marsden MHS-2500I User manual

USER MANUAL
MHS-2500I
Please take time to read these
instructions before starting
to use the scale
Version 1.0 05/17

Contents
Introduction 3
Product Specification 3
Safety Instructions 4
Explanation of Graphic Symbols 5
Installing the Batteries 6
Before Using the Scale 7
Operation: Basic Functions 8
Operation: Advanced Functions 9
EMC Guidance and Manufacturer’s Declaration 10
Recommended Separation Distance 12
Error Messages 13
Manufacturer’s Declaration of Conformity 14
Page 2

Thank you for purchasing a Marsden professional medical scale. This is a
precision Class III Weighing Instrument and considerate use will result in
many years of accurate weighing.
The scale has a maximum load capacity of 300kg which must not be
exceeded.
Product Specification
Model
MHS-2500I
Accuracy Class
Class III
Capacity/Division
300kg x 100g
Units of Measure
Kg
Function Keys
ON/ZERO/TARE/OFF, HOLD/BMI
Stabilization Time
1-2 Seconds
Operating Temperature
0 to 40˚C
Power Supply
6x AAA batteries
Indicator Display
2.5 cm LCD display with 5½ active digits
Dimensions of Scale
120mm x 50mm x 160mm
Page 3

Safety Instructions: Please read before using this device
Before putting the device into use, please read with care the information given in this user manual,
which contains important instructions for proper installation, use and maintenance of the device.
Marsden/the manufacturer shall not be liable for damages arising from failure to heed the following:
•When using electrical components under increased safety requirements, always comply with
appropriate regulations.
•Inappropriate installation/use will render the warranty null and void.
•Ensure the voltage marked on the power supply unit matches your mains supply.
•This device is designed for use indoors.
•Observe the permissible ambient temperatures for use.
•The device meets the requirements for electromagnetic capability. Do not exceed the
maximum values specified in the applicable standards.
•Batteries should be kept away from small children. If swallowed, promptly seek medical
assistance.
•Use only a correctly wired (100-240V AC) outlet. Do not use a multiple outlet extension cable.
•Physically disabled persons should not attempt to take measurements alone, but instead
should be assisted in using the device.
Do not exceed the maximum capacity of the scale. The safety requirements and notes on
appropriate use from the hoist manufacturer must also be observed.
The device must not be modified in any way. Any modification will invalidate the warranty.
After assembly the scale must not be rotated horizontally. Rotation is only allowed in
connection with 360 degree swivel bearings installed in the hoist.
If you have any problems, contact Marsden/your local dealer/service partner.
Cleaning
•We recommend using alcohol-based wipes or similar when cleaning the scale.
•Please do not use corrosive liquids, large amounts of water or high pressure washers.
•Always disconnect the scale from the mains power supply before cleaning.
Maintenance
•The scale does not require any routine maintenance. However, we recommend checking its
accuracy at regular intervals. If any inaccuracies occur, contact your local dealer/service partner.
•For information about Marsden service contracts in the UK call 01709 364296.
Disposing of the Scale
•This product should not be treated as regular household waste, but should be handed in to an
electrical/electronic equipment recycling centre.
•You can obtain further details from your local council, your municipal waste disposal company
or from where you purchased the product.
Page 4

Explanation of Graphic Symbols
SN-21300100
Designation of the serial number of
every device.
(Number as an example)
“Please note the accompanying
documents” or “Observe operating
instructions”
Charder Electronic Co. Ltd
No.103 Guozhong Rd, Dali Dist,
Taichung City 412, Taiwan (R.O.C)
Identification of manufacturer of
medical product including address.
Type B Applied Part.
Dispose of old appliances separately
from your household waste.
This product must be disposed of at a
communal collection point.
Carefully read this operation manual
before setup and commissioning, even if
you are already familiar with Marsden
scales.
Transport and storage temperature limit
indicating the upper and lower limit
(transport and storage temperature on
packaging).
Page 5

Installing the Batteries
The MHS-2500I requires 6x AAA batteries for operation. Please follow these
instructions for installing the batteries.
1. Locate the battery cover on the 2. Slide the battery cover off.
back of the scale.
3. Remove the battery housing. 4. Install 6x AAA size batteries.
5. Replace the battery housing. 6. Refit the battery cover.
Page 6

3∘
3∘
Before Using the Scale
Please ensure the MHS-2500I is fitted to the hoist correctly and hangs straight. A tilt of
more than 3°during operation will cause the scale to display incorrect readings.
.
We do not recommend using the scale with a hoist hanger bar that does not swivel 360
degrees.
Page 7

Operation: Basic Functions
ON/OFF/ZERO/TARE
Press once to switch on. Press and hold for three seconds to switch off.
Press once to return to zero.
Press once to tare the weight. Make sure the item you wish to tare off is on the
scale before pressing this button. The scale will show zero, and a minus reading
when the item is removed.
HOLD/BMI
During weighing, press this button once to lock and hold the weight reading on
the scale.
To disable the Hold function, press once again.
With the patient on the scale, press and hold for three seconds to enable BMI
mode.
In BMI mode, enter the patient’s height by pressing the ON/OFF/ZERO/TARE
button and the button. Press HOLD/BMI again to confirm.
The display will now show the patient’s BMI.
Page 8

Operation: Advanced Functions
Auto Power-off Time Adjustment
This feature affects the period of non-operation. If the scale, when switched on, is not
used for a pre-set period of time, it will shut off automatically.
This function can be set to 120 sec/ 180 sec/ 240 sec/ 300 sec.
Press for three seconds to enter Setup mode. will show on the
display.
Press the ON/OFF/ZERO/TARE button to enter mode.
Press HOLD/BMI to select the required delay time, for example In this
case, the auto power-off time is 180 seconds.
Press the ON/OFF/ZERO/TARE to confirm.
Page 9

EMC Guidance and Manufacturer’s Declaration
Guidance and manufacturer’s declaration –electromagnet emissions.
The MHS-2500I is intended for use in the electromagnetic environment specified below. The customer or user
of this scale should ensure that it is used in such environment.
Emission Test
Compliance
Electromagnetic environment-
guidance
RF emissions
CISPR 11
Group 1
This scale uses RF energy only for
its internal function. Therefore, its
RF emissions are very low and not
likely to cause any interference in
nearby electronic equipment.
RF emissions
CISPR 11
Class B
This scale 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
Guidance and manufacturer’s declaration –electromagnetic immunity.
The MHS-2500I is intended for use in the electromagnetic environment specified below. The customer or the
user of this scale should ensure 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,
cement 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 not applicable
Mains power quality should be
that of a typical commercial or
hospital environment.
Surge IEC 61000-4-5
1kV line(s) to line(s)
2 kV line(s) to earth
1 kV differential mode
not applicable
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%
<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%
Mains power quality should be
that of a typical commercial or
hospital environment. If the
user of this scale requires
continued operation during
Page 10

UT (>95% dip in UT) for
5s
UT (>95% dip in UT) for
5s
power mains interruptions, it is
recommended that this scale
is powered from an
uninterruptable power supply
or a battery.
Power frequency (50/60
Hz) magnetic field IEC
61000-4-8
3 A/m
3 A/m
The scale’s 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.
Guidance and manufacturer’s declaration –electromagnetic immunity.
This scale is intended for use in the electromagnetic environment specified below. The customer or the user
of the scale should ensure 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
3 Vrms
150 KHx to 80 MHz
3 Vrms
Portable and mobile RF
communications equipment
should be used no closer to
any part of the scale 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 meters (m).
Field strengths from fixed RF
transmitters, as determined by
an electromagnetic site
survey, should be less than the
compliance level in each
frequency range.
Interference may occur in the
Page 11

Radiated RF
IEC 61000-4-3
3 V/m 80 MHz to 2,5
GHz
3 V/m
vicinity of equipment marked
with the following symbol:
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.
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 MHS-2500I.
This scale is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or the user of the scale can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment (transmitters)
and the scale 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 meters (m) can be estimated using the equation applicable to the frequency of the transmitter, where p is
the maximum output rating of the transmitter in watts (w) according to the transmitter manufacturer.
NOTE1) At 80 MHz and 800 MHz, the separation distance for the high 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.
Page 12

Error Messages
Low Battery
Battery power is insufficient for the scale to
operate. Please replace the 6x AAA batteries.
Out of Tolerance –Over Zero
The scale cannot find zero. Check that
nothing is on the scale and retry.
Out of Tolerance –Under Zero
The scale is below zero range. Check that
nothing is on or catching the scale and retry.
Scale overload
The scale’s maximum capacity has been
exceeded. Please reduce the loading and try
again.
Scale Underloaded
The weight on the scale is below the
minimum weight reading. Please increase
the loading.
EEPROM Error
This indicates there is a fault with the scale’s
software and is normally caused by a fault
with the load cell or wiring. Contact your
local service representative.
Page 13

Manufacturer’s Declaration of Conformity
Page 14

Page 15

Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
Manufacturing and Distribution:
Unit 7, Centurion Business Park,
Coggin Mill Way,
Rotherham,
S60 1FB
Head Office:
Unit 1, Genesis Business Park,
Sheffield Road,
Rotherham
S60 1DX
www.marsden-weighing.co.uk
IN-1226 [12186B] 05/2017