Model 8330 VelociCheck Manual
Contents
1. Act Vel Std val De le Ale 2734211 Pm Where Tm Ambient temperature in C Pm Ambient pressure in kPa Example No 1 You want to measure the actual velocity in a duct The air temperature in the duct is 55 F and the 16 Appendix pressure is 14 24 psia You take a measurement and the display reads 1200 ft min Act Vel 1204 Tem 14 7 12037 ft min 460 70 14 24 Example No 2 You need to measure the actual velocity in a plenum The air pressure is 99 4 kPa and the temperature is 27 C The display reading on the VELOCICHECK is 2 30 m s 2 39m s Aata 23d BA ES Wt 273 21 1199 4 Standard vs Actual Velocity 17 Appendix B Specifications Specifications are subject to change without notice Specifications in parentheses indicate metric equivalents VELOCITY Range 0 to 4 000 ft min 0 to 20 00 m s Accuracy 5 0 of reading or 5 ft min 0 025 m s whichever is greater TEMPERATURE Range 0 to 200 F 18 to 93 C Resolution 1 F 1 C Accuracy 1 F 41 C OPERATING TEMPERATURE RANGE Instrument 32 to 149 F 0 to 60 C Probe 0 to 200 F 18 to 93 C EXTERNAL METER DIMENSIONS Size Measurements 2 75 in x 1 3 in x 5 2 in 70 mm x 33 mm x 132 mm METER PROBE TYPE Description Detached telescoping Material Nickel plated brass and stainless steel METER PROBE DIMENSIONS Probe length 37 in 94 0 cm telescop2. Ventilation Testing Balancing Model 8330 VELOCICHECK Air Velocity Meter Operation and Service Manual 1980066 Revision E October 2002 VELOCICHECK Model 8330 Air Velocity Meter Operation and Service Manual U S Sales and Customer Service 800 874 2811 651 490 2811 Fax 651 490 3824 SHIP MAIL TO TSI Incorporated 500 Cardigan Road Shoreview MN 55126 USA 1980066 Revision E October 2002 INTERNATIONAL Sales and Customer Service 001 651 490 2811 Fax 001 651 490 3824 E mail address answers tsi com Website www tsi com Copyright TSI Incorporated October 2002 All rights reserved Address TSI Incorporated 500 Cardigan Road Shoreview MN 55126 USA Fax No 651 490 3824 LIMITATION OF WARRANTY AND LIABILITY Seller warrants the goods sold hereunder under normal use and service as described in the operator s manual shall be free from defects in workmanship and material for twenty four 24 months or the length of time specified in the operator s manual from the date of shipment to the customer This warranty period is inclusive of any statutory warranty This limited warranty is subject to the following exclusions a Hot wire or hot film sensors used with research anemometers and certain other components when indicated in specifications are warranted for 90 days from the date of shipment b Parts repaired or replaced as a result of rep
3. 8 Chapter 2 If you do not install fresh batteries and the voltage falls below 2 volts the display will go blank Alkaline batteries are recommended for longest life and the VELOCICHECK battery life indicator will be most accurate with alkaline batteries VELOCICHECK Operation 9 Chapter 3 Maintenance The VELOCICHECK requires very little maintenance to keep it performing well Probe tip Periodically inspect the probe tip to ensure that it is clean Dust and oil deposits on the tip and sensor decrease the accuracy of the VELOCICHECK CAUTION The VELOCICHECK must be switched off for cleaning Do not use high pressure air strong solvents or brushes to clean the sensor tip damage to the sensors could result To remove dust blow it off with a gentle stream of air or rinse it off with a gentle stream of water To remove a combination of dust and oil rinse the probe tip in isopropyl alcohol and then blow it off with a gentle stream of air Never use heat to dry the probe Allow the sensor to dry thoroughly before use Cases If the instrument case or storage case needs cleaning wipe it off with a soft cloth and isopropyl alcohol or a mild detergent Never submerge the VELOCICHECK Storage When storing the VELOCICHECK for more than a month it is recommended that you remove the batteries to prevent damage due to batteries leaking Service To maintain a high degree of accuracy in your velocity
4. measurements TSI recommends that you return your instrument to the factory for annual calibration For a nominal fee we will recalibrate the unit and return it to you with a certificate of calibration and NIST traceability This annual checkup assures you of consistently accurate readings it is especially important in applications where strict calibration records must be maintained 12 Chapter 3 Chapter 4 Troubleshooting Table 3 lists the symptoms possible causes and recommended solutions for common problems encountered with the VELOCICHECK If your symptom is not listed or none of the solutions solves your problem please contact TSI Table 3 Troubleshooting the VELOCICHECK a ee gt Symptom Causes Actions No display Unit not Switch on the unit FF Low or dead Replace the Dirty battery Clean the battery contacts contacts Batteries Check the battery installed alignment against incorrectly illustration inside battery cover BAT is blinking Batteries are Replace the getting low batteries 13 cae ee er Symptom Causes Actions Display reads Batteries are Replace the LO and the low batteries BAT indicator is on contacts contacts Velocity reading The flow is Reposition the fluctuates badly fluctuating probe in a less turbulent section of the flow or set the RESPONSE switch to SLOW Velocity reading The velocity Use an alternate blinks 4000 exceeds 4000 method to measure ft m
5. second a new reading is taken and the oldest reading is thrown out Depending on the position of the sensor response switch either the last 3 readings or all 12 readings will be averaged for display Batteries The VELOCICHECK is powered by four AA size batteries TSI ships the instrument with alkaline batteries but nickel cadmium rechargeable batteries may be used Keep in mind that battery life is a function of the velocity being measured the higher the velocity the shorter the life Table 2 shows typical battery life for both alkaline and nickel cadmium batteries at three velocities VELOCICHECK Operation 7 Table 2 Typical Battery Life at Three Velocities Alkaline Nickel Air Velocity Life Cadmium Life too 50 6 134 At 20 C The VELOCICHECK continually monitors its battery supply voltage Then the battery life falls below 15 the battery indicator BAT in the upper left corner of the display will blink on and off This indicates a low battery condition and means that the batteries will soon need to be replaced Once the BAT indicator begins to blink you still have a few minutes to complete the measurements you are making While the indicator is blinking the VELOCICHECK continues to measure accurately If the battery voltage falls below 3 5 VDC the display will read LO and the BAT indicator will be on continuously Batteries must then be replaced before velocity readings can be taken
6. Available Application Notes e Constant temperature Thermal Anemometry Theory TI 105 e Traversing a Duct to Determine Average Air Velocity or Volume TI 106 To obtain any of the listed Application Notes contact TSI at the following U S 800 874 2811 651 490 2811 Fax 651 490 3824 International 1 651 490 2811 Fax 1 651 490 3824 Chapter 1 Setup This chapter guides you through unpacking and installing batteries into your VELOCICHECK See chapter 2 for a detailed description of the digital VELOCICHECK s operating functions Unpacking Carefully unpack the instrument and accessories from the shipping container Check the individual parts against the list of components in Table 1 if any are missing or damages notify TSI immediately Table 1 List of Components Qty Part VELOCICHECK Model 8330 8330 Carrying case 1319042 AA alkaline batteries 1208013 Operation and service manual 1980066 Installing the batteries Install batteries by loosening the screw in the battery access cover located on the back of the instrument Insert four size AA batteries in the battery tube according to the polarity indicated on the instrument case under the battery access cover Replace the battery access cover and tighten the screw If the batteries are installed incorrectly no damage to the VELOCICHECK will occur but the instrument will not function 2 Chapter 1 Chapter 2 VELO
7. CICHECK Operation This chapter thoroughly explains how to operate the VELOCICHECK Extending the probe The Model 8330 VELOCICHECK contains a telescoping velocity and temperature measuring probe which is shipped in its collapsed position To expose the probe to the flow for air velocity or temperature measurements grasp the tip of the probe and pull firmly To retract or collapse the probe simply push the tip of the probe straight toward the handle When you collapse the probe be sure to allow room for the cable to move freely out of the base of the probe Hindering the movement of the cable at the base of the probe will make it difficult to collapse the probe Always store the probe retracted when not in use in order to protect the sensor NOTE As you handle the probe take care not to bump it against duct walls or other objects The probe has been made as rugged as possible but it can be damaged by careless handling Measuring temperature Whenever you plan to measure both temperature and velocity it is best to measure temperature first HINT for measuring temperature Switch the VELOCICHECK to the temperature mode before turning the instrument on This will minimize the time required for the temperature sensor to stabilize The temperature measuring sensor is in the window near the end ofthe probe Extend the probe and expose the sensor in the window to the air where you want to measure temperature When yo
8. air services are warranted to be free from defects in workmanship and material under normal use for 90 days from the date of shipment Seller does not provide any warranty on finished goods manufactured by others or on any fuses batteries or other consumable materials Only the original manufacturer s warranty applies d Unless specifically authorized in a separate writing by Seller Seller makes no warranty with respect to and shall have no liability in connection with goods which are incorporated into other products or equipment or which are modified by any person other than Seller The foregoing is IN LIEU OF all other warranties and is subject to the LIMITATIONS stated herein NO OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR PARTICULAR PURPOSE OR MERCHANTABILITY IS MADE TO THE EXTENT PERMITTED BY LAW THE EXCLUSIVE REMEDY OF THE USER OR BUYER AND THE LIMIT OF SELLER S LIABILITY FOR ANY AND ALL LOSSES INJURIES OR DAMAGES CONCERNING THE GOODS INCLUDING CLAIMS BASED ON CONTRACT NEGLIGENCE TORT STRICT LIABILITY OR OTHERWISE SHALL BE THE RETURN OF GOODS TO SELLER AND THE REFUND OF THE PURCHASE PRICE OR AT THE OPTION OF SELLER THE REPAIR OR REPLACEMENT OF THE GOODS IN NO EVENT SHALL SELLER BE LIABLE FOR ANY SPECIAL CONSEQUENTIAL OR INCIDENTAL DAMAGES SELLER SHALL NOT BE RESPONSIBLE FOR INSTALLATION DISMANTLING OR REINSTALLATION COSTS OR CHARGES No Action regardless of form may be brought against Seller mo
9. ic Probe tip diameter 0 236 in 6 0 mm Probe base diameter 0 395 in 10 03 mm 19 DISPLAY Type Digital Description 41 2 digits 0 4 in LO mm high TIME CONSTANT Fast mode 3 second averaging Slow mode 12 second averaging POWER REQUIREMENTS four 4 AA size batteries nickel cadmium or alkaline provided BATTERY LIFE Minimum 10 hours at 100 ft min 0 5 m s using alkaline batteries STANDARD EQUIPMENT Free certificate of NIST traceability operation and service manual four AA size alkaline batteries and hard shell carrying case 1 The accuracy statement of 5 0 of reading or 5 ft min 0 025 m s begins at 25 ft min through 4000 ft min 0 13 through 20 00 m s U S National Institute of Standards and Technology 20 Appendix B TSI TSI Incorporated 500 Cardigan Road Shoreview MN 55126 U S A Web www tsi com
10. in or 20 32 ft min or the velocity m s 20 32 m s be damaged Display Sensor may Contact TSI indicates over 10 be damaged ft min 0 05 m s with probe retracted 14 Chapter 4 Appendix A Standard Velocity vs Actual Velocity Since thermal sensors are sensitive to changes in air density and air velocity all thermal anemometers indicate velocities with reference to a set of standard conditions For TSI instruments standard conditions are defined as 70 F 21 1 C and 14 7 psia 101 4 kPa Other manufacturers may use different values Standard velocity is the velocity the air would be moving ifthe temperature and pressure were at standard conditions It is usually the most useful measure of airflow because it defines the heat carrying capacity of the air Actual velocity is the velocity at which a microscopic particle of dust would be traveling if it were in the airstream Because actual air density is rarely equal to air density at standard conditions actual velocity usually differs from standard velocity In some instances actual air velocity rather than standard velocity may be of interest To obtain the value for actual velocity multiply your standard velocity readings as indicated by the VELOCICHECK by the following density correction factor Act Vel Savall KUE 1 amp 7 460 70 P Where T Ambient temperature in F P Ambient pressure in psia If you use metric units the equation becomes
11. re than 12 months after a cause of action has accrued The goods returned under warranty to Seller s factory shall be at Buyer s risk of loss and will be returned if at all at Seller s risk of loss Buyer and all users are deemed to have accepted this LIMITATION OF WARRANTY AND LIABILITY which contains the complete and exclusive limited warranty of Seller This LIMITATION OF WARRANTY AND LIABILITY may not be amended modified or its terms waived except by writing signed by an Officer of Seller Service Policy Knowing that inoperative or defective instruments are as detrimental to TSI as they are to our customers our service policy is designed to give prompt attention to any problems If any malfunction is discovered please contact your nearest sales office or representative or call TSI s Customer Service department at 800 874 2811 USA and 1 651 490 2811 International CONTENTS Chapters 1 Sep ak 1 Unpacking seess nrerinaincini 1 Installing the batteries 2 2 VELOCICHECK Operation 3 Extending the probe 3 Measuring temperature 4 Measuring velocity eeee 5 Switching on the power 6 Selecting temperature velocity display 6 Selecting the sensor response 7 Batteries iii 7 3 Maintenance 11 Probe tip esse 11 CASOS ae ea 12 MO ea 12 O een 12 Appendixes A Standard vs Actual Velocity 15 B Specifications oomoommmmoo 19
12. t 5 seconds This number represents the approximate percentage of battery life remaining and will range from less than zero for a low battery to something over 100 for a short time while the surface charge of the new batteries burns off After 5 seconds the VELOCICHECK will begin to display velocity or temperature in the selected units Units available for display are standard feet per minute S ft min and degrees Fahrenheit F and standard meters per second S m s and degrees Celsius C depending on which instrument you purchased The units of measure cannot be changed in the field Selecting temperature velocity display The TEMP VEL switch on the instrument allows you to switch between the instrument s two measuring modes Slide the switch to the TEMP position to read the current temperature or to the VEL position to read the current velocity 6 Chapter 2 Selecting the sensor response The Model 8330 VELOCICHECK has a FAST SLOW response switch for setting the sensor response speed In the slow response mode the VELOCICHECK displays the average velocity measured during the past 12 seconds This is a running average so the display is updated once a second In the fast response mode the meter displays the average velocity measured during the past 3 seconds The way the VELOCICHECK does velocity averaging is by saving the velocity measured each of the past 12 seconds into 12 separate locations in memory Every
13. u measure temperature in moving air orient the window of the probe so that the air flows through the window This will minimize the time required for the temperature readings to stabilize 4 Chapter 2 Measuring velocity For highest accuracy it is important with all VELOCICHECKs to properly align the probe to the flow For accurate results the measured air must flow through the sensor window at the end of the probe HINT for measuring velocity Ifthe probe is left to warm up for more than a few seconds at velocities below 50 feet minute 0 25 meters sec it will require more time to stabilize when it is inserted into a higher flow This is because the probe assembly self heats at such low flows and must then re stabilize when placed into higher flow Fro best response time at velocities of 100 200 feet minute 0 5 1 meters sec it is recommended to first place the probe into the flow and then turn the meter on When the Model 8330 VELOCICHECK is in the velocity mode the temperature sensor will be warmed by heat from the velocity sensor Ifthe VELOCICHECK is then switched to temperature mode 1t will read several degrees high until the temperature sensor can cool Therefore when you plan to measure both temperature and velocity it is best to measure temperature first VELOCICHECK Operation 5 Switching on the power Turn on the VELOCICHECK using the ON OFF switch The VELOCICHECK will display battery life for the firs
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