Galvanic Applied Sciences ProTech903, Operation Manual

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Revision 14
144 August 02, 2019
6.6 Calibrating/Validating the Analyzer
The analyzer must be calibrated using known certified standards. The concentration of the
calibration gas should be 50 - 75 % of the full scale required for the analyses. There are three
ways to calibrate the system:
•
Manual Calibration (Section 6.6.1)
• Manually Initiated Auto Calibration (Section 6.6.2)
•
Auto Calibration (Section 6.6.3)
6.6.1 Manual Calibration
If this option is employed, the analyzer is equipped with a manually operated 3-way valve that
can be used to introduce calibration gas to the analyzer.
To perform a manual calibration:
a) Place the analyzer in Bypass mode by pressing the Bypass button on the handheld
keypad. This will disable any alarm outputs.
b) Connect calibration gas to the Calibration port of the analyzer. Set the output pressure of
the calibration standard to the same pressure that the sample gas is normally provided at
(this is typically 15 psig).
If, as is usually the case, the analyzer is running in auto sequence mode,
when calibration gas is introduced all outputs and data logs will be
updated with information that is generated while the calibration gas is
running. If this is not desired, then the analyzer can be placed in Reference
Mode. While the analyzer is in Reference Mode, any data will be logged as
Reference data, not as stream data. To place the analyzer in reference
mode, use the GUI to initiate the Reference 1 Manual sequence (Section
5.10).
If the analyzer is to be calibrated while the analyzer is still running the auto
sequence, it is important to disable the High High alarm if the calibration
gas is higher than the alarm setpoint.
c) Turn the 3-way valve to introduce calibration gas to the analyzer.
d) Allow the analyzer to analyze the calibration gas until the readings become stable. This
typically takes 15 to 30 minutes.
e) Once the readings become stable, note of the current analyzer reading.
f) To calibrate the analyzer, an adjustment must be made to the analyzer’s
Gain Factor
on
the
Streams
tab (Section 5.10) or on the hand held keypad. The new Gain Factor can be
calculated by the below formula: