Operation
Service Menu
3-88
Model 48
i
Instruction Manual
Thermo Fisher Scientific
ANALOG INPUT CAL: ZERO
DISCONNECT SELECTED INPUT!
SELECTED INPUT: INPUT 1
CURRENTLY: 0.04 V
CALIBRATE INPUT TO ZERO
RANGE AVG DIAGS ALARM
The Analog Input Calibrate Full-Scale screen allows the user to calibrate
the full-scale state of the selected analog input.
●
In the Main Menu, choose Service > Analog Input Cal > select Channel
>
Calibrate Full Scale
. (Hook up a voltage source of 10 V to the
analog input channel.)
ANALOG INPUT CAL: SPAN
PROVIDE VOLTAGE TO INPUT!
SELECTED INPUT: INPUT 1
CURRENTLY: 9.84 V
SET TO: 10.0
0
V
CALIBRATE TO VALUE
RANGE AVG DIAGS ALARM
The O
2
Correction Concentration screen is used to set the oxygen
correction concentration. Acceptable values range from 0 to 20.9%. When
O
2
compensation is enabled, the following equation is applied to all of the
concentration values to generate corrected values (CO COR). The
corrected values may be output on the analog outputs, stored in logging
memory, or output as streaming data. The corrected values are not
displayed on the Run screen on the front panel, only the non-corrected
values:
2
9
.
20
2
9
.
20
*
2
@
O
O
C
O
C
meas
corr
corr
comp
Abbreviations: C is the measured concentration, O2
corr
is the oxygen
concentration that C is corrected to (this value is set by the user in the
SERVICE > O2 CORRECTION CONC menu and defaults to 15%).
O2
meas
is the measured O
2
concentration, which is clamped at 20.8% to
prevent divide-by-zero errors. C
comp
is the corrected concentration (CO
COR) that may be used for analog outputs or datalogging.
●
In the Main Menu, choose > Instrument Controls >
O2 Correction
Conc
.
Analog Input Calibrate
Full-Scale
O
2
Correction
Concentration