Maintenance, Service, and Troubleshooting Teledyne API Ultrafine Particle Monitor - Model 651
84 07506C DCN6727
instrument Flow Constant status value on the ADDITIONAL
STATUS screen.
3. Attach an accurate external flow meter such as a bubble meter,
or Gilibrator (brand), or BGI Tetracal (available from TAPI), to
either the Model 651 sample inlet or the aerosol inlet and
measure the inlet flow.
Figure 9-8
External Flow Meter Attached to Model 651
4. From the HOME screen, select STATUS, MORE, ADDITIONAL
STATUS. Observe the Flow Constant value. This is the aerosol
sample flow for the installed orifice.
5. Verify that the measured flow corresponds with the observed
Flow Constant within ±5%, and also add in any uncertainty in
the flow measurement resulting from errors in the accuracy of
your flow meter. If the measured flow still does not compare
with the Flow Constant when the tolerance errors are
considered, refer to the Troubleshooting section of this chapter.
Cleaning the Water Bottle To prevent bacterial growth and potential contamination of the
Model 651, clean the water bottle after every use. To clean the
water bottle, follow these instructions:
1. Disconnect the water fill tubing from the WATER FILL.
2. Empty the water bottle.
3. Wash the water bottle with a mild detergent.
4. Thoroughly rinse out the water bottle.
Aerosol
Inlet