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Riken Keiki GD-F88Ai, Руководство по эксплуатации

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Riken Keiki GD-F88Ai Скачать руководство пользователя страница 25

5. How to Operate 

5-7. How to exit 

- 23 -

 

5-7. How to exit 

To turn off the detector head, turn off the power switch located on the left side of the power terminal plate. 
Then, turn off the power supply (24 VDC) to the detector head.

 

 

 

WARNING 

Decide whether the power can be turned off by checking the operation of the devices connected to 
the external output of the detector head head before turning it off. 

 
 

 

 

Содержание GD-F88Ai

Страница 1: ...PT2E 1941 2 Wire Gas Detector Head GD F88Ai Operating Manual PT2 194...

Страница 2: ...ring 12 4 7 Compatible cables and terminal plate specifications 12 4 8 System connection example 13 5 How to Operate 15 5 1 Preparation for start up 15 5 2 Basic operating procedures 15 5 3 How to sta...

Страница 3: ...pe gas detector head which detects oxygen concentration in the air When the detector head detects oxygen it outputs a current according to the gas concentration The indicator alarm unit indicates the...

Страница 4: ...ad will be in danger Defects in protective functions When seeming defects are found in the protective functions such as protective grounding do not start the detector head Before starting the detector...

Страница 5: ...s by power supply noises static electricity and electromagnetic noises Before using the detector head in an environment with such noises provide for protective measures against them 2 4 Operating Prec...

Страница 6: ...stitution of Industrial Safety Applied standard Recommended Practices for Explosion Protected Electrical Installations in General Industries Electrical parameter Intrinsically safe circuit allowable v...

Страница 7: ...meters to maintain explosion proof performance Perform wiring so that a current or voltage that disturbs intrinsically safe explosion proof performance of the intrinsically safe circuit is not induced...

Страница 8: ...5 UP DOWN switch 6 Nameplate Displays the gas concentration Used at maintenance Switches the mode from the detection mode to maintenance mode Or exits the maintenance mode Used to set the mode during...

Страница 9: ...2 Names and functions for each part 7 Power switch 8 Sensor 9 Terminal plate 10 Grounding terminal 11 Cable inlet Turns ON OFF the power of the unit Detects a gas Connects the power cable A terminal...

Страница 10: ...ions or shocks and it cannot drop Do not install the detector head in a place exposed to direct sunlight or sudden changes in the temperature When selecting installation points avoid a place where it...

Страница 11: ...he noise source if necessary Heat radiation designing When the alarm system is installed in a closed instrumentation panel or the like attach ventilation fans above and below the panel Introducing pro...

Страница 12: ...ot securely installed it might fall causing an unexpected injury or a damage of the unit Do not install the detector head in a place where maintenance of the detector cannot be performed or where hand...

Страница 13: ...a grounding terminal For stable operation of the detector head and safety it must be connected to a grounding terminal Do not connect the grounding wire to a gas pipe The g rounding must be made as D...

Страница 14: ...Plate Rated voltage 250 VAC Rated current 20 A Supply Voltage The supply voltage is normally 24 VDC However the voltage at the terminal plate of the detector head becomes lower than the source voltage...

Страница 15: ...ing to indicator DCS PLC etc non explosion proof system 4 8 2 Example of connecting to Zener Barrier indicator DCS PLC etc 1 2 GD F88Ai detector Upper unit DCS PLC Non hazardous location 1 2 GD F88Ai...

Страница 16: ...and indicator 4 8 4 Example of connecting to insulating barrier indicator DCS PLC etc 1 2 GD F88Ai detector Upper unit DCS PLC Insulating barrier Hazardous location Non hazardous location OX 5002 1 2...

Страница 17: ...e power supply voltage meets the specification and rating The external output may be fluctuated during adjustment Take an appropriate measure to avoid the influence on the gas monitoring system Make s...

Страница 18: ...itch located on the left side of the power terminal plate Initial Clear approx 25 seconds System check of the unit External output 17 4 mA CAUTION Do not turn off the detector head during the initial...

Страница 19: ...Test 2 0 3 LCD Test 2 0 4 Zero adjustment 2 1 Perform zero adjustment Span fresh air adjustment 2 2 Perform span fresh air adjustment 2 3 Environmental setting 2 4 Used for various environmental sett...

Страница 20: ...n mode LCD display In the detection mode the sampling gas concentration is displayed on the LCD Normal display description Detected gas concentration Name of the gas to be detected Unit operation stat...

Страница 21: ...lear 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 0 mA or more 6 Power off 0 0 mA The following figure shows the relation between g...

Страница 22: ...etection mode automatically returns 17 4 20 0 mA 4 0 mA WARNING When the maintenance mode is entered while gas detection is performed the external output signal gas concentration signal becomes 17 4 m...

Страница 23: ...played Draw a zero adjustment gas When the reading is stabilized press the SET switch again The display blinks and fresh air adjustment is performed 3 Press the SET switch to confirm the setpoint WARN...

Страница 24: ...maintenance mode 2 1 3 How to wire Regular Maintenance Mode Switching menu displayed 3 Holding down the SET switch while is displayed enters the regular maintenance mode 4 Press the SET switch while...

Страница 25: ...ower switch located on the left side of the power terminal plate Then turn off the power supply 24 VDC to the detector head WARNING Decide whether the power can be turned off by checking the operation...

Страница 26: ...ate Gas concentration display Check that a gas to be detected is not present around the detector head and that the reading indicates a normal value Alarm test Inspects the alarm circuit by using the a...

Страница 27: ...al diagnosis Checks dust or damage on the surface cover or internal parts of the unit and cleans or repairs such parts as needed Replaces parts which are cracked or damaged Unit operation check Uses t...

Страница 28: ...k see 4 6 Wiring and 4 7 Compatible cables and terminal plate specifications The unpowered time must be minimized when the detector head is relocated CAUTION When using a relocated or stopped stored d...

Страница 29: ...perations Causes and Actions A sudden surge noise can be the cause To recover turn OFF the detector head power and then turn it ON again to restart If such a symptom is observed frequently take approp...

Страница 30: ...Sensor failure Trouble alarm indication Content display Trouble alarm action Non latching Transmission method 2 wire analog transmission digital transmission HART Communication Transmission specificat...

Страница 31: ...y Trouble alarm action Non latching Transmission method 2 wire analog transmission digital transmission HART Communication Transmission specifications 4 20mADC load resistance 300 or less Communicatio...

Страница 32: ...he sensor outputs 10 10 Definition of Terms Galvanic cell type This is a principle of the sensor installed in the detector head See for details vol A unit used to express the percentage of a specific...

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