S
S
S
S
S
ECTION
ECTION
ECTION
ECTION
ECTION
5
5
5
5
5
M
AINTENANCE
AND
C
ALIBRATION
P
ROCEDURES
5-38 O
PERATING
G
UIDE
, TEOM 1405
T
HERMO
F
ISHER
S
CIENTIFIC
Perform the ambient air temperature calibration, pressure calibration and
leak check (Section 3) before executing the flow calibration procedure. To
calibrate (or audit) the main and bypass flows, you will need a
1 1/4-inch flow adapter, a 3/8-inch Swagelok flow adapter and a flow
measurement device.
The reference flow meter, such as a bubble meter, dry gas meter, or mass
flow meter should have been recently calibrated to a primary standard, and
should have an accuracy of ±1% at 3 l/min and 16.67 l/min, and a
pressure drop of less than 0.07 bar (1 psi). If you are using a mass flow
meter, you must make any necessary corrections to translate this reading to
volumetric l/min at the current ambient temperature and barometric
pressure. No adjustment is necessary in the case of a volumetric flow
meter. Thermo Scientific offers the Streamline Pro Multi-Cal system (57-
008887) to measure volumetric flow measurements.
Note.
Note.
Note.
Note.
Note. To audit the total flow, you will need a 1 1/4-inch flow adapter.
Remove the inlet and attach the flow adapter and meter to the top of the
inlet tube (Figure 5-46).
▲
Calibrating the
Calibrating the
Calibrating the
Calibrating the
Calibrating the
Flow Rates
Flow Rates
Flow Rates
Flow Rates
Flow Rates
Figure 5-46.
Figure 5-46.
Figure 5-46.
Figure 5-46.
Figure 5-46.
Flow meter/adapter attached to
top of inlet tube for total flow
audit.
Flow meter/adapter
Flow splitter
Содержание TEOM 1405
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