Riken Keiki GD-K71D User manual

PT2E-1057
OPERATING MANUAL
FOR
INTELLIGENT GAS DETECTOR
GD-K71D

1
INDEX
１．PRODUCT OUTLINE
１－１． Preface ……………………………………………………………………… 3
１－２． Application for use ………………………………………………………… 3
１－３． Identification of each signal word ………………………………………… 3
２．IMPORTANT INSTRUCTION FOR THE SAFETY
２－１． Danｇer items………………………………………………………………… 4
２－２． Warning items………………………………………………………………… 4
２－３． Caution items………………………………………………………………… 5
３．PRODUCT FUNCTION
３－１． External drawing……………………………………………………………… 6
３－２． Product composition
３－２－１ Major components…………………………………………………… 7
３－２－２ Unit detaching ……………………………………………………… 8
３－３． Installation pitch …………………………………………………………… 9
３－４． Name of each part and functions
３－４－１ Front view …………………………………………………………… 10
３－４－２ Inside view …………………………………………………………… 11
３－５． Block diagram
３－５－１ Electric diagram …………………………………………………… 12
３－５－２ Tubing diagram……………………………………………………… 12
４．HOW TO USE
４－１． Before operation……………………………………………………………… 13
４－２． Installation place …………………………………………………………… 13
４－３． Caution in the system engineering ………………………………………… 14
４－４． Grounding …………………………………………………………………… 17
４－５． Caution at wiring construction …………………………………………… 18
４－６． Applicable cable
４－６－１ Power/signal cable ………………………………………………… 18
４－６－２ Relay output signal cable …………………………………………… 18
４－６－３ Specifications of terminal…………………………………………… 18
４－６－４ Terminal plate ……………………………………………………… 19
４－７． Example of cable connection
４－７－１ Connection with indicator/alarm unit(EC-573A, EC-583)………… 19
４－７－２ Connection with indicator unit, DCS,PLC ………………………… 19
４－８． Cautions at piping construction …………………………………………… 20
５．OPERATION METHOD
５－１． Preparation before start up ……………………………………………… 21
５－２． Basic performance flow……………………………………………………… 21
５－３． Start up method
５－３－１． Power on …………………………………………………………… 22
５－３－２． Flowmonitor(Sensor flow) adjustment …………………………… 22
５－４． Explanation of performance (Detection mode)
５－４－１． Display action …………………………………………………… 23
５－４－２． External output action …………………………………………… 25

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５－５． Maintenance and adjustment
５－５－１． Maintenance mode………………………………………………… 26
５－５－２． Zero adjustment…………………………………………………… 27
５－５－３． Confirmation of alarm level ……………………………………… 28
５－５－４． Alarm test ………………………………………………………… 29
５－６． How to finish operation……………………………………………………… 30
６．KINDS OF ALARM AND ITS FUNCTION
６－１． Kinds of alarms …………………………………………………………… 31
６－２． Gas alarm
６－２－１． Gas alarm action ………………………………………………… 31
６－２－２． Counteraction at gas alarm ……………………………………… 32
６－２－３． Gas alarm possibility except the case of gas detection………… 32
７．MAINTENANCE CHECK
７－１． Frequency of maintenance and check items
７－１－１． Daily check………………………………………………………… 33
７－１－２． Regular maintenance check ……………………………………… 33
７－１－３． Maintenance contract for regular check ………………………… 33
７－２． Calibration method (Calibration with gas etc.)……………………………… 34
７－３． Replacement of sensor and parts …………………………………………… 34
７－４． Treatment when operation is stopped or its installation place is moved
７－４－１． Stopping the normal operation…………………………………… 34
７－４－２． Installation when move its place ………………………………… 34
７－５． Storage or treatment when not in use for a long time …………………… 34
７－６． List of recommendable spare parts for regular maintenance……………… 35
８．TREATMENT AT ABNORMAL CASE
８－１． Trouble alarm………………………………………………………………… 36
８－２． Counteraction at trouble alarm……………………………………………… 36
８－３． Before it is thought to be a trouble………………………………………… 36
８－４． Trouble shooting……………………………………………………………… 37
９．DEFINITION OF TERMS ………………………………………………… 39
１０．DETECTION PRINCIPLE ……………………………………………… 41
１１．LIST OF PRODUCT SPECIFICATIONS
１１－１． Specifications …………………………………………………………… 42
１１－２． Product composition …………………………………………………… 43

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１．PRODUCT OUTLINE
１－１．Preface
First of all, we wish to express our heartfelt thanks for your purchase of our intelligent gas
detector GD-K71D.
This manual is just a guide book to operate our gas detector GD-K71D.
Your kind reading of this manual is requested not only for first user but for already
experienced staff.
１－２．Application for use
This is a fixed type toxic gas detector to be used in semiconductor manufacturing factories,
etc. Toxic gas leaked into ambient air is sampled with internal pump and is detected with
electrochemical sensor. Detection results (Gas concentrations) are displayed with 4-digit LED
indicator.
The GD-K71D transmits gas concentration signals with 4～20mADC to upper system.
This detector provides 2 relay outputs for outer gas alarm.
１－３． Identification of each signal word
Indicates an imminently hazardous situation which, if not avoided, will
result in death or serious injury or serious damage to the product.
This signal word is to be limited to the most extreme situation.
Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury on the human body or object.
Indicates a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury or some damage on the human body
or objects. It may also be used to alert against unsafe practices.
This means “ADVICE” at operation.
DANGER
WARNING
CAUTION
* NOTE

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２．IMPORTANT INSTRUCTION FOR THE SAFETY
２－１．Danger items
２－２．Warning items
○ Power source
Before turning the power on, check that the supplied voltage is within the specified voltage.
Then, turn the power on
.
○ Necessity of grounding
Do not cut the wire for protective ground both inside and outside of instrument. Or, do not
disconnect the connection of the ground terminals.
○ Defect of protective function
Before starting the operation, check if any defect is not found on the protective grounding.
If there is any defect on the protective functions such as protective grounding or fuse, do
not start the operation.
○ Fuse
To protect the instrument from fire, use the specifically rated fuse. When replacing the
fuse, turn off the power inside of the panel, and the power source as well. Do not use
fuse that is not specified, or do not make a short-circuit inside of the fuse holder.
○ Operation in gas
Do not operate the instrument in an atmosphere of combustible gases, explosive gases
or steam. It is very dangerous to operate the instrument under such circumstances.
○ External connections
After making the protective grounding, start connecting the instrument to detecting object
and other external control circuit.
○ Treatment of lithium battery
Do not recharge, disassemble, heating above 100℃ or burn the battery since it would ignite,
explode or start to burn.
○ Treatment of sensor
Do not disassemble the sensor, since there is an electrolyte inside.
If your finger touches the electrolyte, wash your finger with water immediately.
WARNING
This is not an explosion proof detector.
Never to detect high concentration gas beyond their lower explosive limit.
DANGER

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２－３．Caution items
○ Do not use a walky-talky around the instrument.
The indication might be affected by the electromagnetic wave generated by the
walky-talky if it is used near the instrument. When the walky-talky is used, be away
enough from the instrument not to affect.
○ Take at least 5 seconds interval when re-turning the power on.
Normal operation cannot be performed if the power is re-turned on within 5 seconds.
○ Confirm the float of the flowmonitor is within two red bars.
If the float gets below the lower red bar, the correct gas detection cannot be
performed. Adjust the flow rate.
○ Equip a dust filter to the outside of the detector if it is used in a dusty place.
The dust filter depends on a measuring gas. Consult our sales agents.
○ Take care not to drop the cover when taking it out.
Dropping the cover might cause a serious injure. Take care.
○ Do not control other equipment by using outputs of this detector.
This is not a control equipment. It is prohibited to control other equipment by using
outputs of this detector.
CAUTION
○ Treatment at gas alarming
It is very dangerous if the instrument detects the gas exceeded the alarm points.
Take any treatment based on your judgment at that time.
WARNING

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３－３．Installation pitch
Keep the space of this oblique part as the installation space.
（１）Install the wall mounting bracket on the wall.
（２）Put the detector unit on the wall mounting bracket.
Confirm that the detector unit is surely fixed to the wall mounting bracket after
finishing the job.
If it is not surely fixed, the detector unit might drop and cause injury or damage itself.
CAUTION
！
Fig. 1: Dimension of mounting pitch
Wall