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GDS GasVac LG-1 Operating Handbook

Land gas monitor
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T E C H N O L O G I E S
C1780
Manual No. 351DIC
Issue Av2
GasVac LG-1
LAND GAS MONITOR
OPERATING HANDBOOK
This document is not contractual and the equipment specification may be modified at any time without prior notice.
E:
sales@gds-technologies.co.uk
T:
0113 286 0166
F:
0113 287 8178
www.gds-technologies.co.uk
GDS TECHNOLOGIES LTD
|
FUSION POINT
|
ASH LANE
|
GARFORTH
|
LEEDS
|
LS25 2GA
|
UK

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  • Page 1 T E C H N O L O G I E S C1780 Manual No. 351DIC Issue Av2 GasVac LG-1 LAND GAS MONITOR OPERATING HANDBOOK This document is not contractual and the equipment specification may be modified at any time without prior notice.

  • Page 2: Table Of Contents

    MODBUS SET UP AND INDICATORS ............................10 REPEATER ....................................11 RS232 DATA LOG OUTPUT ..............................11 EVENT LOG .....................................12 DATA TO AND FROM A PC USING GDS TERMINAL ........................12 SETTING THE TIME TO ALARM ..............................14 SETTING ALARM LEVELS ................................14 ALARM RELAY OFF TIMERS ...............................15 VOTING RELAYS ..................................15...

  • Page 3: System Overview

    SYSTEM OVERVIEW The Land Gas Monitor is designed to be used in a safe area, external to the area being monitored for potential hazardous conditions, measure up to 8 different gases whilst checking for alarm conditions. A vacuum pump draws the gas to the sensors on a continual basis resulting in gas readouts being displayed on the screen, the pump system also incorporates a pump fail and line blockage monitor.

  • Page 4: General Specification

    GENERAL SPECIFICATION 1 - 8 Sensor inputs (CAN network – 4 wire) Addressable Sensors end of line termination required. 1.7W per sensor Measurements Combustible gas - LEL % vol. Toxic gas - ppm % vol. Oxygen - % vol. Electrochemical - Infra Red - Pellister Sensor Types Sensor Cable Addressable CAN bus,...

  • Page 5: Led And Lcd Indicators

    Alarms = 0 Faults = 0 Sensors D = 4 A = 6 12.24 Tue 31 Jul 2012 GDS Technologies Ltd 0113 2860166 Company Text Alternating user text display (programmable) Line 1 Addressable sensor, values and gas type and location...

  • Page 6: Push Buttons

    PUSH BUTTONS 7 user buttons are provided on the front to allow control and setting up of the system plus there is an internal PCB button. These buttons are also numbered and shown in brackets e.g. button 3 is (3). Button 1 is the Accept/Mute and UP button.

  • Page 7: Entering A Password To Get To User Or Engineer's Menus

    ENTERING A PASSWORD TO GET TO USER OR ENGINEER’S MENUS To protect system parameters from being altered by unauthorised people. Two passwords have to be entered to gain access to available menus which allow changes to be made. The first 4 button password is the USER menu and gives access to a limited set of menus, e.g. clock set, LED test etc.

  • Page 8: Holding The Display

    HOLDING THE DISPLAY As the display cycles through the active sensors sequentially, it may be required to stop on a particular channel for maintenance. This can be achieved using the + (4) button on the front panel which when pressed will hold the current sample for 999 seconds.

  • Page 9: Gas Type Library

    GAS TYPE LIBRARY Oxygen 0-25% two falling alarms Carbon Dioxide 1000ppm CO2b Carbon Dioxide 0-30%V CO2a Carbon Dioxide 0-2%V Hydrogen Sulphide 0-50ppm Carbon Monoxide 0-250ppm Sulphur Dioxide 0-10ppm Nitrous Oxide 0-100ppm Nitrogen Dioxide 0-10ppm Chlorine 0-10ppm Hydrogen 0-1000ppm Hydrogen Cyanide 0-25ppm Hydrogen Chloride 0-10ppm Ammonia 0-100ppm Ozone 0-2ppm...

  • Page 10: Dimming The Led's

    DIMMING THE LED’S (11) The LED’s on the main processor board and the LCD display are normally bright but can be dimmed to give a more acceptable level of illumination in subdued control room conditions. The DIM (6) button on the main panel when pressed will toggle the brightness between maximum and dimmed for both.

  • Page 11: Modbus Set Up And Indicators

    MODBUS SET UP AND INDICATORS Modbus is a means of obtaining data from the gas detection system via a MODBUS master controller. The system is a SLAVE to the commands received from the master via two RS485 twisted pair communication cables. When a command is received on one of these cables, the reply is sent on the same cable thus giving rise to half duplex communication.

  • Page 12: Repeater

    REPEATER It may be required to have a duplicate console sited elsewhere, such as a control room or instrument room. Using the CAN network, 4 core (2 data + 2 supply) cable, a repeater can be connected which gives a user interface identical to the main panel. In fact the data displayed on the repeater board is transmitted from the main panel.

  • Page 13: Event Log

    Whilst these parameters can be set manually using the buttons, it is quicker and easier to send a text data file from a PC using the RS232 interface via GDS Terminal which can be downloaded from the GDS website.
  • Page 14 When prompted, choose your modified text file as the one to send and then the text should start to flow. The output seen on the GDS Terminal screen consists of the command letters received so strings of T or H, etc are seen which lets you know that all is well. The final letter seen will be an X...

  • Page 15: Setting The Time To Alarm

    Addressable gas sensors Use ENGINEER’S menu 10 (addressable zero span) to calibrate the addressable sensors. The inhibit LED on all connected sensors will flash. Use the UP (1) and DOWN (5) buttons to look at all sensor addresses which are being zeroed and use the + (4) or – (2) buttons to zero the reading on each sensor.

  • Page 16: Alarm Relay Off Timers

    ALARM RELAY OFF TIMERS The 8 relays on the PCB are allowed to take time to de-energise. For example, this delay could be used to keep fans running for a longer period after the gas alarm to allow a larger area to be vented.

  • Page 17: Time Weighted Alarms

    TIME WEIGHTED ALARMS (NOTE: THIS APPLIES TO OPT5,6,7,8 RELAYS) Two types of time weighted alarms can be set using menu 31. STEL is a short time exposure level which is a weighted average of gas level for the last 15 minutes. It is associated with one of the four groups (5,6,7,8) of sensors.

  • Page 18: Installation

    INSTALLATION The enclosure should be securely mounted to a substantial wall at chest height using the brackets provided, its position should be such as to provide a clear field of vision of any alarm indications. To position the enclosure a supporting tressel of the required height should be positioned to enable two men to lift the enclosure on to the tressel following which the enclosure mounting brackets should be located and attached to the enclosure and wall by either large screws or expansion bolts.

  • Page 19: Service - Routine Attention

    SERVICE – ROUTINE ATTENTION The owner or occupier of the site should place the supervision of the system in the charge of a responsible executive, whose duty it should be to ensure the day to day operation of the system and to lay down the procedure for dealing with a gas alarm or fault warning.

  • Page 20: Menu Functions By Number

    MENU FUNCTIONS BY NUMBER 1] View Modbus Reg This allows inspection of the 250 internal Modbus registers. Use UP (1) and DOWN (5) buttons to alter the register which is displayed in Decimal and Hexadecimal. SELECT (3) button will exit. 2] Set Clock Using UP (1) / DOWN (5) and SELECT (3) allows the date and time to be changed.
  • Page 21 Addressable Zero and Span The first part of this menu allows you to zero an addressable CAN channel. The channel is selected by using UP (1) and DOWN (5) buttons and the reading itself is adjusted by pressing + (4) and – (2). This menu will timeout and the number of seconds left is displayed on the LCD.
  • Page 22 View Addressable Sensor Data This menu allows the veiwing of data received from an indivdual CAN sensor for upto 24 hours. Use the UP (1) and DOWN (5) buttons to choose the sensor channel to be displayed. The data displayed is as follows: Addr 00 Timeout in 00sec Lowest=00...
  • Page 23 Seconds to Alarm When an alarm condition exists it is possible to delay the response and if the alarm still exists at the end of this delay then a normal alarm condition is recognised. This menu allows you to set this delay to a maximum of 255 seconds.
  • Page 24 LTEL, STEL Alarms This menu allows you to set the time weighted average alarms for groups 5, 6, 7 and 8. Default Sections Sometimes it is required to default part of the data in the panel and this menu allows you to do this. (Some options are repeats of other menus) Pressing SELECT (3) moves to the next option and pressing + (4) defaults the option displayed.
  • Page 25 APPENDIX 1 Below is an example of a typical text file that can be sent to/from the system. PLEASE NOTE: 1) ‘ : ‘ = Direct Sensor, ‘ * ” = Addressable Sensor 2) Lines of the same command but different addresses have been deleted 3) The difference between patterns and groups is that there are 16 patterns, and 8 groups.
  • Page 26 Text File Command (Summarised) Description Addres Chan 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 See above – but for addressable sensors 33-48 *Fault 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, *first alrm 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, *second alrm 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, *third alrm 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,...
  • Page 27 APPENDIX 2 Modbus Register Specification for 16 channel +CAN system Function code 03 used througout to access these 16 bit unsigned registers Baud rate 4800,9600,19200 No parity 1 stop bits 2 channel known as Duty and standby (RS485) Register definition Data Units watchdog counting...
  • Page 28 The 9 Way D-type plugs into the PC com port and the pre-wired sensor connector is inserted into J3 on the Flam PCB (198 Issue P) and J3 on the Tox PCB (204 Issue N). When GDS Terminal on the...
  • Page 29 Front Panel PCB...

  • Page 30: Xdi-Xdiwin - 15/30J

    PC or laptop (dedicated) sensor head. Pressing (R) on the PC causes a reset to occur. Hyperterminal (download from GDS website) Gas type with address and serial number are then output to the PC together with alarms and calibration date.
  • Page 31 T E C H N O L O G I E S Technical Sheet ref C1698 Issue Bv.3 End-of-line Jumper Using magnets (set up) FIELD TERMINALS The Combi sensors which have an LCD display fitted also Removing both magnets as instructed on the LCD presents the 4-20mA Test Jumper incorporate 3 reed switches which can be activated using external...

  • Page 32: Xdi-Xdiwin - 15/30J

    Press ‘A’ to change the address of this sensor if required PC or laptop (dedicated) d. Press ‘N’ to select the number of decimal places to 1 or Hyperterminal (download from GDS website) 2, (ie: dp=1 or dp=2) Set up procedure: e.
  • Page 33 End-of-line Jumper FIELD TERMINALS 4-20mA Test Jumper T E C H N O L O G I E S 24V Can+ Can- OV 4-20mA Addressable 4-20op Test Points Sensor Control Unit Technical Sheet 4-20 ref C894 Using magnets (set up) OV 4-20 4-20mA SInk/Source The Combi sensors which have an LCD display fitted also...

  • Page 34: Cv Transmitter

    BOARD JP1 Jumpers AD 2 Wire No C Nc Output Signal no 4~20mA Adjust signal Alarm Field Terminals to ON/Zero GDS alarm unit D C B A ZERO JP1 Jumpers DB Sensor Relay 3 Wire 20mA Volts Sink Relay Sensor...

  • Page 35: Can Relay Unit

    CAN RELAY UNIT 8 WAY REMOTE CAN RELAY T E C H N O L O G I E S Technical Sheet ref C1625 Issue A v.1 Relays: x8 - volt free - SPCO 3A/230vAC Input Terminals: Alarm / Fault - CANbus Terminals to Combi short to 0v Output Terminals:...

  • Page 36: Sensor Aspirator Module

    SENSOR ASPIRATOR MODULE T E C H N O L O G I E S TYPE ASM-2 P UM P/F LO W MON ITOR Input 24v DC ±20% 170mA Dimensions 123L 54W 80H Flow Rate 2.5 litres/min Weight 320 gms Continuous Pump Motor - 6 years expected Mounting/Position...

  • Page 37: System Components

    SYSTEM COMPONENTS Please see parts/picking list 008-100 on the next page 20JP1- Redline Prime 1 IR Flam (Flam (% Vol) 14 5A Power Supply Din Rail 20JP1-Redline Prime 3 IR CO2 (CO2 % Vol) 18 0-2.5 L/min Flow Gouge 20JP1-CA Flow-Oxygen 19 Flow Regulator Cab Gas Monitor (Flam) 22 Toggle Switch...

  • Page 38: Picking List

    PICKING LIST Picking List No: 008-100 C785 PICKED LINE NO DESCRIPTION PART NO BIN NO LOCATION (√) 20JP1-Redline Prime 1 IR Flam (Flam (% Vol) 112-001 20JP1-Redline Prime 3 IR CO2 (CO2 % Vol) 112-003 20JP1-CA Flow-Oxygen 112-419 Cab Gas Monitor (Flam) 111-179 P1 Flow Block O Rings (P1)

  • Page 39: Sample Flow Path

    LAND GAS MONITOR sample flow path pressure system...
  • Page 44 CONTACT GDS Technologies can be contacted in the following ways: Web: www.gds-technologies.co.uk Email: sales@gds-technologies.co.uk Phone: +44(0)113 286 0166 This document is not contractual and the equipment specification may be modified at any time without prior notice. sales@gds-technologies.co.uk 0113 286 0166 0113 287 8178 www.gds-technologies.co.uk...

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