TELEDYNE OLDHAM SIMTRONICS Everywhereyoulook DG-TT7-K, Operating Manual

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MULTIXPLO AND MULTITOX DETECTORS
OPERATING MANUAL
NOSP17665
Revision 02a
13
3 Performances
Expected lifetime in standard conditions:
•
>5 years for DG-TX7
•
>10 years for DG-TT7-K
This lifetime can be reduced in case of exposure to dusty environments.
For catalytic version, some compounds are known to poison sensors. These
include, organometallic, silicone and some halogenated compounds
PERFORMANCES
DG-TX7-X DG-TT7-K
Detector CH4 H2 C4H10 H
2
CO
2
He
Ranges 100 % L.E.L.
(5.0 %vol)
100 % L.E.L.
(4.0 %vol)
100 % L.E.L.
(1.9 %vol)
5%vol
20%vol
100%vol
20%vol 5% vol
20% vol
100% vol
Relative sensibility 1.70

1.70

1.00

τ
(0-90%) (sec) 
< 15 < 10 < 20 < 10 < 30 < 10
Zero point stability  < 3 < 3 < 3 < 3 < 3 < 3
Sensibility drift

< 3 < 3 < 3 < 3 < 3 < 3
T° range (°C)  -40 / +65 -40 / +65 -40 / +65 -40 / +65 -40 / +65 -40 / +65
Temperature zero drift

< 2 < 2 < 2 < 3 < 5 < 3
Temperature sensitivity drift

< 3 < 3 < 3 < 3 < 5 < 3
Linearity

< 3 < 1 < 3 < 2 < 2 < 2
Repeatability  < 1 < 1 < 1 < 1 < 1 < 1
Expected service life  >5 >5 >5 10 10 10
Relative humidity (% HR) 0 – 95 % condensation free 15 – 95 % condensation free
Pressure range Pa
±
10%
Cross sensitivity All inflammable compounds  All gases with either very high or very low thermal
conductivity
Poisons Silicon compounds, certain halogen compounds,
and some organometallic compounds.
None
Effect of O
2
–enriched or
depleted atmospheres
15 % O
2
min. 10 % O
2
min. 15 % O
2
min. None
Biasing time  90 sec 120 sec