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65-2670-XX-04 M2A Transmitter Operator’s Manual

WARNING:

When using the M2A, you must follow the instructions and warnings in this manual
to assure proper and safe operation of the M2A and to minimize the risk of personal
injury. Be sure to maintain and periodically calibrate the M2A as described in this
manual.

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Содержание 65-2670-XX-04

Страница 1: ...RKI Instruments Inc www rkiinstruments com 65 2670 XX 04 M2A Transmitter Operator s Manual Part Number 71 0518 Revision D Released 6 24 21...

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: ...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 REPRESENTAT...

Страница 4: ...9 Internal Description 12 Chapter 3 Installation Startup 16 Overview 16 Mounting the M2A Transmitter 16 Wiring the M2A Transmitter 18 Start Up 21 Chapter 4 Operation 24 Overview 24 Normal Operation 24...

Страница 5: ...8 Replacing Components of the Detector 41 Chapter 8 RS 485 Modbus Output 44 Overview 44 Wiring the M2A in a Modbus System 44 Using the M2A in a 4 wire Modbus System 48 Modbus Mode 48 Supported Modbus...

Страница 6: ...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 contr...

Страница 7: ...pm 35 ppm 300 ppm Chlorine 0 3 00 ppm 0 50 ppm 1 00 ppm Chlorine 0 5 00 ppm 0 50 ppm 1 50 ppm Chlorine 0 10 0 ppm 1 0 ppm 3 0 ppm Chlorine Dioxide 0 1 00 ppm 0 10 ppm 0 30 ppm Chlorine Dioxide 0 3 00...

Страница 8: ...G When using the M2A you must follow the instructions and warnings in this manual to assure proper and safe operation of the M2A and to minimize the risk of personal injury Be sure to maintain and per...

Страница 9: ...ituations 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 mo...

Страница 10: ...ver allows you to access the interior of the junction box Detector Junction Box The detector junction box is intended to be installed remotely from the M2A junction box The detector is factory install...

Страница 11: ...the detector cap to access the plug in sensor for maintenance or replacement A cap gasket seals the interface between the housing and cap Plug In Sensor The sensor is secured within the detector asse...

Страница 12: ...he 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 Modbus output may be used to connect th...

Страница 13: ...o the M2A See Wiring the M2A Transmitter on page 18 for all wiring procedures related to M2A Modbus Terminal Strip The Modbus terminal strip is a three position plug in style terminal strip and is the...

Страница 14: ...minal 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 OLED Display The O...

Страница 15: ...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 M...

Страница 16: ...cedures The 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 heav...

Страница 17: ...exible tubing on one end to connect to the calibration adapter splash guard Route the Teflon tubing to an accessible area that is close to the M2A junction box Use the flexible tubing on the other end...

Страница 18: ...technique 8 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 correspond to the...

Страница 19: ...cable shield s drain wire disconnected and insulated at the detector junction box You will connect the opposite end of the cable s drain wire to the M2A junction box s chassis earth ground 14 Reinstal...

Страница 20: ...r three conductor shielded cable or two or three wires in conduit for connections to the power signal terminal strip depending on whether or not the signal S terminal is used The S terminal has a 4 20...

Страница 21: ...tions 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 ve...

Страница 22: ...s 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...

Страница 23: ...he top display line and the current gas reading will be on the bottom display line 4 Press and release the ENTER button The M2A will perform a zero operation and the display will indicate SPAN w Cal G...

Страница 24: ...mation Screen displays the M2A s operating voltage and firmware and hardware information To display the Information Screen do the following 1 Press and hold the DOWN NO button for 3 seconds The Inform...

Страница 25: ...ue to indicate this until Calibration Mode is entered and a calibration is performed In this situation the signal output will be fixed at 3 5 mA from the time Gas Type Mode is entered until the M2A is...

Страница 26: ...es with the ALARM 1 message Table 4 Visual and Audible Alarm Indications Condition Cause Visual Indication s Alarm 11 Increasing gas reading at or above the alarm 1 setpoint A1 LED is on Gas reading a...

Страница 27: ...ng alternates with the ALARM 2 message The alarm 2 relay energizes If the M2A is in both an alarm 1 and alarm 2 condition both the A1 and A2 LEDs will be on the gas reading will alternate with the ALM...

Страница 28: ...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 indicated on the top line of the...

Страница 29: ...A Parameters 1 While in normal operation simultaneously press and hold the UP YES and ENTER buttons for 5 seconds to enter Configuration Mode Release the buttons when the following screen appears 2 If...

Страница 30: ...off delay 0 sec The amount of time the M2A delays turning off the alarm 1 circuit once an alarm 1 condition passes This parameter appears only if the alarm 1 relay reset setting is set to SELF RST It...

Страница 31: ...rom 1 15 minutes and in 15 minute increments from 15 60 minutes ZeroSupp 2 ppm The zero suppression feature helps prevent jumpy readings near the fresh air reading For example if the zero suppression...

Страница 32: ...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 If you want to exit Gas Type...

Страница 33: ...move to the next one Use the UP YES and DOWN NO buttons to adjust a setting See Chapter 5 Configuration Mode on page 29 for a complete description of Configuration Mode 7 When you have reviewed and a...

Страница 34: ...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 page 38 f...

Страница 35: ...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 36: ...perly shielded See Wiring the M2A Transmitter on page 18 2 Verify that the detector wiring is correct and secure 3 Increase the filter setting in Configuration Mode 4 Increase the zero suppression set...

Страница 37: ...for this operation 4 Use the flexible tubing coming from the calibration adapter splash guard to connect the regulator to the calibration adapter splash guard 5 Turn the regulator s on off knob count...

Страница 38: ...ing normally until the M2A is in normal operation again NOTE The detector must be calibrated with a gas concentration between 10 and 100 of the channel s full scale value ie a 0 500 ppm NH3 detector m...

Страница 39: ...re is completed Materials 0 25 LPM fixed flow regulator CAUTION Using the 0 5 LPM regulator that is normally recommended for M2As will result in an inaccurate calibration zero air cylinder if you susp...

Страница 40: ...will continue to display the minimum gas response on the display and retain the response level in its memory 10 Press and release the ENTER button The M2A will perform a fresh air adjustment and the...

Страница 41: ...ed at 3 5 mA and the relays will remain in their non alarm state to avoid unwanted alarms while the calibration gas clears from the detector At the end of the 1 minute period the REMOVE CAL GAS messag...

Страница 42: ...efore you continue with the next step For ClO2 Allow the replacement sensor to warm up for 2 3 hours before you continue with the next step 12 Calibrate the transmitter as described in the Calibration...

Страница 43: ...tor junction box then screw the mounting threads of the detector into the conduit hub If necessary for environmental conditions apply thread sealant or Teflon tape to the hub and or detector threads t...

Страница 44: ...addresses 1 247 The M2A s line driver provides for up to 128 M2As to be connected together without the need for a repeater Figure 13 Figure 14 below illustrate typical M2A wiring configurations If mor...

Страница 45: ...on 5 wires are used for wiring the M2A into a Modbus system Figure 11 also illustrates typical alarm device wiring The ground jumper must be removed in this wiring configuration Adding an M2A to an Ex...

Страница 46: ...the Modbus controller is omitted Instead the Common terminal on the Modbus controller is connected to the of the 24 VDC power supply The ground jumper must be installed in this wiring configuration Ad...

Страница 47: ...emoved see Figure 13 Figure 14 below Figure 13 Multiple M2As in a Daisy Chain Configuration ID 125 Modbus Master Up to 128 M2As can be connected without a repeater RS 485 RS 485 M2A Termination Jumper...

Страница 48: ...tically 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 49: ...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 DIS...

Страница 50: ...eading 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 51: ...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 U...

Страница 52: ...ized Register 25 Register 25 is the alarm 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...

Страница 53: ...er 36 is calibration month upper byte and day lower byte This is zero based e g January 0 and the 1st 0 Register 37 Register 37 is the calibration year Register 38 Register 38 is the calibration outco...

Страница 54: ...alarm condition For a complete description of Function Code 16 see Appendix C Function Code 16 Registers on page 60 Register 16 Register 16 performs the same function as the ENTER button on the M2A It...

Страница 55: ...CLO2 65 2302 CLO2 3 and 65 2303 CLO2 5 detectors 65 2053 01 CT 7 Series plug in sensor 0 500 ppm NH3 with membrane for 65 2302 NH3 500 detector 65 2054 01 CT 7 Series plug in sensor 0 75 0 ppm 0 100...

Страница 56: ...m 81 0192RK 02 Calibration cylinder 2 ppm Cl2 in nitrogen 58 liter 81 0192RK 04 Calibration cylinder 2 ppm Cl2 in nitrogen 34 liter aluminum 81 1050RK 25 Regulator fixed flow 0 25 LPM with gauge and k...

Страница 57: ...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 DOWN...

Страница 58: ...PWR SIG terminal strip connections and one or more relays are used route the connec tions to the M2A in conduit Use shielded cable in the conduit for the PWR SIG connections and unshielded cable or i...

Страница 59: ...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 Alar...

Страница 60: ...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 Regis...

Страница 61: ...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 Regi...

Страница 62: ...ransmitter Operator s Manual 62 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 Configur...

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