Riken Keiki SD-1DRI-AS User manual

PT2E-2117
Smart transmitter/Gas Detector Head
SD-1DRI-AS
Operating Manual
(PT2E-196)
(PT2-196)

Operating Precautions
This detector is a gas detector that detects combustible gases, toxic gases in the air and triggers a gas
alarm.
The gas detector is a safety unit, not an analyzer or densitometer which performs quantitative/qualitative
analysis/measurement for gases.
Please fully understand the following points before using it, so that it can be used properly.
1. This detector may be interfered by gases and vapors other than the gas to be detected.
Please note that the alarm may be triggered by interference. In addition, it may be fluctuated by
environmental (temperature, humidity, etc.) changes in the installation site.
2. The alarm must be set within a range where the performance of the detector can be ensured.
In facilities compliant with the High Pressure Gas Safety Act, an alarm setting below our standard
alarm setpoint may trigger a false alarm.
3. This is a safety unit, not a control unit.
The alarm contact output of the detector must be used for an external alarm lamp/buzzer, while the
alarm signal output must be used for an indicator or external recorder.
If these outputs are used to control other units, we shall not be responsible for any malfunctions.
4. For maintenance of the detector, it must go through a regular maintenance, including replacement and
adjustment of the regular replacement parts as specified in the operating manual. In addition, because
this is a safety unit, it is recommended that a regular maintenance and a gas calibration are performed
every six months in accordance with the regulations.

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Contents
1 Outline of the Product ........................................................................................................ 2
1-1. Preface.............................................................................................................................. 2
1-2. Purpose of use .................................................................................................................. 2
1-3. Definition of DANGER, WARNING, CAUTION, and NOTE............................................... 3
1-4. Method of confirmation for Standards and Explosion proof specification .......................... 3
2 Important Notices on Safety................................................................................................ 4
2-1. Danger cases .................................................................................................................... 4
2-2. Warning cases .................................................................................................................. 5
2-3. Precautions ....................................................................................................................... 6
2-4. Safety Information ............................................................................................................. 7
3 Product Components .......................................................................................................... 9
3-1. Gas detector and standard accessories............................................................................ 9
3-2. Names and functions for each part ................................................................................... 10
3-3. Block diagram ................................................................................................................... 12
4 How to Use ......................................................................................................................... 14
4-1. Before using the detector .................................................................................................. 14
4-2. Precautions for installation points...................................................................................... 14
4-3. Precautions for system designing ..................................................................................... 15
4-4. How to install..................................................................................................................... 17
4-5. How to wire ....................................................................................................................... 18
4-6. How to tube ....................................................................................................................... 23
5 How to Operate................................................................................................................... 24
5-1. Preparation for start-up ..................................................................................................... 24
5-2. Basic operating procedures............................................................................................... 24
5-3. How to start the detector ................................................................................................... 25
5-4. Modes ............................................................................................................................... 26
5-5. User mode......................................................................................................................... 27
5-6. Flow Rate Adjustment ....................................................................................................... 30
5-7. How to exit ........................................................................................................................ 30
6 Operations and Functions................................................................................................... 31
6-1. Gas alarm activation ......................................................................................................... 31
6-2. Fault alarm activation ........................................................................................................ 32
6-3. External output operation .................................................................................................. 33
6-4. Other functions.................................................................................................................. 34
7 Maintenance ....................................................................................................................... 35
7-1. Maintenance intervals and items....................................................................................... 35
7-2. Maintenance Mode............................................................................................................ 37
7-3. Calibration method ............................................................................................................ 44
7-4. Parts replacement ............................................................................................................. 47
8 Storage, Relocation and Disposal....................................................................................... 48
8-1. Procedures to store the detector or leave it for a long time............................................... 48
8-2. Procedures to relocate the detector or use it again........................................................... 48
8-3. Disposal of products.......................................................................................................... 48
9 Troubleshooting .................................................................................................................. 49
10 Product Specifications ...................................................................................................... 51
10-1. List of specifications ........................................................................................................ 51
10-2. Detection principle........................................................................................................... 56
11 Definition of Terms ............................................................................................................ 57

1 Outline of the Product 1-1. Preface
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1
Outline of the Product
1-1. Preface
Thank you for choosing our smart transmitter/gas detector head SD-1DRI-AS. Please check that the model
number of the product you purchased is included in the specifications on this manual.
This manual explains how to use the detector and its specifications. It contains information required for
using the detector properly. Not only the first-time users but also the users who have already used the
product must read and understand the operating manual to enhance the knowledge and experience before
using the detector.
The display digit vary according to a detection range. This manual provides explanation using a detection
range from 0 to 100.0 %LEL as examples (such as examples of LED display).
1-2. Purpose of use
The detector is a fixed type gas detector head that detects leak of combustible gases, toxic gases and that
performs the alarm activation when the gas concentration is over the setting value.
This detector is a safety unit, not an analyzer or densitometer which performs quantitative/qualitative
analysis/measurement for gases. Please fully understand the features of the detector before using it, so that
it can be used properly.
The detector detects abnormalities in the air caused by presence of gases or other reasons (leak) with the
built-in gas sensor. The concentrations of detected gases are displayed on the seven-segment LED.
The detector draws a gas by an aspirator using compressed air to perform gas detection.
The detector has a built-in alarm contact and can be used either as a gas alarm, fault alarm, or common
(gas, fault) alarm.
The detector outputs gas concentration in 4 – 20 mA.

3 Product Components 3-2. Names and functions for each part
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No. Name Function
(1) Gas detector
head Detects a gas (applicable detector head: SD-1DRI).
(2) External cable
inlet
A port to draw a power and signal cables for the gas
detector head.
(3) Needle valve Adjusts the amount of compressed air after reducing
pressure.
(4) Compact
regulator
Reduces the pressure of supplied compressed air and
displays a pressure value after the reduction.
(5) Adjusting knob A knob turned to reduce the pressure of supplied
compressed air.
(6) Gas inlet An inlet for gases.
(7) Gas/air outlet An outlet for gases and compressed air.
(8) Compressed air
inlet An inlet for compressed air.
(1) MENU/ESC key Used to enter the maintenance mode.
It is also used to cancel in a specific mode.
(2) SET key It is used for value confirmation and so on in a specific mode.
(3) ▲key Used to switch menus or change a value (UP).
(4) ▼key Used to switch menus or change a value (DOWN).
(5) Power lamp
Power lamp:
Detection mode: It lights up in green.
Maintenance mode: It blinks in green.
(6) Alarm lamp Alarm lamp. It lights up in red when the alarm setpoint value is
reached.
(7) Fault lamp Fault lamp. It lights up in yellow when an abnormality is detected in
the detector.
(8) Concentration value display Displays the gas concentration and so on.
(8) Concentration
value display
(5) Power lamp (6) Alarm lamp (7) Fault lamp
(1) MENU/ESC key
(2) SET key (4) ▼key
(3) ▲key