<7. Startup>
7-12
IM 11M12G01-02EN
7.12 Calibration
To calibrate this instrument, the procedure is to measure zero gas and span gas and set the
instrument to read the known concentrations. The procedure for both zero and span calibration,
or for either zero or span calibration, can be performed manually from the touch display, or can
be performed semi-automatically using contact signal inputs to start calibration, (allowing preset
calibration and stabilization times), or it can be performed automatically at preset intervals.
Manual calibration needs the ZA8F Flow Setting Unit to allow manual supply of the calibration
gases. Semi-automatic and automatic calibrations need the ZR40H Automatic Calibration Unit
to allow automatic supply of the calibration gases. The following sections set forth the manual
calibration procedures. For details on semi-automatic and automatic calibrations, consult
Chapter
“9. Calibration”, later in this manual.
7.12.1 Calibration Setup
“Converter menu” > “Maintenance” to go to Maintenance screen.
Select “Calibration settings”. Select “Calibration mode” then a window opens. Select “Manual”,
“Semi-automatic”, “Automatic, semi-automatic.” Here select “Manual.”
Figure 7.14 Calibration Setup Display
Calibration Gas Concentration Setting
(1) Zero gas concentration
“Calibration settings” > “Zero gas concentration” On the numeric-data entry page, enter an
oxygen concentration value for the zero gas calibration.
(2) Span gas concentration
“Calibration settings” > “Span gas concentration”. On the numeric-data entry page, enter an
oxygen concentration value for the span gas to use for the calibration.
If instrument air is used, enter 21 vol%O
2
value. When using the ZO21S Standard Gas Unit
(for use of the atmospheric air as a span gas), use a portable oxygen analyzer to measure
the actual oxygen concentration. Enter the gained value.
1sh Edition : Mar. 25, 2021-00
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