Riken Keiki OX-591 Instruction Manual

PT1E-0899
FOR USERS
OPERATING INSTRUCTION MANUAL
FOR
INDICATOR/ALARM UNIT OX-591

1
Table of Contents
１．PRODUCT OUTLINE
１－１．In the beginning...................................................... ３
１－２．Application for use................................................... ３
１－３．Identification of each caution marks.................................. ３
１－４．Method of confirmation for CE marking type............................ ４
２．IMPORTANT INSTRUCTION FOR THE SAFETY
２－１. Danger items ......................................................... ５
２－２. Warning items ........................................................５
２－３. Caution items ........................................................６
３．PRODUCT FUNCTION
３－１．External drawing...................................................... ７
３－２．Appearance............................................................ ７
３－３．Panel cut-out dimensions.............................................. ８
３－４. Name of each part and function........................................ ９
３－５．Block diagram......................................................... １０
４．HOW TO USE
４－１. Before operation...................................................... １１
４－２. Mounting/dismounting procedure........................................ １１
４－３．Installation place.................................................... １２
４－４．Caution in the system engineering..................................... １３
４－５．Grounding............................................................. １５
４－６. Wiring ............................................................... １６
５．OPERATION METHOD
５－１. Preparation for start up.............................................. １７
５－２．Basic performance flow................................................ １７
５－３. Start-up procedure
５－３－１．Power on ..................................................... １８
５－４．Explanation of performance(Detection mode)
５－４－１. Display action ............................................... １９
５－４－２. External output action ....................................... ２０
５－５. Maintenance and adjustment
５－５－１. Maintenance mode.............................................. ２１
５－５－２. Adjustments
５－５－２－１. Span adjustment
(for the prevention of oxygen deficiency) ............ ２２
５－５－２－２. Zero adjustment (for the general detection)........... ２３
５－５－３. Confirming an alarm level..................................... ２４
５－５－４. Changing an alarm level....................................... ２４
５－５－５. Confirming the peak hold level................................ ２５
５－５－６. Alarm test ................................................... ２６
５－６. Stopping the Operation ............................................... ２６

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６．KIND OF ALARM AND ITS FUNCTION
６－１．Kind of alarm.........................................................２７
６－２． Gas alarm
６－２－１.Gas alarm action............................................... ２７
６－２－２.Responding to gas alarm........................................ ２８
６－２－３.Alarm other than gas detection................................. ２８
７．MAINTENANCE AND CHECK
７－１．Checking interval and check items
７－１－１.Daily check ................................................... ２９
７－１－２.Regular maintenance check...................................... ２９
７－２.Maintenance contract for regular check................................. ２９
７－３．Replacing the parts................................................... ３０
７－４.Measures when operation is stopped or installation place is moved
７－４－１.Stopping the normal operation.................................. ３０
７－４－２.Changing the installation place................................ ３０
７－５.Storage or measures when the unit is not in use for a long time ........ ３０
８．SCRAP THE PRODUCT ........................................................... ３０
９．MAEASURES AT AN ABNORMAL CASE
９－１.Trouble alarm.......................................................... ３１
９－２.Responding to trouble alarm............................................ ３１
９－３.Before it is thought to be a trouble................................... ３１
９－４.Trouble shooting....................................................... ３１
１０．DEFINITION OF TERMS ....................................................... ３２
１１．PRODUCT SPECIFICATIONS
１１－１. Standard specifications............................................. ３３
１１－２. Product composition................................................. ３４

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１．PRODUCT ＯＵＴＬＩＮＥ
１－１．In the beginning
First of all, we wish to express our heartfelt thanks for your purchase of our indicator/alarm unit OX-591.
This instruction manual is just a guide book to operate indicator/alarm unit OX-591 of RM-590 series.
Your kind reading of this manual is requested not only for first user but for already experienced staff.
１－２．Application for use
○This is an exclusive indicator/alarm unit to be used in combination with our oxygen detector head to
indicate oxygen concentration for the control of oxygen deficiency prevention, etc.
○Oxygen is detected with a galvanic cell type oxygen detector head which is connected with this
indicator/alarm unit. Detection results are displayed with 4-digit LED indicator.
Spec.
Application
Detection range
Action
1st alarm
2nd Alarm
Prevention of
oxygen deficiency
0 ～25vol%
Lo-LoLo alarm
Lo
Lo
General detection
(Including
oxygen leakage)
0 ～5vol%
0 ～10vol%
0 ～25vol%
Hi-HiHi alarm
Hi
Hi
Lo-Hi alarm
Lo
Hi
0 ～50vol%
Lo-LoLo alarm
Lo
Lo
Take care that an alarm action and a relay output are different from application for use.
This operating instruction manual describes on the application for prevention of oxygen deficiency.
１－３．Identification of each caution marks
Indicates an imminently hazardous situation which, if not avoided, will result in
death or serious injury. This signal word is to be limited to the most extreme
situation.
Indicates a potentially hazardous situation which, if not avoided, could result in
death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, may result in
minor or moderate injury. It may also be used to alert against unsafe practices.
This means “ADVICE”at operation.
＊NOTE
DANGER
WARNING
CAUTION

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２－３．Caution items
・Do not use walky-talky, mobile phone, etc. near this unit.
When this unit receives the electric waves by walky-talky etc near from the cable, this will effect the
reading.
When use the walky-talky, operate it at the place where there is no influence of electric wave emission.
・When make power on again, make it after an interval of over 5 seconds.
When make power on within 5 seconds, there may be no normal operation.
・When operate it not to follow this manual, repair it by other rating parts or modify it on his own, the
safety and quality of products can not be secured. Then, when an accident take place by it, we
cannot assure our responsibility on them.
Take enough consideration for instrumentation to keep safety even if disconnection of power and
signal lines, defect of operation or trouble would be happen due to unexpected reason.
This is an electrical applied instrument.
Be care it may be effected by power noise, electrostatic and electromagnetic noise.
When use under such conditions, make protective treatment for use.
CAUTION

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３－５．Block diagram
Detector head (Sensor)
Amp part
Control part
Display part
（ＰＷ／ＴＲ）(ＳＫＩＰ)（ＡＬ１） （ＡＬ２）
Operation part
（ＭＯＤＥ） （ＵＰ） （ＤＯＷＮ） （ＳＥＴ）
POWER INPUT
(DC24V)
Power supply part
Gas alarm contact （ＡＬ１、ＡＬ２）
Trouble alarm contact
(ＴＲＯＵＢＬＥ)
※Standard setting
・Non-exciting
（Non-exciting at normal）
・a-contact
(Contact closes at alarm)
Alarm contact control part
4-20mA
transmission
Transmission part
OX-591

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４．HOW TO USE
４－１．Before operation
Be sure to keep caution items of use not only for first user but for already experienced staff.
If not keep these caution items, the unit may be defective and correct gas detection may not be performed.
４－２．Mounting/dismounting procedures
Indicator/alarm unit for RM-590 series shall be used after housing it in either exclusive single case or
multi-unit case.
(1) Mounting to the case
・Open the front cover of this unit.
・Confirm that the power switch is at OFF
・With the disengagement lever at down position, mount into the case.
（Confirm that the edge connector is put in firmly）
・Confirm that the disengagement lever is turned upward when indicator/alarm unit is mounted into the
case firmly.
・After confirmation of lever position, put ON the power switch, and then, close the cover.
(2) Removal of the unit
・Open the front cover of this unit.
・Confirm that the power switch is at OFF.
・Push disengagement lever down to release the lock.
・Pull out the unit from the case.
・Turn the lever upward and close the cover.
Mounting/dismounting of indicator/alarm unit shall be done according to
the above procedures. If not, stopping metal of the unit may be
transformed and the cover can not be closed.
CAUTION

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４－３．Installation place
Keep away the system from direct sun drought or where the temperature of the system is
drastically changed. If installed, inside the unit will be built up condensation and does not follow
the drastic temperature change.
The system consists of fine electronics parts.
Install them where to be stable not to crush or fall down.
Keep the system from the equipment which may give a high frequency in the surroundings and install
it.
・Do not put the system jointly each.
・Do not wire the cable in parallel nor take access.
.
Do not install and make gas detection at the place where the sample gas is deposited.
This unit is required to make maintenance regularly.
Then, do not install at the place where there is danger at maintenance time.
When required to stop the system at maintenance time, unable to maintain if not remove a part of
system or unable to detach the case due to the pipe or rack etc. do not install such place.
Be sure to ground when installing to the equipment.
Do not install at places where direct sun drought or where the temperature is drastically changed.
Do not install it where vibration or shocks may take place.
Keep the system from the equipment which may generate the noise (Unit & cable).
Do not install it where the detection gas is deposited around.
Do not install at the place where it is danger for maintenance service such as high voltage cable,
etc.
Do not install it where it is unable to make maintenance.
Equipment housing that grounding construction is not enough.
CAUTION

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４－４．Caution in the system engineering
Unstable power and noise may cause error of performance and alarm.
For the system to use this unit, it is required to make design based on this
manual descriptions.
(1) Stable power used
While the system gets stable at power failure, the external output and alarm contact may be on and the
care for it must be taken. In such case, use the standby battery or take an appropriate action in the
receiver side. Supply the following power to this unit .
Power voltage
DC２４V±１０％
Power failure
tolerance time
Approx 50msec.
（For power failure of 50msec, it re-starts）
To warrant the continuous operation, install the UPS
(Uninterrupted Power Supply) or standby battery outside.
Others
Do not share the power involving with high power load
and high frequency noise.
According to requirement, use line filter and separate it
from noise source.
(2) Designing to consider radiation
When install the closed self-standing control panel, mount the fans in the upper and lower part.
(3) Lightning measures
Lightning
surge
There is the problem “Lightning”. When make outdoor wiring of cable at factory or plants etc or
when make a parallel wiring in the same duct with the cable in from outdoor even at the indoor
wiring. If the lightning is a huge generation source, the cable is a reception antenna and there is
the case that cable connecting instrument is broken. It is impossible to prevent the generation of
lightning. If the cable should put in metal tube or laid in the underground, it is impossible to
prevent the inductive lightning surge generating from the thunder.
Lightning
measures
There is not the complete countermeasure for it but the following method can be considered.
Make the suitable treatment accordingly.
a) The transmission signal route is arranged for connection by the optical fiber cable etc.
b) Countermeasure by the lighting arrester (Cable safety retainer). There is the way to install
the lightning arrester just before the field apparatus and the central control station. The
position of the lightning arrester installation is at each point of cable laid out from the outdoor
to the indoor. The lightning arrester builds in the circuit to remove the surge voltage to be
the source for the damage of field apparatus (Protection resistor, zero diode etc.) and is
designed to protect the apparatus. But as the signal may be attenuated due to the lightning
arrester, check the action and it is required to use.
Grounding
Surge noise shall be generated from the thunder lightning or except it.
To protect detector from these cause, be sure to make grounding.
＊In the lightning rod, there is the circuit to remove the surge voltage to be a cause of damage from field
instruments.
By installing the lightning rod, the signal may be attenuated. When install the lightning rod, it is required to
check the performance in advance.
CAUTION

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(4) Alarm contact
・Alarm contacts shall be used only for external buzzer and alarm light, and do not use it for the controlling
use (such as solenoid valve control etc).
When control the external load, the bad influence may be given to the system according to the load
characteristics. In such case, the following countermeasure shall be taken to stabilize the action and
protect the contents.
・Relayed by the low voltage relay and operate by connecting CR circuit (Spark Killer: SK) (Diode etc for
DC) suited for relay coil directly to relay.
・Add CR circuit to the load side of relay on the request.
Reference: By the condition of load, CR circuit may be better to install in the contact side but it is required
to put in by checking the action of load.
ＳＫ：Surge absorption filter
－How to think alarm contacts against inductive load－
The spec for alarm contact of OX-591 is described by the conditions of resistive load.
When use the inductive load for alarm contacts, the very high reverse electromotive voltage may be
generated and the following trouble tends to be produced.
・Contact part of relay is melted adhesively and the contacts can not be activated.
・High voltage is put inside of indicator/alarm unit and then, electrical parts may be damaged.
・As it is big noise, the trouble action may be taken by the reckless drive of CPU.
・Irrespective of inductive load, there is the possibility of unforeseeable noise instruction for contact.
Above trouble may be generated.
Ｖ
SK
Load
Ｖ
SK
Coil
Power supply
Power supply
Relayed relay
(Low voltage relay)
Alarm contact
ＯＸ－５９１
CAUTION （FOR USE OF NORMALLY-CLOSED CONTACT）
Normally-closed contact (Break contact) at non-existing condition may change to open contact in a
moment due to physical shock.
Whenever alarm signals from gas detectors are used with normally-closed contact, please put
delayed-circuit (for about one second) to receiver side of normally-closed contact to avoid such
phenomenon.

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※As the inductive load, there are following samples.
・Revolving light * External relay * Buzzer *Siren *Fan *Fluorescent lamp * Motor etc.
４－５．Grounding
Make grounding with terminal .
Be sure to make grounding before putting power ON.
Be sure to make grounding for safety purpose and to keep stable operation of this unit.
Do not connect earth wire with gas pipe. Make grounding corresponding to D-class
grounding (Grounding resistance : below 100ohms).
CAUTION
・The inductive load shall not be used in principle (Do not use fluorescent lamp).
・When use the inductive load, make the contact amplification outside, but the outside relay coil
belong, use the relay driven by the low voltage (within AC100V) and it is protected by an
appropriate surge killer.
WARNING
Terminal

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４－６．Wiring
（In case of single case）
ＴＤ１
ＴＤ２
ＴＤ３
ＴＤ４
Maximum cable length ：600m
For multi-unit case, refer to operating instruction for multi-unit case.
Detector Head
TR : Common trouble alarm contact
Earth terminal
①
②
③
④
①
②
③
④
DC24V±10％
①
②
③
④
①
②
③
④
AL1 : 1st alarm contact output
AL2 : 2nd alarm contact output
4-20mA output
GND(-)
24V(+)
＋
－
CVVS 1.25sq-2c
3
4
5(+)
6(-)
(+)
(-)
CAUTION
・Use CVVS 1.25sq cable for the connection of detector head.
・Do not distribute power cable and signal cable together with power line for motor, etc.
・This unit applies a connector type terminal plate for easy wiring. Be care not to give a high load to
the connector.
・We can not warrant the performance of this unit if undesignated cable is used.
No used

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５．OPERATION METHOD
５－１．Preparation for start-up
●Before putting power ON……………
Before putting power ON, keep following caution items. If not, danger for electric shock or damage to
the unit will be happen.
(1) Make grounding.
(2) Check that wirings with outer units are made correctly.
(3) Check that the supply voltage is within a rating.
(4) Relay contact for outer alarm may work during adjustments. Even relay contact works, treat that
any influence will not be given to the outer.
(5) To prevent fire, check that the designated fuse is used.
５－２．Basic performance flow
In normal operation, it is used on detection mode.
Power on
Stand-by
Initial clear (approx. 25sec.)
Detection mode
Alarm test mode
SET switch (Press for about 3 sec.)
ＭＯＤＥ switch (Press for about 3 sec.)
Maintenance mode
・Span adjustment
・Change of alarm levels（ＡＬ１, ＡＬ２）
・Zero adjustment
CAUTION
Maintenance mode shall be performed by the specialized service man. Do not operate it
without permission.