Thermo Scientific 5028i Instruction Manual page 148

Calibration
Calibration Procedure
Flow Calibration
Auto Flow Calibration
Mass Calibration
4-6 Model 5028i Instruction Manual
+/- D PB ports use for Channel B. Enter this span value into the screen
below:
In the Main Menu, choose Service > Pres/Vacuum Calibration >
l
Vac/Flow or Vac/Flow B> Flow Pres Span. Vac/Flow B settings
please refer to Vac/Flow as following description.
Be sure to save the entry and compare the values once more. Repeat as
necessary to within 2 mmHg.
The preferred method of flow rate calibration is the Auto Flow
Calibration.
Place a NIST-traceable volumetric flow meter on top of the instrument
after complete installation (reassembled heater tube, sample tubes, and
inlets). Allow approximately 1-minute for the flow to stabilize. Once
stable, measure and average three individual readings from the reference.
This average observed flow rate from your reference meter should now
be entered in the screen below:
Be sure to save the entry and compare the values once more. Repeat as
necessary to within +/- 2 %. Flow Span B settings please refer to Flow
Span as above description.
Perform the "Leak Test" on page
The Model 5028i is calibrated for mass in the factory using a series of
null and span foils. The mass transfer standard foil sets are available
from Thermo Fisher Scientific, and should be used as part of a QA
Program for performing a QC check on the mass measurements. This
mass foil calibration procedure can be used for QC checks, auditing,
and calibration.
The Mass Calibration submenu is used to view and set the mass
calibration point. The mass calibration screen is visible only when the
5-6 to verify no leaks.
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