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Emerson GDU-Incus Quick Start Manual
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Emerson GDU-Incus Quick Start Manual

Emerson GDU-Incus Quick Start Manual

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Quick Start Guide
00825-0100-3003, Rev AA
August 2021
GDU-Incus
Ultrasonic Gas Leak Detector

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Summary of Contents for Emerson GDU-Incus

  • Page 1 Quick Start Guide 00825-0100-3003, Rev AA August 2021 GDU-Incus Ultrasonic Gas Leak Detector...
  • Page 2 WARNING Installing, operating, or maintaining an Emerson product improperly could lead to serious injury or death from explosion or exposure to dangerous substances. Comply with all information on the product, in this manual, and in any local and national codes that apply to the product.

  • Page 3: Table Of Contents

    Emerson be liable for any incidental, punitive, special, or consequential damages including, but not limited to, loss of production, loss of profits, loss or revenue, or use and costs incurred including without limitation for capital, fuel and power, and claims of third parties.
  • Page 4 Quick Start Guide August 2021 Emerson.com...

  • Page 5: Introduction

    Quick Start Guide Introduction Product overview The GDU-Incus is an ultrasonic gas leak detector used for detecting airborne ultrasound generated from pressurized gas leaks. Airborne ultrasound is generated when gas moves from a high pressure area to a low pressure area with a ratio in excess of 1.8 to 1 upstream to downstream.
  • Page 6 Safety Data Sheet (SDS) for each hazardous substance identified must be included with the returned goods. Product recycling/disposal Consider recycling equipment and packaging. Dispose of the product and packaging in accordance with local and national legislations and regulations. Emerson.com...

  • Page 7: Installation

    Ensure that all wiring and power supply to the detector is within specified operating parameters. Except for the terminal cover, the GDU-Incus is a sealed unit. The main enclosure may be opened only by Emerson or Emerson-authorized personnel. All warranties and certifications are nullified if the seals are tampered with or broken.
  • Page 8 Quick Start Guide August 2021 CAUTION Equipment damage Identification tags must be firmly secured to the GDU-Incus bracket to prevent unwanted, locally-generated, ultrasonic noise. Refer to Figure 2-1. Unpack and inspect Procedure 1. Carefully remove all components from the packaging.
  • Page 9 J. Top body enclosure (housing) Installation procedure Emerson recommends mounting the GDU-Incus between 10 and 16 ft. (3 and 5 m) above the floor level to eliminate ground reflections and absorption. You may mount the detector lower than 10 ft. (3 m), but that may reduce the coverage;...
  • Page 10 Quick Start Guide August 2021 the detector range of coverage, contact Emerson or monitor the detector when activated to ensure immunity. 2.4.1 Mechanical installation The detector incorporates a dedicated flameproof terminal compartment certified to Ex d and a flameproof main electronics compartment certified to Ex d, both sealed to IP66/IP67.
  • Page 11 When mounting on a vertical flat surface, such as a wall with no significant vibration, use the standard mounting bracket supplied with the detector. If you suspect vibration at the fixing point, contact an Emerson representative for additional options. Figure 2-3: Wall/Flat Surface Mounting Diagram Dimensions in mm.
  • Page 12 Quick Start Guide August 2021 Note GDU-Incus assembly weight: approximately 40 lb. (18 kg). Ensure fixings are capable of supporting assembly weight and local standards for shock loading. Emerson.com...
  • Page 13 August 2021 Quick Start Guide Figure 2-4: Wall Mounting Drilling Template Quick Start Guide...
  • Page 14 Figure 2-4 shows the position of the mounting slots on the wall mounting bracket supplied with the standard GDU-Incus. Drill pairs of Ø 0.4-in. (10 mm) holes on the mounting surface between 1.2 in. (30 mm) and 2.8 in. (70 mm) apart, with a vertical distance of 7.48 in.
  • Page 15 August 2021 Quick Start Guide Figure 2-5: Pole Mounting Diagram A. See Step B. See Step C. See Step D. Floor E. Vertical mounting locking fastener F. Roof G. Pole mounting adapter Note Specify U-bolt and pole mounting adapter size at time of order. Standard parts are available for tube sizes from Ø...
  • Page 16 C. Floor D. See Step E. See Step F. See Step G. DNV mounting bracket: GDU-02-412 Figure 2-6 shows the mounting arrangement for DNV installation. Torque all bolts to 45 Nm and use spring washers in all cases. Emerson.com...
  • Page 17 August 2021 Quick Start Guide Figure 2-7: DNV Mounting Drilling Template Figure 2-7 shows the position of the mounting slots on the DNV mounting bracket supplied with the DNV detector. Drill pairs of Ø 0.4-in. (10 mm) holes between 2.8 in. (70 mm) and 3.5 in. (90 mm) apart, with a vertical distance of 3 in.
  • Page 18 M6 (0.25-in.) fastener. Ensure earth wire is attached using the supplied spring washer. The standard GDU-Incus is temperature rated between -40 and +185 °F (-40 and +85 °C), and the heated variant is temperature rated between -67 and +185 °F (-55 and +85 °C).
  • Page 19 August 2021 Quick Start Guide 2.6.1 Wire the detector NOTICE Wiring codes and regulations may vary. Wiring must comply with all applicable regulations relating to the installation of electrical equipment in a hazardous area and is the installer's responsibility. If in doubt, consult a qualified official before wiring the system.
  • Page 20 Refer to Figure 2-9 for the flamepath details. Figure 2-9: Flame Path Details A. Terminal cover B. Flame path C. O-ring 2. Seal the terminal compartment with two O-rings to prevent water ingress. Emerson.com...
  • Page 21 August 2021 Quick Start Guide Before closing, Emerson recommends visually inspecting the detector to ensure the O-rings are in place and undamaged. Also check the flame paths of the terminal cover and main enclosure for signs of damage. See Figure 2-9 for O-ring and flame path positions.
  • Page 22 H. Customer cable entry position 2 (not available for FM certified detectors) Figure 2-10 shows a view of the GDU-Incus with the terminal cover removed. For single entry enclosures, enter customer cable via position 1; use positions 1 and 2 for dual entry enclosures.
  • Page 23 Ensure cable entry is via suitable hazardous area approved and ingress protection certified cable glands (customer supplied) or conduit. The ATEX/IECEx approved GDU-Incus has two positions for M20 cable glands, while the FM approved detector has one position for ¾-in. national pipe thread (NPT) conduit.
  • Page 24 Figure 2-11: Electrical Connection Drawing A. Terminal row 1 B. Terminal row 2 Table 2-1: Terminal Row 1 Symbol Description Single cable entry internal earth 24 V return - (0 V) +24v +24 Vdc (15 to 30 Vdc) 4-20 mA output Emerson.com...
  • Page 25 Choose customer cable in accordance with hazardous area certification and applicable local regulations. The GDU-Incus has a temperature rating of 185 °F (85 °C). When used in areas with an ambient temperature above 140 °F (60 °C), ensure cable has a rating that is equal to or exceeds the proposed maximum working temperature.
  • Page 26 Quick Start Guide August 2021 Conductor cross Maximum cable length Maximum cable length sectional area/gauge for standard, non-heated for heated GDU-Incus GDU-Incus 0.5 mm , 20 AWG 1770 ft. (540 m) 240 ft. (75 m) 1.0 mm , 18 AWG 2800 ft.
  • Page 27 2.9.1 Visual inspection Before powering the detector, inspect the following: Refer to Figure 2-13 for key locations on the GDU-Incus when completing this inspection. Figure 2-13: Components of the GDU-Incus A. Display B. Sensor (four positions) C. Sensor pod (four positions) D.
  • Page 28 TREX or AMS, and all relays are energized or de-energized as per defaults. Note If Emerson has set the detector at the factory for specific site requirements, Emerson recommends carrying out the steps in Check sensor functionality before you finish commissioning.

  • Page 29: Operation

    (if no sensors are in fault, the current loop will already be outputting dB level). To avoid false alarms, Emerson recommends setting the alarm level above the background level established by mapping when all processes are operational. If you don't know the background level, Emerson recommends using the detector to analyze the background.
  • Page 30 /TREX/AMS) or at the control panel. Most installations set the alarm levels in the control system. However, please note that the best practice is to have the control panel and the GDU-Incus's internal alarm level to always mirror each other. The reason Emerson.com...
  • Page 31 3.1.2 Delay time To avoid spurious alarms, Emerson recommends using a delay time for non- toxic gas applications or when instantaneous detection is not required. The delay timer is activated from the point at which the alarm threshold is first exceeded.
  • Page 32 Figure 3-2: Graph Showing Alarm Activation with Leak A. Ultrasonic sound level B. Time duration (seconds) C. Delay time (30 seconds) D. Delay reached - alarm E. Delay start point F. Ultrasonic noise level G. Background noise level H. Alarm level Emerson.com...
  • Page 33 August 2021 Quick Start Guide Figure 3-3: Graph Showing No Alarm Activation with Spurious Noise A. Ulstrasonic sound level B. Delay start point C. Noise 1 D. Alarm dB exceeded E. Delay reset F. Delay start point G. Delay reset H.
  • Page 34 It is important to identify all spurious noise spikes of significant duration within the detector coverage. Emerson recommends setting the alarm delay to a value greater than the maximum spurious noise spike operating duration. If two or more spurious noise sources are situated within the detector coverage area, Emerson recommends assessing whether activation Emerson.com...
  • Page 35 The factory alarm delay value is set at 15 seconds. To modify this value, connect to the GDU-Incus with a hand-held TREX device or AMS. Please note when changing the alarm delay that setting values 0 to 99 are in 10 second increments and 100 to 127 are in 1 second increments.
  • Page 36 This enables the detector to be operated as part of a system, as a standalone unit, or hard wire linked to form a sub network. 3.3.1 Relay options The GDU-Incus has two relays configured as follows for the standard factory default: Table 3-2: Relay Defaults Relay...
  • Page 37 August 2021 Quick Start Guide Display The GDU-Incus incorporates a five-digit segment, 0.31-in. high x 0.16-in. wide (8 mm high x 4 mm wide) character light-emitting diode (LED) display with red numerals as standard. During operation, the real-time dB level is continuously shown while below the programmed alarm level and flashing when above the programmed alarm level.
  • Page 38 E. 0 percent of range F. 2.0 mA sensor head test fault G. 1.0 mA internal process fault H. 0.5 mA all sensor heads failed The GDU-Incus is providing coverage when the 2.0 mA sensor test fault is active. Emerson.com...
  • Page 39 Continuous 0.5 mA (±0.2 mA) output, indicating that all four sensors have failed self-test. Firmware version 3.4 onwards. Recommended action Contact your Emerson representative. 3.6.4 Zero mA major fault Zero (0) mA output is either caused by a total loss of power to the detector or a serious microprocessor fault.
  • Page 40 Quick Start Guide August 2021 Potential cause Loss of power. Recommended action Apply power to the detector. Potential cause Serious microprocessor fault. Recommended action Contact your Emerson representative. Emerson.com...

  • Page 41: Hart ® Functionality

    A device driver (DD) file for Emerson AMS and the hand-held TREX field terminals is available from Emerson. In addition, you can use the detector with FDT frame applications using a generic DTM with limited functionality.

  • Page 42: Product Certifications

    Class 1, Div 1, Groups B,C, and D, T4 AEx d ib Class 1, Zone 1, Group IIB+H2, T4 Type 4X -40 °F (-40 °C) to 185 °F (85 °C) Canada Explosionproof with Intrinsically Safe sensors Flameproof with Intrinsically Safe sensors Certificate 3043275C Emerson.com...
  • Page 43 August 2021 Quick Start Guide Standards FM Class 3600: 2011, FM Class 3610: 2010, FM Class 3615: 2006, FM Class 3810: 2005, ANSI/NEMA 250: 1991, ANSI/ISA 60079-0: 2009, ANSI/ISA 60079-1: 2009, ANSI/ISA 60079-11: 2011 Markings Class 1, Div 1, Groups B,C, and D, T4 Ex d ib Class 1, Zone 1, Group IIB+H2, T4 Type 4X -40 °F (-40 °C) to 185 °F (85 °C)
  • Page 44 3. Minimum fastener yield stress required ≥ 450 Moa (property class A4-70). 4. Suitably approved cable glands only to be used. -67 °F (-55 °C) when fitted with heating device. -40 °F (-40 °C) when no heating device is fitted. Emerson.com...
  • Page 45 August 2021 Quick Start Guide 5. Any unused entries must be blanked using suitably approved blanking plugs. 6. As flameproof joint lengths exceed the relevant minimum dimensions given in ABNT NBR IEC 60079-1: 2009, information on the dimensions of the flameproof joints shall be obtained from the listed certified schedule drawings;...
  • Page 46 Quick Start Guide August 2021 5.10 Declaration of Conformity Emerson.com...
  • Page 47 August 2021 Quick Start Guide Quick Start Guide...
  • Page 48 Quick Start Guide August 2021 5.11 China RoHS tables Emerson.com...
  • Page 49 August 2021 Quick Start Guide Quick Start Guide...
  • Page 50 Quick Start Guide August 2021 Emerson.com...
  • Page 51 August 2021 Quick Start Guide Quick Start Guide...
  • Page 52 For more information: www.emerson.com © 2021 Emerson. All rights reserved. Emerson Terms and Conditions of Sale are available upon request. The Emerson logo is a trademark and service mark of Emerson Electric Co. Rosemount is a mark of one of the Emerson family of companies.