RKI Instruments 65-2641RK-04 - Manual (Page 7)

65-2641RK-04 M2A Transmitter Operator’s Manual 2
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 Hydrogen:
0 - 100% LEL, 1% LEL increments
Alarm Settings
(Alarm 1/Alarm 2) 10 %LEL/50 %LEL
Construction (housing) Explosion-proof Junction Box, NEMA 4
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 Mode. See
“Viewing & Changing M2A Parameters” on page 23.