Charder MS7800 User manual

1
USER MANUAL
MS7800
Patient Transfer Scale
Please keep the instruction manual at hand all the time for future reference.

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Explanation of Graphic Symbols on Label/Packaging
Caution, consult
accompanying documents
before use
Authorized
representative in the
European Community
Manufacturer of medical
device
Indicates that device
conforms to
International
Organization of Legal
Metrology (Class III)
requirements
Manufacturing year of
medical device
Indicates that device
conforms to
2014/31/EU Non
Automatic Weighing
Instruments Directive.
Numerals change
according to year of
manufacture. (ex: "19"
for 2019)
Separate collection for waste
of electrical and electronic
equipment, in accordance
with Directive 2002/96/EC
Indicates that device
conforms to 93/42/EEC
as amended by
2007/47/EC Medical
Device Directive. Four
digit number refers to
Notified Body.
Device catalogue number
Indicates that device
conforms to
2014/31/EU Non
Automatic Weighing
Instruments Directive.
Four digit number refers
to Notified Body.
Manufacturer's batch or lot
number
Indicates that device is
a medical device
Serial number
Carefully read user
manual before
installation and usage,
and follow instructions
for use.
Unique Device Identifier
Medical electrical
equipment with Type B
applied part

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Copyright Notice
Charder Electronic Co., Ltd.
No.103, Guozhong Rd., Dali Dist., Taichung City 41262 Taiwan
Tel: [phone]
Fax: [phone]
Website: www.chardermedical.com E-mail: [e-mail]
Copyright© Charder Electronic Co., Ltd. All rights reserved.
This user manual is protected by international copyright law. All content is
licensed, and usage is subject to written authorization from Charder
Electronic Co., Ltd. (hereinafter Charder) Charder is not liable for any
damage caused by a failure to adhere to requirements stated in this
manual. Charder reserves the right to correct misprints in the manual
without prior notice, and modify the exterior of the device for quality
purposes without customer consent.
Charder Electronic Co., Ltd.
No. 103, Guozhong Rd., Dali Dist.,
Taichung City, 412 Taiwan

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CONTENTS
I. Safety Notes .......................................................................... 5
A. General Information.............................................................5
B. EMC Guidance and Manufacturer's Declaration.........................9
II. Preparing to use Device ......................................................13
A. Charging Device ................................................................13
B. Standard Procedure............................................................13
III. Indicator............................................................................16
A. Key Functions....................................................................16
B. Display layout....................................................................16
IV. Using Device.......................................................................17
A. Basic Operation .................................................................17
B. Hold.................................................................................17
V. Device Setup ........................................................................18
VI. Troubleshooting..................................................................19
VII. Product Specifications.......................................................22
VIII. Declaration of Conformity................................................24

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I. Safety Notes
A. General Information
Thank you for choosing this Charder Medical device. It is designed to be
easy and straightforward to operate, but if you encounter any problems
not addressed in this manual, please contact your local Charder service
partner.
Before beginning operation of the device, please read this user manual
carefully, and keep it in a safe place for reference. It contains important
instructions regarding installation, proper usage, and maintenance.
Intended Use
This device is intended to measure the weight of subjects with limited
mobility, for professional diagnosis of weight-related issues.
General Handling
Device should be placed on stable, flat, solid, non-slippery surface.
Usage on soft surfaces (ex: carpet) may result in inaccurate results.
Ensure all parts are properly locked and tightened before operating
the device.
Safety Instructions
Before putting device into use, please read this user manual carefully. It
contains important instructions for installation, usage, and maintenance
of device.
The manufacturer shall not be liable for damages caused by failure to
heed the following instructions:
Batteries should be kept away from children. If swallowed, promptly
seek medical assistance.
Expected service life: 5 years.
Always comply with appropriate regulations when using electrical
components under increased safety requirements.
Improper installation will render the warranty null and void.
Ensure voltage marked on power supply matches mains power
supply.
The device is intended for indoor use only.
Observe permissible ambient temperatures for use

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Device meets requirements for electromagnetic compatibility. Do not
exceed the maximum values specified in the applicable standards.
Environmental
All batteries contain toxic compounds; batteries should be disposed
of via designated competent organizations. Batteries should not be
incinerated.
The optimum operating temperature for the device is 5℃to 35℃;
although it will operate at higher and lower temperatures, battery
life will adversely be effected.
Cleaning
Device surface should be cleaned using alcohol-based wipes.
Corrosive cleansing liquids should not be used. Pressure-washers
should not be used.
Do not use large amounts of water when cleaning the device, as it
may cause damage to the internal electronics.
Always disconnect device from mains power before cleaning.
Maintenance
Please contact your local Charder distributor for regular maintenance
and calibration.
Device does not require routine maintenance. However, regular
checking of accuracy is recommended; frequency to be determined
by level of use and state of device. If results are inaccurate, please
contact local distributor.
Warranty/Liability
If Charder is responsible for a fault or defect present upon receipt of
the unit, Charder shall either repair the fault, or supply a
replacement unit. Should the repairs or replacement delivery fail,
statutory provisions shall be valid. The period of warranty shall be
two years, beginning on the date of purchase. Please retain your
receipt as proof of purchase.
No responsibility shall be accepted for damage caused through any
of the following reasons: unsuitable or improper storage or use,
incorrect installation or commissioning by the owner or third parties,
natural wear and tear, changes or modifications, incorrect or
negligent handling, chemical, electrochemical, or electrical
interference, unless damage is attributable to negligence on the part
of Charder.
This device does not contain any user-maintained parts. All
maintenance, technical inspections, and repairs should be conducted

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by an authorized Charder service partner, using original Charder
accessories and spare parts. Charder is not liable for any damages
arising from improper maintenance or usage. Dismantlement of the
device will void the warranty.
Disposal
This product is not to be treated as regular household waste, but
should be taken to a designated collection points for electronics.
Further information should be provided by local waste disposal
authorities.
Warning
Only the original adapter should be used with the device. Using an
adapter other than the one provided by Charder may cause
malfunction.
Do not touch the power supply with wet hands.
Do not crimp the power cable, and avoid sharp edges.
Do not overload extension cables connected to the device.
Route cables carefully, to avoid tripping.
Keep device away from liquids.
Do not remove the plug by yanking on the cable.
Use only a correctly wired (100-240VAC) outlet, and do not use a
multiple outlet extension cable.
Do not under any circumstances dismantle or alter the device, as this
could result in electric shock or injury as well as adversely affect the
precision of measurements.
Do not place the device in direct sunlight, or in close proximity to an
intense heat source. Excessively high temperatures may damage the
internal electronics.

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Warning
Proper usage of the Patient Transfer Scale.
The device should only be used by professionals trained in proper
usage. Bed castors should be locked before usage. Distance between
beds should be no more than 10cm. At least 20cm of the device
should be on trolley and bed.
Transfer between surfaces of similar height
Inspect device for damage before use
Do not overload. Maximum capacity: 250 kg / 550 lb
Incident Reporting
Any serious incident that has occurred in relation to the device should be
reported to the manufacturer, EU representative (if device is used in EU
member state), and competent authority of user/subject's member state.

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B. EMC Guidance and Manufacturer's Declaration
Guidance and manufacturer’s declaration-electromagnetic emissions
The MS7800 Patient Transfer Scale is intended for use in the electromagnetic environment
specified below. The customer or the user of the device should assure that it is used in such
an environment.
Emission test Compliance Electromagnetic
environment-guidance
RF emissions CISPR 11
Group 1
The device 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 device is suitable for use in all
establishments, including domestic
establishments 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
Compliance

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Guidance and manufacturer’s declaration-electromagnetic immunity
The MS7800 Patient Transfer Scale is intended for use in the electromagnetic environment
specified below. The customer or the user of the device 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
±
8 kV contact
±2 kV, ± 4 kV,
± 8 kV, ± 15 kV
air
±
8 kV contact
±2 kV, ± 4 kV,
± 8 kV, ± 15 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
± 2kV for
power supply
lines
+ 1kV for
input/output
lines
+ 2kV for power
supply lines
+ 1kV for
input/output
lines
Mains power quality should be
that of a typical commercial or
hospital environment.
Surge IEC
61000-4-5 ± 1kV line(s) to
line(s)
± 2kV line(s) to
earth
+ 1kV line(s) to
line(s)
+ 2kV 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
0% UT for 0,5
cycle
0% UT for 1
cycle
70% UT(30%
dip in UT) for
25 cycles
0% UT for 5 s
0% UT for 0,5
cycle
0% UT for 1
cycle
70% UT(30%
dip in UT) for 25
cycles
0% UT for 5 s
Mains power quality should be
that of a typical commercial or
hospital environment. If the
user of the device requires
continued operation during
power mains interruptions, it is
recommended that the device
be powered from an
uninterruptible power supply or
a battery.
Power
frequency(50/60
Hz) magnetic field
IEC 61000-4-8
30 A/m
30 A/m
The device 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.

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Guidance and manufacturer’s declaration-electromagnetic immunity
The MS7800 Patient Transfer Scale is intended for use in the electromagnetic environment
specified below. The customer or the user of the device should assure that 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
6 V in ISM bands
between 0,15 MHz
and 80 MHz
80 % AM at 1 kHz
3 V/m
80MHz to 2,7 GHz
3 Vrms
150 KHz to 80
MHz
6 V in ISM
bands between
0,15 MHz and
80 MHz
80 % AM at 1
kHz
3 V/m
80MHz to 2,7
GHz
Portable and mobile RF
communications equipment
should be used no closer to any
part of the device including
cables, than the recommended
separation distance calculated
from the equation applicable to
the frequency of the
transmitter.
Recommended separation
distance:
d = 1,2 √P
d = 1,2 √P 80MHz to 800 MHz
d = 2,3 √P 800MHz to 2,5 GHz
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 surveya,
should be less than the
compliance level in each
frequency rangeb.
Interference may occur in the
vicinity of equipment marked
with the following symbol:

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NOTE1 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE2 These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reflection from structures, objects and people.
a Field 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 device is used
exceeds the applicable RF compliance level above, the device should be observed to
verify normal operation. If abnormal performance is observed, additional measures may
be necessary, such as re-orienting or relocating the device.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended separation distance between portable and mobile RF
communications equipment and the MS7800 Patient Transfer Scale
The device is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the device can help prevent
electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and the device as recommended
below, according to the maximum output power of the communications equipment.
Rated maximum
output power of
transmitter
W
Separation distance according to frequency of
transmitter m
150 kHz to 80
MHz
d =1,2√P
80 MHz to 800
MHz
d =1,2√P
800 MHz to 2,5
GHz
d =2,3√P
0,01 0,12 0,12 0,23
0,1 0,38 0,38 0,73
1 1,2 1,2 2,3
10 3,8 3,8 7,3
100 12 12 23
For transmitters rated at a maximum output power not listed above, the recommended
separation distance d in metres (m) can be estimated using the equation applicable to the
frequency of the transmitter, where p is the maximum output power rating of the
transmitter in watts (W) according to the transmitter manufacturer.
NOTE1 At 80 MHz and 800 MHz, the separation distance for the higher frequency range
applies.
NOTE2 These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reflection from structures, objects and people.

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II. Preparing to use Device
A. Charging Device
Device should be fully charged before first use. Please allow 8 hours for
full charge.
When low battery indicator on display appears, please charge battery
promptly to avoid battery damage. Charging port is located on underside
of device.
The port for the charging cable is magnetic. Clip end of cable in place, and
plug other end of cable into power mains. Device cannot be used while
charging. Do not use any form of charging cable other than the one
supplied with the device.
B. Standard Procedure
The device should be used in accordance with standard medical moving
and handling procedure. It should be used in the same way as a transfer
board, with a short period of time reserved in process to allow device to
measure subject weight.

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SAFETY RULES
1. Device should only be used by trained professionals
2. Castor wheel brakes on beds should be applied before transfer.
3. Trolley/bed frames should be touching before transfer.
4. There should be no more than 20 cm between beds. At least 20 cm of
the device should be on each bed or trolley before transfer.
5. When transferring, two surfaces should be of similar height. A tilt
exceeding 3% will affect accuracy. (indicator will display an error if tilt
exceeds 3%).
6. Do not overload. Maximum capacity: 250 kg / 550 lbs.
INSTRUCTIONS
1. Prepare slide sheet with handles and put under subject.
2. Help subject lie upon measurement platform. Conduct measurement
(see Chapter V - Using Device).

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3. After weight measurement, transfer subject and remove slide sheet.

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III. Indicator
A. Key Functions
Key
Description
Power on or power off. When device is on, press and hold
for 3 seconds to turn off.
Reset the display to 0.0kg / Zero the scale (within ±2%
of full capacity)
Determine stable weighing value - used when weight is
unstable.
Press and hold for 3 seconds to switch the weighing units
of the scale from kg to lb (CE model only)
B. Display layout
NET HOLD
Low Battery
Battery needs to be
charged
Zero
Weight has been
zeroed
Negative weight
Weight under zero
Stable
Weight is stable

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IV. Using Device
A. Basic Operation
Switch on the device using key. The device will automatically
perform self-calibration, displaying software version.
Once "0.00 kg" appears on indicator, device is ready for measurement.
Note: If "0.00 kg" does not display on indicator, press [ZERO] key to
zero the device. This function can be used for weight within ±2% of full
capacity.
Guide subject to lay upon measurement platform. After weight has
stabilized, the "stable" symbol will appear on indicator.
Note: If subject's weight exceeds scale capacity (250 kg), indicator will
display "Err" prompt due to overload.
Press and hold key for 3 seconds to power off.
B. Hold
The hold function determines average weight, designed to be used if
subject's weight will not stabilize (ex: an active child).
Note: if fluctuation is too severe, average weight determination will be
difficult and hold may not function correctly. Hold cannot be used under 2
kg.
1. Switch on the device normally. Wait for "0.00 kg" to display on screen.
2. Guide subject to lie upon measurement platform.
3. Press the [HOLD] key. "HOLD" will be displayed on the indicator.
4. After a few seconds, the average weight will be displayed on the
indicator. This weight will be locked - at this point, subject can leave
measurement platform.
5. To release the locked weight, press the [HOLD] key again to return to
the device to normal mode.
Note: Hold function can be activated before or after subject lies upon
platform. However, if subject finds it difficult to hold still, we recommend
activating Hold after subject is on platform.

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V. Device Setup
When device is switched on, press and hold key until
appears on display. Press [HOLD] 3 times to enter setup.
In device setup:
(ZERO): confirm (HOLD): toggle
Auto Power-Off: Instruct device to shut off automatically after a certain
period of time.
Auto off options: 30 min / 60 min / off
Press [HOLD] to toggle between time options, and [ZERO] to confirm
selection.
Buzzer/Beep:
When function is turned on, beeping noise will be made when buttons are
pressed..
Press [HOLD] to toggle between on/off, and [ZERO] key to confirm
selection.
Backlight On/Off: When function is turned on, indicator screen will be
backlit.
Press [HOLD] to toggle between on/auto. When "on" is selected, the
backlight will always be on. When "Auto" is selected, backlight will be
activated when there is a change in weight, or buttons are pressed.
Press [ZERO]key to confirm selection.
To confirm all setting changes, press [HOLD] key when appears
on display.

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VI. Troubleshooting
Product Defects
Charder's warranty is effective for the original purchaser of this device,
subject to the terms and conditions listed in the Warranty Program &
Return Policy.
1. If Charder is responsible for a fault or defect present upon receipt of the
unit, Charder shall either repair the fault, or supply a replacement unit.
Should the repairs or replacement delivery fail, statutory provisions shall
be valid. The period of warranty shall be two years, beginning on the date
of purchase. Please retain your receipt as proof of purchase.
2. No responsibility shall be accepted for damage caused through any of
the following reasons: unsuitable or improper storage or use, incorrect
installation or commissioning by the owner or third parties, natural wear
and tear, changes or modifications, incorrect or negligent handling,
chemical, electrochemical, or electrical interference, unless damage is
attributable to negligence on the part of Charder.
If device is not covered under warranty, a service maintenance charge will
apply, plus cost of replacement parts.
Before contacting your local Charder distributor for repair service, we
recommend considering the following troubleshooting procedures:
Self-inspection
1. Device will not power on
If battery power is depleted, replace with new batteries
If batteries are not used, check if the power adapter is plugged into
the device properly. Check if power adapter is plugged into mains
properly
2. Indicator showing "0000" ZERO SPAN out of range
Interference due to factors such as RF disturbance or ground
vibration. Relocate device to location without interference and try
again
External objects interfering with measurement platform. Clear
platform of objects and try again
Device may not function properly on soft surfaces. Relocate device to
location with solid, stable platform
If the steps above cannot resolve the problem, re-calibration may be
required to correct weighing accuracy

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Distributor support required
If the following errors occur, we recommend contacting your local Charder
distributor for repair or replacement services:
1. Device will not power on
Faulty on/off key
Broken or damaged wires causing short circuit or faulty connection
Safety fuse burnout
Faulty Adapter
2. Indicator damage
Possible hardware defects include: uneven brightness in LCD screen,
blurred text, smeared rainbow screen, incorrect decimal display
Unable to save or read data
Indicator shows "ERRL" after device is switched on
Keys not responding
Buzzer malfunction