Related Manuals for STATUS SCIENTIFIC CONTROLS FGD4
Summary of Contents for STATUS SCIENTIFIC CONTROLS FGD4
- Page 1 STATUS SCIENTIFIC CONTROLS Issue: Date: 21/1/19 Firmware: V1.0.7 Installation, Commissioning & Routine Gas Testing Manual Gas Detector Type FGD4...
- Page 3 We declare that, on the date the equipment accompanied by this declaration is placed on the market, the equipment conforms with all technical and regulatory requirements of the directives listed below. Description of Equipment: The FGD4 Series of Fixed Gas Detectors for the detection of Oxygen, Toxic or Flammable gases. Non-certified apparatus for safe area use only. 2004/108/EC – Electromagnetic Compatibility...
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Page 5: Table Of Contents
FGD4 ..............8 CONNECTIONS 4.3................9 IRING DETAILS 4.3.1. FGD4 Toxic current sink ..............9 4.3.2. FGD4 Toxic current source ..............9 4.3.3. FGD4 Infrared current sink ..............10 4.3.4. FGD4 Infrared current source ............10 COMMISSIONING ................11 5.1. - Page 6 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD4 Gas Detector 8.2..........27 NALOGUE UTPUT ALIBRATION 8.2.1. Analogue Output Zero ................ 28 8.2.2. Analogue Output Span ............... 28 ROUTINE GAS TESTING ..............29 FUSES ....................30 SPECIFICATION ................30 DIMENSIONS &...
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Page 7: Package Contents
Stock No’s for various gas types. ** The manual may be supplied on a CD COPE OF THE MANUAL This manual relates specifically to the version of the FGD4 gas detector fitted with one of the following sensor types:- •... -
Page 8: Description
FGD4 Gas Detector ESCRIPTION The FGD4 is a fixed gas detector for use in non-explosive atmospheres. The unit comprises an instrument housing having one cable gland entry. The housing containing the gas sensor has an M27 thread and is screwed into the bottom of the unit. -
Page 9: Installation
STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD4 Gas Detector NSTALLATION To ensure effective gas detection, the FGD4 must be 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. -
Page 10: 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 +24 Vdc Fig 4a... -
Page 11: Fgd4 Infrared Current Sink
STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD4 Gas Detector 4.3.3. FGD4 Infrared current sink +24 Vdc Fig 4c I( 4 -20mA) Keypad Zero Span Sensor 4.3.4. FGD4 Infrared current source I 4- 20 mA +24 Vdc Fig 4d... -
Page 12: Commissioning
STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD4 Gas Detector OMMISSIONING 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. -
Page 13: Initial Gas Testing
The FGD4 sensor should be allowed to stabilise for the period specified on the associated calibration certificate before attempting to check the zero setting and gas response. - Page 14 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD4 Gas Detector Figure 7 – Arrangement for Application of a Certified Test Gas Flow Regulator (1 Litre/min) Certified Test Gas Cylinder TD19/001 Issue: Change Note: 1869 Page 13...
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Page 15: Test Gas
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. -
Page 16: Calibration
Calibration of the sensor can be carried out by using the buttons on the circuit board as seen in Fig1 and Fig 2. These buttons only work when the FGD4 Infrared has been powered for a minimum of 10 minutes. -
Page 17: Sensor Span
STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD4 Gas Detector 7.2. Sensor Span Always zero the sensor prior to performing a span operation. Infrared Oxygen / Toxic Keypad Keypad Zero Span Zero Span Sensor Sensor Infrared Oxygen / Toxic... -
Page 18: Calibration / Configuration Keypad
Installation, Commissioning & Routine Gas Testing FGD4 Gas Detector 7.3. Calibration / Configuration Keypad The FGD4 sensor can be calibrated via a purpose designed keypad. The keypad allows the user to carry out the following: calibrate the sensor. calibrate the 4 to 20 mA loop. - Page 19 FGD4 Infrared gas detector. Note: It is important that that the FGD4 is correctly configured for the sensor in use, prior to performing any feature available in the menu system.
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Page 20: Menu Mode Selection
The external Calibration / Configuration Keypad is used in its simplest form to calibrate the sensor for zero or gas drift. It may also be used to configure the FGD4. The following features are available via the Calibration / Configuration Keypad menu... -
Page 21: E : 1 - Sensor Zero
STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD4 Gas Detector E : 1 – Sensor Zero 7.4.1. Refer to section 8.1.1. for sensor calibration details. E : 2 – Sensor Span 7.4.2. Refer to section 8.1.2. for sensor calibration details. -
Page 22: E : 8 - Factory Restore
Installation, Commissioning & Routine Gas Testing FGD4 Gas Detector E : 8 – Factory restore 7.4.6. The FGD4 can be restored to the default factory settings. • Press MENU to open the menu system. • The sensor type will be displayed. -
Page 23: E : 17 - Sensor Gain
STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD4 Gas Detector E : 17 – Sensor gain 7.4.8. This feature is used to set up the gain of the electronics to match the range and sensor type. The range is 0 to 31, where 0 is the lowest gain and 31 is the highest gain. -
Page 24: E : 19 - Positive Zero Suppression
STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD4 Gas Detector E : 19 – Positive Zero Suppression 7.4.9. This option is used to allow the user to suppress small amounts of positive sensor zero drift. The setting can be set between 0 and 10% of the sensor range as set by the FSD value. -
Page 25: E : 25 - Positive Zero Temperature Compensation
E : 36 – Positive Zero Temperature Compensation 7.4.14. This option has no effect on the sensor version 1.0.3. E : 77 – Firmware Version 7.4.15. The FGD4 Firmware version is displayed. • Press MENU to close the menu system. TD19/001 Issue:... -
Page 26: Calibration
STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD4 Gas Detector ALIBRATION 8.1. Sensor Calibration This feature allows the sensor to be calibrated. Ensure that the correct sensor type is selected in the configuration prior to calibration. Refer to section 7.4. -
Page 27: Sensor Span
STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD4 Gas Detector 8.1.2. Sensor Span Always zero the sensor prior to performing a span operation. • From the menu system select menu option: E: 2 and press • Apply a known concentration of gas (applicable to sensor type) at a flow rate of between 500 and 1000cc/min. -
Page 28: Analogue Output Calibration
Meter range: – Control Analogue Output 0.04V – 0.20V Unit (4 – 20mA) 40mV – 200mV Advantage: No need to disturb wiring between FGD4 and control unit. Disadvantage: Measurement accuracy dependent upon resistor tolerance. TD19/001 Issue: Change Note: 1869 Page 27... -
Page 29: Analogue Output Zero
FGD4 Gas Detector 8.2.1. Analogue Output Zero • Monitor the current sourced from the analogue output of the FGD4 using a suitable method. • From the menu system select menu option: E: 4 and press • Using the buttons; adjust the output to the required level (4mA or 40mV). -
Page 30: Routine Gas Testing
OUTINE ESTING Refer to Figure 7, which shows the arrangement for applying the test gas to the FGD4. Before application of the test gas, check that the associated control panel reads zero with no known gas present in the atmosphere. If necessary, carry out adjustment of the zero setting as described in section Sensor Zero. -
Page 31: Fuses
STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD4 Gas Detector USES A 340 mA polyfuse is located within the FGD4. It will automatically reset when normal conditions return. PECIFICATION Materials : Instrument Body – injection moulded polycarbonate Cable entries : 1 x 20mm : FGD4 (excluding weather guard) –... -
Page 32: Dimensions & Mounting Details
STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD4 Gas Detector & M IMENSIONS OUNTING ETAILS The diagram below shows the mounting 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. - Page 33 STATUS SCIENTIFIC CONTROLS Installation, Commissioning & Routine Gas Testing FGD4 Gas Detector USTOMER NOTES TD19/001 Issue: Change Note: 1869 Page 32...
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