TSI Instruments AIRFLOW Instruments ProHood PH720 - Page 4

ii
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 .................................................................... 26
Take Back Pressure Compensated Hood Readings ............................................................. 26
Set Deadband On and Off ..................................................................................................... 27
Calibrate the Micromanometer (User Calibration) ................................................................. 27
Select User Calibration or Factory Calibration ...................................................................... 28
Connect and Download Data to an Optional Printer ............................................................. 28
Connect and Download Data to a Computer .................................................................. 29
Data Acquisition (Polling) ...................................................................................................... 30
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
Manifold................................................................................................................................. 47
Cases .............................................................................................................................. 47
Calibration ............................................................................................................................. 48
Error Code ....................................................................................................................... 48
Appendix A. Back Pressure ..................................................................................................... 53
Verifying Flow Measurements ............................................................................................... 53
Appendix B. Actual vs. Standard Air Velocity and Flow Measurements ............................. 55