UNION Instruments GmbH
INCA Analyzer Series
– Instruction Manual
Page 32 of 59
Calibration
Using those gases, the following calibration points can be measured.
Measured variable
CO
2
CH
4
H
2
S
O
2
Calibration point
Zero
B1
S,C
S,C
A1,B1,C
Span
C
B1
A1,B1
S
Mid
A1
A1
Table 5: Calibration points measured by the example of calibration gases
Caution
It is not possible to calibrate the CO
2
channel with ambient air since there is a
cross sensitivity between CH
4
and CO
2
calibrated into the CO
2
channel. For
that reason a CO
2
-zero-calibration with air would destroy this special
calibration and lead to wrong measurements. CO
2
-zero-calibration is only
possible with 100 vol.% CH
4
.
5.1.2
Preparation for calibration
The following materials are required in the calibration process:
Figure 5-1: Requirement for calibration
1. Calibration gases with two-stage pressure regulator (see list of calibration gases)
2. Pressure regulator (input 1-10 bar and output 0-60 mbar)
3. Stainless-steel pipes with 6 mm fitting
4. Manometer with mbar display
5. PTFE tube (4x6 mm)
6. Nullmodem cable (RS-232)
7. Leak test detector
8. PC or laptop with RS-232 interface
9. Screw wrench (9/16 inch for the 6mm fittings)
10.
INCACtrl
– software
1
2
3
4
5
6
