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Summary of Contents for Det-Tronics R8471E
- Page 1 Instructions 95-8410 Carbon Monoxide Controller R8471E 8/07 95-8410...
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Page 2: Table Of Contents
Table of Contents Section I - General Information DESCRIPTION ....................1 FEATURES ......................1 SPECIFICATIONS ...................2 Controller ....................2 Sensor .......................2 SYSTEM OPERATION ..................3 Sensor .......................3 Controller ....................3 Section II - System Installation INSTALLATION ....................9 Sensor Location ..................9 General Wiring Requirements ..............9 Sensor Wiring ..................10 Controller Wiring ..................11 Controller Programming ................14 INSTALLATION CHECKLIST ................15... -
Page 3: Section I - General Information
Figure 1 shows the effects of various concentrations of CO on the human body. DESCRIPTION The R8471E is a single channel, rack mounted controller that provides continuous monitoring of a Det-Tronics electrochemical CO sensor or any other CO sensor/transmitter assembly capable of generating a 4 to 20 ma dc signal. -
Page 4: Specifications
2.0 pounds (0.9 kilogram). SYSTEM APPROVAL— (17.8) The R8471E Controller, base and premium model in 3U and 4U height, has been tested and approved by FMA. It can be used with any FMA approved sens- ing device capable of generating a 4 to 20 ma input. -
Page 5: System Operation
SYSTEM OPERATION (12.7) SENSOR (2.8) The C7066E CO Sensor consists of an explosion- proof aluminum housing with a field replaceable electrochemical sensor cell. The transmitter circuitry for generating a 4 to 20 ma output signal is contained 3/4 INCH (20 MM) within the sensor housing, eliminating the need for a (5.6) STANDARD PIPE THREAD... - Page 6 9. SET Pushbutton - Used for various system pro- gramming and calibration functions. Operating Ranges B1384 The R8471E is available in three operating ranges: • 0 to 100 ppm Figure 5—Controller Front Panel • 0 to 500 ppm •...
- Page 7 The low and auxiliary alarm relays are programmable for either latching or non-latching operation. The high The R8471E Controller is available in a Base version and alarm relay is always latching and the Fault relay is a Premium version. The differences between the two non-latching.
- Page 8 — The normally energized Fault output is de-ener- NORMAL gized. — The dc current output drops to less than 1.0 ma. In Normal operating mode with no alarm condition: NOTE — Digital display is on and indicates the sensor input The fault code will be shown for about 2 seconds in ppm.
- Page 9 MUST BE PRESSED BEFORE THE ZERO CALCULATIONS ARE COMPLETED. CURRENT CALIBRATE C1385 Figure 6—R8471E Controller Flow Chart — Bar graph display reads the same as the digital In the Normal operating mode and a high alarm con- display. dition occurring: —...
- Page 10 The Setpoint Adjust mode is entered by depressing the SET button for approximately one second. In this The R8471E uses a fully automatic calibration procedure that requires no adjustments by the operator. The mode the alarm setpoints and calibration gas level...
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Page 11: Section Ii - System Installation
installation of electrical equipment in a hazardous Section II area. If in doubt, consult a qualified official System Installation before wiring the system. The use of shielded cable is highly recommended INSTALLATION for wiring the CO detection system to protect against interference caused by extraneous electrical “noise.”... -
Page 12: Sensor Wiring
Det-Tronics. 4. Remove the cap from the sensor base. See 8. Connect the sensor wires to the sensor terminal Figure 7. -
Page 13: Controller Wiring
The controller is designed for installation in a non-haz- BLK (–) TO SIGNAL ardous area. GROUND Figure 11 shows the terminal configuration for the SENSOR R8471E CO Controller. – GROUND Terminals 1 and 2 – 4 to 20 ma dc output. GROUND JUNCTION BOX ACCORDING TO LOCAL CODES... - Page 14 CONTROLLER POSITIONS FOR: DIM. (A) DIM. (B) DIM. (C) DIM. (D) DIM. (E) FIRE INCH INCH INCH INCH INCH 19.00 482.6 18.30 464.8 17.36 440.9 4.00 101.6 6.97 177.1 15.06 382.6 14.36 364.7 13.42 340.9 11.13 282.6 10.43 264.9 9.49 241.1 9.16 232.7...
- Page 15 OC = OPEN COLLECTOR OUTPUT A1529 (BASE MODEL ONLY) OC = OPEN COLLECTOR OUTPUT A1530 (BASE MODEL ONLY) Figure 12—A Typical System – R8471E with Relay Outputs, Non-Isolated Current Output and C7066E Sensor Figure 13—A Typical System - R8471E with Isolated Current Output 95-8410...
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Page 16: Controller Programming
+32 VDC MAXIMUM IMPORTANT All jumper plugs must be installed. controller outputs will not function properly if a 1N4004 jumper plug is missing. TYPICAL OPEN COLLECTOR OUTPUT Normally Open/Closed Relays 100K The four relays are individually programmed for either normally open or normally closed contacts. This is accomplished by placing a jumper plug on the appropriate pair of pins. -
Page 17: Installation Checklist
Latching/Non-Latching Relays 5. Sensor to controller wiring is correct. 6. Power wiring to the controller is installed and The Low and Auxiliary alarm relays are programmable power source is operational. for latching or non-latching operation. The High alarm relay is always latching. Latching relay operation is 7. -
Page 18: Setpoint Adjustment
5. Put the controller in the Setpoint Display mode 5. After displaying the calibration gas concentra- to determine the present alarm setpoints and tion for two seconds, the controller automatically calibration gas concentration. If changes are leaves the Setpoint Display mode and returns to required, perform the Setpoint Adjustment proce- the Normal operating mode. -
Page 19: Calibration
“Calibration Procedure,” the entire procedure 1. Be certain that the controller is properly pro- must be repeated when power is restored. grammed for the ppm concentration being used for calibration. (See the “Setpoint Adjustment” section.) Reprogram the controller if required. CALIBRATION Failure to do so will greatly impair system To ensure optimum protection, the CO detection... -
Page 20: Current Output Calibration
CURRENT OUTPUT CALIBRATION Section IV System Maintenance The 4 to 20 ma output is calibrated at the factory to provide a degree of accuracy that is satisfactory ROUTINE MAINTENANCE for most applications. However, the highest level of accuracy can be obtained by performing the follow- To ensure reliable protection, it is important to check ing procedure. -
Page 21: Sensor Cell Replacement
Compare part numbers to be sure that the correct REPLACEMENT PARTS replacement cell is being used. The R8471E Controller is not designed to be repaired 5. Determine proper orientation for the new cell, then in the field. If a problem should develop, first carefully carefully plug it in. - Page 22 Table 6—Troubleshooting Guide Problem Possible Cause No faceplate indicators 1. Wiring to external power source. illuminated. 2. Input power failure. FAULT LED on, digital 1. Power-up time delay (up to 5 minutes). display blank. 2. If condition continues after 5 minutes, repeat power- up.
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Page 23: Device Repair And Return
W4810 Power Supply mounted in explosion-proof When ordering please specify: enclosure, 24 vdc at 1.0 ampere CONTROLLERS CALIBRATION EQUIPMENT R8471E CO Controller: CO Calibration Kit includes regulator, hose, calibration Base model cup and two cylinders of calibration gas. Premium model... - Page 24 Recommended Test Form Detector Detector Date Date Date Remarks Number Location Installed Checked Calibrated 95-8410...
- Page 25 Fault Record Sheet Detector Date Time System Status Operator Comments Affected 95-8410...
- Page 26 Safety System Det-Tronics, the DET-TRONICS logo, Eagle Quantum Premier, and Eclipse are registered trademarks or trademarks of Detector Electronics Corporation in the United States, other countries, or both. Other company, product, or service names may be trademarks or service marks of others.
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