RKI Instruments M2 Rig Monitor - Manual (Page 19)

M2 Rig Monitor Operator’s Manual 14
7. All of the conduit hubs are used in the Rig Monitor so you will need to uninstall the
power cable from the bottom conduit hub and install a junction box that has multiple
conduit hubs. Install appropriately rated cable bushings in the junction box.
WARNING: Use an appropriately rated junction, conduit, conduit fittings, and
appropriate construction technique to maintain the NEMA 4
environmental rating of the M2 junction box and avoid water entering the
junction box at the conduit hubs.
8. Guide the power wiring through the new junction box to the Rig Monitor and
reconnect it.
9. Guide the wiring of the external alarm through the new junction box to the Rig
Monitor.
10. Connect the leads from the external alarm to the appropriate terminals on the
appropriate relay terminal strip as shown in Figure 9 to obtain the desired operation.
11. Repeat steps 8 and 9 for an additional alarm device.
12. 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.
13. Secure the junction box cover to the junction box.
Connecting Recorders
Perform the following procedures to connect an analog signal recording device to the Rig
Monitor. The output at the 4-20 mA out terminals is a 4-20 mA signal that corresponds to
the detection range of the H
2
S detector.
1. Disconnect the battery clamps from the + and - terminals of the 12 VDC battery.
2. Remove the junction box cover.
3. Grasp the control PCB by its edges.
4. Gently pull until the control PCB is pulled away from the banana jacks. Take care not
to pull too hard and damage the cable which connects the control and terminal PCB’s.
5. Let the control PCB hang by the cable. The terminal strips are now visible on the
terminal PCB. The control PCB may be left hanging while wiring is done.
6. Locate the 4-20 mA out terminals on the power converter below the control PCB. See
Figure 9 to assist you in locating the recorder output terminals. They are labelled 4-20
mA out (S)
and -.
7. All of the conduit hubs are used in the Rig Monitor so you will need to uninstall the
power cable from the bottom conduit hub and install a junction box that has multiple
conduit hubs. Install appropriately rated cable bushings in the junction box.
WARNING: Use appropriately rated junction box, conduit, conduit fittings, and
appropriate construction technique to maintain the NEMA 4
environmental rating of the M2 junction box and avoid water entering the
junction box at the conduit hubs.
8. Guide the power wiring through the new junction box to the Rig Monitor and
reconnect it.
9. Guide the wiring from the recording device through the new junction box to the Rig
Monitor.