ENMET PGD2 - Manual (Page 14)

ENMET Corporation PGD2
11
6.11 Flammable Display
Note : From software version 1.20 this facility can be disabled via the PC configuration program and may therefore be unavailable on
certain instruments.
The flammable sensor display can be programmed to show the readings for a variety of different flammable gas types, these are
selected via the menu button (Section 6.5). Selection of the appropriate gas to be monitored also automatically adjusts the calibration
factor within the instrument.
From the menu, the user is prompted to press the up arrow key to view the readings: -
Sequential operation of the up arrow key shows in turn the flammable display options e.g.: -
To select, press the
right arrow key when the required gas is being displayed.
Confirmation of the selection can be made by switching the instrument off and then on and observing the display as illustrated in
Section 6.1.
A typical list of flammable gas and vapors types available through the menu is given in the table below. Additional gases may be
added using optional software upgrades. For reference, the lower explosive limit (LEL) in % by volume for each gas is listed. In some
cases there are slight differences between the accepted values of the % by volume concentrations which equal the 100% LEL of some
gases and vapors depending upon the international source of such technical data.
Gas Range in % Vol
Methane 5.0 to 4.4
Ethane 3.0 to 2.5
Propane 2.1 to 1.7
Butane 1.6 to 1.4
Pentane 1.5 to 1.4
Hexane 1.2 to 1.1
Heptane 1.1 to 1.1
Nonane 0.8 to 0.7
Methanol 6.0 to 5.5
MEK (Butanone) 1.8 to 1.7
Ketone
Ethylene 2.7 to 2.3
Iso Propyl Alcohol 2.0 to 2.0
Propylene (Propene) 2.0 to 2.0
Triethylamine 1.2 to 1.2
User*
* The “user” option allows gases not on the above list to be configured into the instrument. This is achieved by use of the PGD2
Interface Unit option in conjunction with a PC. A calibration factor for the gas is required, contact ENMET for further information.
FLAM DISPLAY
PRESS [ ] KEY
METHANE
PRESS [ ] KEY