65-2658XL-CH4-4 M2A-XL Transmitter Operator’s Manual
Chapter 1: Introduction
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7
Specifications
Table 1 lists specifications for the M2A-XL.
WARNING: When using the M2A-XL, you must follow the instructions and warnings in this
manual to assure proper and safe operation of the M2A-XL and to minimize the
risk of personal injury. Be sure to maintain and periodically calibrate the M2A-
XL as described in this manual.
Table 1: M2A-XL Specifications
Target Gas/Detection Range
Methane: 0 - 100% volume, 1% volume increments
Alarm Settings
(Alarm 1/Alarm 2)*
100%/100%
Construction (housing)
Explosion-proof Junction Box, NEMA 4X
Area Classification
Explosion-proof for Class I, Groups B, C, and D
Sampling Method
Diffusion
Input Power
10 - 30 VDC
Controls
• Three push button switches
• Three magnetic switches for non-intrusive
calibration
Weight
5.5 lbs.
Signal Output
• 4 to 20 mA with impedance maximums listed below
-12 VDC input: 500 ohms impedance max
-24 VDC input: 1000 ohms impedance max
• RS-485 Modbus
Operating Temperature
-20°C to 50°C
Accuracy
± 5% of reading or ± 2% of full scale (whichever is
greater)
* These are the RKI factory settings. You can change the alarm settings in Configuration
Mode. See “Viewing & Changing M2A-XL Parameters” on page 28.
