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General Monitors MAN2280A Скачать руководство пользователя страница 34

Model 2280A

28

5.0 Troubleshooting

5.1 General

It is highly recommended that a spare sensor be on hand at all times. Sensor failure
tends to be one of the potential causes of real downtime. A full complement of other GMI
recommended spare parts should also be on hand. (Please refer to Section 7.4.3).

In the event the system is to have less than four active channels, the sensor should be
substituted with a sensor simulator for each unused channel. Otherwise, the unused
channel will be in fault condition (sensor failure). It is recommended that defective
controllers be returned to the factory for repair, even if the warranty has expired.

5.2 Troubleshooting Table

The information presented in the following table is designed to correct the more common
problems, which appear during system startup and operation. Should the various actions
suggested in the table fail to restore normal operation, we recommend that the factory
be consulted and, if necessary, that the system be returned to the factory for repair.

This section is intended to be a guide in correcting problems that may arise in the field.
This section is not all-inclusive, and General Monitors should be contacted for
assistance, if the corrective actions listed do not eliminate the problem. If equipment or
qualified personnel required for various tests is not available, it is recommended that the
defective unit be returned to General Monitors for repair. A complete written description
of the problem should be included.

NOTE:

If the equipment is under warranty, any repairs performed by persons other than

General Monitors’ authorized personnel may void the warranty. Please read the
warranty statement carefully.

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Содержание MAN2280A

Страница 1: ...osed 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 08 07 General Monitors reserves the right to change published specifications and designs without prior notice MAN2280 Part No MAN2280A Revision D 08 07 ...

Страница 2: ...This page intentionally left blank ii ...

Страница 3: ... of Gas Emission 8 2 6 2 Environmental Factors 8 2 6 3 Film Degradation 8 2 7 Sensor Installation 9 2 8 Alarm Wiring Connections 13 2 9 Multiple Controller Operation 14 3 0 START UP AND OPERATION 17 3 1 Types of User Interfaces 17 3 2 Initial Application of Power 18 3 3 Resetting Latched Alarms 18 3 4 Analog Output 18 3 5 Calibration Preparation Instructions 19 3 5 1 Gas Application Options 19 3 6...

Страница 4: ...APPENDIX 31 7 1 Warranty 31 7 2 Sensor Operating Principle 31 7 3 General Specifications Controller 33 7 3 1 Mechanical Specifications 33 7 3 2 Environmental Specifications 33 7 3 3 Electrical Specifications 33 7 3 4 System Specifications 33 7 4 General Specifications Sensor 33 7 4 1 System Specifications 33 7 4 2 Environmental Specifications 33 7 4 3 Recommended Spare Parts List 34 7 5 Sample Cal...

Страница 5: ...Protection Circuit for Relay Contacts 14 Figure 5 Common Relay Rear Terminal Connections 15 Figure 6 Discrete Relay Rear Terminal Connections 16 Figure 7 Front Panel Display 17 Figure 8 Portable Purge Calibrator 20 Figure 9 Panel Assembly Panel Mount 98 Ref 10199C 38 Figure 10 Interconnection Drawing Zone Control Model 2280A Controller 39 ...

Страница 6: ...e 3 Sensor Cable Colors 10 Table 4 Cable Length 11 Table 5 De Energized Alarm Relay Contacts 13 Table 6 Energized Alarm Relay Terminations 13 Table 7 High Alarm Set Points 24 Table 8 Setup Display Options 25 Table 9 Troubleshooting Table 29 Table 10 Spare Parts List 34 Table 11 Calibration Schedule 35 ...

Страница 7: ...ontains components which can be damaged by static electricity Special care must be taken when wiring the system to ensure that only the connection points are touched General Monitors cautions as with all equipment of this type that high levels or long exposure to certain atmospheres will degrade the sensor and eventually affect sensitivity Please refer to Section 2 6 3 for specific information Use...

Страница 8: ...for misuse of General Monitors gas detection systems The system s full two year warranty will be voided if customer personnel or third parties damage the system during repair attempts Customer Support For additional product information not contained in this manual please contact General Monitors Customer Support For contact information see Section 6 1 ...

Страница 9: ...ved from earlier GMI systems which have an established reputation for reliable performance By carefully following the instructions in this manual you can be assured of the most dependable continuous protection against hazardous accumulation of hydrogen sulfide gas Except for periodic calibration checks there are no routine maintenance requirements The Model 2280A Controller is a microprocessor bas...

Страница 10: ...uts of four sensors The sensors are monitored independently i e they are not scanned nor are the signals summed Each channel has the following LED indicators for High Low Fault Calibration and Setup Mode Button accessed by using a small screw driver Digital Display in ppm High Low and Fault relays NOTE Standard configuration is common relay ...

Страница 11: ...lid forward for servicing This service loop is a definite advantage when replacing or changing a controller 1 4 Sensor Assembly Four sensor assemblies are normally supplied with the system These assemblies are comprised of the sensor the sensor housing and an optional splashguard NOTE This sensor assembly is CSA approved for Class I Division 1 and Division 2 Groups B C D hazardous areas ...

Страница 12: ... RFI resistant do not mount the controller in close proximity to radio transmitters or similar equipment Care should be taken to assure adequate ventilation Do not mount the controller in a manner that restricts the natural convection airflow from normal ambient air The controller operating temperature range is 0 C to 60 C 32 F to 140 F 2 2 Power Connections The Model 2280A operates on a nominal l...

Страница 13: ...hat a Lead Acid type battery be used This type of battery can be expected to last for several years with minimum maintenance The customer furnished battery may be connected as shown in Figure 2 No manual or relay switching is required In order to keep the 24V lead acid battery whose voltage is approximately 27VDC when fully charged continuously charged through the series diode a regulated 28VDC po...

Страница 14: ...not be larger than an AWG 14 wire 2 6 Choosing Sensor Locations There are no hard and fast rules governing the selection of sensor locations The customer must evaluate conditions at their own facility to make this determination However the following general suggestions should be considered with regard to particular conditions at the site where a Model 2280A is being installed 2 6 1 Likely Sources ...

Страница 15: ...uch applications the normal two year warranty does not apply CAUTION General Monitors discourages the painting of sensor assemblies If the sensor head is painted over gas will not be able to diffuse into the sensor and many paints contain lead which can poison a sensor 2 7 Sensor Installation The standard sensor assembly consists of a sensor housing GMI P N 10252 1 and sensor P N 50445 1 5 or 9 Fi...

Страница 16: ...e cable to the sensor 1 Remove the P N 10252 1 housing lid to reveal the terminal strip The sensor is connected in the housing according to color designations as follows Sensor Housing Terminal Number Sensor Wire Color 1 White 2 Black 3 Red 4 Green Table 2 Sensor Wire Colors 2 Install the sensor assembly with conduit in hazardous areas A good design would include conduit seals to prevent water bui...

Страница 17: ...lator for each unused channel Otherwise the unused channel will be in Fault condition sensor failure NOTE If sensors were matched with a specific channel at the factory each one will be tagged accordingly Check and match each sensor to the proper channel before installing it Two accessories are available which can be supplied with the system if ordered Splash Guard P N 10395 1 Test Gas Applicator ...

Страница 18: ...Model 2280A 12 Figure 3 Junction Box Assembly Sensor ...

Страница 19: ...act is SPDT single pole double throw 4 amps at 115 VAC resistive These contacts are brought out to terminals on the rear of the controller as follows CONTACT CONDITION ALARM RELAY OPEN COM CLOSED Fault 2 C 1 Low Alarm 2 3 C 1 4 High Alarm 2 3 C 1 4 Table 5 De Energized Alarm Relay Contacts The above chart shows the High and Low alarm contacts in the standard de energized state with power applied T...

Страница 20: ...lay Contacts 2 9 Multiple Controller Operation Up to sixteen points of gas detection utilizing one set of alarm relays may be configured by interconnecting the H and M terminals of TB2 at the rear of four Model 2280A controllers Each Specific terminal such as the H terminal is connected from controller to controller using 20AWG wire or larger The controllers must be installed adjacent to each othe...

Страница 21: ...Model 2280A 15 Figure 5 Common Relay Rear Terminal Connections ...

Страница 22: ...Model 2280A 16 Figure 6 Discrete Relay Rear Terminal Connections ...

Страница 23: ...ation at the sensor site fault diagnostic codes calibration prompts and setup parameters The status indicators provide the user with an indication of the current mode of operation HIGH High alarm LOW Low alarm FAULT CAL Calibration or Calibration Check modes and SETUP Setup and Setup Check modes Mode button provides the user access to the Calibration Calibration Check Setup and Setup Check modes T...

Страница 24: ...r non latching alarm output for High and or Low alarms If an alarm output activates and the condition that caused that activation is no longer present a non latching alarm output resets automatically A latched alarm output needs to be reset manually Resetting latched alarm outputs is done with the Reset button located on the Channel 1 board Pressing the Reset button resets any latched conditions t...

Страница 25: ...ensor from the bottle After each use of the field calibrator bottle clear the bottle of residual H2S gas by flushing it with clean air 3 5 1 Gas Application Options 3 5 1 1 Breaker Bottles and Ampoules General Monitors offers ampoules with breaker bottles as a method of reliably introducing calibration gas to the Model 2280A The ampoule is placed inside the breaker bottle into the breaker slot and...

Страница 26: ...0A has had power applied for at least 24 hours to ensure that the metal oxide film of the sensor has stabilized Make sure the sensor is seeing clean air Figure 8 Portable Purge Calibrator To Use the Portable Purge Calibrator 1 Place the calibration cup over the sensor 2 Apply the gas by opening the ON OFF valve on the cylinder 3 Allow the sensor to see the gas for1 to 2 minutes NOTE Do not store t...

Страница 27: ...st gas This response time may increase due to the presence of the Dust Guard Splash Guard or other sensor accessories 5 If the sensor does see the gas the read out on the display flashes for as long as the unit remains in the Calibration Check mode The operator should compare the reading with the gas concentration applied and determine if it is necessary to calibrate the sensor 6 Remove the gas an...

Страница 28: ...tion 1 Wait until AC displays Calibration cannot be aborted when is flashing 2 Press the Mode button and hold it for approximately 5 seconds Release the button after the calibration level displays 3 The channel returns to normal operation 3 8 Setup and Setup Check modes The Setup Check mode allows the operator to view the selected options for the module without allowing any changes to be made Once...

Страница 29: ...ds more 3 When the SETUP LED stops flashing and stays on release the Mode button and the unit enters the Setup mode 3 8 1 Entering the Password This option applies to the Setup mode only If the Password option is enabled the right digit of the display is blank and a 0 appears in the left digit on the display Press the Mode button until the first number of your password displays and then wait about...

Страница 30: ... flashes while the energized de energized option displays This option is available only for discrete alarms configuration The display indicates the current selection En or dE Press the Mode button to toggle the selection De Energized dE is the factory default for this selection The Low LED on the front panel flashes while the latching non latching option is displayed The display will indicate the ...

Страница 31: ...urrent status condition of each channel 3 9 Setup Mode Selection Table This section helps the operator make selections during the Setup mode It is recommended that the operator fill in the selections in the proper blanks and then use this page as a reference while programming the Model 2280A The table shown below indicates the order of options in the Setup mode To the right of the option is a desc...

Страница 32: ...r mud or dirt accumulation or adverse gases more frequent calibration is recommended The exact frequency can vary with the severity of conditions and must be established in the field 3 10 2 Replacing a Sensor When a sensor is replaced the new sensor must be calibrated To avoid false alarms GMI recommends disabling all the alarm circuits until the sensor is calibrated For better results the sensor ...

Страница 33: ... heads accidental painting over of sensors etc A calibration check is defined as the procedure of applying a known concentration of gas to the system sensors while observing the controller The visual display will indicate the gas concentration and alarm indicators circuits will activate in direct relationship to gas concentration Calibration adjustments must be made if results vary Section 3 7 4 2...

Страница 34: ...he more common problems which appear during system startup and operation Should the various actions suggested in the table fail to restore normal operation we recommend that the factory be consulted and if necessary that the system be returned to the factory for repair This section is intended to be a guide in correcting problems that may arise in the field This section is not all inclusive and Ge...

Страница 35: ...curs remove the gas and expose the sensor to clean air for at least five minutes Then attempt another calibration If the second attempt fails replace the sensor If this fault continues to occur after the sensor has been replaced consult the factory or your GMI Representative F3 Software Checksum Error This fault occurs during initial power up of the unit If this fault occurs remove and reapply pow...

Страница 36: ...98 Email info generalmonitors co uk IRELAND Ballybrit Business Park Galway Republic of Ireland Phone 353 91 751175 Fax 353 91 751317 Email service gmil ie SINGAPORE No 2 Kallang Pudding Rd 09 16 Mactech Building Singapore 349307 Phone 65 6 748 3488 Fax 65 6 748 1911 Email genmon singnet com sg MIDDLE EAST LOB12 G20 P O Box 61209 Jebel Ali Dubai United Arab Emirates Phone 971 4 8815751 Fax 971 4 88...

Страница 37: ...tated herein are in lieu of all obligations or liabilities on the part of General Monitors for damages including but not limited to consequential damages arising out of or in connection with the performance of the product 7 2 Sensor Operating Principle GMI s sensor is a solid state continuous diffusion type element The sensor uses the ability of Hydrogen Sulfide to strongly and significantly adsor...

Страница 38: ...ignal tracks the digital reading as well The adsorption process is reversible so that when the air containing no H2S diffuses into the sensor the H2S gas desorbs The semiconductor then resumes its original clean air resistance value ...

Страница 39: ... 0 21 7 mA 300 Ohm maximum load Accuracy 5 1 5 20mA 7 3 4 System Specifications Digital Readout 0 20 0 50 or 0 99 ppm Accuracy 2 or 10 of applied gas whichever is greater Electrical Classification General purpose non hazardous indoors Warranty Two years Approvals CSA 7 4 General Specifications Sensor 7 4 1 System Specifications Type Continuous diffusion adsorption type Response Time T50 1 minute w...

Страница 40: ...Model 2280A 34 7 4 3 Recommended Spare Parts List Qty Description Part Number 2 Fuse 8 amp 250 VAC 951 012 2 Fuse 3 15 amp 250 VAC 951 213 1 Sensor Per Original Order Table 10 Spare Parts List ...

Страница 41: ...o to step 5 Date Reading Date Reading Date Reading ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ 5 30 day calibration check Record date and reading of calibration check Repeat after 30 days if reading deviates more than 20 or 2 ppm whichever is greater Otherwise go to step 6 Date Reading Date Reading Date Reading ____ ____ _...

Страница 42: ...ZED 8 RS 8NC NON LATCH ALARM LATCH WARN ENERGIZED C H2S SENSOR 00 NONE No Sensor 0 5 Lbs 01 STD 50445 1 Sensor Al 0 to 100 PPM H2S 0 5 Lbs 02 50445 5 Sensor Al 0 to 50 PPM H2S 0 5 Lbs 03 50445 9 Sensor Al 0 to 20 PPM H2S 0 5 Lbs 04 50448 1 Sensor SS 0 to 100 PPM H2S 0 5 Lbs 05 50448 5 Sensor SS 0 to 50 PPM H2S 0 5 Lbs 06 50448 9 Sensor SS 0 to 20 PPM H2S 0 5 Lbs 07 50454 1 Sensor PTB AL 0 to 100 P...

Страница 43: ...tion Bottle 1 0 Lbs Two Active Channels 9 4 Lbs 2X Cal Kit Refill 4 Ea 20 50 1 0 7 Lbs 2X H2S sensor simulator w o SW 0 5 Lbs 2X Sensor Housing 3 0 Lbs 2X Calibration Bottle 1 0 Lbs Three Active Channels 12 6 Lbs 3X Cal Kit Refill 4 Ea 20 50 1 0 7 Lbs 1X H2S sensor simulator w o SW 0 5 Lbs 3X Sensor Housing 3 0 Lbs 1X Calibration Bottle 1 0 Lbs 4 STD Four Active Channels 15 8 Lbs 4X Cal Kit Refill...

Страница 44: ...Model 2280A 38 7 6 1 Panel Assembly Panel Mount 98 Ref 10199C Figure 9 Panel Assembly Panel Mount 98 Ref 10199C ...

Страница 45: ...Model 2280A 39 7 6 2 Interconnection Drawing Zone Control Model 2280A Controller Figure 10 Interconnection Drawing Zone Control Model 2280A Controller ...

Страница 46: ...ber states shall dispose according to WEEE regulations For further General Monitors product WEEE disposal information please visit www generalmonitors com customer_support faq_general html All other countries or states please dispose of in accordance with existing federal state and local environmental control regulations ...

Страница 47: ...et point 24 Inductive loads 14 introduction 1 latching non latching 18 low set point 24 mode button 17 Mounting 6 password enabled disabled option 23 Periodic Calibration Checks 27 polycarbonate inlay 3 portable purge calibrator 19 recommended spare parts list 34 replacing a sensor 26 reset button 17 RFI resistant 6 screen parts 1 semi conductor 31 Sensor Assemblies 5 sensor failure 28 sensor hous...

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