RKI Instruments M2A - Manual (Page 8)

3 M2A Transmitter Operator’s Manual
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.
Input Power 10 - 30 VDC
Controls • Three push button switches
• Three magnetic switches for non-intrusive calibration
Weight 4.5 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
Explosion Proof Non-Explosion Proof
Operating Temperature
LEL -40°C to 75°C N/A
Oxygen -20°C to 45°C -20°C to 50°C
H
2
S -40°C to 40°C -40°C to 50°C
CO -5°C to 40°C -20°C to 50°C
Toxic (ESM-01) N/A -10°C to 40°C
Infrared LEL -20°C to 50°C -40°C to 50°C
Infrared CO
2
-20°C to 50°C -40°C to 50°C
Accuracy Catalytic Combustible Gas:
± 5% of reading or ± 2% LEL (whichever is greater)
IR Combustible Gas/IR CO
2
:
± 5% of reading or ± 2% of full scale (whichever is greater)
Oxygen:
± 0.5% O
2
Hydrogen Sulfide:
± 5% of reading or ± 2 ppm H
2
S (whichever is greater)
Carbon Monoxide:
± 5% of reading or ± 5 ppm CO (whichever is greater)
ESM-01 Toxic Sensors:
± 10% of reading or ± 5% 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 Parameters” on page 31.
Table 1: M2A Specifications