Pressure Sensor 400
Contents
1. Order Code PS400 BTA The Pressure Sensor 400 measures absolute gas pressure It can be used to monitor pressure changes in gas law experiments in chemistry and physics Vapor pressure of various liquids can be monitored using this sensor Its metal fittings provide for versatile airtight connections The following is a partial list of activities and experiments that can be performed using this sensor e Investigate the relationship between pressure and volume Boyle s law e Measure vapor pressure of liquids e Study the effect of temperature on gas pressure Gay Lussac s law e Study the effect of temperature and concentration on the rate of decomposition of H0O gt Pressure Sensor 400 Accessories Included with the Pressure Sensor 400 are accessories to allow you to connect it to a reaction container or instrument Check to be sure that each of these items is included e Nickel plated brass push to connect connector To secure this adapter to the pressure sensor wrap plumber s tape around the pressure sensor threading then use the 1 2 tightening wrench to secure the adapter in place For additional security you may want to use the 22 mm tightening wrench to hold down the pressure sensor while you tighten the adapter in place e Two foot section of nylon tubing This stiff tubing is designed to fit with the nickel plated push to connect connector Its standard 1 4 OD and 0 18 ID size allows you to connect to a variety of2. Initiate the calibration procedure and make sure the one point calibration option is checked This should be the default option 3 Enter the actual pressure as the known value for Reading 1 When the voltage reading stabilizes click Keep 5 If you want to use the calibration for the current session only click Done to complete the calibration process To save the calibration onto the sensor click the storage tab and save to the sensor EAN As discussed above the Pressure Sensor 400 has been calibrated to read station pressure Station pressure is the true atmospheric pressure at your location or station If you prefer it to read sea level pressure for conducting weather studies you can perform a one point calibration to correct for elevation using the sea level corrected pressure value for your location obtained from a reputable source NOAA Weather Underground etc Sea level pressure is the pressure after the station pressure has been adjusted to its equivalent pressure at sea level This is commonly done to normalize pressures at various altitudes for weather forecasts To further improve accuracy you may want to perform a two point calibration 1 Connect the Pressure Sensor 400 to an interface and launch the software Change the units first if desired 2 Initiate the calibration procedure and uncheck the one point calibration option 3 For the first calibration point allow the sensor to equilibrate to atmospheric pressur
3. e When the voltage reading stabilizes enter the atmospheric pressure in for Reading 1 When the voltage reading stabilizes click Keep 4 For the second calibration point apply pressure with an external pump measuring it at the same time with a pressure gauge Enter the gauge reading into the calibration dialog box in your data collection program When the voltage reading stabilizes click Keep 5 If you want to use the calibration for the current session only click Done to complete the calibration process To save the calibration onto the sensor click the storage tab and save to the sensor Pressure in Liquids Depth Measurements If you measure the pressure at the end of a long plastic tube forced underwater you can indirectly measure depth Connect the tubing to the stem of the Pressure Sensor 400 and then put the end of the tube under water The pressure reading will increase 8 105 kPa 0 0800 atm or 60 79 mmHg for every meter below the surface of the water Note If you measure depth in this way the depth you are measuring is to the top of the water in the tubing Warranty Vernier warrants this product to be free from defects in materials and workmanship for a period of five years from the date of shipment to the customer This warranty does not cover damage to the product caused by abuse or improper use This watranty covers educational institutions only Consumable items such as the tubing adapters and wrenches are excluded fro
4. m the warranty Measure Analyze Learn Vernier Software amp Technology 13979 S W Millikan Way e Beaverton OR 97005 2886 Toll Free 888 837 6437 e 503 277 2299 e FAX 503 277 2440 info vernier com e www vernier com Rev 9 16 2015 Marks not owned by us that appear herein are the property of their respective owners who may or may not be affiliated with connected to or sponsored by us Ns tay Printed on recycled paper
5. third party instrumentation or adapters e Double barb brass connector To secure this adapter to the pressure sensor wrap plumber s tape around the pressure sensor threading then use the 9 16 tightening wrench to secure the adapter in place For additional security you may want to use the 22 mm tightening wrench to hold down the pressure sensor while you tighten the adapter in place e Two foot section of plastic tubing This soft tubing is designed to fit over the brass barb connector Its standard size allows you to connect to a variety of third party instrumentation or adapters e Two tightening wrenches The smaller wrench has a 1 2 end and a 9 16 end The larger wrench is 22 mm e Plumber s tape This 1 2 sealing tape should be wrapped around the threading on the pressure sensor Wrap only once and to the right as the threading runs This will help ensure an airtight seal Compatible Interfaces and Software See www vernier com ps400 bta for a list of interfaces and software compatible with the Pressure Sensor 400 Here is the general procedure to follow when using the Pressure Sensor 400 1 Connect the Pressure Sensor 400 to the interface 2 Start the data collection software or app 3 The software will identify the Pressure Sensor 400 and load a default data collection setup You are now ready to collect data NOTE Vernier products are designed for educational use Our products are not designed nor recommended for an
6. y industrial medical or commercial process such as life support patient diagnosis control of a manufacturing process or industrial testing of any kind Specifications Pressure range 0 to 410 kPa 0 to 58 0 psi 0 to 3 95 atm 0 to 3000 mmHg Maximum pressure that the sensor can tolerate l 800 kPa without permanent damage Sensing element Honeywell PX2 Series Accuracy using factory calibration 2 kPa Accuracy using one point custom calibration at 1 kPa atmosphere 10 milliseconds 40 C to 125 C Response time Temperature range How the Pressure Sensor 400 Works The active sensor in this unit is a Honeywell PX2 Series pressure transducer It has a membrane that flexes as pressure changes This sensor is arranged to measure absolute pressure One side of the membrane is a vacuum while the other side 1s open to the atmosphere The sensor produces an output voltage that varies in a linear way with absolute pressure It includes special circuitry to minimize errors caused by changes in temperature Optional Calibration Procedure You do not have to perform a new calibration when using the Pressure Sensor 400 The sensor is calibrated prior to shipping If you would like to perform your own calibration follow the steps described here A one point calibration at atmosphere is adequate for most applications To perform a one point calibration 1 Connect the Pressure Sensor 400 to an interface and launch the software 2
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