Alternate Sensor Calibration - Thermo Scientific 48i Instruction Manual

Alternate Sensor
Calibration
Thermo Fisher Scientific
2. From the Main Menu choose Calibration > Calibrate O
and press to set the O
3. Supply the O Span gas to the SAMPLE port on the rear of the
2
analyzer and wait for the O
4. From the Main Menu choose Calibration > Calibrate O
enter the span concentration, and press
Note If you were unable to calibrate the oxygen sensor effectively using
this procedure, recalibrate using the "Alternate Sensor Calibration"
procedure that follows.
Use the following procedure if the standard calibration procedure described
previously fails to calibrate properly or for high altitude (5000m/15400 ft)
calibration.
1. Supply the nitrogen zero gas to the SAMPLE port on the rear of the
analyzer.
2. From the Main Menu choose Calibration Factors > O
set the O background to zero, and press
2
background.
3. Use the screwdriver to adjust zero potentiometer RV1 such that the O
value reads 0.00% O
4. Use the screwdriver to adjust the span potentiometer RV2 fully
clockwise.
5. Supply the O span gas to the SAMPLE port on the rear of the
2
analyzer.
6. From the Main Menu choose Calibration Factors > O
the O coefficient to 1.000, and press
2
7. Use the screwdriver to adjust the coarse span potentiometer RV3 such
that the O reading is 20% greater than the calibration gas value. For
2
example, 25% O span gas should be set to produce an output of
2
30.00% O .
2
background to zero.
2
reading to stabilize.
2
▲
.
2
Optional Equipment
Internal Oxygen (O2) Sensor
Background
2
Coefficient,
2
to set the O coefficient.
2
Background,
2
to set the O
2
Coefficient, set
2
to set the O coefficient.
2
Model 48i Instruction Manual
2
9-3