Riken Keiki EC-592 Instruction Manual

ＰＴ１Ｅ－０８８１
FOR USERS
OPERATING INSTRUCTION MANUAL
FOR
INDICATION/ALARM UNIT EC-592

1
INDEX
１．PRODUCT OUTLINE
１－１． In the beginning …………………………………………… 3
１－２． Application for use ………………………………………… 3
１－３． Identification of each cautional marks ……………………… 3
２．IMPORTANT INSTRUCTION FOR THE SAFETY
２－１． Danger items………………………………………………… 4
２－２． Warning items………………………………………………… 4
２－３． Caution items………………………………………………… 5
３．PRODUCT FUNCTION
３－１． External drawing……………………………………………… 6
３－２． Appearance…………………………………………………… 6
３－３． Panel cut-out dimensions………………………………………7
３－４． Name of each part and function……………………………… 8
３－５． Block diagram………………………………………………… 9
４．HOW TO USE
４－１． Before operation……………………………………………… 10
４－２． Mounting/dismounting procedure……………………………… 10
４－３． Installation place……………………………………………… 11
４－４． Caution in the system engineering…………………………… 12
４－５． Grounding……………………………………………………… 15
４－６． Wiring………………………………………………………… 16
５．OPERATION METHOD
５－１． Start-up……………………………………………………… 17
５－２． Basic performance flow………………………………………. 17
５－３． Start-up method
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……………………………… 21
５－５． Maintenance and adjustment
５－５－１． Maintenance mode………………………………… 22
５－５－２． Confirmation of alarm level………………………… 23
５－５－３． Change of alarm level……………………………… 23
５－５－４． Confirmation of address…………………………… 24
５－５－５． Confirmation of peak hold level…………………… 24
５－５－６． Alarm test………………………………………… 25
５－６． How to finish operation……………………………………… 26
６．KIND OF ALARM AND ITS FUNCTION
６－１． Kind of alarm………………………………………………… 27
６－２． Gas alarm…………………………………………………… 27
６－２－１． Gas alarm action…………………………………… 27
６－２－２． Counter action at gas alarm………………………… 28
６－２－３． Gas alarm possibility except the case of gas detection28

2
７．MAINTENANCE CHECK
７－１． Frequency of maintenance 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． Replacement of sensor and parts……………………………… 30
７－４． Treatment when operation is stopped or its installation place is moved.
７－４－１． Stop at normal operation………………………… 30
７－４－２． Installation when move its place…………………… 30
７－５． Storage or treatment when not use for a long time…………… 30
８．SCRAP OF PRODUCT AND SENSOR
９．TREATMENT AT ABNORMAL CASE
９－１． Trouble alarm………………………………………………… 31
９－２． Counteraction at trouble alarm…………………………………31
９－３． Before it is thought to be trouble……………………………… 31
９－４． Trouble shooting……………………………………………… 31
１０．DEFINITION OF WORD
１１．LIST OF PRODUCT SPECIFICATIONS
１１－１． Specifications………………………………………………… 34
１１－２． Product composition………………………………………… 35

3
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 EC-592.
This instruction manual is just a guide book to operate indicator/alarm unit EC-592 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 a exclusive indicator/alarm unit to be used in combination with our electrochemical sensor type toxic
gas detector head.
○Toxic gas leaked into ambient air is detected with toxic gas detector head which is connected with this
indicator/alarm unit. Detection results (Gas concentrations) are displayed with 4-digit LED indicator.
○This unit outputs 4-20mADC as gas concentration signal.
○This unit provides 2 relay contacts for outer gas alarm.
１－３．Identification of each cautional 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

4
２．IMPORTANT INSTRUCTION FOR THE SAFETY
２－１．Danger items
２－２．Warning items
This is not a explosion proof unit. Do not use it at hazardous area.
DANGER
・Detector head
Do not connect other detector head than designated toxic gas detector head.
If connected, you can not detect gas. Furthermore, this unit or other connected unit may be broken.
・Power source
Before supplying the power, confirm that the power source is a designated voltage.
・Necessity of protective grounding
Do not cut inside or outside wire for earth, nor disconnect the wire from earth terminal..
In any case, the unit becomes dangerous conditions.
・Defect of protective function
Do not operate the unit if protective functions such as protective grounding or fuse are seems to be defective.
Also, before operating the unit confirm that there is no defect for protective functions.
・Fuse
Use the designated rating (current, voltage, type) fuse to prevent fire.
Replacement of fuse shall be done after put off the initial power source and put off the power switch of this unit.
Do not use other fuse than designated one, nor make short circuit for fuse holder.
・External connections
After making protective grounding firmly, connect to external control circuit or detection objective.
・Counteraction at gas alarm
When detect high concentration gas than preset alarm level, it is very dangerous.
It is required to take an appropriate measures by customer’s decision.
・Mounting/dismounting
Locking mechanism may be broken if the unit is mounted into the case with disengagement lever up
position. Make correct procedure for mounting/dismounting..
WARNING

5
２－３．Cautional items
・Do not use walky-talky 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 ejection.
・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

7
３－３．Panel cut-out dimensions
Dimensions with single case
１．Mounting for 2 steps in vertical and N lines in horizontal
２．Mounting for 1 step in vertical and N lines in horizontal
Required thickness of the panel : 1.2～3.2mm
Refer to the instruction manual for multi-unit case if installed the unit to multi-unit case.
（３６×N－３）＋０．６
０
138 +1
0
（３６×N－３）＋０．６
０
66 +0.6
0
CAUTION
Please consult us or with our agent for installation method or installation quantity to avoid
trouble caused by radiating heat.

9
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
ＥＣ－５９２

10
４．HOW TO USE
４－１．Before operation
Be sure to keep cautional items of use not only for first user but for already experienced staff.
If not keep these cautional items, the unit may be defective and correct gas detection may not be performed.
４－２．Mounting/dismounting procedures
（１）Mounting method
・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

11
４－３．Installation place
Keep away the system from direct sun drought or where the temperature of the system is
drastically changed.
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 install.
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.
System housing that grounding construction is not enough.
CAUTION

12
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 standby battery
outside.
Others
Do not contact with power involving 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

13
（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 EC-592 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 no work.
・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
Relay
(Low pressure relay)
Alarm contact
ＥＣ－５９２
CAUTION （FOR USE OF NORMALY-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.
・Patlight * External relay * Buzzer * Siren * Fan * Fluorescent lamp *Motor etc.
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.
・When control the light inductive load directly, protect the contacts by an appropriate surge
killer by all means.

15
４－５．Grounding
Make grounding with terminal .
Be sure to make grounding before putting power ON.
*The above fig shows the unit with single case. In case of multi-unit case, refer to instruction
manual for multi-unit case.
Be sure to make grounding for safety purpose and to keep stable operation of this unit.
Do not connect each wire with gas pipe. Make grounding corresponding to D-class grounding
(Grounding resistance : below 100 ohms).
WARNING
Terminal

16
４－６．Wiring
（In case of single case）
ＴＤ１
ＴＤ２
ＴＤ３
ＴＤ４
Maximum cable length : 1.25km
For multi-unit case, refer to operating instruction for multi-unit case.
CAUTION
・Use CVVS 1.25mm2 cable for connection.
・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.
①
②
③
④
①
②
③
④
③
④
⑤
⑥
DC２４Ｖ±１０％
ＣＶＶＳ １．２５ｓｑ－２ｃ
①
②
③
④
①
②
③
④
AL1 1st alarm contact output
AL2 2nd alarm contact output
TR Common trouble alarm contact
４－２０ｍＡ output
GND (-)
Earth terminal
Detector head
Note 1
Note 1: When low flow alarm signal is used individually,
disconnect short-circuit bar between terminal
No.3 and 4 of TD2 and connect signal cable for
low flow alarm.
+
-
+

17
５．OPERATION METHOD
５－１．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.) *1
Detection mode
Alarm test mode
SET switch (Press for about 3 sec.)
ＭＯＤＥ switch (Press for about 3 sec.)
Maintenance mode
・Zero adjustment
・Change of alarm levels（ＡＬ１, ＡＬ２）
・Span adjustment
CAUTION
Maintenance mode shall be performed by the specialized
service man. Do not operate it without permission.