marsden MG-4800 User manual

USER MANUAL
MG-4800
Please take time to read these
instructions before starting
to use the scale
Version: 2.0 06/09

Contents
Introduction 3
Specification 3
General Information 4
Safety Instructions 4
Environmental 4
Cleaning 4
Maintenance 5
Before Use 5
Incorrect Gripping Posture -1 6
Incorrect Gripping Posture -2 7
Correct Gripping Posture -1 8
Correct Gripping Posture -2 9
Instruction for Battery Installation 10
LCD Display 11
Key Functions 12
Mode Switching 13
Mode Description 14
Error Messages 18
Declaration of Conformity 19
Page 2

Thank you for choosing this Marsden hand grip dynamometer. This device has
been designed for simple and straightforward use. Please use this document
as guidance for most effective use. If you need help with using the MG-4800
and cannot find the information you need in this document, please call
Marsden on 01709 364296 or email [e-mail].
Specification
Capacity
80kg (blue)
40kg (green)
20kg (red)
Division
0.1kg/0.2lb
LCD Display
0.5 inch 4 digit LCD
Operating Temperature
5°C / 35°C
Unit
Kg / lb
Dimensions (including handles)
212 x 55 x 101mm
Battery
CR-2450 x 1
Auto Off Time
60 sec
Standard Accessory
Carry Case x1
CR-2450 x 1
Spring Set 80kg x 1
Spring Set 40kg x 1
Spring Set 20kg x 1
MG-4800 x 1
Page 3

General Information
The Medical Handgrip Dynamometer is a medical device for doctors to evaluate the recovery condition
of a patient’s impaired hand. The data acquired from the Medical Handgrip Dynamometer could be used
as a reference for therapists and physicians to view the rehabilitation progress. The Medical Handgrip
Dynamometer provides rehabilitation exercise solutions for patients and physicians.
Safety Instructions
Before putting the device into use, please read through this User Manual carefully. They contain important
instructions for installation, proper use and maintenance of the device. The manufacturer shall not be
liable for damages cause by failure to heed the following instructions:
•When using electrical components always comply with the appropriate regulations.
•Improper installation will render the warranty null and void.
•Ensure the voltage marked on the power supply unit matches your mains power supply.
•This device is designed for indoor use only.
•Observe the permissible ambient temperatures for use (see Specification).
•The device meets the requirements for electromagnetic compatibility. Do not exceed the
maximum values specified in the applicable standards.
Environmental
•The optimum operating temperature for the scale is 5℃to +35℃; although it will operate at
higher and lower temperatures the battery life will be adversely affected.
•All batteries contain toxic compounds; disposal of batteries should be delegated to a competent
organisation, complying with the deposit of Poisonous Waste Regulation 1972.
•Please do not incinerate batteries.
Cleaning
•Always power off the device before cleaning.
•We would recommend using alcohol-based wipes or similar when cleaning the device.
•Please do not use large amounts of water when cleaning the device as this will cause damage to
the device electronics, you should also refrain from using corrosive liquids or high-pressure
washers.
Page 4

Maintenance
The device does not require any routine maintenance. However, we recommend checking the device’s
accuracy at regular intervals. The regularity of these checks is dependent on the level of use and
the condition of the device. If any inaccuracies occur, please contact your local dealer/service
partner, or Marsden directly
Before Use
Before reading the detailed instructions on how to use all the measuring functions that are built into your
device, please read the following important guidelines:
•Always be sure that the display shows ‘Zero’ before use, if it does not then please press the ZERO
key.
•The Medical Handgrip Dynamometer is designed to detect when a stable force is achieved, the
indicator will emit an audible ‘beep’ to indicate a stable force value, your reading should be taken
at this point.
Page 5

Incorrect Gripping Posture -1
Page 6

Incorrect Gripping Posture -2
Page 7

Correct Gripping Posture -1
Page 8

Correct Gripping Posture -2
Page 9

Instruction for Battery Installation
MG-4800 uses a CR-2450 lithium battery. Please read the following instruction before replacing the
battery.
1)Remove the battery cover by turning anticlockwise.
2) Install the new CR-2450 lithium battery.
3) Lock the battery cover by turning clockwise.
Page 10

LCD Display
Page 11

Key Functions
/ZERO : Power on / Power Off / Zero
Press to Power On, hold for 3 seconds to Power Off.
Press to ZERO the value.
Mode: Mode selection.
Set : Real Mode: Unit switches.
Other modes: digit adjusts.
Please release the device before zeroing the value.
Page 12

Mode Switching
•The following procedure gives you a specific idea of how to use the Medical Handgrip
Dynamometer.
• Please note that Real Mode is the default mode. If the device is powered off in any other
modes. Next time it will start with the last mode selected prior to being powered off.
Page 13

Mode Description
Real Mode
The Real Mode is a dynamic mode. The force value fluctuates according to the gripping force during
usage.
Real Time Display:
Following is an operation process.
Page 14

Count Mode
The Count Mode is for physician to set up a rehabilitation program for a patient to do rehabilitation
exercise with exact force measurement.
For Example:
Set up target grip force before use.
NOTE: Only if the force reaches the target is counted one times.
Setup Target Grip Force:
Page 15

AVG Mode
The AVG Mode is for physician to evaluate the average of both hand’s force.
For example:
Grip once individually with right and left hand, then press SET to calculate average value of last two
grips.
NOTE: The force must be greater than 2kg
Page 16

Max Mode
The MAX Mode presents the maximum force of an impaired hand.
Medical professions can evaluate the condition of patient’s impaired hand through the results.
For example:
Page 17

Error Messages
Low Battery Indication
This warning will show that the voltage of the battery is too low
for operation, please replace the battery.
Force Under Zero
The force is under zero when power on; press the ZERO key and
try again.
Force Over Zero or Counting Error
The force is over limit when power on, please reduce the force
and power on again. If the problem still exists, please contact
Marsden.
Counting Error (Too Low)
The force is lower than the limit when power on, please increase
the force and power on again. If the problem still exists, please
contact Marsden.
EEPROM Error
The device has encountered internal error; please contact
Marsden.
Page 18

Patent Number List:
Japan Patent: 1314405
RCD Patent: 000702592-0001
US Patent: D564382
Page 19

Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
www.marsden-weighing.co.uk
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