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3.1.

Checking the installation

It is checked that, at least, all connections have been made and that the complete installation
complies with current standards in force.

CAUTION
OLDHAM is not responsible for the compliance of the complete electrical safety system.

The MX52 unit is switched on by means of circuit breakers * provided for that purpose and which
ensure protection of the mains power unit.

* The circuit breakers are to be selected according to the power consumption levels specified by the
manufacturer and the length of the electric cables.

3.2.

Switching on the unit

CAUTION
The handling operations and adjustments described in these paragraphs are strictly
reserved for authorized personnel as they are liable to affect detection safety.

To start up the MX52 unit, you must:

-

swivel the front panel,

-

press the ON/OFF button located to the bottom left-hand side of the FRONT
circuit: see Figures 4 and 26 (item A).

-

The display panel then shows, for example:

MX 52 V2.0

The unit then goes into INITIALIZATION mode for one minute. Consequently, all the alarms are
inhibited and the current outputs are 1 mA for the channels in service. The unit then performs a self-
test * on its buzzer and all its night-emitting diodes. At the end of this one-minute period, the
channels in service return to normal operation and the corresponding alarms and relays are enabled.

* The user can carry out a “manual-self test” by pressing the test key at any time (see Fig. 26).
This self-test lasts 20 seconds and the display panel may show the following displays one after the
other, for example:

«
...
17
18
19
20
21
...
»

Содержание MX 52

Страница 1: ...COMMISSIONING OPERATING AND MAINTENANCE MANUAL MX 52 MEASURING UNIT Part Number NP52UGB Revision B 0 The Fixed Gas Detection Experts ...

Страница 2: ... this document in any form whatsoever without the written permission of Oldham S A S is forbidden The information contained in this manual is accurate to our knowledge As a result of continuous research and development the specifications of this product may be modified at any time without prior notice ...

Страница 3: ...PECIFIC USE C C L L A A U U S S E E S S C C O O N N C C E E R R N N I I N N G G P P R R O O P P E E R R T T Y Y Drawings plans specifications and information included in this document contain confidential information that is the property of OLDHAM None of this information may be reproduced copied divulged or translated by physical electronic or any other means nor used as the basis for the manufac...

Страница 4: ...4 ...

Страница 5: ...r shielded cable 11 2 3 5 FLAME detectors 2 3 or 4 connecting wires for shielded cable depending on utilization 11 2 3 6 CO2 detector of type Ventostat VT 13 2 3 7 Specific case of intrinsic safety detectors 13 2 3 8 Other detectors with standardized current output 14 2 3 9 Parking application 14 4 Connecting the unit to external devices 15 2 4 1 Slaving controls 15 2 4 2 4 20 mA current outputs F...

Страница 6: ...TO SERVICE 45 5 1 Programming the unit 45 5 2 Programming the measuring channels 45 5 2 1 Programming 45 5 2 2 Copy 46 5 3 Calibrations 46 5 4 4 20 mA output adjustment for a measurement channel 50 6 MAINTENANCE 51 6 1 Periodic preventive maintenance 51 6 1 1 On the MX52 unit 51 6 1 2 On the detectors 51 6 2 Failures causes and remedies 52 6 3 Scrapping of MX52 55 6 4 List of spare and replacement...

Страница 7: ...d The number of line PCBs is always equal to the mixed even number greater than the number of channels used divided by two M MA AI IN N C CH HA AR RA AC CT TE ER RI IS ST TI IC CS S Rack 3U 19 AC or DC power supply 16 measuring inputs for detectors Display of measurement on a plasma display panel 2 lines 16 characters One keypad with four keys for the user One CALIBRATION key and one PROGRAMMING k...

Страница 8: ... open or closed at rest Current output 4 20 mA per measuring channel Common audio alarm that can be acknowledged in the case of occurrence of gas alarms 1 2 Rack The MX52 rack is of the 3U 19 type Overall dimensions Fig 1 Overall view front profile Fig 2 Overall view back profile Fig 3 1 3 The various printed circuit boards Overall view Fig 4 Power board and module Fig 5 MICRO board Fig 6 Measurin...

Страница 9: ...using the main On Off switch below and to the left of the FRONT circuit see Figures 4 and 26 2 Electrical connections of the MX52 Unit Fig 8 The MX52 unit is equipped with a pulse automatic device which enables to connect 24 V DC voltage in a lack of 220 V AC voltage so we can use no expansive save power supply 2 2 1 Alternative power supply Voltage 230 V AC 207 to 244 V 50 60 Hz Maximum power 300...

Страница 10: ... by SHIELDED cables The utilization of shielded cables is MANDATORY The earth braid of shielded cables must be connected to the earth at one end only CAUTION Each channel is configured in the factory for a given type of detector explosive gas toxic gas fire or flame If two different types of detector are interchanged this may result in the destruction of the central unit or of the detector 2 3 1 E...

Страница 11: ...al designations are as follows Thermovelo detectors of type EC 11 sensitive to temperature variations Ionic detectors of type EI 1 100 sensitive to smoke Optical detectors of type EO 1 100 sensitive to smoke Resistance of detector unit cable 28 ohms maximum per wire i e 56 ohms in loop 2 km for cable 2 x 1 5 mm Fire detectors can be detected in parallel to a maximum of five The end of loop resisto...

Страница 12: ...ous types of terminal block see table below Model 20 20 U 20 20 UC 20 20 UB 20 20 LC 20 20 UNC 20 20 LBC 20 20 I Type of terminal block B C A C C C A Resistance of cable unit In the case of local 24 V DC power supply 8 5 ohms maximum per wire i e 17 ohms in loop In the case of power supply via the MX52 unit 3 ohms maximum per wire i e 6 ohms in loop 4 ohms for detector 20 20 I IR3 Connection on MX...

Страница 13: ...sic safety detectors Two types of intrinsic safety barrier can be used Z787 EX and MTL787S PRECAUTIONS Before connecting the barrier to the unit check that the voltage is 25 V DC A short circuit in the electrical connections will result in destruction of the barrier Perform wiring in the DE ENERGIZED state The electrical link between the MX52 unit and the clipper is made using a screened cable wit...

Страница 14: ...wires or 3 wires that can be supplied with power between 19 V DC and 32 V DC and that supplies a standardized current signal of between 4 and 20 mA can be connected to the MX52 unit The connection requirements are identical to those for the corresponding OLDHAM detectors see Fig 22 2 3 9 Parking application CTX300 Co parking toxic gas detectors can be fitted in parallel when a mean gas concentrati...

Страница 15: ...iggered a solenoid valve connected to relay AL2 will be actuated as soon as alarm 2 is triggered For all channels A common relay associated with the triggering of alarm 3 for the 16 channels By programming this common relay can also be used for the remote transmission of the audio warning signal This relay will then be associated with all the unit s alarms The 3 contacts are available back to powe...

Страница 16: ...MEASUREMENT I 4 mA Full scale I 20 mA Out of range or in doubt I 23 2 mA An example of the connection of a multi channel recorder is given in Fig 25 2 4 3 RS 232 and RS 485 outputs RS232 OUTPUT A computer can be connected on a female sub D DB9 type connector located on the back of the micro board fig6 repA The MX52 programming from outside will be possible thanks to this connection RS 232 OUTPUT U...

Страница 17: ...electrical resistance for plu 5V a with RS 485 shielded no programmed polarization resistor for moins GND b without RS485 shielded programmed polarization resistor for moins GND End loop resistor It is located on the MX52 micro board and must be programmed with the last MX52 unit of the loop by pins with a 120 Ohms value The MX stored data are some instantaneous values The RS485 output is a half d...

Страница 18: ...puter must be used in order to printout the data stored by the MX52 unit Several MX52 units can be connected to a single computer which is the MASTER In this case a SLAVE number is assigned to each MX52 unit 2 4 4 Remote acknowledgement It is possible to allow remote acknowledgement by connecting on connector 5 plugs on the back or the micro board see fig 6 item B ...

Страница 19: ...ctly reserved for authorized personnel as they are liable to affect detection safety To start up the MX52 unit you must swivel the front panel press the ON OFF button located to the bottom left hand side of the FRONT circuit see Figures 4 and 26 item A The display panel then shows for example MX 52 V2 0 The unit then goes into INITIALIZATION mode for one minute Consequently all the alarms are inhi...

Страница 20: ...ONT panel LED Extinguished Illuminated in steady mode Flashing GREEN Channel not in service Channel in service Threshold AL1 exceeded manual clearing and not acknowledged 1st red AL1 not triggered Threshold AL1 exceeded automatic clearing Threshold AL2 exceeded manual clearing and not acknowledged 2nd red AL2 not triggered Threshold AL2 exceeded automatic clearing 3rd red AL3 not triggered Thresho...

Страница 21: ...ring block diagram 2 in parking cycle block diagram 3 The alarm thresholds are to be selected according to the gases detected and the corresponding standards in force Special case A channel connected to a fire detector It is MANDATORY to select the scale with 100 divisions It is MANDATORY to select the alarm threshold with 60 divisions Owing to the end of loop resistor of 2 7 k the fire detector o...

Страница 22: ...tinguished Relay disengaged Buzzer stopped No Illumination of flashing alarm LED After T2 time START Threshold exceeded Time T1 exceeded Illumination of flashing alarm LED LED steady mode Buzzer stopped END Relay engaged Buzzer engaged No No No Yes Yes Yes Yes Alarm acknowledged ...

Страница 23: ...AM 2 NORMAL CYCLE WITH AUTOMATIC CLEARING START Threshold exceeded Time T1 exceeded LED extinguished Relay disengaged Alarm LED illuminated in steady mode After T2 time Relay engaged Buzzer engaged END Yes No No Yes ...

Страница 24: ...mum operating time for each relay t AL1 tR1 R2 t AL2 Threshold AL2 Threshold AL1 Starting of relay R1 Stopping of relay R1 Starting of relay R2 Stopping of relay R2 min tAL1 Min operating time for alarm 1 defined for each channel t1 tAL2 Min operating time for alarm 2 defined for each channel t2 tR1 R2 Switching time from relay 1 to relay 2 defined for the whole unit tR1 R2 ...

Страница 25: ...diate results Display SUP The relays are actuated if the thresholds are reached The general fault relay is actuated The 4 20 mA output of the channel is greater than 20 mA ALl these states are memorized and the only way of acknowledging them is to switch off the channel and then restart it Faults are valid after a preprogrammed time in the same way as alarms FAULT BLOCK DIAGRAM END START Wait unti...

Страница 26: ...or 10 seconds The user can interrogate a channel manually by selecting that channel with the and keys to obtain a manual display for one minute The user can return to normal cyclic scanning during that one minute period by simultaneously pressing the and keys The display panel then shows alternating displays three times in succession For example then Channel 1 x x LEL CH4 Channel 2 x x x ppm CO Ch...

Страница 27: ...e FRONT panel for maintenance Item D Fig 26 NORMAL MODE Manual display of previous channel Combined with the PLUS key to restart the channels automatic display cycle MAINTENANCE MODE Manual display of previous channel Decrease value threshold etc Display of previous choice on off etc NO NORMAL MODE Manual display of next channel Combined with the MINUS key to restart the channels automatic display...

Страница 28: ...through a menu CALIBRATION key item C Fig 26 accessible after opening and swivelling the front panel To set a channel to CALIBRATION mode To quit that mode 4 1 3 Potentiometers On the FRONT circuit each measuring channel has four potentiometers item E in Figures 26 and 27 These are accessible by opening and swivelling the FRONT panel of the MX52 unit and are laid out as follows see Fig 27 TOP item...

Страница 29: ...alarms LED and relays at the same time CHANNEL COPY programming To copy the complete programming from one channel to another time saving UNIT programming To program the whole configuration of the MX52 unit language slave number etc UPLOADING programming To transfer data measurements and events etc from the unit to a computer via the MX52 unit s RS 485 J BUS output 4 2 2 Block diagram of the scroll...

Страница 30: ...LLING OF THE VARIOUS MENUS NORMAL DISPLAY P Programming Channel x x Programming Simulation Programming Channel xx copy Programming Unit Programming Uploading REMINDER Fig 26 P Programming key Keys used to move ...

Страница 31: ...f On then ENTER CHOICE OF RANGES 10 30 100 300 1000 2000 xxxxU then E N T E R SELECTION OF POINT POSITIONING 100 10 0 1 00 0 100 0 010 0 001 then E N T E R 0 to 2000 then ENTER 0 to 2000 then ENTER Seuil Alarme 1 25 Measuring range 100 Programming Channel xx Alarm 1 threshold 25 NORMAL DISPLAY Channel xx Off Alarm 2 threshold 50 Decimal point 1 P P P P P P ...

Страница 32: ...ncreasing Decreasing then ENTER Increasing Decreasing then ENTER Increasing Decreasing then ENTER Normal Parking then ENTER Cycle Normal P Alarm 2 Increasing Alarm 3 threshold 75 Alarm 1 Increasing Alarm 3 Increasing P P P P P ...

Страница 33: ...3 Manual Automatic then ENTER Manual Automatic then ENTER Time delay Mean then ENTER Negative Positive then ENTER Alarm 3 Time delay Ack alarm 1 Manual Ack alarm 2 Manual Relay 1 safety Negative P P P P ...

Страница 34: ...ree Set to 0 Set to 1 then E N T E R Free Set to 0 Set to 1 then E N T E R Free Set to 0 Set to 1 then E N T E R Free Set to 0 Set to 1 then E N T E R Relai 2 Free Relay 2 safety Negative Relay 1 Free Relay 3 Free Fault relay Free P P P P ...

Страница 35: ...a then E N T E R CH4 CO 2S etc then E N T E R LEL ppm etc then E N T E R Time Time interval between the triggering of the AL LED and of the corresponding relay or the minimum operating time of the relay in parking mode then E N T E R Display of time by using keys then E N T E R Texte then E N T E R Gas CH4 Cal detection No Channel xx Premises 1 channel U Units LEL Alarm 2 time 00 00 00 Alarm 1 tim...

Страница 36: ...easing the down key Parameters specified in square brackets are the VALID parameters in memory 1 Free This means that the relay can be activated when programming alarm thresholds are triggered Set to 0 This means that the relay is not powered supply and will not be activated by MX52 control unit with alarm Set to 1 This means that the relay is always powered supply by the MX52 control unit and nei...

Страница 37: ...on ppb parts per billion UEG Unter Explosion Grenze LEL in German LEL Limite inférieure d explosivité LEL in French bar unit of pressure mb unit of pressure millibar Rh relative humidity m s metres per second mg unit of weight milligram unit flashing U free indication of unit then E N T E R ...

Страница 38: ...Phosphine HF Hydrofluoric acid CFC Freons CO2 Carbon dioxide ASH Arsine SiH4 Silane BUT Butane PRO Propane GNT Natural gas ETY Ethylene PNT Pentane HEX Hexane PRY Propylene ACY Acetylene ETA Ethanol ACO Acetone OPR Propylene oxide OET Ethylene oxide ISB Isobutane DIM Dichloromethane AET Ethyl alcohol BUN 2 Butanol ISP Isopropanol XYL Xylene TOL Toluene ESS Petrol gasoline BUD Butadiene HYD Hydroge...

Страница 39: ...o indicate that this channel is in simulation mode To artificially vary measurement on the display panel and trigger alarms LED and relays ESCAPE ECHAPPE To exit from this menu and return to normal operation Programming Simulation xx NORMAL DISPLAY P P Channel xx LEL CH4 S Programming Simulation xx ACK ENTER END OF MENU ...

Страница 40: ...to be copied Copy the channel s configuration to another channel xx indication of Other channel number using keys Validation of copy Programming Copy channel xx NORMAL DISPLAY P P Copy channel Channel xx xx Programming Copy channel xx Copy channel Channel xx xx ENTER ENTER END OF MENU ...

Страница 41: ...rman Spanish then E N T E R Choice of transmission speed with computer 120024004800960019200Bauds then E N T E R Choice of slave address this unit 0 to 250 then E N T E R NORMAL DISPLAY P P Programming Unit P P P Language French Programming Unit Speed 9600 Slave address 1 ENTER ...

Страница 42: ...any triggering of buzzer NO YES then E N T E R Utilization of common audio alarm buzzer Function in series with buzzer jumper NO YES then E N T E R YES If copy of buzzer on alarm 3 and with buzzer option into service audible alarm will be triggered when there is an alarm NO The common audible alarm buzzer will be triggered for a 30 seconds maximum time even there is an alarm then E N T E R Respons...

Страница 43: ...OLDHAM personnel and personnel approved by OLDHAM can be made this operation Display of menu Validation of utilization of menu Display of menu confirmation Data transfer request Validation of data transfers Confirmation of uploading ...

Страница 44: ...44 ...

Страница 45: ...cations the Unit programming menu must be used see Section IV 2 on Menus by means of the keypad and the Programming key Then the instructions in the menu should simply be followed CAUTION If the unit remains in programming mode for more than 30 minutes it automatically switches to fault mode 5 2 Programming the measuring channels 5 2 1 Programming To program each measuring channel according to the...

Страница 46: ...y be necessary more or less frequently based for example on application field conditions exposure to gas sensor technology and environmental conditions The frequency of calibration is best determined by company policy or local regulatory agencies If an instrument fails to operate properly during any functional bump test a full instrument calibration should be performed successfully prior to use Th...

Страница 47: ... clockwise direction using a screwdriver Adjust the DETECTOR ZERO NOTE If the ambient air is not pure inject air using a synthetic air cylinder and the gas injection pipe or a remote calibrating fixed device with a flow rate of 60 litres per hour for 25 seconds directly on the detector or a flow rate of 170 litres per hour for 1 min 45 s using a remote calibrating fixed device As soon as the signa...

Страница 48: ...ow LED is extinguished and the C on the display panel disappears The measuring channel now operates normally an calibration has been completed Case 2 Measuring channel connected to a detector with no integrated electronics and supplying a standardized 4 20 mA current CTX50 CTX100 CTX200 CTX870 etc Prepare the detector for calibration See the remarks for zero adjustment in pure air and natural diff...

Страница 49: ...d for that purpose see the manual for the detector concerned Prepare the measuring channel for calibration same operations as in case 1 Adjust the detector zero NOTE If the ambient air is not pure inject air using a synthetic air cylinder and the gas injection pipe or a remote calibrating fixed device with a flow rate of 60 litres per hour for 25 seconds directly on the detector or a flow rate of ...

Страница 50: ...sensitivity potentiometer Item A Fig 27 Stop the injection of the standard gas wait for the measurement to return to zero on the MX52 display panel Then press the CALIBRATION key item C Fig 27 The flashing yellow LED is extinguished and the C on the display panel disappears The measuring channel now operates normally and calibration has been completed 5 4 4 20 mA output adjustment for a measuremen...

Страница 51: ... display panel the triggering of alarms LED and relays the slaving controls and the 4 20 mA current output Cause a fault to occur such as a line fault by disconnecting a detector wire to check the correct operation of the fault stages 6 1 2 On the detectors The detectors must be calibrated at least twice a year Case 1 Detectors without integrated electronics CAPTEX CEX800 CEX810 etc With this type...

Страница 52: ...blown Replace the 24 V DC fuses located at the back of the MX52 unit item B Fig 5 24 V DC internal protection fuse blown Replace the 24 V DC fuse located on the power board item C Fig 5 CAUTION When replacing a fuse it is mandatory to comply with the required type and rating Fault indicator light on in steady mode Faulty electrical connections on the telemetry line wires and detector Check the con...

Страница 53: ...ied by using the Unit programming menu buzzer connected An alarm is triggered the LED lights up and the relay is actuated but there is no audio alarm The buzzer strap is not correctly positioned Fall the buzzer switch Fig 26 The buzzer is not programmed as in service If the audio alarm is wanted the programming must be modified by using the unit programming menu buzzer connected The audio alarm st...

Страница 54: ...e modified by using the Channel programming menu self calibration and choose CAL detection YES Impossible to upload data from the MX52 to a computer Faulty electric connections Check the connections on the MX52 unit connector item A Fig 6 and the computer Check that the cable is satisfactory The cable does not match the 2 wire RS485 type of link Replace the cable with a suitable one Remote acknowl...

Страница 55: ...pare and replacement parts DESIGNATION REFERENCE Complete power unit 6311078 Power board 6451422 Toroidal transformer 6111194 Mains power supply fuse 2 A time delayed 6154697 DC power supply fuse 12 5 A time delayed 6154721 Power board relay DC 6155745 Common alarm relay 6155752 AC mains relay 110 V AC 6155761 MICRO board 6451423 Lithium battery on micro board 6111174 Measuring channels board 6451...

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Страница 87: ... 95 humidity no condensation ILLUMINATED INDICATIONS Fluorescent display panel 2 lines of 16 characters 80 light emitting diodes power on gas alarms faults POWER SUPPLIES 103 to 122 V AC in option 207 to 244 V AC 21 to 31 V DC Power consumptions 300 VA or 240 W MEASURING INPUTS Active 2 wire or 3 wire shielded cables according to type of detectors Resistance in loop mode 3 wire EXPLO 32 1 000 m wi...

Страница 88: ... for alarm 3 or audio alarm transfer 1 common fault relay SIGNAL OUTPUTS 4 20 mA analog per channel maximum load resistance 600 Serial RS 485 J BUS common MISCELLANEOUS OUTPUTS Alarm remote acknowledgement STANDARDS Conformance with European standards CEM low voltage and ATEX CE mark ...

Страница 89: ... will comply with all applicable standards and particularly with EN 60079 14 EN 60079 17 and EN 50281 1 2 The MX52 device must not be subject to intense mechanical vibration and must be installed in a safe area away from potentially explosive atmospheres It is essential to refer to the user and installation manuals for the gas detectors referred to above particularly the paragraph entitled Special...

Страница 90: ...he device in terms of value measured and fault processing as a function of the input current value supplied by the detector Where the user connects a brand of detector other than OLDHAM to the MX52 device he must check carefully that the transfer curve is fully compatible with the device input characteristics to ensure that the data generated by the detector is correctly interpreted Equally the de...

Страница 91: ...reted Equally the device must supply a suitable power supply voltage allowing for cable voltage losses 9 3 3 Power supply and load resistance characteristics Maximum current available between terminals 2 and 3 350 mA at 21 V Maximum no load voltage between terminals 2 and 3 30 V Load resistance outside the IS barrier between terminals 1 and 2 47 ohms N B This data applies only where detectors othe...

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Страница 96: ...ng the details below UK Office Keison Products P O Box 2124 Chelmsford Essex CM1 3UP England Tel 44 0 330 088 0560 Fax 44 0 1245 808399 Email sales keison co uk Please note Product designs and specifications are subject to change without notice The user is responsible for determining the suitability of this product ...

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