08354B DCN7877
Teledyne API T640 PM Mass Monitor
64
4. If the 640X Option is installed, remove the Bypass Flow Tube from the ASC
tube and cap the Bypass Tube fitting.
5. Connect the Flow Standard to the top of the Upper Inlet Tube. Wait at least
one minute for the flow to re-stabilize.
6. With the T640 running, go to the Calibration>Sample Flow Cal menu.
7. Compare the “Measured Flow” in this screen to the Flow Standard.
8. If these values differ by more than 5%, then press the value button in the
“Actual Flow” field, enter the value measured by the Flow Standard, and press
the “Calibrate” button on this screen. The Measured Flow value should change
to closely match the Actual Flow within a few seconds.
9. For the T640 with the 640X Option, leave the Bypass Tube disconnected and
proceed to the bypass flow calibration procedure in Section 4.4.
10. For the T640 without the 640X Option, leave the Sample Inlet off and proceed
to the PMT adjustment procedure in Section 4.5.
When finished, make sure to re-plug in the external ambient temperature probe
before returning to normal sampling.
BYPASS FLOW CAL (11.67-LPM)
(Note: This procedure only applies to the 640x option)
Figure 4-4. Bypass Flow Cal Menu