Crowcon Xgard Bright Installation, Operation And Maintenance Instructions
Gas detectors with display and relays
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- Installation, operation and maintenance instructions (28 pages) ,
- User's and operator's manual (128 pages)
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Summary of Contents for Crowcon Xgard Bright
- Page 1 Xgard Bright Gas Detectors with Display and Relays Installation, Operation and Maintenance Instructions M070068 Issue 5 December 2020...
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Page 3: Table Of Contents
Contents 1. Introduction ................1 1.1 Product overview .............. 1 1.2 Safety information ............1 1.3 Storage instructions ............2 1.4 Certification labels ............3 1.5 Product dimensions ............4 1.6 Exploded view ..............5 2. Installation ................6 2.1 Location ................6 2.2 Mounting ................. -
Page 5: Introduction
Xgard Bright is ATEX and IECEx Ex db IIC T6 Gb flameproof certified for use in Zone 1 or 2 hazardous gas areas and Ex tb IIIC T80°C Db for use in Zone 21 or 22 hazardous dust areas. -
Page 6: Storage Instructions
Introduction • The lid on Xgard Bright must be kept tightly closed until power to the detector is isolated otherwise ignition of a flammable atmosphere can occur. Before removing the cover for maintenance, ensure the surrounding atmosphere is free of flammable gases or vapours. -
Page 7: Certification Labels
Introduction 1.4 Certifi cation labels ATEX and IECEx certifi cation label Gas name and range label Warning label Diagram 1: Xgard Bright Certifi cation Labels... -
Page 8: Product Dimensions
Introduction 1.5 Product dimensions All dimensions in millimetres Diagram 2: Xgard Bright dimension view... -
Page 9: Exploded View
Introduction 1.6 Exploded view Diagram 3: Xgard Bright exploded view... -
Page 10: Installation
The following points should be noted when locating gas detectors: • To detect gases which are lighter than air, detectors should be mounted at high level and Crowcon recommend the use of a collector cone (Part No. C01051). -
Page 11: Mounting
Installation 2.2 Mounting Xgard Bright should be installed at the designated location with the sensor pointing down. This ensures that dust or water will not collect on the sensor and stop gas entering the cell. Care should be taken when installing the detector to avoid damaging the painted surface of the enclosure. -
Page 12: General Cabling Requirement
24.2. Xgard Bright has min voltage requirement of 10V. The alarm 2 current for Xgard Bright (pellistor) is 95mA, Xgard Bright (IR) is 90mA, Xgard Bright (MPS) is 34mA and the sounder output max current is 0.25 A, so a total current for the pellistor in alarm driving the sounder output is: Max current = 0.25 + 0.095 = 0.345 A. -
Page 13: Cabling Requirement Multidrop Modbus
Example Calculation 2 As example calculation 1 but without the sounder. Xgard Bright pellistor requires a dc supply of 10-30V, at max current in alarm 2 of 95mA. Ensure there is a minimum of 10V at the detector, taking into account the voltage drop due to cable resistance. -
Page 14: Calculating Acceptable Cable Length And Detector Quantities
RS-485 A and B connections to the appropriate terminals. Two sets of RS-485 terminals and a spare cable gland entry (sealed with a stopping gland by Crowcon) are provided to enable signals to be ‘looped’ to the next detector easily. - Page 15 5. The maximum detector voltage of 30V must not be exceeded. Example Calculation using the above rules How many Xgard Bright can be put on a multidrop cable if: 1. The controller has a guaranteed minimum output voltage of 18V.
- Page 16 Installation So consider the voltage to the detector furthest (n=1) from the controller has to be 10V. Each cable segment has a there and back resistance of 12.1 x 2 x 20/1000 = 0.484 ohms. So the cable volts drop to detector (n=2) is: Vc = 0.070 x 0.484 = 0.03388V V(n=2) = V(n=1) + Vc = 10.0338 V Now the voltage at detector (n=3) is...
- Page 17 Installation Tabulating the results for each detector position we get: Detector Voltage at Cable current (A) Cable voltage Detector (V) drop (V) 0.070 0.03388 10.03388 0.14 0.06776 10.10164 0.21 0.10164 10.20328 0.28 0.13552 10.3388 0.35 0.1694 10.5082 0.42 0.20328 10.71148 0.49 0.23716 10.94864...
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Page 18: Earthing Requirements
Installation 2.7 Earthing requirements Earth terminals are provided on the outside of the Xgard Bright enclosure adjacent to the top-right cable entry, and internally adjacent to the left-hand sounder out cable connector. For electrical safety it is essential that the Xgard Bright enclosure is bonded to earth, usually using the external earth lug, if an earth cable is provided in the fi eld cable the internal earth point can be used. -
Page 19: Cable Glands
Allow suffi cient length of cable to the detector, fi t shroud if required, pass the cable through cable gland. 1. Screw the gland Entry into the Xgard Bright M20 cable Entry. Using two spanners or wrenches, hold the gland Entry in position to prevent rotation and tighten the Middle Nut until resistance is felt between the Seal and cable. - Page 20 Installation Armoured cable Backnut Compression Spigot Compression seal Middle Nut Reversible Armour Clamping Ring Armour Spigot Inner seal Entry 1. Expose the armour/braid “A” by stripping the cable's armoured / woven layer and removing the cable fi ller. A=15mm 2. Push the cable through the Armour Spigot.
- Page 21 2. Only cable glands ATEX and IECEx certifi ed Exd Flameproof may be used with Xgard Bright. 3. Cable glands must have a minimum ingress protection rating of IP66.
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Page 22: Fitting Accessories
Installation 2.9 Fitting accessories Collector cone (product code C01051) Aids detection of lighter than air gases such as hydrogen or methane. Includes a pipe spigot for application of bump test gas. Spray deflector (product code C01052) For outdoor installations and sensor protection from water sprays. -
Page 23: Operation
3.1 Operation panel The Xgard Bright operation panel comprises an OLED screen, a three-colour status LED and two magnetically operated Hall Effect switches. The screen displays white characters on a black background and can be viewed clearly even in bright sunlight. -
Page 24: Start Up
Operation 3.3 Start up When the Xgard Bright is powered up, the unit will perform internal diagnostic checks whilst the display will show a Crowcon logo. This procedure will be displayed for about 45 seconds followed by displaying a warming up status for about 120 seconds. -
Page 25: Menu Functions
Operation 3.4 Menu functions Enter/Menu key Scroll key From the gas display screen, use the supplied magnetic wand to select the Enter/Menu key to show password screen. Enter the password: ‘0000’ to display the following menu. Select the Scroll key to change the displayed number, and the Enter/Menu key to move to the next integer. -
Page 26: Zero
Adjust the value shown to match the calibration gas concentration, to continue, long press left key ‘/OK’ to accept the calibration level. Connect the calibration cap to the Xgard Bright and then connect the appropriate gas cylinder to the adapter. When the gas reading is stable press the... -
Page 27: Routine Maintenance
Ensure the associated control panel is inhibited so as to prevent false alarms. Service and maintenance work should be carried out by Crowcon, an approved service centre or by suitably qualified and trained personnel. Site practices and conditions will dictate the frequency with which detectors are tested and calibrated. -
Page 28: Sensor Replacement
4. Fit the replacement sensor (having checked that the part number matches that stated on the detector junction box label). Take care to align the locating pins correctly with the slots in the Xgard Bright enclosure. 5. Re-fit the sensor retainer having first inspected the sinter to make sure that it has not become contaminated. -
Page 29: Specifications
24Vdc (nominally), 0.7A maximum load Operating temperature -40°C to +70°C (-40°F to 158°F) Note: sensor operating temperatures vary. Refer to the sensor module datasheet or contact Crowcon for specific sensor data. Humidity 0 to 95% RH, non-condensing Repeatability +/- 2% FSD... -
Page 30: Spare Parts
M03871 M03870 Xgard Bright Threaded Hex Spacer 10mm (M4) M03760 Xgard Bright Spare M4 x 8 Posi Pan Head Screw (Customer may require 7) Xgard Bright M3x6 Grub Screw (Customer may require 2) M03810 Xgard Bright Spare M20 to 1/2" NPT Adapter... - Page 31 Spare parts S015123/S XGB Spare Sensor Module Propane IR 0-100% LEL S015128/S XGB Spare Sensor Module Butane IR 0-100% LEL S015122/S XGB Spare Sensor Module Pentane IR 0-100% LEL S015129/S XGB Spare Sensor Module LPG IR 0-100% LEL S015135/S XGB Spare Sensor Module Flam MPS 0-100% LEL...
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Page 32: Warranty
Limitation of Liability: Except where prohibited by law, Crowcon will not be liable for any loss or damage arising from the Crowcon product, whether direct, indirect, special, incidental or consequential, regardless of the legal theory asserted, including... - Page 33 Warranty Our postal address is: Crowcon Detection Instruments Ltd. (UK Head Office) 172 Brook Drive Milton Park Oxfordshire OX14 4SD...
- Page 36 UK Offi ce Singapore Offi ce Crowcon Detection Instruments Ltd Crowcon Detection Instruments Ltd 172 Brook Drive, Block 194, Pandan Loop Milton Park, #06-20 Pantech Industrial Complex Abingdon Singapore 128383 Oxfordshire Tel: + 65 6745 2936 OX14 4SD Fax: +65 6745 0467 Tel: +44 (0) 1235 557700 Email: sales@crowcon.com.sg...
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