Detcon FP-100 - Manual (Page 21)

Model FP-100
FP-100 Instruction Manual Rev. 0.0 Page 17 of 30
calibrated with methane and propane occurs in the area: 1.00(Methane) ÷ 1.81(Propane) = 55%. If 40% LEL
propane occurred the sensor output would equal 22.0%.
In all cases remember that these Cal Factor ratios are theoretical. Actual response may vary from sensor to
sensor. Always use the Target Gas as the Cal Gas whenever possible.
Table 2 Gas/Cal Factors
Gas Factor Gas Factor Gas Factor
Acetaldehyde 1.66 Decane 3.05 Dimethyl Ether 1.60
Acetic Acid 1.84 Diethylamine 2.05 Methylethyl Ether 2.27
Acetic Anhydride 2.17 Dimethylamine 1.73 Methylethyl Ketone 2.42
Acetone 1.93 2,3-Dimethylpentane 2.51 Methyl Formate 1.49
Acetylene 1.76 2,2-Dimethylpropane 2.52 Methyl Mercaptan 1.64
Alkyl Alcohol 1.96 Dimethyl Sulphide 2.30 Methyl propionate 1.95
Ammonia 0.79 1,4-Dioxane 2.24 Methyl n-propyl Ketone 2.46
n-Amyl Alcohol 3.06 Ethane 1.47 Naphtha 3.03
Aniline 2.54 Ethyl Acetate 1.95 Naphthalene 2.94
Benzene 2.45 Ethyl Alcohol 1.37 Nitromethane 1.72
Biphenyl 4.00 Ethylamine 1.90 n-Nonane 3.18
1,3-Butadiene 1.79 Ethyl Benzene 2.80 n-Octane 2.67
Butane 1.71 Ethylcyclopentane 2.52 n-Pentane 2.18
iso-Butane 1.93 Ethylene 1.41 iso-Pentane 2.15
Butene-1 2.20 Ethylene Oxide 1.93 Propane 1.81
cis-Butene-2 2.06 Diethyl Ether 2.16 n-Propyl Alcohol 2.12
trans-Butene-2 1.97 Ethyl Formate 2.26 n-Propylamine 2.07
n-Butyl Alcohol 2.91 Ethyl Mercaptan 1.78 Propylene 1.95
iso-Butyl Alcohol 1.89 n-Heptane 2.59 Propylene Oxide 2.18
tert-Butyl-Alcohol 1.34 n-Hexane 2.71 iso-Propyl Ether 2.29
n-Butyl Benzene 3.18 Hydrazine 2.22 Propyne 2.40
iso-Butyl Benzene 3.12 Hydrogen Cyanide 2.09 Toluene 2.47
n-Butyric Acid 2.63 Hydrogen 1.30 Triethylamine 2.51
Carbon Disulphide 5.65 Hydrogen Sulphide 2.54 Trimethylamine 2.06
Carbon Monoxide 1.32 Methane 1.00 Vinyl Chloride 2.32
Carbon Oxysulphide 1.07 Methyl Acetate 2.01 Vinyl Ethyl Ether 2.38
Cyanogen 1.12 Methyl Alcohol 1.16 o-Xylene 2.79
Cyclohexane 2.43 Methylamine 1.29 m-Xylene 2.55
Cyclopropane 1.60 Methylcyclohexane 2.26 p-Xylene 2.55
3.4 Fault Diagnostic/Failsafe Feature
If the ITM should incur a fault, the ITM will drop the mA output to 0mA. This can occur if the ITM detects a
problem with the sensor, detects that there is no sensor connected, or if the ITM has an internal fault. The ITM
will hold this 0mA output until the problem is resolved. If the 100 Series Display is installed, the display will
show an eror code. The error codes are defined in section 5 Troubleshooting Guide.