Dräger REGARD-1 Installation, Operation And Maintenance Manual
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Dräger REGARD-1 Installation, Operation And Maintenance Manual

Single-channel controller
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Dräger REGARD-1
Single-channel controller
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Installation, operation and maintenance guide

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  • Page 1 Dräger REGARD-1 Single-channel controller Installation, operation and maintenance guide...

  • Page 3: Table Of Contents

    Contents Contents For your safety ......................7 Intended use ........................9 CE marking and ATEX approval ....................10 Other tests and approvals ......................10 Special conditions for safe use according to EC type examination certificate BVS 03 ATEX G 011 X ....................11 Description........................
  • Page 4 Contents Maximum cable resistance for three-wire-transmitters ..............24 Two-wire 4-20 mA transmitter with safety barrier ................25 Polytron SE Ex (Pellistor) measuring head..................26 Relay outputs..........................27 24 V digital outputs for A1 and A2....................28 Remote reset input........................29 Configuration and calibration ..................30 Set measuring range ........................30 Calibrating a 4-20 unit ........................33 Zero calibration ...........................
  • Page 5 Contents Part numbers ....................... 52 EC type-examination certificate ................. 53 EC Declaration of Conformity ..................58 Front panel label......................59 Index..........................61 Issue 5 - June 2005 Page 5 of 64 Pages...

  • Page 7: For Your Safety

    For your safety For your safety NOTE Observe the instructions for use Follow the instructions for installation, operation and maintenance. maintenance The device must be inspected and serviced regularly by trained personnel. Keep a record of inspections and servicing. Repairs of this device may only be carried out by competent personnel. We recommend that either a Dräger Safety training course or a DrägerService service contract be obtained and that all repairs are carried out by DrägerService.
  • Page 8 For your safety Draeger Safety UK Limited can not be held responsible for any damage caused by non- compliance with the above recommendations. The warranty and liability provisions of the terms and conditions of sale and delivery of Draeger Safety UK Limited are likewise not modified by the recommendations given above.

  • Page 9: Intended Use

    The SE Ex device will not work with the Dräger SE Ex LC measuring head. Both devices are suitable for use in residential, commercial and industrial environments. The Regard-1 controller is certified according to the directive 94/9/EC (ATEX Directive) to be operated with performance approved 4-20 mA transmitters (EC-type examination certificate BVS 03 ATEX G 011X), or with Dräger SE Ex pellistor measuring heads.

  • Page 10: Ce Marking And Atex Approval

    In addition to the measuring function for flammable gases in the range 0 to 100 %LEL and for oxygen (inertisation) in the range 0 to 25 %(V/V), Regard-1 has been tested according to DIN EN 45544-1 combined with DIN EN 45544-2 for toxic gases, and according to DIN EN 50104 for oxygen enrichment and oxygen deficiency, by EXAM BBG Prüf- und Zertifizier GmbH, Dinnendahlstrasse 9, 44809 Bochum, Germany.

  • Page 11: Special Conditions For Safe Use According To Ec Type Examination Certificate Bvs 03 Atex G 011 X

    The alarm relays must be set latching when using transmitters with an output current which can fall below 20 mA for concentrations above full scale. Regard-1 SE Ex: As a minimum, the relay of the main alarm (highest alarm threshold value) must be set latching.

  • Page 12: Description

    Description Description The device is available in two versions: 4-20 mA or SE Ex, with or without gas level display. An additional “Options circuit board” is available that provides an isolated 4-20 mA output, TWA alarm relay and data logger with RS-232. Two 1.2AH lead-acid batteries can be fitted inside the device’s enclosure to provide continued operation for several hours if AC power is interrupted.

  • Page 13: Main Circuit Board

    Description Main circuit board 1. Terminals for batteries or external DC input. 2. Connector for display board. 3. Potentiometers for A1 – A3 alarms and display adjustment. 4. Field device connecting terminals. 5. Connector for options circuit board. Issue 5 - June 2005 Page 13 of 64 Pages...

  • Page 14: Field Device Connecting Terminals

    Description Field device connecting terminals Function External reset input Reset 4-20 mA output (requires options circuit board) - 20 mA + 24 VDC output for safety barrier (100 mA max.) - 24 V + 4-20 mA transmitter or SE Ex sensor input - Input + 10- 11+ A1 24 V switched output (100 mA max.)

  • Page 15: 24 V Battery Terminals

    Description 24 V battery terminals For continued operation of the controller when the AC supply fails connect two 12 V/1.2 AH lead-acid batteries in series to the battery terminals. If unsealed batteries are fitted, that could generate hydrogen when charged, drill a vent hole in the top of the enclosure.

  • Page 16: Fuses

    Description Fuses Display board The display shows the gas level, or indicates that the gas level exceeds the measuring range (over-range) or is below the measuring range (under-range). Examples 0.50 Normal gas level display. Negative display reading. A negative display reading - 0.5 may be caused by inaccurate calibration or by drift or temperature effect of the sensor.
  • Page 17 Description -Ur- Under-range: Reading below measuring range. Over-range: reading above measuring range. The over-range indication is latching and can only be -Or- cleared when the reading is again within the measuring range. Press Reset to clear the over-range indication. There are two versions of the display board: V1 displays gas level, under-range and over-range, and calculates a TWA gas level •...

  • Page 18: Display Of Measuring Range, Gas And Unit

    Pellistor board The pellistor board supplies a constant current to the sensor and amplifies the signal from the sensor. To fit the pellistor board to a Regard-1 4-20: Remove all the links from SK2 on the main circuit board •...

  • Page 19: Options Circuit Board

    Description Options circuit board The options circuit board provides: TWA alarm relay (requires display board V2 to operate) • 4-20 mA output proportional to gas level • datalogger output • Fit the options circuit board onto SK6 and SK9 on the main circuit board. RS-232 data logger output...
  • Page 20 Description RJ11 socket RS 232 Sub D – 9 Pole Function Function Data are sent by the controller as ASCII characters Data rate: 2400 Baud Data bits: Stop bits: Parity: none Protocol: Xon / Xoff The gas level is and TWA are printed once every second. Example: Gas 20.1 TWA 0.1 To reset the TWA value to zero, hold the device’s reset pushbutton pressed for 10s, or hold the remote reset input closed for 10s, until the display shows tA-0.

  • Page 21: Installation

    Installation Installation Installation environment When selecting the installation place, consider the following: Locate the device where the display and indicators are easily seen, and controls are • accessible The device is not “explosion proof” and may not be installed in a hazardous area •...

  • Page 22: Ac Supply

    Installation Mounting points dimensions (not to scale): NOTE 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 device. If the AC supply to the device is from an AC socket, the maximum allowed length of cable between the socket and the unit is 3m.

  • Page 23: Connecting Transmitters And Measuring Heads

    NOTE Use cable with braided copper screen. Three-wire 4-20 mA transmitter Only for a transmitter with 4-20 mA source output. Regard-1 will not work with a three- wire transmitter that has a 4-20 mA sink output. NOTE Use cable with braided copper screen.

  • Page 24: Maximum Cable Resistance For Three-Wire-Transmitters

    Regard-1 to the transmitter (in ohms), cable is the transmitter operating current (in mA). This formula assumes that the three cores of the connecting cable each have the same resistance.

  • Page 25: Two-Wire 4-20 Ma Transmitter With Safety Barrier

    Installation Two-wire 4-20 mA transmitter with safety barrier The following diagram shows the general arrangement. Refer to specific instructions for safety barrier and transmitter for connections between transmitter and barrier, and for instruction for earthing of barrier, where necessary. NOTE Use cable with braided copper screen.

  • Page 26: Polytron Se Ex (Pellistor) Measuring Head

    Installation Polytron SE Ex (Pellistor) measuring head NOTE Use cable with braided copper screen. CAUTION! Do not connect the sensor/measuring head when the controller is powered: this will damage the sensor. Maximum cable resistance The maximum allowed cable resistance is 7 ohms per core with the Dräger SE Ex sensor.

  • Page 27: Relay Outputs

    Installation Relay outputs Relay contacts when relays are in their normal state (i. e., no alarm): A1 relay A2 relay TWA relay A3 relay Fault relay Inhibit relay The fault relay is energised in its normal state (i. e., when there is no fault). Unscreened cable can be used for relay outputs.

  • Page 28: 24 V Digital Outputs For A1 And A2

    Installation 24 V digital outputs for A1 and A2 NOTE 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: Issue 5 - June 2005 Page 28 of 64 Pages...

  • Page 29: Remote Reset Input

    Installation Output voltage and current The voltage at the output decreases as the current drawn from the output increases. Output Current voltage available 22 V 30 mA 18 V 100 mA Remote reset input To acknowledge and reset alarms remotely from the controller, connect a normally-open switch to the remote reset terminals.

  • Page 30: Configuration And Calibration

    Configuration and calibration Configuration and calibration Set measuring range NOTE Use switch SW1 on the display board to set the display measuring range. The number of decimal places is fixed according to the measuring range. Issue 5 - June 2005 Page 30 of 64 Pages...
  • Page 31 Configuration and calibration For display board with version 1.00 or 2.00 firmware*, set the measuring range using this table: Measuring range 0 - 1 0 - 3 0 - 5 0 - 10 0 - 25 0 - 30 0 - 50 0 - 100 0 - 200 0 - 250...
  • Page 32 Configuration and calibration For display board with version 1.01 or 2.01 firmware*, set the measuring range using this table: Measuring range 0 - 1 0 - 3 0 - 5 0 - 8 0 - 10 0 - 20 0 - 25 0 - 30 0 - 50 0 - 100...

  • Page 33: Calibrating A 4-20 Unit

    Configuration and calibration The SW1-F switch sets the TWA function for all firmware versions: SW1-F Insert a card in the window above the display to show the measured gas and range. Pre-printed and blank labels are at the end of this manual. Calibrating a 4-20 unit NOTE For further information, please refer to the calibration instructions...
  • Page 34 Configuration and calibration Connect a voltmeter across TP1 and TP2 on the main circuit board: • If applying calibration gas to the transmitter: Apply calibration gas to the transmitter. Use a gas concentration that is between • 40% and 90% of measuring range. The transmitter must be correctly calibrated. Adjust potentiometer FS on the main circuit board until the voltage across TP1 and •...
  • Page 35 Configuration and calibration Location of FS (span adjust) potentiometer: FS: span adjust When simulating a gas level: If possible, adjust the output of the transmitter to 20 mA or to a value between • 12 mA and 20 mA. Adjust potentiometer FS on the main circuit board until the voltage across TP1 and •...

  • Page 36: Calibrating An Se Ex Unit

    Configuration and calibration Calibrating an SE Ex unit Use the controls on the pellistor board to set sensor current, calibrate zero and calibrate span: NOTE For further information, please refer to the calibration instructions in the measuring head’s operating manual. Set the sensor current 1.
  • Page 37 Configuration and calibration Drive current range 95 – 195 mA – – – 190 – 350 mA – – – The position of switches B, C and D does not matter yet. 2. Adjust the sensor current to the required value. Turn off the device by disconnecting the device's AC or DC supply or remove •...

  • Page 38: Zero Calibration

    Configuration and calibration Zero calibration Connect a voltmeter across TP1 and TP2 on the main circuit board. • Make sure that the ambient air is free of measured gas and other interfering gases • which could influence the sensor. Turn VR1 on the pellistor board until the voltage across TP1 and TP2 is •...

  • Page 39: Configuring Alarms

    Configuration and calibration WARNING! Do not change the position of switch SW1-A. For new Dräger Ex sensors, range 3 (110 – 160 mV) should work for most gases. If, during calibration, the gas reading does not reach the required value use a lower- numbered sensitivity range.

  • Page 40: A1 Alarm

    The alarm relays must be set latching when using transmitters with an output current which can fall below 20 mA for concentrations above full scale. Regard-1 SE Ex: As a minimum, the relay of the main alarm (highest alarm threshold value) must be set latching.

  • Page 41: A2 Alarm

    Configuration and calibration A2 alarm Mode of operation Rising Falling Non-latching Latching Not acknowledgeable Acknowledgeable A3 alarm Mode of operation Rising Falling Non-latching Latching Fault alarm Mode of operation Non-latching Latching The A1, A2 and A3 relays are energised on alarm. •...

  • Page 42: Setting Alarm Thresholds On 4-20 Units

    Configuration and calibration Setting alarm thresholds on 4-20 units Use the potentiometers marked A1, A2 and A3 on the main circuit board to set the alarm thresholds: A1 pot. A2 pot. A3 pot. WARNING! For safety relevant decisions only use status of Alarm/Fault LEDs and relays.
  • Page 43 Configuration and calibration Using a potentiometer : Connect the potentiometer between terminals 8 and 9. • Test potentiometer 1200 to 6000 ohms Test points TP1 + TP2 Using a 4-20 mA source loop calibrator Connect the loop calibrator between terminals 7 and 8. •...
  • Page 44 Configuration and calibration Use this table to set the alarm threshold. Measure the voltage across TP1 and TP2 corresponding to the required alarm threshold. Alarm threshold Voltage across TP1 & TP2 (V) (% of 0 – 100 range) 0.96 1.12 1.28 1.44 1.60...

  • Page 45: Setting Alarm Thresholds On Se Ex Units

    Configuration and calibration For oxygen deficiency and oxygen enrichment alarms, use this table to determine alarm thresholds for a 0 – 25% range: Alarm threshold Transmitter signal (mA) Voltage across TP1 & TP2 (V) 14.9 2.98 15.5 3.10 16.2 3.24 16.8 3.36 (Normal reading)
  • Page 46 Configuration and calibration Use VR1 on the pellistor board to simulate a sensor signal. Measure the voltage across test points TP1 and TP2 to determine the alarm threshold. If the device has a display you can use the display reading to give additional confirmation that the alarm set points are correct.
  • Page 47 After setting the alarm thresholds, adjust VR1 so that the voltage across TP1 and TP2 is 800 mV ± 20 mV. Regard-1 SE Ex has a fixed fault alarm threshold at about –5% of the measuring range. Issue 5 - June 2005...

  • Page 48: Maintenance

    Maintenance Maintenance Check the unit for operation regularly. Service the controller every 12 months. The transmitter or measuring head may require periodic recalibration. For further information, please refer to the operating manual for the transmitter or measuring head. If batteries are fitted to the control unit then these batteries should be maintained in accordance with the instructions of the battery manufacturer.
  • Page 49 Maintenance Fault Remedy A1 or A2 24 VDC voltage Current must be < 100 mA. output too low Reduce current. AC output failed Check loading does not exceed 500 mA Replace fuse. Incorrect measuring range Check setting of SW1 on display board No TWA information Set SW1-F on the display board to ON Water ingress...

  • Page 50: Specifications

    Specifications Specifications Regard-1 4-20 Regard-1 SE Ex 270 mm × 270 mm × 90 mm Dimensions Mass (without batteries) Approx. 2.5 kg Housing material ABS – VO Ingress protection IP 65 Cable entries 6x M20 AC supply 98 to 253 VAC, 50-60 Hz...
  • Page 51 Specifications Regard-1 4-20 Regard-1 SE Ex “AC power on” LED Visual outputs “DC power on” LED - with display board A1, A2 and A3 alarm LEDs, Fault LED, Inhibit LED fitted LCD gas level indicator 2- or 3-wire 3-wire Pellistor...

  • Page 52: Part Numbers

    Part numbers Part numbers Description Part number Regard-1 4-20 4208585 Regard-1 SE Ex 4208600 Accessories and spare parts Pellistor board 4208582 Options circuit board 4208583 Lead-acid batteries (2 off) 4208586 Display board V1 4208581 Display board V2 4208636 Calibration screwdriver...

  • Page 53: Ec Type-Examination Certificate

    EC type-examination certificate EC type-examination certificate Issue 5 - June 2005 Page 53 of 64 Pages...
  • Page 54 EC type-examination certificate Issue 5 - June 2005 Page 54 of 64 Pages...
  • Page 55 EC type-examination certificate Issue 5 - June 2005 Page 55 of 64 Pages...
  • Page 56 EC type-examination certificate Issue 5 - June 2005 Page 56 of 64 Pages...
  • Page 57 EC type-examination certificate Display board V2.0 is not included in the scope of this type-examination. • The options circuit board is not included in the scope of this type-examination. • Issue 5 - June 2005 Page 57 of 64 Pages...

  • Page 58: Ec Declaration Of Conformity

    EC Declaration of Conformity EC Declaration of Conformity DECLARATION OF CONFORMITY Draeger Safety UK Ltd Kitty Brewster Industrial Estate Blyth, Northumberland NE24 4RG England declare that REGARD–1 in accordance with Directive 94/9/EC (Equipment and protective systems 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...

  • Page 59: Front Panel Label

    Front panel label Front panel label Methane (CH4) %LEL Range 0 – 100 %LEL Unit %LEL %LEL Hydrogen sulphide (H Range 0 – 20 / 50 / 100 Unit Carbon monoxide (CO) Range 0 – 100 / 300 / 1000 Unit Ammonia (NH3) Range...
  • Page 60 Front panel label Range Unit Range Unit Issue 5 - June 2005 Page 60 of 64 Pages...

  • Page 61: Index

    Index Index 24 V battery terminals ....................15 24 V digital outputs......................28 A1 alarm ........................40 A2 alarm ........................41 A3 alarm ........................41 AC supply ........................22 Calibrate span ....................... 38 Calibrating a 4-20 unit ....................33 Calibrating an SE Ex unit ....................36 CE marking and ATEX approval..................
  • Page 62 Index Installation environment ....................21 Intended use ........................9 Liability for proper function or damage ................7 Location of FS (span adjust) potentiometer ..............35 Main circuit board......................13 Maintenance ......................7, 48 Maintenance inhibit jumper ................... 15 Maximum cable resistance..................24, 26 Measuring range ....................18, 31, 32 Mounting point dimensions ...................
  • Page 63 Index To set A1 alarm ......................47 To set A2 alarm ......................47 To set A3 alarm ......................47 TWA function......................... 33 Two-wire 4-20 mA transmitter with safety barrier ............25 Two-wire 4-20 mA transmitter ..................23 Zero calibration......................33, 38 Issue 5 - June 2005 Page 63 of 64 Pages...
  • Page 64 Draeger Safety UK Ltd Kitty Brewster Industrial Estate Blyth Northumberland NE24 4RG United Kingdom +44 1670 352891 +44 1670 544475 www.draeger-safety.com 4208591 en © Draeger Safety UK Ltd Issue 5 - June 2005 Subject to change...

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