Instruction manual

SM425 INSTRUCTION MANUAL 7.0 STARTUP
Figure 7-21 Input Contact Check Display
7.12 Manual Calibration
The SM425 analyzer is calibrated by comparing the measured zero and span gas values to reference
zero and span gas values. There are three types of calibration procedures available:
1. Manual calibration.
2. Semi-automatic calibration which is initiated with the touch panel or a contact input signal. Semi-
automatic calibration uses programmed calibration and stabilization times.
3. Automatic calibration which is initiated by an internal timer.
Manual calibration uses the ZA8F Flow Setting Unit to manually control the calibration gas supply. Semi-
automatic and automatic calibrations use the SM425CAL Automatic Calibration Unit to automatically
supply the calibration gases. The following paragraphs describe the manual calibration procedure. For
details on semi-automatic and automatic calibrations, consult Section 0, “Calibration”.
7.12.1 Setup for Manual Calibration
7.12.1.1 Select a Calibration Mode
To select a calibration mode, use the following procedure:
Press the Setup key in the basic panel display screen to display the Execution/Setup display screen.
Select Maintenance in the Execution/Setup screen then select Calibration setup to display the Calibration
setup display screen as shown in Figure 7-22. Select Mode in this screen, and then select “Manual,”
“Semi-Auto” or “Auto.” Any of these selections will add the manual calibration selection to the calibration
execution display screen.
Figure 7-22 Calibration Setup
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