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STATUS SCIENTIFIC CONTROLS FGD10A-M Installation, Commissioning & Routine Gas Testing Manual

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STATUS SCIENTIFIC CONTROLS
Issue:
10
Date:
21/1/19
Firmware:
V2.1.0
Installation, Commissioning &
Routine Gas Testing Manual
Gas Detector
Type FGD10A-M

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Summary of Contents for STATUS SCIENTIFIC CONTROLS FGD10A-M

  • Page 1 STATUS SCIENTIFIC CONTROLS Issue: Date: 21/1/19 Firmware: V2.1.0 Installation, Commissioning & Routine Gas Testing Manual Gas Detector Type FGD10A-M...
  • Page 2 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector...
  • Page 3 Description of Equipment: The FGD10A-M Series of Fixed Gas Detectors for the detection of Oxygen, Toxic or Flammable gases. ATEX Flameproof Certified for use in Group IIC hazardous locations. Directive 2014/34/EU ATEX The following harmonised standards were used in support of this declaration: EN 60079-0:2012+A11:2013 Explosive atmospheres Part 0: Equipment –...
  • Page 4 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector...

  • Page 5: Table Of Contents

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector CONTENTS FIRMWARE REVISION ................... 6 PACKAGE CONTENTS .................. 7 SCOPE OF THE MANUAL ................7 DESCRIPTION ....................8 4.1....................10 ELAYS INSTALLATION .................... 11 5.1..................12 ABLE ENTRIES 5.2.
  • Page 6 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.16. Warm-up timer ....................51 9.1.17. Zero Suppression .................... 52 9.1.18. Sensor Type ....................53 9.1.19. Sensor Bias (Toxic sensor only) ..............56 9.1.20. Gain Setting (Toxic Sensor only) ..............56 9.1.21.

  • Page 7: Firmware Revision

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector IRMWARE EVISION V2.1.0 29/04/14 New features and bug fixes. Bug fix for Hydrogen (Toxic) in Gain Set Menu. SSCL (only) factory setup menu. RTC calibration in TIME menu. Extra diagnostic menu and diagnostic functions Fix for diagnostics –Oxygen-display span data.

  • Page 8: Package Contents

    Calibration certificate Optional:- Weather guard COPE OF THE MANUAL This manual relates to versions of the FGD10A-M gas detector with one of the following sensor types:- • An Infrared sensor for the detection of Hydrocarbon (HC) or CO2 gases •...

  • Page 9: Description

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector ESCRIPTION FGD10A-M GAS DETECTOR FGD10A-M GAS DETECTOR FITTED WITH PROTECTIVE WEATHERGUARD TD18/032 Issue: Change Note: 1869 Page 8...
  • Page 10 Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector The FGD10A-M is an explosion protected ATEX and IECEx certified fixed gas detector for use in potentially explosive atmospheres. The unit may be optionally fitted with a protective weather guard as shown in the photograph.

  • Page 11: Relays

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 4.1. Relays The FGD10A-M relay version has 3 factory-fitted relays. Each provides a set of voltage free changeover contacts to perform the following control functions:- • Alarm Level 1 •...

  • Page 12: Installation

    In order to prevent dangerous overloading of the FGD10A-M gas detector, it is important that the installer observes the relay contact rating and ensures that external circuits connected to the relay contacts are suitably protected from exceeding that rating and associated cabling is adequately rated and suitably installed.

  • Page 13: Cable Entries

    The FGD10A-M should be mounted and secured using the mounting holes on the main unit. Figures 2 and 3 shows details of the FGD10A-M terminal connections – these can be accessed as follows:-. Switch OFF the supply to the FGD10A-M.
  • Page 14 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Figure 1 – Unplugging the display board for connection purposes TD18/032 Issue: Change Note: 1869 Page 13...

  • Page 15: Fgd10A-Mconnections

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 5.3. FGD10A-M connections ATEX certified Ex d armoured Armoured cable Armoured cable cable glands RS485 Aout Important Relay 3 Relay 2 Relay 1 Fault Alarm 2 Alarm 1...

  • Page 16: Power Supply

    FGD10A-M Gas Detector 5.4. Power Supply The FGD10A-M is powered from a 8 – 24 volt dc, 5 W maximum output supply. This may be either:- An independent supply powering one or more units. A supply that is an integral part of a control card within a monitoring panel.

  • Page 17: Commissioning

    Once the installation is complete and the covers are secure then power can be applied. The power source should be between 8 and 24 volts dc. When power is first applied to the FGD10A-M, an initialisation procedure is performed as follows: FGD10A V1.1.1...

  • Page 18: Screen Saver

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 6.2. Screen Saver The OLED display can shown signs of display retention when areas of the screen are constantly illuminated. These effects reveal them selves when the background is a colour other than black.

  • Page 19: Indicators

    The FGD10A-M can be calibrated using a test gas for any of the gases shown in Figure 5, using the span setting procedure as described in Section 9.1.3.
  • Page 20 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector TD18/032 Issue: Change Note: 1869 Page 19...

  • Page 21: Initial Gas Testing

    Section 9.1.2. - Sensor Zero. If the analogue signal is connected to an associated control panel, confirm that when the FGD10A-M display reads zero, the control panel display also reads zero or, adjust as necessary in accordance with the control panel manufacturers’...
  • Page 22 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Figure 6 – Arrangement for Application of a Certified Test Gas Without weatherguard With weatherguard Calibration Metal sampling adaptor, Stock No. SS336 Adaptor 6mm O.D. Sampling Tube Remote...

  • Page 23: Test Gas

    If the instrument reads correctly then no adjustment is required. If the analogue signal is connected to an associated control panel, confirm that the reading corresponds with that on the FGD10A-M or adjust as necessary in accordance with the control panel manufacturer’s instructions.

  • Page 24: Sampling Time

    FGD10A-M Gas Detector Where a weather guard is not fitted, the use of a sampling adaptor (Stock No. SS336) is required in order to present the gas to the FGD10A-M sensor. 8.2.2. Sampling time Apply the test gas and allow a sufficient time for the sample to reach the gas detector.

  • Page 25: Software Features

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector OFTWARE EATURES The menu system featured within the FGD10A-M allows all calibration and configuration activities to be performed. Key press indicator POWER Methane %LEL ENTER MENU Gas Detector...
  • Page 26 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Note: It is important that that the FGD10A-M is correctly configured for the sensor in use, prior to performing any feature available in the menu system. TD18/032 Issue:...

  • Page 27: Menu Selection

    FGD10A-M Gas Detector 9.1. Menu Selection The FGD10A-M uses a password system to restrict the end user from carrying out certain changes that may compromise the use of the equipment. Setting the password to OFF will give the user access without compromise.
  • Page 28 Via password 1 Only SSCL √ Default.LEL & CF Via password 2 Only SSCL Note: The password 2 is only for Status Scientific Controls Ltd personnel. √ Key: Menu option available. Menu option not displayed in this context. Infrared Premier IR sensor V7 firmware and above.

  • Page 29: Sensor Zero

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.2. Sensor Zero • From the menu system select menu option: Sensor Zero press ENTER. Calibration Zero Sensor • Ensure the sensor is in a zero-gas environment. Note: 1.

  • Page 30: Sensor Span

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.3. Sensor Span The following description applies to Pellistor, Toxic, Oxygen, IR Methane and IR propane gases. For other IR flammable gases e.g. propylene, see below. Always zero the sensor prior to performing a span operation, even if the display shows zero.
  • Page 31 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector TD18/032 Issue: Change Note: 1869 Page 30...
  • Page 32 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector For gases on the “Flammable” menu other than methane, the Span operation must be carried out with propane. • Apply a known concentration of Propane e.g. 55% LEL at a flow rate of between 500 and 1000cc/min.

  • Page 33: Sensor Fsd

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector • to exit Press Menu Flammable %LEL Propane 22/05/2013 15:33:26 9.1.4. Sensor FSD Sensor FSD Edit The sensor measuring range is set by this menu. • Use the...

  • Page 34: Ma Current Loop

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 4 – 20 mA Current Loop 9.1.5. The analogue output is that of a current source. In order to calibrate the output it is necessary to monitor the output signal. This can be performed as...

  • Page 35: Alarm Levels

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.6. Alarm Levels Alarm level 1 is associated with Relay 1, setting between 1 and 100% FSD Alarm level 2 is associated with Relay 2, setting between 1 and 100% FSD Alarm level 3 is associated with Relay 3, setting between -1 and -10% FSD •...

  • Page 36: Firmware Version

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.7. Firmware Version • From the menu system select menu option: and press Version ENTER. If a Premier IR sensor is fitted, both the FGD10AM firmware version is displayed and the Premier IR sensor version is...

  • Page 37: Relays

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.8. Relays Relay 1 is associated with Alarm level 1 Relay 2 is associated with Alarm level 2 Relay 3 is associated with Alarm level 3 The user can select if the relay is normally Energized, E’ or normally de- energised, ‘d’...

  • Page 38: Latching Relays

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.9. Relays Latching The user can select if the relays are latched or non-latched. If the relays are latched then they can only be cleared when the alarm condition no longer exists and the ENTER button has been pressed during the normal screen.

  • Page 39: Password Enable

    Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.10. Password Enable Use this menu option to enable / disable the password feature. Place the FGD10A-M in the password menu as follows: • Press the MENU to open the menu system. •...

  • Page 40: Set Password

    Use this menu option to set the user password. The password can only be digits 1, 2 or 3, with a maximum of 6 digits. Place the FGD10A-M in the password menu as follows: • Press the MENU to open the menu system.
  • Page 41 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector TD18/032 Issue: Change Note: 1869 Page 40...

  • Page 42: Diagnostics

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.12. Diagnostics This feature is a view-only feature. No configuration changes are possible from within this menu. • From the menu system select menu option: Diagnostics press ENTER.
  • Page 43 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Diagnostics 1 Reading2: Reading3: Status1: 0000 Status2: 0000 0000 Status3: Exit Reading2 is the computed gas reading for channel 2 e.g. CO2 for dual sensor. Reading3 is the computed gas reading for channel 3 e.g. Propane Status 1,2 and 3 are the status bits as defined in TDS0045 “Premier...
  • Page 44 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Sensor Span is the calculated span factor for the sensor. TD18/032 Issue: Change Note: 1869 Page 43...
  • Page 45 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.12.2 ConfigData: The parameters displayed via ‘cycling pages‘ are as follows for IR sensors only: The ConfigData option will be “greyed out” for non IR sensors and if thus selected, the message “ConfigData is for Infra Red Sensors only!”...
  • Page 46 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector TD18/032 Issue: Change Note: 1869 Page 45...
  • Page 47 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.12.4 Display LEL and CF This is selectable via Diagnostics 2 screen and applies to IR flammable sensors only. Diagnostics 2 Select: Display LEL and CF Test Relays...
  • Page 48 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.12.6 Modbus Data This is useful for diagnosing the Modbus communications problems by displaying some bus data in real time. The displayed parameters are as follows for received data only by the FGD10AM from the Modbus master controller.

  • Page 49: Hysteresis

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.13. Hysteresis This option sets the alarm hysteresis. The relays will chatter if this level is set to 0. The usual setting is 10%. • From the menu system select menu option: Hysteresis press ENTER.

  • Page 50: Display Resolution

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.14. Display Resolution The number of decimal places that are used to display the detected gas levels can be changed via this menu option. • From the menu system select menu option:...

  • Page 51: Restore

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.15. Restore • From the menu system select menu option: Display and press ENTER. Factory Restore Infrared Edit • Using the buttons to select the desired sensor type, see list below.

  • Page 52: Warm-Up Timer

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.16. Warm-up timer The sensor goes through a stabilisation period when power is first applied. This option allows the user to adjust the time that is applied before readings are displayed / transmitted.

  • Page 53: Zero Suppression

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.17. Zero Suppression The zero of the sensor may drift from time to time and as such it may be desirable to suppress small fluctuations. These menu options allow the user to hide these small variations on the display.

  • Page 54: Sensor Type

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.18. Sensor Type This menu is used to display the type of gas measured by the sensor. • From the menu system select menu option: Sensor Type press ENTER. The following screen will be displayed:...
  • Page 55 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector If Flammable option (Infrared sensor V7 and above firmware only) is selected, Sensor Type Flammable Edit selection from a further list is possible as follows: Flammable gas type:...
  • Page 56 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Set Default LEL and correction factors TD18/032 Issue: Change Note: 1869 Page 55...

  • Page 57: Sensor Bias (Toxic Sensor Only)

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.19. Sensor Bias (Toxic sensor only) SET BIAS Bias=0mv Edit Use the buttons select the desired bias. This option sets the bias voltage to match the sensor fitted. Available options are: no bias, 250 mV and 300 mV bias The normal level is 0, no bias.

  • Page 58: Sensor Units

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.21. Sensor Units This menu is used to display the units of parameter measured by the sensor. • From the menu system select menu option: Sensor Units press ENTER. The following screen will be displayed:...

  • Page 59: Time

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.22. Time This menu is used to display the data and time. • From the menu system select menu option: and press Time ENTER. The following screen will be displayed:...

  • Page 60: Screen Saver

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.23. Screen Saver The screen saver has two parameters, Enabled and Time. The Enabled setting can be either Yes or No, selecting No disables the screen saver function.

  • Page 61: Set Flammable Gas Type

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.24. Set Flammable Gas Type Note: This menu is only accessible if an IR sensor is fitted and “Flammable” is selected from the Sensor Type menu. See menu description “Set Sensor Type”.

  • Page 62: Set Flammable Gas Lel. (Infrared Sensor Only)

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.25. Set Flammable Gas LEL. (Infrared sensor only) This option allows the LEL for any of the flammable gases on the list to altered. NOTE: With the exception of methane, flammable gas readings are computed with respect to the Propane IR channel.

  • Page 63: Set Flammable Gas Correction Factor

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.26. Set Flammable Gas Correction Factor NOTE: This option is for use by SSCL only and is password protected. It is used to set the Flammable gas reading, corrected for Propane, when using a propane sensor.

  • Page 64: Set Flammable Gas Default Lel And Correction Factor

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 9.1.27. Set Flammable Gas Default LEL and Correction Factor NOTE: This option is for use by SSCL only and is password protected. This option restores the factory-set default LEL and propane correction factors for all gases on the Flammable list.

  • Page 65: Modbus Interface

    FGD10A-M Gas Detector MODBUS INTERFACE The FGD10A-M is supplied with an RS485 interface which provides control of the FGD10A instrument via the Modbus RTU protocol. Remote calibration and setup are possible as well as remote monitoring of the gas level and all the other operational parameters of the FGD10A.

  • Page 66: Modbus Register List

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Typical Network operating parameters Slave response timeout 2000 (ms) Turnaround delay 2000 (ms) Message to message delay 10 (ms) Number of retries 10.2. Modbus Register list. Note:16 bit hexadecimal notation is represented by: 0x000A =10 decimal...
  • Page 67 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector LOGICAL (R/W) DATA DESCRIPTION ADDRESS TYPE 40003 uINT16 TEMPERATURE of sensor (IR only) in Kelvin(e.g. 303) Sensor “Restore” Type: 40009 uINT16 1=IR 2=Pellistor 3=Oxygen 4=Tox1 5= Tox2 6= Tox3...
  • Page 68 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Ozone = 0x23 Pentane = 0x16 “Flammable” Phosphene = 0x24 Propane = 0x16 “Flammable” Sulphur Dioxide = 0x03 Toluene = 0x16 “Flammable” VOC = 0x25 default =0xff 40106...
  • Page 69 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector LOGICAL (R/W) DATA DESCRIPTION ADDRESS TYPE 40115 uINT16 Last Alarm date (mmdd) MSB=month (0x01 to 0x0C) LSB=day (0x01 to 0x1F) returns zero if no alarm has ever occurred.
  • Page 70 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector TD18/032 Issue: Change Note: 1869 Page 69...
  • Page 71 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector LOGICAL (R/W) DATA DESCRIPTION ADDRESS TYPE 40213 uINT16 RELAY MODE Bit assignments: REL3 REL2 REL1 XXXX XX00 XX00 XX00 (X=don't care) bit 1 and 0 assignments: 00 E:R energised rising...
  • Page 72 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector LOGICAL (R/W) DATA DESCRIPTION ADDRESS TYPE 40235 MSFP16 Hysteresis Value Float Most significant 16 bits of IEEE574 floating point value. 40236 LSFP16 Hysteresis Value Float Least significant 16 bits of IEEE574 floating point value.
  • Page 73 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector LOGICAL (R/W) DATA DESCRIPTION ADDRESS TYPE 40306 uINT16 Alarm1 Seconds The second the most recent alarm1 occurred e.g. 0x002F= 47 40307 uINT16 Alarm2 Year The year the most recent alarm1 occurred e.g.
  • Page 74 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector LOGICAL (R/W) DATA DESCRIPTION ADDRESS TYPE 40319 uINT16 Zero Year The year the instrument was last zeroed e.g. 0x000D= 2013 40320 uINT16 Zero Month The month the instrument was last zeroed e.g.

  • Page 75: Modbus Programming Examples

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector LOGICAL (R/W) DATA DESCRIPTION ADDRESS TYPE 40351 uINT16 Set Latched Relays 0x0000 = NO latched alarm function 0x0001 = latched alarm ACTIVE Note: If Set Latched Relays is disabled during a Latched Alarm condition, the Latched Alarm must still be reset via register 40350 10.3.
  • Page 76 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 40102 in the Modbus register map. In other words Logical address 40001 in the Modbus memory map equates to holding register physical address 0. D0 is the PLC register assigned to hold the gas level reading = 50 (%LEL) The ADPRW command automatically takes care of CRC generation and checking.

  • Page 77: Example 2: Method For Recalculating Crc Checksum

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 10.3.2. Example 2: Method for recalculating CRC checksum: The following code is used by the FGD10AM to check the incoming message CRC. The incoming message was stored in an array called...

  • Page 78: Example 3: Received Modbus Frame From Fgd10Am

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector An identical method was used to generate the CRC for transmitted messages. 10.3.3. Example 3: Received Modbus frame from FGD10AM An typical response packet received from the FGD10AM to the command...

  • Page 79: Broadcast Messages

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 10.4. Broadcast Messages. The FGD10AM will accept broadcast messages (node address 0) for the “Write Single Register” (06H) command only. This is useful for example, in setting the real time clock for all devices on the network, or resetting all Latched Alarms.

  • Page 80: Routine Gas Testing

    Refer to Figure 6 in section 8. showing the arrangement for applying the test gas to the FGD10A-M. Before application of the test gas, check that the FGD10A-M reads zero with no known gas present in the atmosphere. If necessary, carry out adjustment of the zero setting as described in section 9.1.2.

  • Page 81: Sensor Replacement

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector SENSOR REPLACEMENT 12.1. Infrared sensor Step1 Remove the grub screw in an anti-clockwise direction. TD18/032 Issue: Change Note: 1869 Page 80...
  • Page 82 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step2 Turn cover securing stud anti-clockwise to allow cover to open. TD18/032 Issue: Change Note: 1869 Page 81...
  • Page 83 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 3 Remove the sensor by pulling downwards TD18/032 Issue: Change Note: 1869 Page 82...
  • Page 84 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 4 Carefully locate the pins in the sockets then push the new sensor upwards. TD18/032 Issue: Change Note: 1869 Page 83...
  • Page 85 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 5 Replace the sensor housing by rotating in a clockwise direction untill fully tightened. TD18/032 Issue: Change Note: 1869 Page 84...
  • Page 86 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 6 Rotate the grub screw in a clockwise direction until fully tightened. TD18/032 Issue: Change Note: 1869 Page 85...

  • Page 87: Oxygen / Toxic Sensor

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 12.2. Oxygen / Toxic sensor Step1 Turn cover securing stud anti-clockwise to allow cover to open. Step 2 Remove cover by rotating anti-clockwise TD18/032 Issue: Change Note: 1869...
  • Page 88 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 3 Remove display board which can be left to dangle on its retaining wire. Remove PCBs from the support pillars and the datamate cable from the board left in the enclosure...
  • Page 89 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 5 Remove sensor insert from FGD10A enclosure using extraction tool. TD18/032 Issue: Change Note: 1869 Page 88...
  • Page 90 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 6 Separate the two sensor insert components. Once separated remove old sensor and replace with a new sensor and mate the two component parts TD18/032 Issue: Change Note:...
  • Page 91 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 7 Apply Loctite 243 or a compound equal strength to the threads Insert the sensor housing into the FGD10A enclosure using the insertion tool. Loctite TD18/032 Issue:...
  • Page 92 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 8 Terminate the wires dependIing on which type of gas sensor is fitted. TD18/032 Issue: Change Note: 1869 Page 91...
  • Page 93 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 9 Fix datamate cable, the boards removed from the support pillars and finally the display board back into position. TD18/032 Issue: Change Note: 1869 Page 92...
  • Page 94 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 10 Replace cover and fully tighten. Step 11 Turn the cover securing stud clockwise until secure. TD18/032 Issue: Change Note: 1869 Page 93...

  • Page 95: Flammable (Pellistor) Sensor

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 12.3. Flammable (Pellistor) sensor To order a replacement ‘pellistor’ sensor, quote Stock No. SS294. Step1 Turn cover securing stud anti-clockwise to allow cover to open. Step 2 Remove cover by rotating anti-clockwise...
  • Page 96 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 3 Remove the display board - which can be left to dangle on its retaining wire. Remove the PCBs from the support pillars and the ribbon cable from the board remaining in the enclosure.
  • Page 97 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 4 Remove the flammable (pellistor) sensor board from the rear of the sensor – do not disconnect the wires from the main board. TD18/032 Issue: Change Note:...
  • Page 98 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 5 Remove sensor insert using extraction tool TD18/032 Issue: Change Note: 1869 Page 97...
  • Page 99 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 6 Mark the sensor pin position & undo the circlip that retains the sensor in its housing. Step 7 Replace the sensor taking note of the pin marking in step 6.
  • Page 100 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 8 Apply Loctite 243 or a compound equal strength to the threads. Insert the sensor housing into the FGD10A enclosure using the insertion tool. Loctite TD18/032 Issue:...
  • Page 101 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 9 Fix the pellistor sensor board back into postion. TD18/032 Issue: Change Note: 1869 Page 100...
  • Page 102 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 10 Fix ribbon cable, the boards removed from the support pillars and finally the display board back into position. TD18/032 Issue: Change Note: 1869 Page 101...
  • Page 103 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Step 10 Replace cover and fully tighten. Step 11 Turn the cover securing stud clockwise until secure. TD18/032 Issue: Change Note: 1869 Page 102...

  • Page 104: Fuses

    USES A 1Amp anti-surge fuse, housed within a surface mounted holder, is located within the FGD10A-M to prevent overloading of the electronic circuitry in the event of an internal fault. In the event of the internal fuse blowing, access can be gained using the following procedure: Switch OFF the supply to the FGD10A-M.

  • Page 105: Specification

    Magnetic Pen – Stainless Steel Grade 316 Weather guard – Stainless Steel Grade 304 & Nylon 66 Cable entries : 2 x 20mm FGD10A-M (excluding weather guard) – 1.5Kg Weights Magnetic Pen – 60 grams Weather guard – 200 grams...

  • Page 106: Dimensions

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector IMENSIONS 15.1. Oxygen / Toxic / Pellistor versions 126 Centres 2 x 7mm dia. mounting holes Optional Weatherguard Maximum Depth = 127mm TD18/032 Issue: Change Note: 1869 Page 105...

  • Page 107: Infrared Versions

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector 15.2. Infrared versions 126 Centres 2 x 7mm dia. mounting holes Optional Weatherguard Maximum Depth = 127mm TD18/032 Issue: Change Note: 1869 Page 106...

  • Page 108: Certification

    STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector ERTIFICATION The FGD10 Series of Gas Detectors are ATEX and IECEx certified for use in potentially explosive atmospheres and is marked as follows:- WARNING – DO NOT OPEN WHEN AN EXPLOSIVE GAS...
  • Page 109 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector Compliance with the Essential Health and Safety Requirements has been assured by compliance with: EN 60079-0: 2006 EN 60079-1 : 2007 Electrical data Power supply - 8Vdc to 24Vdc, 5W Relay contact rating –...
  • Page 110 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD10A-M Gas Detector USTOMER NOTES TD18/032 Issue: Change Note: 1869 Page 109...

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