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STATUS SCIENTIFIC CONTROLS

Installation, Commissioning & Routine Gas Testing

FGD4 Gas Detector

TD19/001

Issue:

5

Change Note:

1869

Page 9

4.3.

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.

4.3.1.

FGD4 Toxic current sink

4.3.2.

FGD4 Toxic current source

Sensor

Keypad

Zero

Span

0V

+24 Vdc

I 4- 20 mA

Fig 4b

0V

+24 Vdc

I( 4 - 20mA)

Fig 4a

Sensor

Keypad

Zero

Span

+Ve

-Ve

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Содержание FGD4

Страница 1: ...STATUS SCIENTIFIC CONTROLS Issue 5 Date 21 1 19 Firmware V1 0 7 Installation Commissioning Routine Gas Testing Manual Gas Detector Type FGD4 ...

Страница 2: ......

Страница 3: ...nce criterion C EN61000 6 2 2005 Electromagnetic compatibility Generic standards Immunity standard for industrial environments EN61000 6 4 2007 Electromagnetic compatibility Generic emission standard Industrial environment 2006 95 EC Low Voltage Directive LVD Harmonised Standards Used EN 61010 1 2010 Safety requirements for electrical equipment for measurement control and laboratory use Part 1 Gen...

Страница 4: ......

Страница 5: ... 3 Suggested calibration gas levels 14 7 CALIBRATION 15 7 1 SENSOR ZERO 15 7 2 SENSOR SPAN 16 7 3 CALIBRATION CONFIGURATION KEYPAD 17 7 4 MENU MODE SELECTION 19 7 4 1 E 1 Sensor Zero 20 7 4 2 E 2 Sensor Span 20 7 4 3 E 3 Sensor Fsd 20 7 4 4 E 4 Output Zero 4mA 20 7 4 5 E 5 Output Span 20mA 20 7 4 6 E 8 Factory restore 21 7 4 7 E 9 Engineer diagnostics 21 7 4 8 E 17 Sensor gain 22 7 4 9 E 19 Positi...

Страница 6: ...ine Gas Testing FGD4 Gas Detector TD19 001 Issue 5 Change Note 1869 Page 5 8 2 ANALOGUE OUTPUT CALIBRATION 27 8 2 1 Analogue Output Zero 28 8 2 2 Analogue Output Span 28 9 ROUTINE GAS TESTING 29 10 FUSES 30 11 SPECIFICATION 30 12 DIMENSIONS MOUNTING DETAILS 31 ...

Страница 7: ...D4 Gas Detector Installation manual Calibration certificate Optional Weather guard Calibration Configuration Keypad 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 FGD4 gas detector fitted with one of the following sensor types An Oxygen sensor Or An electrochemic...

Страница 8: ...sing 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 Power supply 8 to 24 volts dc non intrinsically safe Loop powered 4 to 20mA dc Gland entry threads available 20mm or NPT 3 1 Gas types Versions of the FGD4 Oxygen Toxic are avai...

Страница 9: ... located at a height appropriate to the density of the target gas relative to air 4 1 Cable entries The cable entry threads is 20mm female The FGD4 enclosure is manufactured from injection moulded poly carbonate and as such care should taken not to over tighten the gland 4 2 FGD4 connections FGD4 Oxygen Toxic Infrared Sensor Keypad Zero Span Ve Ve Sensor Keypad Zero Span 4 20mA 0V Supply Ve Power ...

Страница 10: ...4 3 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 4 3 1 FGD4 Toxic current sink 4 3 2 FGD4 Toxic current source Sensor Keypad Zero Span 0V 24 Vdc I4 20 mA Fig4b 0V 24 Vdc I 4 20mA Fig 4a Sensor Keypad Zero Span Ve Ve ...

Страница 11: ...oning Routine Gas Testing FGD4 Gas Detector TD19 001 Issue 5 Change Note 1869 Page 10 4 3 3 FGD4 Infrared current sink Sensor Keypad Zero Span 0V I 4 20mA 24Vdc Fig4c 4 3 4 FGD4 Infrared current source Sensor Keypad Zero Span 0V 24 Vdc I4 20 mA Fig4d ...

Страница 12: ...Page 11 5 COMMISSIONING Following completion of the installation Replace the cover taking care not to trap the wiring and fix with the 4 allen screws do not over tighten 5 1 Applying power Once the installation is complete and the covers are secure then power can be applied The power source should be between 12 and 24 volts dc ...

Страница 13: ...eck the zero setting and gas response 6 1 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 6 2 b If the instrument does not read zero then adjustment of the zero setting is required as described in Section 8 1 1 Sensor Zero c I...

Страница 14: ...LS Installation Commissioning Routine Gas Testing FGD4 Gas Detector TD19 001 Issue 5 Change Note 1869 Page 13 Figure 7 Arrangement for Application of a Certified Test Gas Certified Test Gas Cylinder Flow Regulator 1 Litre min ...

Страница 15: ...lation is now complete c If the instrument does not read correctly then adjustment of the sensor span setting is required as described in Section 8 1 2 Sensor Span 6 2 1 Gas connection points Certified test gas is applied directly to the FGD4 via the appropriate sampling calibration adaptor 6 2 2 Sampling time Apply the test gas and allow a sufficient time for the sample to reach the gas detector ...

Страница 16: ...nd Fig 2 These buttons only work when the FGD4 Infrared has been powered for a minimum of 10 minutes 7 1 Sensor Zero Infrared Oxygen Toxic Ensure the sensor is in a zero gas environment Note Where a purging gas has to be applied use a flow rate of between 300 and 1000 cc min Allow sufficient time for the sensor to respond Press the Zero button zero and hold for a minimum of 5 seconds to zero the s...

Страница 17: ... known concentration of gas applicable to sensor type at a flow rate of between 300 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...

Страница 18: ... 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 FGD4 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 showing the...

Страница 19: ... 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 FGD4 Infrared gas detector Note It is important...

Страница 20: ...ore Oxygen Toxic sensor E 9 Diagnostics E 17 Sensor Gain Toxic sensor E 19 Positive zero suppression Toxic sensor E 20 Negative zero suppression Toxic sensor E 25 Zero temperature compensation ve Toxic sensor E 34 Span temperature compensation ve Toxic sensor E 35 Span temperature compensation ve Toxic sensor E 36 Zero temperature compensation ve Toxic sensor E 77 Firmware version The menu options...

Страница 21: ...re 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 7 4 4 E 4 Output Zero 4mA Refer to sectio...

Страница 22: ...ange Press MENU to close the menu system Note This option will restore the sensor to the factory default values The user must set all parameters before using the unit 7 4 7 E 9 Engineer diagnostics This feature 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...

Страница 23: ... 180 Ind Sci 0 200 0 5 ppm 2 H2S 180 Ind Sci 0 500 1 ppm 0 H2S L 450 Surecell 0 50 0 05 ppm 4 H2S L 450 Surecell 0 100 0 1 ppm 2 H2S L 450 Surecell 0 300 0 5 ppm 0 H2S 4HS 850 City Tech 0 50 0 05 ppm 2 H2S 4HS 850 City Tech 0 250 0 1 ppm 0 CO 90 Ind Sci 0 200 0 2 ppm 6 CO 90 Ind Sci 0 500 0 5 ppm 2 CO 90 Ind Sci 0 1000 1 ppm 0 CO M 85 Surecell 0 200 0 2 ppm 6 CO M 85 Surecell 0 500 0 5 ppm 2 CO M ...

Страница 24: ...ro 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 7 4 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 MENU t...

Страница 25: ...sion 1 0 3 7 4 12 E 34 Positive Span Temperature Compensation This option has no effect on the sensor version 1 0 3 7 4 13 E 35 Negative Span Temperature Compensation This option has no effect on the sensor version 1 0 3 7 4 14 E 36 Positive Zero Temperature Compensation This option has no effect on the sensor version 1 0 3 7 4 15 E 77 Firmware Version The FGD4 Firmware version is displayed Press ...

Страница 26: ...y 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 8 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 300 and 1000cc min Allow sufficient...

Страница 27: ... 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 the sen...

Страница 28: ... 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 between ...

Страница 29: ...ust the output to the required level 4mA or 40mV Press Note Pressing MENU rather than exits the zero feature without performing the calibration Press MENU to close the menu system 8 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...

Страница 30: ...ut adjustment of the zero setting as described in section Sensor Zero 2 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 3 If necessary carry out adjustment of the span setting as described in section 8 1 2 Carrying out the above procedure and comparing the results with previous readings...

Страница 31: ...5Kg Weather guard 200 grams Sensor type Electrochemical or Infrared 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 Typically T90 40 sec depends upon sensor type IP rating En...

Страница 32: ...ounting centres for the FGD Detector Head Enclosure Depth 75mm approx Note The front panel lid of the detector head opens to allow access to the screw terminals situated inside Sufficient space should be allowed around the mounting position so that this action is not restricted Fixings Required 2 off M6 Fasteners Rawl Bolts or similar dependent on mounting wall construction 140 122 102 102 122 ...

Страница 33: ...STATUS SCIENTIFIC CONTROLS Installation Commissioning Routine Gas Testing FGD4 Gas Detector TD19 001 Issue 5 Change Note 1869 Page 32 CUSTOMER NOTES ...

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