3M Bair Hugger 775 - Certifications, Diagnostics, and Maintenance Schedule; Certifications, Classifications, and Diagnostics; Maintenance Checklist Items

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3M™ Bair Hugger™ Warming Unit Model 775 – Service Manual
Guidance and manufacturer’s declaration – electromagnetic immunity
The Model 775warming unit is intended for use in the electromagnetic environment specified below. The customer or the user of the Model
775warming 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
3V/m
80MHz to 2,5 GHz
3Vrms
3V/m
Portable and mobile RF communications equipment should be used no closer to
any part of the Model 775warming unit, including cables, than the recommended
separation distance calculated from the equation applicable to the frequency of
the transmitter.
Recommended separationdistance
d = 1.2
d=1.2 80 MHz to 800MHz
d=2.3
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
meters(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 Model 775warming unit
is used exceeds the applicable RF compliance level above, the Model 775warming unit should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as re-orienting or relocating the Model 775warmingunit.
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 Model 775 warmingunit
The Model 775warming unit is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or
the user of the Model 775warming unit can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile
RF communications equipment (transmitters) and the Model 775warming unit 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.
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.
15
GB / 34-8718-8817-7
PhysicalCharacteristics
DIMENSIONS
13” high x 13” deep x 14” wide (33cm high x 33 cm deep x 36cm wide)
WEIGHT
16lb(7.3kg)
RELATIVE NOISELEVEL
53 dBA (High fan setting)
48dBA (Low fansetting)
HOSE
Flexible, compatible with the Model 241blood/fluid warmingset.
Length: 80” (203 cm)
UNIT INTAKEFILTER
MERV 14*
* See Frequently Asked Questions on Filtration (p. 58)
RECOMMENDED FILTERCHANGE
Every 12 months or 500hours ofuse
MOUNTING
Can be clamped to an IV pole, placed on a hard surface, bed rail mount, or
mounted to the rolling cartaccessory.
Temperature Characteristics
RECOMMENDED OPERATINGENVIRONMENT
TEMPERATURE:
15°C-25°C
HUMIDITY:
Max relative humidity 80% (up to 31°C) decreasing linearly to 50% relative
humidity at40°C.
ALTITUDE:
Max2,000m
TEMPERATURECONTROL
Electronicallycontrolled.
HEATGENERATED
High fansetting:
1600BTU/hr (average), 470W(average)
Low fansetting:
1330BTU/hr (average), 390 W (average)
OPERATINGTEMPERATURES
Average temperatures at the end of thehose:
HIGH: 43° ± 1.5°C (109.4° ±2.7°F)
MED: 38° ± 1.5°C (100.4° ±2.7°F)
LOW: 32° ± 1.5°C (89.6° ±2.7°F)
TIME TO REACH OPERATING TEMPERATURE
2 - 5 minutes (dependent on blanket model)
Time required for the contact surface temperature to heat up from 23 ± 2°C
to 37°C (73± 2°F to 99°F).
STORAGE/TRANSPORTTEMPERATURE
-20°C to 45°C (-4°F to 113°F)
Store all components in a cool, dry place when not in use.
SAFETY SYSTEM
THERMOSTAT
Independent electronic circuit; thermal cutoff shuts the heater
OFF to ensure hose end air remains below 46°C to 56°C; back-up
over-temperature detection at hose inlet.
ALARM SYSTEM
Over-temperature (46°C to 56°C): red Over‑temp indicator light flashes,
alarm sounds, heater and blower shut down, operating indicator lights
turn OFF, and the user can no longer adjust the warming unit using the
control panel.
FAULT:
Fault indicator light flashes, alarmsounds.
OVERCURRENT PROTECTION
Dual input fusedlines.
ElectricalCharacteristics
HEATINGELEMENT
1400WResistive
LEAKAGECURRENT
Meets UL 60601-1and IEC 60601-1 requirements.
BLOWERMOTOR
OPERATING SPEED:
4,700rpm (high fansetting)
4,100 rpm (low fansetting)
AIRFLOW:
Up to 48cfm or 23 L/s
POWERCONSUMPTION
Peak: 1550W
Average: 800W
POWER CORD
15 ft., SJT, 3cond., 13A
15 ft., SJT, 3cond., 15A
4.6m, HAR, 3cond., 10A
DEVICERATINGS
110-120VAC, 50/60Hz, 11.7 A, or
220-240 VAC, 50/60 Hz, 7.2A,or
100VAC, 50/60 Hz, 15 A
FUSES
TYPE:
Fast acting ceramic fuses, 250VAC
AMP RATING:
12 A (110 - 120VAC)
8A (220 - 240VAC)
15A (100 VAC)
OPERATING SPEED:
F (Fast Acting)
BREAKINGCAPACITY:
15A, 12A: 750A @ 250 Vac
15A, 12A: 10,000A @ 125 Vac
8A: 200A @ 250 Vac
8A: 10,000 A @ 125 Vac
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