ii
Select/Set a K-factor for a Tool.............................................................................................21
View/Set Standard Pressure and Temperature ....................................................................21
Set Units of Measure for Temperature, Pressure, Velocity/Flow and Humidity ....................23
Select the RS232 Output Device (Computer or Printer) ....................................................... 23
Set the Baud Rate.................................................................................................................24
Set the Format for Date and Decimal.................................................................................... 24
Set Display Mode for Running Average or Single................................................................. 25
Select Discrete or Continuous Logging.................................................................................25
Turn Back Pressure Compensation On and Off.................................................................... 25
Take Back Pressure Compensated Hood Readings............................................................. 26
Set Deadband On and Off.....................................................................................................26
Calibrate the Micromanometer (User Calibration)................................................................. 27
Select User Calibration or Factory Calibration ......................................................................27
Connect and Download Data to an Optional Printer ............................................................. 28
Connect and Download Data to a Computer ..................................................................29
Data Acquisition (Polling)...................................................................................................... 29
Chapter 5. Changing Flow Hoods ...........................................................................................31
Flow Hood Parts Identification ..............................................................................................31
Hood Assembly..................................................................................................................... 31
Alternate Hood Installation .............................................................................................. 32
Direct Inflow Measurement Hood for Biological Safety Cabinets.................................... 37
Chapter 6. Flow Measurements Using the Capture Hood .....................................................43
Non-Backpressure Compensated Measurements ................................................................ 43
Single Measurements ........................................................................................................... 43
Running Average Measurements.......................................................................................... 44
Backpressure Compensated Measurements ........................................................................ 44
Error Display .........................................................................................................................45
Chapter 7. Maintenance and Troubleshooting...................................................................... 47
Fabric Hood...........................................................................................................................47
Micromanometer ...................................................................................................................47
Velocity Matrix Manifold ........................................................................................................47
Cases .............................................................................................................................. 48
Calibration............................................................................................................................. 48
Error Code.......................................................................................................................49
Appendix A. Back Pressure .....................................................................................................53
Verifying Flow Measurements............................................................................................... 53
Appendix B. Actual vs. Standard Air Velocity and Flow Measurements ............................ 55
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