Research Grade Blood Pressure Transducer User`s Manual
Contents
1. replacement and return If the unit is replaced the replacement unit is covered only for the remainder of the original warranty period dating from the purchase of the original device This warranty gives you specific rights and you may also have other rights which vary from state to state Repair Facilities and Parts Harvard Apparatus stocks replacement and repair parts When ordering please describe parts as completely as possible preferably using our part numbers If prac tical enclose a sample or drawing We offer a complete reconditioning service AN CAUTION Not for clinical use on human patients Publication 5408 002 REV A s Harvard Apparatus Research Grade Blood Pressure Transducer User s Manual Theory of Operation This Blood Pressure Transducer converts pressure to a proportional DC voltage value A transparent plastic dome with two Luer lock fittings contains the liquid whose pressure values are to be monitored One of the Luer lock fittings is used for con necting tubing to the source to be monitored and the other to purge air that would otherwise markedly degrade the transducer s dynamic i e changing response capa bilities The dome has an internal membrane that contacts a button on the sensing head Liquid pressure within the dome acts through the membrane to produce a force upon the button The force in turn acts against a rigid flexure spring assembly to pro duce a small increment of motion which i2. Serial Numbers All inquires concerning our product should refer to the serial number of the unit s Warranty Harvard Apparatus warranties the instrument s for a period of two years from date of purchase At its option Harvard Apparatus will repair or replace the unit s if it is found to be defective as to workmanship or material This warranty does not extend to damage resulting from misuse neglect or abuse normal wear and tear or accident This warranty extends only to the original customer purchaser IN NO EVENT SHALL HARVARD APPARATUS BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES Some states do not allow exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you THERE ARE NO IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE OR OF ANY OTHER NATURE Some states do not allow this limitation on an implied warranty so the above limitation may not apply to you If a defect arises within the two year warranty period promptly contact Harvard Apparatus Inc 84 October Hill Road Holliston Massachusetts 01746 1371 using our U S only toll free number 1 800 272 2775 or dial 508 893 8999 Goods will not be accepted for return unless an RMA returned materials authorization number has been issued by our customer service department The customer is responsible for shipping charges Please allow a reasonable period of time for com pletion of repairs
3. Research Grade Blood Pressure Transducer User s Manual Research Grade Blood Pressure Transducer 110 VAC 60 Hz MA1 60 3002 Research Grade Blood Pressure Transducer 220 VAC 50 Hz MA1 60 3003 HARVARD APPARATUS Publication 5408 002 REV A Publication 5408 002 REV A WEEE RoHS Compliance Statement EU Directives WEEE and RoHS To Our Valued Customers We are committed to being a good corporate citizen As part of that commitment we strive to maintain an environmentally conscious manufacturing operation The European Union EU has enacted two Directives the first on product recycling Waste Electrical and Electronic Equipment WEEE and the second limiting the use of certain substances Restriction on the use of Hazardous Substances RoHS Over time these Directives will be implemented in the national laws of each EU Member State Once the final national regulations have been put into place recycling will be offered for our products which are within the scope of the WEEE Directive Products falling under the scope of the WEEE Directive available for sale after August 13 2005 will be identified with a wheelie bin symbol Two Categories of products covered by the WEEE Directive are currently exempt from the RoHS Directive Category 8 medical devices with the exception of implanted or infected products and Category 9 monitoring and control instruments Most of our products fall into either Category 8 or 9 and are cur
4. V to 100 mmHg 1 0 V 2 MHz 32 x 45 x 42 mm 1 26 x 1 77 x 1 65 in 70 g 2 1 2 oz Amplifier Power Supply a The entire transducer is powered by a 12 volt AC wall transformer b There is no ON OFF switch The unit can remain powered as shown on the digital meter for the entire experiment Front Panel Control The offset knob on the front panel is used to set a zero output voltage for any static pressure up to 100 mmHg Publication 5408 002 REV A s Harvard Apparatus Research Grade Blood Pressure Transducer User s Manual General Information Electrical Output a Binding post are provided on the power supply for output connections Red is positive black is negative and also ground b Output voltage is 1 0 V 100 mmHg pressure up to 300 mmHg Output impedance is 2 KQ for direct connection to all recorders c The digital panel meter calibrated in mmHg reads output voltage x 100 d High Low and Offset trim pots are factory calibrated DO NOT adjust Binding Posts High Gain Trim Z 4 Low Gain Trim Offset Trim To Transducer Sensing Head 12 Volt AC Cable Figure 2 Electrical Output Maintenance and Storage a No special precautions are required other than keeping a dome installed at all times and preventing liquids from entering the sensing head b When not in use store in a clean dry place Serial Number The serial number is l
5. m The dome cavity is shaped like a cone with one Luer lock fitting at the tip apex and the other to the side lateral Flushing in the side and out the tip while held vertically allows the bubbles to rise Tapping with a finger may be required to dislodge additional bubbles Be sure to pro vide sufficient opening to allow fluid to escape and thereby prevent excessive pres sure build up which may rupture the dome This precaution is especially important when filling an unmounted dome since the membrane is not supported and can withstand only 300 mmHg Thus installing the dome on the sensing head before filling is the safest procedure but may not always be possible Close off the filling tube with a stopcock or by pinching it Publication 5408 002 REV A
6. ocated on the power supply circuit board Refer to this num ber in any correspondence Replacement Parts Catalog No Product 52 9990 Replacement Domes pkg of 2 Publication 5408 002 REV A 4 Harvard Apparatus Research Grade Blood Pressure Transducer User s Manual Operation Installing the Dome Install the dome and make liquid connections Take care to avoid cross threading The threads will engage smoothly and finger tightening is adequate Liquid Connections Orienting one of the Luer lock fittings vertically will facilitate clearing air bubbles when filling with liquid The dome may be installed empty or filled with liquid In either case make sure that the pressure in the dome does not exceed 300 mmHg Otherwise the membrane may rupture Once installation is complete the membrane is supported by the sensing button Luer Lock Fittings Signal Cable To Amplifier Power Supply Mounting Shaft Sensing Head Figure 3 Sensing Head Publication 5408 002 REV A Harvard Apparatus Research Grade Blood Pressure Transducer User s Manual Operation Filling and Purging Air The presence of trapped air bubbles anywhere within the liquid column will add compliance to the system and degrade the transducer s dynamic response capabili ties For this reason it is recommended that the dome tubing and lumen be filled with a continuous flush until all bubbles have been cleared from the syste
7. rently exempt from the RoHS Directive We will continue to monitor the application of the RoHS Directive to its products and will comply with any changes as they apply Do Not Dispose Product with Municipal Waste Special Collection Disposal Required 5 Harvard Apparatus Research Grade Blood Pressure Transducer User s Manual Table of Contents SUBJECT PAGE NO Warranty and Repair Information ssssee 2 Theory Of Operation ccccccsseeeeesssesssesesssseeeees 3 General Information SPSCIMCAUONS socsiczasszp rian iatadanseacaastardteammeanaaeears 4 Amplifier Power Supply 00ssssseeeeeeees 4 Front Panel Control x secdoecssec2vecescerecasesexeenecie 4 Electrical Output ooccccncieeisticeticevederasemeavaa veces 5 Maintenance and Storage eeeeeeeeeeeeees 5 Serial NUMber aaannnnnnnnnnnnnnnnnnnnennnnnnnnnnnnnennnenne 5 Replacement Parts csssecceeesssseeeeeeeees 5 Operation Installing the Dome nassos 6 Liquid CONNECTIONS ccceceeeeeeeeeeeeeeeeeeeees 7 Filling and Purging of Air eeeee 8 Publication 5408 002 REV A Harvard Apparatus Research Grade Blood Pressure Transducer User s Manual Warranty and Repair Information CAUTION Avoid placing force on sensing button when dome is not installed Do not allow liquid to enter sensing head since serious damage will result Transducer sensing head may not survive being dropped
8. s measured by a differential capacitor cir cuit housed within the sensing head From here a cable carries the electrical signal to the power supply where the signal is further amplified and calibrated for the purposes of gain and offset In addition an external offset control will facilitate correction for static pressure Sensing Head Mounting Shaft Dome Signal Cable Amplifier Power Supply External Offset Control PRESSURE TRANSDUCER 12 Volt AC Wall Transformer 12 Volt AC Cable Figure 1 Research Grade Blood Pressure Transducer Publication 5408 002 REV A Harvard Apparatus Research Grade Blood Pressure Transducer User s Manual General Information Specifications Input Internal Volume Compliance Sterilization Pressure Range Natural Frequency Dry Membrane Pressure Overload Pressure Output Voltage Digital Panel Meter Offset Control Carrier Frequency Sensing Head Dimensions Transducer Weight Two Luer lock connectors on transparent polycarbonate plastic dome with internal silicone rubber membrane 300 yl approx 14 uI of displacement 100 mm pressure including 30 5 cm 12 in of standard 3 mm ID vinyl tubing Chemical Alcide or Cidex 10 to 300 mmHg gt 500 Hz 300 mmHg without rupture and dome not installed 3 000 mmHg with dome installed Factory set at 1 0 V 100 mmHg Reads in mmHg output voltage x 100 Adjusts from 50 mmHg 0 5
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