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Appendix

5.2

Engineering Documentation

5.2.1 Termination & Outline Drawings

19

NOTE: The Calibration Switch is
only available on the Model S104
without a display. If the calibra-
tion switch is not present, it will
be replaced with a housing entry
plug.

If the Model S104 is or-

dered with a display, the TB1 des-
ignations for positions 2, 3, 4 & 5
will not be used.

GENERAL MONITORS
Model S104

figure 19

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24
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Summary of Contents for S104

Page 1: ...s and to the extent specifically authorized in writing by General Monitors Instruction Manual 04 97 General Monitors reserves the right to change published specifications and designs without prior notice Part No MANS104 Revision J 04 97 Model S104 Combustible Gas Enhanced Smart Sensor GENERAL MONITORS Model S104 ...

Page 2: ...n the application for which the product was intended and do not cover products which have been modified or repaired without Gen eral Monitors approval or which have been subjected to neglect accident improper in stallation or application or on which the original identification marks have been re moved or altered Except for the express war ranty stated above General Monitors disclaims all warrantie...

Page 3: ...he X P Integrity 4 0 Operation 4 1 Calibration 4 2 Digital Display Codes 4 3 Fault Codes Their Remedies 5 0 Appendix 5 1 Specifications 5 1 1 System Specifications 5 1 2 Electrical Specifications 5 1 3 Mechanical Specifications 5 1 4 Environmental Specifications 5 2 Engineering Documentation 5 2 1 Termination Outline Drawings 5 2 2 Termination Outline Drawing CE Marked Unit 5 3 Ordering Informatio...

Page 4: ...0mA Output Signal Connections Figure 11 Input Power Connections Figure 12 GMI Logo and Display Window Drawing Figure 13 Display Diagram Automatic Calibration Figure 14 Display Diagram Calibration in Progress Figure 15 Display Diagram Calibration Complete Figure 16 Display Diagram Zero Indication Figure 17 LED Flashing Sequences Figure 18 Display Diagram Test Gas Mode Figure 19 Termination Drawing ...

Page 5: ...ault conditions processing input signals from the sensor and providing outputs in the form of LED flashing sequences dis play codes and an analog output signal One Person Calibration initiate the calibra tion sequence with a magnet apply the gas and wait for the LED switch or optional dis play to indicate that the unit has completed the calibration No tools or adjustments are re quired 2 Digit Dis...

Page 6: ...e beads are a matched pair they will respond to changes in ambient temperature humidity and pressure equally figure 1 By connecting one end of each catalytic bead together a series circuit is formed This cir cuit is supplied with a constant voltage The voltage drop across each of the beads will be identical in the absence of combustible gases As combustible material is converted to heat the resist...

Page 7: ...mines what value is output to the display and the 4 20mA current generator When the CAL Switch is activated the MPU allows the user to choose between the Calibration or the Test Gas Modes While the unit is in one of these modes the MPU will fix the 0 20mA output signal to 1 5mA 0mA signal is op tional for the calibration mode only Calibration Mode When the unit is placed in this mode the MPU accep...

Page 8: ...mit ters or similar equipment l Locate the Model S104 where prevailing air currents contain the maximum concentration of gas l Locate the Model S104 near possible sources of gas leaks l Observe the Model S104 s temperature specification and locate the unit away from concentrated sources of heat l Sensor Assemblies should be mounted in an area that is as free from wind dust water shock and vibratio...

Page 9: ...tronics See Ap pendix section 5 4 3 3 Installation Instructions The overall and mounting dimensions for the Model S104 figures 5 20 should be used when making installation determinations A complete list of the mechanical specifications can be found in the Appendix section 5 1 3 To prevent possible corrosion due to moisture or condensation it is recommended that the conduit connected to the Model S...

Page 10: ...ies may be done through the use of an appropriate halogen free solvent Water or ethanol are examples of suitable solvents The accessories should be thoroughly dried with compressed air if necessary before refitting to the sensor body General Monitors recommends that the com plete system including all alarm circuitry be tested at least annually Some typical items to check during maintenance examina...

Page 11: ...and press down figure 8 opening the terminal figure 8 Insert the wire into the terminal and release the orange tab clamping the wire in the termi nal Check the connection by GENTLY tug ging the wire to ensure it is locked in figure 9 NOTE 14 AWG wire can be used if it is carefully stripped figure 9 A 4 to 20mA output signal is provided by the Model S104 Combustible Gas Enhanced Smart Sensor and ca...

Page 12: ...e Model S104 is designed to operate continuously a power switch is not included in order to prevent accidental system shut down NOTE Power must remain disconnected until all other wiring connections have been made The maximum distance between the Model S104 and the power supply is 4500 feet 1372 meters See the Appendix section 5 1 2 for cable length specifications The cable run should be as short ...

Page 13: ...he gap between the cover and the housing is less than 0015 inch 038 mm There are four entry holes in the Model S104 housing These holes are dedicated for the sensor the calibration switch and conduit Each hole is tapped for 3 4 NPT threads If a particular entry hole is not used it must be plugged during operation in the field The factory installs plugs for two of the entry holes A plastic red cap ...

Page 14: ...tc NOTE A calibration check consists of ap plying a known concentration of gas to the sensor and observing the reading on the Model S104 the Readout Relay Module or other computer data collecting systems General Monitors recommends that a calibra tion schedule be established and followed A log book should also be kept showing calibra tion dates and dates of sensor replacement Procedure with digita...

Page 15: ...S104 is placed in the Calibration Mode and no gas is applied for six minutes the unit will revert to a Fault condi tion Re applying the magnet over the GMI Logo will return the unit to the Calibration Mode Procedure without digital display See figure 17 for LED flashing sequences l If it is suspected that hydrocarbons are present it will be necessary to purge the sensor environment with Zero Air I...

Page 16: ... containing no explo sive gas The lecture bottle is filled with a standard 50 LEL mixture of gas air Using a known gas air mixture reduces the likelihood of error in field calibration The hose and cup adapter permits calibration without having to remove the sensor The following pre mixed calibration gases at approximately 50 LEL are available in a lecture bottle at 1200 psia 8 3 MPa maximum pressu...

Page 17: ...furfuryl Alcohol 89 Toluene 71 1 1 1 Trichlorethane 459 Trichloroethylene 440 Triethylamine 103 Vinyl Acetate 147 Vinyl Ethyl Ether 100 o Xylene 67 p Xylene 82 Xylenes 83 4 2 Digital Display Codes The following codes will appear on the dis play when the unit is placed in a mode other than the normal operating mode SU Start Up steady Magnetic Switch Activated flashing Test Gas Mode AC Automatic Cal...

Page 18: ...r than a Calibration Fault occurs after it is corrected the unit will return to the Start Up Mode SU F1 Failed to Zero during Calibration Faulty Sensor If both Catalytic Beads are not closely matched This may happen as a sensor approaches the end of its useful life or if the Beads have become corroded AC TION Replace the sensor Gas Present If the magnet was applied with a high level of gas present...

Page 19: ...A maximum of 20 ohms per conductor 40 ohms loop at 24VDC mini mum or a maximum of 10 ohms per conduc tor 20 ohms loop at 20VDC minimum F7 EEPROM Verification Failure This fault occurs during calibration when an attempt to verify the calibration parameters just written to the non volatile memory fails The usual cause of this is electrical interfer ence corrupting the data although on rare oc casion...

Page 20: ...y only with SST flame arrestor sensors CE Mark approval against EMC Directive and Product Safety 5 1 2 Electrical Specifications Input Power 24 VDC 250mA nom 1A during SU 20 to 30 VDC range Output Current 0 22mA 300 Ohms max load Fault 0 0mA Calibration 1 5 mA 0 0mA optional 0 100 LEL 4 to 20mA Over range 20 to 22mA Electrical Classification Class I Division 1 Groups B C D NEMA 4x rated Recommend ...

Page 21: ...flanges 6 00 152 mm 5 1 4 Environmental Specifications Operating Temperature Range Sensor See section 5 4 65 F to 200 F 55 C to 93 C High Temperature Sensor See section 5 4 65 F to 400 F 55 C to 200 C Electronics pc board assemblies 40 F to 140 F 40 C to 60 C Storage Temperature Range Smart Sensor Assembly 58 F to 158 F 50 C to 70 C Humidity Range 10 to 95 Relative Humidity non condensing 18 GENER...

Page 22: ...ion Switch is only available on the Model S104 without a display If the calibra tion switch is not present it will be replaced with a housing entry plug If the Model S104 is or dered with a display the TB1 des ignations for positions 2 3 4 5 will not be used GENERAL MONITORS Model S104 figure 19 ...

Page 23: ... 20 NOTE The Calibration Switch is only available on the Model S104 without a display If the calibration switch is not present it will be replaced with a housing entry plug figure 20 GENERAL MONITORS Model S104 ...

Page 24: ...Appendix 5 2 2 Termination Outline Drawings CE Marked Unit 21 figure 21 GENERAL MONITORS Model S104 ...

Page 25: ... 1 Sensor Included standard Combustible Gas Sensor See section 5 4 00 No Sensor 01 10001 1 standard 02 10001 1R 03 10014 1 04 10014 1R 05 10022 1 06 10058 1 07 10058 1R 08 10059 1 09 10164 1 10 10387 4 11 10391 1 12 Consult the Factory Display Option 1 No Display CSA FM standard 2 With Display CSA FM 3 With Display CSA Cenelec Calibration Signal 1 1 5 mA standard 2 0 0 mA GENERAL MONITORS Model S1...

Page 26: ...dustrial PTB 10164 1 Hydrogen Specific Alum 10387 4 General Purpose Alum Super Poison Resistant 10391 1 General Purpose SST Hi Temperature 10102 1 Dummy Sensor Sensor Housing 10252 Universal Housing Sensor Accessories 10460 2 Test Gas Applicator 10041 Duct Mounting Plate 10044 1 Dust Guard Kit 1 Guard 12 Replaceable Screens 10042 1 Replaceable Screens Box of 12 10395 1 Splash Guard Assembly 50060 ...

Page 27: ... LEL 1400155 BD Replacement Cylinder Butadiene 50 LEL 1400155 B Replacement Cylinder Butane 50 LEL 1400155 E Replacement Cylinder Ethane 50 LEL 1400155 PR Replacement Cylinder Propane 50 LEL 922 009 Pressure Regulator Gauge 1400152 1 Small Calibration Cup 1400154 Large Calibration Cup Smart Sensor S104 Replacement Parts 30441 1 Control Board Electronics 30261 1 Converter Board Electronics 30080 1 ...

Page 28: ...ied as part of a Model S104 system l Model DC100 Single Channel Readout Relay Display Module l Model DC110 Eight Channel Readout Relay Display Module l Model DC120 Explosion Proof Dual Channel Readout Relay Display Module l Model DC130 Dual Channel Readout Relay Display Module Factory Mutual Research Corporation has tested the Model S104 according to the crite ria listed under FMRC Approval Standa...

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