Graham Field grafco GF-3 User manual

Transcutaneous Electrical
Nerve Stimulation
(TENS)
Model GF-3 / GF-3T
Operation Manual
Read this manual before operating your GF-3 / GF-3T.
Save this manual for future use.
GF-3-INS-LAB-RevH20

2
CONTENTS
GENERAL DESCRIPTION ................................................................................................... 3
WHAT IS TENS? ............................................................................................................... 3
INDICATIONS AND CONTRAINDICATIONS........................................................................... 3
SAFETY ........................................................................................................................... 4
ABOUT THE DEVICE.......................................................................................................... 6
EXPLANATION OF CONTROL FUNCTIONS........................................................................... 7
ATTACHING THE LEAD WIRES........................................................................................... 8
ELECTRODE SELECTION AND CARE................................................................................... 8
TIPS FOR SKIN CARE ....................................................................................................... 9
CONNECTING THE DEVICE.............................................................................................. 10
BATTERY INFORMATION................................................................................................. 11
CARING FOR YOUR DEVICE............................................................................................. 12
TROUBLESHOOTING....................................................................................................... 13
TECHNICAL SPECIFICATIONS.......................................................................................... 14
OUTPUT SPECIFICATIONS............................................................................................... 14
LIMITED WARRANTY...................................................................................................... 15
MANUEL D’UTILISATION EN FRANÇAIS............................................................................ 17
MANUAL DE OPERACIÓN EN ESPAÑOL............................................................................ 33

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GENERAL DESCRIPTION
TENS, Transcutaneous Electrical Nerve Stimulation, is a method of relieving
symptomatic chronic intractable pain.
WHAT IS TENS?
TENS is a treatment whereby electrical impulses are applied to nerves
through electrode pads placed on the skin. TENS is non-invasive and does not
use pharmaceuticals.
TENS uses a two-pronged approach to pain relief. First, sensory nerves
are targeted, stimulating them to block pain signals and prevent their
transmission to the brain. Second, TENS promotes the production of
endorphins — neurochemicals occurring naturally in the brain — which have
analgesic properties.
INDICATIONS AND CONTRAINDICATIONS
Read the operation manual before using this TENS device.
Federal law (USA) restricts this device to sale by or on the order of a
physician.
Indications
TENS is indicated to be used under a physician’s prescription for the
symptomatic relief of chronic intractable pain.
Contraindications
• Any electrode placement which applies current to the carotid (neck)
region.
• Patients with implanted electronic devices (for example, a pacemaker)
or metallic implants should not undergo TENS treatment without first
consulting a physician.
• Any electrode placement which causes current to flow transcerebrally
(through the head).
• The use of unit whenever pain symptoms are undiagnosed and the
etiology is unknown.

4
SAFETY
Always follow basic safety precautions, including the following:
WARNING: Indicates a potential hazard situation or unsafe practice that, if
not avoided, could result in death or serious personal injury.
CAUTION: Indicates a potential hazard or unsafe practice that, if not avoided,
could result in moderate or minor personal injury.
sNOTICE: Indicates a potential hazard or unsafe practice that, if not avoided,
could result in product or property damage.
Warnings
WARNING: Explosion hazard
Explosion hazard is possible if used in the presence of explosives, flammable
materials or flammable anesthetics.
WARNING: Heart disease
Caution should be used when applying the device to patients suspected of
having heart disease. Further clinical data is needed to show if there are
adverse side effects on individuals with heart disease.
WARNING: Keep this device out of the reach of children.
WARNING: The safety of the device during pregnancy or delivery has not been
established.
WARNING: Do not place electrodes on front of the throat. This may result in
spasms of the laryngeal and pharyngeal muscles.
WARNING: Do not place the electrodes over the carotid nerve.
WARNING: The device is not effective for pain of central origin (headaches).
WARNING: Avoid adjusting controls while operating machinery or vehicles.
WARNING: The device may interfere with electronic monitoring equipment
(such as ECG monitors and ECG alarms).

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WARNING: Do not change any mode during treatment.
WARNING: Some patients may experience skin irritation or hypersensitivity
due to the electrical stimulation or electrical conductive medium. Using an
alternate conductive medium or alternate electrode placement can usually
reduce the irritation. Consult your physician / clinician before using an
alternative conductive medium or electrode placement.
WARNING: Electrodes should not be placed over the eyes, in the mouth, or
internally.
WARNING: The device has no curative value.
WARNING: TENS devices should be used only under the continued supervision
of a physician / clinician.
WARNING: TENS is a symptomatic treatment and as such suppresses the
sensation of pain which would otherwise serve as a protective mechanism.
WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov.
Cautions and Adverse Reactions
CAUTION: Isolated cases of skin irritation may occur at the site of electrode
placement following long-term application.
CAUTION: If skin irritation occurs TENS treatment should be stopped and
electrodes removed until the cause of the irritation can be determined.
CAUTION: Effectiveness is highly dependent upon patient selection of a doctor
qualified in the management of pain patients.
CAUTION: If the device treatment becomes ineffective or unpleasant,
stimulation should be discontinued until reevaluation by a physician /
clinician.
CAUTION: Always turn the device OFF before applying or removing electrodes.

6
ABOUT THE DEVICE
This device is a battery-operated device that includes two controllable output
channels. This device creates electrical impulses in which intensity, duration,
and modulation can be altered. The device controls are easy to use and the
slide cover protects accidental changes in settings.
System Components
Your device will include the following components or accessories:
• TENS unit
• Carrying case
• Lead wires
• Operation manual
• Electrodes
Also required (not included): One 9-Volt alkaline battery.
Device Controls
MODE
TIMER (MIN)
(uS)
PULSE WIDTH
30
60
100
150 200
220
260
(Hz)
PULSE RATE
2
3
4510 20
70
130
150
120
250
Channel 1 & 2
Lead Wire Connector
Channel 1 & 2 ON/OFF and
Intensity Control Knob
Channel 1 & 2 Indicator Light
Pulse Width Control Knob
Mode Selection Switch
Pulse Rate Control Knob
Timer Selection Switch
(GF-3T Only)
Battery Compartment
Battery Strip

7
Front Panel Cover
This cover located on the front of the unit conceals the controls for Pulse
Width, Pulse Rate, Mode Selector, and Timer (GF-3T only). Press the top
portion of the cover and pull down in order to open the cover.
EXPLANATION OF CONTROL FUNCTIONS
Ch1 / Ch2 Knobs The Channel 1 and Channel 2 Intensity Control Knobs control the strength
of the stimulation and also function as ON/OFF controls for each channel.
MODE Selection
Switch
The MODE Selection
Switch sets the
treatment mode.
The three modes
are Burst (B),
Continuous (C), and
Modulation (M).
Burst Mode (B) releases individual bursts twice
per second, pulse width is adjustable, and the
pulse rate is set at 100 Hz per second.
Continuous Mode (C) delivers stimulation
continuously at the settings determined by the
Intensity, Width, and Rate Knobs.
Modulation Mode (M) decreases the pulse width
to 60% of the original setting; this decreased
pulse width is maintained for 1.5 seconds before
returning to the original pulse width setting,
which is maintained for 3.5 seconds. The cycle is
then repeated. The intensity and pulse rate are
adjustable.
Pulse Width
Control Knob
The Pulse Width Control Knob regulates the pulse width for both channels.
Pulse Rate
Control Knob
The Pulse Rate Control Knob regulates the number of pulses per second for
both channels.
Timer Selection
Switch *
(GF-3T Only)
The Timer Selection Switch selects the duration of TENS treatment. The three
Timer selections are Continuous (C), 30 minutes (30), and 60 minutes (60).
* To resume operation or reset the Timer, turn the Intensity Control
Knob OFF and then ON.

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ATTACHING THE LEAD WIRES
WARNING: Ensure the device is OFF before connecting the lead wires.
WARNING: Never insert the lead wire plug into an AC power supply socket.
Personal injury and/or damage to the TENS unit could occur.
sNOTICE: Use care when you plug and unplug the wires. Pulling on the lead
wire instead of its insulated connector may cause wire breakage.
The lead wires provided with the device insert into the ports located the top
of the unit. After connecting the wires to the unit, attach each wire to an
electrode.
Lead wires provided with the device are compliant with mandatory
compliance standards set forth by the FDA.
ELECTRODE SELECTION AND CARE
Using Electrodes
Use the electrodes as prescribed. Follow application procedures outlined in
electrode packaging to maintain stimulation and prevent skin irritation. The
electrode packaging provides instructions for care, maintenance, and proper
storage of electrodes.

9
TIPS FOR SKIN CARE
Good skin preparation is important for effective and comfortable use of your
TENS device.
• Always clean the electrode site with mild soap and water solution, rinse
well, and dry thoroughly prior to any electrode application.
• Any excess hair should be clipped, not shaved, to ensure good electrode
contact with the skin.
• If a skin treatment or preparation is recommended by your physician
/ clinician, apply the skin treatment as recommended, let dry, and
apply electrodes as directed. Following these recommendations will
both reduce the chance of skin irritation and extend the life of your
electrodes.
• Avoid excessive stretching of the skin when applying electrodes. Proper
application is best accomplished by applying the electrode, then
smoothly pressing it in place from the center outward.
• When removing electrodes, always remove by pulling in the direction of
hair growth.
• It may be helpful to rub skin lotion on electrode placement area when not
wearing electrodes.

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CONNECTING THE DEVICE
Insert battery
Turn the device to the OFF position before inserting or removing the battery.
When inserting the battery, ensure the battery polarity (+ and –) markings
match the markings on the device.
Prepare the Skin
Prepare the skin as previously described and according to the instructions
provided with your electrodes. Before attaching the electrodes, identify
the area that your physician / clinician has recommended for electrode
placement.
1. Connect the lead wires to the electrodes: connect the lead wires to the
electrodes before applying the electrodes to the skin.
WARNING: Ensure both Intensity Control Knobs for Channel 1 and 2 are
turned to the OFF Position (counterclockwise) before applying the electrodes.
2. Place electrodes on the skin: place the electrodes on the skin as
recommended by your physician / clinician.
3. Insert lead wire connector into the device: plug end of lead wire into the
channel output port (jack) to be used; push the plug in as far as it will go.
4. Select treatment settings: ensure your unit is still set to the proper
settings recommended by your physician / clinician.
5. Adjusting Channel Intensity Control: locate the Intensity Control Knob
(Channel 1 or 2) at the top of the unit. Slowly turn the Intensity Control
Knob clockwise until the stimulation is at the level recommended by your
physician / clinician (if you don’t feel anything, turn the Knob OFF then
ON again and carefully turn the Control Knob until you feel a tingling
or slight twitch under or around the electrodes). Always start with the
lowest setting and increase the intensity slowly.
If the stimulation levels are uncomfortable or become uncomfortable,
reduce the stimulation intensity to a comfortable level; or cease
stimulation and contact your physician.

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BATTERY INFORMATION
When the indicator lights on the front of the unit no longer illuminate, the
battery has become too weak to power the unit, and the existing battery
should be replaced with a new battery. At this point, the unit will turn OFF
until a new battery is inserted.
sNOTICE: GF Health Products, Inc. recommends the use of only a 9V alkaline
battery with this device.
Replacing the Battery
When the indicator lights on the front of the unit no longer illuminate, the
battery should be replaced.
1. Turn unit OFF.
2. Remove the front panel cover by pressing on the top of the panel and
pressing down in order to slide the panel down. Continue sliding the
panel downwards until the panel is completely removed from the unit.
This will reveal the battery compartment.
3. Remove the discharged battery from the device.
4. Place new battery in the compartment. Note: Be sure the proper polarity
(+ and –) markings match the markings in the device.
5. Replace the front panel cover.
6. Dispose of the old battery according to local guidelines and regulations.

12
CARING FOR YOUR DEVICE
Your device may be cleaned by wiping gently with a damp cloth moistened
with mild soap and water. Do not immerse the device in water or other
liquids.
Wipe lead wires with damp cloth moistened with soap and water. Do not
immerse the lead wires.
To properly store the device for an extended period of time, remove the
battery from the unit. Place the unit and accessories in the carrying case
provided and store in a cool, dry location.

13
TROUBLESHOOTING
If the device does not function properly:
1. Ensure the battery is properly installed or replace the battery. Be sure
to observe proper polarity markings when replacing the battery. If the
indicator lights on the front of the unit no longer illuminate when it is
turned on, replace the battery and check again.
2. If the indicator light is flashing, the intensity has been adjusted, and no
stimulation is felt, check to ensure the lead wires are properly connected
and the electrodes are properly applied to the skin. If the unit appears to
be functioning and no stimulation is felt, the lead wires or electrodes may
need to be replaced.
3. If the battery appears to be charged and the unit is not functioning, turn
both Intensity Control Knobs to the OFF position (counterclockwise).
Then gradually turn the Intensity Control Knob (clockwise) until
stimulation is felt. If device still is not working, turn the unit off and
contact your authorized GF Health Products, Inc. distributor.
If there is any other problem, please contact an authorized GF Health
Products, Inc. distributor. Do not try to repair a defective device.

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TECHNICAL SPECIFICATIONS
Channel Dual, isolated between channels
Modes of Operation Burst, Continuous, and Modulation
Pulse Intensity Adjustable 0 mA – 80 mA peak into 500 ohm load each channel,
constant current
Pulse Width 30uS-260uS (adjustable)
Pulse Rate 2 Hz-150 Hz (adjustable)
Timer (GF-3T Only) Continuous, 30 minutes, and 60 minutes
Burst Mode (B) Burst consists of 2 bursts per second at 100 Hz
Wave Form Asymmetrical bi-phasic square pulse
Voltage 0 – 100 Volt (open circuit)
Power Source 9-Volt battery
Dimensions 95 mm x 65 mm x 23.5 (height x width x thickness)
Weight 115 g (including battery)
OUTPUT SPECIFICATIONS
Mode Intensity
(mA)
Pulse Width
(uSec)
Pulse Rate
Frequency (Hz)
Cycle Time
(Sec)
Burst Adj. 0-80 Adj. 30-260 100 Hz xed N/A
2 bursts per Sec
Continuous Adj. 0-80 Adj. 30-260 Adj. 2-150 Hz N/A
Modulation Adj. 0-80 Modulates down
from preset width
setting by 60%
then back to
original setting
Adj. 2-150 Hz 5 Sec total time

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LIMITED WARRANTY
SCOPE OF WARRANTY
GF Health Products, Inc. (“GF”) warrants to the original purchaser only that it will replace or repair components, at GF’s sole
discretion, that are defective in material or workmanship under normal use and service. All warranties are conditioned upon the
proper use of the products strictly in accordance with good commercial practice and applicable GF instructions and manuals,
including proper use and maintenance. To the extent that a component is warranted by a third party, GF conveys all of its rights
under that warranty to the original purchaser, to the extent permitted.
This limited warranty shall only apply to defects that are reported to GF’s customer service team within the applicable warranty
period and which, upon examination by GF or its authorized representative, prove to be a warranty item. This limited warranty is
not transferable. Within the guidelines set forth in this document, this product is warranted for one year.
The applicable warranty period shall commence from date of shipment to the original customer, unless there is an expiration
date on the component in which case the warranty shall expire on the earlier of warranty period or the expiration date.
OBTAINING WARRANTY SERVICE
This limited warranty shall only apply to defects that are reported to the Distributor from whom the Customer purchased the
product within the applicable warranty period. If there is not a Distributor, you must contact GF directly by calling 1.770.368.4700,
sending a fax request to 1.770.368.2386, or by e-mailing a request to cs@grahameld.com. Specic directions will be provided by
the Customer Service Representative. Failure to abide by the specic directions will result in denial of the warranty claim.
EXCLUSIONS
The warranty does not cover and GF shall not be liable for the following:
1) Defects, damage, or other conditions caused, in whole or in part, by misuse, abuse, negligence, alteration, accident, freight
damage, tampering or failure to seek and obtain repair or replacement in a timely manner;
2)
Products which are not installed, used, or properly cleaned and maintained as required in the ofcial manual for the applicable
product;
3) Products considered to be of a consumable nature including, but not limited to: casters, lters, fuses, gaskets, lubricants,
and charts;
4) Accessories or parts not provided by GF;
5) Charges by anyone for adjustments, repairs, replacement parts, installation or other work performed upon or in connection
with such products which are not expressly authorized in writing, in advance, by GF;
6) Any labor or shipping charges incurred in the replacement part installation or repair;
7) Costs and expenses of regular maintenance and cleaning; and
8) Representations and warranties made by any person or entity other than GF.
ENTIRE WARRANTY, EXCLUSIVE REMEDY AND CONSEQUENTIAL DAMAGES DISCLAIMER
THIS WARRANTY IS GF’S ONLY WARRANTY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED. GF MAKES NO
IMPLIED WARRANTIES OF ANY KIND INCLUDING ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE.
IF ANY MODEL OR SAMPLE WAS SHOWN TO THE CUSTOMER, SUCH MODEL OR SAMPLE WAS USED MERELY TO ILLUSTRATE THE
GENERAL TYPE AND QUALITY OF THE PRODUCT AND NOT TO REPRESENT THAT THE PRODUCT WOULD NECESSARILY CONFORM TO
THE MODEL OR SAMPLE IN ALL RESPECTS.
THIS WARRANTY IS LIMITED TO THE REPAIR OR REPLACEMENT OF THE DEFECTIVE PARTS. GF SHALL NOT BE LIABLE FOR AND
HEREBY DISCLAIMS ANY DIRECT, SPECIAL, INDIRECT, INCIDENTAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES, INCLUDING, BUT
NOT LIMITED TO: DAMAGES FOR LOSS OF PROFITS OR INCOME, LOSS OF USE, DOWNTIME, COVER, OR EMPLOYEE OR INDEPENDENT
CONTRACTOR WAGES, PAYMENTS AND BENEFITS.
The warranties contained herein contain all the representations and warranties with respect to the subject matter of this
document, and supersede all prior negotiations, agreements and understandings with respect thereto. The recipient of this
document hereby acknowledges and represents that it has not relied on any representation, assertion, guarantee, warranty,
collateral contract or other assurance, except those set out in this document.
NOTES:
1) Additional terms and conditions may apply.
2) Freight claims must be notated on the appropriate shipping documents and must be made with immediacy. International,
federal and state regulations govern specic requirements for freight claims. Failure to abide by those regulations may
result in a denial of the freight claim. GF will assist you in ling the freight claim.
3) Claims for any short shipment must be made within three (3) days of the invoice date.

1.770.368.4700
Information contained herein is subject to change.
The most current and complete product information can be found on our website.
www.grahameld.com
© 2008, GF Health Products, Inc. All Rights Reserved.
Grafco is a trademark of GF Health Products, Inc.,
One Graham-Field Way, Atlanta GA 30340-3140
GF Health Products, Inc. is an ISO 13485:2016 Certied Company.
Manufactured for GF Health Products, Inc.
Made in Taiwan

Stimulation Électrique
Transcutanée du Nerf
(TENS)
Modèle GF-3 / GF-3T
Manuel d’Utilisation
Lisez ce manuel avant d’utiliser votre GF-3 / GF-3T.
Conservez ce manuel pour une utilisation future.
GF-3-INS-LAB-RevH20

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CONTENU
DESCRIPTION GÉNÉRALE ............................................................................................... 19
QU'EST-CE QUE TENS? ................................................................................................... 19
INDICATIONS ET CONTRE-INDICATIONS........................................................................... 19
SÉCURITÉ...................................................................................................................... 20
SUR L’APPAREIL ............................................................................................................ 22
EXPLICATION DES FONCTIONS DE CONTRÔLE ................................................................. 23
FIXER LES FILS.............................................................................................................. 24
SELECTION ET SOIN DES ÉLECTRODES ........................................................................... 24
CONSEILS POUR SOINS DE LA PEAU............................................................................... 25
CONNEXION DE L’APPAREIL ........................................................................................... 26
RENSEIGNEMENTS SUR LA PILE..................................................................................... 27
ENTRETIEN DE VOTRE APPAREIL .................................................................................... 28
DÉPANNAGE .................................................................................................................. 29
SPÉCIFICATIONS TECHNIQUES ....................................................................................... 30
SPÉCIFICATIONS DE PUISSANCE .................................................................................... 30
GARANTIE LIMITÉE ........................................................................................................ 31

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DESCRIPTION GÉNÉRALE
TENS, Stimulation Électrique Transcutanée du Nerf, est une méthode de
relaxation symptomatique des douleurs chroniques rebelles.
QU'EST-CE QUE TENS?
TENS est un traitement par lequel les impulsions électriques sont appliquées aux
nerfs par blocs d'électrodes placées sur la peau. TENS est non invasive et ne pas
utiliser de produits pharmaceutiques.
TENS utilise une approche à deux volets pour soulager la douleur. Tout d'abord,
les nerfs sensitifs sont ciblées, les incitant à bloquer les signaux de douleur et
d'empêcher leur transmission vers le cerveau. Deuxièmement, TENS favorise la
production d'endorphines - substances neurochimiques, naturellement présentes
dans le cerveau - qui ont des propriétés analgésiques.
INDICATIONS ET CONTRE-INDICATIONS
Lisez le manuel d'utilisation avant d'utiliser cet appareil TENS.
La loi fédérale (USA), cet appareil ne peut être vendu que sur ordonnance d'un
médecin.
Indications
TENS est indiqué pour être utilisé sur ordonnance d'un médecin pour le
soulagement symptomatique de la douleur chronique rebelle.
Contre-indications
• Tout placement des électrodes qui s'applique actuellement à la carotide (cou)
région.
• Les patients avec des appareils électroniques implantés (par exemple, un
stimulateur cardiaque) ou des implants métalliques ne devraient pas subir un
traitement TENS sans d'abord consulter un médecin.
• Tout placement des électrodes qui provoque le passage du courant
transcérébrales (de la tête).
• L'utilisation de l'unité chaque fois que les symptômes de douleur ne sont pas
diagnostiqués et l'étiologie est inconnue.

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SÉCURITÉ
Toujours suivre les consignes de sécurité élémentaires, y compris les suivantes:
AVERTISSEMENT: Indique une situation de danger potentiel ou une pratique
dangereuse qui, si elle n'est pas évitée, pourrait entraîner la mort ou des blessures
graves.
PRÉCAUTION: Indique un danger potentiel ou une pratique dangereuse qui, si elle n'est
pas évitée, pourrait entraîner des blessures mineures.
sAVIS: Indique un danger potentiel ou une pratique dangereuse qui, si elle n’est pas
évitée, pourrait entraîner des dommages matériels du produit ou propriété.
Avertissements
AVERTISSEMENT: Risque d'explosion
Risque d'explosion est possible si elle est utilisée dans la présence d'explosifs,
inflammables ou anesthésiques inflammables.
AVERTISSEMENT: Les maladies du cœur
Il faut être prudent lors de l'application de l’appareil pour les patients suspectés
d'avoir une maladie cardiaque. De données cliniques complémentaires sont
nécessaires pour montrer s'il existe des effets secondaires néfastes sur les individus
atteints d'une cardiopathie.
AVERTISSEMENT: Gardez cet appareil hors de portée des enfants.
AVERTISSEMENT: La sécurité de l'appareil pendant la grossesse ou de livraison n'a pas
été établie.
AVERTISSEMENT: Ne pas placer les électrodes sur le devant de la gorge. Cela peut
provoquer des spasmes des muscles du larynx et du pharynx.
AVERTISSEMENT: Ne pas placer les électrodes sur le nerf carotidien.
AVERTISSEMENT: L’appareil n'est pas efficace pour les douleurs d'origine centrale
(maux de tête).
ATTENTION: Éviter le déplacement des contrôles tandis que les véhicules ou
l'utilisation de machines.