HOTDOG WC0x Patient Warming System Controller User Manual

Patient Warming System
Controller Models WC0x
User Manual

INTRODUCTION

Device Description
The HotDog Patient Warming System consists of the HotDog Controller, reusable warming devices (e.g., Warming Blankets) and accessories. This manual includes aintenance instructions and specifications for the HotDog Controller Models WC0X. For information about HotDog warming devices and accessories, refer to the “User  Manual” provided with each device/accessory.
The HotDog Controller is designed to help maintain normothermia in patients before, during, and after surgical procedures and to help prevent unintended hypothermia.  The system is powered and controlled by an electronic control unit. Warming devices (e.g., blankets) are powered at low voltage, ensuring safety for patients and operators.  Warming temperatures are controlled automatically to user-selected levels, and over-temperature safety shut-offs are integrated into the controller as well as into each warming device.
The HotDog Controller can be placed on a flat surface, mounted on an IV pole, or suspended from the OR table/gurney rail using optional hooks. The HotDog Patient  Warming System can be operated continuously to maintain uniform heat over the patient. It is the responsibility of the user to determine whether warming is appropriate for  each individual patient. The HotDog Patient Warming System should not be used when clinical considerations indicate that warming of the patient is not advisable.
Indications for Use
The HotDog Patient Warming System is intended to prevent or treat hypothermia and to provide warmth to patients. The HotDog Patient Warming System should be used  in circumstances in which patients may not maintain a state of normothermia. The System is intended primarily for use in hospitals and surgical centers including, without  limitation, operating, recovery, and emergency rooms and on medical/surgical floors.

Contraindications

• DO NOT warm ischemic or non-perfused tissue; thermal injury may result. Examples include tissue distal to aortic cross clamping, or when vasoconstrictive drugs would  lead to severe, prolonged vasoconstriction.
• DO NOT warm patients receiving transdermal medication; increased drug delivery may occur.

WARNINGS

General

• EXPLOSION HAZARD – DO NOT use the HotDog Patient Warming System in the presence of flammable anesthetics or highly oxygen-enriched environments such  as hyperbaric chambers, oxygen tents, etc.
• Inspect HotDog components prior to use for signs of damage or excessive wear such as cuts, holes, or loose electrical connections. If signs of wear are evident, do not  use the product until it is inspected by technical staff.
• DO NOT continue to use the HotDog Patient Warming System if the over temperature indicator and/or alarm continue to sound after reset. Refer to the “Alarm”  section of this manual for more information.

Warming Blanket

• DO NOT place HotDog Warming Blankets under the patient. The Warming Mattress and disposable sheets are the only accessories designed for use under the patient.
• DO NOT continue to use HotDog Warming Blankets beyond the labeled expiration date.

Accessories and Other Equipment

• Accessories and cables other than those specified in the User Manual may result in increased emissions or decreased immunity of the HotDog Patient Warming system.
• The HotDog Patient Warming System should not be used adjacent to or stacked with other equipment. If adjacent or stacked use is necessary, carefully observe the HotDog Patient Warming System to verify that it operates normally in this non-recommended configuration.

CAUTIONS
Federal law (USA) restricts this device to sale by or on the order of a licensed healthcare professional.
PRECAUTIONS

• Use under the direct supervision of a clinician.
• Monitor the patient’s vital signs regularly during warming according to institutional protocol. If vital sign instability occurs, notify the clinician.
• Care should be taken when using multiple warming methods.
• Dispose of the Controller per local regulations. Follow Warming Blanket and Mattress User Manuals for proper disposal.
• The risk of skin irritation caused by pooling of surgical prep solutions under the patient may increase with warming; ensure that surgical prep solution instructions for use are followed.

PROPER USE AND MAINTENANCE

• DO NOT continue to use HotDog Warming Blankets beyond the labeled expiration date.
  Do not open the HotDog Controller. There are no user serviceable parts. If service is required, contact Technical Support (see page 12). The manufacturer assumes no  responsibility for the reliability, performance, or safety of the HotDog Patient Warming System if the following events occur:

• The Controller is disassembled or serviced by an unauthorized person.

• The patient warming system components are used in a manner other than described in the User Manuals.

• The Controller is installed in an environment that does not meet the appropriate electrical and grounding requirements.

• The Controller is grounded and should not be attached to an un-grounded table intended for use with a hyfrecator or equivalent devices.

INITIAL SETUP & ASSEMBLY

Contents
The following components are included in the HotDog Controller box:

• 1—HotDog Controller (Model WC0X)
• 1—IV pole adapter and mounting hardware
• 1—Mains power cord
• 1—CD containing User Manual and Service Manual
• 1—HotDog Warming Blanket Cable (P/N A101)

Reusable HotDog accessories (e.g., Warming Blankets, Warming Mattress, connecting cables, OR table/gurney rail hooks with mounting hardware) and HotDog Disposable Sheets are sold separately.
Mounting the HotDog Controller to an IV Pole
To mount the HotDog Controller to an IV pole, place the Controller IV pole adapter around the IV pole and turn the clamp handle clockwise until securely tightened (Figure 1). To remove the Controller from the IV pole, turn the clamp handle counterclockwise until the unit releases.
Caution

To prevent the IV pole from tipping, the Controller must be attached at a height that provides stability. It is recommended to use an IV pole with a minimum wheelbase  radius of 35.6 cm (14 in) and to mount the Controller no higher than 112 cm (44 in) from the floor. Failure to properly mount the Controller may result in IV pole tipping, catheter site trauma, and patient injury.

Figure 1: HotDog Controller Mounted on an IV Pole

The Controller may also be suspended from the OR table/gurney rail using optional hooks (Figure 2).
Figure 2: Optional OR Table/Gurney Rail Hooks Control Panel Features & Operating Modes

Figure 3: HotDog Model WC0X Controls

A—Mains Power ON Light
B—Temp in Range Light
C—Temp Adjust Button
D—Temp Setting Lights (3)
E—Alarm Port A Light
F—Alarm Port B Light
G—Port A (Warming Blanket)
H—Port B (Auxiliary)
I—Serial Number
J-1V Pole Clamp
K—Power Entry Module
-Fuse Drawer
-Mains Power Switch
-Power Plug
L—Cord Retainer

Mains Power Switch / ON Power Indicator
When the HotDog Controller is plugged into an electrical outlet and the Mains Power Switch on the back of the Controller is turned ON, all displays will illuminate briefly  and the Controller will beep. The Mains Power ON Light will illuminate and the Controller will remain idle until a warming device is plugged in. When the unit is ON and  idle (i.e., no Temperature Setting Lights are illuminated), no power is applied to the warming device and no alarm conditions are indicated.
Temperature Adjust Button / Temperature Setting Lights
Press the Temperature Adjust Button until the desired high (43°C), medium (40°C), or low (37°C) temperature is selected, as indicated by the illuminated Temperature Setting  light. The designated warming temperature will be reached within 5 minutes.
Temp in Range Light
The green Temperature in Range light will illuminate when the temperature of the Warming Blanket is ± 1°C of the selected temperature setting.
Port A
Port A should only be used for connection to a HotDog Warming Blanket. When a Warming Blanket is plugged into the Controller, an audible beep indicates that the control  and over temperature sensors (safety device) are present and functioning properly and the device is ready for use.
Port B
Port B is a 48V output for future approved HotDog accessories.

Alarms

Alarm Port A
If the Warming Blanket temperature exceeds one degree above set point or other fault conditions exist, an audible alarm sounds and the Alarm Port A Light illuminates  Yellow. The Controller will automatically discontinue power to the Warming Blanket. If the Alarm Light stays illuminated and the alarm continues to sound, disconnect the  warming device from the Controller to silence the alarm. If the controller alarms again after a reset was performed, discontinue use and refer the Controller to biomedical  engineering for evaluation.

• If Alarm occurs when connecting a Warming Blanket to the Controller, disconnect the Warming Blanket and replace it with another Warming Blanket.

Alarm Port B
If the accessory attached to Port B exceeds the pre-set current limit, an audible alarm sounds and the Alarm Port B Light illuminates Yellow. Power is removed from the port.  Disconnect the accessory from Port B to reset the alarm.

• If Alarm Port B occurs when connecting an accessory to the Controller, disconnect the accessory and replace it with another accessory.
• If Alarm Port B occurs during use and the Alarm Port B Light illuminates steadily, disconnect the accessory and replace with another accessory.

Time out timer

• The time to reach the set-point temperature from 23 C +/-2 C is less than 10 minutes. If warming device does not reach set temperature within 10 minutes the controller will alarm

Note: If the controller is left on for more than 6 hours, the power to the heater is automatically turned off. This is indicated by 3 audible beeps after which the alarm LED  will flash continuously. Pushing the temperature select button once will clear this alarm condition and power to the heater will resume. Refer to the Service Manual for troubleshooting procedures.

INSTRUCTIONS FOR USE

The instructions below describe how to operate the Controller Models WC0X. For information about HotDog warming devices and accessories, refer to the User Manual  provided with each device/accessory.

1. Mount the HotDog Controller on an IV pole or the OR table/gurney rail (refer to page 5), or place the device on a flat, horizontal surface.

2. Insert the HotDog Controller power plug into a properly grounded hospital grade electrical outlet.
   WARNING: To avoid risk of electric shock, this equipment must only be connected to a supply mains with protective earth ground.
   Note: The Controller is grounded and should not be attached to un-grounded tables intended for use with a hyfrecator or equivalent devices.

3. Turn the Mains Power Switch to ON and ensure that the green Mains Power ON Light stays illuminated after the start up sequence.

4. Position and secure the HotDog warming device (e.g., Warming Blanket) following instructions in the User Manual provided with the device.

5. Insert the warming device connecting cable into the proper port on the Controller.
   Controller Port| Warming Device
   ---|---
   A| Warming Blanket
   B| HotDog accessories

Note: When the connecting cable is inserted into the Controller, an audible beep indicates that the control sensor and over temperature thermistor are present and functioning properly.

6. Press the Temperature Adjust button until the desired high (43°C), medium (40°C), or low (37°C) temperature is set, as indicated by the Temperature Setting light. The  designated warming temperature will be reached within 3 to 5 minutes, as indicated by illumination of  the green Temperature in Range light.
7. Monitor the patient’s temperature regularly. Adjust the temperature setting of the HotDog Controller as necessary to maintain the desired patient temperature.
8. When patient warming therapy is complete, turn the Mains Power Switch to OFF.
9. After use, disconnect the HotDog Controller from the electrical outlet.
10. Discard disposable accessories following standard hospital procedure. Clean the reusable warming device as instructed in the User Manual provided with the device.

MAINTENANCE & TESTING

Testing of Indicator Light Function
Frequency
This test should be completed upon initial equipment check-in and once every 12 months (or more frequently if required by hospital guidelines).
Method

1. Insert the HotDog Controller power plug into a properly grounded hospital grade electrical outlet and confirm that NO cables or devices are connected to any of the ports.

2. Turn the Mains Power Switch to ON and observe for the following proper start-up sequence:
   a. All lights illuminate briefly.
   b. The Mains Power ON light remains illuminated while the other lights illuminate one by one in the following order:
   1. Temperature in Range
   2. Alarm A
   3. Alarm B
   4. 43°
   5. 40°
   6. 37°
   c. All of the lights will illuminate simultaneously, and then the unit will emit an audible tone.
   d. After the sequence completes, only the Mains Power ON Light remains illuminated.

3. If this sequence varies or is incomplete, contact Technical Support (see page 12).

Cleaning—General

Warnings

• DO NOT use a dripping wet cloth and DO NOT immerse HotDog components in liquid. Moisture will damage the components, and thermal injury may result.
  Precautions

• DO NOT use pure harsh solvents (e.g., MEK, acetone, etc.) to clean HotDog components. Solvents may damage plastic parts, labeling and product finish.

• DO NOT use high-level disinfectants (e.g., gluteraldehyde, peracetic acid). The U.S. Centers for Disease Control (CDC) recommends against the use of high level  disinfectants for cleaning environmental surfaces that may contact the patient since the chemicals are highly toxic.

• DO NOT spray cleaning solutions into electrical connectors.

Recommended cleaners
Alcohol-based disinfectants are easiest to use since they are fast-acting and can be either sprayed or wiped on. The following list of alcohol-based cleaners is provided for  reference only and is not an endorsement of the manufacturers or their cleaning products: Ecolab (Incidin Liquid, Incides N, Incidin Foam, Incidin Sun, Mikro-Bak  III), Merz (Pursept-A Xpress, Pursept Foam, Mucocit-A Economy) and Lysoform (Aerodesin 2000, Lysoform Spray).
Other cleaners that have been tested and are compatible with the outer surfaces of HotDog components include sodium hypochlorite (diluted bleach), phenolic  germicidal detergent quaternary ammonium detergent.
Cleaners that contain iodine may cause surface discoloration and are therefore NOT recommended for routine cleaning.

Cleaning—Controller
Frequency
As needed
Tools/Equipment

• Sponge or soft cloth
• Mild detergent or anti-microbial spray
• Dry soft cloth

Method

1. Disconnect the Controller from the power source before cleaning.
2. Wipe unit with moistened sponge or soft cloth; avoid pushing fluids into any openings.
3. Dry with a separate soft cloth.

Cleaning—Warming Devices
Frequency
Clean between patient use and when the warming device appears soiled.
Method
Clean the warming devices following protocols for non-critical medical devices that may contact intact skin. Examples of similar devices are blood pressure cuffs, exam table  covers, operating room table pads and surgical supports. Cleaning steps are described in the User Manual provided with the warming device. Note that the cleaning  instructions are general recommendations and are not meant to replace hospital-specific cleaning protocols.

TECHNICAL SUPPORT & CUSTOMER SERVICE
Please have the serial number of your HotDog Controller when you call for technical support. The serial number is located on the back of the Controller. If it is necessary to  return the Controller for service or repair, contact your local supplier or sales representative.

Augustine Temperature Management
6581 City West Parkway
Eden Prairie, MN 55344 USA
TEL 952.465.3500
FAX 952.465.3501
www.hotdogwarming.com

DEFINITION OF PRODUCT SYMBOLS

| Do Not Place Under Patient| | This Side Up| | Mains Power On Indicato
---|---|---|---|---|---
| This Side Down| | Heating Area| | Alarm
| Attention, consult accompanying documents| | Reference Number| | Lot Number
| BF Patient Applied Part according to IEC60601-1.| | Serial Number| | Manufacture Date
| Temperature in Range| | Transport and storage temperature range| | Temperature Adjustment
| Keep Dry| | Transport and storage humidity range| | Fuse
| Equipotential| | Medical Device restricted to sale by or on the order of a physician| | Return to Authorized Representative
| Temperature Sensor| | Do not use after YYYY-MM-DD| | Manufacturer
| See IFU for Warnings| | Medical Device| | See electronic IFU on website at URL provided
| EU Authorized Representative| | | |
**IPX2| ** Protected against dripping water when tilted up to 15°; Vertically dripping water shall have no harmful effect when the enclosure is tilted at an angle up to 15° from its normal position. (The Controller)
|
| Medical Equipment Classified by Intertek Testing Services NA Inc. with respect to electric shock, fire, and mechanical hazards only, in accordance with UL 60601-1. Classified under the Medical Device Directive (93/42/EEC) as a Class IIb device.

ACCESSORY PART NUMBERS

The following cable part numbers are used with the HotDog Patient Warming System:

SPECIFICATIONS

Physical Characteristics

Dimensions| 29.21 cm high x 13.97 cm deep x 19.69 cm wide 11.5” high x 5.5” deep x 7.75” wide
Weight| 3.6 kg (8.0 lb)
Mounting| Can be clamped to an IV pole
Temperature Characteristics
Recommended Operating Environment| 15°C to 25°C
Temperature Control| Micro-processor
Operating Temperatures| Average temperature at the Warming Blanket:
High             43° + 1.0°C            109.4° + 1.8°F
Medium      40° + 1.0°C            104° + 1.8°F
Low              37° + 1.0°C            98.6° + 1.8°F
Safety System
Auditory Alarms| Minimum SPL of 65 dB(A) at 3m (from front of controller) with a back ground SPL not to exceed 55dB(A)
Primary Over-temp Alarm| High-Alarm sounds at 44°C + 1°C
Secondary Over-temp Alarm| Independent electronic circuit shuts the heater off if the Warming Blanket temperature reaches 46°C + 1°C.
Time to reach temperature from 23 C +/-2 C| Less than 10 minutes
Time out timer| If warming device does not reach set temperature within 10 minutes the controller will alarm
Six hour timer| If a warming device is left at a steady setting for six hours the controller will discontinue power to warming device.
Over-current Monitoring
–    Port A
–    Port B| 12 amps max.
1.7 amps max.
Over-current Protection| Dual input fused lines.
Electrical Characteristics

Leakage Current| Meets UL 2601-1 and IEC 60601-1 requirements for Class I, Type BF equipment.
Power Consumption| Peak 580 W
Power Cord| 4.6 m (15 ft.)
Device Ratings| Input: 100-240 VAC, 50/60 Hz, 600VA
Output A: 48 VDC, 500 VA Max Output B: 48 VDC, 80 VA Max
Fuses| T6.3AL250V (2 x 5x20mm)
Certifications| IEC 60601-1; EN 60601-1-2; UL 60601-1; CAN/CSA-C22.2, No. 601.1, EN 55011
SPECIFICATIONS (cont’d)
Classification| Classified under IEC 60601-1 Guidelines (and other national versions of the Guidelines) as Class I, Type BF, Ordinary equipment, Continuous operation. Not suitable for use in presence of flammable anesthetic mixtures with air or with oxygen or nitrous oxide. Classified by Intertek Testing Services NA Inc. with respect to electric shock, fire, and mechanical hazards only, in accordance with UL 60601-1. Classified under the Medical Device Directive (93/42/EEC) as a Class IIb device.
Classified under Canadian Medical Device Regulation as Class II.
Diagnostics| A qualified technician can perform general system testing. The Controller has no user serviceable parts.
Transport/Storage| Temperature: -20°C to 60°C Humidity: 20% to 80% Keep Dry
Important Information| This device complies with the EMC requirements according to IEC 60601-1-2. Radio transmitting equipment, cellular phones, etc. shall not be used in the close proximity of the device since this could influence the performances of the device. Particular precaution must be considered during use of strong emission sources such as High Frequency surgical equipment and similar so that, e.g., the HF-cables are not routed on or near the device. If in doubt, contact a qualified technician or your local

ELECTROMAGNETIC COMPATIBILITY (EMC)

The HotDog Patient Warming System requires special precautions regarding EMC and must be installed and put into service according to the EMC information provided in this User Manual.
Warning

• Use of accessories and cables other than those specified may result in increased emissions or decreased immunity of the HotDog Patient Warming System.
• The HotDog Patient Warming System should not be used adjacent to or stacked with other equipment. If adjacent or stacked use is necessary, carefully observe the  HotDog Patient Warming System to verify that it operates normally in this configuration.

Guidance and Manufacturer’s Declaration – Electromagnetic Emissions

The HotDog™ Patient Warming System is intended for use in the electromagnetic environment specified below. The customer or user of the HotDog Patient Warming System should assure that it is used in such an environment.
Emissions test| Compliance| Electromagnetic Environment – Guidance
RF emissions, CISPR 11| Group 1| The HotDog Patient Warming System 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, CISPR 11| Class A| The HotDog Patient Warming System is suitable for use in all establishments other than domestic and those directly connected to the public low-voltage power 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
Guidance and Manufacturer’s Declaration – Electromagnetic Immunity

The HotDog™ Patient Warming System is intended for use in the electromagnetic environment specified below. The customer or the user of the HotDog Patient Warming System 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 floors 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| ±2 kV for power supply lines
±1 kV for input/output 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 line(s) to line(s)
±2 kV line(s) to earth| Mains power quality should be that of a typical commercial or hospital environment.
Voltage dips, short interruptions and voltage  variations on power supply input lines IEC 61000-4-11| <5 % U T
(>95 % dip in U T) for 0,5 cycle
40 % U T
(60 % dip in U T) for 5 cycles
70 % U T
(30 % dip in U T) for 25 cycles
<5 % U T
(>95 % dip in U T) for 5 sec| <5 % U T
(>95 % dip in U T) for 0,5 cycle
40 % U T
(60 % dip in U T) for 5 cycles
70 % U T
(30 % dip in U T) for 25 cycles
<5 % U T
(>95 % dip in U T) for 5 sec| Mains power quality should be that of a typical commercial or hospital environment. If the user of the HotDog Patient Warming System requires continued operation during power mains interruptions, it is recommended that the HotDog Patient Warming System be powered from an uninterruptible power supply or a battery.
Power frequency 50/60 Hz) 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 U T is the a.c. mains voltage prior to application of the test level.
Guidance and Manufacturer’s Declaration – Electromagnetic Immunity (cont’d)

The HotDog™ Patient Warming System is intended for use in the electromagnetic environment specified below. The

customer or the user of the HotDog Patient Warming System should assure that it is used in such an environment.

Immunity Test| IEC 60601 Test Level| **Compliance Level| Electromagnetic Environment –  Guidance**
Conducted RF

IEC 61000-4-6
Radiated RF IEC 61000-4-3

| 3 Vrms
150 kHz to 80 MHz
10 V/m 80 MHz to 2,5 GHz| 3 V  ****

10 V/m

| Portable and mobile RF communications equipment should be used no closer to any part of the HotDog Patient Warming System, including cables, than the recommended separation distance calculated from the equation applicable to the frequency of the transmitter.
Recommended separation distance d = 1,2 P
d = 0,35 P      80 MHz to 800 MHz
d = 0,7   P      800 MHz to 2,5 GHz
where P is the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer and d is the recommended separation distance in metres (m). Field strengths from fixed RF transmitters, as determined by an electromagnetic site survey,a should be less than the compliance level in each frequency range.b
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 radios, amateur 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 HotDog Patient Warming System is used exceeds the applicable RF compliance level above, the HotDog Patient Warming System should be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the HotDog Patient Warming System.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.

Recommended separation distances between portable and mobile RF communications equipment and the HotDog Patient Warming System

The HotDogTM Patient Warming System is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of the HotDog Patient Warming System can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the HotDog Patient Warming System as recommended below, according to the maximum output power of the communications equipment.

Rated maximum output power of transmitter
W

|

Separation distance according to frequency of transmitter
m

150 kHz to 80 MHz
d = 1,2 P| 80 MHz to 800 MHz
d = 0,35 P| 800 MHz to 2,5 GHz
d = 0,7 P
0,01| 0,12| 0,04| 0,07
0,1| 0,37| 0,11| 0,22
1| 1,2| 0,35| 0,70
10| 3,7| 1,1| 2,2
100| 12| 3,5| 7,0

For transmitters rated at a maximum output power not listed above, the recommended separation distance d in metres (m) can be estimated using the equation applicable to the frequency of the transmitter, where P is the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer.
NOTE 1 At 80 MHz and 800 MHz, the separation distance for 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.

Manufactured by:
Augustine Temperature Management
6581 City West Parkway
Eden Prairie, MN 55344 USA
TEL 952.465.3500
FAX 952.465.3501
www.hotdogwarming.com
**EU Authorized Representative:

TEL (31) (0) 70 345-8570
FAX (31) (0) 70 346-7299
**HotDog is a trademark of Augustine Temperature Management, registered in the U.S.
Patent & Trademark Office. Patents pending.
© 2020 Augustine Temperature Management.
All rights reserved.
P/N 2293EN Revision G (11/2020)

References

• HotDog® Patient Warming System - Air-Free, Better Warming
• hotdogwarming.com/

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