Casio Isokinetic Calculator PDF Operator Manual
The following operation instructions are for the Casio Model CFX-9850G calculator with the Apex Instruments Method 5 Isokinetic Calculations Programs. 1.Turn the calculator on by pressing the ‘AC/ON’ button. The “MAIN MENU” should appear. To access this menu at other times, press the ‘MENU’ button on the calculator. 2.To access the programs from the “MAIN MENU”, either use the ‘up/down/left/right’ arrows to the “PRGM” menu box and press the ‘EXE’ button on the calculator OR push the alpha character ‘B’ button on the calculator (also labeled as the ‘log’ button on the calculator). 3.The “Program List” screen should appear. English unit programs that appear are: “M5ENG”, “M4ENG”, “SATURENG”, “M2ENG”, “M1ENGCIR”, and “ORCALENG”. Metric unit programs that appear are: “M5METRIC”, “M4METRIC”, “SATURMET”, “M2METRIC”, “M1METCIR” and “ORCALMET”. The program listed at the top of the screen will be highlighted.
To access any of these programs, highlight the program by using the ‘up/down’ arrow keys on the calculator and then push the ‘EXE’ button or the ‘F1’ button on the calculator. 4.At this point the user is inside one of the programs. The first statement informs which program the user has entered and prompts the user the press the ‘EXE’ button to continue. As a note, when the “- Disp -” appears on the screen, press ‘EXE’ to continue. The “M5ENG” and “M5METRIC” programs have two subroutines; “‘1’ K-FACTOR” subroutine calculates the ideal nozzle size and then the K-Factor (based on the actual nozzle size), “‘2’ POST-TEST ISOKINETICS” subroutine calculates the post-test isokinetic variation using the data from the actual test run. The data for the “‘1’ K-FACTOR” subroutine is obtained by performing a preliminary velocity/temperature/moisture traverse before the actual test. 1. The next step prompts which subroutine the user would like to enter. The subroutines are described in the paragraph above. To select the subroutine, press the number ‘1’ or ‘2’ and then press ‘EXE’. If you select the “‘1’ K-FACTOR” subroutine, continue on to instruction number 2. If you select the “‘2’ POST-TEST ISOKINETICS” subroutine, skip to instruction number 19. 2. The user is now in the K-FACTOR subroutine. The user is prompted to enter the “DRY GAS METER DELTA H@ (MM H20 / IN H20)”. This value is the orifice calibration factor provided from the meter console calibration data reduction.
Type the number and then press ‘EXE’. 3. The next two prompts ask the user to input the oxygen (O2) and carbon dioxide (CO2) content that are used in the program to determine the molecular weight of the stack gas. This data can be determined by performing an orsat, or similar, analysis per US EPA Method 3. If the exact composition is unknown, the user can estimate the molecular weight using ambient conditions (20.9% O2 and 0.0% CO2). When prompted, enter the value and press ‘EXE’. 4. At the “STACK TEMPERATURE (CELSIUS / FAHRENHEIT)” prompt, enter the value and then press ‘EXE’. 5. At the “BAROMETRIC PRESSURE (MM HG / IN HG)” prompt, enter the value and then press ‘EXE’. 6. At the “STACK STATIC PRESSURE (MM H2O / IN H2O)” prompt, enter the value and then press ‘EXE’. 7. At the “AVERAGE SQUAREROOT DELTA P (“ MM H2O / “IN H2O)” prompt, enter the value and then press ‘EXE’. This value is obtained by averaging the square roots of each Delta P value. In other words, take the square root of each value BEFORE averaging the values. The user can have the calculator compute the average square root by keying in the following string at the prompt: ( “x1+”x2+”x3+…+”xn)/n 8. At the “METER TEMPERATURE (CELSIUS / FAHRENHEIT)” prompt, enter the value and then press ‘EXE’. 9. At the “PITOT TUBE COEFFICIENT” (unitless) prompt, enter the value and then press ‘EXE’. 10. At the “PERCENT MOISTURE” prompt, enter the value and then press ‘EXE’. 11. At the “SAMPLING RATE (USUALLY 21.21 LPM / 0.75 CFM)” prompt, enter the value and then press ‘EXE’. 12. The program calculates the ideal nozzle size for the stack gas conditions the user has entered. Press ‘EXE’ to continue with the program. 13. At the “ACTUAL NOZZLE DIAMETER (MM / IN)” prompt, enter the value and then press ‘EXE’. 14. The program calculates the K-FACTOR given the sampling conditions that the user has entered.
Download Casio Isokinetic Calculator PDF Operator Manual
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