Longest Science & Technology LGT-235 User manual

Portable Electro-Stimulation
Therapy Device
USER MANUAL
LGT-235
Guangzhou Longest Science & Technology Co., Ltd.

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TABLE OF CONTENTS
Safety Instructions .............................................................................................................................6
EMC Guidance.................................................................................................................................17
Clinical Instructions..........................................................................................................................25
Working Principle.............................................................................................................................27
Inspection of the Goods...................................................................................................................28
Overview of the Unit ........................................................................................................................30
MStim Arth Application.....................................................................................................................33
Operation Guidance.........................................................................................................................46
Care and Maintenance ....................................................................................................................49
Troubleshooting ...............................................................................................................................52
Technical Specifications...................................................................................................................55
Assistance and Spare Parts.............................................................................................................59
Warranty ..........................................................................................................................................60

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Foreword
Thank you for purchasing the LGT-235 Portable Electro-Stimulation Therapy Device from
our company.
This manual has been written for the owners and operators of the LGT-235 Portable
Electro-Stimulation Therapy Device. It contains general information on the instructions for
safety, intended use, working principle, operation, maintenance, troubleshooting, and warranty. In
order to maximize the use, efficiency, and working life of your unit, please read this manual
thoroughly and become familiar with the controls, as well as the accessories, before operating the
unit.Specifications put fifth in this manual were in effect at the time of publication. However, owing
to policy of continual improvement by Guangzhou Longest Science & Technology Co., Ltd., any
changes to these specifications may be made at any time without obligation on the part of
Guangzhou Longest Science & Technology Co., Ltd.
Before administering any treatment to a patient, the user of this equipment should read,
understand, and follow the information contained in this manual for each mode of treatment
available, as well as the indications, contraindications, warnings, and precautions.

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Product Description
The LGT-235 Portable Electro-Stimulation Therapy Device is a lightweight and portable
multifunctional electrotherapy device that provides TENS current, or MCR current.
It utilizes the low electric-current to stimulate muscle nerve to stimulate nerve and muscle
tissue, relieve pain and promote blood circulation, help improve symptoms, relieve pain, restore
and strengthen neuromuscular function.

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Safety Instructions
Symbols
1. Symbols on the medical device
Symbols
Explanation
Manufacturer
Date of manufacture
EU Representative
This product complies with European Directive 93/42 EEC for medical
products. (0598 is the notified body number)
Correct Disposal of This Product (Waste Electrical & Electronic Equipment)
Statement: Contact the local authorities to determine the proper method of
disposal of potentially bio-hazardous parts and accessories.

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Type BF applied part (i.e. electrode, knee pad for electrotherapy) complying
with IEC60601-1.
Protected against solid foreign objects of 12.5 mm (0.5 in) diameter and
greater;
Protected against vertically falling water drops when enclosure tilted up to
15 ° .
This device emits non-ionizing radiation.
Refer to instruction manual/ booklet
Caution output. It is placed near all electrode connections.
2. Symbols on the package
Symbols
Explanation
This side up
The transportation package must be vertical and straight up during transportation.

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Fragile, handle with care
The product inside the packaging could be easily damaged if dropped or handled
without care and attention.
Keep away from rain
The product package should keep out of the rain and not to store it in damp
conditions.
Temperature limitation
The product package should be stored at a temperature between -20 and 55
degrees (centigrade).
Upper limit of humidity
The product package should be stored at a humidity less than 93%.
Atmospheric pressure limitation
The product package should be stored at an atmospheric pressure between
86kPa and 106kPa.

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Precautionary Definitions
The precautionary instructions found in this section and throughout this manual are indicated
by specific symbols. Understand these symbols and their definitions before operating this
equipment. The definition of these symbols is as follows:
Text with a “CAUTION” indicator will explain possible safety infractions that could have the
potential to cause minor to moderate injury or damage to equipment.
Text with a “WARNING” indicator will explain possible safety infractions that will potentially
cause serious injury and equipment damage.
Text with a “DANGER” indicator will explain possible safety infractions that are imminently

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hazardous situations that would result in death or serious injury.
Explosion Hazard
Text with an “Explosion Hazard” indicator will explain possible safety infractions if this
equipment is used in the presence of flammable anesthetics.
Dangerous Voltage
Text with a ”Dangerous Voltage” indicator serves to inform the user of possible hazards
resulting in the electrical charge delivered to the patient or operator in certain treatment
configurations.
Refer to Instruction Manual/Booklet
NOTE: Throughout this manual, “NOTE” may be found. These Notes are helpful information to
aid in the particular area or function being described.

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Warnings and cautions
Please carefully read and understand the following warnings and cautions to ensure the safe
and correct use of the LGT-235 and to prevent injury.
Read, understand, and practice the precautionary operating instructions. Know the limitations
and hazards associated with using the LGT-235. Observe the precautionary and operational
decals placed on the unit.
Before using LGT-235 make sure you have read and understood all information provided in
this manual. Familiarity with the information included in this manual is an essential requirement
to ensure efficient and optimal use of the system, to avoid dangers to persons and to the
equipment, and to obtain good treatment results.
Improper installation, operation, or maintenance of the LGT-235 may result in malfunctions of
this unit or other devices.
In case of display failure or other obvious defects, switch the unit off immediately, and notify a
certified service technician.
Adjustments or replacement of components may result in the equipment failing to meet the
requirements for interference suppression.

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This LGT-235 should be kept out of the reach of children.
Do not use this unit near the heart or chest, above the neck, on the head, around the mouth or
on diseased skin.
The placement of the electrodes can be referenced to the reference icon provided by APP,
Note that the following parts cannot be placed:
a) carotid sinus (current may affect blood pressure and cardiac contraction, causing
arrhythmia);
b) infection site (which may aggravate the infection);
c) pregnant women's abdomen and lumbosacral (may cause uterine contractions);
d) surgical site (muscle contraction may cause wound dehiscence);
e) malignant neoplasms;
f) sensory defects or parts that are allergic to the electrodes;
g) eye.
Do not use this unit for purposes other than treatment indicated in this manual;
Do not use the LGT-235 with high frequency surgical equipments on the patient. It will cause
unstable output when the unit is close to the high frequency equipments (in the same room
and without shield).
Do not use electrodes with an active area of less than 25 cm²(when you choose the TENS
mode) due to the risk of associated burning. Proceed systematically with caution when the

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density of the current is over 2 mA/ cm².
Do not modify this device without authorization of the manufacturer.
Only use this device with the charger, cables, electrodes and accessories recommended by
the manufacturer.
The LGT-235contains built-in batteries that cannot be removed by the user. Do not replace it
by yourself to avoid damage the batteries or device. If necessary, please contact the company
or the company authorized maintenance personnel to replace.
Do not use this device simultaneously with other therapeutic device (such as microwave), to
avoid mis-operation.
Please dispose of the equipment and other accessories according to local regulations. Do not
treat them as household waste. Do not put the device in fire or water. If the batteries are not
properly disposed, it may cause a battery explosion.
Do not use when the unit is charging.
Always check the device and the electrodes for damage before use.
If the unit is not functioning properly or you feel discomfort, immediately stop using the unit. If
you feel any trouble with your body or skin, consult the doctor and follow his/her instructions.
The self-adhesive electrode limited to the same person to use, do not use in another patients

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to prevent infection.
If the electrode loses viscosity, please replace the electrode in order to maintain good electrical
properties.
Do not use this unit in places with high humidity such as the bathrooms or while taking a bath
or shower.
Do not use this unit while sleeping. The main unit may develop trouble, or the pad may move
to an unexpected region and cause ill health.
Clean the device using a dry soft cloth. Do not use cleaning solvents or other chemical
substances in order to avoid any damage.
Make sure that you end the treatment by switching off the units or by setting the intensity to 0
mA before you remove the units or the electrodes. If you do not end the treatment, you may
experience an unpleasant sensation in your fingers. This sensation is not harmful, but can be
unpleasant.
Handle the unit with care. Do not drop, knock, or shake the unit. Rough handling can damage
internal circuit boards.
Do not apply stimulation while driving, operating machines or while performing any other
activity in which electrical stimulation can put you at risk of injury.
Always disconnect the power charger from the mains after use.

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FCC
Changes or modifications not expressly approved by the party responsible for compliance
could void the user’s authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
-- Consult the dealer or an experienced radio/TV technician for help.

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This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
FCC RF warning statement: The device has been evaluated to meet general RF
exposure requirement. The device can be used in portable exposure condition without
restriction.
This device and its antenna(s) must not be co-located or operation in conjunction with
any other antenna or transmitter.
FCC ID: 2ANHPLGT-235

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EMC Guidance
This product needs special precautions regarding EMC and needs to be installed and put into
service according to the EMC information provided, and this unit can be affected by portable and
mobile RF communications equipment.
Do not use a mobile phone or other devices that emit electromagnetic fields, near the unit.
This may result in incorrect operation of the unit.
This unit has been thoroughly tested and inspected to assure proper performance and
operation!
This machine should not be used adjacent to or stacked with other equipment and that if
adjacent or stacked use is necessary, this machine should be observed to verify normal
operation in the configuration in which it will be used.

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Accessory Information:
Item
Cable Length
Manufacturer & Address
Power cord (adapter)
0.13 m
Shenzhen Hongyi Electronic Technology Co., Ltd.
A05-1, 2/F, 3 Bldg, EC building, YuAnju, Baoan District, Shenzhen, China
Electrode lead hose
1.2 m
Guangzhou Longest Science & Technology Co., Ltd.
5&6F, Building B4, No.11, KaiyuanAvenue, Science City, Guangzhou Hi-tech
Industrial Development Zone, 510530 Guangzhou, Guangdong Province,
P.R. China
Bluetooth Specifications:
Bluetooth version: 4.0
Frequency Range: 2.402GHz ~ 2.480GHz
Output Power: 1mW

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Guidance and manufacture’s declaration – electromagnetic emission
The LGT-235 is intended for use in the electromagnetic environment specified below. The
customer of the user of the LGT-235 should assure that it is used in such an environment.
Emission test
Compliance
Electromagnetic environment –guidance
RF emissions
CISPR 11
Group 1
The LGT-235 use 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 emission
CISPR 11
Class B
The LGT-235 is suitable for use in all
establishments, including domestic
establishments and those directly connected to the
public low-voltage pump 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

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Guidance and manufacture’s declaration – electromagnetic immunity
The LGT-235 is intended for use in the electromagnetic environment specified below. The
customer or the user of LGT-235 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 floor 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
±2kV for power
supply lines
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 differential
mode
Mains power quality should be
that of a typical commercial or
hospital environment.
Voltage dips,
short
interruptions
and voltage
<5% UT(>95% dip
in UT) for 0.5 cycle
40% UT(60% dip in
<5% UT(>95% dip
in UT) for 0.5 cycle
40% UT(60% dip in
Mains power quality should be
that of a typical commercial or
hospital environment. If the user
of the LGT-235 requires

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variations on
power supply
input lines
IEC
61000-4-11
UT) for 5 cycles
70% UT(30% dip in
UT) for 25 cycles
<5% UT(>95%
dip in UT) for 5 sec
UT) for 5 cycles
70% UT(30% dip in
UT) for 25 cycles
<5% UT(>95% dip
in UT) for 5 sec
continued operation during
power mains interruptions, it is
recommended that the LGT-235
be powered from an
uninterruptible power supply or a
battery.
Power
frequency
(50Hz/60Hz)
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 UTis the a.c. mains voltage prior to application of the test level.