65-2643RK-05-04 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
Oxygen: 0 - 25.0% volume, 0.1% increments
Alarm Settings (Alarm 1/Alarm 2)*
19.5% volume (decreasing)/23.5% volume (increasing)
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: 500 ohms impedance max
-24 VDC: 1000 ohms impedance max
•
RS-485 Modbus
Operating Temperature
-20°C to 45°C
Accuracy
± 0.5% O
2
*
These are the RKI factory settings. You can change the alarm settings in Configuration Mode.
See “Viewing & Changing M2A Parameters” on page 27.
