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Model S216A

Three Relay Smart Sensor

for Hydrogen Sulfide

Gas Applications

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 05/97

General Monitors reserves the right to
change published specifications and designs
without prior notice.

Part No. MANS216A
Revision C/05-97

Model S216A

General Monitors

Содержание S216A

Страница 1: ...is document may be used and disseminated only for the purposes and to the extent specifically authorized in writing by General Monitors Instruction Manual 05 97 General Monitors reserves the right to change published specifications and designs without prior notice Part No MANS216A Revision C 05 97 Model S216A General Monitors ...

Страница 2: ...approval or which have been subjected to neglect accident improper installation or application or on which the original identification marks have been removed or altered Except for the express warranty stated above General Monitors disclaims all warranties with regard to the products sold including all implied warranties of merchantability and fitness and the express warranties stated herein are i...

Страница 3: ...anytime the system power is off for more than an hour ...

Страница 4: ...ode 4 3 Calibration Mode 4 4 Calibration Equipment 4 5 Program Review Mode 4 6 Relay Options Mode 4 7 Digital Display Codes 4 8 Fault Codes Their Remedies 5 0 Appendix 5 1 Specifications 5 1 1 System Specifications 5 1 2 Mechanical Specifications 5 1 3 Electrical Specifications 5 1 4 Environmental Specifications 5 2 Engineering Documentation 5 2 1 Termination Outline Drawings 5 2 2 Termination Dra...

Страница 5: ...ection Figure 14 Input Power Connections Figure 15 GMI Logo and Display Window Drawing Figure 16 Display Diagram Different Modes Figure 17 Display Diagram Calibration Sequence Figure 18 CAL Bottle Ampoule Diagram Figure 19 Hydrogen Sulfide Portable Purge Calibrator Figure 20 Display Diagram Energized De Energized Figure 21 Display Diagram Latching Non Latching Figure 22 Display Diagram Set Points ...

Страница 6: ...an analog signal One Person Single Point Calibration initiate the calibration sequence with a magnet apply the gas and wait for the display to indicate that the unit has completed the calibration No tools or adjustments are required Digital Display indicates gas concentrations fault codes calibration cues and is used for selecting relay options 4 to 20 mA Output transmits fault over range calibrat...

Страница 7: ...2 General Monitors ...

Страница 8: ...onverted to a digital signal and sent to the microprocessor to be processed The process of H2S adsorbing onto the MOS film is most effective at an elevated temperature On the outer edge of the substrate is a heater ring The temperature of this heater ring is measured with a thermistor and kept constant by a circuit located inside the body of the sensor figure 2 As H2S adsorbs onto the film electro...

Страница 9: ... Warn Set Points and Relay Option Selection Modes While the unit is in the Test Gas Mode the MPU will fix the 4 20mA output signal to 1 5mA The optional 0mA output signal is for the calibration mode only Calibration Mode When the unit is placed in this mode the MPU will look at the signal from the sensor and determine when to accept the calibration value This value is stored in the EEPROM and is u...

Страница 10: ...n Latching Set Point The Alarm Warn Set Points can be selected in increments of 5 parts per million for 0 to 100ppm and 0 to 50ppm ranged sensors and in increments of 2 parts per million for 0 to 20ppm ranged sensors NOTE Once the Warn Alarm Set Points and Relay Options have been selected the unit will revert to the calibration sequence and must be calibrated Model S216A Sensor Assembly 5 ...

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Страница 12: ...aminating substances Although the Model S216A is RFI resistant it should not be mounted in close proximity to radio transmitters or similar equipment Other considerations when placing sensors should include l Locate the Model S216A where prevailing air currents contain the maximum concentration of gas l Locate the Model S216A near possible sources of gas leaks l Observe the Model S216A s temperatu...

Страница 13: ...gure 6 25 should be used when making installation determinations A complete list of the mechanical specifications can be found in section 5 1 2 figure 6 To prevent possible corrosion due to moisture or condensation it is recommended that the conduit connected to the Model S216A housing be sealed or contain a drain loop figure 7 figure 7 Each conduit run from a hazardous location to a non hazardous...

Страница 14: ...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 complete system including all alarm circuitry be tested at least annually Some typical items to check during maintenance examinations are l The sensor mounting to see it is secure l The cable connections for tightness and possible...

Страница 15: ... 7 Normally Open 8 Common 9 Normally Closed The Fault Relay is always Normally Energized and Non Latching Inductive loads bells buzzers relays etc on dry relay contacts must be clamped down figures 9 and 10 Unclamped inductive loads can generate voltage spikes in excess of 1000 volts Spikes of this magnitude may cause false alarms and contact damage figure 9 figure 10 NOTE Contact with PCB compone...

Страница 16: ...ovides for a control room or other location remote to the Model S216A to display operation and alarm conditions To connect the 4 to 20mA output signal with another unit connect the white wire to TB1 position 1 CE Mark units TB4 position 1 labeled 4 20 mA OUT For making output signal connections to display devices refer to the specific manual for that device figure 13 figure 13 If a device other th...

Страница 17: ...nnect the red wire to TB1 position 5 CE Mark units TB4 position 2 labeled 24VDC Connect the black wire to TB1 position 4 CE Mark units TB4 position 3 labeled COM figure 14 3 5 Applying Power Before applying power to the system for the first time all wiring connections should be checked for correctness and the housing cover replaced At the initial application of power or after a fault condition has...

Страница 18: ...olts to a torque setting of 50 inch pounds or by using a feeler gauge to ensure the gap between the cover and the housing is less than 0015 inch 038mm There are four entry holes one each on the left and right sides and two on the bottom of the Model S216A housing Three of these holes are dedicated for the sensor the reset switch and conduit Each hole is tapped for 3 4 NPT threads If a particular e...

Страница 19: ...General Monitors 14 ...

Страница 20: ...ed to the sensor l Calibration Mode This user initiated mode allows the Model S216A to be field calibrated l Program Review Mode This user initiated mode allows the selected relay options to be viewed on the display l Relay Options Mode This user initiated mode allows the relay options to be selected To activate the magnetic switch place the magnet over the GMI Logo on the cover of the Model S216A...

Страница 21: ...ance the unit can immediately be placed in the Calibration mode by applying the magnet to the General Monitors Logo on the lid of the Model S216A 4 3 Calibration Mode Activating the Calibration Switch will automatically disable the alarm circuits by sending a 1 5mA 0 0mA is optional analog output current to the control room display module This will prevent activation of the relay contacts when usi...

Страница 22: ...eek The Model S216A can be returned to normal operation if the magnet is re applied after ninety seconds of initiating the calibration sequence If the Model S216A is placed in the calibration mode and no gas is applied for twelve minutes the unit will revert to a fault condition Placing the magnet over the GMI Logo again will return the unit to the calibration mode Re applying the magnet after nin...

Страница 23: ...nsor Range type 50 of Full Scale 0 to 100 ppm 1 50 ppm 0 to 50 ppm 5 25 ppm 0 to 20 ppm 9 10 ppm values given in parts per million NOTE General Monitors recommends using ampoules for calibrating H2S gas detection instruments The H2S Portable Purge Calibrator is available for applications where a calibration method of flowing H2S gas to the sensor might provide a better calibration source e g high ...

Страница 24: ...equence by placing the magnet over the GMI Logo on the cover of the unit l When the letters AC appear in the display window remove the magnet and apply the calibration gas 50 of full scale by opening the valve on the cylinder l When the sensor begins to see the gas the display will change from AC to CP to indicate Calibration in Progress l When the calibration sequence is complete the display will...

Страница 25: ...display will indicate nL l The Alarm set point will be displayed as a number in parts per million ppm 4 6 Relay Options Mode The Relay Options Mode allows the operator to select modify the Warn and Alarm relay output options in the field without de classifying the area The relay options that can be selected modified are l Warn Relay Energized De Energized l Warn Relay Latching Non Latching l Warn ...

Страница 26: ... of 5 Units with a 0 to 50ppm detection range can have a Warn Set Point be tween 5 and 45 in increments of 5 Units with a 0 to 20ppm detection range can have a Warn Set Point between 2 and 18 in increments of 2 If the desired Warn set point is higher than the current Alarm set point it will be necessary to set the Alarm set point then re enter the Setup Mode to set the Warn set point figure 22 l A...

Страница 27: ...etween the Warn Set Point and 18 in increments of 2 If the desired Warn set point is higher than the current Alarm set point it will be nec essary to set the Alarm set point then re enter the Setup Mode to set the Warn set point After the relay options have been selected the unit will revert to the Calibration Mode and the unit must be calibrated If the unit is not calibrated the relay option sele...

Страница 28: ... CP Calibration in Progress CC Calibration is Complete Pr Program Review En Energized Relay Option dE De Energized Relay Option LA Latching Relay Option nL Non Latching Relay Option 1 2 3 etc Alarm Set Point or Over range F1 High response during calibration F2 Failed to complete the calibration F3 Low response during calibration F4 Sensor Heater is Open Circuited F5 Sensor Heater is Short Circuite...

Страница 29: ... by the microprocessor When a calibration fault F1 F2 F3 has occurred and has been corrected the unit will automatically revert to the calibration process and the unit must be re calibrated If a fault other than a calibration fault occurs and is corrected the unit will return to normal operation F1 High response during calibration This fault may occur for one of the following reasons l Incorrect g...

Страница 30: ...he leads The maximum cable resistance which the Model S216A can tolerate is dependent on the supply voltage see Section 5 1 3 Electrical Specifications A maximum of 10 ohms per conductor 20 ohms loop at 24 VDC minimum F7 EEPROM Verification Failure This fault occurs during calibration when an attempt to verify the calibration parameter just written to the non volatile memory fails The usual cause ...

Страница 31: ...26 General Monitors ...

Страница 32: ...ith full scale concentration applied Performance Standard General Monitors Model S216A Smart Sensor meets the ISA S12 15 Part I Performance Standard for Hydrogen Sulfide Gas Detection Instruments when the recommended initial power up calibration sequences are performed 5 1 2 Mechanical Specifications Weight approx 5 5 lbs 2 5 kg Length 6 34 161 mm Height w bolts 3 40 86 mm Width at the base 4 10 1...

Страница 33: ... to the Analog Signal The total loop resistance can be no greater than 300 ohms AWG Feet Meters 22 1600 488 20 2400 730 18 3800 1160 16 5200 1585 14 9000 2740 NOTE Good design practices dictate cable lengths conservatively shorter than the maximum given values 5 1 4 Environmental Specifications Operating Temperature Range 40 F to 140 F 40 C to 60 C Storage Temperature Range 31 F to 131 F 35 C to 5...

Страница 34: ...29 Model S216A Appendix fig ...

Страница 35: ...5 2 Engineering Documentation 5 2 1 Termination Outline Drawings 30 Appendix General Monitors fig ...

Страница 36: ...Termination Drawing Engineering Documentation continued Outline Dimensional Drawing 31 Model S216A Appendix fig ...

Страница 37: ...0445 9 Aluminum Body 20ppm 4 50448 1 Stainless Steel Body 100ppm 5 50448 5 Stainless Steel Body 50ppm 6 50448 9 Stainless Steel Body 20ppm 7 50454 1 PTB Aluminum Body 100ppm 8 50454 5 PTB Aluminum Body 50ppm 9 50454 9 PTB Aluminum Body 20ppm 10 50457 1 PTB Stainless Steel Body 100ppm 11 50457 5 PTB Stainless Steel Body 50ppm 12 50457 9 PTB Stainless Steel Body 20ppm l Active Channels 0 Controller ...

Страница 38: ... MOS Sensor 0 to 100 ppm l 50445 5 Aluminum Body H2S Gas Specific MOS Sensor 0 to 50 ppm l 50445 9 Aluminum Body H2S Gas Specific MOS Sensor 0 to 20 ppm l 50448 1 Stainless Steel Body H2S Gas Specific MOS Sensor 0 to 100 ppm l 50448 5 Stainless Steel Body H2S Gas Specific MOS Sensor 0 to 50 ppm l 50448 9 Stainless Steel Body H2S Gas Specific MOS Sensor 0 to 20 ppm The following apparatus have been...

Страница 39: ... calibration check Record the date and reading of calibration check Repeat after 14 days if reading deviates more than 4ppm or 20 whichever is greater Otherwise go to step 5 Date Reading Date Reading Date Reading 5 30 day calibration check Record the date and reading of calibration check Repeat after 30 days if reading deviates more than 4ppm or 20 whichever is greater Otherwise go to step 6 Date ...

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