Model 4802A
46
6.3.9 Stability
Adheres to FM Class 6310 & Class 6320 and CSA 22.2 No. 152-M1984. Stabilization
occurs in approximately two (2) minutes.
6.3.10 Response Time
T50 < 8 seconds with 100% LEL concentration of Methane (CH
4
) applied.
T90 < 18 seconds with 100% LEL concentration of Methane (CH
4
) applied.
6.3.11 Warm-up Time
The catalytic bead sensor warm-up time is fifty (50) seconds.
6.3.12 Poisons and Interfering Gases
Sensors require a minimum of 20.9% oxygen for continuous and reliable operation.
Sensors operating in conditions of less than 20.9% Oxygen will provide erroneous or
unstable concentration data.
Fluctuating oxygen concentration during calibration will result in erroneous concentration
readings during system operation. For optimal sensor performance the Oxygen level
during calibration should be consistent with the expected normal ambient atmosphere.
The presence of certain gases and vapors may interfere with sensor operation. General
Monitors has tested and documented some of the known interferents. These include but
are not limited to, low vapor silicon, H2S, heavy hydrocarbons, and light chlorinated
products.
6.3.13 Approvals
CSA certified to CSA 22.2 No. 152-M2984 and Atex
II (2) G
6.3.14 Storage
Place the 4802A in the original storage container that was shipped with the unit. This
container guards against contamination from solvents, lubricants, humidity, etc. In the
case of long-term storage, the 4802A should be stored as above in a cool, dry, place,
preferably between 0 and 20ºC.
6.3.15 Warranty
2 Years
6.4 Mechanical
Specifications
Weight: 11.2 oz.
(318 grams)
Length: 9.9 inches
(251 mm)
Height: 6.825 inches
(173 mm)
Width: 1 inch
(25 mm)
