Riken Keiki GP-147 User manual

PT1E-1110
Combustible Gas Detection Alarm System
GP-147
Operating Manual

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<Contents>
1. Outline of the Product..............................................................................................................3
1-1. Preface....................................................................................................................................3
1-2. Purpose of use ........................................................................................................................3
1-3. Definition of DANGER, WARNING, CAUTION and NOTE.....................................................4
2. Important Notices on Safety ....................................................................................................5
2-1. Danger cases ..........................................................................................................................5
2-2. Warning cases ........................................................................................................................6
2-3. Precautions .............................................................................................................................7
3. Product Functions....................................................................................................................8
3-1. Outline drawing .......................................................................................................................8
3-2. Product components and names ............................................................................................9
3-3. Installation diagram...............................................................................................................11
3-4. Names and functions for each part .......................................................................................12
3-5. Block diagram .......................................................................................................................14
4. How to Use ............................................................................................................................15
4-1. Before using the alarm system .............................................................................................15
4-2. Precautions for installation sites ...........................................................................................16
4-3. Precautions for system designing.........................................................................................17
4-4. Grounding .............................................................................................................................19
4-5. How to install.........................................................................................................................20
4-6. Connection between devices ................................................................................................22
4-7. Wiring ....................................................................................................................................23
5. How to Operate......................................................................................................................25
5-1. Preparation for start-up .........................................................................................................25
5-2. Basic operating procedures ..................................................................................................26
5-3. How to start the alarm system ..............................................................................................27
5-4. Detection mode .....................................................................................................................28
5-5. Gas test mode.......................................................................................................................32
5-6. Alarm test mode ....................................................................................................................33
5-7. Simplified calibration (zero/span adjustment) .......................................................................34
5-8. UPS unit operation (* for the case of UPS specification)......................................................36
5-9. How to exit ............................................................................................................................38
6. Operations and Functions .....................................................................................................39
6-1. Gas alarm activation .............................................................................................................39
6-2. Fault alarm activation............................................................................................................40
6-3. Gas alarms triggered by a factor unrelated to gas detection................................................41
6-4. Other functions......................................................................................................................41
7. Maintenance ..........................................................................................................................43
7-1. Maintenance intervals and items ..........................................................................................43
7-2. Regular maintenance mode..................................................................................................45
7-3. Calibration method................................................................................................................62
8. Storage, Relocation and Disposal .........................................................................................64
8-1. Procedures to store the alarm system or leave it for a long time .........................................64
8-2. Procedures to relocate the alarm system or use it again .....................................................64
8-3. Disposal of products .............................................................................................................64
9. Troubleshooting .....................................................................................................................65
10. Product Specifications .........................................................................................................67
10-1. Specifications ......................................................................................................................67
10-2. List of accessories ..............................................................................................................70
11. Definition of Terms ...............................................................................................................71
Appendix. Power Consumption Calculation Method and Simplified Safety Period Chart ...........72

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 combustible gas detection alarm system GP-147.
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 alarm system and its specifications. It contains information required for
using the alarm system 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 alarm system.
1-2. Purpose of use
This product is a combustible gas detection alarm system designed exclusively for the detector head
using combustible gas sensor.
The alarm system is a safety unit, not an analyzer or densitometer which performs
quantitative/qualitative analysis/measurement for gases. Please fully understand the features of the
alarm system before using it, so that it can be used properly.
A combustible gas that leaked into the air is detected by a combustible gas detector head connected to
the indicator/alarm system.
As a detection result, gas concentration is displayed on the LCD (bar meter display (green and red)).
Gas concentrations are displayed in different colors according to danger levels, i.e., in green when the
alarm setpoint is not exceeded, and in red if the alarm setpoint is reached or exceeded.
The alarm system is equipped with the gas alarm contacts of two individual outputs "(First gas alarm
contact) + (First gas alarm contact [standard] or Fault alarm contact [option])".
The base unit provides a common alarm contact, common alarm voltage output (0/6/12 VDC
[standard]), contact output for an external buzzer and 24 VDC (load: 10 mA or less) voltage output.
The alarm system can incorporate a UPS (uninterruptible power system) battery to continue gas
detection in the event of a blackout.

1 Outline of the Product 1-3. Definition of DANGER, WARNING, CAUTION and NOTE
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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
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2
Important Notices on
Safety
2-1. Danger cases
DANGER
This is not an explosion-proof unit.

2 Important Notices on Safety 2-2. Warning cases
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2-2. Warning cases
WARNING
Specified devices
Connect only the combustible gas detector heads provided by RIKEN KEIKI to the alarm system.
Otherwise, the alarm system or equipment connected to it may be damaged.
Power supply
Before turning on the alarm system, always check that the voltage is properly applied.
Do not use an unstable power supply because it may cause malfunctions.
Need of protective grounding
Do not cut the protective grounding wire inside or outside the alarm system or disconnect the wire
from the grounding terminal.
Defects in protective functions
Check the protective functions, such as protective grounding and fuse, for a defect. If any defect
in protective grounding or other protective functions is suspected, do not operate the alarm
system.
Fuse
To prevent fire, use a fuse with the specified ratings (current, voltage and type) for the alarm
system.
Turn the POWER switch OFF and cut the mains power before replacing a fuse.
Do not use an unspecified fuse or short-circuit the fuse holder.
Operation in a gas
Do not operate the alarm system in a place where combustible/explosive gases or vapors are
present. Operating the alarm system in such an environment will lead to extreme dangers.
External connection
Before connecting the alarm system to a detection target or external control circuit, securely
connect it to a protective grounding circuit.
Maintenance of internal parts
Before replacing internal parts or performing any work with the door open, make sure to turn the
power switch OFF.
Response to a gas alarm
There are extreme dangers if a gas exceeding an alarm setpoint is detected. Take proper actions
based on your judgment.

2 Important Notices on Safety 2-3. Precautions
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2-3. Precautions
CAUTION
Do not use a transceiver near the alarm system.
Radio wave from a transceiver or other radio wave transmitting device near the alarm system or
its cables may disturb readings.
To restart the alarm system, you must wait 5 seconds or more before doing it.
Restarting the alarm system in less than 5 seconds may cause errors.
Do not use the external output of the alarm system to control other units.
This is not a control unit. It is not allowed to use the external output of the alarm system to control
other units.
Careful consideration should be given to instrumentation to maintain safety even when a
trouble like disconnection of power/signal cable or unexpected malfunction or failure occurs.
Be careful that it may be affected, in rare cases, by electrical noises, static electricity and
electromagnetic noises.
This is an electrical appliance. When the alarm system is used in an environment where electrical
noises, static electricity or electromagnetic noises may be generated,
take a protective measure beforehand.
Do not modify the alarm system or change the settings if not necessary.
Disassembling/modifying the alarm system will invalidate the warranty of the performance.
Also, changing the settings without understanding the specifications may cause alarm
malfunctions.
We will not be liable for any accidents caused by these conditions. Please use the alarm system
properly in accordance with the operating manual.
Do not forget to perform a regular maintenance.
Since this is a safety unit, a regular maintenance on it and the detector head must be performed
to ensure safety.
Clean the unit by wiping it gently with a dry cloth. Do not use organic solvents such as alcohol
and benzine, detergent or cleaner.
Always perform zero adjustment after cycling the power, recovering from a blackout, etc.

3 Product Functions 3-1. Outline drawing
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3
Product Functions
3-1. Outline drawing
Mounting hole (back of the case)
2 – 8-point model: 2 pcs
10 – 12-point model: 3 pcs
Base unit
Indicator unit (2-point model)
Mounting hole (back of the case, used by
10/12-point model only)
ø21.5 (n+2) pcs
Cable lead-in port (punched to use)
ø7 mounting hole (back of the case)
2 – 8-point model: 2 pcs
10 – 12-point model: 3 pcs

3 Product Functions 3-2. Product components and names
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3-2. Product components and names
The alarm system consists of a base unit and indicator unit (4-point model or more).
The base unit consists of a buzzer part and indicator part (2-point model), and the indicator unit consists of
an indicator part (2-point model).
In addition to the indicator part, the base unit incorporates a switching regulator and UPS (uninterruptible
power system) battery (*).
* For the case of UPS specification
<Appearance>
ＰＰ１Ｐ２
□
2 305 297 276
□
4 395 387 366
□
6 485 477 456
□
8 575 567 546
□
10 665 657 302 334
□
12 755 747 308 418
点数ｎ Ｗ Ｗ1 取付寸法
n: Number of points Installation dimension
Base unit
Indicator unit
Indicator part (2-point model)
Buzzer part

3 Product Functions 3-2. Product components and names
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<Inside Base Unit>
UPS battery (*)
Switching regulator
Pump switch
Power switch
Voice unit (option, Japanese
only)
Connector (CN6, 6P)

3 Product Functions 3-3. Installation diagram
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3-3. Installation diagram
Wall mounting type
Rack mounting type
n: Number of points
2 – 8-point: 4 pcs
10/12-point: 6 pcs
{(n/2) + 1} pcs
Rear cable lead-in port
Installation dimension
Installation Diagram for Wall Mounting Type
n: Numbe
r
of points
Number o
f
points
n
Cut hole dimension
A
Panel Cut for Rack Mounting Type
n: Number of points
M6 or ø7

3 Product Functions 3-4. Names and functions for each part
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3-4. Names and functions for each part
3-4-1. Base unit (buzzer part)
Number in
the figure Name Function
(1) POWER lamp (green) Power lamp. Lights up steadily during power-on.
(2)
BATT. VOLTAGE
bar meter
(green/orange)*
Indicates the battery voltage level with a bar meter.
(3) BATT. lamp (orange)* Lights up while the UPS is in operation, or blinks while a battery
discharge test is conducted.
(4) BATT. CHECK switch* Operated when a battery discharge test is conducted. (Turn ON for
over 3 seconds)
(5) Alarm lamp Lights up in red at a gas alarm state. It goes out when the alarm is
cleared.
(6) Buzzer Emits a buzzer sound at an alarm or fault state.
(7) BZ. STOP switch Stops a buzzer sound.
(8)
RESET switch Pressed to reset the gas alarm activation. While the alarm pattern
is self-latching,
pressing the RESET switch causes a change from self-latching to
non latching (auto-reset).
* For the case of UPS specification
(1) POWER lamp (green)
(3) BATT. lamp (orange)*
(2) BATT. VOLTAGE bar meter (green/orange)*
(4) BATT. CHECK switch*
(7) BZ. STOP switch
(8) RESET switch
(5) Alarm lamp
(6) Buzze
r

3 Product Functions 3-4. Names and functions for each part
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3-4-2. Indicator unit (same as the base unit indicator part)
Number in
the figure Name Function
(1) LCD display Displays gas concentration and status message.
(2) POWER lamp Power lamp.
(3) ALARM lamp Lights up at a gas alarm state.
(4) FAULT lamp Lights up at a fault state.
(5) MODE key Used for adjustment work.
(6) /ZERO key Used to select a maintenance mode item, increase/decrease a
reading in span adjustment or alarm test, etc.
(7) key Same as (6).
(8) TEST/SET key Used to enter the alarm test mode. Confirms a value, etc. in
each mode.
(9) POWER switch Power switch of each channel.
(10) Maintenance mode selector
switch (MAINT switch)
Used to switch to the target channel for zero or span
adjustment.
(11) Individual alarm contact output 2 Used as either gas alarm contact or fault alarm contact.
(Gas alarm contact used as standard)
(12) Individual alarm contact output 1 Used as gas alarm contact.
(13) External output signal Either 0/6/12 VDC or 4-20 mA output can be selected.
(0/6/12 VDC output selected as standard)
(14) Sensor terminal Connects a detector head.
(15) Pump output Used for the power supply of the pump of suction type detector head.
(3)
(7)
(8)
(2)
(1)
(5)
(6)
(11)
(13)
(14)
(15)
(4)
(9)
(10)
(12)

3 Product Functions 3-5. Block diagram
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3-5. Block diagram
Base unit
Buzzer part Indicator part
Lamps Switches
Lamps
Switches
Gas
concentration
level display
Buzzer
Gas
concentration
level display
Controlle
r
Power
supply
A
larm processing part
Common alarm contact
Voltage output
(0/6/12 VDC/24 V)
External buzzer contact CH1: AMP
Switching regulator
Controlle
r
CH2: AMP
UPS
battery
12 V 2.3 A x 2
A
larm processing part
/external signal
processing
• Individual alarm contact
• 0/6/12 V or 4 - 20 mA
Power input
100 - 120 VAC/
200 - 240 VAC
(50/60 Hz)
Detector head
(sensor)
Detector head
(sensor)

4 How to Use 4-1. Before using the alarm system
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4
How to Use
4-1. Before using the alarm system
Not only the first-time users but also the users who have already used the alarm system must follow the
operating precautions.
Ignoring the precautions may damage the alarm system, resulting in inaccurate gas detection.

4 How to Use 4-2. Precautions for installation sites
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4-2. Precautions for installation sites
CAUTION
Do not install the alarm system 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 alarm system.
When selecting installation points, avoid a place where the alarm system is exposed to liquids,
such as water, oil and chemicals.
Do not install the alarm system in a place where the temperature drops below -10°C or rises
over 50°C.
The operating temperature of the alarm system is -10 to 50°C. The alarm system must be
installed in a stable place where the operating temperatures are maintained and do not change
suddenly.
Do not install the alarm system in a place with vibrations or shocks.
The alarm system consists of sensitive electronic parts. It must be installed on a stable place
without vibrations, shocks and risk of drop, etc.
Keep the alarm system (and its cables) away from noise source devices.
When selecting installation points, avoid a place where high-frequency devices exist.
Do not place the alarm system next to a noise source device.
Do not run cables parallel to each other.
Do not place cables close to each other.
Do not install the alarm system in a place where detectable gases stay around.
Do not install the alarm system and perform detection in a place where detectable gases
remain.
Do not install the alarm system in a place where maintenance of the alarm system cannot be
performed or where handling the alarm system involves dangers.
Regular maintenance of the alarm system must be performed.
Do not install the alarm system 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 alarm system cannot be removed because tubes, racks,
etc. prevent access to it.
Do not install the alarm system in a place where maintenance involves dangers, for example,
near a high-voltage cable.
Do not install the alarm system in machinery which is not properly grounded.
Before installing the alarm system in machinery, the machinery must be grounded properly.

4 How to Use 4-3. Precautions for system designing
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4-3. Precautions for system designing
(1) Using a stable power supply
Note that the external output and alarm contact of the alarm system 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 (uninterruptible power system), or take appropriate actions on the receiving side.
The alarm system must be provided with the following power supply.
Power supply
voltage
100 - 120 VAC or 200 - 240 VAC, 50/60 Hz
(terminal voltage of the main unit)
Allowed time of
momentary
blackout
Approx. 100 msec. (without suction type
detector head)
(To recover from the momentary blackout
for 100 msec. or more, restart the alarm
system.)
Example of actions
Install a UPS, etc. outside the alarm
system to ensure continuous operation
and activation.
Others
Do not use the alarm system with a power
supply of large power load or
high-frequency noise.
Example of actions
Use a line filter, etc. to avoid the noise
source if necessary.
(2) Heat radiation designing
When the alarm system is installed in a closed instrumentation panel or the like, attach ventilation fans
above and below the panel.
(3) Protection against lightning
What is lightning
surge?
If cables are installed outside the factory, plant, etc., or if internal cables are installed
in the same duct as the cables coming from the outside, "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.
Protection
against lightning
Although complete elimination of disasters caused by lightning is impossible, the
following protective measures can be taken.
Take appropriate measures in accordance with the importance of the facilities and
the environment.
Connect the transmission signal route, etc. by using optical fiber or the like.
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 devices
from these noise sources, the devices must be grounded.
* A lightning arrester has a circuit to remove a surge voltage which damages field devices.
Therefore, signals may be attenuated by installing the arrester. 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 alarm
system.

4 How to Use 4-3. Precautions for system designing
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(4) Alarm contact
The alarm contact of the alarm system is used to transmit signals to activate an external buzzer or alarm
lamp. Do not use the alarm system for controlling purpose (e.g., controlling the shutdown valve).
The specifications for the alarm contact of the alarm system 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 voltage 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 alarm system
Abnormal operations by an out-of-control CPU
Unexpected noise may enter the contact regardless of inductive load, thus posing a risk of above
errors.
* Followings are examples of inductive load.
Revolving light, external relay, buzzer, siren, fan, fluorescent lamp, motor, etc.
If load is to be activated, appropriate measures must be taken to stabilize the operation of the alarm system
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
The "b" contact (break contact) under de-energized state may be opened momentarily by a physical
shock, such as external force.
When the "b" contact is selected for the alarm contact, take appropriate actions to prepare for a
momentary activation, for example, add signal delay operation (approximately 1-second) to the
receiving side of the "b" contact.
CAUTION
In principle, do not activate inductive load at the alarm contact of the alarm system. (In
particular, never use the inductive load to activate a fluorescent lamp, motor, etc.)
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 alarm system with an
appropriate surge absorbing part, such as a CR circuit.

4 How to Use 4-4. Grounding
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4-4. Grounding
Connect the earth terminal to your grounding terminal.
* SK1, SK2: Surge absorbing parts
Power
supply
Load
Coil
Power
supply
External relay
(low voltage relay)
A
larm contact
WARNING
Before turning on the alarm system, never fail to connect the earth terminal to a grounding terminal.
Terminal
For stable operation of the alarm system and safety, it must be connected to a grounding terminal.
Never connect the grounding wire to a gas pipe. The grounding must be made as D type grounding
(below 100 Ωof grounding resistance).

4 How to Use 4-5. How to install
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4-5. How to install
4-5-1. How to install the wall mounting type unit
<4 - 8-point Model>
Screw each four fixing screw to the four corners on the wall.
* Be careful not to get your fingers caught by the upper door which may be closed by shaking the main
unit hard during installation.
<10/12-point Model>
Screw each four fixing screw to the four corners and two points of the indicator unit next to the base unit (six
areas in total).
* Be careful not to get your fingers caught by the upper door which may be closed by shaking the main
unit hard during installation.
Mounting hole (4 areas)
Mounting hole (6 areas)