PASCO Specialty & Mfg. CI-6534A User's Manual
Contents
1. of a container of gas is directly proportional to its absolute temperature Set up a sealed container of air by attaching the longer piece of plastic tubing to a stopper in a 125 mL Erlenmeyer flask Put a drop of glycerin on the bottom of one hole of a two hole rubber stopper Put the glass part of an eyedropper tip end up through one hole in the rubber stopper CAREFULLY put the end of the plastic tubing over the tip of the eyedropper Connect the other end of the tube to the pressure port connector at the front of the pressure sensor unit Put a drop of glycerin on the top of the other hole Insert a temperature sensor through the hole Place the stopper in the top of the flask See Figure 8 Temperature Sensor Pressure Pressure flask Sensor Water bath To interface To interface Figure 8 Experiment Setup For Gay Lussac s Law Place the flask in water baths of different temperatures Record data on how the pressure changes with the temperature changes Pressure in Liquids Put the end of the longer piece of tubing under water The pressure reading should increase by 0 0978 kPa 0 02896 in of mercury per centimeter of depth below the surface You can also use a J shaped tube to study how pressure relates to the difference in heights of the liquid in the two parts of the tube Respiration Rate Sensor Studying Chemical Reactions by Monitoring Pressure Many chemical reactions produce gases that can cause an inc2. Instruction Sheet for the PASCO Model CI 6534A and CI 6535 012 07034A 3 99 1 00 Cl 6534A LOW PRESSURE SENSOR 0 10kPa Cl 6535 RESPIRATION RATE SENSOR polyurethane tubing quick release connectors 4 pressure port connector cable with DIN connectors to computer interface Pressure Sensor unit Introduction The PASCO Model CI 6534A Low Pressure Sensor 0 10kPa is a pressure sensor that is designed to be used with a PASCO computer interface This low pressure sensor is ideally suited for use with the PASCO Respiration Belt or the PASCO Heat Engine Apparatus Cl 6534A Low Pressure Sensor The low pressure sensor consists of the electronics box with a cable that has a DIN plug for connecting to a PASCO computer interface The pressure sensor uses a 10 kiloPascal transducer This type of transducer has two ports The reference port of the transducer is inside the electronics box It is always open to the atmosphere and not available to the user The other port is connected to the atmosphere via the pressure port connector at the front of the pressure sensor unit It has a quick release style connector for attaching accessories such as the PASCO CI 6535 Respiration Belt accessory which includes a Low Pressure Sensor The pressure sensor gives a reading of zero when there is no pressure difference between the internal reference port and the external pressure port conne
3. UDED e Low Pressure Sensor Gauge unit e quick release connectors 4 e polyurethane tubing 0 6m e plastic syringe 20cc calibrated 012 07034A ADDITIONAL REQUIRED e computer PC or Macintosh e Science Workshop computer interface e Science Workshop software version 2 2 or higher ADDITIONAL RECOMMENDED e Respiration Belt PASCO part no 003 05936 included in the CI 6535 Respiration Rate Sensor e Heat Engine Gas Law Apparatus PASCO part no TD 8572 Extra parts are available as follows Item Part Number plastic syringe 699 084 polyurethane tubing 640 023 quick release connector 640 021 Respiration Belt 003 05936 Range and Resolution The range of the CI 6534A Low Pressure Sensor is between 0 and 10 kiloPascals The resolution of the sensor is 0 005 kiloPascals kPa when used with a PASCO computer interface The output voltage from the sensor is 1 00 Volts when the pressure is 1 kiloPascal kPa and the output voltage is linear Therefore the output voltage should be 10 00 Volts at the top of the range 10 kPa Atmospheric pressure is normally around 101 326 kiloPascals kPa Pressure can be measured in many different units e g atmospheres inches of mercury millimeters of mercury kiloPascals Bar pounds per square inch Some equivalent values for pressure are l atmosphere 30 00 in of Hg at 16 C 760 millimeters of Hg 101 326 kiloPascals kPa 1 013 Bar 1013 milliBar 14 696 p
4. alog output 10 to 10 V analog output signal ground power ground 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 workmanship 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 or freight prepaid Damage caused by improper packing of the equipment for return shipment will not be covered by the warranty Shipping costs for returning the equipment after repair will be paid by PASCO scientific Address PASCO scientific 10101 Foothills Blvd Roseville CA 95747 7100 Phone 916 786 3800 FAX 916 786 8905 email techsupp pasco com web WWw pasco com PASC Ce ser entifie
5. ctor The transducer is durable but it is designed to be used with non corrosive gases such as air helium nitrogen etc Do not let the transducer get wet The maximum short term pressure that the sensor can tolerate without permanent damage is about 100 kPa 14 psi Please be careful to not apply high pressure to the sensor The electronics box contains a precision operational amplifier op amp that can drive a heavy capacitive 1999 PASCO scientific PASC Ci scientific 10101 Foothills Blvd Roseville CA 95747 7100 Phone 916 786 3800 FAX 916 786 8905 www pasco com Respiration Rate Sensor load such as a six meter extender cable CI 6515 There is a resistor in parallel with the transducer to compensate the sensor for temperature induced variations The sensor has a negative temperature coefficient resistance decreases as temperature increases and the resistor has a positive temperature coefficient CI 6535 Respiration Rate Sensor The CI 6535 Respiration Rate Sensor consists of the CI 6534A Low Pressure Sensor and the PASCO Respiration Belt 003 05936 See Figure 1 Figure 1 Respiration Rate Sensor The belt has the following features e hook and pile strips sewn onto opposite ends of the belt e attached squeeze bulb for inflating the rubber bladder inside the belt e quick release connector that can be attached to the pressure port on the Low Pressure Sensor Equipment INCL
6. elt with the squeeze bulb and monitor the respiration rate with the computer interface Placing the Respiration Belt Arrange the belt around your body so the part of the belt that has the tubes on it is on the right side of your body with the tubes hanging down from the bottom edge of the belt Place the part of the belt that has the tubes against your chest first When this part is against your chest the strips of pile should face away from your chest Then place the left side of the belt over the first part so the hook and pile strips match each other The belt should be snug around the chest but not so tight that breathing is restricted See Figure s 6 and 7 Connecting the Belt to the Sensor Align the quick release connector on the end of one of the respiration belt s tubes with the pressure port connector at the front of the pressure sensor unit 012 07034A This eed fred This ond em La Aland tion Esi Bidb Figure 6 Connecting the Respiration Belt Right Side First Inflating the Respiration Belt Turn the knurled knob that is on the squeeze bulb fully clockwise to close the release valve Squeeze the bulb several times to inflate the rubber bladder You may have to squeeze the bulb more than twenty times in order to inflate the bladder When the bladder is inflated the belt will be more snug against your chest Warning Over inflation can damage the air bladder Deflating the Respira
7. lubricate the end of the barb to make it easier to put into the short piece of tubing Put a very small amount of silicon oil or saliva onto the barb and then wipe the barb with a cloth so there is only a thin layer of lubricant on the barb Align the quick release connector with the pressure port connector of the sensor Push the connector onto the port and then turn the connector clockwise until it clicks into place less than one eighth of a turn The barb of the quick release connector is free to rotate even when the connector is firmly attached to the port See Figure 4 Push the connec tor onto the pressure port Turn the connector clockwise until it clicks less than 1 8 turn quick release connector pressure port connector tubing Figure 4 Using the quick release connectors Respiration Rate Sensor Mounting on an Experimental Apparatus Use the 1 4 20 threaded connector located on the bottom of the sensor box to secure the Pressure Sensor to an experimental apparatus Figure 5 The alignment hole fits over an alignment pin included on some PASCO apparatuses alignment hole 1 4 20 threaded connector Figure 5 Mounting connector and alignment hole Using the Respiration Belt To measure respiration rate breaths per minute place the respiration belt around your chest or upper abdomen connect one tube from the belt to the low pressure sensor inflate the respiration b
8. ounds per square inch psi PASC Ce seven frrfire 012 07034A Operation Setting up the Equipment 1 Connect the Pressure Sensor unit to analog channel A B or C of the Science Workshop computer interface box using the cable with the DIN connectors Figure 2 Alternatively the unit can be plugged directly into the analog channel jack Figure 2 Connecting the amplifier box to the interface box 2 Connect the quick release connector to the pressure port connector on the Pressure Sensor unit The sensor is temperature compensated therefore changes in room temperature will not interfere with the data Using the Syringe and Quick Release Connectors The Pressure Sensor is designed for experiments such as those that study the gas laws or for the rate of a chemical reaction by monitoring the increase or decrease in pressure For example Boyle s Law is a classic physics and chemistry concept that can be demonstrated using the sensor and the syringe See Figure 3 PASC CN serentifie Respiration Rate Sensor quick release tip connector LO O brotaliaiial barb tubing Figure 3 Using the syringe To connect the syringe to the sensor cut a short length of tubing about one inch Put the barb end of one of the quick release connectors into one end of the short piece of tubing Put the other end of the tubing over the tip on the end of the syringe Note You can
9. rease in pressure in a sealed container The pressure change can be used to monitor the rate of the reaction Other PASCO scientific also produces an Absolute Pressure Sensor Model CI 6532A a Differential Pressure Sensor Model CI 6533 and a Barometer Model CI 6531A The Absolute Pressure Sensor has a range from 0 to 700 kiloPascals The Differential Pressure Sensor is similar to the CI 6532A except that both ports of the transducer are open to the atmosphere It is designed for experiments where pressure differs from one part of the apparatus to another such as in a Venturi tube or for a demonstration of Bernoulli s principle The Barometer has a range from 800 to 1100 milliBar 24 to 32 inches of mercury It is designed to be a reliable accurate pressure sensor for weather studies It is temperature compensated and has a voltage regulator so changes in temperature or changes in the computer s power supply will not interfere with the data Note This instruction sheet was written assuming that the user has a basic familiarity with Science Workshop and has access to the User s Guide for Science Workshop Users can gain basic skills by working through the tutorial within Science Workshop Another useful resource is the Quick Reference Card for Science Workshop 012 07034A DIN Connector Specifications 1 2 3 no connection 4 5 V DC power 5 6 12 VDC power 7 12 VDC power 8 no connection an
10. tion Belt Turn the knurled knob on the squeeze belt counterclockwise to open the release valve Use your hands to push the air out of the bladder You can also deflate the respiration belt by disconnecting the tube from the pressure port on the sensor Turn the quick release connector counterclockwise to disconnect it from the pressure port FASC Ce serentifie 012 07034A 4 eer thal Low Fsaae ure Sunect Ty innate Sopa Figure 7 Respiration Belt In Place Lift up on the top flap of the respiration belt to disengage the hook and pile strips from each other when you want to remove the belt Suggested Experiments Respiration Rate versus Activity Monitor respiration rate before and after exercise Measure the respiration rate while resting Then exercise vigorously Measure the respiration rate immediately after exercise and the measure how long it takes for the respiration rate to return to the resting normal rate Respiration rate number of breaths per unit of time depends on several factors altitude lung capacity health and level of activity Higher altitudes and levels of activity would tend to increase respiration rate PASC CN serentifie Respiration Rate Sensor Larger lung capacity and generally good health would tend to decrease respiration rate Gay Lussac s Law pressure vs absolute temperature Gay Lussac s Law states that if the volume remains constant the pressure
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