ABB Advance Optima magnos206 Operator's Manual page 157

Caldos27: Single-Point Calibration with Standard Gas
Single-Point
Calibration with
Standard Gas
Measurement Range
for Standard Gas
Set-points for
Standard Gas
Calibration Method
Calibration Data
Manual Calibration
42/24-10 EN Rev. 9
For measurement ranges ≥ measurement range class 1 in the Caldos27 analyzer
module, standard gas can be used for single-point calibration. This standard gas
calibration is carried out exclusively as span calibration and causes an amplifi-
cation correction. Safety-related measurements are excluded from this technique.
Depending on the measurement task involved, the zero- and end-points should be
verified periodically (Recommendation: once a year).
Note: Classification of measurement ranges into class 1 and class 2 is specified in
Data Sheet 10/24-1.20 EN.
When the Caldos27 analyzer module is ordered with standard gas calibration, the
factory-set measurement range for the standard gas is 0–60,000 rTC (rTC = relative
thermal conductivity). During basic calibration in the factory one standard gas is
calibrated in this measurement range. Due to sensor tolerances the values of other
standard gases can differ by up to 5 % from this scaling (see following table for
set-points).
N 10,000 rTC Ar
2
Air 10,070 rTC CO
Standard gas calibration is fundamentally a substitute gas calibration without zero
calibration (see also "Calibration Methods" section, page 8-A-10). The correction
values are transferred to all the analyzer module's sample components and meas-
urement ranges.
Calibration data for manual calibration
Calibration method
Zero component
Span component
Test gas concentration
Calibration data for automatic calibration
Calibration method
Single zero calibration
Single span calibration
Common zero and span calibration
Test gas concentration
1) Though standard gas calibration is carried out exclusively as span calibration,
standard gas must also be chosen as zero component.
2) Settings of sample components and measurement ranges for zero and span
calibration are taken over from the calibration data for manual calibration.
3) See table "Set-points for Standard Gas"
Manual standard gas calibration must be carried out exclusively as span
calibration (see also "Analyzer Module Manual Calibration" section, page 8-D-1).
Chapter 8: Gas Analyzer Calibration
7,200 rTC CH
4
7,500 rTC He
2
Substitute gas calibration
Standard gas
Standard gas
Value depending on standard gas
Substitute gas calibration
never
always
never
Value depending on standard gas
14,000 rTC H 60,000 rTC
2
50,000 rTC
1)
2)
3)
3)
8-C-3