MSA TECHNICAL SPECIFICATIONS/CERTIFICATIONS
5.3. Test Gases Table
Instrument version Test gas - Self-test Test gas - Calibration
CO 60 ppm 60 ppm
H
2
S 40 ppm 40 ppm
0
2
<19%
*)
20.8%
*) The self-test can also be conducted where the operator breathes out onto the sensor for about
3 - 5 seconds.
5.4. Oxygen Typical Performance Specifications
Range
0 - 25% 0
2
Resolution
0.1% 0
2
Reproducibility
0.7% 0
2
for 2 - 25%
0
2
Response time 90% of final reading
30 seconds (normal temperature range *).
Three minutes (extended temperature range **)
*) normal temperature range 0-40 °C
**) extended temperature range -20 °C to 0 °C and 40 °C to 50 °C
5.5. Toxic Performance Specifications
Sensor CO or CO STEEL (Carbon Monoxide)
Range 0-1500 ppm
Resolution 1 ppm
Reproducibility ±5 ppm or 10% reading, whichever is greater
(normal temperature range *
±10 ppm CO or 20% or reading, whichever is greater
(extended temp. range **)
Response time 90% of final reading in 60 seconds (normal temp. range *)
Sensor H
2
S (Hydrogen Sulphide)
Range 0-200 ppm
Resolution 1 ppm
Reproducibility +2 ppm or 10% of reading, whichever is greater
(normal temperature range *)
+5 ppm or 20% of reading, whichever is greater
(extended temp. range **)
Response time 90% of final reading
< 30 seconds (normal temperature range *)
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