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- RAEGuard EC
- User Manual
Rae RAEGuard EC User Manual
Summary of RAEGuard EC
Page 1
Raeguard s ec toxic gas and oxygen transmitter raeguard s lel combustible gas transmitter raeguard s ir non-dispersive infrared (ndir) transmitter user’s guide p/n 033-4117-e00 rev a august 2009.
Page 2: - Read Before Operating -
Raeguard s ec / lel / ir user’s guide - read before operating - this manual must be carefully read by all individuals who have or will have the responsibility of using, maintaining, or servicing this product. The product will perform as designed only if it is used, maintained, and serviced in accord...
Page 3: Contents
Raeguard s ec / lel / ir user’s guide contents 1. General information......................................................................... 3 1.1 general specifications............................................................... 6 raeguard s ec specifications .....................................
Page 4: 1. General Information
Raeguard s ec / lel / ir user’s guide 1. General information raeguard s ec the raeguard s ec is a fixed electrochemical detector for oxygen and toxic gas (co, h 2 s, so 2 , no, no 2 , cl 2 , o 2 , clo 2 , nh 3 , ph 3 , hcn and eto). It operates with voltages from 9 to 36 vdc and provides an analog (...
Page 5: Key Features:
Raeguard s ec / lel / ir user’s guide key features: • interchangeable smart electrochemical sensor that can be calibrated offline • 4 to 20ma analog output signal. • rs-485 digital communication in modbus protocol • explosion-proof stainless-steel enclosure for hazardous environment applications • m...
Page 6: Models:
Raeguard s ec / lel / ir user’s guide hazardous location classification: atex: ii 2g ex d iic t6 -40° c amb complies with en60079-0 :2004, en60079-1 :2004 example of name plate on raeguard s models: notes: sensor name is replaced by the actual sensor name. Fgm-1xxxs is replaced by model number. * **...
Page 7: 1.1 General Specifications
Raeguard s ec / lel / ir user’s guide 1.1 general specifications raeguard s ec specifications size 7.4" l x 5.9" w x 4.3" h 188mm x 150mm x 109mm weight 7.7 lbs 3.5 kg detector off-line pre-calibrated interchangeable smart electrochemical sensor calibration 2-point calibration certification atex: ii...
Page 8: Raeguard
Raeguard s ec / lel / ir user’s guide raeguard s ir specifications size 6.6” l x 5.9” w x 4.3” h 168mm x 150mm x 109mm weight 7.7 lbs or 3.5 kg detector protected, off-line pre-calibrated, interchangeable smart ndir sensor calibration 2 point calibration range co 2 ： 0 to 50000 ppm ch 4 ： 0 to 100% ...
Page 9: Raeguard
Raeguard s ec / lel / ir user’s guide raeguard s ir default sensor settings gas range resolution span gas carbon dioxide (co 2 ) 0 to 50,000 ppm 10 ppm or 1000 ppm 2000 ppm to 10000 ppm methane (ch 4 ) 0 to 100% lel 1% lel 20% lel to 99% lel note: when co 2 co 2 >10000, the lcd displays x.Xe4 (which...
Page 10: Raeguard
Raeguard s ec / lel / ir user’s guide raeguard s lel specifications size 6.6” l x 5.9” w x 4.3” h 168mm x 150mm x 109mm weight 7.7 lbs or 3.5 kg detector protected, off-line pre-calibrated, interchangeable catalytic bead smart lel sensor calibration 2 point calibration range 0 to 100% lel resolution...
Page 11: 2. Operation
Raeguard s ec / lel / ir user’s guide 2. Operation the calibration of all newly purchased rae systems instruments should be tested by exposing the sensor(s) to a known concentration calibration gas before the instrument is used or put into service. For maximum safety, the accuracy of the raeguard s ...
Page 12: 2.1 Physical Description
Raeguard s ec / lel / ir user’s guide 11 2.1 physical description the design of raeguard s allows it to be easily mounted and interfaced to a fixed-point gas monitoring system. The raeguards ec and lel are housed in a 7.4" l x 5.9" w x 4.3" h (188mm x 150mm x 109mm) case with two holes 5.25" (133 mm...
Page 13: Warning
Raeguard s ec / lel / ir user’s guide 2.2 installation and access instructions warning 1. A minimum of 18" (457mm) of explosion-proof conduit must be used at cable entry in group a and b atmospheres. Csa requires seals in conduit exceeding 5' (1.524 m) in group c atmospheres. 2. To prevent ignition ...
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Raeguard s ec / lel / ir user’s guide instrument assembly removal (ec and lel) prior to service: make sure power is off. Observe all hazardous location safety procedures. 1. Unscrew the housing lid from the housing body by rotating it counter- clockwise. As shipped, one of the conduit holes is cover...
Page 15
Raeguard s ec / lel / ir user’s guide instrument assembly removal (ir) prior to service: make sure power is off. Observe all hazardous location safety procedures. 1. Unscrew the housing lid from the housing body by rotating it counter- clockwise. As shipped, one of the conduit holes is covered by th...
Page 16: Electrical Wiring
Raeguard s ec / lel / ir user’s guide electrical wiring 1. Inside the housing bottom, unplug the two green terminal block plugs from the terminal block on the pc boards. Note: the terminal block plugs accept 12 awg to 24 awg wire. 2. Lace the wires through the raeguard s ec’s wire hole(s) and connec...
Page 17: Earth Grounding Instructions
Raeguard s ec / lel / ir user’s guide earth grounding instructions external earth grounding fasten the crimped ground wire with hardware as illustrated below. The wire should have a minimum cross-section area of 4mm 2 for its conductor. Wire (min. 4 mm 2 cross-section) crimped terminal m4 flat washe...
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Raeguard s ec / lel / ir user’s guide finished grounding wires internal and external grounding are shown here, as well as an alternate external grounding point. Always follow local electrical guidelines. External earth grounding internal earth grounding alternate grounding point 17.
Page 19: User Interface
Raeguard s ec / lel / ir user’s guide 2.3 display and user interface user interface the raeguard s ec’s user interface consists of four status leds, a 4- digit lcd display, and three keys, [+], [mode], and [-]. The three keys are operated by using the magnet key. Raeguard s ec user interface. Magnet...
Page 20: Using The Magnet Key
Raeguard s ec / lel / ir user’s guide using the magnet key using the magnet end of the magnet key, briefly touch the glass above the mode circle or the triangles labeled [+] and [-]. Then remove the key straight out and away from the raeguard s ec. Raeguard magnet key touching glass above the [+] tr...
Page 21: Reading Display
Raeguard s ec / lel / ir user’s guide reading display as the transmitter enters the reading display, it automatically starts testing for errors and goes through a cycle of checking each alarm condition. If there are no errors or alarm conditions, the green “ok” led is lit and the gas concentration i...
Page 22: 2.4 Calibration
Raeguard s ec / lel / ir user’s guide 2.4 calibration warning the calibration of all newly purchased rae systems instruments should be tested by exposing the sensor(s) to a known concentration calibration gas before the instrument is used or put into service. For maximum safety, the accuracy of the ...
Page 23: Zero Calibration
Raeguard s ec / lel / ir user’s guide zero calibration 1. Connect the zero gas cylinder to the metal filter gas adapter on the raeguard s transmitter using the provided calibration adapter. 2. To access the calibration menu, press [mode] from the reading display. Zero calibration appears first, as i...
Page 24: Span Calibration
Raeguard s ec / lel / ir user’s guide zero calibration automatically advances to span calibration when complete. Span calibration 1. Connect the span gas cylinder to the metal filter gas adapter on the raeguard s transmitter using the provided calibration adapter. 23.
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Raeguard s ec / lel / ir user’s guide optional: to access span calibration from the reading display, press[mode]. After “zero” appears on the screen, press [mode] a second time to advance to span calibration. Optional: to access span calibration after zero calibration has already started, press any ...
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Raeguard s ec / lel / ir user’s guide 6. If the sensor’s sensitivity is acceptable, the span data is calculated and saved. 7. The calibration procedure is complete. After a few seconds, the transmitter returns to the reading display. 8. Turn off span calibration gas and remove the cylinder. 2.5 adva...
Page 27: Advanced Menu
Raeguard s ec / lel / ir user’s guide note: anytime a submenu screen is idle for more than 60 seconds, the transmitter returns to the reading display. Advanced menu display explanation calu calibration concentration value cf correction factor, only for raeguard s lel and ir lo low alarm hi high alar...
Page 28
Raeguard s ec / lel / ir user’s guide after entering the advanced menu, step through the parameters by pressing [mode]. To edit a parameter, press [+]. The screen shows the current reading value of the parameter. You can exit advanced menu at any screen by pressing [-]. In addition, advanced menu is...
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Raeguard s ec / lel / ir user’s guide this diagram shows how to edit parameter values and save changes for most of the parameters: 28.
Page 30
Raeguard s ec / lel / ir user’s guide this diagram shows the submenu of parameters for the 4-20ma analog menu: 29.
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Raeguard s ec / lel / ir user’s guide this diagram shows the submenu of parameters for the test menu: * the analog output steps from 4ma to 20ma in 1ma steps and then steps back down to 4ma before returning to the upper menu. Each step is held for 3 seconds. Press any key to interrupt the process. 3...
Page 32: 2.6 Advanced Menu (Ir)
Raeguard s ec / lel / ir user’s guide 2.6 advanced menu (ir) the advanced menu allows the user to change the values for each reading and setup option. To access the advanced menu from the reading display, first press [+], [-],and then [mode] in sequence. Then scroll through the parameters shown belo...
Page 33
Raeguard s ec / lel / ir user’s guide to change a value, press [mode] until the desired parameter appears. Then press [+] to enter the process menu. • to increase a value, press [+]. • to decrease a value, press [-]. Press [mode] when finished changing the value. If a value has changed, the new valu...
Page 34: 3. Theory of Operation
Raeguard s ec / lel / ir user’s guide 3. Theory of operation the raeguard s ec uses electrochemical sensors. The electrons generated at the working electrode travel via the contact pins to be measured at the external circuit and are returned to the counter electrode to complete the circuit, the curr...
Page 35
Raeguard s ec / lel / ir user’s guide the instrument is powered by a dc power supply located in a safe area. The power supply on the pc board contains a switching and linear regulator that converts the main input voltage to 3.3v and 5v dc to power the entire circuit. 34.
Page 36: 4. Maintenance
Raeguard s ec / lel / ir user’s guide 4. Maintenance as a guide, it is recommended to regularly “bump test” a raeguard s unit with a known percentage gas. Lcd main pcb enclosure cover cable socket pcb enclosure body 7r ec, lel, or ndir sensor holder exploded view of raeguard s ec and lel components ...
Page 37: 5. Troubleshooting
Raeguard s ec / lel / ir user’s guide 5. Troubleshooting note: before diagnosing measurement problems, perform zero and span calibration. Symptom reason & solution e001 reason: sensor not installed solution: install the sensor e002 reason: wrong sensor or sensor eeprom error solution: replace sensor...
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Raeguard s ec / lel / ir user’s guide table a: ec sensor configuration the following table contains specifications for sensors in the raeguard s ec series. Sensors range (ppm) resolution (ppm) response time (t 90 ) span (ppm) low (ppm) high (ppm) co 0-1000 1 h 2 s 0-300 0.1 so 2 0-150 0.1 5 2 10 no ...
Page 39: 6. Modbus/rs-485 Information
Raeguard s ec / lel / ir user’s guide 6. Modbus/rs-485 information retrieving gas concentration data from a raeguard s via rs-485 the raeguard s communicates by means of modbus rtu. All monitors provide a 4-byte register value. Note: gas concentration is the only value that can be retrieved. As exam...
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Raeguard s ec / lel / ir user’s guide 39 0x03: read holding registers requesting message: device address func- tion code register address high byte register address low byte quantity of registers high byte quantity of registers low byte crc low byte crc high byte client id 03 00 08 00 02 crc crc ans...
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P/n 033-4117-e00 rev a august 2009.