RKI Instruments M2 Rig Monitor - Manual (Page 20)

15 M2 Rig Monitor Operator’s Manual
10. Connect the leads from the recording device to the 4-20 mA out terminal strip as
shown in Figure 9. When connecting to the - terminal, take care to maintain the
existing factory wiring to the - terminal.
11. Re-install the control PCB. Be sure the ribbon cable is routed down below the control
PCB so it will not be damaged by the cover when it is screwed back on.
12. Secure the junction box cover to the junction box.
Wiring into a Modbus Network
If you wish to wire the Rig Monitor into a Modbus network, see “Wiring the M2 Rig
Monitor in a Modbus System” on page 34.
Start Up
Introducing Incoming Power
1. Complete the installation procedures described earlier in this manual.
2. Verify that all wiring connections are correct and secure.
3. Connect the battery clamps to the + and - terminals of the 12 VDC battery.
4. The LCD display will indicate the firmware version when the Rig Monitor is first
powered up and will then count down a one minute warm-up period before normal
operation begins. During normal operation, the display will indicate the target gas
and current gas reading. Verify that the display is indicating the target gas and current
gas reading after the warm-up period is complete and normal operation begins.
NOTE: Allow the Rig Monitor’s detector to warm up for 15 minutes before you
continue with the next section, “Adjusting the Fresh Air Reading.”
Adjusting the Fresh Air Reading
When the Rig Monitor is shipped from RKI Instruments, Inc., it is factory calibrated. If a
full calibration is desired at startup, see “Calibration” on page 28.
Verify that the Rig Monitor is in a fresh air environment (environment known to be free of
H
2
S and of normal oxygen content, 20.9%).
CAUTION: If you suspect the presence of H
2
S, use the calibration kit and the zero air
calibration cylinder to introduce “fresh air” to the detector and verify an accurate
fresh air setting. See “Calibration” on page 28 for instructions on how to use a zero
air cylinder when performing a fresh air adjustment.
Non-Intrusive Fresh Air Signal Adjustment
If you wish to adjust the fresh air reading without removing the Rig Monitor’s junction
box cover, use the magnetic wand accessory to actuate the magnetic switches instead of
pushing the control switch buttons. To actuate a magnetic switch and perform the same
operation as pressing a control switch button, touch the magnet in the end of the magnetic
wand to the Rig Monitor’s glass cover directly over the magnetic switch you wish to
H2S
0 ppm