PASCO Specialty & Mfg. ME-9204B User's Manual
Contents
1. 1997 PASCO scientific This instruction sheet edited by Martina Graham oJ 10101 Foothills Blvd e P O Box 619011 Roseville CA 95678 9011 USA m Phone 916 786 3800 FAX 916 786 8905 email techsupp PASCO com scientific Accessory Photogate 012 06375A The Photogate Head can be mounted on a support rod of up to half inch in diameter by attaching a PASCO ME 8744 Adjustable Angle Clamp It is necessary to re move the mobile rod clamp from the clamp assembly and secure the fixed part of the clamp assembly to the 1 4 20 thread provided in the photogate housing opposite the side of the small rod clamp Rotate the equipment to the correct orientation and then secure it with the locking knob Photogate Head Adjustable Angle Clamp fixed 1 4 20 thread locking knob Poe diameter support rod The Photogate Head can also be attached to the side of a PASCO Dynamics Track with an IDS mounting bracket part of PASCO ME 9471 IDS Photogates and Fences It is necessary to remove the small rod clamp from the photogate housing Dynamics Track Q PN IDS mounting CO Photogate Head bracket Operation Clamp the Photogate Head to the support rod Position the photogate so the object to be timed will pass through the photogate blocking the beam See Figure Photogate with Pendulum To minimize parallax error pass the object2. Instruction Sheet for the PASCO Model ME 9204B 012 06375A 4 97 1 00 ACCESSORY PHOTOGATE Introduction The PASCO Model ME 9204B Accessory Photogate fea tures a Photogate Head with a narrow infrared beam and a fast fall time that provide very accurate signals for tim ing When the infrared beam between the source and de tector is blocked the output of the photogate is low and the red LED light emitting diode on the photogate goes on When the beam is not blocked the output is high and the LED is off The cable assembly included with the Accessory Photogate is detachable from the unit One end of the cable is a RJ12 telephone plug that connects to the RJ12 modular jack in the photogate housing At the other end a stereo phone plug connects directly into a PASCO Photogate Timer ME 9206B and ME 9215B or into any PASCO interface with digital channels ScienceWorkshop 500 I and 700 I Please note that the ME 9215B has a memory function which allows signals from two photogates the built in photogate on the ME 9215B and the ME 9204B to be stored and retrieved The Photogate Head also includes a small rod clamp and thumbscrew for attaching the unit to the base and support rod included with the product or to any quarter inch di ameter support rod Additional Features The raised slot on the housing provides a seat for attach ing the PASCO ME 9450 Super Pulley removable RJ12 connector
3. as close to the detector as possible with the line of travel perpendicular to the beam Loosen the clamp screw to change the angle or height of the photogate Plug the RJ12 phone plug from the cable assembly into the modular phone jack on the photogate housing Plug the stereo phone plug at the other end of the cable assembly into the timer adapter cable or inter face Test the operation of the photogate by watching the LED when the beam is blocked Pose LED ON when to timer beam is blocked RJ12 phone plug Photogate to modular phone Head jack on photogate I small rod clamp detector emitter ss 1 4 dia support rod base Accessory Photogate PASC Ci scientific 012 06375A Accessory Photogate NOTES e The actual length of an object passing through the photogate may be slightly different than the effective length seen by the photogate To deter mine the effective length push the object through the photogate and measure the distance moved by the object from where the LED first comes ON to where it goes off Use this effec tive length rather than the actual length in cal culations For example if you were measuring the speed of the object you would divide the effective length by the time during which the object blocked the photogate beam A stereo phone plug extension cord such as PASCO Model PI 8117 will inc
4. r freight prepaid Damage caused by improper packing of the equipment for return ship ment will not be covered by the warranty Shipping costs for returning the equipment after repair will be paid by PASCO scientific Feedback If you have any comments about the product or manual please let us know If you have any suggestions on alter nate experiments or find a problem in the manual please tell us PASCO appreciates any customer feedback Your input helps us evaluate and improve our product To Reach PASCO For technical support call us at 1 800 772 8700 toll free within the U S or 916 786 3800 fax 916 786 3292 e mail techsupp pasco com web WWw pasco com PASC Cii scientific
5. rease the sepa ration between the photogate and the timer Experiments Refer to the experiment guide that comes with your PASCO equipment e g Introductory Dynamics Sys tem Photogate Specifications Detector rise time lt 500 ns Detector fall time lt 50 ns Parallax error For an object passing within 1 cm of the detector with a velocity less than 10 m s the difference between the true and effective length is less than 1 mm Power requirements 5 VDC 5 at 45 mA Infrared source Peak at 880 nm Signal W Stereo Phone Plug PASC Ci screntific gt INN Photogate with Pendulum Accessory Photogate 012 06375A Limited Warranty PASCO scientific warrants the product to be free from defects in materials and workmanship for a period of one year from the date of shipment to the customer PASCO will repair or replace at its option any part of the product which is deemed to be defective in material or workman ship The warranty does not cover damage to the product caused by abuse or improper use Determination of whether a product failure is the result of a manufacturing defect or improper use by the customer shall be made solely by PASCO scientific Responsibility for the return of equipment for warranty repair belongs to the customer Equipment must be properly packed to prevent damage and shipped postage o
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