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1. 8 Start the pump and allow approximately 5 minutes to stabilize Perform this step before connecting to flow cell as air flow dries center tube if bubbles are not initiated at intervals Connect sampling medium to pump by obtaining proper hose adapters for connecting tubing to flow cell The flow cell hose connectors will accept two common sizes of vinyl tubing 1 4 and 51 6 A Luer fitting is incorporated in the upper hose connec tor The upper port is for vacuum and the bottom for pressure When the upper port is connected to vacuum the lower port must be open to the atmosphere Conversely when the lower port is connected to pressure the upper port must be open to free air Never make bubble test with bottom hose connected in series in line with sampling filter Wet the flow cell as described in Section 3 Begin Calibration depress plunger into cell and quickly release Different flow rate can require quicker or slower release of the button Carefully observe the bubble passing through the sensor zone Only a single straight bubble perpendicular to the tube wall is necessary for an accurate test If several bubbles go up to the tube at once it will not effect the test data because the first sensor will not reset until the final sensor has been tripped A good technique is to watch the bubble pass up the tube to ensure a good test has been conducted Observe the display A number will be displayed The decimal point w2. with a soft cloth Do not allow center tube where sensors detect soap film to be scratched or get dirty NEVER clean with ACETONE Use only soap and warm water When cleaning prior to storage allow flow cell to air dry Shake any access water from cell prior to reattaching to base of mini BUCK If stubborn residue persists remove the bottom plate Squirt a few drops of soap into slot between base and flow cell to ease removal Gently insert a coin or flat screw driver into the ridge between the bottom plate and chamber using leverage around the circumference of the cell until the bottom plate is removed Upon realigning note scribe mark near one of the screw inserts on bottom plate and align this mark with scribe mark on flow cell near air hose inlet Again wet O ring with soap prior to installation To reassemble realign flow cell in case with hose nipples pointing to back of case and reinstall the three bottom screws Section 6 Calibrator Verification The calibrator is factory calibrated using a standard traceable to National Institute of Science and Technology N LS T Attempts to verify calibrator against a glass one liter buret should be conducted at 1000 cc min for maximum accuracy The calibrator is linear throughout the entire range due to the detection technique of fixed volume per unit of time See Section 1 for principle of operation 13 This page is intentionally left Blank 12 Section 3 Start Up P
3. 4 BUCK INC 7101 Presidents Drive Suite 110 Orlando FL 32809 USA Tel 1 800 330 2825 407 851 8602 Fax 407 851 8910 apbuck apbuck com www apbuck com 5 Tawa MAN MINI REV C A P BUCK INC 10 07 2005 Manual Part No APB 108016 BUCK A P BUCK INC THE mini BUCK CALIBRATOR Model M 1 Model M 5 Model M 30 INSTRUCTION MANUAL VERSION 2 7101 Presidents Drive Suite 110 Orlando FL 32809 Tel 407 851 8602 Fax 407 851 8910 apbuck apbuck com www apbuck com This page is intentionally left Blank This page is intentionally left Blank OWNER REGISTRATION Please complete and fax this card to 407 851 8910 to properly register your unit OR register on line at www apbuck com on the service and support page Contact Name Company Address City State Zip Code Country mM _ Phone Number Fax Email Address Purchased From Purchase Date Important List all products purchases and corresponding serial numbers Please obtain an RMA number prior to returning any product Call us at 407 851 8602 and have the serial number and model of the unit available OWNER SURVEY Where did you learn about our products What made you decide to buy O Mailing Product Technology Features Direct Sale JPhone Fax Website Product Quality Reliability Magazine L Price Name amp Issue Date L Trade Show L Distributor Referral Name L Reputation of Company Produ
4. a 16 hour charge IMPORTANT INFORMATION Your mini BUCK Calibrator has new enhanced operational features Effective October 1 2005 Version 2 FEATURES e Pressing the ON and OFF keys simultaneously will display the Version of software code e audible beep will be made upon pressing of keys pads and with the start and stop of bubble test This beeping feature may be turned off by holding the ON key for five seconds e ach flow measurement is a true running average with the current test being added to the previous test and divided by the number of tests performed at that time Average test number is displayed after each bubble test as A 1 A 2 etc Pressing the ON key resets the averaging to start over and displays the current test 9 Upon turn on the display is 8888 briefly as a system check and then becomes 0000 e The circuit board has advanced technology for improved accuracy and to maintain calibration with longer battery life Up to 100 hours of usage on an over night charge Original features of EEEE being displayed if the reading has changed by 5 from previous reading or is out of the flow range remains in Version 2 Section 5 Calibrator Maintenance General Information To clean the flow cell simply remove the three screws holding the flow cell to the bottom of the case Remove the flow cell and gently flush with tap water To prevent scratching the acrylic flow cell wipe only
5. and the Seller s inspection finds the equipment to be defective in material or workmanship the Seller will promptly correct it by either at its option repairing any defective part or material or replacing it free of charge and return shipped lowest cost transportation prepaid if Purchaser requests premium transportation Purchaser will be billed for transportation costs If inspection by the Seller does not disclose any defect in material or workmanship the Seller s regular charges will apply This warranty shall be effective only if installation and maintenance is in accordance with our instructions and written notice of a defect is given to the Seller within such period This warranty is exclusive and is in lieu of any other warranties written oral or implied specifically without limitation there is no warranty of merchantability or fitness for any purpose The liability of the Seller shall be limited to the repair or the replacement of materials or parts as above set forth LIMITATION OF LIABILITY The seller shall not be liable for any claim for consequential loss or damage arising or alleged to have risen from any delay in delivery malfunction or failure of the equipment The Seller s liability for any other loss or damage arising out of or connected with the manufacture sale or use of the equipment sold including damage due to negligence shall not in any event exceed the price of the equipment supplied by us A P Buck Inc rese
6. ap film bubble over the wide dynamic range of the calibrator The sterile nature of the soap is important in the prevention of residue build up in the flow cell center tube which could cause inaccurate readings The use of any other soap is not recommended 14 Section 2 Principle of Operation and Features a Design and Basic Features The mini Buck Calibrator utilizes the principle of measuring the flow rate of gases over a fixed volume per unit of time A Quartz controlled timer is the timing device and the fixed volume is located in the flow cell center tube A microprocessor measures the time for a frictionless soap film to travel from the first sensor to the second sensor infrared which detects the passage up to the tube and then calculates the volume per unit of time The results are displayed in flow rate cc min for the models M 1 and 4 5 Liters Per Minute for model M 30 on a four digital liquid crystal display The decimal point floats to present the data in the proper range The timer is capable of detecting a soap film less than 80 microsecond intervals This speed allows under steady flow conditions an accuracy of 0 5 of any display The unique flow cell can create a soap film over a range of M 1 0 1 to 300 cc m M 5 1 to 6000 cc m M 30 0 100 to 30 00 LPM The flow cell is spill proof when properly filled b Understanding the Display Results A unique feature of the microcomputer software program is data displa
7. as the soap film is simply suspended across the tube cross section and moves with the gas flow rate Mass is not affected This leaves pressure and temperature These are expressed by Boyle s Law P V P2V2 and Charles Law V V T2 T No pressure changes from the ambient during a test as the soap film is practically frictionless Temperature has no influence in this type of flow measurement when all elements are at an ambient This includes the Calibrating device the flow of gas and room temperature These conditions are the general circumstances in which tests are performed Conclusion The detection method of measuring flow rates of gases over a fixed volume per given unit of time is for all practical purposes independent of all variables in the Ideal Gas Law Thus the mini Buck Calibrator serves as a primary standard calibration method Lippman Morton The Industrial Environment its Evaluation and COPYRIGHT PROTECTION OF DOCUMENT Control U S Department of Health Education and Welfare NIOSH 1973 Copyright 2005 A P Buck Inc This operating and service manual and the data Ch 11 101 pp enclosed herein are not to be reproduced or used in whole or in part by anyone written I permission of A P Buck Inc 16 5 b Accuracy of Gaseous Flow Measurements To properly evaluate the accuracy of flowing gases two parameters must be considered First the steadiness of the flow rate must be known Practically every ty
8. ase include a purchase order marked Repair Cost not to Exceed 295 00 Without Customer Authorization Also include company name return shipping address contact name and phone number serial number of unit date of purchase and description of any problems Return to A P Buck Inc 7101 Presidents Drive Suite 110 Orlando FL 32809 ATTN RMA 15 Section 7 Power Supply The battery supply utilizes 4 NiCad AA Cell batteries The unit will operate up to 100 hours on a fully charged battery The unit may also be operated directly from the AC charger when batteries are low Low battery light will indicate the power supply is too low for accurate results Charge battery pack for 16 hours minimum using the BUCK stan dard charger A special power saving feature is the Automatic Shut Off After 7 minutes of non use the mini Buck will shut off automatically Section 8 Precautions Warnings Avoid the use of chemical solvents on flow cell calibrator case and faceplate Generally soap and water will remove any dirt Never pressurize the flow cell at any time with more than 25 inches of water pressure Do not leave A C adapter plugged into calibrator when not in use as this could damage the battery supply Hose fitting covers help to reduce evaporation of soap in the flow cell when not in use The mini BUCK Calibrator Soap is a precisely concentrated and sterilized solution formulated to provide a clean frictionless so
9. ct Availability Service Support Comments 18 Table of Contents Section Page 1 Analysis of Air Flow Calibration a Physics of Measurement 5 b Accuracy of Gaseous Flow Measurements 6 2 Principle of Operation and Features 7 Important Information on Version 2 8 3 Start Up Procedure 9 4 Calibration of Air Flow Sources with the mini Buck 11 5 Calibrator Maintenance 12 6 Calibrator Verification 12 7 PowerSupply uyu a 13 8 Precautions Warning 13 9 Parts List and Service Policy 14 Warranty and Limitation of Liability 15 Owner Registration 18 This page is intentionally left Blank This page is intentionally left Blank Section 10 WARRANTY The seller warrants to the Purchaser that any equipment manufactured by it and bearing its name plate to be free from defects in material or work manship under proper and normal use and service as follows if at any time within 1 year from the date of sale the Purchaser notifies the Seller that in his opinion the equipment is defective and returns the equipment to the Seller s originating factory prepaid
10. ill be appropriately placed Read section 3 b on features concerning data display After a 3 second delay from the time the final sensor is tripped an other test can be performed Repeat Steps 5 through 8 for minimum of 3 tests Note If difficulty is encountered in making a clean single soap film rise up the center tube a check level of soap in flow cell Section 3 C b If soap is cloudy not clear change the soap solution and clean flow cell 11
11. in of flow 0 06 is equal to I cc min change or 0 1 accuracy Repeatability is strictly a function of the technicians skill Mathematically it would seem 0 1 accuracy could be obtained using this large volume and a skilled technician with a 1 000 cc min steady source Of course if the volume is smaller than 1 000 cc or the flow is faster the percent of the accuracy is further reduced by this manual method To summarize the accuracy of measuring air flow relies on quality measurement tools such as NIST traceable buret and crystal control stop watch A constant air flow source and a reliable method of detection are the final requirements to achieve repeatable and accurate flow readings 6 Section 9 mini BUCK Parts List 1 A C Adapter Charger 120V APB 108010 230V APB 108012 2 Soap 8 oz Bottle of soap APB 107030 3 Soap dispenser bottle APB 107032 4 Instruction Manual APB 108016 5 Air inlet caps Pkg of two APB 107014 6 A Cell Battery Pack 4 in line APB 108015 7 Carrying Case APB 108000 Note MINIMUM ORDER 25 00 FOB Orlando Florida SERVICE POLICY for Out of Warranty Work The company reserves the right to proceed with repairs for parts and labor up to a maximum cost of 295 00 without notifying the customer If major components must be replaced the customer will be notified before repairs are performed and actual costs provided for his or her approval of needed work When a Calibrator is returned ple
12. pe of pump creates some pulsing of the flowing gases Second the rate of flow can drift up and down over some range Current battery powered personal air sampling pumps use various techniques to dampen pulsing and special circuitry to monitor pump speed thereby attempting to generate constant and steady flows The mini Buck Calibrator is an automation of the classic technique of using a soap film seal to measure flow over a predetermined volume in a known time A microprocessor operating at 6 megahertz per second detects the passing of the soap film seal over the established flow tube volume and automatically calculates the rate of flow The typical apparatus 1 000 ml buret using a stopwatch can be significantly reduced in size since the microprocessor can detect and measure the speed at 80 microsecond intervals Compare this speed to a technician s response time With good precision on a stopwatch he or she could be repeatable within 50 000 microsend 0 05 seconds 625 times slower than the microprocessor Consider this analysis 1 000 cc buret NIST traceable 0 01 second stopwatch crystal controlled with clock accurate to 15 sec per month 1 000 cc min steady flow source constant flow 1 cc min Example Measure the flow rate using 1 000 cc buret by a skilled technician All devices are at a constant room temperature Test Time Actual Flow Rate 1 60 06 sec 999 0 cc min 2 60 00 1000 3 59 94 1001 Note At 1 000 cc m
13. rocedure Read the previous section of Principle of Operation if unfamiliar with device Soap volume is not critical therefore a measured amount is not necessary The proper amount is that which is sufficient to create a bubble Simply pour a small amount of soap through the bottom nipple to thoroughly cover the bottom of the flow cell and attach air source to nipple bottom nipple for pressure top nipple for vacuum Excessive amount of soap may cause a continuous stream of bubbles to go up the center tube at high flows NOTE Tip the Min BUCK with the bottom hose pointed to the floor for excess soap to be expelled Only the proper amount will remain C Wet flow cell by connecting a pump flowing at 1000 to 2000 cc min for Model M 5 and 5 LPM for Model M 30 Initiate soap film up center tube by rapidly pressing button down and releasing Repeat this procedure until bubble doesn t break The tube is now wet and tests at any range may be conducted One minute warm up time is all that is required of the mini Buck This page is intentionally left Blank 10 Section 4 Calibration of Air Flow Sources with The mini Buck These instructions apply to all models The range for each are Model M 1 0 1 to 300 cc min Model M 5 1 000 to 6000 cc min Model M 30 001 to 30 00 Liter per Minute The instructions relate to industrial hygiene air sampling It basically applies to any gases flow rate measurements 1 ih
14. rves the right to make changes at any time without notice in prices colors materials specifications and models and to discontinue models Section 1 Analysis of Air Flow Calibration a Physics of Measurement At room temperature all gases obey to a very close approximation the ideal gas equation PV nRT where P is the pressure in newtons per square meter V is the volume in cubic meters n is the number of moles of gas R is the empirically determined gas constant with the approximate value 8 31 joules mole degrees Kelvin and T is the temperature in degrees Kelvin The method of measuring flow rates in the mini Buck Calibrator is the technique known as the soap film bubble test A frictionless soap film is suspended perpendicular to the air flow up a small bore tube This film forms a complete seal across the tube The effect causes the soap film to move along the tube at exactly the same rate as the air flow Knowing a measured distance and tube bore size a volume can be calculated Thus a flow rate can be determined by the movement of soap film across a fixed volume per unit of time This technique is classified as a Primary Standard By comparing the four variables of the Ideal Gas Law against this detection technique the validity of measurement can be accessed The volume v is known and fixed therefore cannot change or be considered variable The mass m of the gas being measured is not changed in this technique
15. y On initiation the mini Buck display will present 8888 s for 3 seconds and then display 0000 s with no decimal point indicated A series of are displayed while a test is in progress During sequential tests the previous reading is added to the current test as a running total The letter A appears after each test display the number in the averaging If the previous reading and current reading are different by more than 5 a series of EEEE s will flash four times on the display and then display the actual last rest result The next flow readings will start this averaging technique over again If individual readings are desired without averaging the ON button may be pushed to reset the unit to 0000 following each test The flashing numbers on the display after a test are for three seconds duration The purpose is to allow sufficient time for the soap to return to the bottom reservoir c Battery saver Another feature of the mini Buck is the battery saver automatic shut down If a test is not conducted within approximately 7 minutes from turn on the Calibrator will turn itself off Continuous use of the batteries is rated at 100 hours The unit may also be operated directly from the A C charger when batteries are low All units should be given an initial 16 hour charge prior to use A low battery light will indicate when it is time to recharge the battery If stored for a period of 30 days or more unit will require
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