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APPENDIX A
FM APPROVAL DESCRIPTION
The following items, functions, and options describe the FM approval.
APPROVAL
Line-of-Sight Infrared Hydrocarbon Gas Detector, Model LS2000.
Receiver with or without Relays
Class I, Div. 1, Groups B, C & D (T4).
Class I, Div. 2, Groups A, B, C & D (T4).
Class II/III, Div. 1 & 2, Groups E, F & G (T4).
Tamb = –50°C to +65°C.
Class I, Zone 1, AEx db IIC T4 IP66/67.
Tamb = –50°C to +65°C.
Type 4X, IP66/67.
Receiver without Relays
Class I, Div. 1, Groups B, C & D (T4).
Class I, Div. 2, Groups A, B, C & D (T3C).
Class II/III, Div. 1, Groups E, F & G (T4).
Class II/III, Div. 2, Groups E, F & G (T3C).
Tamb = –50°C to +75°C.
Class I, Zone 1, AEx db eb IIC T4 IP66/67.
Tamb = –50°C to +75°C.
Type 4X, IP66/67.
Transmitter
Class I, Div. 1, Groups B, C & D (T4).
Class I, Div. 2, Groups A, B, C & D (T3C).
Class II/III, Div. 1, Groups E, F & G (T4).
Class II/III, Div. 2, Groups E, F & G (T3C).
Tamb = –50°C to +75°C.
Class I, Zone 1, AEx db IIC T4 IP66/67.
Class I, Zone 1, AEx db eb IIC T4 IP66/67.
Tamb = –50°C to +75°C.
Type 4X, IP66/67.
Conduit seal required within 18 inches (450mm) of the enclosure.
Performance verified in accordance with FM 6325, ANSI/ISA 12.13.04 for Methane, Propane, and Butane.
LS2000 hazardous location and performance testing was successfully completed down to –55°C.
However, the FM approved rating is limited to –50°C as there are no conduit fittings, cables, or cable
glands that are presently listed for use below –50°C in the US. FM approvals policy does not allow
product temperature ratings to exceed required installation components (such as conduit seals). The
user must ensure that conduit fittings, cables, cable glands, etc. are rated for the expected minimum
ambient temperature of the installation.
ACCURACY
±5% of full scale gas concentration or ±10% of applied gas concentration, whichever is greater.
NOTE
In order to remain within ±5% of full scale gas concentration or ±10% of applied gas
concentration, the maximum misalignment is ±0.8 degrees.
