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Summary of Contents for GasTech D-Guard2
- Page 1 INSTRUCTION MANUAL +61 8 6108 0000 info@gastech.com gastech.com...
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Page 2: Introduction
NOTE: Modification of this equipment is strictly prohibited without written permission from Gastech Australia Pty Ltd. 4 Further Information Please tell us if you want help with this equipment. Head Office: Gastech, 24 Baretta Road, Wangara, WA 6065, Australia. Phone: +61 8 6108 0000 Email: info@gastech.com Website: gastech.com Item Number 201018... -
Page 3: Table Of Contents
D-Guard² Instruction Manual Table of Contents 1 Introduction ......2 2 Method of Operation ..... . . 2 3 For Your Safety . - Page 4 28.3 Visual Inspection ..... . . 57 29 Gastech Policy Statements ..... 58...
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Page 5: List Of Figures
D-Guard² Instruction Manual 5 List of Figures Figure 1. D-Guard² ......2 Figure 2. Keywords and symbols used in this manual... . . 6 Figure 3. List of supplied items.. -
Page 6: Keywords And Symbols Used In This Manual
D-Guard² Instruction Manual 6 Keywords and Symbols Used in This Manual Symbol Keyword Description WARNING: Do not (warning text). Can cause injury or Warning death to personnel. CAUTION: Do not (caution text). Can cause damage Caution Symbol to parts or equipment. Service tool Combined magnetic wand and hex key service tool Calibration plug... -
Page 7: Intended Use
D-Guard² Instruction Manual 7 Intended use The D-Guard² is designed as a fixed gas detector with a 4-20 mA current loop output. The detector can interface with external equipment to transmit gas levels and trigger external alarm devices. WARNING: The D-Guard² detects toxic and flammable gases and oxygen concentrations. -
Page 8: What Is In The Box
D-Guard² Instruction Manual 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... -
Page 9: Installation Information
D-Guard² Instruction Manual 11 Installation Information WARNING: The D-Guard² must be installed by an approved person. Incorrect installation can cause injury or death to personnel. 11.1 D-Guard² Mechanical Installation The D-Guard² should be mounted vertically to a suitable flat surface. Make sure the cable gland faces the ground. -
Page 10: Electrical Installation
D-Guard² Instruction Manual 12 Electrical Installation WARNING: The D-Guard² must be installed by an approved person. Incorrect installation can cause injury or death to personnel. Socket Head Socket Head Cap Screws Cap Screws Step 1. Loosen the 4 screws holding the top case on. Step 2. -
Page 11: Response Test
D-Guard² Instruction Manual Step 3. Connect the D-Guard² as shown. The DC supply voltage range is 13 - 28 V. CAUTION: The outside diameter of the cable must be between 10 mm and 14 mm. Use a twin core shielded cable. Make sure the cable is sealed by the M20 cable gland to prevent moisture ingress. -
Page 12: Operation
D-Guard² Instruction Manual 14 Operation The D-Guard² menu system is controlled by the magnetic service tool (supplied). Four magnetic sensors, located behind the display window, are activated by the service tool. The four marks on the D-Guard² display match the magnetic sensor positions. The menu system uses custom icons and text to give information to the user. -
Page 13: Power Up
D-Guard² Instruction Manual 14.1 Power up Connect power to D-Guard² and energise the unit. Figure 7. D-Guard² splash screen. Figure 8. D-Guard² at sensor warm up. Figure 9. D-Guard² normal operating screen. NOTE: The D-Guard² is ready for use after the one minute warm up has ended. WARNING! You must do a response test before first use. -
Page 14: Home Screen Features
D-Guard² Instruction Manual 14.2 Home screen features The home screen is the main display that will be visible. It shows the installed gas sensor, range and the current reading. System alerts are displayed at the bottom. Sensor type and range Magnetic Sensor location Menu locked System status messages location... -
Page 15: Passcode Requested
Step 2. Accept the value with the key. Step 3. Accept the value with the key. Step 4. Accept the passcode with the key. Step 5. The menu is unlocked. Please Contact Gastech if you have forgotten the passcode. Item Number 201018... -
Page 16: Calibration
D-Guard² Instruction Manual 15 Calibration The D-Guard² is factory calibrated before dispatch. You must calibrate the D-Guard² regularly. Calibration adjusts the response of the D-Guard² to known concentrations of gas at two points, zero and span. Zero calibration uses zero-grade air or fresh air, which does not contain any trace of the detectors intended target gas. -
Page 17: Attach The Calibration Gas To The D-Guard²
D-Guard² Instruction Manual 15.2 Attach the calibration gas to the D-Guard² The D-Guard² is a 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. -
Page 18: Calibration Modes
D-Guard² Instruction Manual 15.3 Calibration Modes The D-Guard² has two calibration modes, Auto and Manual. The Auto calibration mode checks that the rate of change of the detected gas has decreased to less than ± 0.1% of full scale per second, and adjusts the D-Guard² response automatically. -
Page 19: Auto Zero Calibration
D-Guard² Instruction Manual 15.5 Auto Zero Calibration. Access the calibration menu. See section 15.1. NOTE: Fresh air can be used in place of zero-grade air. Step 1. Use to go into the auto zero mode. Step 2. Apply the correct gas. Use to start. -
Page 20: Auto Span Calibration
D-Guard² Instruction Manual 15.6 Auto Span Calibration Access the calibration menu. See section 15.1. Step 2. Apply the correct gas. Use to start. Step 1. Use to go into the auto span mode. Step 3. Use to save or to cancel. Step 4. -
Page 21: Manual Zero Calibration
D-Guard² Instruction Manual 15.7 Manual Zero Calibration Access the calibration menu. See section 15.1. NOTE: Fresh air can be used in place of zero-grade air. NOTE: The D-Guard² Trend Bar is used to determine when the rate of change of the applied gas has decreased to less than ±... -
Page 22: Manual Span Calibration
D-Guard² Instruction Manual 15.8 Manual Span Calibration Access the calibration menu. See section 15.1. NOTE: The D-Guard² Trend Bar is used to determine when the rate of change of the applied gas has decreased to less than ± 0.1% of full scale per second. Step 1. -
Page 23: System Information
D-Guard² Instruction Manual 16 System Information The system information screens provide information about the hardware and firmware installed in your D-Guard². The sensor information screen contains useful diagnostic information about the installed sensor and its present and previous calibration information. Make sure the menu system is unlocked. See section 14.3. -
Page 24: Status
D-Guard² Instruction Manual 17 Status The status screen gives information on any system status messages generated by the D-Guard². 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. -
Page 25: Sensor Settings
D-Guard² Instruction Manual 18 Sensor Settings The D-Guard² is factory configured when received. Use the Sensor Settings menu to change the user configurable parameters. 18.1 Access the Sensor Settings Menu Make sure the menu system is unlocked. See section 14.3. Step 1. Use to go into the settings menu. -
Page 26: Set Detector Full Scale
D-Guard² Instruction Manual 18.2 Set Detector Full Scale Access the Sensor Settings Menu. See section 18.1. Step 1. Use to go into the full scale menu. Step 2. Use to adjust then to save. NOTE: The full scale reading cannot be greater than the range of the fitted sensor. Step 3. -
Page 27: Set Span Gas Concentration
D-Guard² Instruction Manual 18.3 Set Span Gas Concentration Access the Sensor Settings Menu. See section 18.1. Step 1. Use to exit or to set the span gas. Step 2. Use to adjust then to save. Step 3. Use to return to the settings menu. Step 4. -
Page 28: Set Zero Gas Concentration
D-Guard² Instruction Manual 18.4 Set Zero Gas Concentration Access the Sensor Settings Menu. See section 18.1. Step 1. Use to exit or to set the span gas. Step 2. Use to adjust then to save. Step 3. Use to return to the settings menu. Step 4. -
Page 29: Set Suppression Band
D-Guard² Instruction Manual 18.5 Set Suppression Band The suppression band prevents the D-Guard² 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. -
Page 30: Sensor Gain
D-Guard² Instruction Manual 18.6 Sensor Gain You can select a sensor type from the Sensor Presets menu, see section 21.6, the sensor gain is automatically set. You can adjust the sensor gain to compensate for differences between sensors of the same type or to change the full scale value for a sensor. Access the Sensor Settings Menu. -
Page 31: Alarm Settings
D-Guard² Instruction Manual 19 Alarm Settings You can configure the D-Guard² alarms. The D-Guard² has two alarms: Alarm 1 (AL1) and Alarm 2 (AL2). All alarm settings can be configured independently of each other. CAUTION: The general version of the D-Guard² does not have internal relays. All references to RELAY within the D-Guard²... -
Page 32: Alarm Direction
D-Guard² Instruction Manual 19.2 Alarm Direction Access the Alarm Settings Menu. See section 19.1. NOTE: You can set the alarm direction for each alarm independently. The options are rising or falling. Step 1. Use to exit or to set the alarms. Step 2. -
Page 33: Alarm Level
D-Guard² Instruction Manual 19.3 Alarm Level Access the Alarm Settings Menu. See section 19.1. Step 1. Use to go back or to continue. 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. -
Page 34: Alarm Relay State
CAUTION: The D-Guard² general version does not have internal relays. You must ignore this section. The D-Guard2 Relay and Siren versions have two user configurable relay outputs. You can adjust the initial state of the alarm relays. The options are de-energised or energised. -
Page 35: Alarm Latch
D-Guard² Instruction Manual 19.5 Alarm Latch The D-Guard² alarms can be set as latching alarms (LATCH: ENABLED) or as non-latching alarms (LATCH: DISABLED). Access the Alarm Settings Menu. See section 19.1. Step 1. Use to go back or to continue. Step 2. Use to highlight the latch menu. -
Page 36: Latched Alarm Examples
D-Guard² Instruction Manual 19.6 Latched Alarm Examples CAUTION: You must clear the latched alarm manually. See section 17.1. Figure 21. AL1 Latched. Figure 22. AL2 Latched. Figure 20. AL1 and AL2 Latched. Item Number 201018... -
Page 37: System Settings
D-Guard² Instruction Manual 20 System Settings You can configure the Passcode. You can isolate the D-Guard² if required. 20.1 Access the System Settings Make sure the menu system is unlocked. See section 14.3. Step 1. Use to go into the settings menu. Step 2. -
Page 38: Isolate
D-Guard² Instruction Manual 20.2 Isolate You can isolate the D-Guard² if required. The 4-20mA output will be set to 3.5mA when isolated. Access the System Settings menu. See section 20.1. Step 2. Use then to apply. Step 1. Use to go into the isolate menu. Step 3. -
Page 39: Set Passcode
Step 3. Use to cancel or to apply. Step 4. Use to go back or to continue. CAUTION. If you forget the passcode, you must return the D-Guard² to a Gastech Service Centre. Item Number 201018... -
Page 40: Disable Passcode
Step 3. Use to go into the passcode menu. Step 4. Use to cancel or to apply. CAUTION. If you forget the passcode, you must return the D-Guard² to a Gastech Service Centre. Item Number 201018... -
Page 41: Advanced Settings
D-Guard² Instruction Manual 21 Advanced Settings You can configure the D-Guard² advanced settings. 21.1 Access the Advanced Settings Menu Make sure the menu system is unlocked. See section 14.3. Step 1. Use to go into the settings menu. Step 2. Use then to continue. -
Page 42: System Calibration
D-Guard² Instruction Manual 21.2 System Calibration You can adjust the D-Guard² 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 go into system calibration. Step 3. Use to go into the menu. -
Page 43: 4-20Ma Output Test
D-Guard² Instruction Manual 21.3 4-20mA Output Test You can test the D-Guard² 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 3. Use to go into the system tests. -
Page 44: Relay Function Test
D-Guard² Instruction Manual 21.4 Relay Function Test You can test the D-Guard² 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 tests. Step 3. Use to go into the system tests. Step 4. -
Page 45: Reset Sensor Life
D-Guard² Instruction Manual 21.5 Reset Sensor Life You can reset the D-Guard² estimated life of the fitted sensor. You must reset the Sensor Life setting when a replacement sensor is fitted. Access the Advanced Settings menu. See section 21.1. Step 1. Use to go into the advanced menu. -
Page 46: Sensor Presets
D-Guard² Instruction Manual 21.6 Sensor Presets You can use this menu to load one of the D-Guard² sensor presets. Access the Advanced Settings menu. See section 21.1. Step 1. Use to go into the advanced menu. Step 2. Use to highlight load sensor preset. Step 3. -
Page 47: Error Codes
D-Guard² Instruction Manual 22 Error Codes Use the Status screen, see section 17, to view any active errors. Code Code Description CALIBRATE ZERO CALIBRATE SPAN CALIBRATE 4mA CALIBRATE 20mA ADC OVER RANGE ADC UNDER RANGE SENSOR OVER RANGE SENSOR UNDER RANGE OVER TEMPERATURE UNDER TEMPERATURE SENSOR END OF LIFE... -
Page 48: Specifications
D-Guard² Instruction Manual 24 Specifications Specifications are subject to change without notice. 24.1 Enclosure Specifications Figure 26. D-Guard² dimensions in millimetres (front view). Item Number 201018... - Page 49 D-Guard² Instruction Manual Figure 27. D-Guard² dimensions in millimetres (side view). Item Number 201018...
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Page 50: Mechanical Specifications
D-Guard² Instruction Manual 24.2 Mechanical Specifications Parameter Description Specifications Enclosure material Anti static carbon filled Delrin Enclosure construction Injection molded Enclosure wall section Wall thickness 6.5mm Enclosure IP rating IP66 & IP67/68 Enclosure lid Retainer Not retained Enclosure lid fixing Four screws M5x12 Cable gland M20 Cable Gland IP68 147mm... -
Page 51: General Specifications
D-Guard² Instruction Manual 24.3 General Specifications Parameter Description Limits Measurement technique Electro chemical cell, infra-red Target gas section 24.5 Full scale range section 24.5 Maximum loop current Under any condition 25 mA Minimum supply voltage General, Relay and Siren versions 13 V Maximum loop resistance At a supply voltage of 22 V 380 Ω... -
Page 52: D-Guard² General Versions, Gas, Range, And Resolution
D-Guard² Instruction Manual 24.5 D-Guard² General Versions, Gas, Range, and Resolution Display Lower Gastech Part Number Units Range resolution Detection Limit 65-1080GH-C3H8 C3H8 %LEL 0.05 65-1080GH-CH4-5 %Vol 65-1080GH-CH4-100 %LEL 65-1080GH-CL2 0.05 65-1080GH-CO-100 65-1080GH-CO-500 65-1080GH-CO-1000 1000 65-1080GH-CO2 %Vol 0.01 0.05 65-1080GH-ETO 65-1080GH-H2S-10 0.05... -
Page 53: Warranty
D-Guard² Instruction Manual 25 Warranty Gastech Australia Pty Ltd guarantees that its products, with the exception of sensors, will be devoid of any flaws in material and craftsmanship for a period of two years from the delivery date. 25.1 Sensor Warranty periods... -
Page 54: Replacement Parts
D-Guard² Instruction Manual 26 Replacement Parts You can purchase replacement parts for your D-Guard² from Gastech or its authorised service centres. 26.1 Replacement Parts - exploded view Figure 33. D-Guard² replacement parts - exploded view. Item Number 201018... -
Page 55: Replacement Parts - List
D-Guard² Instruction Manual 26.2 Replacement parts - list Part Number Description 29-1010-01 Decal, D-Guard² 10-1010-06 Socket Head Cap Screw M5x16 21-1080-02 Splash Guard D-Guard² 10-1010-02 Socket Head Cap Screw M5x12 21-1080-03 Lid, Housing, D-Guard² 07-1080-01 Sensor gasket (Not for IR sensors) section 25.1 Sensor 57-0028... -
Page 56: Pcb (Part Number 57-0028) Configuration Jumpers
D-Guard² Instruction Manual 27 PCB (Part number 57-0028) Configuration Jumpers NOTE: The PCB jumpers are factory set for the installed sensor. Jumper Location Jumper Description J302 Two electrode sensors J305 100 Ohm load J307 Non-biased electrochemical sensors Figure 35. PCB 57-0028 jumper locations. Sensor P/N Target Gas J302... -
Page 57: Maintenance
D-Guard² Instruction Manual 28 Maintenance The D-Guard² must be included in your sites regular maintenance program. 28.1 Calibration Interval Make sure the D-Guard² is calibrated regularly. Gastech recommends at least every six months. 28.2 Cleaning Figure 37. Splash Guard. Step 1. Remove the Splash Guard from the D-Guard². -
Page 58: Gastech Policy Statements
Protected through use and/or registration in the United States and many foreign countries are the trademarks and service marks of Gastech Australia Pty Ltd. The use of the ® symbol indicates registration in the United States and the ™ is in Australia;... - Page 59 +61 8 6108 0000 HEAD OFFICE SYDNEY OFFICE BRISBANE OFFICE 24 Baretta Road Suite G01, 10 Tilley Lane PO Box 349 Wangara WA 6065 Frenchs Forest NSW 2086 Cannon Hill QLD 4170 Phone: +61 8 6108 0000 Phone: +61 2 9451 0054...