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STATUS SCIENTIFIC CONTROLS FGD10B Series Installation, Commissioning And Operation Manual Download Page 13

STATUS SCIENTIFIC CONTROLS 

 

 
 
 

Installation, Commissioning & Routine Gas Testing 

FGD10B Pellistor Gas Detector 

 

TD18/008 

Issue: 

10 

Change Note: 

1904 

Page 12 

 

 

3.2.  

Wiring details 

 

The infrared gas detector is a 4 to 20 mA loop powered device that operates 
from a supply of 8 

– 24 volt dc supply and as such only requires two wires. 

 
 

3.2.1.  

FGD10B Pellistor current sink 

 

 

 

A+

0V

 

12 - 24V DC

I(4 - 20mA)

 

PSU

 

 

 

Zero

Span

 

 
 
 

 

Fig 4b 

 
 

3.2.2.  

FGD10B Pellistor current source 

 
 
 

Note - The amplifier and power 
supply may be contained on the 
same control card. 
 
 

Summary of Contents for FGD10B Series

Page 1: ...STATUS SCIENTIFIC CONTROLS Issue 10 Date 7 1 20 Firmware V1 0 4 Installation Commissioning Routine Gas Testing Manual Gas Detector Type FGD10B Pellistor ...

Page 2: ......

Page 3: ... instrument housing and GSH4 sensor housing are certified to that standard Notified Body for Hazardous Area Certification CSA Group Netherlands B V Utrechtseweg 310 6812 AR Arnhem Netherlands Notified Body number 2813 Notified Body for ATEX Quality Assurance Notification SGS Fimko Oy Särkiniementie 3 Helsinki 00211 Notified Body Number 0598 Hazardous Area Certificate Number SIRA 08ATEX1031X II 2 G...

Page 4: ......

Page 5: ...gested calibration gas levels 17 7 CALIBRATION 18 7 1 SENSOR ZERO 18 7 2 SENSOR SPAN 19 7 3 CALIBRATION CONFIGURATION KEYPAD 20 7 4 MENU MODE SELECTION 22 7 4 1 E 1 Sensor Zero 23 7 4 2 E 2 Sensor Span 23 7 4 3 E 3 Sensor Fsd 23 7 4 4 E 4 Output Zero 4mA 23 7 4 5 E 5 Output Span 20mA 23 7 4 6 E 8 Sensor Type 24 7 4 7 E 9 Engineer diagnostics 25 7 4 8 E 12 Sensor cross reference 26 7 4 9 E 19 Posit...

Page 6: ...Gas Detector TD18 008 Issue 10 Change Note 1904 Page 5 8 2 ANALOGUE OUTPUT CALIBRATION 31 8 2 1 Analogue Output Zero 32 8 2 2 Analogue Output Span 32 9 ROUTINE GAS TESTING 33 10 SENSOR REPLACEMENT 34 10 1 PELLISTOR SENSOR 34 11 FUSES 39 12 SPECIFICATION 39 13 DIMENSIONS 40 14 CERTIFICATION 41 ...

Page 7: ...ems Description Stock No FGD10B Gas Detector Installation manual Calibration certificate Optional Weather guard SS749 Calibration Configuration Keypad SS748 Refer to www status scientific com for Stock No s for various gas types The manual may be supplied on a CD 2 SCOPE OF THE MANUAL This manual relates specifically to the version of the FGD10B gas detector fitted with one of the following sensor...

Page 8: ...as Detector TD18 008 Issue 10 Change Note 1904 Page 7 Description The FGD10B 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 following photograph ...

Page 9: ...prises an instrument housing having two cable gland entries one of which is normally fitted with a certified blank and containing the connection terminals and electronics The housing containing the gas sensor has an M27 thread and is screwed into the bottom of the unit The sensor housing itself is a certified component and must not be removed in service The main electrical features of the unit are...

Page 10: ... at the entrance to the flameproof enclosure In order to prevent dangerous overloading of the FGD10B gas detector it is fitted with an internal self resetting fuse which limits the maximum allowable power dissipation Guidance on the correct installation of systems is provided by EN60079 14 2014 It is the responsibility of the installer to ensure compliance with the relevant standards To ensure eff...

Page 11: ... use of stainless steel is recommended When connecting the cores inside the unit it is beneficial to use pointed nose pliers to carefully guide the cable cores from the cable entries at the rear of the enclosure towards the PCB mounted terminal connections situated near to the middle of the enclosure 3 1 Mounting and terminal access The FGD10B should be mounted and secured using the mounting holes...

Page 12: ...oured cable Armoured cable Mount vertically as shown Sensor Important Connect enclosure earth point to a high integrity earth Keypad Zero Span Figure 2 Armoured Cable Gland Installation ATEX Certified compound filled conduit seals stopping boxes Conduit Conduit Mount vertically as shown Keypad Important Connect enclosure earth point to a high integrity earth 4 20 mA 0v Power Sensor Zero Span Figur...

Page 13: ...ng details The infrared gas detector is a 4 to 20 mA loop powered device that operates from a supply of 8 24 volt dc supply and as such only requires two wires 3 2 1 FGD10B Pellistor current sink A 0V 12 24V DC I 4 20mA PSU Zero Span Fig 4b 3 2 2 FGD10B Pellistor current source Note The amplifier and power supply may be contained on the same control card ...

Page 14: ...nt cover has not been contaminated with dirt paying particular attention to the thread Replace the cover by rotating it several times clockwise until it reaches its limit then secure using the locking screw turning in an anti clockwise direction do not over tighten 4 1 Applying power Once the installation is complete and the covers are secure then power can be applied The power source should be be...

Page 15: ...ng to check the zero setting and gas response 4 2 Zero gas With no gas present check that the associated control panel display reads zero a If the instrument reads zero then no adjustment is required and gas response testing may now be carried out as described in Section 0 b If the instrument does not read zero then adjustment of the zero setting is required as described in Section 5 1 1 Sensor Ze...

Page 16: ... Gas Detector TD18 008 Issue 10 Change Note 1904 Page 15 Figure 7 Arrangement for Application of a Certified Test Gas Certified Test Gas Cylinder Remote Sampling Point 6mm O D Sampling Tube Calibration Adaptor Metal sampling adaptor Stock No SS336 With weatherguard Flow Regulator 1 Litre min ...

Page 17: ...on adaptor or b remotely by connecting a test gas sampling tube to the appropriate sampling calibration adaptor and installing a test point at the remote end of the tube Method b avoids the need to gain direct access to the unit in order to carry out routine gas testing The sample tube should be taken to a convenient point and sited such that the risk of contamination is minimised A means must be ...

Page 18: ...te 1904 Page 17 4 2 2 Sampling time Apply the test gas and allow a sufficient time for the sample to reach the gas detector The response time will vary according to the length of the sampling tube 4 2 3 Suggested calibration gas levels Pellistor sensor Zero 20 9 v v oxygen balance nitrogen Span 50 of measuring range FSD balance air ...

Page 19: ... on the circuit board as seen in Fig1 and Fig 2 These buttons only work when the FGD10B has been powered for a minimum of 10 minutes 4 3 Sensor Zero Fig 1 Ensure the sensor is in a zero gas environment Note Where a purging gas has to be applied use a flow rate of between 500 and 1000 cc min Allow sufficient time for the sensor to respond Press the Zero button zero and hold for a minimum of 5 secon...

Page 20: ...nown concentration of gas applicable to sensor type at a flow rate of between 500 and 1000 cc min Allow time for the sensor to respond Press the Span button span and hold for a minimum of 5 seconds to span the sensor Turn off and disconnect the calibration gas Note The calibration gas level must match with the level stored in the instrument If the gas level is does not match then the keypad must b...

Page 21: ... allows the user to carry out the following 1 Calibrate the sensor 2 Calibrate the 4 to 20 mA loop 3 View the current gas level 4 View the sensor raw data for diagnostic purposes Connect the keypad into the FGD10B as shown below The display will give the following messages SSCL Company 88 88 Segment test SSCL Manufacturer 1 0 3 Firmware version 0 0 Gas reading Note if the display is continually sh...

Page 22: ...ction Alternate Function MENU MENU Open Close Menu Password UP Next Increase 1 DOWN Previous Decrease 2 ENTER Accept selection 3 This section of the manual discusses how the available menu options can be accessed how the associated parameter may be changed via the selected menu option and what effect the change to the parameter has on the operation of the FGD10B Infrared gas detector Note It is im...

Page 23: ... Output Zero 4mA E 3 Sensor FSD E 5 Output Span 20mA E 9 Diagnostics E 12 Cross reference E 19 Positive zero suppression E 20 Negative zero suppression E 25 Zero temperature compensation ve E 34 Span temperature compensation ve E 35 Span temperature compensation ve E 36 Zero temperature compensation ve E 77 Firmware version The menu options are selected as follows Press the MENU button E 1 appears...

Page 24: ... Feature sets the FSD of the instrument It must be matched to the sensor Press MENU to open the menu system Using the or buttons select menu option E 3 Press Using the or buttons change the display to the required setting Press to store the new value Note Pressing the MENU button rather than the button exits without any change Press MENU to close the menu system 4 6 4 E 4 Output Zero 4mA Refer to ...

Page 25: ...that is a pellistor type device Press MENU to open the menu system Using the or buttons select menu option E 8 Press Using the or buttons set the required sensor type Press to store the new value Note Pressing the MENU button rather than the button exits without any change Press MENU to close the menu system Note This option will restore the sensor to the factory default values The user must perfo...

Page 26: ...eature is a view only feature No configuration changes are possible from within this menu The information is for use of Status Scientific Controls personnel From the menu system select menu option E 9 and press Using the or buttons display the required setting The displayed values are as follows E 90 Reading E 91 Current sensor temperature C E 92 Sensor AtoD counts E 96 Status flags ...

Page 27: ...o open the menu system Select menu mode E 12 refer to section Error Reference source n ot found and press ENTER Press ENTER Using the INCREASE and DECREASE buttons set the required cross reference factor Press ENTER to store the new value Note Pressing MENU instead of ENTER aborts any changes the existing factor is displayed on exit Press MENU to close the menu system Ask Status Scientific Control...

Page 28: ...red zero suppression value Press ENTER to store the new value Note Pressing the MENU button rather than the R button exits without any change Press MENU to close the menu system 4 6 10 E 20 Negative Zero Suppression This option is used to allow the user to suppress small amounts of negative sensor zero drift The setting can be set between 0 and 10 of the sensor range as set by the FSD value Press ...

Page 29: ...or version 1 0 3 4 6 12 E 34 Positive Span Temperature Compensation This option has no effect on the sensor version 1 0 3 4 6 13 E 35 Negative Span Temperature Compensation This option has no effect on the sensor version 1 0 3 4 6 14 E 36 Positive Zero Temperature Compensation This option has no effect on the sensor version 1 0 3 4 6 15 E 77 Firmware Version The FGD10b Firmware version is displaye...

Page 30: ...MENU key again will result in the restricted user access i e only the zero and span options will be available Entering the correct password will give access to the full menu facility 5 1 1 Sensor Zero From the menu system select menu option E 1 and press Ensure the sensor is in a zero gas environment Note Where a purging gas has to be applied use a flow rate of between 500 and 1000cc min Allow suf...

Page 31: ...ow rate of between 500 and 1000cc min Allow time for the sensor to respond Using the and buttons set the reading to that of the calibration gas level Press to span the sensor will be displayed to confirm the sensor span has been performed Note pressing MENU rather than ENTER exits the span feature without performing the calibration Wait until the reading is stable if necessary press again to span ...

Page 32: ...alogue output Advantage Direct measurement of output Disadvantage The analogue output has to be disconnected to allow the connection of the meter Voltage measurement Permanently connect a 10R resistor in series with the analogue output When calibration is required connect a voltmeter or multimeter set to measure voltage in the mV range across the 10R resistor Advantage No need to disturb wiring be...

Page 33: ...Pressing MENU rather than exits the zero feature without performing the calibration Press MENU to close the menu system Note The ZERO factor will be displayed momentarily on exit 5 2 2 Analogue Output Span Always zero the analogue output prior to performing a span operation From the menu system select menu option E 5 and press button 4 Using the and buttons adjust the output to the required level ...

Page 34: ...to provide a reading of 90 T90 of its final value e g to reach 45ppm when using a 50ppm H2S test gas This reading should be retained for future reference as it can provide an indication of the health of the sinter flame arrestor This is situated in the base of sensor housing and it is through this device that the gas passes in order to reach the sensor itself If necessary carry out adjustment of t...

Page 35: ...ning Routine Gas Testing FGD10B Pellistor Gas Detector TD18 008 Issue 10 Change Note 1904 Page 34 7 SENSOR REPLACEMENT 7 1 Pellistor sensor Step1 Turn cover securing stud clockwise to allow cover to open Step 2 Remove cover by rotating anti clockwise ...

Page 36: ...tallation Commissioning Routine Gas Testing FGD10B Pellistor Gas Detector TD18 008 Issue 10 Change Note 1904 Page 35 Step 3 Remove the main PCB and unplug the pellistor sensor board Step 4 Remove sensor insert using extraction tool ...

Page 37: ...as Detector TD18 008 Issue 10 Change Note 1904 Page 36 Step 5 Undo the circlip that retains the sensor in its housing And replace the sensor Step 6 Apply Loctite 243 or a compound equal strength to the threads Insert the sensor housing into the FGD10B enclosure using the insertion tool Loctite ...

Page 38: ...ng Routine Gas Testing FGD10B Pellistor Gas Detector TD18 008 Issue 10 Change Note 1904 Page 37 Step 7 Place the pellistor sensor board onto the pellistor sensor pins and fix the pellistor main board into position Step 8 Replace cover and fully tighten ...

Page 39: ...OLS Installation Commissioning Routine Gas Testing FGD10B Pellistor Gas Detector TD18 008 Issue 10 Change Note 1904 Page 38 Step 9 Turn the cover securing stud anti clockwise until the stud is in tight contact with the cover ...

Page 40: ...20mm or 2 x NPT or 2 x NPT Weights FGD10B excluding weather guard 0 75Kg Weather guard 200 grams Sensor type Electrochemical Input voltage 8 to 24 volts dc Input power 5 Watts maximum Internal fuse 340mA Nanofuse Analogue output 4 to 20mA 10 bit resolution Comms output Communications with hand held calibration keypad at 38400 baud 3V logic Measurement range Depends upon sensor type Response time T...

Page 41: ... Installation Commissioning Routine Gas Testing FGD10B Pellistor Gas Detector TD18 008 Issue 10 Change Note 1904 Page 40 10 DIMENSIONS Optional Weatherguard 104 108 Centres 160 104 2 x 7mm dia mounting holes Maximum Depth 127mm ...

Page 42: ...SI IR sensor and its housing in the gas detector is 0 11mm maximum and should not be enlarged during maintenance etc 2 Only Loctite 243 or a compound equal strength shall be re applied to the threads of the type SI M sensor after replacing the sensing element 3 The SI IR sensors shall not be installed or removed when an explosive gas atmosphere is present WARNING DO NOT OPEN WHEN AN EXPLOSIVE GAS ...

Page 43: ...ical data Power supply 8Vdc to 24Vdc 5W Installation instructions The cable entry devices and blanking elements of unused apertures shall be of a certified flameproof type suitable for the conditions of use and correctly installed With the use of conduit a suitable certified sealing device such as a stopping box with compound shall be provided immediately at the entrance to the flameproof enclosur...

Page 44: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10B Pellistor Gas Detector TD18 008 Issue 10 Change Note 1904 Page 43 CUSTOMER NOTES ...

Page 45: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD10B Pellistor Gas Detector TD18 008 Issue 10 Change Note 1904 Page 44 ...

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