Philips Medical Systems North America M3813A2 Low Power Transmitter User Manual Manual

Philips Medical Systems North America Co. Low Power Transmitter Manual

Manual

44SpecificationsModel M3813AType • Internally powered equipment• Type B applied part• IPXO Ordinary Equipment• Continuous operationAudio Voice readout of weight, prompts, and 3 volumesettings, plus silence.Display • Digital, 0.7” (18 mm) character height• Weight displayed and announced simultaneouslyMeasurement range 66 to 330 lbs. (30 to 150 kg)Accuracy ±1% ±1.1 lbs. (.5 kg)Display units Pounds or kilograms, user-selectableMaximum allowable 330 lbs. (150 kg)weight Grab bar and column Removable attachmentPower source Four type AA (1.5 volt) alkaline batteries connectedin series (6.0 volts), includedBattery life Approximately 6 months with daily measurementM3813-90001-UG-ENG-revD.qxd 4/27/01 3:42 PM Page 44
45Scale User GuideSpecificationsOperating environment • 50º to 104º F (10º to 40º C)• 85% relative humidity• Atmospheric pressure 572 - 1013 hPa (0 - 15,000 feet or 0 - 4,600 meters of altitude)• WARNING: This equipment is not suitable for usein the presence of flammable anaesthetic mixturewith air or with oxygen or nitrous oxide.• 15º to 130º F (-9º to 54º C)• 85% relative humidity• Atmospheric pressure 572 - 1013 hPa(0 - 15,000 feet or 0 - 4,600 meters of altitude)Dimension (approx.) • Height including column attachment: 40-7/8" (104 cm)• Length: 19-3/8” (49 cm)• Width including grab bars: 20" (51 cm)Weight (approx.) With column and batteries - 15 lbs. (6.8 kg)Transport andStorage environmentM3813-90001-UG-ENG-revD.qxd 4/27/01 3:42 PM Page 45
46Electromagnetic CompatibilityThe electromagnetic compatibility (EMC) validation of theM3813A Scale included testing performed according to the interna-tional standard for EMC with medical devices. See theManufacturer’s Declaration for details.Electromagnetic Compatibility TestingDuring the test program, the Scale was subjected to many EMCtests, including both international standard and Agilent proprietarytests. During most of the testing no anomalies were observed. Forone of the tests, EN 61000-4-3 Radiated Immunity, reduced per-formance was observed.EN 61000-4-3 specifies that the product be subjected to a field of3 Volts/meter over a frequency range of 26 to 1000 MHz with nodegradation of performance or loss of function below the perfor-mance level specified when equipment is operated as intended. Atmany of the test frequencies over the specified range, no anom-alies were observed. However, at a number of test frequencies,radio communications from the Scale to the M3812A Home Hubwas disrupted. These reduced levels are as low as 0.04 V/m in therange from 800.732 MHz to 977.035 MHz. In addition, change inmeasured weight was excessive at some frequencies. Thesereduced levels are as low as 0.42 V/m at 32.998 MHz in the rangefrom 26 MHz to 1000 MHz.The phenomena discussed above are not unique to this Scale, butare characteristic of medical and radio instrumentation in usetoday. The Home Hub is a radio receiver and its reception can bedegraded by electromagnetic interference. Sensitive high gain cir-cuits used in measurements can be affected by electromagneticinterference.M3813-90001-UG-ENG-revD.qxd 4/27/01 3:42 PM Page 46
47Scale User GuideElectromagnetic CompatibilityAvoiding Electromagnetic Interference ProblemsEliminating the source of interference or moving it away can pre-vent electromagnetic interference. Possible sources of interferingradio frequency radiation are cellular telephones, cordless tele-phones, or other products that contain radio transmitters. The Scalehas a Radio Test Button that sends a reduced strength test radio sig-nal to the Home Hub, which sounds an audio tone if the test signalis successfully received. This test can be used to determine whethersources of interference are present. These sources can be turned offor moved away to reduce their strength and reduce interference. Inaddition, the Scale and the Home Hub can be placed closer to eachother so that the radio transmission from the Scale to the Home Hubhas less distance to travel and interfering radio signals have lesseffect. The radio transmission from the Scale is repeated periodicallyso that an intermittent source of interference should only delayreception.M3813-90001-UG-ENG-revD.qxd 4/27/01 3:42 PM Page 47
48FCC RegulationsThis equipment has been tested and found to comply with the lim-its for a Class B digital device, pursuant to Part 15 of the FCCrules. These limits are designed to provide reasonable protectionagainst harmful interference in a residential installation. Thisequipment generates, uses, and can radiate radio frequency ener-gy. If it is not installed and used in accordance with the instruc-tions, it might cause harmful interference to radio communica-tions. However, there is no guarantee that interference will notoccur in a particular installation. If this equipment does causeharmful interference to radio or television reception, which can bedetermined by turning the equipment off and on, the user isencouraged to try to correct the interference by one or more of thefollowing measures:• Re-orient or relocate the Home Hub.• Increase separation between the measurement devices or the Home Hub and the device being interfered with; e.g., the tele-vision.• Consult your Health Care Provider.Note: Any changes or modifications to the equipment that are notexpressly approved by Agilent could void the user’s authority tooperate this equipment.M3813-90001-UG-ENG-revD.qxd 4/27/01 3:42 PM Page 48

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