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65-2643RK0504SS M2A Transmitter Operator’s Manual

Figure 7: Outline & Mounting Dimensions, Detector Junction Box

3. Install 3/16 inch I.D. flexible polyurethane tubing to the fitting at the bottom of the calibration adapter/

splash guard and route it to an accessible area that is close to the M2A junction box. See the “Chapter 9:
Parts List” on page 49 for available tubing.

.20 Dia. x .45
Slot, 2X

3/4 NPT
Female,
2X

Oxygen Detector

Calibration Adapter/

Splash Guard

3.66

3.15

2.40

J-Box

1.10

3.34

11.20 m ax

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Содержание 65-2643RK0504SS

Страница 1: ...RKI Instruments Inc www rkiinstruments com 65 2643RK0504SS M2A Transmitter Operator s Manual Part Number 71 0419 Revision E Released 9 9 20...

Страница 2: ...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...

Страница 3: ...r replacement costs local repair costs transportation costs or contingent expenses incurred without our prior approval THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER WARRANTIES AND REPRESENTA...

Страница 4: ...8 Internal Description 11 Chapter 3 Installation Startup 15 Overview 15 Mounting the M2A Transmitter 15 Wiring the M2A Transmitter 17 Start Up 20 Chapter 4 Operation 22 Overview 22 Normal Operation 2...

Страница 5: ...eplacing Components of the Oxygen Detector 37 Chapter 8 RS 485 Modbus Output 39 Overview 39 Wiring the M2A in a Modbus System 39 Using the M2A in a 4 wire Modbus System 42 Modbus Mode 42 Supported Mod...

Страница 6: ...ch is visible through the window in the cover front face and provides a 4 20 mA signal which indicates the target gas reading for use by a gas monitoring controller recording device or programmable co...

Страница 7: ...tings Alarm 1 Alarm 2 19 5 volume decreasing 23 5 volume increasing Construction housing Explosion proof junction box NEMA 4X Area Classification Explosion proof for Class I Groups B C and D Sampling...

Страница 8: ...situations where the detector needs to be installed at an inaccessible location The detector junction box can be installed at the inaccessible location and the M2A junction box can be installed in a m...

Страница 9: ...he magnetic wand to actuate the magnetic control switches so you can perform non intrusive calibration Removing the cover allows you to access the interior of the junction box Detector Junction Box Th...

Страница 10: ...a flame arrestor guard which protects the flame arrestor from damage Unscrew the detector cap to access the plug in sensor for maintenance or replacement A cap gasket seals the interface between the h...

Страница 11: ...A signal that is proportional to the detection range and an RS 485 Modbus output signal The 4 20 mA signal may be used by a recording device gas monitor controller or programmable controller The Modbu...

Страница 12: ...M2A NOTE The detector is factory wired to the M2A See Wiring the M2A Transmitter on page 17 for all wiring procedures related to M2A Modbus Terminal Strip The Modbus terminal strip is a three positio...

Страница 13: ...rminal PCB by lining up its three spacing standoffs with the banana jacks in the terminal PCB mounting standoffs and pushing it onto the banana jacks The jacks retain the control PCB Figure 5 Control...

Страница 14: ...e 5 Fail LED The fail LED turns on when the M2A is experiencing a fail condition A fail condition can be caused by a detector failure or low detector signal Alarm 1 LED The alarm 1 LED is on when the...

Страница 15: ...he site should be easily accessible For the detector junction box select a site where the target gas is likely to be found first For lighter gases mount the detector near the ceiling for heavier gases...

Страница 16: ...yurethane tubing to the fitting at the bottom of the calibration adapter splash guard and route it to an accessible area that is close to the M2A junction box See the Chapter 9 Parts List on page 49 f...

Страница 17: ...e construction technique 9 Guide a two conductor shielded cable or two wires in conduit through the top conduit hub of the detector junction box To make wiring more convenient use wire colors that cor...

Страница 18: ...iring the Detector to the M2A 15 Reinstall the detector terminal strip into its socket 16 If shielded cable is used between the detector junction box and the M2A junction box connect the cable s drain...

Страница 19: ...to prevent water from entering through the top port NOTE If the M2A is being wired to a PLC or DCS device see Appendix B PLC and DCS Device Wiring on page 51 then continue with step 8 Use the followin...

Страница 20: ...ions are correct and secure 3 Turn on the incoming power 4 If necessary turn on the controller or other monitoring device that is connected to the M2A 5 The OLED display will indicate the firmware ver...

Страница 21: ...leasing a button Touching the glass and keeping the wand in place is the same as pressing and holding a button WARNING The M2A is not an active gas monitoring device during the fresh air adjustment pr...

Страница 22: ...inue holding the DOWN NO button to keep the Information Screen on the display The top line indicates the operating voltage that is connected to the M2A The second line indicates the firmware that is r...

Страница 23: ...15 mA Alarm Indications NOTE The M2A includes alarm on and alarm off delay settings for alarm 1 and alarm 2 The alarm indications described in this section operate according to the factory set alarm s...

Страница 24: ...g falls below the alarm 1 setpoint Alarm 2 Condition Alarm 2 Condition Indications When the gas reading reaches the alarm 2 setpoint the M2A senses an alarm 2 condition The M2A alerts you to an alarm...

Страница 25: ...olts or less WARNING While in a low power condition the M2A is not an active gas monitor When the M2A senses a low power condition it alerts you as follows The F LED turns on The message LowPower is i...

Страница 26: ...buttons when the following screen appears 2 If you want to exit Configuration Mode press and release the DOWN NO button and the M2A will return to normal operation If you want to continue in Configura...

Страница 27: ...g at which the M2A initiates an alarm 2 condition ALARM 2 activation Increase Indicates if the alarm 2 circuit is activated by gas readings increasing Increase or decreasing Decrease to the ALARM 1 Le...

Страница 28: ...xample if the zero suppression is 0 5 the M2A will display a reading of 20 9 for gas readings from 20 4 to 21 4 It is settable from 0 to 6 volume FILTER 5 secs The filter feature helps smooth out jump...

Страница 29: ...d on Selecting the Gas Type 1 While in normal operation or during the warm up sequence press and hold the UP YES and DOWN NO buttons for five seconds Release them when the following screen appears 2 I...

Страница 30: ...d move to the next one Use the UP YES and DOWN NO buttons to adjust a setting See Chapter 5 Configuration Mode on page 26 for a complete description of Configuration Mode 7 When you have reviewed and...

Страница 31: ...he UP YES button for 5 seconds to enter Calibration Mode but since a calibration is required only a momentary push is needed to enter Calibration Mode after changing the gas type 11 See Calibration on...

Страница 32: ...mptoms probable causes and recommended action for problems you may encounter with the M2A NOTE This troubleshooting guide describes M2A problems only If the M2A is connected to a controller see the co...

Страница 33: ...hielded See Wiring the M2A Transmitter on page 17 2 Verify that the detector wiring is correct and secure 3 Increase the filter setting in Configuration Mode 4 Increase the zero suppression setting in...

Страница 34: ...lash guard to connect the regulator to the calibration adapter splash guard 5 Turn the regulator s on off knob counterclockwise to open the regulator Gas will begin to flow Take note of the time or st...

Страница 35: ...entration may be used instead of a 100 nitrogen cylinder to set the zero reading NOTE While in the calibration program if there is no switch activity for the calibration time out period the unit will...

Страница 36: ...ZERO w Cal Gas Skip to the next section Adjusting the Zero Setting 4 Screw the zero air cylinder into the fixed flow regulator 5 Use the flexible tubing coming from the calibration adapter splash guar...

Страница 37: ...of the 1 minute period the REMOVE CAL GAS message will stop appearing and the M2A will return to normal operation 10 Disconnect the calibration adapter splash guard s flexible tubing from the regulat...

Страница 38: ...s of the replacement detector through the bottom conduit hub of the detector junction box then screw the mounting threads of the detector into the conduit hub If necessary for environmental conditions...

Страница 39: ...to be connected together RS 485 repeater s should be used such that no more than 128 M2As reside on any given network segment CAUTION The network segment can only support 128 units if RKI M2As are be...

Страница 40: ...e This should only be done if wiring for a system that is being replaced is already installed and it is not practical to run another wire See Figure 11 below for this wiring configuration In this conf...

Страница 41: ...in an M2A that is at the end of a Modbus line Any M2A in a Modbus system that is not at the end of a line must have the termination jumper removed see Figure 12 Figure 13 below Figure 12 Multiple M2As...

Страница 42: ...atically returns to normal operation NOTE If the M2A 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 1 While in normal operation...

Страница 43: ...normal operation NOTE All M2As on a Modbus network must be configured with the same baud rate and parity and each M2A must have a unique slave ID For an M2A to participate on a network the ENABLED DI...

Страница 44: ...Reading with Sign Decimal Point Bit Field Assignments Bit s Value Field 15 Sign of Reading 0 Positive 1 Negative 14 13 Format of Reading 0 XXX no decimal point 1 XX X 2 X XX 3 XXX 12 0 Numerical value...

Страница 45: ...1 Register 14 Register 14 is the alarm 2 set point The decimal point location is the same as specified in Register 1 8 Fail Status 0 Fail Not Asserted 1 Fail Asserted 7 6 Alarm 2 Status 0 No Alarm 1...

Страница 46: ...rm 1 relay reset 0 Latching 1 Self Resetting Register 26 Register 26 is the alarm 1 ON delay Integer values are in seconds Register 27 Register 27 is the alarm 1 OFF delay Integer values are in second...

Страница 47: ...y 0 and the 1st 0 Register 37 Register 37 is the calibration year Register 38 Register 38 is the calibration outcome Upper Gas Operation Lower Air Operation Calibration Outcome Codes 1 Sensor Missing...

Страница 48: ...unction Code 16 see Appendix C Function Code 16 Registers on page 53 Register 16 Register 16 performs the same function as the ENTER button on the M2A It is useful for remotely silencing alarms With t...

Страница 49: ...5 1025RK Plug in oxygen sensor 65 2514RK Oxygen detector 71 0419 65 2643RK0504SS M2A Transmitter Operator s Manual this document 81 0076RK 01 Zero air calibration cylinder 34 liter steel 81 0076RK 03...

Страница 50: ...Button Quick Reference Chart Mode Entered or Function Performed Button Combination Adjustable or Viewable Parameters Alarm Reset Press and Release ENTER n a Show Information Screen Press and Hold DOW...

Страница 51: ...he PWR SIG terminal strip connections and one or more relays are used route the connections to the M2A in conduit Use shielded cable in the conduit for the PWR SIG connections and unshielded cable or...

Страница 52: ...PLC and DCS Device Wiring S PWR SIG Alarm 1 Alarm Device Fail Alarm Device Alarm Device Power Typical Alarm Wiring Shown A B C RS 485 4 20 mA In S 24 VDC 24 VDC 24 VDC Power Supply 24 VDC Alarm 2 Ala...

Страница 53: ...0 Normally De Energized 1 Normally Energized Register 4 Register 4 is the alarm 1 relay reset 0 Latching 1 Self Resetting Register 5 Register 5 is the alarm 1 ON delay Integer value is in seconds Regi...

Страница 54: ...5 second increments Register 15 Register 15 is the calibration timeout Value is in minutes 5 10 15 20 25 or 30 Register 16 Register 16 is explained in Supported Modbus Functions in the M2A manual Reg...

Страница 55: ...Transmitter Operator s Manual 55 Register 20 Register 20 is the AutoZero Disable 0 AutoZero Enabled 1 AutoZero Disabled Register 21 Register 21 is the Remote Configuration Register 0 No Remote Configu...

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