NDIR Gas Analyzer | Instalation |
|
|
| Without O2 |
| Sensor |
measurement. | of 90 to 100% on |
| the measuring |
| range |
|
|
Span gas for O2 |
|
measurement |
|
| — |
|
|
Built-in O2
Sensor
90 to 100% on the measuring range.
Gas with conc. of 90 to 100% on the measuring range or atmospheric air (21% O2).
(O2 gas of 95 to 95.5 vol% for reverse range O2 measurement.)
External O2
Sensor
90 to 100% on the measuring range.
O2 gas at 1 to 2%
3.4.4 Internal Purging of the Instrument Housing
The internal housing does need not be purged except under the following conditions:
1.A combustible gas component is contained in the sample gas.
2.Corrosive gas is contained in the atmospheric air at the installation site.
3.The same gas as the sample gas component is contained in the atmospheric air at the installation site.
In such cases, the analyzer housing should be purged with the instrument air or dry N2.
The purge flow rate should be set to about 1L/min. The purge gas must be free of dust and moisture.
3.4.5 Pressure at Sample Outlet
Pressure at the sample gas outlet should be atmospheric pressure. Make sure there are no kinks or obstructions in the exhaust line.
Teledyne Analytical Instruments | 13 |
