GM TS420 manuale d’uso

Model TS420 Oxygen Deficiency Detector The information and technic al data disclosed in this document may be used and dissemin ated only for the purposes and to the extent specificall y authorized in writing by General Monitors. Instruction Manual 11/00 General Monitors reserves the right to cha nge published specificatio ns and designs without pri[...]

i Model TS420 WARRANTY STATEMENT General Monitors warrant s the Model TS420 to be free from defe cts in workmanship or material under normal use an d service within two (2) years (sensor cell s one (1) year) from the date of shipment. General Monitors will repair or replace without charge a ny equipment found to be defective during the warranty per[...]

Model TS420 ii System Integrity Verification General Monitors missi on is to benefit society by providing solutions through in dustry leading safety products, services and systems t hat sa ve lives and protect capital resources from the dangers of hazardous flam es, gases and vapors. The safety products you have purchase d should be handled careful[...]

Model TS420 iii Periodic Testing/Calibration of Field Devices Periodic testing/calibratin g should be performe d per the manufa cturers’ recommendations a nd instructions. Testing/Calibrating p rocedures should include, but not be limited to: ! Verify zero reading ! Apply a known concentration of gas, or a simulated test device provided by the ma[...]

Model TS420 Quick Start Guide iv N I T O R S E N E R A L H A N D T I G H T E N O N L Y (GREEN/Y ELLOW) FRAME GROUND LOOP- (WHITE) LOOP+ (RED ) Ø1.75" M O D E C A L 4.50" 3/4 NPT 1 1/2-20 UN-2 A 1. Mount and Wire the Detector (pages 5 thro ugh 9) There are no standard rules for dete ctor plac ement since the optimum sensor lo cation is di[...]

Model TS420 Quick Start Guide v Intrinsically Safe Barriers In order for the TS420 to be used with cl assified equipment inside of the hazardous area, it is necessary for the customer to purchase either a Galvanic or Zener Diode Ba rrier, which should be mounted in the non-classified area betwee n the TS420 and the facilities’ control room. A lis[...]

Model TS420 Quick Start Guide vi NOTE - Power must remain disconnected until all wiring co nnections are made. The absolute maximum distance betwee n the TS420 and the power supply is 8000 feet (243 8 meters). Depending on the application, general pu rpose o r intrinsically safe, the cable length will depend on the intrinsically safe barrier chosen[...]

Model TS420 Quick Start Guide vii 3. Calibrate the Detector. Activating the “ CAL ” switch will automati cally disable the external alarm circuits by fixing the analog output current to 3.75mA. General Monitors recommends that the T S420 be calibrated within the first twenty-four (24) hours after initial start-up, and that calibration be chec k[...]

Model TS420 Quick Start Guide viii NOTE - If the unit fails to calibrate a flashing “ MO DE ” LCD will be displayed. The sensor must see “clean” air for at least fifteen (15) minutes b efore a second calibration is attempted by reapplying the magnet. The instrument is now ready to operate! Pleas e consult the manual for more information on [...]

ix Model TS420 Table of Contents WARRANTY STATEMENT ..........................................................................................i System Integrit y Verification ......................................................................................... ii Commissioning Safe ty Systems ....................................................[...]

Model TS420 x Table of Figures Page Figure Q-A Outline and Di mensional Dr awing ...................................................................... iv Figure Q-B Wiri ng Diagram ................................................................................................... v Figure Q-C Operating Modes, Indicators and Outputs................[...]

1 Model TS420 1.0 Introduction 1.1 General Description The Model TS420 is a 4-20mA, loop-powered Oxyge n Deficiency detector used for monitoring Oxygen levels. The micro-processor based electr oni cs process information at the sen sor site and are contained within a corrosio n and solvent resistant plastic housing. An LCD display provides status in[...]

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Model TS420 3 2.0 Detector Assembly 2.1 Sensor Assembly General Monitors use s a two-electrode electroc hemical cell (Figure 2) to provide a stable an d accurate gas detector. Figure 2 Oxygen Deficiency Sensor Assembly The oxygen sensor is of the self-powered, diffusion limited, metal air battery type. It contains an anode, electrolyte and an air c[...]

Model TS420 4 2.2 Control Electronics The Model TS420’s electronics are co ntained within a plastic housing so that se nsor information can be processed at the point of detection. The Model TS420 provid es a 4-20 mA output signal proportional to 0 to 25% V/V O 2 full-scale gas con centration at the detector. Ambient Air is approximate 20.9% V/V O[...]

Model TS420 5 3.0 Installation 3.1 Receipt of Equipment All equipment shipped by General Mo nitors is packed in shock ab sorbing containers, which provide considerable p rotection against physical damage. The cont ents should be carefully removed and checked a gainst the packing slip. If any damage has occurred or if there is any discrepancy in the[...]

Model TS420 6 3.3 Installation Instructions The TS420 is shipped without the sen sor installe d. The sensor must be installed into the detector and calibrated for prop er operation. S ee Section 4.5 for installation instructions and Section 4.3 for calib ration instruction s. Once correctly installed, the TS420 requires little or no maintenance oth[...]

Model TS420 7 3.4 Wiring Connections The two wires at the base of the TS420 provide a 4-20mA loop- po wered output. The red wire is the “loop +” lead and the white wire is t he “loop -” lead (Figure 4). A third gree n/yellow wire is provided for frame ground. It is recommended that a two wire, shi elded cable be used for making po wer and o[...]

Model TS420 8 4.0 Operation 4.1 Applying Power Before applying power to the system for the first time, all wiring con nections should be checked for correctness. The sensor should be all owed to stabilize prior to calibration. The stabilization time should be one (1) hou r for all sensors. Initial Power-up The TS420 has been shipped un-calibrated, [...]

Model TS420 9 4.2 Operating Modes The TS420 has four distinct operating mode s: St art-up, Normal Operation, Calibration and Fault. The mode is indicated by both the analog output and the LCD display. See Figures 5 and 6. 4.3 Calibration Activating the “CAL” switch will automatically dis able the external alarm ci rcuits by fixing the analog ou[...]

Model TS420 10 CALIBRATION INDICATOR CAL MODE Magnet Applied ❑ ■ Magnet Recognized ■ ❑ Cal Proceeding ✹ ✹ Figure 6 Flow Diagram NOTE - If the unit fails to calibrate a flashing “MODE” LCD will be displayed. The sensor must see “clean” air for at least fifteen (15) minutes b efore a second calibration is attempted by reapplying t[...]

Model TS420 11 NOTE – Calibrating the TS420 in norm al atmospheric air may introduce a cons iderable error due to the affects of temperature and humidity. Ambient temperatu re and humidity can affect the amount of oxygen in the atmosphere (see Fi gure 9). Figure 9 Change in % Oxygen in the atmosphere with Relativ e Humidity at constant Temperatur[...]

Model TS420 12 Remove paper liner from gasket, if present CALI BRATION PLUG CALI BRATION CUP 4. Examine the sensor and ensure that it is the correct gas type for y our application. 5. Align the arrow on the sensor label with the notch on the TS420 body. Install the sensor by pushing sensor’ s pins into pin sockets on the TS420, see Figure 10. Fig[...]

Model TS420 13 Figure 11, Calibration Kit with Bottle 6. Screw on TS420 sensor cap. 7. Apply power to the unit and allow the sensor to stabilize prior to initial calibration. The stabilization time should be at least one (1) hou r for all sensors. 8. Calibrate new sensor (see Section 4.3 ). NOTE - The TS420 will stay in fault anytime the sensor is [...]

Model TS420 14 5.0 Appendix 5.1 Specifications 5.1.1 System Specifications Sensor Type: Electrochemical cell Typical Life (sensing element): 2 years in normal air Warranty : Two years for the electronics One year for the sensor cell Malfunctions Monitored: Calibration Errors Data Memory Errors Measuring Range: Oxygen 0-25% V/V O 2 Response Time: T9[...]

Model TS420 15 Intrinsically Safe Parame ters U i /V MAX = 35VDC I i /I MAX = 100mA C i = 0 L i = 500 µH Input Power: 10 to 35VDC range; 3.5 to 22mA loop powered Output Current: (600 Ω max. @ 24VDC) (120 Ω max. @ 10VDC) Signal Range 3.5 to 22mA Fault 3.5mA Start-up 3.6mA Calibration 3.75mA Detection Range 4 to 20mA Over-range 22mA Electrical C[...]

Model TS420 16 5.1.5 Intrinsically Safe System Requirements NOTE - Refer to control drawing 45217 Rev A. (Section 5.2.2) The TS420 is approved as intrinsi cally safe on its own (entity approved). However, when installing the TS420 into a system, there are requi rem ents, which must be strictly followed to maintain the intrinsic safety of the system[...]

Model TS420 17 N I T O R S E N E R A L H A N D T I G H T E N O N L Y (GREEN/YELLOW) FRAME GROUND LOOP- (WHITE) LOOP+ (RED) Ø1.75" M O D E C A L 4.50" 3/4 NPT 1 1/2-20 UN-2 A 5.2 Engineering Documentation 5.2.1 Outline & Dimensional Drawing Figure 12 Outline and Dimensional Dra w ing[...]

Model TS420 18 5.2.2 Control Dra w ing Figure 13 Control Drawing[...]

Model TS420 19 5.2.3 Sample Installation Figure 14 Sample Installation T A 5 0 2 A T R I P A M P L I F I E R 4 5 1 6 0 - 1 3 / 4 " N P T J U N C T I O N B O X A S S Y T S 4 2 0 T O X I C G A S D E T E C T O R M T L 7 0 7 + S H U N T B A R R I E R W I R I N G P E R A N S I / I S A - R P 1 2 . 6 - 1 9 9 5 B A R R I E R B U S S A F E A R E A ( N [...]

Model TS420 20 5.2.4 Junction Boxes Figure 15 10252 Round Aluminum Junction Box Figure 16 31305-2 Aluminum Junction Box 1 2 3 4 5 6 7 8 9 1 0 C A L F G 4 - 2 0 m A C B U S S - C B U S S + + 2 4 V C O M[...]

Model TS420 21 Figure 17 45160-1 Plastic Junction Box, NPT; 45 160-2 Plastic Junction Box, M20 5.2.5 Splash-Guard Figure 18 70631-2 Splash - Guard[...]

Model TS420 22 5.2.6 Accessories Figure 19 45170-1 Flow Block Figure 20 45147-1 Flow Block Retainer 5.2.7 Calibration Accessories Figure 21 914-152 Calibration Plug Figure 22 1400152-1 Calibration Cup[...]

Model TS420 23 5.3 Ordering Information TS420 - 3 0 0 - 101 - 1 0 Junction Box: 0 = None 1 = 45160-1 Junction Box – Plastic NPT 3 = 10252 Junction Box – Round, Aluminum[...]

Model TS420 24 5.4 Calibration Schedule for Problem Environments Detector Serial Number:__ ______________________ Location:____________________ _ 1) Installation and preliminary calibration. Re cord date after prelim inary calibration is performed: Date:______________ _ 2) 24-hour calibration. Record date after 24-hour calibration is performed: Dat[...]

Model TS420 25 5.5 Spare Parts & Accessories TS420 Spare Parts The Model TS420 has potted electroni cs, therefore, there are no replacement boards available for this unit. The part numbers of the TS420 itself are: TS420 Oxygen Deficiency 45200-1 Sensor Cap 45103-1 Replacement Sensors Oxygen Deficiency Sensor 45213-1 TS420 Mounting Accessories S[...]