TELEDYNE OLDHAM SIMTRONICS Everywhereyoulook DG-TT7-K, Руководство по эксплуатации

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MULTIXPLO AND MULTITOX DETECTORS
OPERATING MANUAL
14 NOSP17665
Revision 02a

Measured at 50% LEL of the considered gas

In % full scale

On the range: -10°C to +40°C.

(In years) Expected values based on “typical” site operating conditions without poison or
corrosive compounds.
Lifetime can significantly vary (better or worse) depending on real site conditions.
 Measure available but full performance may require longer time. See Chapter 2.
 As soon as a gas or vapour is flammable, it is may be sensed by the combustible gas detector.
Sensitivity (regarding LEL range) and the response time depend on the compound. Basically, as
the molecule size increase, the response time increase and the sensitivity decrease.
Table below gives some examples of cross sensitivity:
Detector CH
4
H
2
C
4
H
10
Injected gas CH
4
H
2
C
4
H
10
CH
4
H
2
C
4
H
10
CH
4
H
2
C
4
H
10
Cross sensitivity* 1 0.95 1.7 1.06 1 1.7 0.57 0.54 1
τ
(0-90%) (sec) <15 <10 <20 <15 <10 <20 <15 <10 <20
If
CH
4
(50% LEL) is injected on a H2 detector, the concentration displayed will be 47.2%
(50/1.06)*

For external probe versions, temperature range is limited to -20 / +60 °C

Under conditions of natural diffusion and available on any of the outputs of the device (HART,
4-20mA, ...).