Riken Keiki PT2E-1771 User manual

PT2E-1771
Smart Transmitter/Gas Detector Head
SD-1OX
Operating Manual
(PT2E-177)
(PT2-177)

Operating Precautions
This detector is an oxygen deficiency detector that detects oxygen in the air and triggers an oxygen
deficiency alarm.
The oxygen deficiency detector is a safety unit, not an analyzer or densitometer which performs
quantitative/qualitative analysis/measurement for oxygen.
Please fully understand the following points before using it, so that it can be used properly.
1. The readings of the detector fluctuate slightly in response to changes in the air pressure.
In particular, be careful of alarm activation when a low air pressure is brought in by typhoon. 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.
The standard alarm setpoint value is 18 vol%.
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
analog signal output must be used for an indicator or external recorder.
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 span adjustment are performed
every six months.

- 1 -
<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......................................2
2. Important Notices on Safety....................................................................................3
2-1. Danger cases ..........................................................................................................3
2-2. Warning cases.........................................................................................................4
2-3. Precautions .............................................................................................................5
2-4. Safety information ...................................................................................................5
3. Product Components...............................................................................................8
3-1. Main unit and standard accessories........................................................................8
3-2. Names and functions for each part..........................................................................9
3-3. Block diagram..........................................................................................................10
4. How to Use..............................................................................................................11
4-1. Before using the gas detector..................................................................................11
4-2. Precautions for installation sites..............................................................................11
4-3. Precautions for system designing............................................................................12
4-4. How to install...........................................................................................................14
4-5. How to wire..............................................................................................................15
5. How to Operate .......................................................................................................21
5-1. Preparation for start-up............................................................................................21
5-2. Basic operating procedures.....................................................................................21
5-3. How to start the gas detector...................................................................................22
5-4. Modes......................................................................................................................23
5-5. User mode...............................................................................................................24
5-6. How to exit...............................................................................................................26
6. Operations and Functions .......................................................................................27
6-1. Gas alarm activation................................................................................................27
6-2. Fault alarm activation ..............................................................................................28
6-3. External output operation ........................................................................................29
6-4. Other functions........................................................................................................30
7. Maintenance............................................................................................................31
7-1. Maintenance intervals and items.............................................................................31
7-2. Regular maintenance mode ....................................................................................33
7-3. Calibration method ..................................................................................................40
7-4. Replacement parts ..................................................................................................43
8. Storage, Relocation and Disposal ...........................................................................44
8-1. Procedures to store the gas detector or leave it for a long time ..............................44
8-2. Procedures to relocate the detector or use it again.................................................44
8-3. Disposal of products................................................................................................44
9. Troubleshooting.......................................................................................................45
10. Product Specifications.............................................................................................47
10-1. List of specifications ................................................................................................47
10-2. List of accessories...................................................................................................50
10-3. Detection principle...................................................................................................51
11. Definition of Terms...................................................................................................52

1 Outline of the Product 1-1. Preface
- 2 -
1
Outline of the Product
1-1. Preface
Thank you for choosing our smart transmitter/gas detector head SD-1OX. 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 gas 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
This detector is a fixed type gas detector head that detects oxygen and performs the alarm activation
when the gas concentration is over the setting value.
The 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 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.
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.

2 Important Notices on Safety 2-1. Danger cases
- 3 -
2
Important Notices on
Safety
2-1. Danger cases
DANGER
About explosion-proof
The window plate material is a polycarbonate resin. Do not use organic solvents and alkali
types (liquid or vapor). It may cause the color and shape of the window plate to be changed.
Do not open the lid when applying current.
Do not attempt to repair the detector.
For the lid, use hexagon socket head bolts specified by RIKEN KEIKI.
Do not apply a strong force or shock to the window plate. The explosion-proof performances
may be deteriorated due to damages. The explosion protection condition for the detector is
"low (2J)" possibility of mechanical damage.
Ambient temperature:
ATEX/IECEx Specifications: -20 to +60°C
TIIS Specifications: -20 to +53°C
(The ambient temperature on explosion-proof certification is described above and it indicates
the temperature range which can maintain the explosion-proof performance and not the
product performance, see “10-1. List of specifications”for details.)
Do not replace parts at your sole discretion but contact RIKEN KEIKI if the transparent window
has a crack or the explosion-proof joint surface is abnormal, or the clamping screw or bolt is
changed, lost etc.
Do not repair the explosion-proof joint surface.
Be careful not to hit sharp tools against the window plate.

2 Important Notices on Safety 2-2. Warning cases
- 4 -
2-2. Warning cases
WARNING
Power supply
Before turning on the detector, always check that the voltage is properly applied. Do not use an
unstable power supply because it may cause malfunctions.
Need of grounding circuit
Do not cut the grounding circuit or disconnect the wire from the grounding terminal.
Defects in protective functions
Before starting the detector, check the protective functions for defects. When seeming defects are
found in the protective functions, such as protective grounding, do not start the detector.
External connection
Before connecting the detector to the external control circuit, securely connect it to a protective
grounding circuit.
Span adjustment in atmosphere
When the span adjustment is performed in the atmosphere, check the atmosphere for freshness
before beginning the adjustment. If interference gases exist, the adjustment cannot be performed
properly, thus leading to dangers when the oxygen concentration fluctuates.
Response to gas alarm
Issuance of a gas alarm indicates that there are extreme dangers. Take proper actions based on
your judgment.
Handling of sensor
Do not disassemble the sensor used by the detector because it contains electrolyte. Electrolyte may
cause severe skin burns if it contacts skin, while it may cause blindness if its contacts eyes. If
electrolyte is adhered on your clothes, that part on your clothes is discolored or its material is
decomposed. If contact occurs, rinse the area immediately with a large quantity of water.

2 Important Notices on Safety 2-3. Precautions
- 5 -
2-3. Precautions
CAUTION
Do not use a transceiver near the detector.
Radio wave from a transceiver or other radio wave transmitting device near the detector or its
cables may disturb readings. If a transceiver or other radio wave transmitting device is used, it must
be used in a place where it disturbs nothing.
To restart the detector, wait for five seconds or more before doing it.
Restarting the detector in less than five seconds may cause errors.
Do not use the external output of the detector to control other units.
This is not a control unit. It is not allowed to use the external output of the detector to control other
units.
Do not disassemble/modify the detector, or change the settings if not necessary.
Disassembling/modifying the detector will invalidate the warranty of the performance. Changing the
settings without understanding the specifications may cause alarm malfunctions. Please use the
detector properly in accordance with the operating manual.
Avoid applying organic solvents and others to the window plate for a long time.
The window plate material is a polycarbonate resin. When organic solvents (liquid or
highly-concentrated vapor) and others are applied to the plate for a long time, its color and shape
may be changed.
Never fail to perform a regular maintenance.
Since this is a safety unit, a regular maintenance must be performed to ensure safety. Continuing to
use the detector without performing a maintenance will deteriorate the sensitivity of the sensor, thus
resulting in inaccurate gas detection.

2 Important Notices on Safety 2-4. Safety Information
- 6 -
2-4. Safety Information
Necessary information for explosion proof construction of Model SD-1OX.
The Model SD-1OX is a fixed mount, continuous-monitoring detector head and provides a 4-20mAsignal
which indicates the target gas reading for use by a gas monitoring controller, recording device, or
programmable controller.
There is one point of contact and works by gas warning or trouble or both by setting.
<ATEX/IECEx Specifications>
Technical Data
(Protection Method) Flameproof enclosure “d”
(Certificate Numbers) IECEx DEK 13.0024X
DEKRA 13ATEX0035 X
(Group) II
(Category) 2G
(Type of Protection and Marking code) Ex d IIC T6
(Equipment Protection Level) Gb
(Ambient Temperature)* -20C to +60C
(Electrical Data) Supply voltage: DC24 V 45mA
Output signal (4 to 20 mA): DC24V 22mA
Relay (Contact output): DC30V or AC250V 0.5A
(Applicable Standard) IEC 60079-0: 2011，IEC 60079-1: 2007
EN 60079-0: 2012，EN 60079-1: 2007
(Manual Number) PT2E-177
* The ambient temperature on explosion-proof certification is described above and it indicates the
temperature range which can maintain the explosion-proof performance and not the product performance,
see “10-1. List of specifications”for details.
Installation
GND
Sig+
RLY
GND
Sig+
RLY
Indicator etc.
24V
Gas Detector (SD-1OX)
Hazardous Location
(Zone 1)
Nonhazardous Location
Installation Diagram
CVVS Cable
24V

2 Important Notices on Safety 2-4. Safety Information
- 7 -
<TIIS Specifications>
Technical Data
(Protection Method) Flameproof enclosure
(Explosion-proof class) Ex d IIC T6X
(Ambient Temperature)* -20C to +53C
(Electrical Data) Supply voltage: DC24V 45mA
Detecting element output signal: DC0.1V 0.2mA
Analog signal output: DC24V 22mA
Contact output (Contact capacity): AC250V 0.5A (Load resistance)
DC30V 0.5A (Load resistance)
(Applicable Standard) JNIOSH-TR-NO. 43(2008)
*The ambient temperature on explosion-proof certification is described above and it indicates the
temperature range which can maintain the explosion-proof performance and not the product performance,
see “10-1. List of specifications”for details.
Installation
GND
Sig+
RLY
GND
Sig+
RLY
Indicator etc.
24V
Gas Detector (SD-1OX)
Hazardous Location
(Zone 1)
Nonhazardous Location
Installation Diagram
CVVS Cable
24V

3 Product Components 3-1. Main unit and standard accessories
- 8 -
3
Product Components
3-1. Main unit and standard accessories
<Main Unit> (including a cable gland)
<Standard Accessories>
Operating manual
Dedicated handling lever (used for the wiring)
Dedicated control key
CAUTION
Use the supplied dedicated control key to operate the detector. If products other than these
accessories are used, key operations cannot be accepted properly.
Note that the control key is made of extremely strong magnet. Putting it close to a magnetic product,
such as a credit card and ID card, may damage the stored data.
Display
(forpower supply/signal)
Sensor part
External cable inlet

3 Product Components 3-2. Names and functions for each part
- 9 -
3-2. Names and functions for each part
(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
Display the gas concentration and so on.
NOTE
The nameplate on the front side of the detector (see the figure on the
right) shows the precautions to be taken for explosion-proof
performances. Read these precautions as well as "2. Important
Notices on Safety."
The detector manufactured in accordance with ATEX/IECEx
specifications has a nameplate on the front side that shows also the
serial number, date of manufacture etc.
INST.No.: Serial number
DATE : Date of manufacture
(8) Concentration value display
(5) Power lamp
(6) Alarm lamp
(7) Fault lamp
(1) MENU/ESC key
(2) SET key
(4) ▼ key
(3) ▲ key
<ATEX/IECEx Specifications>
<TIIS Specifications>

3 Product Components 3-3. Block diagram
- 10 -
3-3. Block diagram
<Electric Diagram>
Sensor
Controller
(CPU)
POWER INPUT (24 VDC)
Power supply part
1.Gas alarm contact (ALARM)
or
2.Fault contact (FAULT)
or
3.Select either gas alarm or
contact (ALARM/FAULT)
Contact activation
De-energized (De-energized
at a normal state)
ON-ALARM (Closed contact
at an alarm state)
Alarm contact controller
Display
（POWER）（ ALARM）（
FAULT)
Seven-segment LED
(four-digit)
Magnetic operation part
(MENU/ESC) (▲) (▼) (SET)
Transmitter
4 –20 mA transmission

4 How to Use 4-1. Before using the gas detector
- 11 -
4
How to Use
4-1. Before using the gas detector
Not only the first-time users but also the users who have already used the detector must follow the
operating precautions.
Ignoring the precautions may damage the gas detector, resulting in inaccurate gas detection.
4-2. Precautions for installation sites
Do not install the detector in a place with vibrations or shocks.
The detector consists of sensitive electronic parts. The detector must be installed in a stable place without
vibrations or shocks and it cannot drop.
Do not install the detector in a place exposed to water, oil or chemicals.
When selecting installation points, avoid a place where the detector is exposed to water, oil or chemicals.
Do not install the detector in a place where the range of operating temperatures is exceeded.
The detector must be installed in a stable place where the operating temperature is maintained and does
not change suddenly.
<ATEX/IECEx Specifications> -10 to +40°C
<TIIS Specifications> -10 to +40°C
Do not install the detector in a place exposed to direct sunlight or sudden changes in the temperature.
When selecting installation points, avoid a place where it is exposed to direct sunlight or radiant heat
(infrared rays emitted from a high-temperature object), and where the temperature changes suddenly.
Condensation may be formed inside the detector, or the detector cannot adjust to sudden changes in the
temperature.
Keep the detector (and its cables) away from noise source devices.
When selecting installation points, avoid a place where high-frequency/high-voltage devices exist.
CAUTION
This is a precision device. Because the detector may not provide the specified performance in some
places (environments), check the environment in the installation point, and then take appropriate
actions if necessary.
Because the detector plays an important role for safety and disaster prevention, as many units of
the detector as needed must be installed in appropriate points.
Because points where gases leak and remain easily are different depending on the types of gases
and the working areas, please decide carefully on installation points and the number of units to be
installed.

4 How to Use 4-3. Precautions for system designing
- 12 -
Do not install the detector in a place where maintenance of the detector cannot be performed or where
handling the detector involves dangers.
Regular maintenance of the detector must be performed.
Do not install the detector in a place where the machinery must be stopped when maintenance is performed
in its inside, where parts of the machinery must be removed to perform maintenance, or where the detector
cannot be removed because tubes or racks prevent access to it. Do not install the detector in a place where
maintenance involves dangers, for example, near a high-voltage cable.
Do not install the detector in machinery which is not properly grounded.
Before installing the detector in machinery, the machinery must be grounded properly.
Do not install the detector in a place where interference gases exist around it.
The detector must not be installed in a place where interference gases exist around it.
4-3. Precautions for system designing
Using a stable power supply
The external output and alarm contact of the detector may be activated when the power is turned on, when
momentary blackout occurs, or while the system is being stabilized. In such cases, use a UPS
(uninterruptible power supply), or take appropriate actions on the receiving side.
The detector must be provided with the following power supply.
Power supply voltage
24 VDC±10%: Terminal voltage of the detector
Allowed time of
momentary blackout
Up to 10 milliseconds
(To recover from the momentary
blackout for 10 milliseconds or more,
restart the detector.)
Example of actions
To ensure continuous operation and
activation, install a UPS outside the
detector.
Others
Do not use it with a power supply of
large power load or high-frequency
noise.
Example of actions
Use a line filter to avoid the noise source
if necessary.
Introducing protective measures 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 problems. Because lightning acts as a
large emission source while cables act as a receiving antenna, devices connected to the cables may be
damaged.
Lightning cannot be prevented. Cables installed in a metal conduit or under the ground cannot be
completely protected from inductive lightning surge caused by lightning. Although complete elimination of
disasters caused by lightning is impossible, the following protective measures can be taken.
CAUTION
An unstable power supply and noise may cause malfunctions or false alarms.
The descriptions in this section must be reflected on the designing of a system using the detector.
WARNING
An oxygen detector is affected by pressure. If the detector is used at a pressure other than
atmospheric pressure, a calibration is required under that pressure. The maximum allowable
pressure is 110 KPa. The detector cannot be used under reduced pressure. Using the detector at a
pressure exceeding the allowable range may cause a trouble in the oxygen sensor performance.

4 How to Use 4-3. Precautions for system designing
- 13 -
Protection against
lightning
Take appropriate measures in accordance with the importance of the facilities and the
environment.
Provide protection by a lightning arrester (cable arrester).
(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.
Proper use of alarm contact
The alarm contact of the detector is used to transmit signals to activate an external buzzer, alarm lamp or
rotating lamp. Do not use the detector for controlling purpose (e.g., controlling the shutdown valve).
The specifications for the alarm contact of the detector are based on the resistance load conditions. If
inductive load is used at the alarm contact, the following errors will occur easily because counter
electromotive force is generated at the contact.
Deposition, defective insulation or defective contact at the relay contact
Damage of any electric parts due to high-voltage generated inside the detector
Abnormal operations by an out-of-control CPU
If load is to be activated, appropriate measures must be taken to stabilize the operation of the detector and
protect the alarm contact referring to the following information.
Relay it with an external relay at a lower voltage of 100 VAC or below (contact amplification). At the
same time, the surge absorbing part SK1 suitable for the specifications must be attached to the
external relay.
In addition, the surge absorbing part SK2 must be attached to the loaded side of the external relay if
necessary.
It may be recommended that the surge absorbing part should be attached to the contact for certain
load conditions. It must be attached to an appropriate position by checking how the load is
activated.
CAUTION
In principle, do not activate inductive load at the alarm contact of the detector. (In particular,
never use the inductive load to activate a fluorescent lamp or motor.)
If inductive load is activated, relay it with an external relay (contact amplification). However,
because the coil of an external relay also involves inductive load, select a relay at a lower
voltage (100 VAC or below), and then protect the contact of the detector with an appropriate
surge absorbing part, such as a CR circuit.

4 How to Use 4-4. How to install
- 14 -
4-4. How to install
<Installation Dimensions and Maintenance Space>
The following installation requirements must be met to install the detector.
Attach the detector on the wall and others using four M5 screws.
SD-1OX
* SK1, SK2: Surge absorbing parts
Alarm contact
Coil
Load
Power
supply
External relay
(low voltage relay)
Power
supply
CAUTION
Do not install the detector in a place where maintenance of the detector cannot be performed or
where handling the detector involves dangers.
Regular maintenance of the detector must be performed.
Do not install the detector in a place where the machinery must be stopped when maintenance is
performed in its inside, where parts of the machinery must be removed to perform maintenance, or
where the detector cannot be removed because tubes or racks prevent access to it. Do not install
the detector in a place where maintenance involves dangers, for example, near a high-voltage
cable.

4 How to Use 4-5. How to wire
- 15 -
4-5. How to wire
<Recommended Cables>
3-wire (when the contact is not used)
CVVS equivalent 1.25 sq/3-core
5-wire (when the contact is used)
CVVS equivalent 1.25 sq/5-core
Detector head installation direction
WARNING
Install the detector head in the specified direction.
Installing it in a wrong direction may cause abnormal readings.
Install the detector while giving due consideration to the conditions for the detection area.
Normally, when the detector is used to detect oxygen deficiency, the detector head should be
installed at a face level.
When there is a risk of oxygen deficiency due to a gas heavier than the air (CO2 etc.), install
the detector in consideration for the specific gravity of the gas.
Do not install the detector in a damp place where condensation occurs. Water drops formed on
the sensor may cause abnormal detection.
CAUTION
Be careful not to damage the internal electronic circuit when wiring. In addition, be careful not
to apply stresses on the detector when (overweight) cables are installed.
The power cables and signal cables must not be installed together with the motor power cables
etc. When these cables must be installed together for unavoidable reasons, put the power
cables and signal cables in a metal conduit. The conduit must be connected to a grounding
circuit.
When stranded wires are used, prevent wires from contacting each other.
Use the dedicated handling lever to wire.
Use appropriate cables to wire.

4 How to Use 4-5. How to wire
- 16 -
<Parts. length table of outside conductor lead-in>
Cable overall outer
diameter(mm)
Rubber seal inner
diameter(mm)
Washer inner
diameter(mm)
Clamp inner
diameter(mm)
From Φ9.6 to less than Φ10.5
Φ11
Φ12
Φ10.8
From Φ10.5 to less than Φ11.5
Φ12
Φ12
Φ11.8
From Φ11.5 to less than Φ12.5
Φ13
Φ14
Φ12.8
From Φ12.5 to less than Φ13.0
Φ13.5
Φ14
Φ13.8
NOTE
The following table shows an example of overall outer diameters of cables. Use them for reference.
The overall outer diameters must be checked because they somewhat vary between manufacturers.
Number of core
CVV 1.25 sq
CVV 2 sq
CVVS 1.25 sq
CVVS 2 sq
2
ø9.5
ø10.5
ø10.0
ø11.0
3
ø10.0
ø11.0
ø10.5
ø11.5
4
ø10.5
ø11.5
ø11.0
ø12.0
5
ø11.5
ø12.5
ø12.0
ø13.0
6
ø12.5
ø13.5
ø13.0
ø14.0
φ 23

4 How to Use 4-5. How to wire
- 17 -
<Figure of Terminal Plate>
24 VDC
DC+
1
- (Common)
2
4 - 20 mA
Sig+
3
Contact
4
Contact
5
<Specifications of Terminal Plate>
Specifications of terminal plate
Rated voltage: 250 VAC
Rated current: 12 A
However, it depends on cables to be used.
Connection conditions
Cables: 0.25 - 2.5 mm2
Bare wire length: 8 - 9 mm
Connecting tool: Dedicated handling lever (accessory) or driver (edge 3.5 x 0.5 mm)
Grounding terminal
CAUTION
The specified bare wire length must be observed when the wire insulation is peeled off.
Improper clamping of the wire due to a shorter bare wire length may cause defective electric
conduction or heating.
Catching the wire insulation due to a shorter bare wire length may cause defective electric
conduction or heating.
Exposing the wire due to a longer bare wire length may cause defective insulation or a short circuit.
Be careful not to break up the wire. If the wire is broken up when inserted to the terminal, this may
cause defective insulation or heating.
８～９mm
8 - 9 mm