Riken Keiki SD-1DRI User manual

PT2E-2981
Smart transmitter/Gas Detector Head
SD-1DRI
（TYPE MED EX）
Operating Manual
(PT2E-196)

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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.
Perform zero adjustment regularly (every 1 month).
2. Do not use the gas detector in a place where the temperature changes drastically (about 10-15℃or
more).
3. 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.
4. This is a safety unit, not a control unit.
If use in safety unit, the analog signal output of the detector 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.
5. Please contact us because a pretreatment device is required for gas sampling from locations with high
humidity, dust, or acid mist.
6. For maintenance of the gas detector, it is necessary to perform a regular inspection including
replacement adjustment of the regular replacement parts described in the operating manual.

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<Contents>
Operating Precautions.............................................................................................................. 2
Outline of the Product............................................................................................................... 4
1-1. Preface.............................................................................................................................. 4
1-2. Purpose of use .................................................................................................................. 4
1-3. Definition of DANGER, WARNING, CAUTION, and NOTE............................................... 4
1-4. Method of confirmation for Standards and Explosion proof specification .......................... 5
Important Notices on Safety ..................................................................................................... 6
2-1. Danger cases .................................................................................................................... 6
2-2. Warning cases .................................................................................................................. 7
2-3. Precautions ....................................................................................................................... 8
2-4. Safety Information ............................................................................................................. 9
Product Components................................................................................................................ 10
3-1. Gas detector and standard accessories............................................................................ 10
3-2. Names and functions for each part ................................................................................... 11
3-3. Block diagram ................................................................................................................... 12
How to Use............................................................................................................................... 13
4-1. Before using the detector .................................................................................................. 13
4-2. Precautions for installation points...................................................................................... 13
4-3. Precautions for system designing ..................................................................................... 14
4-4. How to install..................................................................................................................... 16
4-5. Installation procedure........................................................................................................ 17
4-6. How to wire ....................................................................................................................... 18
4-7. How to tube ....................................................................................................................... 22
How to Operate ........................................................................................................................ 23
5-1. Preparation for start-up ..................................................................................................... 23
5-2. Basic operating procedures............................................................................................... 23
5-3. How to start the detector ................................................................................................... 24
5-4. Modes ............................................................................................................................... 25
5-5. Maintenance Mode(User).................................................................................................. 26
5-6. How to exit ........................................................................................................................ 28
Operations and Functions ........................................................................................................ 29
6-1. Gas alarm activation ......................................................................................................... 29
6-2. Fault alarm activation ........................................................................................................ 30
6-3. Warning activation............................................................................................................. 30
6-4. External output operation .................................................................................................. 31
6-5. Other functions.................................................................................................................. 32
Maintenance............................................................................................................................. 33
7-1. Maintenance intervals and items....................................................................................... 33
7-2. Maintenance Mode(Regular maintenance) ....................................................................... 35
7-3. Gas calibration method ..................................................................................................... 42
7-4. Parts replacement ............................................................................................................. 46
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
Troubleshooting........................................................................................................................ 49
Product Specifications.............................................................................................................. 51
10-1. List of specifications ........................................................................................................ 51
10-2. Detection principle........................................................................................................... 54
Definition of Terms.................................................................................................................... 55

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(TYPE MED EX). 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.
1-2. Purpose of use
The detector is fixed type gas detector head that detects leak of combustible gas and has analog signal
output(4-20mA).
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 outputs gas concentration in 4 – 20 mA.
An external pump etc. outside the detector introduces gas to perform gas detection.
The detector has HART communication function. The HART communication function can be used only
during maintenance.
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.
1-3. Definition of DANGER, WARNING, CAUTION, and
NOTE
DANGER
This message indicates that improper handling may cause serious
damage on life, health or assets.
WARNING
This message indicates that improper handling may cause serious
damage on health or assets.
CAUTION
This message indicates that improper handling may cause minor
damage on health or assets.
NOTE This message indicates advice on handling.

4 How to Use 4-3. Precautions for system designing
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Protection against
lightning
Take appropriate measures in accordance with the importance of the facilities
and the environment.
Provide protection by a lightning arrester (cable safety retainer).
(Although inductive lightning surge can be transmitted through the cable, it is
prevented by installing a lightning arrester before the field devices and central
processing equipment. For information on how to use a lightning arrester,
please contact the manufacturer.)
Grounding In addition to lightning, there are more sources of surge noise. To protect units
from these noise sources, the units must be grounded.
* The lightning arrester has a circuit to remove a surge voltage which damages field devices, so that
signals may be attenuated. Before installing a lightning arrester, verify that it works properly.