Riken Keiki GD-K88Di Operating Manual Download Page 1

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PT2E-1975

2-Wire Gas Detector Head

GD-K88Di

Operating Manual

(PT2-197)

Summary of Contents for GD-K88Di

Page 1: ...PT2E 1975 2 Wire Gas Detector Head GD K88Di Operating Manual PT2 197...

Page 2: ...ecommended cables and terminal plate specifications 16 4 8 System connection example 17 4 9 How to Tube 19 5 How to Operate 21 5 1 Preparation for start up 21 5 2 Basic operating procedures 21 5 3 How...

Page 3: ...anual of the indicator alarm unit 1 2 Purpose of use This detector is a fixed type gas detector head which detects combustible and toxic gases When the detector detects gas leakage it outputs a curren...

Page 4: ...y 2 1 Danger cases 4 2 2 Important Notices on Safety 2 1 Danger cases DANGER This detector is the intrinsically safe explosion proof product with Zener Barrier However never attempt to detect a gas ov...

Page 5: ...maintaining device used separately It can be used in a location where a combustible gas or steam is present however it should be done carefully Consult RIKEN KEIKI before operating the detector in suc...

Page 6: ...e membrane is deteriorated by solvents thus causing an electrolyte leak from its inside Do not use solvents near the detector If a solvent is used for unavoidable reasons attach the recommended filter...

Page 7: ...pplied standard Recommended Practices for Explosion Protected Electrical Installations in General Industries JNIOSH TR 46 1 2015 JNIOSH TR 46 6 2015 Electrical parameter Intrinsically safe circuit all...

Page 8: ...e cable type to use and laying distance in consideration of the above parameters to maintain explosion proof performance Perform wiring so that a current or voltage that disturbs intrinsically safe ex...

Page 9: ...2 MODE switch Switches the mode from the detection mode to maintenance mode Or exits the maintenance mode 3 SET switch Used to set the mode during the maintenance mode 4 5 UP DOWN switch Used to selec...

Page 10: ...3 Product Components 3 1 Main unit and standard accessories 10 Standard Accessories Filter Dust filter CF 8350 Attached when the gas to be detected is CO carbon monoxide CF 8364...

Page 11: ...the battery for sensor backup 9 Power switch Turns on off the power of the unit 10 Sensor Detects a gas 11 Terminal plate Connects the power cable 12 Grounding terminal A terminal M4 to ground the uni...

Page 12: ...high voltage devices exist Do not place the detector next to a noise source device Do not run cables in parallel or close to each other Do not install the detector in a place where maintenance of the...

Page 13: ...ures against lightning If cables are installed outside the factory plant or if internal cables are installed in the same duct as the cables coming from outside the factory plant lightning will cause p...

Page 14: ...heck that the main unit is mounted securely on the wall If not the main unit may fall off and cause unexpected injury or damage to the unit Do not install the detector in a place where maintenance of...

Page 15: ...grounding terminal For stable operation of the detector and safety it must be connected to a grounding terminal Never connect the grounding wire to a gas pipe The grounding must be made as D type grou...

Page 16: ...the signal current value 4 to 20 mA When wiring the detector check the following to make sure that the voltage at the terminal plate is appropriate The detector provides stable operation within the po...

Page 17: ...ecting to indicator DCS PLC etc non explosion proof system 4 8 2 Example of connecting to Zener Barrier indicator DCS PLC etc GD K88Di detector Host system DCS PLC Non hazardous location GD K88Di dete...

Page 18: ...4 Example of connecting to insulating barrier indicator DCS PLC etc 5 4 6 3 Short circuit between 3 and 4 EC 5002 EC 592 GD K88Di detector Zener Barrier Hazardous location A type grounding Non hazardo...

Page 19: ...ate required for the detector is 500 cc min or more Consult RIKEN KEIKI for pumps aspirators etc that draw gases externally 3 Tube material Some gases to be detected have highly adsorptive or corrosiv...

Page 20: ...sampling flow rate 1 Check required flow rate Turn the needle gradually to the left Check that the FLOW is over the upper line If not adjust an external pump etc 2 Adjust flow rate Turn the needle so...

Page 21: ...l output may be fluctuated during adjustment Take an appropriate measure to avoid the influence on the gas monitoring system Make sure to use a fuse with the specified ratings to prevent fire Check th...

Page 22: ...l Clear approx 25 seconds System check of the unit External output 4 0 mA Power switch CAUTION Do not turn off the detector during the initial clear The detector is reading the internal memory during...

Page 23: ...ironmental setting 2 4 Used for various environmental settings 2 4 0 2 4 1 INHIBIT Setting 2 4 2 Alarm Setpoint Setting 2 4 3 Alarm Delay Time Setting 2 4 4 Alarm Pattern Setting 2 4 5 Zero Suppressio...

Page 24: ...Detection mode LCD display Example Gas to be detected CO In the detection mode the sampling gas concentration is displayed on the LCD Normal display description Detected gas concentration Name of the...

Page 25: ...el drops to the negative side by 10 or more of the full scale WARNING Accurate gas detection cannot be performed with the negative value display In this case perform zero adjustment Fault Display If a...

Page 26: ...ends on the gas concentration 2 Initial clear 4 0 mA 3 Maintenance mode 4 0 mA or lower 4 External output test 4 0 20 0 mA varies with the test value 5 Fault state 3 5 mA 6 Power off 0 0 mA The follow...

Page 27: ...e If the maintenance mode is left unoperated for 10 hours the detection mode automatically returns 4 0 20 0 mA 4 0 mA The maintenance mode consists of Daily Maintenance and Regular Maintenance and Dai...

Page 28: ...nu displayed Introduce a zero adjustment gas When the reading is stabilized press the SET switch The display blinks and zero adjustment is performed 3 Press the SET switch to confirm the setpoint When...

Page 29: ...n the SET switch while is displayed enters the regular maintenance mode 4 Press the SET switch while 2 0 is displayed to display 2 0 1 Alarm Test Then make a selection with the SET switch 5 Increase t...

Page 30: ...ower switch located on the left side of the power terminal plate Then turn off the power supply 24 VDC to the detector WARNING Before turning off the detector decide whether the power can be turned of...

Page 31: ...orm maintenance once or more for every six months to maintain the performance as a safety unit Maintenance item Maintenance content Daily mainte nance Monthly mainte nance Regular mainte nance Status...

Page 32: ...ro adjustment if the display is incorrect External alarm test Inspect the alarm circuit by using the alarm test function Check the alarm lamps Check the activation Check the external alarm Check the a...

Page 33: ...ration in the maintenance mode 2 In the atmospheric air press the SET switch and confirm that the order in which it is displayed is CAL NOTE If the zero adjustment failed since the zero point was sign...

Page 34: ...ce the reading was significantly fluctuated from the introduced gas concentration it returns to 2 2 after FAIL rather than PASS is displayed In this case the span adjustment has not been completed Che...

Page 35: ...body using the reverse procedure to the above NOTE The gas calibration using the standard gas is required after the sensor is replaced Please make a request to RIKEN KEIKI If adjustment to the standa...

Page 36: ...6 months 3 8 years 430 mm 4253 9330 10 Battery Assy 1 Replaced together with the gas sensor The operation must be checked after replacement by a qualified service engineer For the stable operation of...

Page 37: ...use it again When the detector is relocated select a new place in accordance with 4 2 Precautions for installation sites and 4 4 How to install For information on wiring work see 4 6 How to wire and 4...

Page 38: ...e filter and insulation transformer Cable abnormalities open circuit not connected short circuit Check the wiring of detector and related devices around it Abnormal operations Disturbances by sudden s...

Page 39: ...ther abnormalities at the detection point Presence of interference gas It is difficult to eliminate interference gases such as solvents completely Please contact RIKEN KEIKI to arrange removal filters...

Page 40: ...e Trouble alarm indication content display Trouble alarm action Non latching Transmission method 2 wire analog transmission digital transmission HART Communication Transmission specifications 4 20mADC...

Page 41: ...ent generated at that time 10 10 Definition of Terms Electrochemical type This is a principle of the sensor installed in the detector head See 9 2 Detection principle for details Initial clear Output...

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