DLJ-305 flame ionization detector

I. Overview: DLJ-305 flame ionization detector is mainly used for industrial gas burner flame detection is based on the principle of combustion of fuel developed ion, selected imports of military integrated device assembly, using military flame signal transmission speed optoelectronic devices , high sensitivity, interference is strong, the flame can be continuously monitored, and to exclude the carbon impact of wiring capacitance, only to flame sensitive to high temperature no response. Second, the main technical parameters: Power supply voltage: 200 ~ 240V · AC 50 / 60HZ flame probe: I (ionic) detection response time: <0.2S flameout off valve delay time: 1 to 7 seconds adjustable ignition time: 5 ~ 7 seconds Probe Distance: ≤200 m probe electrode Temperature: ≤1300 ℃ (long-term) Third, monitor the work program: power, monitor output timing of the ignition signal and the solenoid valve opening signal, if successful ignition, the ignition signal turns off After continued output of the fuel valve opening signal; if ignition fails, turn off the ignition signal and the fuel valve open signal, and output passive alarm signal. Fourth, the monitor terminal is defined as follows: 1, then ion probe 2, 3 neutral wire, live wire 4,5 ignition signal output, 220V · AC output capacity 5A 6,7 valve opening signal, 220V · AC, capacity 5A 8 9 output passive normally open, passive fire closed 9,10 output normally closed, and fire off five dimensions: Housing: ABS plastic (waterproof) Color: Grey Volume: 158 × 90 × 41mm dimensions : 182 × 52mm rectangular mounting (length and width of the reserved 200 × 100) mounting holes: φ7.0mm ion probe mounting thread: M14 × 1.25 (or according to customer requirements) ion probe diameter: φ12 extending into the flame zone Φ4 ion probe electrode Material: pyromax superalloy ion probe length: according to customer requirements to install detection electrodes must be exposed to flame detection hole Φ12.5mm, long-term working electrode temperature 1300 ℃, without cooling. 6, installation: the monitor detects the flame using contact detection mode, when you install the detector electrode must be made in the monitoring of the center electrode can be exposed to flame, the center electrode measuring electrode must be insulated, do not touch the metal burner materials or refractory material. The center electrode material detection electrode is made of special high temperature oxidation resistant material, the installation of the detection electrode, no ventilation and cooling, the detection electrode may be long-term use at high temperatures of 1300 ℃, the maximum temperature of not more than 1400 ℃, ask the user to select a suitable location installation. The monitor uses a single electrode testing, such as user isolation AC power, connect the power output of a single isolated wire grounding, while access terminals monitor 2. Seven debugging: In order to improve the insulation performance to reduce the wiring stray capacitance, preferably a 500V breakdown voltage wire wiring, control outdoor test line preferably aerial wiring, try not to use trench wiring. Test line should not be mixed with other power line or signal line. Users without power on, measure the output of the resistance value detected on the ground, the resistance 値 must be greater than 20MΩ, measured with three tables, can not be measured by the shake table to avoid damage to the controller. In the case of non-flame, open the module cover, the power, the hour hand slowly along the top left of the blue squares adjustment module sensitivity adjustment potentiometer until relay, the green light, then counterclockwise slowly potentiometer, so that the green indicator lights out, the relay just released as a standard, then adjust counterclockwise 2 laps, then monitor debugged. The module central circular flame off valve potentiometer adjustment time, adjust the range of 1 to 7 seconds, clockwise off valve regulating prolonged, whereas valve time is shorter, depending on the flame steady state set off valves times, different conditions apply It needs. Monitoring sensitivity has been debugged at the factory, under normal circumstances do not need to re-commissioning. Eight, Troubleshooting: 1. burner flame is normal, and the detection of the center electrode can come into contact with the flame, and monitor judges without fire. A. turn off the power, the measurement detector to ground insulation resistance, if the resistance is less than 20 MΩ, is a high temperature ceramic insulating tube sensing electrode coke or serious damage caused to detect wire insulation, such as ceramic serious coke, coke cleanup can, such as poor insulation test line, replace the test line. B. If the test line-to-ground resistance is greater than 20 MΩ, may be due to increased lead absorption of moisture so the distributed capacitance, measure the test line-to-ground capacitance, in the case of not greater than 0.1μF capacitance, re-adjust the sensitivity adjustment module in the upper left potentiometer. If capacitance greater than 0.1μF, best to consider shortening the distance module and probe. 2. The burner fire, and the monitor displays a fire. Because the module is in the upper left potentiometer sensitivity adjustment overshoot due to re-commissioning.