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Graham-Field Grafco Analog TENS Unit

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Graham-Field Grafco Analog TENS Unit is a battery-operated device that has dual channels. T.E.N.S. (Transcutaneous Electrical Nerve Stimulation) is indicated under a physician;s prescription for the symptomatic relief and management of chronic (long-term) pain and the treatment of post-operative or post-traumatic pain.

Graham-Field Grafco Analog TENS Unit comes with:

  • TENS Unit 
  • Molded Carrying Case 
  • Operations Manual 
  • 4 Electrodes and Leadwires 
  • 9V Alkaline battery

Warning WARNING: Cancer and Reproductive Harm -

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.


  • TENS is indicated to be used under a physicians prescription for the symptomatic relief of chronic intractable pain.

Graham-Field Grafco Analog TENS Unit User Manual

How To Connect Grafco Analog TENS Unit?

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
  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 dont 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.


  • 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



Particulars Specifications
Channels Dual
Pulse Amplitude Adjustable, 80 mA peak maximum for positive pulse or -20 mA peak maximum for negative pulse into 500 ohm load each channel
Pulse rate (Adjustable) 2Hz to 120Hz
Pulse width (Adjustable) 40µ S to 260µ S
Modulation mode Pulse width is automatically varied in a cyclic pattern over an interval of nominally 5.0 seconds maximum. Pulse width decreases linearly
over a period of 1.5 seconds from the control setting value to a value which is decreased 45% maximum. The narrower pulse width will
continue for 2 seconds maximum, then increase linearly over a 1.5 second period to its original value. The cycle is then repeated.
Burst Mode: Bursts consist of 9 ±2 pulses at maximum pulse rate
Bursts occur twice every second
Wave form Asymmetrical Bi-Phasic
Maximum charge per pulse 21 micro coulombs maximum. Positive pulse and negative pulse separate.
Battery 9 volt battery (alkaline, or nickel-cadmium rechargeable).
Size 23mm x 64mm x 91mm
Weight 130grams (battery included)


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