OptiFlex K1 Continuous Passive Motion Therapy Unit User Manual

Contents OptiFlex-K1TM description

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OptiFlex-K1TM setup illustrations

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1.

2.

3. 4.

5.

6.

How to use the CPM device

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1.1 Fields of application 1.2 Therapy objectives 1.3 Indications 1.4 Contraindications

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OptiFlex-K1TM description

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2.1 Description of the device components 2.2 Description of the programming unit 2.3 Explanation of symbols 2.4 Explanation of symbols (connections and nameplate)

6 7 9 10

Safety information

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Device setup

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4.1 Connecting the device, performance check 4.2 Adjusting the device to the femur length 4.3 Adapting the leg support assemblies/footplate

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Setting the treatment values 5.1 General information on programming OptiFlex-K1TM 5.2 Information about the OptiFlex-K1TM therapy parameters

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Care, maintenance, transport

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6.1 Care 6.2 Maintenance (fuse replacement) 6.3 Transport

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7.

Environmental Protection Statement

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8.

Specifications

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9.

IEC 60601-1-2:2001

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9.1 Electromagnetic emissions 9.2 Electromagnetic immunity 9.3 Recommended Separation Distances

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10. How to reach us

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11. Technical service

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11.1 Technical hotline 11.2 Shipment 11.3 Spare parts

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1.1 Fields of application

1.3 Indications

OptiFlex-K1TM is a motor-operated Continuous Passive Motion (CPM) device used to mobilize knee and hip joints.

The CPM device is indicated in the treatment of most injuries and diseases of the knee and hip joints as well as in the postoperative treatment after knee and hip joint surgery. Examples:

Suitable for use in hospitals, clinics, general practices and rental services, it is an important supplement to medical and therapeutic treatment.

- joint distortion and contusion - arthrotomy and arthroscopy procedures in combination with synovectomy, arthrolysis or other intra-articular interventions

1.2 Therapy objectives

- mobilization of joints in anesthetized patients

CPM therapy with OptiFlex-K1 is mainly used to prevent the negative effects of immobilization, to allow patients to regain painless mobility of joints at an early stage and to promote healing and achieve a positive functional result. TM

- operative treatment of fractures, pseudoarthrosis and osteotomy - cruciate ligament replacement or reconstruction - endoprosthetic implant

Other objectives of therapy include:

1.4 Contraindications

- improvement of joint metabolism - prevention of joint stiffness

Do NOT use OptiFlex-K1TM on patients with:

- promotion of the regeneration and healing of cartilage and damaged ligaments - faster hematoma/fluid resorption

- acute inflammatory processes in the joints, unless on the order of a physician

- improved lymph and blood circulation

- spastic paralysis

- thrombosis and embolism prophylaxis

- unstable osteosynthesis

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English

1. How to use the CPM device

2. OptiFlex-K1TM description The motorized CPM device permits extension and flexion of the knee joint in the range of -10°/0°/120°, and of the hip joint in the range of 0°/7°/115°.

2.1 Description of the device components

It can be used on either side and requires no configuration change.

Note: Please see also page 2!

These are some of the outstanding OptiFlex-K1TM features:

1. Thigh length scale (femur length scale)

- anatomically correct setup

2. Thigh length fixation screws (femur length)

- physiological movements

3. Knee hinge

- programming unit for precise adjustment of patient-specific therapy parameters

4. Calf length fixation screws (tibia length)

- symbols for easy operation of the programming unit

5. Calf length scale (tibia length scale) 6. Footplate 7. Footplate angle fixation screw

Biocompatibility

8. Fixation screw to adjust footplate rotation and to remove the footplate

The parts of the OptiFlex-K1TM device that come in contact with the patient during the intended use, are designed to fulfill the biocompatibility requirements of the applicable standards.

9. Connection for programming unit 10. Connection for power cord 11. Fuse cap 12. Power switch (ON/OFF) 13. Nameplate 14. Programming unit

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2.2 Description of the programming unit

selected angle of the CPM device set extension value

set flexion value

selected direction of motion

Extension control

Flexion control

Speed control

Pause control

START/STOP key (during operation: LED green, when stopped: LED yellow)

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English

2.2.1 Programming unit in normal mode

2.2.2 Programming unit in speed or pause programming mode

set value of selected function (here: speed)

selected function

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2.3 Explanation of symbols

Symbols that may appear in the display

Extension (stretching the knee)

Go to start position (see Notes in 4.1)

Flexion (bending the knee)

Controls on programming unit locked (see Notes in 5.1)

Speed

Controls on programming unit unlocked (see Notes in 5.1)

Pause (extension and flexion)

Service menu activated, for service purposes only (also refer to Service Manual)

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Symbols on the programming unit:

2.4 Explanation of symbols (connections and nameplate)

Alternating current

Protective earth connection

Type B applied part

Power switch OFF

Power switch ON

Refer to accompanying documents

Do not dispose product with unsorted household or municipal waste.

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3. Safety information

Introduction and definitions

Safety information

Read the safety statements before use of the CPM device. The safety statements are classified as follows:

OptiFlex-K1TM is not designed for use in areas where an explosion hazard may occur. An explosion hazard may result from the use of flammable anesthetics, skin cleansing agents and disinfectants.

DANGER! Indicates an imminent hazard. If not avoided, this hazard will result in death or serious injury.

WARNING!

WARNING!

Indicates a hazard. If not avoided, this hazard can result in death or serious injury.

Patient hazard – - Only authorized individuals are allowed to operate the OptiFlex-K1TM device. Individuals are authorized after receiving training in the operation of the device and reading this operation manual.

CAUTION! Indicates a potential hazard. If not avoided, this hazard can result in minor personal injury and/or product/property damage.

- Before using the device, the operator must ascertain that it is in correct working order and operating condition. In particular, the cables and connectors must be checked for signs of damage. Damaged parts must be replaced immediately, with original spare parts. - Before therapy, a test run consisting of several exercise cycles must be completed, first without and then with the patient. Check that all fixation screws are tightened. - Stop therapy immediately, when you have doubts about the device settings and/or the therapy protocol.

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DANGER! Explosion hazard –

WARNING!

WARNING!

Patient hazard –

Shock hazard – Strictly observe the following warnings. Failure to do so endangers the lives of the patient, the user and other persons involved.

- It is important that the patient's position is anatomically correct. Therefore, carefully verify the following settings/positions:

- Allow OptiFlex-K1TM to reach room temperature before use. If the device has been transported at temperatures below 0 °C/ 30°F), leave it to dry at room temperature for about 2 hours, until any condensation has disappeared.

1. femur length 2. knee joint axis 3. tibia length and leg rotation 4. leg support assemblies - Movements must not cause pain or irritation.

- The OptiFlex-K1TM device must only be operated in dry rooms.

- Patients must be fully conscious while being instructed in the use of the CPM device and during therapy.

- When disconnecting the device from the power line, remove the plug from the wall outlet first, before disconnecting the cable from the device.

- Only the responsible physician or therapist is able and allowed to choose the therapy parameters to use. It is the physician's or therapist's decision whether or not to use the CPM device on a specific patient.

- When connecting the device to other equipment or when creating a medical system, check that the sum of leakage currents will not cause any hazard. Please contact ORMED, if you have questions in this matter.

- The patient must be familiar with the functions of the OptiFlex-K1TM programming unit and the unit must be within easy reach of the patient, allowing him or her to stop therapy, if needed. Patients unable to operate the programming unit, e.g. paralytic patients, must never be left unattended during therapy.

- Do not use multiple portable socket outlets (MPSO) to connect the device to the power line. OptiFlex-K1TM must be connected to a properly installed wall outlet with a non-fused earthed wire. Before connecting the power cord, it must be completely unrolled and placed such that it will not get caught by the moving parts of the device.

- Any accessories used with OptiFlex-K1TM must first be approved by ORMED. - Do not allow parts of the body or objects (such as blankets, cushions, or cables) to get caught in the moving parts of the CPM device.

- Before cleaning and service interventions, disconnect the device from the power line by removing the power cord from the wall outlet. - Liquids must not be allowed to enter the CPM device or the programming unit. If liquids have entered into the devices, OptiFlex-K1TM must be immediately checked by a service technician, before it can be reused.

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CAUTION! Equipment damage –

- Magnetic and electrical fields are capable of interfering with the proper performance of the device. For this reason make sure that all external devices operated in the vicinity of the CPM device comply with the relevant EMC requirements. X-ray equipment, MRI devices and radio systems are possible sources of interference as they may emit higher levels of electromagnetic radiation. Keep the CPM device away from these devices and verify its performance before use.

- Check that the voltage and frequency ratings of your local power line are those indicated on the nameplate. - The leg support element withstands a maximum continuous load of 20 kg (44,1 lb). - Do not allow any objects (such as blankets, cushions, or cables) to get caught in the moving parts of the CPM device. - Do not expose the OptiFlex-K1TM device to direct sunlight, because some of the components may reach inadmissibly high temperatures.

- Refer repair and maintenance to authorized persons. - Route all cables below the device frame to either side, ensuring that they cannot get caught by the moving parts during operation. - Inspect OptiFlex-K1TM for damage and loose connections at least once a year. Damaged and worn parts must immediately be replaced with original spare parts by authorized staff.

CAUTION! Preventing chafing and pressure sores – When your patient is adipose, very tall or very short, be sure to prevent chafing and pressure sores. Place the leg concerned in a moderate abduction position, if deemed appropriate.

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WARNING! Equipment malfunction –

4. Device setup Note: For a better understanding of each step, please see also pages 2 and 3.

OptiFlex-K1TM enters the home position (for home position values, refer to section 4.1), the device has passed the performance check.

4.1 Connecting the device, performance check

The device also runs performance checks regularly during operation. This is what happens, if a problem is identified: - An audio signal sounds. - The device switches off immediately. - The message “ERROR”, accompanied by a code number (e.g. ERROR 5), appears on the display.

1. Connect the power cord to socket (10) of the device and mains plug to a wall outlet with a non-fused earthed wire (100 to 240 Volt, 50/60 Hz).

In this situation, you may attempt to restart the device by turning the device briefly off and on again with the power switch. If the error message persists, have the device inspected by a Service technician, before using it again.

2. Turn the power switch (12) on. 3. Follow these steps to set the carriage to the home position. Press the Extension key

4.2 Adjusting the device to the femur length

and, holding it depressed, rotate until 30° appears in the display above the control.

1. Measure the length of the patient's thigh (femur) from the greater trochanter to the lateral knee joint cavity (Fig. A).

In the same manner, select a Flexion value of 35°.

2. Set the carriage to the home position (see 4.1).

Then press the START/STOP key.

3. Set the measured value at the femur scale (1) of the carriage.

When the carriage has reached this range and does not stop automatically, press the START/STOP key again to stop any movement.

- Loosen the two fixation screws (2). - Extend the scale (1) to the required length.

Note!

- Tighten the fixation screws (2) to set the scale to the new length.

OptiFlex-K1TM will stop automatically in the home position range, only if it was positioned outside this range (30° to 35°) at the time of programming (also refer to 5.2)

CAUTION! Equipment damage – Do not attempt to extend the femur scale beyond the stop.

Performance check If the programming unit can be operated as described above and 14

1. Set the leg support assemblies and the footplate (6) to the expected positions before accommodating the patient.

Symbol 2: Set the carriage to the home position (see 4.1) and adjust it to the measured femur length.

- Loosen fixation screws (4) to adjust the footplate (6) to the length of the patient's lower leg (Fig. C). Loosen fixation screw (8) and adapt the footplate's rotation to the patient (Fig. D).

Symbol 3: Adjust height of calf and thigh support assemblies. Adjust the footplate to the height and length of the lower leg.

Loosen fixation screw (7) and adapt the angle to the patient's foot (turn the screw a few revolutions until the footplate can be easily adjusted). For short patients you can reverse the footplate's bracket 180° (Fig. F) to adapt the footplate to shorter calves: • Loosen fixation screw (8) and remove the footplate (6). • Loosen the fixation screws (7). • Reverse the bracket 180°. • Screw the footplate to the bracket and tighten the fixation screw.

- Adjust the height of the support assemblies for calf and thigh. 2. Place the patient’s leg on the carriage and repeat the steps outlined under 1 above to adjust the device to the patient.

CAUTION! Patient hazard – Ensure that the rotational axes of the CPM device and of the knee joint coincide both in the vertical and in the horizontal plane (Fig. G).

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Symbol 1: Measurement of the patient's femur length from the greater trochanter to the knee joint cavity

4.3 Adapting the leg support assemblies/footplate

5. Setting the treatment values When adjusting speed or pause, the information shown in the display changes automatically as you press the control.

WARNING! Patient hazard – Before therapy, a test run consisting of several exercise cycles must be completed without the patient. Then repeat the test run with the patient and check that the movement does not cause any pain.

The selected parameter (speed or pause) is immediately represented by its symbol in a large format plus the current value (also refer to 2.2.2). The current value can be changed by turning the depressed control. When you have set the new value, release the control and the standard display reappears automatically after approx. 5 seconds (see also 2.2.1).

Note! See also 2.2 and 2.3 as well as page 3!

3. Subsequently press the START/STOP key to start therapy.

5.1 General information on programming OptiFlex-K1TM

Note! Refer to sections 5.2 for a description of the parameters. - To prevent accidental changes of the parameter settings, lock the programming unit by simultaneously pressing the "Extension" and "Speed" controls.

1. You activate a function by briefly pressing a control on the programming unit.

2. You select a treatment value by pressing the respective control and turning it in either direction.

Press both controls again to unlock.

You increase a value by turning the control clockwise towards the + (plus) symbol and you decrease a value by turning the control counterclockwise towards the - (minus) symbol.

- Emergency stop function: OptiFlex-K1TM will stop immediately, when any of the keys is pressed during therapy. Patient treatment can be resumed by pressing the START/STOP key. The device will automatically change the direction.

For the first 5° the values in the display change in steps of 1°, then the interval changes to 5° so that you reach the target value faster. During adjustment of the extension and flexion angles, the values in the display change as you turn the control after pressing it. 16

Note!

- If the carriage is positioned within the programmed range of motion at the time therapy begins, the therapy session will start immediately.

The programmed value and the value measured at the patient's knee may deviate slightly.

If the carriage is positioned outside the programmed range of motion at the time therapy starts, it will first enter the position “extension +10°”. The carriage will stop in this position and you can initiate the therapy session by pressing the START/STOP key again.

The speed can be adjusted between 5 % and 100 % in steps of 5 %. Default setting: 50 % ■ Pauses Pauses occur at the selected limits where stretching turns into bending and bending into stretching (selected extension and flexion values). The value entered applies to both extension and flexion pause.

5.2 Information about the OptiFlex-K1TM therapy parameters

Pauses can be set to any value between 0 and 59 seconds in steps of 1 second, and to values between 1 and 59 minutes in steps of 1 minute.

- You select a function by pressing the corresponding control

When selecting the seconds, the value changes in 1-second steps for the first five seconds. Subsequently the interval changes to 5-second steps.

- You change the treatment values by turning the depressed control. - You initiate the treatment session by pressing the START/STOP key

The minutes are always adjusted in 1-minute steps. Default setting: no pause

■ Extension (streching) - Maximum knee extension: -10 degrees - Maximum hip extension: 7 degrees ■ Flexion (bending) - Maximum knee flexion: 120 degrees - Maximum hip flexion: 115 degrees

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■ Speed

6. Care, maintenance, transport 6.1 Care

6.2 Maintenance (fuse replacement)

WARNING! Shock hazard – Check before each use Unplug the device from the power line before cleaning.

Visually inspect the device for signs of mechanical damage before each use.

Shock hazard, equipment damage – Liquids must not enter the device or the programming unit.

If you detect damage or malfunctions that may impair the safety of the patient or of the operator, have the device repaired before using it.

- OptiFlex-K1TM can be disinfected by wiping down with a disinfectant. Thus, it complies with the special hygiene standards for medical technical equipment.

Technical Inspections For safety, the devices require regular maintenance. To maintain the functional and operational safety, check all components for damage and loose connections at least once a year.

- The enclosure can be cleaned with commonly used disinfectants and mild household detergents.

These checks should be performed by persons with adequate training and experience. Damaged and worn parts must immediately be replaced with original spare parts by authorized staff.

- Use only a damp cloth to wipe the carriage down. Clean the sheath of the programming unit on a regular basis. Remove it from the programming unit before cleaning. Allow the sheath to dry before inserting the programming unit again.

The device does not require additional regular maintenance. Fuse replacement

CAUTION! Equipment damage –

WARNING! Patient hazard, equipment malfunction and damage –

- The plastic material used is not resistant to mineral acids, formic acid, phenols, cresols, oxidizing agents and strong organic or inorganic acids with a pH value below 4.

The replacement of fuses must be referred to specialists as defined in IEC 60364 or similar standards (e.g. biomedical technicians, electricians, electronics installers).

- Use only clear disinfectants to prevent discoloration of the device.

Fuses used must be T1A fuses.

- Do not expose the CPM device to strong ultraviolet radiation (sunlight) and fire.

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6.3 Transport

7. Environmental protection statement The product described in this operation manual must not be dispose of with unsorted household or municipal waste. It requires separate disposal. Please contact Chattanooga Group for information about the possible recycling of the product.

1. Adjust the femur length to 49 cm and the tibia length to 45 cm. 2. Set the carriage to 0° by pressing the START/STOP key when the carriage is in the 0° position. This will stop the carriage in that position 3. Push the power switch to turn off the OptiFlex-K1TM.

8. Specifications

4. Disconnect the power cord and the programming unit. Input ratings:

5. The device must be stored in its original shipping box for transport. Chattanooga Group cannot be held liable for damage in transit, if the original shipping box was not used. 6. Inser the programming unit into the space provided in the molded polystyrene pads and secure with adhesive tape. 7. Set the footplate to a horizontal position.

9. Place the power cord at the bottom of the box before inserting the OptiFlex-K1TM including the polystyrene pads. Programming Unit

Current consumption:

850 – 370 mA

Fuses:

2 x T1A

Protection class:

I

Applied part:

type B

Max. load on carriage:

20 kg (44,1 lb)

Dimensions length: width: height:

8. Now slide the polystyrene pads onto the OptiFlex-K1TM.

100 – 240 V AC/ 50 – 60 Hz

96 cm (37,8 In) 35 cm (13,7 In) min. 23 cm to max. 56 cm (9,0 In to 22,0 In)

Adjustment ranges (min./max.): Femur range: approx. 31 – 49 cm (12,2 In – 19,2 In)

Power Cord

Lower leg range:

approx. 25 – 57 cm (9,8 In – 22,4 In)

Weight:

11 kg (24,2 lb)

Materials used:

ABS, POM (Delrin 100), PUR, PA, FR4, aluminium, stainless steel, brass

MDD

class 2a

Standards compliance: IEC 60601-1:1988 + A1:1991 + A2:1995 Certification:

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ANSI/UL 60601-1 CAN/CSA C22.2 No. 601.1

English

Follow these steps to prepare the OptiFlex-K1TM for transport:

EMC (electromagnetic compatibility)

IEC 60601-1 2:2001

Ambient conditions (operation) temperature: +10 ºC to +40 ºC (50 °F to +104 °F)

Ambient conditions (storage, transport) temperature: -24 ºC to +60 ºC (-12 °F to +140 °F) relative humidity: atmospheric pressure:

relative humidity: atmospheric pressure:

30 % to 75% 700 hPa to 1060 hPa

20 % to 85 % Subject to change without notice. (08/06)

700 hPa to 1060 hPa

9. IEC 60601-1-2:2001 The OptiFlex-K1TM device is subject to particular precautions regarding electromagnetic compatibility (EMC). The device must be installed and put into service strictly in compliance with the EMC directives put forth in the accompanying documents.

OptiFlex-K1TM should not be used adjacent to or stacked with other equipment. If adjacent or stacked use is necessary, OptiFlex-K1TM should be observed to verify normal operation in the configuration in which it will be used.

Portable and mobile RF communication systems may affect the OptiFlex-K1TM device.

We can guarantee the specified electromagnetic emission and immunity data only if the manufacturer's original spare parts are used in repair and maintenance of the device.

9.1 Electromagnetic emissions Guidance and Manufacturer’s Declaration – Electromagnetic Emissions OptiFlex-K1TM is intended for use in the electromagnetic environment specified below. It is the responsibility of the customer or user to ensure that the OptiFlex-K1TM device is used in such an environment. Emissions test

Compliance

Electromagnetic environment – guidance

RF emissions to CISPR 11

Group 1

OptiFlex-K1TM uses 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 emissions to CISPR 11

Class B

OptiFlex-K1TM is suitable for use in all establishments, including domestic and those directly connected to the public low-voltage power supply network that supplies buildings used for domestic purposes.

Harmonic emissions to IEC 61000-3-2

not applicable

Voltage fluctuations/flicker emissions to IEC 61000-3-3

not applicable

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9.2 Electromagnetic immunity Guidance and Manufacturer’s Declaration – Electromagnetic Immunity

Electrostatic discharge (ESD) to IEC 61000-4-2 ± 6 kV contact

e 6 kV contact

e 6 kV contact

e 8 kV air

e 8 kV air

Electrical fast transi- e 2 kV for power ent/burst to IEC supply lines 61000-4-5 ± 2 kV for power supply lines e 1 kV for input/output lines

e 2 kV for power supply lines

e 1 kV differential mode

e 1 kV differential

e 2 kV common mode

e 2 kV common mode

Surges to IEC 61000-4-5

Voltage dips, short interruptions and voltage variations on power supply input lines to IEC 61000-4-11

Mains power should be that of a typical commercial or hospital environment.

e 1 kV for input/out-

put lines

mode

Mains power should be that of a typical commercial or hospital environment.

< 5 % UT (> 95 % dip in UT) for 5 s

Mains power should be that of a typical commercial or hospital environment. If the user of the OptiFlex-K1TM 40 % UT device requires continued (60 % dip in UT) for operation during power 5 cycle mains interruptions, it is recommended that the 70 % UT OptiFlex-K1TM device be (30 % dip in UT) for powered from an uninter25 cycles ruptible power supply or a battery. < 5 % UT (> 95 % dip in UT) for 5 s

3 A/m

3 A/m

< 5 % UT < 5 % UT (> 95 % dip in UT ) (> 95 % dip in UT ) for ) cycle for ) cycle 40 % UT (60 % dip in UT) for 5 cycle 70 % UT (30 % dip in UT) for 25 cycles

Power frequency (50/60 Hz) magnetic field to IEC 610004-8

Floors should be wood, concrete or ceramic tile. If floors are covered with synthetic material, the relative humidity should be at least 30%.

Power frequency magnetic fields should be at levels characteristics of a typical location in a typical commercial or hospital environment. Portable and mobile RF communications equipment are used no closer to any part of the OptiFlex-K1TM device, including cables, than the recommended separation distance calculated from the equation applicable to the frequency of the transmitter.

NOTE: UT is the a.c. mains voltage prior to application of the test level.

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OptiFlex-K1TM is intended for use in the electromagnetic environment specified below. It is the responsibility of the customer or user to ensure that the OptiFlex-K1TM device is used in such an environment. IEC 60601-test Compliance level Electromagnetic Immunity test level environment - guidance

Guidance and Manufacturer’s Declaration – Electromagnetic Immunity OptiFlex-K1TM is intended for use in the electromagnetic environment specified below. It is the responsibility of the customer or user to ensure that the OptiFlex-K1TM device is used in such an environment. Immunity test

IEC 60601 test level

Compliance level

Electromagnetic environment-guidance Recommended separation distance:

Conducted RF to IEC 61000-4-6

3 Vrms 150 kHz to 80 MHz

3 Vrms

Radiated RF to IEC 61000-4-3

3 V/m 80 MHz to 2.5 GHz

3 V/m

r

d = 1.2

öP

d = 1.2 800 MHz

öP 80 MHz to

d = 2.3 2.5 GHz

r

r

öP 800 MHz to

where P is the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer andd is the recommended separation distance in meters (m). Field strengths from fixed RF transmitters, as determined by an electromagnetic site survey a, is less than the compliance level in each frequency rangeb. Interference may occur in the vicinity of equipment marked with the following symbol

NOTE 1: At 80 MHz and 800 MHz, the higher frequency range applies. NOTE 2: 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 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. If the measured field strength in the location in which the OptiFlex-K1TM device is used exceeds the applicable RF compliance level above, the OptiFlex-K1TM device should be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the OptiFlex-K1TM device. b) Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.

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