Research Grade Isotonic Transducer User`s Manual
Contents
1. Gain Trim Offset Trim To Transducer Sensing Head 12 Volt AC input Figure 2 Electrical Output Maintenance and Storage a No special precautions are required other than preventing corrosive solutions from entering the space where the output shaft exits the transducer b When not in use store in a clean dry place Serial Number The serial number is located on the power supply circuit board Refer to this number in any correspondence Harvard Apparatus Research Isotonic Transducer User s Manual Operations Transducer Setup This transducer is supplied with complete hardware to set up the transducer for smooth muscle isolated organ or exposed heart applications including bio assay tech niques in an organ bath or skeletal muscle experiments such as the muscle twitch using the frog gastrocnemius preparation The stainless steel mounting rod of the transducer should be securely fastened to a rigid stand for optimal use It should be noted that maximum sensitivity to muscle movement occurs when the string connected to the muscle is closest to the rotating shaft In this position small movements create larger angular motion see Fig 1 When the lever is horizontal and in the same plane as the handle the electrical output is zero see Fig 1 Clockwise rotation produces a positive voltage whereas counter clockwise rotation produces a negative voltage The protecting ears of the handle bracket2. limit rotation to 18 In addition there are internal limit stops Nylon Screw Rotating Shaft Lever Arm voltage 0 0 voltage voltage Figure 3 Transducer Setup Harvard Apparatus Research Isotonic Transducer User s Manual Operations Smooth Muscle Isolated Organ Preparation For smooth muscle or isolated organs preparations the following items will be used 1 Simple Wooden or Aluminum Levers 2 Lever Holding Clamp To use the levers the lever holding clamp is attached to the shaft of the transducer using the Allen wrench provided Make sure that the set screw seats on the flat portion of the shaft The clamp must be attached to the shaft so that the Allen screw seats on the flattened portion of the shaft The wooden or aluminum lever is passed through the hole in the clamp and is held in place by the spring of the clamp see Fig 2 Nylon Screw Allen Screw Ye Lever Arm 5 Aluminum or Wood Lever Clamp 0 0 voltage Figure 4 Smooth Muscle Isolated Organ Preparation 3 Harvard Apparatus Research Isotonic Transducer User s Manual Operations Skeletal Muscle Preparation For skeletal muscle contraction the following items will be used 1 Muscle Lever 2 After Loading Screw and Spring 3 Scale Pan 4 Weights Install after loading screw and spring as shown see Fig 3 Using an Allen wrench install muscle lever so that Allen screw bears on shaft A
3. to damage resulting from misuse neglect or abuse nor mal 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 completion of repairs 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 orig inal 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 a
4. Research Grade Isotonic Transducer User s Manual Research Grade Isotonic Transducer 110 VAC 60 Hz MA1 60 3000 Research Grade Isotonic Transducer 220 VAC 50 Hz MA1 60 3001 er Tinsi HARVARD APPARATUS Publication 5408 003 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 currently exempt from the RoHS Direc
5. akaway Torque 0 05 gecm Accuracy 1 Rotation 15 Output 2 0 VDC for 15 rotation Sensitivity 1 minute of arc Output Impedance 2kQ 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 Signal Cable Power Supply r a ISOTONIC TRANSDUCER 12 Volt AC Wall Transformer 12 Volt AC Cable Figure 1 Amplifier Power Supply s Harvard Apparatus Research Isotonic Transducer User s Manual General Information Internal Controls and Adjustments On the rear panel of the power supply are three small access holes to the trim pots The GAIN trim pot is accessed through the center hole and is factory set to deliver 2 0 VDC for 15 of rotation It can be adjusted to deliver between 1 3 volts output for 15 of rotation The OFFSET adjustment trim pot is located on the extreme left and has been factory adjusted so that when the flat of the shaft is horizontal output is zero volts This can also be user adjusted as required The right hole is not used 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 2 0 VDC for rotation up to 15 Output impedance is 2 KQ for direct connection to all recorders Binding Posts
6. nd repair parts When ordering please describe parts as completely as possible preferably using our part numbers If practi cal enclose a sample or drawing We offer a complete reconditioning service AN CAUTION Not for clinical use on human patients s Harvard Apparatus Research Isotonic Transducer User s Manual Theory of Operation This Isotonic Transducer converts rotary motion into a proportional DC voltage A moveable capacitor plate attached to the rotating shaft and fixed capacitor plates form a differential capacitor A patented electronic circuit U S Patent 4142144 trans forms capacitance change linearity into a DC voltage equal to 2 0 volts for 15 of rota tion The use of the capacitance principle produces the following advantages 1 Extremely low moment of inertia of 0 36 cm which is an order of magnitude better than comparable units This low inertia insures that complex quick changes are faithfully reproduced 2 Excellent linearity of 1 3 High voltage output 2 0 volts 4 Excellent stability and freedom from drift 0 O voltage M voltage Power Supply Signal Cable S Fa ISOTONIC TRANSDUCER 12 Volt AC Wall Transformer 12 Volt AC 4 Y Cable Figure 1 Research Grade Isotonic Transducer Harvard Apparatus Research Isotonic Transducer User s Manual General Information Specifications Linearity 1 Moment of Inertia 0 35 gecm without hardware Bre
7. tive 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 Isotonic Transducer User s Manual Table of Contents SUBJECT PAGE NO Warranty and Repair Information sss0seee 2 Theory Of Operation cccccsssscesssesseeeeeeeseeeeesesneeeeeees 3 General Information SPECHICALIONS canawiinvcivetocccan cence 4 Amplifier Power Supply ccccceeeeeeeeeeeeeeeeeees 4 Internal Controls and Adjustments 5 5 Electrical Output usssascstecatteeteeotaiesscesititvoaonodawhss 5 Maintenance and Storage ccceeeseeeeeeees 5 Seral NUNIDGM P oee ee aerae aaea aana aae at 5 Operations Transducer Setup isacveinects deadskreisanete es Pacsetsuaiane 6 Smoot Muscle Isolated Organ Preparation 7 Skeletal Muscle Preparation sseeeeee 8 Harvard Apparatus Research Isotonic Transducer User s Manual General Information 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
8. ttach double hook to one of the two positions on the muscle lever and add the scale pan see Fig 3 Mounting Rod After Loading Screw amp Spring Rotating Shaft T r Lever Arm 0 0 voltage a volt Scale Pan a Weights Figure 5 Skeletal Muscle Preparation
Download Pdf Manuals
Related Search