65-2640RKSS-04S M2A Transmitter Operator’s Manual
7
Specifications
Table 1 lists specifications for the M2A.
WARNING: When using the M2A, you must follow the instructions and warnings in this manual to assure
proper and safe operation of the M2A and to minimize the risk of personal injury. Be sure to
maintain and periodically calibrate the M2A as described in this manual.
Table 1: M2A Specifications
Target Gas/Detection Range
Combustible Gas (methane calibration standard):
0 - 100% LEL, 1% LEL increments
Alarm Settings (Alarm 1/Alarm 2)*
10 %LEL/50 %LEL
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
-40°C to 50°C
Accuracy
± 5% of reading or ± 2% LEL (whichever is greater)
*
These are the RKI factory settings. You can change the alarm settings in Configuration
