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Calibration Factors
O
Background
3
Thermo Fisher Scientific
outputs are updated every 5 seconds regardless of the averaging time. An
averaging time of 300 seconds means that the moving average
concentration of the last 300 seconds will be output every 5 seconds. The
lower the averaging time the faster the front panel display and analog
outputs respond to concentration changes. Longer averaging times are
typically used to smooth output data.
The following averaging times are available: 60, 90, 120, 180, 240, and
300 seconds.
In the Main Menu, choose Photometer Setup > Averaging Time.
●
AVERAGING TIME:
CURRENTLY:
SET TO:
OPER
MODE
The Calibration Factors menu displays the calibration factors and is used to
make minor compensations to the O
In the Main Menu, choose Photometer Setup > Calibration Factors.
●
CALIBRATION FACTORS:
>O3 BKG
O3 COEF
RESET USER CAL DEFAULTS
OPER
MODE
The O
Background screen is used to perform a manual adjustment of the
3
instruments zero background. Before performing a background adjustment,
allow the analyzer to sample zero air until stable readings are obtained.
In the Main Menu, choose Photometer Setup > Calibration Factors >
●
O3 Bkg.
90 SEC
120 SEC ?
CHANGE VALUE
SAVE VALUE
DIAGS ALARM
concentration.
3
0.0000
1.000
DIAGS ALARM
Model 146i Instruction Manual
Operation
Photometer Setup Menu
3-33
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Troubleshooting
