ENMET MX-2100 - Manual (Page 19)

MX2100 ENMET Corporation
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These coefficients, to be programmed for the "Other gases" channel, are calculated with respect to methane, as the instrument
systematically recalculates the values of sensitivity coefficients with respect to that gas.
Table 3: Supplementary sensitivity coefficients to be programmed for MX-2100 "other gases" channel
Gas Empirical Formula LEL UEL Vapor density Coefficient/CH4
Benzene C
6
H
6
1.2% 8.0% 2.7 2.2
Cyclohexanone (CH
2
)5CO 1.3% 9.4% 3.4 3.2
Premium petrol Mixture 1.3% 6.0% >2 2.1
Ethane C
2
H
6
3.0% 15.5% 1.04 1.0
LPG Butane/Propane 1.65% ~9.0% 1.85 1.48
Methylamine CH
3
NH
2
4.9% 20.7% 1.1 1.05
Styrene C
8
H
12
1.1% 8.0% 3.6 2.5
Octane > 2 3.0
Example of use: Detection of Benzene with an MX-2100 instrument:
Select "Other gas" on the combustible channel.
Program the coefficient = 2.2.
Select the standard gas. If it is mineral spirit, select "Other" as the standard gas.
Calibrate the instrument in the normal way, specifying the content for the standard gas used.
Table 4: Gas Range and Alarm Points
Gas & Unit of Measurement Low Alarm High Alarm TWA Alarm TWA Duration STEL Alarm STEL Duration Range
Carbon monoxide, CO, ppm 35 ppm 100 ppm 25 ppm 480 minutes 200 ppm 15 minutes 1000 ppm
Hydrogen sulfide, H
2
S, ppm 10 ppm 15 ppm 10 ppm 480 minutes 15 ppm 15 minutes 100 ppm
Oxygen, O
2
, % by Vol. 19.5%V 23.5%V ------------ ------------ ----------- ------------ 30.0%V
Combustible Gas, % LEL 10% LEL 50% LEL ------------ ------------ ----------- ------------ 100%LEL
Chlorine, Cl
2
, ppm 0.5 ppm 1 ppm 0.5 ppm 480 minutes 1 ppm 15 minutes 10.0 ppm
Hydrogen cyanide, HCN, ppm 4.7 ppm 10 ppm 4.7 ppm 480 minutes 4.7 ppm 15 minutes 30.0 ppm
Hydrogen chloride, HCl, ppm 5 ppm 10 ppm 5 ppm 480 minutes 5 ppm 15 minutes 30.0 ppm
Sulfur dioxide, SO
2
, ppm 2 ppm 5 ppm 2 ppm 480 minutes 5 ppm 15 minutes 30.0 ppm
Hydrogen fluoride, HF, ppm 2 ppm 4 ppm 3 ppm 480 minutes 3 ppm 15 minutes 10.0 ppm
Ozone, O
3
, ppm 0.1 ppm 0.2 ppm 0.05 ppm 480 minutes 0.2 ppm 15 minutes 1.00 ppm
Carbon dioxide, CO
2
, % by Vol. 0.5%V 1.0%V 0.5%V 480 minutes 3%V 15 minutes 5.0%V
Hydrogen, H
2
, ppm 200 ppm 2000 ppm ------------ ------------ ----------- ------------ 2000 ppm
Nitrogen dioxide, NO
2
, ppm 2 ppm 4 ppm 3 ppm 480 minutes 5 ppm 15 minutes 30.0 pm
Nitric oxide, NO, ppm 25 ppm 50 ppm 25 ppm 480 minutes 25 ppm 15 minutes 300 ppm
CO/H
2
S Combo Sensor
Ammonia, NH
3
, ppm 25 ppm 50 ppm 25 ppm 480 minutes 35 ppm 15 minutes 100 ppm
Arsine, AsH
3
, ppm 0.05 ppm 0.1 ppm 0.05 ppm 480 minutes 0.1 ppm 15 minutes 1.00 ppm
Silane, SiH
4
, ppm 10 ppm 20 ppm 5 ppm 480 minutes 15 ppm 15 minutes 50 ppm