Table 3-1. Performance Specifications
STEP CHANGE
RESPONSE
TIME TO REACH
20% OF SCALE-
OXYGEN &
TOXICS
Less than 12 seconds (typically 6 seconds)
Less than 20 seconds (ETO)
TIME TO REACH
50% OF SCALE-
OXYGEN &
TOXICS
Less than 30 seconds (typically 12 seconds)
Less than 45 seconds (ETO)
TIME TO REACH
50% OF SCALE-
COMBUSTIBLES
Less than 10 seconds
TIME TO REACH
90% OF SCALE-
COMBUSTIBLES
Less than 30 seconds
HUMIDITY
15 to 95% RH, non-condensing, 24 hours or
less
35 to 95% RH, long term
SENSOR LIFE
CATALYTIC
COMBUSTIBLES
3 years, Typically
OXYGEN
&TOXICS
2 years, Typically
FULL
REPLACEMENT
WARRANTY
1 year; 2 years for IR Combustibles (see
"MSA Instrument Warranty" in this manual)
WIRING
REQUIREMENTS
mA OUTPUT
OXYGEN &
TOXICS
2-wire or 3-wire
COMBUSTIBLES
3-wire
POWER INPUT
(for power input
with internal
relays, see
Appendix A)
mA VERSIONS
OXYGEN &
TOXICS
7 VDC 30 mA max
12 VDC 26 mA max
24 VDC 24 mA max
CATALYTIC
COMBUSTIBLES
7 VDC 450 mA max
12 VDC 200 mA max
24 VDC 160 mA max
IR
COMBUSTIBLES
7 VDC 600 mA max
12 VDC 350 mA max
24 VDC 200 mA max
SIGNAL OUTPUT 4-20 mA
COMBUSTIBLES
3-wire current source
OXYGEN &
TOXICS
2-wire current sink or
3-wire current source
Chapter 3, Specifications
3-3
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