RKI Instruments EAGLE 2 Manual - Manual (Page 277)

EAGLE 2 Operator’s Manual Monitoring in Methane Elimination Mode • 267
6. You will note that if methane elimination is enabled, the Catalytic Sensor
Relative Response screen no longer appears even if the relative response
feature in Setup Mode is turned on. While methane elimination is
enabled, the Catalytic Sensor Relative Response screen will not appear in
Display Mode even if the relative response feature in Setup Mode is
enabled.
7. Continue to press the DISPLAY button until the Measuring Mode screen
appears.
When the instrument is reading in methane elimination, an ME appears in
line with the catalytic combustible channel reading.
8. Allow 2 minutes for the combustible sensor to stabilize.
9. Perform a demand zero. See “Performing a Demand Zero” on page 27 for
instructions.
10. Monitor for the target gas.
11. If you wish to monitor for any other gas while in methane elimination
mode, a conversion factor must be taken into consideration. With the
EAGLE 2 calibrated to hexane, use Table 33 below to determine the
concentrations of other target gases. Multiply the display reading by the
factor in the appropriate column to determine the actual reading for that
gas. For example, if you are using the EAGLE 2 in methane elimination
mode to detect isobutane and the display reads 10% LEL, the actual
isobutane reading is 10% x 0.59 = 5.9% LEL isobutane.
Table 33: Methane Elimination Mode Conversion Factors (Hexane Calibration)
Target Gas LEL Factor PPM Factor Target Gas LEL Factor PPM Factor
Acetone 0.58 1.32 Isobutane 0.59 0.97
Benzene 1.01 1.10 Isopropanol 0.85 1.55
Butyl Acrylate * 1.52 Methane No
response
No
response
Butyl Acetate 1.34 1.58 Methanol 0.58 3.16
2-Butyl Alcohol 0.84 1.30 Methyl Acetate 0.55 1.55
HEX 0%LEL ME
OXY 20.9vol%
H2S 0.0ppm
CO 0ppm