08354B DCN7877
Teledyne API T640 PM Mass Monitor
63
SAMPLE FLOW CAL (5-LPM)
Figure 4-3. Sample Flow Cal Menu
IMPORTANT
IMPACT ON READINGS OR DATA
Perform Pressure Cal first (Section 4.1).
Also, avoid using NIST-reference devices that cause a pulsation
(i.e. BIOS) as these will disrupt the T640 flow control feedback
system. Devices that create a constant and small pressure drop are
preferred.
1. If running in an “indoor installation”, decouple the ASC from the sample tube
using the slip coupler.
•
Slide the slip coupler up, and move the instrument over to disconnect
from the ambient sampling line
•
Plug in the “short ambient temperature probe” at the rear of the
instrument in place of the normal ambient temperature probe
o
This is so that the T640 and the flow standard are measuring the
same temperature during the calibration process.
2. If running in an “indoor installation”, but verifying flow from the roof-top, or if
running from an outdoor enclosure where the flow standard is being used
outside:
•
Keep the ambient temperature probe installed
•
Remove the inlet from the Upper Inlet Tube and follow the calibration
procedure
3. Setup your NIST-traceable flow transfer standard device with the appropriate
inlet for the flow to be calibrated.
