RKI Instruments M2 Rig Monitor - Manual (Page 7)

M2 Rig Monitor Operator’s Manual 2
Specifications
Table 1 lists specifications for the M2 Rig Monitor.
WARNING: When using the M2 Rig Monitor, you must follow the instructions and
warnings in this manual to assure proper and safe operation of the M2
Rig Monitor and to minimize the risk of personal injury. Be sure to
maintain and periodically calibrate the M2 Rig Monitor as described in
this manual.
WARNING: M2 Rig Monitor detector heads with firmware version 5.0 or later have a
different Modbus register assignment than M2 Rig Monitors with
previous versions of firmware. If you are adding M2 Rig Monitors with
firmware version 5.0 or later to an existing Modbus network installation,
confirm what firmware version is installed in the M2 Rig Monitors
already in the network and if necessary, take all steps required to address
the differences in Modbus register assignments. See “Supported Modbus
Functions” on page 38 for information on the current Modbus register
assignments. The firmware version is shown on the Information Screen
described on page 17.
Table 1: M2 Rig Monitor Specifications
Target Gas/Detection Range Hydrogen Sulfide (H
2
S): 0 - 100 ppm, 1 ppm increments
Alarm Settings
(Alarm 1/Alarm 2) 10 ppm/50 ppm
Construction (housing) Explosion-proof Junction Box, NEMA 4
Sampling Method Diffusion
Input Power 10.8 - 14.5 VDC
Controls • Three push button switches
• Three magnetic switches for non-intrusive calibration
Weight 14 lbs.
Signal Output • 4 to 20 mA, 500 ohms impedance max
• RS-485 Modbus
Accuracy ± 5% of reading or ± 2 ppm H
2
S (whichever is greater)
*
These are the RKI factory settings. You can change the alarm settings in Configuration Mode. See
“Viewing & Changing M2 Rig Monitor Parameters” on page 22.