3M Bair Hugger 675 - Filtration and References; Filtration FAQ; Maintenance Checklist

14 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
W
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 0.12 0.23
0,1 0.38 0.38 0.73
1 1.2 1.2 2.3
10 3.8 3.8 7.3
100 12 12 23
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters (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.
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.
3
The standard recommends that operating rooms utilize a filter that is equivalent to MERV 14.
3
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,
Refrigerating and Air-Conditioning Engineers, Inc. © 2012ASHRAE. ISSN 1041-2336. Available at http://www.ashrae.org. Accessed on6/7/2016.
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
Size. The American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. © 2015ASHRAE. ISSN 1041-2336. Available at http://www.ashrae.org. Accessed
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