Sample Flow Cal (5-Lpm) - Teledyne T640 User Manual

4.1.2.

SAMPLE FLOW CAL (5-LPM)

08354A DCN7303
IMPORTANT: Perform Pressure Cal first (Section 4.1.1).
1. Setup your NIST-traceable flow standard transfer device with the appropriate
inlet for the flow to be calibrated.
2. Remove the inlet from Upper Inlet Tube.
3. If the 640X Option is installed, remove the Bypass Flow Tube from the ASC
tube and cap the Bypass Tube fitting.
4. Connect the Flow Standard to the top of the Upper Inlet Tube. Wait at least
one minute for the flow to re-stabilize.
5. With the T640 running, go to the Calibration>Sample Flow Cal menu.
6. Compare the "Measured Flow" in this screen to the Flow Standard.
7. 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.
8. For the T640 with the 640X Option, leave the Bypass Tube disconnected and
proceed to the bypass flow calibration procedure in Section 4.1.3.
9. For the T640 without the 640X Option, leave the Sample Inlet off and
proceed to the PMT adjustment procedure in Section 4.1.4.
Teledyne API T640 PM Mass Monitor 50