Tabla de contenido
Idiomas disponibles
Idiomas disponibles
──────────────────────────────────
SENSIBILITY TO OTHER GASES
──────────────────────────────────
The crossed sensibility (K in the following table)
of the catalytic sensor (COMBUSTIBLE gases
version) to the most common gases is reported
in the following table related to the METHANE
(CH4=1).
CAS
Number
CH4 (Methane)
74.82.8
GPL (n-Butane)
106.97.8
CO
630.08.0
(Carbon Oxide)
n-Octane
111.65.9
C
H
(Propane)
74.98.6
3
8
H
(Hydrogen)
1333.74.0 1.21
2
NH
(Ammonia)
7664.41.7 n.a.
3
SO
2
7446.09.5 n.a.
(Sulfur Dioxide)
Tab. 5:
Indicative values of cross sensibility to
different gases for catalytic sensors.
WARNING
*: The K value shown in the table is to be
considered purely indicative. K values for
other gases can be requsted to the
manufacturer.
──────────────────────────────────
ALARM AND PRE-ALARM SIGNALS
──────────────────────────────────
The pre-alarm (10% L.E.L. for hydrocarbons
and 16 ppm for CO) and alarm (20% L.E.L. for
hydrocarbons and 80 ppm for CO) output
signals will be available only if the optional realy
board is inserted on the transmitter.
──────────────────────────────────
SPARE PARTS
──────────────────────────────────
This device is featured with an interchangeable
sensor; for the changing process refer to the
sensor manual. To get information about the
compatible sensors contact the manufacturer.
──────────────────────────────────
ACCESSORIES
──────────────────────────────────
The only accessory available is the field
calibration kit, that allows to correctly convey the
test gas to the sensor. Contact the dealer in
case of necessity.
──────────────────────────────────
WARRANTY
──────────────────────────────────
In the view of a constant development of their
products, the manufacturer reserves the right to
amend technical data and features without prior
notice. The consumer is guaranteed against any
lack of conformity according to the European
Directive 1999/44/EC as well as to the
manufacturer's document about the warranty
policy. The full text of the warranty is available
on request from the seller.
SY-N000000SE 034969 310720
──────────────────────────────────—————————————————————————————————————
CONVERSION %L.E.L. ppm
──────────────────────────────────—————————————————————————————————————
Following, are reported the formulas which allows to calculate the %L.E.L. (%
concentration to measure in ppm and vice versa.
V
%L.E.L. (%
/
) =
V
K*
L.E.L.
(% v/v)
Gas Conc. (ppm)= L.E.L. used gas (%
1.00
4.4
1.94
1.4
Eg. For CH4:
1.79
10.9
2.89
0.8
1.79
1.7
Where:
Gas Conc. (ppm): gas concentration to be detected (in ppm).
4.0
L.E.L. used gas (%
standard EN60079-20-1.
15.0
Gas Concentration (%L.E.L. (%
n.a.
Gas Conc. (ppm)
V
L.E.L. used gas (%
/
) x 100
V
V
/
) x %L.E.L. x 100
V
4400 (ppm)
V
10%(%
/
) =
V
V
4.4(%
/
) x 100
V
V
4400 (ppm)= [4.4 (%
/
)] x [10%(%
V
V
/
): % of the gas volume lower explosive limit to detect; data to find on the
V
V
/
) ): gas concentration to be detected (% of L.E.L. (%
V
Pag. 16/32
V
/
V
/
)] x 100
V
) knowing the gas
V
V
/
)).
V
ENGLISH
Tabla de contenido
