Dräger REGARD-1 Installation, Operation And Maintenance Manual Download

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REGARD-1

Single-channel controller

Installation, operation and maintenance

Issue 6 – December 2006

Summary of Contents for REGARD-1

Page 1: ...REGARD 1 Single channel controller Installation operation and maintenance Issue 6 December 2006 ...

Page 2: ...ON 13 Installation environment 13 Mounting points 13 AC supply 14 Connecting transmitters and measuring heads 15 Relay outputs 18 A1 and A2 24V digital outputs 18 Remote reset input 20 CONFIGURATION AND CALIBRATION 21 Set measuring range 21 Calibrating a 4 20 unit 23 Calibrating an SE Ex unit 25 Configuring alarms 28 MAINTENANCE 35 Fault finding 35 SPECIFICATIONS 36 Part numbers 37 EC type examina...

Page 3: ...smitter or measuring head Not for use in areas where explosion hazards are possible This equipment is not approved or certified for installation in potentially explosive atmospheres Liability for proper function or damage Liability for proper function of the equipment is irrevocably transferred to the owner or operator to the extent that the equipment is serviced or repaired by personnel not emplo...

Page 4: ...For stationary continuous monitoring of flammable gases and vapours x Display of measured gas value x Indication of alarms and control of countermeasures x Indication of time weighted average value time weighted average alarm output and data logger requires optional RS 232 TWA alarm board The SE Ex unit will not work with the Dräger SE Ex LC measuring head Both units are suitable for use in reside...

Page 5: ...hlstrasse 9 44809 Bochum Germany The Bericht über die Eignungsuntersuchung has been issued under PFG No 41301303 In Germany only Read and consider chapter 5 of the Bericht über die Eignungsuntersuchung which follows Text included in German edition manual only Special conditions for safe use according to EC type examination certificate BVS 03 ATEX G 011 X Vibration can cause malfunction of alarm an...

Page 6: ...ns board is available that provides an isolated 4 20mA output TWA alarm relay and data logger with RS 232 Two 1 2AH lead acid batteries can be fitted inside the unit s enclosure to provide continued operation for several hours if AC power is interrupted Lead acid batteries Display board Pellistor board Options board Main board Cable entry area ...

Page 7: ...06 7 Main board 1 Terminals for batteries or external DC input 2 Connector for display board 3 Potentiometers for A1 A3 alarms and display adjustment 4 Terminals for field devices 5 Connector for Options board 1 2 3 4 5 5 ...

Page 8: ... 20mA transmitter or SE Ex sensor input 10 11 12 13 A1 24V switched output 100mA max A2 24V switched output 100mA max 14 15 16 17 18 19 A1 relay output A2 relay output 20 21 22 23 24 25 TWA relay output requires Options board A3 relay output 26 27 28 29 30 31 Fault relay output Inhibit relay output N E L 98 253 VAC fused output 500mA max back row terminals 98 253 VAC input front row terminals ...

Page 9: ... unsealed batteries are fitted that could generate hydrogen when charged drill a vent hole in the top of the enclosure The 24V battery terminals can also be used for an external 24VDC input Do not connect AC and external DC supplies at the same time Maintenance inhibit jumper When the inhibit jumper is fitted all relays will go to their normal non alarm state Fuses Maintenance inhibit jumper ...

Page 10: ... of the display board x V1 displays gas level under range and over range and calculates a TWA gas level over eight hours this board contains firmware release 1 00 or 1 01 x V2 displays gas level under range and over range and calculates the TWA gas level over an user adjustable period and logs the gas level to memory this board contains firmware release 2 00 or 2 01 The firmware version is shown o...

Page 11: ...t the pellistor board onto SK2 The pellistor board has a 4 pole switch and three potentiometers x SW1 Sets sensor current range and amplifier range x VR1 Sets zero point x VR2 Sets sensor current x VR3 Sets gain span Options board The option board provides x TWA alarm relay requires display board V2 to operate x 4 20mA output proportional to gas level x datalogger output Fit the options board onto...

Page 12: ... as ASCII characters Data rate 2400 Baud Data bits 8 Stop bits 1 Parity none Protocol Xon Xoff The gas level is and TWA are printed every 1s For example Gas 20 1 TWA 0 1 To reset the TWA value to zero hold the unit s Reset pushbutton pressed for 10s or hold the remote reset input closed for 10s until the display shows tA 0 RJ11 socket RS 232 Sub D 9 Pole Pin Function Pins Function 1 Rx 3 Tx 2 0 V ...

Page 13: ...not explosion proof and must not be installed in a hazardous area without additional Ex protection x Avoid locations where excessive vibration is possible x Avoid locations where aggressive or corrosive gases contaminants or pollutants harmful to electronic equipment are present Mounting points Mounting points of the enclosure base are shown here Mounting point Mounting hole Mounting hole Mounting...

Page 14: ... 114 Use a hole cutter to make the cable entries Do not attempt to knock out the cable entries AC supply Connect a permanent AC supply to the unit If the AC supply to the unit is from an AC socket the maximum allowed length of cable between the socket and the unit is 3m ...

Page 15: ...een 7 8 9 4 20mA signal 24V 4 20mA transmitter Regard 1 main board Three wire 4 20mA transmitter Only for a transmitter with 4 20mA source output Regard 1 will not work with a three wire transmitter that has a 4 20mA sink output Use cable with braided copper screen 7 8 9 0V 4 20mA signal 24V 4 20mA transmitter Regard 1 main board ...

Page 16: ...gard 1 to the transmitter Itxr is the transmitter operating current in mA This formula assumes that the three cores of the connecting cable each have the same resistance Example Polytron IR operating current at 24V is approx 200mA So limit of cable resistance is core per ohms 4 200 800 Two wire 4 20mA transmitter with safety barrier The following diagram shows the general arrangement Refer to spec...

Page 17: ...ead when the controller is powered this will damage the sensor Maximum cable resistance The maximum allowed cable resistance is 6 ohms per core with the Dräger SE Ex sensor This limits the cable length according to the cross sectional area of the cable Cable x section Maximum length 1 0 mm2 250 m 1 5 mm2 400 m 2 5 mm2 700 m 4 0 mm2 1000 m ...

Page 18: ...elay Inhibit relay The fault relay is energised in its normal state ie when there is no fault Unscreened cable can be used for relay outputs A1 and A2 24V digital outputs The digital outputs can be used to drive alarm devices directly Use cable with braided copper screen Example flashing beacon activated by A1 alarm and klaxon activated by A2 alarm ...

Page 19: ...Issue 6 December 2006 19 Output voltage and current The voltage at each output decreases as the current drawn from the output increases Output voltage Current available 22 V 30 mA 18 V 100 mA ...

Page 20: ...e reset input To acknowledge and reset alarms remotely from the controller connect a normally open switch to the remote reset terminals Close the contacts momentarily to acknowledge reset alarm s Use cable with braided copper screen ...

Page 21: ...g range DPs A B C D E 0 1 2 OFF OFF OFF OFF OFF 0 3 2 ON OFF OFF OFF OFF 0 5 2 OFF ON OFF OFF OFF 0 10 2 ON ON OFF OFF OFF 0 25 1 OFF OFF ON OFF OFF 0 30 1 ON OFF ON OFF OFF 0 50 1 OFF ON ON OFF OFF 0 100 1 ON ON ON OFF OFF 0 200 0 OFF OFF OFF ON OFF 0 250 0 ON OFF OFF ON OFF 0 300 0 OFF ON OFF ON OFF 0 500 0 ON ON OFF ON OFF 0 1000 0 OFF OFF ON ON OFF 0 2000 0 ON OFF ON ON OFF 0 2500 0 OFF ON ON ...

Page 22: ...F ON ON OFF OFF 0 30 1 ON ON ON OFF OFF 0 50 1 OFF OFF OFF ON OFF 0 100 1 ON OFF OFF ON OFF 0 200 0 OFF ON OFF ON OFF 0 250 0 ON ON OFF ON OFF 0 300 0 OFF OFF ON ON OFF 0 500 0 ON OFF ON ON OFF 0 1000 0 OFF ON ON ON OFF 0 2000 0 ON ON ON ON OFF 0 2500 0 OFF OFF OFF OFF ON 0 3000 0 ON OFF OFF OFF ON 0 5000 0 OFF ON OFF OFF ON 0 9999 0 ON ON OFF OFF ON DPs decimal places For all firmware versions SW...

Page 23: ...controlling the output of the transmitter directly eg by means of the transmitter s front panel controls to simulate a gas signal x Connect a voltmeter across TP1 and TP2 on the main board If applying calibration gas to the transmitter x Apply calibration gas to the transmitter Use a gas concentration that is between 40 and 90 of measuring range x Adjust potentiometer FS on the main board until th...

Page 24: ...A x Adjust potentiometer FS on the main board until the voltage across TP1 and TP2 corresponds to the transmitter output If the controller has a display confirm that the reading is correct Transmitter output mA Voltage across TP1 TP2 V Display reading 0 100 range 12 2 4 50 13 2 6 56 14 2 8 63 15 3 0 69 16 3 2 75 17 3 4 81 18 3 6 88 19 3 8 94 20 4 0 100 Scale for different measuring range FS span a...

Page 25: ...ion of switches B C and D does not matter yet 2 Adjust the sensor current to the required value x Turn off the unit by disconnecting the AC or DC supply and batteries if fitted x Connect an ammeter between terminal 9 and the sensor x Re connect the AC or DC supply x Adjust VR2 on the pellistor board to set the current 270 0 mA for Dräger Ex sensors Allow two minutes for the current to settle after...

Page 26: ...rn VR1 anti clockwise x If the controller has a display verify that it reads zero Calibrate span 1 Set sensitivity range Set the amplifier gain range using switches SW1 B C and D Range SW1 No Sensitivity A B C D 1 10 60 mV x ON OFF OFF 2 60 110 mV x OFF ON OFF 3 110 160 mV x OFF OFF ON 4 160 220 mV x OFF OFF OFF x Do not change the position of switch SW1 A For new Dräger Ex sensors range 3 110 160...

Page 27: ...ate x Allow display reading to settle about 2 to 3 minutes x Adjust VR3 on the pellistor board until the voltage across TP1 and TP2 corresponds to the concentration of the calibration gas Gas concentration as of measuring range Voltage across TP1 TP2 V 40 2 08 45 2 24 50 2 40 55 2 56 60 2 72 x If the unit has a display verify that the display reading corresponds to the gas concentration ...

Page 28: ...e alarm relays latching Regard 1 SEEx set at least one alarm relay the one with the highest alarm level to be latching The A2 alarm can also be set to be acknowledgeable You can use the A2 relay to control an audible alarm that you want to be able to silence even when the gas alarm is still tripped Use switch SW1 on the main board set the operation of the alarms relays A1 alarm SW1 Mode of operati...

Page 29: ...N OFF Not acknowledgeable Acknowledgeable ON OFF A3 alarm SW1 Mode of operation E F Rising Falling ON OFF Non latching Latching ON OFF Fault alarm SW1 Mode of operation G Non latching Latching ON OFF x The A1 A2 and A3 relays energise on alarm x The Fault relay de energises on alarm ie is normally energised ...

Page 30: ...bration and adjustment of alarm set points use DVM between test points TP1 and TP2 only To set the alarm levels you must simulate a gas signal You can do this x using a potentiometer that can be varied from 1200 to 6000 ohms x by directly controlling the output of the transmitter x using a 4 20mA loop calibrator Using a potentiometer x Connect the potentiometer between terminals 8 and 9 Test poten...

Page 31: ...1 alarm trips For the A2 and A3 alarms repeat the above procedure with the A2 and A3 potentiometers x If an alarm is not required turn its potentiometer fully clockwise x The fault alarm threshold is fixed at 3 2mA Use this table to determine the alarm threshold Read off the voltage across TP1 and TP2 corresponding to the required alarm threshold Alarm threshold of 0 100 range Voltage across TP1 T...

Page 32: ... enrichment alarms use this table to determine alarm thresholds for a 0 25 range Alarm threshold Transmitter signal mA Voltage across TP1 TP2 V 17 14 9 2 98 18 15 5 3 10 19 16 2 3 24 20 16 8 3 36 21 Normal reading 22 18 1 3 62 23 18 7 3 74 24 19 4 3 88 ...

Page 33: ...he pellistor board to simulate a sensor signal Measure the voltage across test points TP1 and TP2 to determine the alarm threshold If the unit has a display you can use the display reading to give additional confirmation that the alarm set points are correct Alarm threshold of 0 100 range Voltage across TP1 TP2 V 10 1 12 15 1 28 20 1 44 25 1 60 30 1 76 VR1 A1 A2 A3 ...

Page 34: ... A2 alarm 1 Turn A2 potentiometer fully clockwise 2 Adjust VR1 until voltage across TP1 and TP2 is at the required threshold 3 Turn A2 potentiometer anticlockwise until the A2 alarm trips To set A3 alarm 1 Turn A3 potentiometer fully clockwise 2 Adjust VR1 until voltage across TP1 and TP2 is at the required threshold 3 Turn A3 potentiometer anticlockwise until the A3 alarm trips If an alarm is not...

Page 35: ...d display board Adjust contrast potentiometer on display board 3 Self test routine fails Replace display board 4 Under range displayed Check transmitter connections Check and measure loop current 4 20 units Ensure links fitted to positions A B C D and E of SK2 on main board 5 24 Vdc output too low Check loading is 100mA 6 A1 or A2 24 Vdc output too low Check loading is 100mA Reduce load 7 AC outpu...

Page 36: ...rm relays A1 A2 A3 single pole changeover max 250 VAC 3 A max 30 VDC 2 A energise on alarm Fault relay single pole changeover max 250 VAC 3 A max 30 VDC 2 A normally energised de energise on fault Inhibit relay single pole changeover max 250 VAC 3 A max 30 VDC 2 A energise on alarm Visual outputs with display board fitted AC power on LED DC power on LED A1 A2 and A3 alarm LEDs Fault LED Inhibit LE...

Page 37: ... Parity none Flow control Xon Xoff Part numbers Description Part number Regard 1 4 20 4208585 Regard 1 SE Ex 4208600 Accessories and spare parts Pellistor board 4208582 Options board 4208583 Lead acid batteries 2 off 4208586 Display board V1 4208581 Display board V2 4208636 Calibration screwdriver 4208595 PC connection lead 4208596 Light pipes 4208589 ...

Page 38: ...Issue 6 December 2006 38 EC type examination certificate ...

Page 39: ...Issue 6 December 2006 39 ...

Page 40: ...Issue 6 December 2006 40 ...

Page 41: ...Issue 6 December 2006 41 ...

Page 42: ...Issue 6 December 2006 42 x Display board V2 0 is not included in the scope of this type examination x The options board is not included in the scope of this type examination ...

Page 43: ...s intended for use in potentially explosive atmospheres is in conformance with the EC Type Examination Certificate BVS 03 ATEX G 011 X for equipment group and category II 2 G issued by EXAM BBG Prüf und Zertifizier GmbH Dinnendahlstrasse 9 44809 Bochum Germany Notified body number 0158 Harmonized standards EN 61779 1 2000 A11 2004 EN 61779 4 2000 EN 61779 5 2000 EN 50104 2002 A1 2004 EN 50271 2001...

Page 44: ...Issue 6 December 2006 44 ...

Page 45: ...ange A2 Unit A3 Gas Oxygen O2 A1 vol rising falling Range 0 5 25 100 A2 vol rising falling Unit vol A3 vol rising falling Gas Ammonia NH3 A1 ppm Range 0 100 300 1000 A2 ppm Unit ppm A3 ppm Gas Carbon monoxide CO A1 ppm Range 0 100 300 1000 A2 ppm Unit ppm A3 ppm Gas Hydrogen sulphide H2S A1 ppm Range 0 20 50 100 A2 ppm Unit ppm A3 ppm ...

Page 46: ...Issue 6 December 2006 46 ...

Page 47: ...Issue 6 December 2006 47 ...

Page 48: ...ustrial Estate Blyth Northumberland NE24 4RG United Kingdom Tel 44 1670 352891 Fax 44 1670 544475 Manual part number 4208591 This manual supersedes and replaces the following manuals 4208603 issue 1 4208591 issue 5 For use with display board firmware r1 00 and r1 01 ...

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