M2 Rig Monitor Operator’s Manual Part Number: 71-0234RK Revision: D Released: 9/30/14 RKI Instruments, Inc. www.rkiinstruments.
WARNING Read and understand this instruction manual before operating instrument. Improper use of the gas monitor could result in bodily harm or death. Periodic calibration and maintenance of the gas monitor is essential for proper operation and correct readings. Please calibrate and maintain this instrument regularly! Frequency of calibration depends upon the type of use you have and the sensor types.
Product Warranty RKI Instruments, Inc. warrants gas alarm equipment sold by us to be free from defects in materials, workmanship, and performance for a period of one year from date of shipment from RKI Instruments, Inc. Any parts found defective within that period will be repaired or replaced, at our option, free of charge.
Table of Contents Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 About the M2 Rig Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 6: Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1: Introduction Overview This chapter briefly describes the M2 Rig Monitor. This chapter also describes the M2 Rig Monitor Operator’s Manual (this document). Table 1 at the end of this chapter lists the specifications for the M2 Rig Monitor. About the M2 Rig Monitor The M2 Rig Monitor is a fixed mount, continuous-monitoring detector head. All user adjustable parameters may be accessed using push button switches.
Specifications Table 1 lists specifications for the M2 Rig Monitor. Table 1: M2 Rig Monitor Specifications Target Gas/Detection Range Hydrogen Sulfide (H2S): 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.
Chapter 2: Description Overview This chapter describes external and internal components of the M2 Rig Monitor. External Description This section describes the junction box and all external components of the M2 Rig Monitor.
Alarm Strobe/Horn The Rig Monitor has a red alarm strobe light/horn installed in the top conduit hub. The Rig Monitor retains its NEMA 4 rating with the strobe installed. Strobe operation is controlled by the Alarm 1 relay contacts. The relay action settings can be changed in Configuration Mode. Magnetic Wand The magnetic wand is a short plastic rod with a magnet in one end.
The H2S detector is installed in the junction box’s bottom conduit hub and is factory wired to the M2 through the left cable bushing in the M2 junction box with a 25 foot cable for remote installation. The mounting bracket at the top of the junction box is used to mount the junction box. The junction box protects the detector wiring connections.
Internal Description C NC NO F AIL C NC NO ALARM 1 C NC NO ALARM 2 S + PW R/SIG T OXIC A A M2 TRANSMITTER B C RS 485 RS 485 B C TOXIC RKI INSTRUMENTS O XY O XY - PW R/SIG S + This section describes the internal components of the M2 Rig Monitor. The internal components of the Rig Monitor include the terminal PCB which provides for all the wiring connections to the Rig Monitor and the control PCB which displays the gas reading and has the control buttons.
signal may be used by a recording device, gas monitor controller, or programmable controller. The Modbus output may be used to connect the Rig Monitor to a Modbus network. The terminal PCB also controls three relays, one fail and two gas alarm relays. Two columns of plug-in style terminal strips are used to make all wiring connections to the terminal PCB. The column on the left consists of the power/signal, detector, and Modbus terminal strips. The column on the right consists of the relay terminal strips.
Relay Terminal Strips The right column of terminal strips consists of, from top to bottom, the fail, alarm 1, and alarm 2 relay terminal strips. They are three-position plug-in style terminal strips. The relay terminal strips are used to connect devices such as lights and horns that are controlled by the relay contacts. The relay contacts are rated at 115 VAC, 5 amps. The relay contacts may also be used to control higher rated relays.
calibration. They are actuated by bringing the magnetic wand close enough to them to actuate them. Although the magnetic switches have the same functions as the push button switches, it is not practical to use them for operations other than calibration because it is not possible to actuate two magnetic switches at once with only one magnetic wand.
Chapter 3: Installation & Startup Overview This chapter describes procedures to mount the M2 Rig Monitor in the monitoring environment and wire it to input power and devices. Mounting the M2 Rig Monitor Perform the following procedure to install the instrument housing at the mounting site. 9.62 Ø .25 Mouting Holes (2X) 13.50 5.46 6.1 6.8 max 1.5 max 2.75 1.1 3.43 6.56 6.89 Figure 6: Rig Monitor Outline and Mounting Dimensions 1.
• 2. Are the display screen and status lights on the Rig Monitor visible? At the monitoring site, use #10 screws through the Rig Monitor junction box’s two mounting holes to secure the junction box to a vertical surface. Figure 7 shows the outline and mounting dimensions for the Rig Monitor. Hang the H2S detector junction box using the mounting bracket. Ensure that the detector is facing down. To Bottom Cable Bushing To Left Cable Bushing 1.50 Ø .75 .75 Detector Cable 12 VDC Battery Cable 14.
Wiring the M2 Rig Monitor WARNING: Always verify that the power source is OFF before making any wiring connections. The detector leads, junction box connection, power cable wiring, and strobe/horn wiring are all factory wired as shown in the figure below.
4 - 20 mA Recording Device Factory W ired (Shown f or Reference) Power Converter Terminal PCB 4-20 mA out (S) White Alarm Device Power Black Black See Modbus Wiring Red RS 485 A B C White Not Used TOXIC C NC NO FAIL Battery Cable (Factory W ired shown f or Reference) Fail Alarm Device C NC NO ALARM 1 Black (Factory W ired) Alarm 2 Device C NC NO ALARM 2 Blue (Factory Wired) OXY Red (Factory Wired) PWR/SIG S Typical Alarm W iring Shown Black Figure 9: Rig Monitor Field Wiring Conn
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.
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.
actuate. Touching the glass and removing the wand is the same as pressing and releasing a button. Touching the glass and keeping the wand in place is the same as pressing and holding a button. WARNING: NOTE: The M2 Rig Monitor is not an active gas monitoring device during the fresh air adjustment procedure. The 4-20 mA output signal will “freeze” at 3.5 mA and all relays will remain in their non-alarm state while the M2 Rig Monitor is in Calibration Mode.
Chapter 4: Operation Overview This chapter describes the M2 Rig Monitor in normal operation. This chapter also describes the Rig Monitor in alarm 1, alarm 2, and fail conditions and suggests responses to these conditions. Normal Operation Normal operation is defined as follows: • The start-up procedure is complete. • The Rig Monitor is not indicating an alarm 1, alarm 2, or fail condition. • The Rig Monitor is not in Calibration or Configuration modes.
4 - 20 mA Signal Output Operation The output at the S terminal of the power/signal terminal strip is a 4 - 20 mA signal that corresponds to the detection range of the M2 Rig Monitor. During normal operation, this signal tracks the gas concentration on the LCD. There are several circumstances where the signal output will not track the display reading but will behave as follows: • When the Rig Monitor is in its warm-up period, the signal output will be fixed at 3.5 mA (zero).
Table 3: Visual and Audible Alarm Indications Condition Cause Visual Indication(s) Fail • Disconnected or misconnected detector wiring • Display reading at -10% of full scale or lower • Defective components • F LED is on • FAIL message replaces gas reading NOTE: There is a 30 second delay on the fail condition. Low Power DC power source less than 18.5 volts.
Alarm 2 Condition Alarm 2 Condition Indications When the gas reading reaches the alarm 2 setpoint, the Rig Monitor senses an alarm 2 condition. The Rig Monitor alerts you to an alarm 2 condition as follows: • The A2 LED turns on. • The gas reading alternates with the ALARM-2 message. • The alarm 2 relay energizes.
Low Power Condition The 12 VDC battery that is recommended for operation of the Rig Monitor is typically dead before the power converter recognizes a low power condition. As a result, when the Rig Monitor is used with a 12 VDC battery, there will be no low power alarm and the unit will instead shut off once the battery is dead.
Chapter 5: Configuration Mode Overview This chapter describes how to view and change M2 Rig Monitor parameters using Configuration Mode. It is accessed using the program buttons. Configuration Mode includes a 5-minute time-out feature. If you do not press a control button for 5 minutes, the Rig Monitor automatically returns to normal operation. NOTE: If the M2 Rig Monitor returns to normal operation because of a time-out, it enters a warm-up period just as it does when it is first turned on.
Table 4: Configuration Parameters Parameter (Factory Set Value) Description ALARM-1 (10 ppm) The gas reading at which the Rig Monitor initiates an alarm 1 condition. ALARM-1 (activation) (Increase) Indicates if the alarm 1 circuit is activated by gas readings increasing (Increase) or decreasing (Decrease) to the ALARM-1 Level. Note: Changing this parameter will affect the operation of the factory installed strobe/horn. Do not change this parameter from the factory setting. ALARM-1 (relay action) (N.
Table 4: Configuration Parameters (Continued) Parameter (Factory Set Value) Description A2 OffDy (alarm 2 off delay) (0 sec.) The amount of time the Rig Monitor delays turning off the alarm 2 circuit once an alarm 2 condition passes. This parameter appears only if the alarm 2 relay reset setting is set to SELF-RST. It can be set in 1 second increments from 0 - 60 seconds, in 1 minute increments from 1 - 15 minutes, and in 15 minute increments from 15 - 60 minutes.
Chapter 6: Maintenance Overview This chapter describes procedures for performing preventive maintenance, troubleshooting, calibrating the M2 Rig Monitor, and replacing field replaceable parts. Preventive Maintenance This section describes a recommended preventive maintenance schedule to ensure the optimum performance of the M2 Rig Monitor. It includes daily, monthly, and quarterly procedures. Daily Verify a display reading of 0 ppm. Investigate significant changes in the reading.
sample tubing from the calibration cup/splash guard hose barb. 10. When the Rig Monitor display reading falls below the alarm setpoints, return it to normal operation. 11. Store the components of the calibration kit in a safe place. Quarterly Calibrate the Rig Monitor as described in “Calibration” on page 28. Troubleshooting The troubleshooting guide describes symptoms, probable causes, and recommended action for problems you may encounter with the M2 Rig Monitor.
Table 5:Troubleshooting the M2 Rig Monitor Condition Symptom(s) Probable Causes Recommended Action Strobe/ Horn Not Working • The strobe/horn does not activate when an alarm 1 condition occurs. • The strobe/horn is malfunctioning. • The strobe/horn wiring is disconnected or misconnected. 1. Verify that the strobe/horn is wired properly to the alarm terminal strip. 2. If the strobe/horn difficulties continue, contact RKI for further instruction.
Calibration Frequency Although there is no particular calibration frequency that is correct for all applications, a calibration frequency of every 3 to 6 months is adequate for most Rig Monitor applications. Unless experience in a particular application dictates otherwise, RKI Instruments, Inc. recommends a calibration frequency of every 3 months.
Preparing for Calibration NOTE: The following procedure assumes the use of a calibration kit which includes a calibration gas cylinder, a zero air cylinder, a fixed flow regulator with an on/ off knob, and a short piece of sample tubing to connect the regulator to the calibration cup/splash guard. NOTE: While in the calibration program, if there is no switch activity for the calibration time-out period the unit will return to normal operation.
8. Press and release the ENTER button. The Rig Monitor will perform a fresh air adjustment and the display will indicate SPAN w/Cal Gas?. 9. If you applied zero air to the detector, unscrew the regulator from the zero air calibration cylinder. 10. If you applied zero air to the detector, leave the sample tubing connected to the regulator and the calibration cup/splash guard.
Adjusting Strobe/Horn Volume The horn volume on the strobe/horn can be adjusted by doing the following: 1. Disconnect the battery clamps from the + and - terminals of the 12 VDC battery. 2. Loosen the captive screw at the bottom front of the strobe/horn. 3. Grasp the top and bottom of the strobe/horn and push up and out in order to remove the cover. Base Top Captive Screw Push Out Push Up Here Figure 10: Top Case Removal 4.
6. Turn the Audio Select switch so that the selection arrow is pointing to the desired number. 7. Place the cover over the base and push in and down in order to reinstall the cover. Make sure that the cover is sealed to the base by the gasket. 8. Screw the captive screw at the bottom front of the strobe/horn back in. Replacing Components of the M2 Rig Monitor Replacing the H2S Plug-in Sensor 1. Disconnect the battery clamps from the + and - terminals of the 12 VDC battery. 2.
9. Reinstall the junction box cover. 10. Connect the battery clamps to the + and - terminals of the 12 VDC battery. CAUTION: Allow the replacement detector to warm up for 5 minutes before you continue with the next step. 11. Calibrate the replacement detector as described in the Calibration section of this manual.
Chapter 7: RS-485 Modbus Output Overview This chapter describes the M2 Rig Monitor’s RS-485 Modbus output and how to configure the Rig Monitor to make use of it. It also discusses how to wire the Rig Monitor into a Modbus system. The Rig Monitor provides an RS-485 serial communications interface. It is a Modbus Slave Device, supporting 2-wire RS-485 Modbus RTU serial communications. Wiring the M2 Rig Monitor in a Modbus System The Rig Monitor is a 2-wire Modbus RTU device.
Recommended Modbus Wiring The recommended Modbus wiring for the Rig Monitor is illustrated in Figure 12 below. In this configuration, 5 wires are used for wiring the Rig Monitor into a Modbus system. Figure 12 also illustrates typical alarm device wiring.
ID = 128 ID = 1 Modbus Master M2 Termination Jumper Installed M2 Termination Jumper Installed RS-485 RS-485 M2 M2 M2 M2 Termination Jumper Not Installed Termination Jumper Not Installed Termination Jumper Not Installed Termination Jumper Not Installed ID = 2 ID = 3 ID = 4 ID = 127 Up to 128 M2s can be connected without a repeater.
following screen appears. Set Up Modbus? 2. To exit Modbus Mode, press and release the DOWN/NO button. The M2 Rig Monitor will return to normal operation. To continue in Modbus Mode, press and release the UP/YES button. The current ENABLED/DISABLED setting will appear. 3. If you want to change the currently displayed parameter, use the UP/YES and DOWN/NO buttons to adjust it to the desired setting, then press ENTER to continue to the next parameter.
return to the first adjustable parameter. Go back to step 3 and continue. If you want to save the adjustments made, press and release the UP/YES button. Modbus Saved is indicated on the display for a few seconds and the M2 Rig Monitor returns to normal operation. NOTE: All M2 Rig Monitors on a Modbus network must be configured with the same baud rate and parity, and each M2 Rig Monitor must have a unique slave ID.
Table 9: Register 2, Operating State, Alarms & Relays Bit & Field Assignments Bit(s) Value [15:12] Operating State 0 = Undefined 1 = Initialization 2 = Normal 3 = Warm-up 4 = Fail 5 = Calibration 6 = Post-Calibration 7 = Low Power 8 = Setup [11] Gas Type Change 0=Not Changed 1=Changed [10] Configuration Change 0=Not Changed 1=Changed [9] Calibration Activity Flag 0=No Calibration Activity 1=Calibration Activity Has Occurred [8] Fail Status 0 = Fail Not Asserted 1 = Fail Asserted [7:6] Alarm 2 S
Table 9: Register 2, Operating State, Alarms & Relays Bit & Field Assignments (Continued) Bit(s) [0] Value Alarm 1 Relay Status 0 = Not Energized 1 = Energized Register 3 Register 3 is the supply voltage (0.1 volt per count). Registers 4 - 11 The 16 bytes in these registers contain the same ASCII text information that is displayed on the Rig Monitor’s LCD (not NULL Terminated). Register 12 Register 12 is the range (full scale readout). Register 13 Register 13 is the alarm 1 set point.
Register 27 Register 27 is the alarm 1 OFF delay. Integer values are in seconds. Register 28 Register 28 is the alarm 2 trigger. 0=Decreasing 1=Increasing Register 29 Register 29 is the alarm 2 normal relay state. 0=Normally De-Energized 1=Normally Energized Register 30 Register 30 is the alarm 2 relay reset. 0=Latching 1=Self-Resetting Register 31 Register 31 is the alarm 2 ON delay. Integer values are in seconds. Register 32 Register 32 is the alarm 2 OFF delay. Integer values are in seconds.
Register 38 Register 38 is the calibration outcome. Upper=Gas Operation Lower=Air Operation Calibration Outcome Codes: 1=Sensor Missing 2=Sensor Too Weak 3=Signal Too Strong 4=Not Enough Span 5=Negative Reading 6=Span Gas Value Is Not OK 7=Calculated Zero Is Too Low 8=Calculated Zero Is Too High 9=Zero Failure 10=Span Failure 11=Calibration Is Overscale 12=LEL Sensor Offset Is Too High 13=LEL Null Operation Failed 14=Operation Not Performed Register 39 Register 39 is the auto-zero disable.
Function Code 16: Write Registers There are 21 registers in Function Code 16 that can be used to write to the Rig Monitor. This manual only describes Register 16 because it can be used to reset an alarm condition. For a complete description of Function Code 16, request Appendix B from RKI Instruments, Inc. Register 16 Register 16 performs the same functions as the buttons on the Rig Monitor. Among other things, it is useful for remotely silencing alarms.
Parts List Table 11 lists replacement parts and accessories for the M2 Rig Monitor Transmitter. Table 11: Parts List Part Number Description 06-1248RK Calibration kit sample tubing (3/16 in. x 5/16 in.
Appendix A: Control Button Quick Reference Guide The M2 Rig Monitor’s control buttons allow access to operational modes, resetting of alarms, and display of the Information Screen. Table 12 shows which button combinations perform these functions and which parameters are available for adjustment while in the operational modes. While in these modes, display prompts showing a “?” require you to respond by pressing either the UP/YES (for yes) or DOWN/NO (for no) button.
Appendix B: Function Code 16 Registers The M2 Rig Monitor supports Function Code 16 that allows writing to the Rig Monitor. There are 21 registers in this Function Code. The register assignments detailed below were implemented in M2 Rig Monitor firmware version 5.0. Please see revision B of the M2 manual if you have an M2 Rig Monitor with a firmware version previous to 5.0. WARNING: Do not attempt to use registers according to the instructions below with units that have firmware versions previous to 5.0.
Register 9 Register 9 is the alarm 2 relay state. 0=Normally De-Energized 1=Normally Energized Register 10 Register 10 is the alarm 2 relay reset. 0=Latching 1=Self-Resetting Register 11 Register 11 is the alarm 2 ON delay. Integer value is in seconds. Register 12 Register 12 is the alarm 2 OFF delay. Integer value is in seconds. Register 13 Register 13 is the zero suppression. Toxics and LEL: 0%-6% Full Scale Oxygen: 0%-0.7% Oxygen Value must be an integer. Any decimals are omitted.
Register 19 Register 19 is for clearing change flags. When parameters are changed at the M2 Rig Monitor, a flag is raised at the controller. This register can be used to clear those flags. Table 13: Register 19, Clear Change Flags Bit(s) Value & Field [15:2] Unused [1] Write “1” to this bit to clear “Gas Type Changed” flag [0] Write “1” to this bit to clear “Configuration Changed” flag Register 20 Register 20 is the AutoZero Disable.
