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General Monitors S214 Instruction Manual

Hydrogen sulfide gas enhanced smart sensor (single point calibration)
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Model S214
Hydrogen Sulfide Gas
Enhanced Smart Sensor
(Single Point Calibration)
The information and technical data disclosed in this
document may be used and disseminated only for the
purposes and to the extent specifically authorized in
writing by General Monitors.
Instruction Manual
General Monitors reserves the right to change
published specifications and designs without prior
notice.
Part No
Revision
05/97
MANFL3100/1
E/11-99

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Summary of Contents for General Monitors S214

  • Page 1 General Monitors. Instruction Manual 05/97 General Monitors reserves the right to change published specifications and designs without prior notice. Part No MANFL3100/1...
  • Page 2 GENERAL MONITORS Model S214 WARRANTY STATEMENT WARNINGS General Monitors warrants the Model S214 HYDROGEN SULFIDE GAS IS AN to be free from defects in workmanship or EXTREMELY TOXIC GAS, material under normal use and service within EXPOSURE MAY RESULT IN A LOSS two (2) years from the date of shipment.

  • Page 3: Table Of Contents

    GENERAL MONITORS Model S214 Ta ble of Con tents War ranty Warn ing - Toxic Dan ger Page # Warn ing - Elec tro static Dam age 1.0 In tro duc tion Gen eral De scrip tion Fea tures and Bene fits Ap pli ca tions 2.0 Sen sor As sem bly...
  • Page 4 Fig ure 17 Ter mi na tion Draw ing - S214 Fig ure 18 Out line and Di men sional Draw ing - S214 Fig ure 19 Ter mi na tion Draw ing - CE Mark Units Cali bra tion Sched ule for Prob lem En vi ron ments...

  • Page 5: In Tro Duc Tion

    1.1 Gen eral De scrip tion This is a par tial list ing of ap pli ca tions. The Model S214 is an En hanced Smart Sen sor as sem bly that is used for de tect ing Hy dro gen Refineries Sul fide gas.

  • Page 7: Sen Sor As Sem Bly

    Model S214 2.0 Sen sor As sem bly 2.1 Sen sor Sig nal Proc ess ing General Monitors uses a proprietary Metal Oxide Semiconductor (MOS) film on the sensor for detecting hydrogen sulfide (H gas. The MOS film is deposited onto a substrate between two electrodes (figure 1).

  • Page 8: Power Sup Ply

    Sen sor As sem bly 2.2 Power Sup ply fig ure 5 The Model S214 operates from a +24VDC (nominal) input. This unregulated source is fed to a converter board that produces voltages (see figure 4). These signals are the...

  • Page 9: In Stal La Tion

    The presence of poisons and contaminants in be coated by contaminating substances. an area does not necessarily preclude the use Although the Model S214 is RFI resistant, it of a Model S214 Enhanced Smart Sensor. The should not be mounted in close proximity to feasibility of using a sensor in such areas radio transmitters or similar equipment.

  • Page 10: In Stal La Tion In Struc Tions

    RE-CAP the sensor anytime the The overall and mounting dimensions for the system power is off for more than an hour. Model S214 (figures 6 & 18) should be used when making installation determinations. A CAUTION: complete list of the mechanical specifications General Monitors discourages the painting of can be found in the Appendix (section 5.1.2).

  • Page 11: Ter Mi Nal Con Nec Tions

    GENERAL MONITORS Model S214 In stal la tion Some typical items check during maintenance examinations are: Installation Instructions ( continued The sensor mounting, to see it is secure. NOTE: Acetic acid will cause damage to The sensor screen, to see it is clear of oil,...
  • Page 12 The 4 to 20mA signal provides for control static electricity. All wire connections are room or other locations remote to the Model made to the Terminal Blocks. S214 to display indications of operation and alarm conditions. It is recommended that a three wire (red, fig ure 10...
  • Page 13 The maximum distance between the Model fig ure 11 S214 and the power supply is 4500 feet (1372 meters). See the Appendix (section 5.1.3) for If a device other than a General Monitors cable length specifications.

  • Page 14: Ap Ply Ing Power

    If power is left on when removing or loosening the cover bolts on the Model S214 it will be necessary to de-classify the area. When replacing the cover, the gap between the lid and the housing should be less than .0015 inch...

  • Page 15: Op Era Tion

    - bra tion pro cess. Gen eral Moni tors rec om mends that the Model S214 Hy dro gen Sul fide (H S) Gas Smart Sen sor be cali brated one hour af ter and...

  • Page 16: Cali Bra Tion Equip Ment

    Re- applying the mag net af ter ninety sec onds in the cali bra tion mode (see “4.1 Cali bra - will re turn the Model S214 to nor mal op era - tion”, page 11). tion us ing the pre vious set of cali bra tion val - ues.

  • Page 17: Test Gas Mode

    5% of full scale. fig ure 16 If the Model S214 is placed in the test gas mode and no gas is ap plied for twelve min - utes, the unit will re vert to a fault con di tion (see sec tion 4.5 Fault Codes &...

  • Page 18: Digi Tal Dis Play Codes

    NOT USED Calibration check period The Model S214 has self- diagnostics in cor po - exceeded rated into the mi cro proc es sor’ s pro gram. If a fault is de tected, the out put sig nal will drop to 0mA and a Fault code will be dis played.
  • Page 19 GENERAL MONITORS Model S214 Op era tion Fault Codes & Their Reme dies ( con tin ued The Fault Codes are: F3 = Low re sponse dur ing cali bra tion F1 = High re sponse dur ing cali bra tion...
  • Page 20 The maxi mum ca ble re sis tance which the Model S214 can tol er ate is 10 ohms per con - duc tor (20 ohms loop) at +24 VDC mini mum.

  • Page 21: Ap Pen Dix

    0 to 100ppm, 0 to 50pm and 0 to 20ppm Accuracy: Recommend Three Wire Shielded Cable: +2ppm or +10% of applied gas, whichever Maximum distance between the Model S214 is greater, in ambient conditions ( when the and the power source.

  • Page 22: Environmental Specifications

    GENERAL MONITORS Model S214 Ap pen dix Speci fi ca tions (cont’ d) Electrical Specifications 5.1.4 Environmental Specifications (cont’ d) interfacing with input Operating Temperature Range: impedance devices, the following maximum -40°F to 140°F cable lengths apply, with respect to the -40°C to 60°C...

  • Page 23: En Gi Neer Ing Docu Men Ta Tion

    GENERAL MONITORS Model S214 Ap pen dix 5.2 En gi neer ing Docu men ta tion 5.2.1 Termination & Outline Drawings fig ure 17...
  • Page 24 GENERAL MONITORS Model S214 Ap pen dix fig ure 18...

  • Page 25: Ter Mi Na Tion Draw Ing - Ce Mark

    GENERAL MONITORS Model S214 Ap pen dix 5.2.2 Termination Drawing CE Marked Units fig ure 19...

  • Page 26: Or Der Ing In For Ma Tion

    Model S214 Ap pen dix 5.3 Or der ing In for ma tion S214 - 3 0 0 - 0 0 0 - 0 0 0 Cali bra tion Sig nal: 1 = 1.5mA Sig nal.....stan dard 2 = 0.0mA Sig nal...

  • Page 27: Fmrc Ap Proval

    (although they have not been transmitter may be connected and which verified as part of a Model S214 system): processes the electronic signal for the eventual end use. In order to maintain an...

  • Page 28: Cali Bra Tion Sched Ule For Prob Lem En Vi Ron

    GENERAL MONITORS Model S214 Ap pen dix 5.5 Cali bra tion Sched ule for Prob lem En vi ron ments Sensor Serial Number: Location: 1) Installation and preliminary calibration. Record date after preliminary calibration is performed: Date 2) 24 hour calibration. Record date after 24 hour calibration is performed: Date 3) 7 day calibration check (Record date and reading of calibration check.

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