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9 Product Specifications

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Product Specifications

9-1. List of specifications

＜

Oxygen Deficiency Alarm) SPECIFICATION

＞

Model

GD-F88Di

Detection principle

Galvanic cell method

Gas to be detected

Concentration display

7-segment LCD (4 digits)

Detection range

0～25vol%

Detection method

Suction type (suction unit is required separately)

Suction flow

0.5L/min±10%

Alarm preset point

18vol%(1st<L>)【Standard】
18vol%(2nd<LL>)【Standard】

Indicate accuracy

(under an identical condition)

Within ±0.7vol%

Response time

(under an identical condition)

Within 30sec(T90)(excluding delay in the tube)

Alarm-delay time

(under an identical condition)

By anoxia alarm(Alarm setpoint value:18vol%), Within
5sec(when introducing 10～11vol% gas)

Gas alarm type

Two-step alarm (L-LL)

Gas alarm indication

Alarm message(AL1/AL2)

Gas alarm action

Latching or non latching

Trouble alarm･Self diagnosis

System failure/Sensor failure

Trouble alarm indication

Content display

Trouble alarm action

Non latching

Transmission method

2-wire analog transmission

Transmission specifications

4-20mADC (load resistance: 300Ω or less)

Communication scheme

HART 7

Power supply

24VDC±10%

Power consumption

Approx. 0.6W

Transmission cable

Shielded cable of CVVS, etc. (1.25mm

) - 2-core

Transmission distance

Up to 1km with CVVS 1.25 mm

(up to 600m between the detector

head and Zener Barrier)

Safety maintaining device

Zener Barrier (MTL7728ac//MTL7728-) or
insulating barrier (MTL5541/RN-221N-EJ/KFD2-STC4-Ex1)

Piping port

Rc1/4 (O.D Φ6-1t half-union for Teflon tube<PP>supplied)

Operating temperature

-10 ～ 40℃ (non-rapidly-vary)

Operating humidity

Less than 95%RH (non-condensing)

Structure

Wall mounted type

Explosion-proof structure

Intrinsically safe explosion-proof structure, with safety
maintaining device (barrier) used

Explosion-proof class

Exia

Ⅱ

CT4X

External dimensions

Approx. 220(W)x265(H)x90(D)mm (projection portions excluded)

Содержание GD-F88Di

Страница 1: ...PT2E 1981 2 Wire Gas Detector Head GD F88Di Operating Manual PT2 198...

Страница 2: ...o wire 15 4 7 Recommended cables and terminal plate specifications 15 4 8 System connection example 16 4 9 How to Tube 18 5 How to Operate 20 5 1 Preparation for start up 20 5 2 Basic operating proced...

Страница 3: ...f the indicator alarm unit 1 2 Purpose of use This detector is a fixed type gas detector head which detects oxygen When the detector detects oxygen it outputs a current according to the detected oxyge...

Страница 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...

Страница 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...

Страница 6: ...If a solvent is used for unavoidable reasons attach the recommended filter to the areas such as inlet of the gas detector while using the solvent and for one hour after that 4 For maintenance of the d...

Страница 7: ...gy Institution of Industrial Safety Applied standard Recommended Practices for Explosion Protected Electrical Installations in General Industries Electrical parameter Intrinsically safe circuit allowa...

Страница 8: ...re Intrinsically safe circuit allowable capacitance Co 586 pF Cw or more Wiring Determine the cable type to use and laying distance in consideration of the above parameters to maintain explosion proof...

Страница 9: ...es 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 select an item for each m...

Страница 10: ...ensor Connects the sensor cable 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 u...

Страница 11: ...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...

Страница 12: ...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...

Страница 13: ...CAUTION Check 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 mainte...

Страница 14: ...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...

Страница 15: ...cted safety maintaining device barrier type and length of the cable used It may also vary with the signal current value 4 to 20 mA When wiring the detector check the following to make sure that the vo...

Страница 16: ...ecting to indicator DCS PLC etc non explosion proof system 4 8 2 Example of connecting to Zener Barrier indicator DCS PLC etc GD F88Di detector Host system DCS PLC Non hazardous location GD F88Di dete...

Страница 17: ...and indicator 4 8 4 Example of connecting to insulating barrier indicator DCS PLC etc 5 4 6 3 OX 5002 GD F88Di detector Zener Barrier Hazardous location A type grounding Non hazardous location GD F88D...

Страница 18: ...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...

Страница 19: ...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...

Страница 20: ...ets the specifications The external output may be fluctuated during adjustment Take an appropriate measure to avoid the influence on the gas monitoring system Check that the tubes are connected proper...

Страница 21: ...l Clear approx 25 seconds System check of the unit External output 17 4 mA CAUTION Do not turn off the detector during the initial clear The detector is reading the internal memory during the initial...

Страница 22: ...r adjustment 2 2 Perform the span adjustment 2 3 Environmental 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 Setti...

Страница 23: ...Detection mode LCD display Example Gas to be detected O2 In the detection mode the sampling gas concentration is displayed on the LCD Normal display description Detected gas concentration Name of the...

Страница 24: ...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...

Страница 25: ...on mode 4 0 20 0 mA depends on the gas concentration 2 Initial clear 17 4 mA 3 Maintenance mode 17 4 mA 4 External output test 4 0 20 0 mA varies with the test value 5 Fault state 21 5 mA or more 6 Po...

Страница 26: ...e maintenance mode is left unoperated for 10 hours the detection mode automatically returns 4 4 20 0 mA 17 4 mA The maintenance mode consists of Daily Maintenance and Regular Maintenance and Daily Mai...

Страница 27: ...justment menu displayed When the reading is stabilized press the SET switch The display blinks Indicated value is adjusted to 20 9 on switch 3 Press the SET switch to confirm the setpoint When the pro...

Страница 28: ...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...

Страница 29: ...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...

Страница 30: ...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...

Страница 31: ...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...

Страница 32: ...ommended regular replacement parts Name Maintenance intervals Replacement intervals Quantity pieces per unit Remarks Elbow 6 months 3 8 years 2 O ring flow regulator 6 months 3 8 years 1 O ring sensor...

Страница 33: ...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...

Страница 34: ...of power supply system Provide the rated voltage Take measures such as checking or adding the UPS power supply line filter and insulation transformer Cable abnormalities open circuit not connected sh...

Страница 35: ...interference gases such as solvents completely Please contact RIKEN KEIKI to arrange removal filters Disturbance by noise Turn off and restart the alarm system If such a symptom is observed frequentl...

Страница 36: ...ble alarm Self diagnosis System failure Sensor failure Trouble alarm indication Content display Trouble alarm action Non latching Transmission method 2 wire analog transmission Transmission specificat...

Страница 37: ...ouble alarm indication Content display Trouble alarm action Non latching Transmission method 2 wire analog transmission digital transmission HART communication Transmission specifications 4 20mADC loa...

Страница 38: ...n for the sensor outputs 10 10 Definition of Terms Galvanic cell type This is a principle of the sensor installed in the detector head See 9 2 Detection principle for details vol A unit used to expres...

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