Manual Calibration - Thermo Scientific 42iQHL Instruction Manual

Calibration
Thermo Scientific
than this is indicated due to a change in zero reading, a new multipoint
calibration curve should be generated.
3. Attach a supply of known concentration of NO and NO
generated via an NIST traceable NO working standard and a GPT
system) to the SAMPLE bulkhead (or SPAN bulkhead for instruments
equipped with the zero/span and sample solenoid valve option) on the
rear panel.
4. Allow the instrument to sample the calibration gas until a stable
reading is obtained on the NO, NO
calibration has changed by more than
calibration curve should be generated.
5. When the calibration check has been completed, record the NO, NO
and NO
6. Reconnect the analyzer sample line to the SAMPLE bulkhead.
Manual
The Manual Calibration screen allows the user to view and manually adjust
the zero background and span coefficient. These are used to correct the
NO, NO
internal calibration data.
Normally, the zero background and span coefficient are calculated
automatically at the Calibrate Background and Calibrate Span Coefficient
described earlier in the chapter. However, the calibration factors can also be
set manually using the functions as described below.
The following screen is shown in single range mode. In dual or auto range
modes, "High Range" or "Low Range" buttons are displayed to indicate the
calibration of the high or low coefficient. The Adjust High Range Span
Coefficient and Adjust Low Range Span Coefficient screens function the
same way.
values.
x
, and NO readings that the instrument generates using its own
2 x

Manual Calibration

(usually
2
, and NO channels. If the
2 x

10%, a new multipoint
42iQHL Instruction Manual
Calibration
,
2
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