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D-Guard² Instruction Manual

Item Number 201018

10 What is in the Box?

Item

Description

D-Guard² gas detector

D-Guard² Service Tool. The service tool activates

the internal menu magnetic sensors and includes an

integrated 4mm hex key to open the enclosure.

The Quick Start Guide (QSG) provides a brief overview

of the installation and operation of the D-Guard² gas

detector.

Calibration Certificate. The D-Guard² is factory calibrated

before dispatch.

Calibration plug

Figure 3. List of supplied items.

Summary of Contents for D-Guard2

Page 1: ...INSTRUCTION MANUAL t 61 8 6108 0000 e info gastech com w gastech com t e w D...

Page 2: ...h an oxygen sensor to measure the oxygen concentration in the environment The D Guard detects gas via diffusion to the sensor at normal atmospheric pressure 3 For Your Safety WARNING You must obey the...

Page 3: ...ess the calibration menu 16 15 2 Attach the calibration gas to the D Guard 17 15 3 Calibration Modes 18 15 4 Calibration Trend Bar 18 15 5 Auto Zero Calibration 19 15 6 Auto Span Calibration 20 15 7 M...

Page 4: ...onditions 47 24 Specifications 48 24 1 Enclosure Specifications 48 24 2 Mechanical Specifications 50 24 3 General Specifications 51 24 4 Wiring Requirements 51 24 5 D Guard General Versions Gas Range...

Page 5: ...Figure 17 Sensor gain warning 30 Figure 18 Minimum alarm level warning 33 Figure 19 Maximum alarm level warning 33 Figure 21 AL1 Latched 36 Figure 20 AL1 and AL2 Latched 36 Figure 22 AL2 Latched 36 Fi...

Page 6: ...libration plug Calibration adapter No Symbol Full Scale The user selectable range of the detector This cannot exceed the maximum range of the sensor No Symbol Suppression Band The suppression band pre...

Page 7: ...ersonal gas detector this can cause injury or death to personnel WARNING Do not use the D Guard in an explosive or oxygen rich atmosphere An explosion can cause injury or death to personnel 8 Safety P...

Page 8: ...l activates the internal menu magnetic sensors and includes an integrated 4mm hex key to open the enclosure The Quick Start Guide QSG provides a brief overview of the installation and operation of the...

Page 9: ...rtically to a suitable flat surface Make sure the cable gland faces the ground Use the two mounting eyes with M6 fasteners suitable for the surface type Make sure the data plate on the right hand side...

Page 10: ...nstallation WARNING The D Guard must be installed by an approved person Incorrect installation can cause injury or death to personnel Step 2 Open the D Guard enclosure Socket Head Cap Screws Socket He...

Page 11: ...CAUTION You must recalibrate the D Guard if its results do not agree with this specification See section 15 CAUTION The D Guard must be response tested when it is first commissioned and as necessary d...

Page 12: ...Right NOTE If an icon is not shown that adjacent magnetic sensor has no function on that screen D The D Guard menu system is controlled by the magnetic service tool supplied Four magnetic sensors loca...

Page 13: ...unit NOTE The D Guard is ready for use after the one minute warm up has ended Figure 7 D Guard splash screen Figure 8 D Guard at sensor warm up Figure 9 D Guard normal operating screen WARNING You mu...

Page 14: ...n display layout 14 3 Unlock the menu screen Put the service tool over the magnetic sensor location closest to the padlock icon for at least one second to unlock the D Guard NOTE If no passcode is set...

Page 15: ...Please Contact Gastech if you have forgotten the passcode Step 1 Change the value with the keys Step 2 Accept the value with the key Step 3 Accept the value with the key Step 4 Accept the passcode wi...

Page 16: ...ll auto lock after a ten second delay WARNING Use the calibration plug for each calibration or bump test Incorrect calibration can result in injury or death to personnel The D Guard is factory calibra...

Page 17: ...normally aspirated gas detector that operates at normal atmospheric pressure A calibration plug is provided to make sure that gas is applied directly to the sensor Step 1 Remove the Splash Guard Step...

Page 18: ...ides a clear visual indication of the rate of change of the detected gas concentration levels 15 4 Calibration Trend Bar The D Guard has two calibration modes Auto and Manual The Auto calibration mode...

Page 19: ...place of zero grade air Step 1 Use to go into the auto zero mode Step 5 Use to exit or to cancel Step 6 Calibration completed NOTE The D Guard Auto Calibration mode determines when the rate of change...

Page 20: ...E The D Guard Auto Calibration mode determines when the rate of change of the applied gas has decreased to less than 0 1 of full scale per second Access the calibration menu See section 15 1 Step 2 Ap...

Page 21: ...or death to personnel Step 4 Use to exit or to continue Step 1 Use to go into manual zero mode Step 5 Use to exit or to cancel Step 6 Calibration completed NOTE The D Guard Trend Bar is used to deter...

Page 22: ...save Step 4 Use to exit or to continue Step 1 Select to go into manual span mode Step 5 Use to exit or to cancel Step 6 Calibration completed Step 2 Apply the correct gas Use to adjust NOTE The D Gua...

Page 23: ...screens can be scrolled in both directions The system information screens provide information about the hardware and firmware installed in your D Guard The sensor information screen contains useful d...

Page 24: ...rated by the D Guard Make sure the menu system is unlocked See section 14 3 Step 1 Use to go into the status menu Step 2 Use to return to the home screen 17 1 Clear Latched Alarms Latched alarms must...

Page 25: ...menu Step 2 Use to go into the sensor settings The D Guard is factory configured when received Use the Sensor Settings menu to change the user configurable parameters Step 3 Use to go into the full s...

Page 26: ...sor Gain Warning 18 2 Set Detector Full Scale NOTE The full scale reading cannot be greater than the range of the fitted sensor Step 4 Use to go back or continue Step 3 Use to return to the settings m...

Page 27: ...pan gas must be less than or equal to the full scale range If you try to set the span gas concentration higher the D Guard will show you Figure 15 Span Gas Concentration Warning Step 4 Use to go back...

Page 28: ...ection 18 1 Step 1 Use to exit or to set the span gas Step 2 Use to adjust then to save Step 4 Use to go back or to continue Step 3 Use to return to the settings menu CAUTION Do not use fresh air for...

Page 29: ...n band prevents the D Guard from displaying small changes in the detected gas level close to zero It is set to 1 of the full scale value and can be on or off Access the Sensor Settings Menu See sectio...

Page 30: ...tween sensors of the same type or to change the full scale value for a sensor Access the Sensor Settings Menu See section 18 1 Step 2 Use to adjust then to apply Step 1 Use to exit or to set suppressi...

Page 31: ...n to continue You can configure the D Guard alarms The D Guard has two alarms Alarm 1 AL1 and Alarm 2 AL2 All alarm settings can be configured independently of each other Step 2 Use to highlight alarm...

Page 32: ...to go back or to continue Step 3 Use then to apply NOTE You can set the alarm direction for each alarm independently The options are rising or falling Access the Alarm Settings Menu See section 19 1...

Page 33: ...e section 19 1 Step 2 Use to highlight the level menu Step 3 Use to go into the level menu Step 4 Use to adjust then to save Figure 18 Minimum alarm level warning Figure 19 Maximum alarm level warning...

Page 34: ...e de energised or energised The D Guard has an additional fault relay This is not user configurable Access the Alarm Settings Menu See section 19 1 Step 1 Use to go back or to continue Step 3 Use to g...

Page 35: ...s latching alarms LATCH ENABLED or as non latching alarms LATCH DISABLED Access the Alarm Settings Menu See section 19 1 Step 5 Use to go back or to continue Step 3 Use to got into the latch menu Step...

Page 36: ...nstruction Manual Item Number 201018 36 19 6 Latched Alarm Examples CAUTION You must clear the latched alarm manually See section 17 1 Figure 20 AL1 and AL2 Latched Figure 21 AL1 Latched Figure 22 AL2...

Page 37: ...system is unlocked See section 14 3 Step 1 Use to go into the settings menu You can configure the Passcode You can isolate the D Guard if required 20 1 Access the System Settings Step 3 Use to go into...

Page 38: ...njury or death to personnel Step 1 Use to go into the isolate menu Step 3 Use to cancel or to apply Step 4 Select or to go back Access the System Settings menu See section 20 1 Step 2 Use then to appl...

Page 39: ...e configuration and operation of the D Guard Step 3 Use to cancel or to apply Access the System Settings menu See section 20 1 Step 1 Use to go into the passcode menu Step 2 Use to go back or to conti...

Page 40: ...e The passcode limits access to the configuration and operation of the D Guard Access the System Settings menu See section 20 1 Step 1 Use to go into the passcode menu Step 2 Use to highlight the syst...

Page 41: ...Make sure the menu system is unlocked See section 14 3 Step 1 Use to go into the settings menu Step 3 Use to go into the menu Step 4 Use then to continue You can configure the D Guard advanced settin...

Page 42: ...to go into the menu Step 4 Use to set then to save 21 2 System Calibration Access the Advanced Settings menu See section 21 1 Step 1 Use to go into the advanced menu Step 2 Use to go into system calib...

Page 43: ...t You can test the D Guard 4 20mA current loop output Access the Advanced Settings menu See section 21 1 Step 1 Use to go into the advanced menu Step 2 Use to highlight system tests Step 4 Use to go i...

Page 44: ...on Test Step 3 Use to go into the system tests You can test the D Guard relays Access the Advanced Settings menu See section 21 1 Step 1 Use to go into the advanced menu Step 2 Use to highlight system...

Page 45: ...The Sensor Life value is for indication purposes only It can be viewed on the information screen Step 3 Use to go into reset sensor life You can reset the D Guard estimated life of the fitted sensor Y...

Page 46: ...e recalibrated before use Step 4 Use to go back or to load preset Step 5 Use to go back Step 3 Use to go into load sensor preset You can use this menu to load one of the D Guard sensor presets Access...

Page 47: ...SENSOR UNDER RANGE 11 OVER TEMPERATURE 12 UNDER TEMPERATURE 13 SENSOR END OF LIFE 14 SENSOR FAULT 15 CALIBRATE AMBIENT C 16 NOT CONFIGURED 17 SENSOR NOT READY 18 SENSOR WARM UP 19 ISOLATED Use the Sta...

Page 48: ...Guard Instruction Manual Item Number 201018 48 24 Specifications Specifications are subject to change without notice Figure 26 D Guard dimensions in millimetres front view 24 1 Enclosure Specification...

Page 49: ...D Guard Instruction Manual Item Number 201018 49 Figure 27 D Guard dimensions in millimetres side view...

Page 50: ...closure IP rating IP66 IP67 68 Enclosure lid Retainer Not retained Enclosure lid fixing Four screws M5x12 Cable gland M20 Cable Gland IP68 Enclosure footprint Including mounting supports 147mm high 16...

Page 51: ...13V Maximum loop resistance At a supply voltage of 22V 380 Maximum supply voltage General Relay and Siren versions 28V Loop error signal Isolated or fault 3 5mA Loop error signal Over range 21mA Disp...

Page 52: ...Vol 1 5 0 01 0 05 65 1080GH ETO EtO PPM 20 0 1 0 1 65 1080GH H2S 10 H2S PPM 10 0 1 0 05 65 1080GH H2S 25 H2S PPM 25 0 1 0 05 65 1080GH H2S 100 H2S PPM 100 0 1 0 05 65 1080GH H2S 200 H2S PPM 200 1 0 5...

Page 53: ...eriods in months Replacement Sensor Target Gas Warranty 65 8080 C3H8 C3H8 24 65 8080 CH4 01 CH4 24 65 8080 CH4 CH4 24 65 9094 CL2 2 Cl2 12 65 8001 CO AF CO 12 65 8080 CO2 CO2 24 65 8013 ETO A1 EtO 12...

Page 54: ...tem Number 201018 54 26 Replacement Parts Figure 33 D Guard replacement parts exploded view You can purchase replacement parts for your D Guard from Gastech or its authorised service centres 26 1 Repl...

Page 55: ...x12 5 21 1080 03 Lid Housing D Guard 6 07 1080 01 Sensor gasket Not for IR sensors 7 See section 25 1 Sensor 8 57 0028 Main PCB assembly 9 07 1010 10 O ring 10 11 1080 02 Nylon bolt M5x6 11 10 1010 01...

Page 56: ...O2 Do Not Fit Do Not Fit Do Not Fit 65 8013 ETO A1 EtO Do Not Fit Do Not Fit Do Not Fit 65 8008 H2S A1 H2S Do Not Fit Do Not Fit Link Fitted 65 8008 H2S AE H2S Do Not Fit Do Not Fit Link Fitted 65 909...

Page 57: ...ide of the D Guard for moisture ingress Replace the main seal as required 28 3 Visual Inspection Figure 37 Splash Guard Make sure all fastenings and cable glands are secure Remove the Splash Guard fro...

Page 58: ...the symbol indicates registration in the United States and the is in Australia registrations may not have been issued at present in other countries All other product names and logos are trademarks of...

Page 59: ...stech com HEAD OFFICE 24 Baretta Road Wangara WA 6065 Phone 61 8 6108 0000 SYDNEY OFFICE Suite G01 10 Tilley Lane Frenchs Forest NSW 2086 Phone 61 2 9451 0054 BRISBANE OFFICE PO Box 349 Cannon Hill QL...

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GasTech D-Guard2, Instruction Manual

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