Maintenance and Calibration
Performing a Flow Calibration
Thermo Fisher Scientific
PDM3700 Instruction Manual
5-33
leak and re-test the instrument if the leak check does not initially pass. Do
not operate the instrument if the system does not pass the case leak check.
▲
1.
Remove the PDM3700 cover panel (refer to the instructions earlier in
this chapter for information on opening the case).
2.
Locate the mass transducer chamber of the PDM3700 and the two O-
rings in the top of the chamber (
Figure 5–46
and
Figure 5–47
).
Figure 5–46.
Mass transducer chamber
Figure 5–47.
Mass transducer O-rings
3.
Using the cotton swab, apply the silicone compound to the O-rings.
4.
Install the PDM3700 cover panel (refer to the instructions earlier in
this chapter for information on opening the case) and perform a leak
check.
If the monthly flow audit fails, perform a flow calibration. Tool/materials
needed for this procedure:
●
Flow meter
●
Tubing adapter
●
Flow calibration kit (59-010019)
o
Red (0.028-inch) orifice
o
Black (0.033-inch) orifice
●
Other adapters or tubing as required (to use customer flow meters these
instructions need to be adjusted accordingly)
To lubricate the mass
transducer O-rings:
Performing a
Flow Calibration
