3M Bair Hugger 675 Service Manual Download

Page: 18 / 332

3M™ Bair Hugger Model 675 Warming Unit – Service Manual

Recommended separation distances between portable and mobile RF communications equipment and the model 675

The model 675 is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of the model 675 can help

prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the model 675 as
recommended below, according to the maximum output power of the communications equipment.

Rated maximum output

power of transmitter

Separation distance according to frequency of transmitter (m)

150 kHz to 80 MHz

d = 1.2

80 MHz to 800MHz

d = 1.2

800 MHz to 2,5 GHz

d = 2.3

0,01

0.12

0.23

0,1

0.38

0.73

1.2

2.3

3.8

7.3

100

For transmitters rated at a maximum output power not listed above, the recommended separation distance

in meters (m) can be estimated using the equation applicable to

the frequency of the transmitter, where

is the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer.

Notes

At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures, objects and people.

MEDICAL — GENERAL MEDICAL EQUIPMENT AS TO ELECTRICAL

SHOCK, FIRE AND MECHANICAL HAZARDS ONLY IN

ACCORDANCE WITH ANSI/AAMI ES60601-1 (2005) + AMD 1 (2012)

and IEC 80601-2-35; CAN/CSA-C22.2 No. 60601-1 (2014) and CAN/

CSA-C22.2 No. 80601-2-35; Control No.4HZ8

Classified under IEC 60601-1 Guidelines (and other national versions of the
Guidelines) as: Class I equipment; Type BF applied part (warming blanket/gown is the
applied part); Protection against harmful ingress of water: IPX1; Continuous operation;
Not suitable for use in the presence of flammable anesthetic mixtures with air or with
oxygen or nitrous oxide.

Frequently Asked Questions (FAQ) on Filtration

What filter is used in the 3M™ Bair Hugger™ Model 675 warming unit?

The Model 675 uses the same filter media as has for many years been used in prior Bair Hugger 700-series models. That filter media is classified on an industry-standard scale
as MERV 14 at 44 CFM (cubic feet per minute) under ASHRAE Standard 52.2-2012: Method of Testing General Air Ventilation Air-Cleaning Devices for Removal Efficiency by

Particle Size.

1,2

What is a MERV rating?

The Minimum Efficiency Reporting Value, or MERV, is a measurement scale to rate the efficiency of an air filter as a function of particle size based on the ASHRAE

Standard 52.2-2012.

1,2

What is the MERV rating recommended for operating rooms?

ASHRAE Standard 170-2013, Ventilation of Health Care Facilities, provides standards and guidance on the design requirements for ventilation systems utilized in health care

facilities.

The standard recommends that operating rooms utilize a filter that is equivalent to MERV 14.

This MERV rating is specific to the ventilation system in the hospital’s

operating room.

What is the MERV rating recommended for patient warming devices in the operating room?

There is no filtration standard for patient warming devices utilized within the operating room. The ASHRAE Standard is a standard used to assess filter efficiency in health care

ventilation systems.

Is a HEPA filter necessary?

No. We are not aware of any evidence or claim demonstrating that a HEPA filter improves patient safety.

What is the ASHRAE 52.2-2012 standard?

The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) is a global organization focused on research, education and standards for heating,

ventilation, air conditioning and refrigeration. The ASHRAE standard 52.2-2012

1,2

provides test methods for air intake filters to ensure standardization in classification and

efficiency. For more information on ASHRAE, please visit www.ashrae.org.

References:

1. ANSI/ASHRAE Standard 52.2-2012: Method of Testing General Air Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size. The American Society of Heating,

2. ANSI/ASHRAE Addenda a, b, and d to ANSI/ASHRAE Standard 52.2-2012. Method of Testing General Air Ventilation Air-Cleaning Devices for Removal Efficiency by Particle

on 6/7/2016.

3. ANSI/ASHRAE/ASHE Standard 170-2013: Ventilation of Health Care Facilities. The American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. ASHRAE.

ISSN 1041-2336. Available at http://www.ashrae.org. Accessed on 6/7/2016.

Maintenance Checklist

□ Filter inspection

1. Remove and inspect the filter.
2. Return filter or replace as necessary.

Note: Replace every 12 months or 500 hours of use.

□ Test the alarm function
□ Calibrate the operating temperature
□ Test the over temperature detection system