Riken Keiki SD-1RI User manual

PT2E-2236
Smart transmitter/Gas Detector Head
SD-1RI
（TYPE HS）
Operating Manual
(PT2E-195)
(PT2-195)
(INS-1907 Ver.5)

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. 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.
If use as safety instrumentation device, determine the specification and manage it based on the safety
manual.
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.
5. This detector is SIL2 ceritified for single application. SIL 2 is Safety Integrity Level by safety
instrumentation functioning omni-PFD avg .If use as safety instrumentation device, determine the
specification and manage it based on the safety manual.

Operating Precautions
- 1 -
<Contents>
Outline of the Product............................................................................................................... 1
1-1. Preface.............................................................................................................................. 1
1-2. Purpose of use .................................................................................................................. 1
1-3. Definition of DANGER, WARNING, CAUTION, and NOTE............................................... 1
1-4. Method of confirmation for Standards and Explosion proof specification .......................... 2
Important Notices on Safety ..................................................................................................... 3
2-1. Danger cases .................................................................................................................... 3
2-2. Warning cases .................................................................................................................. 4
2-3. Precautions ....................................................................................................................... 5
2-4. Safety Information ............................................................................................................. 6
Product Components................................................................................................................ 8
3-1. Gas detector and standard accessories............................................................................ 8
3-2. Names and functions for each part ................................................................................... 9
3-3. Block diagram ................................................................................................................... 10
How to Use............................................................................................................................... 11
4-1. Before using the detector .................................................................................................. 11
4-2. Precautions for installation points...................................................................................... 11
4-3. Precautions for system designing ..................................................................................... 12
4-4. How to install..................................................................................................................... 13
4-5. Installation procedure........................................................................................................ 14
4-6. How to wire ....................................................................................................................... 16
How to Operate ........................................................................................................................ 20
5-1. Preparation for start-up ..................................................................................................... 20
5-2. Basic operating procedures............................................................................................... 20
5-3. How to start the detector ................................................................................................... 21
5-4. Modes ............................................................................................................................... 22
5-5. Maintenance Mode(User).................................................................................................. 23
5-6. How to exit ........................................................................................................................ 25
Operations and Functions ........................................................................................................ 26
6-1. Gas alarm activation ......................................................................................................... 26
6-2. Fault alarm activation ........................................................................................................ 27
6-3. Warning activation............................................................................................................. 27
6-4. External output operation .................................................................................................. 28
6-5. Other functions.................................................................................................................. 29
Maintenance............................................................................................................................. 30
7-1. Maintenance intervals and items....................................................................................... 30
7-2. Proof Test .......................................................................................................................... 32
7-3. Parts replacement ............................................................................................................. 32
Storage, Relocation and Disposal ............................................................................................ 33
8-1. Procedures to store the detector or leave it for a long time............................................... 33
8-2. Procedures to relocate the detector or use it again........................................................... 33
8-3. Disposal of products.......................................................................................................... 33
Troubleshooting........................................................................................................................ 34
Product Specifications.............................................................................................................. 36
10-1. List of specifications ........................................................................................................ 36
10-2. Detection principle........................................................................................................... 41
Definition of Terms.................................................................................................................... 42

1 Outline of the Product 1-1. Preface
- 1 -
1
Outline of the Product
1-1. Preface
Thank you for choosing our smart transmitter/gas detector head SD-1RI. 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.
The detector has HART communication function.
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.

1 Outline of the Product 1-4. Method of confirmation for Standards and Explosion proof specification
- 2 -
1-4. Method of confirmation for Standards and
Explosion proof specification
This instrument has some specification depends on standard and explosion proof certificate. Please
confirm the detector specification before using. Please refer Declaration of Conformity that is at the end of
this manual if you have CE marking type. You can confirm instrument specification to see name plate as
follows.
ATEX/IECEx, CE marking type name plate TIIS type name plate
TIIS certificate
Ex marking
CE marking

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 conditions 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.
Nitrile rubber (NBR) is used for the cable gland component. The organic solvents and alkalis (liquid
or vapor) present in the measurement environment may not be able to maintain the explosion-proof
performance.

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.
Zero adjustment in the atmosphere
When the zero adjustment is performed in the atmosphere, check the atmosphere for freshness before
beginning the adjustment. If other gases exist, the adjustment cannot be performed properly, thus
leading to dangers when the gas leaks.
Response to a gas alarm
Issuance of a gas alarm indicates that there are extreme dangers. Take proper actions based on your
judgment.

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 near the detector or its cables may disturb commands. If a transceiver 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 within 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.
Do not forget 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 compromise 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-1RI (TYPE HS).
<ATEX/IECEx Specifications>
The Model SD-1RI is a fixed mount, continuous-monitoring detector head and provides a 4-20mA signal
which indicates the target gas reading for use by a gas monitoring controller, recording device, or
programmable controller.
Technical Data
(Protection Method) Flameproof enclosure “d”
(Certificate Numbers) IECEx PRE 20.0069X
PRESAFE 20 ATEX 63097X
(Group) II
(Category) 2G
(Type of Protection and Marking code) Ex db IIC T6
(Equipment Protection Level) Gb
(Ambient Temperature)* -20C to +60C
(Electrical Data) Supply voltage: 24 VDC±10% (Typ.)
Output signal (4 to 20 mA) : 24VDC 22mA
(Applicable Standard) IEC 60079-0: 2017，IEC 60079-1: 2014-06
EN IEC 60079-0: 2018，EN 60079-1: 2014
(ManualNumber) PT2E-195
* 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.
Specific conditions of “X”-mark:
Regarding ATEX specification, the measuring function according to Annex II paragraph 1.5.5 of the Directive
is not covered by this EU-type examination.
It shall comply with the requirements from the relevant European harmonized standards which provide
guidance on the performance of gas detection equipment and safety devices.
The flameproof joints not intended to be repaired.
Installation
24V
GND
＋
－
Hazardous Location
(
Z
o
n
e
1
)
Gas Detector (SD-1RI)
←→
Installation Diagram
Signal ＋ ＋ Signal
CVVS Cable
Indicator etc.
Nonhazardous Location
－ Signal
Signal －
24V
GND

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: 24VDC±10% 85mA
Analogsignaloutput:24VDC 22mA
(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
24V
GND
＋
－
Hazardous Location
(
Z
o
n
e
1
)
Gas Detector (SD-1RI)
←→
Installation Diagram
Signal ＋ ＋ Signal
CVVS Cable
Indicator etc.
Nonhazardous Location
－ Signal
Signal －
24V
GND

3 Product Components 3-1. Gas detector and standard accessories
- 8 -
3
Product Components
3-1. Gas detector and standard accessories
<Main Unit> (including a cable gland or an adapter)
【ATEX/IECEx Specification】
【TIIS Specification】
Adapter A (NPT1/2)
Cable gland (G3/4)

3 Product Components 3-2. Names and functions for each part
- 9 -
<Standard Accessories>
Operating manual･･････････････････ one
Safety manual・・・･･････････････････ one
Dedicated handling lever ･･･････････ one
Dedicated control key････････ The supplied quantity depends on the number of units to be delivered.
1 to 10 units one
11 to 20 units two
21 to 50 units three
over 51 units four
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 Displays the gas concentration and so on.
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.
(8) Concentration
value display
(5) Power lamp (6) Alarm lamp (7) Fault lamp
(1) MENU/ESC key
(2) SET key (4) key
(3) key

3 Product Components 3-3. Block diagram
- 10 -
3-3. Block diagram
<Electric Diagram>
Sensor
Controller
(CPU)
POWER INPUT (24 VDC)
Power supply part Display
（POWER）（ALARM）（FAULT)
Seven-segment LED
(four-digit)
Magnetic operation part
(MENU/ESC) (▲) (▼) (SET)
Transmitter
・4 – 20 mA transmission
・HART Communication

4 How to Use 4-1. Before using the detector
- 11 -
4
How to Use
4-1. Before using the detector
Not only the first-time users but also the users who have already used the product must follow the operating
precautions.
Ignoring the precautions may damage the detector, resulting in inaccurate gas detection.
4-2. Precautions for installation points
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 do not
change suddenly.
*For operating temperature range, see “10-1. List of specifications” for details.
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 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 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 other gases exist around it.
The detector must not be installed in a place where other 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 when the system is being stabilized. In such cases, use a UPS, or take
appropriate actions on the receiving side of output signals.
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 30 milliseconds
(To recover from the momentary
blackout for 30 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.
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.
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.

4 How to Use 4-4. How to install
- 13 -
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.
Tighten the hexagon socket head cap screws fixing the lid and the main body with the tightening torque of
215.6±24.5N･cm.
When closing the lid of the detector, please wipe the screw and the mating surface of the main body and
the lid, and apply our company-specified grease.
NOTE
・Hexagon socket head cap screws with strength class "A2-70" are used.
When you lost or replace it, we recommend that you ask our local sales office nearest you.
・Our company-specified grease : BARRIERTA JFE 552（NOK KLUBER made）
If you can not prepare the specified grease, please use one that meets the following requirements.
1. Those not cured by deterioration
2. Those containing no volatile solvent
3. Those which do not cause corrosion on joint surfaces
4. Those not including silicon type
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.
150mm
193mm

4 How to Use 4-5. Installation procedure
- 14 -
4-5. Installation procedure
<ATEX/IECEx Specification>
The ATEX / IECEx specification comes with adapter A (NPT 1/2) as
standard. Please prepare the Ex cable gland that is suitable for the adapter
<TIIS specifications>
Cable gland, Rubber seal, Washer and Eccentric washer are mounted on SD-1RI main body as shown
below.
Attach the parts :
Pass a Cable (e.g. CVVS) through the Cable gland, Eccentric washer, Washer, and Rubber seal, and
drawn into detector inside. (For wire methods, see "4-6 How to wire".) When installing the cable gland, wipe
the cable gland mounting part, the hexagon socket set screw, the grounding screw, and the cable gland and
wipe the specified grease.
Tightens Cable gland, and then tightens hexagon socket set screw (M4×6), and fix cable gland.
WARNING
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.
CAUTION
Tighten 40 Nꞏm or larger torque value to ensure the tightening cable gland and seal plug.
Tighten the hexagon socket head cap screws fixing the cable gland with the tightening torque of 107.8
±12.7N･m.
Rubber seal
Hexagon socket set screw
（M4×6）
Cable gland
(
G3/4
)
Daub screw with
g
rease
Washe
r
Eccentric washe
r
Grounding screw
Cable gland mounting part
Cable gland side
Washer side
Please mind direction of
Eccentric washer
Cable
（CVVS etc.）
Main unit case
Rubber seal
Washer
Eccentric washer
Cable gland
(G3/4)
Cable gland section view
Adapter
(NPT1/2)

4 How to Use 4-5. Installation procedure
- 15 -
NOTE
・Our company-specified grease : BARRIERTA JFE 552 (manufactured by NOK KLUBER)
If you can not prepare the specified grease, use one that meets the following requirements.
1. Material does not harden due to deterioration
2. Volatile solvent-free
3. Material does not cause corrosion at the surface
4. Silicon-free
5. Validation of suitability depends on the specifications of grease manufacturer

4 How to Use 4-6. How to wire
- 16 -
4-6. How to wire
<Recommended Cable>
3-wire CVVS1.25 mm2 or 2.0mm2 - 3-core
4-wire CVVS1.25 mm2 or 2.0mm2 - 4-core
<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 Φ10.5 Φ11 Φ12 Φ10.8
From Φ10.5 to Φ11.5 Φ12 Φ12 Φ11.8
From Φ11.5 to Φ12.5 Φ13 Φ14 Φ12.8
From Φ12.5 to Φ13.0 Φ13.5 Φ14 Φ13.8
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.
φ

4 How to Use 4-6. How to wire
- 17 -
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 1.25mm2CVV 2 mm2CVVS 1.25 mm2CVVS 2 mm2
2 Φ9.5 Φ10.5 Φ10.0 Φ11.0
3 Φ10.0 Φ11.0 Φ10.5 Φ11.5
4 Φ10.5 Φ11.5 Φ11.0 Φ12.0
5 Φ11.5 Φ12.5 Φ12.0 Φ13.0
6 Φ12.5 Φ13.5 Φ13.0 Φ14.0
<Figure of Terminal Plate>
DC24V
DC+ 1
DC- 2
4-20mA
+
HART
Sig+ 3
Sig- 4
<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)
<When 4-20mA output is not used>
This detector has a self-diagnosis function which shows E-9 on LED display when 4-20mA is not properly
outputted.
If 4-20mA output is not necessary, connect the following fixed resistance (lead type) to the terminal 2 and 3
(”Sig+” and “-(common)”).
Resistance value : 100-300ΩRated power : 0.25W or more
Insert a cable and the above resistance together into Terminal 2 (common), and insert lead part of the
resistance into terminal 3 (Sig+). After that, check the immovability.
Grounding
terminal