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Performance Specification
Performance Specification
5.4.1 Combustible Gas
| Range | 0 to 100% LEL or 0 to 5% CH4 |
|---|---|
| Resolution | 1% LEL or 0.05% vol CH4 |
| Reproducibility | 1% LEL or 0.05% vol CH43% LEL, 0% to 50% LEL reading or 0.15 % CH4, 0.00% to 2.50 % CH4 (normal temperature range) |
| 5% LEL, 50% to 100% LEL reading or 0.25 % CH4, 2.50% to 5.00 % CH4 (normal temperature range) |
|
| 5% LEL, 0% to 50% LEL reading or 0.25 % CH4, 0.00% to 2.50 % CH4 (extended temperature range) |
|
| 8% LEL, 50% to 100% LEL reading or 0.40 % CH4, 2.50 % to 5.00 % CH4 (extended temperature range) |
|
| Response Time (Typical) |
90% of final reading <15 seconds(pentane) <10 seconds (methane) (normal temperature range) |
5.4.2 Oxygen
The oxygen sensor has built-in temperature compensation. However, if temperature shifts dramatically, the oxygen sensor reading may shift. Zero the instrument at the work place temperature for the least effect.
| Range | 0 to 30 vol.% O2 |
|---|---|
| Resolution | 0.1 vol.% O2 |
| Reproducibility | 0.7 vol.% O2 for 0 to 30 vol.% O2 |
| 0.7% O2 for O2 < = 15% (MSHA version only) | |
| 0.5% O2, for O2: 15% | |
| Response time (Typical) |
90% of final reading <10 seconds (normal temperature range) |
| Oxygen Sensor Cross-Sensitivity |
The oxygen sensor has no common cross-sensitivities |
5.4.3 Carbon Monoxide
| Range | 0 - 1999 ppm CO |
|---|---|
| Resolution | 1 ppm CO for 6 - 1999 ppm H2S |
| Reproducibility | ± 5 ppm CO or 10 % of reading, whichever is greater (normal temperature range) |
| ±10 ppm CO or 20 % of reading, whichever is greater (extended temperature range) |
|
| Response Time (Typical) |
90% of final reading <15 seconds (normal temperature range) |
| TEST GAS APPLIED | CONCENTRATION (PPM) APPLIED |
CO CHANNEL % CROSS-SENSITIVITY |
|---|---|---|
| Hydrogen Sulfide (H2S) | 40 | 0 |
| Carbon Monoxide (CO) | 100 | 100 |
| Nitric Oxide (NO) | 50 | 84 |
| Nitrogen Dioxide (NO2) | 11 | 0 |
| Sulfur Dioxide (SO2) | 9 | -4 |
| Chlorine (Cl2) | 10 | 0 |
| Hydrogen Cyanide (HCN) | 30 | -5 |
| Ammonia (NH3) | 25 | 0 |
| Toluene | 53 | 0 |
| isopropanol | 100 | -8 |
| Hydrogen (H2) | 100 | 48 |
5.4.4 Hydrogen Sulfide
| Range | 0 - 200 ppm H2S |
|---|---|
| Resolution | 1 ppm H2S for 3 - 200 ppm H2S |
| Reproducibility | ±2 ppm H2S or 10 % of reading, whichever is greater (normal temperature range) |
| ±5 ppm H2S or 10 % of reading, whichever is greater extended temperature range) |
|
| Response Time (Typical) |
90% of final reading <15 seconds (normal temperature range) |
| TEST GAS APPLIED | CONCENTRATION (PPM) APPLIED |
CO CHANNEL % CROSS-SENSITIVITY |
|---|---|---|
| Hydrogen Sulfide (H2S) | 40 | 100 |
| Carbon Monoxide (CO) | 100 | 1 |
| Nitric Oxide (NO) | 50 | 25 |
| Nitrogen Dioxide (NO2) | 11 | -1 |
| Sulfur Dioxide (SO2) | 9 | 14 |
| Chlorine (Cl2) | 10 | -14 |
| Hydrogen Cyanide (HCN) | 30 | -3 |
| Ammonia (NH3) | 25 | -1 |
| Toluene | 53 | 0 |
| isopropanol | 100 | -3 |
| Hydrogen (H2) | 100 | 0 |