair is adequate for those resuscitation methods, in line with hospital
policy. Do not sit on the backrest, arms, or the leg rest of the chair.
The upholstery is applied parts. The upholstery has no electrical connection to other parts of the
chairs, and is made of non-conducting material.
In general, no responsibility or liability can be accepted by the manufacturer for failure to adhere
to the guidelines and instructions contained in this manual.

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1.3 Side Effects
None
1.4 Contraindications
There is no absolute contraindication for medical treatment chairs. But limitation of use in patients
with history of:
•Allergy to covering material of chairs
•Pressure sores
1.5 Reporting Serious Incident
Any serious incident that has occurred in relation to this medical device shall be reported to the
manufacturer and local health authority in accordance with the local regulations.
Within the EU the user must report any serious incident that has occurred in relation to the device
to the manufacturer according to the labelling and the competent authority of the EU member
state in which the user is established.
Refer to section 5 for Manufacturer’s contact information.

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2 OPERATING THE MEDICAL TREATMENT CHAIR
1. WARNING: To avoid risk of an electric shock, this chair must only be connected to supply mains
with protective earth.
2. When the chair is stationary and positioned to give minimum interference to staff, ensure that all
four brakes are locked by depressing the pedal on top of each castor or depressing the centre
locking pedals (if fitted) on both sides of chair.
3. The seat height may be raised to minimize bending during procedures. It is normal to cannulate
whilst in this position, ensuring the patient’s legs are elevated.
4. The swing out arm (if fitted) is released by pushing the red latch (located below the side
upholstery) forward.
5. The gas spring-assisted adjustable height armrests (if fitted) are positioned by loosening the lever
and allowing the armrest to comfortably support the patient’s arm. When in the desired position,
retighten the lever.
6. The swivel armrest (if fitted) is controlled by loosening the knob under the arm, rotating the arm to
the desired position and retightening the knob.
7. Fold out tray arm (if fitted) is accessed by opening the upper section outwards.
8. The height of the ICU arm (if fitted) can be adjusted as per instruction 5. above.
9. Arms maybe swung out or lowered flat (depending on style) to seat level to facilitate side transfer
of patient. Raise or lower the seat height to prevent unnecessary bending or lifting by staff
members.
10. IV Pole (if fitted) can be removed or repositioned by loosening the knob at the lower end of the
mounting bracket and retightening the knob.
11. Lift up tray (if fitted) can be raised by lifting the tray up until it locks into place. To close the lift up
tray, lift up the latch under the tray and lower the tray.
12. Over chair tray (if fitted) can be swiveled to the desired position by loosening the knob at the
lower end of the mounting bracket, swiveling the tray to the desired the position and then
retightening the knob.
13. When the optional patient hand control is fitted, controls of the seat/footrest and backrest
positions are available to the patient. Allow the patient to position themselves using the 4 buttons
to achieve maximum personal comfort, and to regularly alter this position.
14. For safety, only nursing staff should operate the HI/LO function.
The chair is supplied with the following pre-set memory positions:
15. In an EMERGENCY, press memory position #1 and hold and the backrest and leg rest will go to
their flattest position and the chair will lower until the backrest is supported by the rear support bar.
CPR may be performed in this position.
NOTE: It is not intended that these instructions override any Hospital instructions for emergency
treatment.

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16. To allow the patient to rise from the chair, lower the chair and return it to the upright position. (press
and hold memory position #2 until in position)
17. Memory position #3 will be pre-set to a position suitable for renal dialysis, blood collection or similar
procedures, for ICU and emergency wards, or to a position suitable for side transfer. Press and hold
memory position button #3 until in position.
18. To reprogram the pre-set positions see Section: 3.3.2
19. One Touch Memory Position function (if fitted) allows the chair to move automatically to a
memory position without holding the memory position buttons. To operate, briefly press the required
memory position button (#1, #2, or #3) on the nurse hand control.
NOTE: For emergency stop, press any button on either the nurse hand control or the patient hand
control (if fitted).
20. Seat Height Foot HI/Lo Control (if fitted) can be used raise or lower chair height.
21. USB charger (if fitted) can be used to charge a USB device, such as a mobile phone, a music player
or a camera. Maximum output of the charger is 4 watt.
NOTE: It may not charge all USB devices depending on the power input requirement of the USB
devices.
NOTE: To use the USB charger, ensure the chair is plugged in the mains power. The USB charger
will NOT work when the chair is powered by backup battery.
22. Ensure procedural equipment is set up to avoid tubing and cords becoming trapped in the moving
parts of the chair (e.g. arm rests). DISCONNECT procedural equipment prior to removing patient
from chair.
23. The power cord should always be left in the power supply socket and switched on. The backup
batteries (if fitted) will recharge automatically and slow to trickle charge when full.
24. The chair can be disconnected from the mains power by switching off the mains power supply
socket or unplugging the power cord from the mains power.

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3 INSTALLING THE MEDICAL TREATMENT CHAIR
Note: Transport damage, if any, should be inspected and reported immediately after delivery. No
claims for transport damage will be accepted 7 days after the delivery date.
At all times, when positioning the chair, care should be taken to ensure that no part of the chair
comes into contact with any equipment or structures, particularly during emergency procedures.
It is important to ensure that any staff members who are operating the chair have been trained by
the manufacturer or its agent prior to use.
The installation procedure is as follows:
1. Position the chair. Do not position the chair so that it is difficult to disconnect the chair from
the mains power.
2. Remove any temporary ties or packaging.
3. Connect the power cord to an approved power supply for the relevant country as indicated
by the label.
WARNING: To avoid risk of an electric shock, this chair must only be connected to supply
mains with protective earth.
4. Test the chair by taking it through its complete range of movements.
The power cord should be connected to the power supply and the power point should be
switched on. (Refer to section 3.2)The backup batteries (if fitted) will recharge automatically and
slow to trickle charge when full.
It is important to charge the backup battery for a minimum of 24 hours before use the chair.
3.1 WARNINGS AND PRECAUTIONS
The following table shows potential hazards that have been identified and the steps that should
be taken to avoid them:
IDENTIFIED
HAZARD
CAUSE
PREVENTATIVE ACTION
Cushion support
frame wear and
tear
Operator handling
error or misuse.
Incorrect cleaning of
upholstery
•Service regularly.
•Train all operators.
•Check chairs regularly for upholstery cuts, cracks
or damage. Inspect the frame for deformities or
cracks
Chair stops
responding to
controls
Power cord damage,
motor stops working,
controls stop
working.
•Don’t push chair over power cords.
•Don’t place stress on power cords.
•Only use approved parts and motors.
•Use only as directed in this instruction manual.
Contamination on
upholstery
Chair not cleaned
effectively between
treatments, damaged
upholstery.
•Take care not to damage upholstery.
•Damaged upholstery should be repaired or
replaced immediately.
•Clean and decontaminate chair with appropriate
agents and procedures as described in this
instruction manual. Section 4.2
Instruction manual
not read or
understood.
Staff turnover, new
staff.
•Provide training for all new staff using the chair.
•We recommend that the operation manual stays
with the chair.

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3.2 BATTERY BACKUP (if fitted)
The battery should only be used in the event of no power supply and should NOT be the main
source of power. As such, the power cord should be left in the power supply and switched on
while the chair is in use. The battery must be charged for at least 24 hours before it can be used.
The battery will automatically trickle charge until fully charged and should not be unplugged.
Refer to section 8.2.8 for battery charging indication and battery level indication.
The battery is lead acid battery. Should the battery fail to charge, please contact Fresenius Medical
Care or your local representative at the details provided in section 5. The battery is not user
replaceable. The chair must be connected to the power supply to recharge at least every 5 days.
3.3 HAND CONTROLS & PROGRAMMING
Each T688 Series chair can be supplied with two hand controls. One nurse-operated hand
control and one patient-operated hand control.
The patient’s individual hand control allows operation of the seat/footrest and backrest position,
allowing the patient to position themselves for maximum comfort, and to regularly alter this
position.
The T688 Series chair can also be supplied with an optional Seat Height Foot Control
(HI/LO).
Only nursing staff should operate the Height function. the Nurse hand control should be
kept out of reach of the patient at the rear of the chair.
For an explanation of symbols on the hand controls, see section 8.2.8.
3.3.1 Hand Control and optional Seat Height Foot Control
Patient’s Hand Control
Nurse’s Hand Control
.

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Seat Height Foot Control

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3.3.2 Programming Instructions
This can only be done using the nurse’s hand control. A maximum of three
positions may be programmed into the memory as follows:
1. Position the chair to the desired position using the up & down arrows for
the backrest, whole chair and leg rest.
2. When the chair is in the desired position, hold down the S (store) button
for five seconds until beep sounds.
3. Once the beep is sounding, select one of the numbers, 1, 2 or 3 and
press it within two seconds to store the pre-programmed position.
3.3.3 Recalibration
If there is a loss of feedback from any of the actuators, a ‘position lost’ beep will be heard from
the control box when any button is pressed.
RecalibrateT688 Series Chair as follows using the nurse’s hand control:
➢Stage 1 –Clear System Faults
Press both of the Up and Down arrow buttons of the seat height function simultaneously. If
successful a constant beeping will be heard. Hold until the beeping stops (approximately five
seconds). NOTE: Both buttons must be activated at exactly the same time. If beeping does not
start, repeat until successful.
➢Stage 2 –Initialise the System (Process 1)
Press both of the Up and Down arrow buttons for the Backrest function simultaneously and hold
until all the actuators have stopped moving. This will drive the Backrest actuator into the fully
retracted (down), the Leg Rest actuator into the fully retracted (down) position and the Height
actuator into the fully retracted (down) position. When completed the system will beep twice to
confirm.
Note: If the system does not beep twice when all of the actuators have stopped, please contact
Fresenius Medical Care or your local representative for further assistance.
If the chair does not respond to Process 1, please follow the instructions below (Process 2).
➢Stage 2 –Initialise the System (Process 2)
Press and hold the “Backrest Down” button. Hold the button for one second after the actuator has
stopped moving.
Press the “Height Down” button. Hold the button for one second after the actuator has stopped
moving.
Press the “Leg Rest Down” button. Hold the button for one second after the actuator has stopped
moving.
Note: The chair’s positions can be reprogrammed via the nurse hand control. Refer to
instructions in section 3.3.2.

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4 MAINTENANCE
4.1 INSPECTION & SERVICING
WARNING: No modification of this equipment is allowed. No part of the chair is user-
serviceable. All servicing must be carried out by Fresenius Medical Care or authorised
agent.
Routine servicing, at least annually, is highly recommended in order to maintain the safe
operation of the chair. Refer to the Service Manual for recommended annual preventive
maintenance.
A regular visual inspection at least once a month is recommended to ensure that each chair
operates safely and as intended by the manufacturer.
Areas to be checked include:
•Motors operate smoothly through cycle
•No broken welds and no wabbly parts
•Upholstery not worn or torn
The battery cannot be changed by the user. The battery is to be replaced after 4 years at the
latest. Perhaps earlier, dependent on the pattern of use. Frequent and high-powered discharges
reduce the battery life. For an optimum lifetime the product must be connected to the mains
voltage as often as possible. If change of battery is required, please contact Fresenius Medical
Care or authorised agent. No liability can be accepted by the manufacturer if the chair is operated
whilst faulty and further damage occurs.
4.2 CLEANING
Cleaning should conform to the standards set by the hospital. All materials used in the
manufacture of the chairs have been found to be suitable to be cleaned with standard hospital
cleaning products, however to ensure suitability, a test should be carried out on an inconspicuous
piece of material, or a sample provided by the manufacturer.
The following should be used as a guideline only and no claims will be accepted for
damage as a result of following these guidelines:
RECOMMENDED CLEANING PROCEDURE FOR MEDICAL TREATMENT CHAIRS
The following recommended procedure should only be used if it generally conforms to
Infection Control guidelines of the hospital.
Step 1
Bodily fluids may carry infectious material. Ensure that
protective garments and gloves are worn prior to
commencing the cleaning operation.
Step 2
If required, remove the seat and backrest by gently
pulling or lifting them off their clips.
Step 3
Remove as much of the spilt liquid as possible using a
sponge type material with a dabbing motion.
Step 4
Make up a diluted bleach solution (e.g. Miltons) of 1
part bleach to 30 parts water.
Step 5
First test the solution on a small area of the vinyl.
Then, pour onto spill area and wipe with a mopping
action.
Step 6
Use a general purpose detergent cleaner with warm
water on a cloth for a final clean
Step 7
Replace the seat and back rest by carefully clipping
them back onto the frame.
CAUTIONARY NOTES ABOUT BLEACH:

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1. Never allow bleach to mix with ammonia. If you have recently used ammonia on or
near the area you are about to clean, do not use bleach.
2. Always take care when working with bleach and keep it away from children. Bleach is not
only poisonous and corrosive, but it can damage clothes and materials.
3. Never use undiluted bleach
4.3 FABRIC STANDARDS
Unless otherwise stated, standard upholstery fabrics used on these chairs conform to the
following Australian Standards:
- Flame Retardant tested to AS1530.3*
- UV Stable - tested to ISO 105-B02 Colour fastness to artificial light: Xenon arc fading
lamp test*
*NOTE: This is for Fresenius Medical Care standard supply fabric. Customer specific fabric may
not meet these standards.
4.4 TROUBLESHOOTING
In the event the chair fails to operate correctly please take the following steps prior to
contacting Fresenius Medical Care or its authorised agent.
1. Check the mains power point is active.
2. Check that the power cord is not damaged or worn. Check that the chair is connected into the
mains power outlet and switched on correctly, as indicated by the green indicator light on the
nurse’s hand control.
3. Ensure that the batteries have been on charge for 24 hours minimum. This should occur at
least every 5 days.
4. Ensure there are no damage or cuts in the cables to the hand control or actuator cables.
5. Determine functions are not operating as follows:
Problem / Failure
Action / Solution
The leg rest motor (vertically mounted under the
seat)
Depress the hand control button for the leg rest and
the leg rest should raise or lower.
The backrest motor (mounted behind the backrest)
Depress the hand control button for the backrest
and the back should raise or lower.
The lift column (mounted on top of the base)
Depress the hand control button for the chair height
control and the chair should raise or lower.
If the chair does not correctly respond to hand
controls
The chair requires recalibration (please refer to
section 3.3.3).
6. Take note of the serial number ( ) of the chair. This can be found on the Type Label
attached to the chair. An example of the Type Label is in section 8.2.7.
7. If you are unsure about any aspect of the above steps, please contact Fresenius Medical
Care Seating at the contact details provided in Section 5 of this manual.

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5 ARRANGING A SERVICE
In the event that the chair fails to operate correctly or to arrange a service please contact your
local representative or Fresenius Medical Care Office.
Note: Please quote the chair serial number ( ) which can be found on the Type Label
attached to the chair. An example of the Type Label is in section 8.2.7.
CONTACT INFORMATION
https://fmc-seating.com
MANUFACTURER
FRESENIUS MEDICAL CARE SEATING (AUSTRALIA) PTY. LTD.
786 Stud Road
Scoresby
VICTORIA 3179
AUSTRALIA
[email protected]
SERVICE TEL: [phone]
SALES TEL: [phone]
FAX: [phone]
ABN: 84 004 658 495
AGENT / DISTRIBUTOR:
<agent/distributor insert stamp here>

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6 WARRANTY INFORMATION
The following information outlines the warranty and Conditions of Sale for the Medical Treatment
Chair
1. Fresenius Medical Care will repair or replace, at its discretion, any component or assembly,
which exhibits failure or undue wear when subjected to normal use, and/or used in the manner
which was intended at the time of sale.
2. The warranty is limited to the original purchaser at the original delivery address.
3. When sold by a reseller, this warranty covers costs at the premises of the reseller, and if
required in approved situations, transport costs from the reseller to and from Melbourne, or to
a third party specified by Fresenius Medical Care.
4. Use of non-recommended cleaning agents may void the warranty.
5. The T688 Series Medical Treatment Chair is covered by a 12 month warranty.
6. T688 Series Medical Treatment Chairs are not covered by warranty if used outdoors.
7. The use of unauthorised labour will void the warranty. Contact Fresenius Medical Care for
approval prior to commencing work.
8. If you are unsure about any aspect of this warranty, please contact Fresenius Medical
Care at the number given in Section 5 of this manual.
If you need to arrange a service, please see the instructions in section 5 of this manual.
7 WASTE DISPOSAL
Before disposal, the chair must be sufficiently disinfected by the responsible organisation and is
to be rendered unusable, e.g. cutting the cables, and it must not be disposed of as unsorted
municipal waste in accordance with local regulations.
The chair may be disposed of, possibly by dividing them into the following waste groups for
recycling or combustion. The respective local regulations on recycling or safe destruction of these
material groups should be observed.
Chair component group
Recycling group
Metal frame
Scrap metal
Vinyl covers/ upholsteries
Plastic
Motors, electrical boards
Misc. electrical scrap
Battery (contains lead)
Battery

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8 PHYSICAL DESCRIPTION
8.1 DESCRIPTION OF DEVICE
T688 Series Medical Treatment Chair consists of:
•Electrically powered chair with
- three (3) actuators;
- one (1) or two (2) hand controls (one nurse control & one optional patient
control)
- pivoting or adjustable armrests
- adjustable head rest
- 4 locking castors or central locking castors
- leg rest
- removable upholstery
8.2 TECHNICAL SPECIFICATIONS
8.2.1 Dimensions, Weight & Capacity
T688 Series chair
Dimensions
(depending on options)
Height: 1300 cm
Width: 100 cm
Length: 99 cm
Weight
(depending on options)
105kg
Capacity
200 kg
8.2.2 Electrical Safety
Classification according to IEC 60601-1:2012
Degree of protection against electric shock Type B
CO7 (Control Box) Specifications
Degree of protection against ingress of solids/liquids IPX6
Mains voltage 100-240V~ 50/60 Hz
Battery Capacity 1.3 Ah, 24 VDC
Hand Control Specifications
Degree of protection against ingress of solids/liquids IPX4 (Nurse Hand Control)
Degree of protection against ingress of solids/liquids IPX4 or IPX6 (Patient Hand
Control)
Actuator Specifications
Degree of protection against ingress of solids/liquids IPX4 or IPX6
8.2.3 Electrical Supply
Input voltage 100-240V~
Nominal frequency 60 Hz or 50 Hz
Battery type Lead Acid battery
Capacity 1.3 Ah
Output voltage 24 VDC

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8.2.4 Operating Conditions
Temperature range 5ºC –40ºC (41ºF - 104ºF)
Relative humidity 20% –90%
8.2.5 Transport & Storage Conditions
Temperature range 5ºC –40ºC (41ºF - 104ºF)
Relative humidity 20% –90%
8.2.6 Electromagnetic or other interference
Switch off devices which can cause electromagnetic interference.
8.2.7 Type Label

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8.2.8 Key to Symbols
Article Number/Catalog
Number
Date of manufacture
Serial Number
CE mark
Manufacturer
For indoor use only
Caution, warning
Storage and operating
relative humidity 20% - 90 %
authorized
representative in
the European
Community
Medical Device
Degree of protection
against electrical shock:
Type B
Storage and operating
temperature 5ºC –40ºC
Consult Instruction Manual
Storage and Handling Symbols
Keep Dry
This way
up
Fragile
Handle with Care
Fragile
Handle with
Care
Hand Control Symbols
Memory Position 1
Memory Position 2
Memory Position 3
Stores memory position
Hand Control Indication Lights *
LED “Amber” Off and LED “Green” On indicates Mains is on and Battery is fully charged
LED “Amber” On and LED “Green” Off indicates Battery is in normal use
LED “Amber” blinking and LED “Green” Off indicates Battery is in normal use and
requires charging
LED “Amber” ON and LED “Green” ON indicates mains is on and battery is charging
LED “Amber” Off and LED “Green” Off indicates Mains is not on and battery requires
charging. Chair will not operate.
LED “Amber” blinking and LED “Green” blinking and indicates a system error
Note: When the chair is not connected to the mains, press any button on the nurse hand control to wake up the
application and check the indication lights. Application will return to sleep condition after 2 minutes with no button
Backrest control
Seat Height
Leg Rest control

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pressed.
Seat Height Foot Control (optional) Symbol
+
Raise the Chair
-
Lower the Chair
Authorised Representative in the European
Community
Fresenius Medical Care Deutschland GmbH
Else-Kröner-Straße 1, 61352 Bad Homburg, Germany
Telephone: [phone]

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9 Guidance and manufacturer's declaration
Guidance and manufacturer's declaration -electromagnetic emission
The T688 Series chair is intended for use in the electromagnetic environment specified below. The
customer or the user of the T688 should assure that it is used in such an environment.
Emissions test
Compliance
Electromagnetic environment - guidance
RF emissions
CISPR 11
Group 1
The T688 Series chair uses RF energy only for its internal
function. Therefore, its RF emissions are very low and are
not likely to cause any Interference In nearby electronic
equipment.
RF emissions
CISPR 11
Class B
The T688 Series chair is suitable for use in all
establishments other than domestic and those directly
connected to the public low-voltage power supply network
that supplies buildings used for domestic purposes.
Harmonic
Emissions
IEC 61000-3-2
class A
Voltage
Fluctuations/
flicker emissions
IEC 61000-3-3
Complies
Guidance and MANUFACTURER’S declaration – electromagnetic IMMUNITY
Guidance and manufacturer’s declaration –electromagnetic immunity
The T688 Series chair is intended for use in the electromagnetic environment specified below. The
customer or the user of the T688 Series chair should assure that it is used in such an environment.
IMMUNITY test
IEC 60601
test level
Compliance level
Electromagnetic environment
–
guidance
Electrostatic
discharge (ESD)
IEC 61000-4-2
± 6 kV contact
± 8 kV air
± 6 kV contact
± 8 kV air
Floors should be wood, concrete
or ceramic tile. If floors are
covered with synthetic material,
the relative humidity should be
at least 30 %.
Electrical fast
transient/burst
IEC 61000-4-4
± 2 kV for power
supply lines
± 1 kV for
input/output
lines
± 2 kV for power
supply lines
± 1 kV for
input/output
Lines not applicable
Mains power quality should be
that of a typical commercial or
hospital environment.
Surge
IEC 61000-4-5
± 1 kV line(s) to
line(s)
± 2 kV line(s) to
earth
± 1 kV line(s) to
line(s)
± 2 kV line(s) to
earth
Mains power quality should be
that of a typical commercial or
hospital environment.
Voltage dips, short
interruptions and
voltage variations
on power supply
input lines
IEC 61000-4-11
<5 % UT
(>95 % dip in UT)
for 0,5 cycle
40 % UT
(60 % dip in UT)
for 5 cycles
70 % UT
(30 % dip in UT)
for 25 cycles
<5 % UT
(>95 %
<5 % UT
(>95 % dip in UT)
for 0,5 cycle
40 % UT
(60 % dip in UT)
for 5 cycles
70 % UT
(30 % dip in UT)
for 25 cycles
<5 % UT
(>95 %
Mains power quality should be
that of a typical commercial or
hospital environment. If the user
of the T688 Series chair requires
continued operation during
power mains interruptions, it is
recommended that the T688
Series chair be powered from an
uninterruptible power supply or a
battery.
Power frequency
(50/60 Hz)
magnetic field
IEC 61000-4-8
3 A/m
3 A/m
Power frequency magnetic fields
should be at levels characteristic
of a typical location in a typical
commercial or hospital
environment.
NOTE UT is the a.c. mains voltage prior to application of the test level.

FRESENIUS MEDICAL CARE MEDICAL TREATMENT CHAIR INSTRUCTION MANUAL - T688 Series
Page 19 of 20
IFU T688 EN V7 Apr 2021
Guidance and MANUFACTURER’S declaration – electromagnetic IMMUNITY
Guidance and manufacturer’s declaration –electromagnetic immunity
The T688 Series chair is intended for use in the electromagnetic environment specified below. The
customer or the user of the T688 Series chair should assure that it is used in such an environment.
IMMUNITY test
IEC 60601 TEST
LEVEL
Compliance
level
Electromagnetic environment –
guidance
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
3 Vrms
150 kHz to 80
MHz
3 V/m
80 MHz to 2,5
GHz
3Vms
3 V/m
Portable and mobile RF communications
equipment should be used no closer to
any part of the T688 Series chair,
including cables, than the recommended
separation distance calculated from the
equation applicable to the frequency of
the transmitter.
Recommended separation distance
where P is the maximum output power
rating of the transmitter in watts (W)
according to the transmitter
manufacturer and d is the recommended
separation distance in metres (m).
Field strengths from fixed RF
transmitters, as determined by an
electromagnetic site survey,a should be
less than the compliance level in each
frequency range.b
Interference may occur in the vicinity of
equipment
marked with the following symbol:
NOTE 1 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption
and reflection from structures, objects and people.
aField strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones
and land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast cannot be
predicted theoretically with accuracy. To assess the electromagnetic environment due to fixed RF
transmitters, an electromagnetic site survey should be considered. If the measured field strength in the
location in which the [ME EQUIPMENT or ME SYSTEM] is used exceeds the applicable RF compliance
level above, the [ME EQUIPMENT or ME SYSTEM] should be observed to verify normal operation. If
abnormal performance is observed, additional measures may be necessary, such as re-orienting or
relocating the [ME EQUIPMENT or ME SYSTEM].
bOver the frequency range 150 kHz to 80 MHz, field strengths should be less than [V1] V/m.