Riken Keiki OX-500 Instruction Manual

ＰＴ２Ｅ－１１６１
OPERATING INSTRUCTION MANUAL
FOR
RIKEN INDOOR OXYGEN MONITOR
MODEL OX-500

1
Thank you for your order of Riken Oxygen Monoxide (OX) monitor, Model OX-500.
The instrument is to notify the concentration of oxygen deficiency by alarm lamp or
buzzer to prevent oxygen deficiency accident by any chance.
To operate the instrument correctly, make sure to understand the manual before
operating.
To assure safe and effective operation, the following outlines are used in this manual:
Introduction
Danger
This mark means that it may occur serious damage on the human’s life or
instruments if the instrument is used in improper way.
Warning
If the instrument is not operated following the manual, it causes a serious
damage on the human bodies or objects.
Caution
If the instrument is not operated following the manual, it causes some
damage on the human bodies or objects.
＊Note
Advice on usage

2
Important Instruction for the Safety
Danger
・Gas sensitivity adjustment should be done periodically. Please contact our sales office or service
agent for gas sensitivity adjustment.
・Make sure to install the instrument in the air. Otherwise, it cannot be measured correctly and
there is a possibility to lead Oxygen deficiency.
Danger
・The OX-500 should not be wired parallel to the wires which include power source, high hertz ,
high voltage and any other instruments’wires.
・The intersect wiring should be done when the OX-500 is to intersect with high hertz, high voltage
and wires.
・During wiring work, do not put any stresses such as to pull, tighten or twist on cable.
・Installation is necessary in the place where has much noise.
・The instrument should not be modified.
・Do not remodel the CO-500.
Caution
・Do not poke the opening of sensor or buzzer with a sharply pointed thing, which may cause failure or
breakage of the instrument. Also it may not be able to measure correctly.
・Do not pour water on the instrument, which may cause failure.
・Do not shock or vibrate strongly since it is the precision instrument.
Caution
・Install the instrument in the place where it doesn’t get wet since the instrument is not
water-proof nor for water use.
・Do not touch parts if you open it.
・Install the instrument without placing excessive power or power/signal cable.
・Do not close airway of the sensor.

3
Page
1. Name of Each Part and Function …………………………………… 5
2. Place to Install ……………………………………………………… 6
3. How to Install ……………………………………………………… 8
3-1 How to Install …………………………………………………… 8
3-1-1 When Using Attached Mounting Panel……………………… 8
3-1-2 When Not Using Attached Mounting Panel ……………… 10
3-2 Take in Power Supply Directly ……………………………… 12
3-2-1 How to Connect AC Cable ……………………………… 12
3-2-2 Cable Using ……………………………………………… 15
4. How to Use …………………………………………………………… 16
4-1 Operational Flow after Power Source is on …………………… 16
4-1-1 Self Diagnosis ………………………………………… 16
4-1-2 Initial Clear ………………………………………… 16
4-1-3 Air Adjustment Sign ……………………………………… 16
4-2 Basic Function ………………………………………… 1７
4-2-1 Indication for Concentration …………………………… 17
4-2-2 Ｇas Alarms …………………………………………… 17
4-2-3 Scale Over ……………………………………………… 17
4-2-4 Indication when Trouble Occurs…………………………… 18
5. User’s Maintenance Mode …………………………………………… 19
5-1 Air Adjustment ………………………………………… 20
5-2 Alarm Point Confirmation ………………………………… 21
5-3 Alarm Summary Confirmation ………………………………… 22
5-4 Date & Time Confirmation・Set-up …………………………… 24
5-5 Alarm Test ……………………………………………………… 28
Table of Contents

4
6. Connect Wiring ………………………………………………………… 29
7. External Output Operation …………………………………………… 29
7-1 External Output ………………………………………………… 29
7-2 4-20mA Output Chart …………………………………… 30
7-3 LED, Contact Point Output Chart …………………………… 30
8. When Instrument is Not in a Good Condition ……………………… 31
9. Specifications ……………………………………………………… 32
10. Accessories ……………………………………………………… 33
11. Warranty ………………………………………………………… 34

5
Display
Displays concentration
and message.
“RESET”Switch
“MODE”Switch
“MAINTE”Switch
Hole to pull out cable
Hole to pull out cable
Hole to pull out cable
Power source plug
Cable length: 3ｍ
Hole for mounting
plate
Hole for mounting
plate
Hole for mounting
plate
【Front Side】
Power Switch
【Back Side】
Hole to pull out cable
Select one of the four places
depend on installation place.
Alarm Lamp（Red）
Flashes when OX
concentration becomes
below AL.2.
Alarm Lamp（Orange）
Flashes when OX
concentration becomes
below AL.1.
1. Name of Each Part and Function

6
Install the instrument on the wall where 50~80cm away
from the floor.（Make sure not to install the instrument
where air blasting get directly from the air
conditioning.）
Please do not install the instrument in the following
places.
１．Get direct sunlight or at outside
2. Place to Install
２．Easy to get wet
３．Get oily smoke, smoke or steam.
4. Below 0 ℃, over 40 ℃or
temperature changes suddenly.
５.Have a lot of moisture, e.g. bathroom
６．Back of curtain, concealed place
or not to have a good ventilation
50～180cm

7
Cautions for Usage
★When the OX concentration decreases from the air
concentration of 20.9% and it becomes below 19.0％
【standard】, the alarm lamp (orange) will start to flash
and buzzer will start beeping
★When OX concentration decreases again and becomes
below 18.0％【standard】, the alarm lamp (orange, red)
will start to flash and the continuous buzzer sound will
start beeping.
1. Open the window and ventilate
the air in the room.
2. Plug in the power plug into the
outlet and turn on the power source.
3. The air adjustment should be done. Since it is not guaranteed whether the
instrument reading is appropriate against the oxygen concentration when
recovery from the power failure or after power switch is ON, make sure to
execute the air adjustment. Please refer to the “Chapter 5 5-1
Air Adjustment”.
4. The air adjustment is important to keep accuracy of the instrument and should
be done once every six moths after air ventilation is completed well.
The display
starts flashing
25 seconds
later after all
lamps are on.
Caution
Since it is dangerous once alarm start beeping, make sure to open the
window immediately for air ventilation.

8
3-1 How to Install
3-1-1 When Using Attached Mounting Panel
①Fix attached panel to wall surface with attached screws (pan head screw or
screw spike). Make sure the panel is not inclined. Basically it should be
fixed at two places. Other two screw holes can be used if it is necessary.
②Press the body of the instrument so that the projections (3 places) of the attached
panel can get into the hole to plug attached panel of the back side of bottom case
and slide body of the instrument to a lower direction with the attached panel close
to the bottom case.
3. How to Install
Fixed with screws
Use a screw if it
is necessary
Caution
Fix the panel to the wall, which is strong enough and doesn't vibrate.
Projection
＊Note
When you install, an
arrow mark, ↑should
be upper direction.
Hole for mounting
plate panel
Depending on the installation place, the power supply plug should be pulled out
along with a hole to pull out cable (trench).
【Back side of
bottom case】
Caution
Installation should be done before AC power source is connected. Otherwise, you
will get an electrical schok.

9
③Confirm whether the back of the lower part of the case is attached closely to the
attached panel.
◎Good example ×Bad example
④The air adjustment will be done when the instrument becomes measurement
mode after plugging in the AC code into the outlet and turn on the power source.
Power source switch
ON
OFF
Caution
When you install, be careful not to pinch the cable between the body of
the instrument and the attached panel.
Caution
The concentration display flashes until the air adjustment is completed.
Make sure to take the air adjustment procedure each time when you turn
on the power source switch or power failure of the instrument.

10
Loosen the screw
3-1-2 When Not Using Attached Mounting Panel
①Loosen the screw of the lower part of the front body of the instrument and open
the upper case
②Open the upper part case and take off the connector which is connected to the
bottom case.
Caution
・Open the case without breaking the wires and connector since each
case is connected by the connector.
・Make sure not to pull the connector when you pull out the wire.
Connector

11
Fix to wall
surface by screw
③Fix on two places of the bottom case with attached two screws (pan head small
screw or screw spike.) At this time, confirm whether the instrument is not inclined.
④Connect the upper and bottom cases with the connector and close the case.
At this time, confirm whether the two clicks of the case are snapped on the
bottom case (the upper and bottom case should be attached closely)
and the cable is not stick out from the case. Screw the lower part of the front
body of the instrument.
⑤Turn on the power source.
Caution
・Fix the panel to the wall, which is strong enough and doesn’t vibrate.
・When you install, be careful not to pinch the cable between the body
of the instrument and the wall.
83.5mm(matched to
switch box）
Caution
・Install the connector correctly. Otherwise, the gas cannot be
detected properly.
・When you install the connector, install 凸(convex) part at the
left side.

12
Hole to pull out cable
Cable Clamp
3-2 Take in Power Source Directly
3-2-1 How to Connect AC Cable
①Loosen screws of lower part of the front body of the instrument, and open
the upper case.
②Cut the cable clamp which prevent the AC code to pull out and take out the
AC cable from the terminal block.
③Let cable clamp through the upper part of the hole to pull out cable and fasten
the cable clamp halfway.
Caution
Installation should be done before AC power source is connected.
Otherwise, you will get an electrical shock.
＊Note
Let the cable clamp through the back of the case.

13
Cut from the base
60±mm from leading
edge
【Back of the case】
AC cable
Surface
④Fix the power source cable with the cable clamp.
３
０
＊Note
・The position to fasten the cable clamp is 60±mm from
the leading edge of the cable.
・Fix the power source cable to contact to the surface of the
installation position.
・After fixing the power source cable, cut the remaining of cable
from the base.
３
０

14
AC cable (Let the cable clamp through beneath of the hole to pull out cable)
Hole to pull out cable
Cable clamp
Cable clamp
Terminal block
Power source cable (Let the power source cable through the left side of the
cable clamp）
⑤Let the cable clamp through the hole to pull out the cable, and fix the power cable.
⑥Connect the cable terminal to the terminal block
Caution
The cable clamp, which will be used, should be 4mm in width and within
1.5mm thickness. Please refer to 3-2-2 for adjustment cable.
＊Note
・Let the cable lamp through the back of the case.
・Put the power cable beneath of the hole to pull out cable and
fix it to contact with the surface of the installation position.
・After fixing the power source cable, cut the remaining of cable
clamp from the base.
＊Note
Let the power source cable
through the left side of the
cable clamp.

15
⑦Close the case
⑧Turn the power ON
3-2-2 Cable Using
①Connectable cable:
Single wire ：0.14mm2～1.5mm2
Twisted wire ：0.14mm2～1.5mm2
Length of bare wire：6mm
Cable finished dimension is not over φ7.0mm
②Specification of terminal block
Voltage rating ：AC250V
Current rating ：13A
Torque to tighten up screw：5～8kg
Compatible driver ：Minus driver, width of leading edge : Below 3mm
Compatible stick ：Model AI series （Phoenix）
Compatible clamping tool ：CRIMPFOX UD 6（Phoenix）
Caution
・Cables, except for AC cable, should be basically wired into the wall via
switch box. In case the cable will be wired outside of the wall, fix the
cable where the unnatural power will be placed since there is no cable
through cramp.
・Do not pull the cable when you pull out the connector which connect
each case. If you do, it may cause a loose connection.
6mm
Caution
The power source code should be cramped to the case of the body
so that the terminal connecting part (terminal block) should not take
any overloading caused by pulling out the cable.

16
4-1 Operational Flow after Power Source is On
4-1-1 Self Diagnosis
Confirm the setting status of the indicator after the power source is on.
4-20mA output：17.4mA fixation
4-1-2 Initial Clear
Initial clear is the warm up time before sensor output becomes stable.
The time for the initial clear is 25 seconds including the self diagnosis time.
4-20mA output：17.4mA fixation
4-1-3 Air Adjustment Sign
When the power source is on or returning from the power failure, the instrument urges
to air adjustment by flashing the concentration display at the measuring mode.
All functions are working on. even the air adjustment sign is displayed.
Display of flashing the concentration rate will be released once the “Air Adjustment”is
completed.
※The normal alarm operation will be conducted while the air adjustment sign is on.
Green
Green
Air Adjustment Sign（Concentration display is flashes ）
Normal concentration display（Concentration display flashes）
After “Air Adjustment”
4. How to Use

17
4-2 Basic Function
4-2-1 Indication for Concentration
Gas concentration will be displayed in “Green”.
Indication range ：0.0～25.0
4-20mA output：4～20mA（Depending on gas concentration）
4-2-2 Gas Alarm
The alarm start flashing and buzzer will beep when the gas concentration rate is less
than the alarm setting rate.
The Model OX-500 has 2 decrease alarms function (L/LL).
※The standard of alarm operation is the automatic return after self maintenance reset.
The indication of the concentration will flash when alarm beeps and will be lighted
after reset.（1st time ”orange”，2nd time “red”）
The alarm lamp will flash when alarm beeps and the lights will be on after it is reset.
The lights will be off when concentration rate becomes below the alarm point. The
alarm contact point will be on when it surpasses certain alarm point and will be
released after alarm is reset.
4-20mA output：4～20mA（depending on gas concentration）
4-2-3 Scale Over
During the measurement, it will be displayed when the instrument detects the gas which
exceeds full scale.
4-20mA output：20～22mA
Green
Orange or Red
Green

18
4-2-4 Indication When Trouble Occurs
There are two kinds of troubles, i.e. memory error and breaking of wire error.
The error notice will be displayed and buzzer will beep when error occurs.
①Memory error
Turn off the power is the only way to release the memory error.
4-20mA output：0.5mA
②Breaking of Wire Error
The sounds of buzzer will be OFF by pressing “RESET”button.
The display of breaking of wire error will be released by fixing the condition of
breaking the sensor.
4-20mA output：17.4mA
Return from the sensor breaking
It takes 25 seconds to warm up the
instrument after error is corrected
caused by breaking of wire error.
Green
Breaking of：Will be happened by breaking
wire error the sensor while it is measuring.
Red（Flashing）
Memory error：Will be happened by the result of
self diagnosis when power is on.
Red（Flashing）
tennme

19
Once you press the “MODE”button continuously for 3 seconds when the “Measuring
Mode”is indicated, the LEDs turns to the “User Maintenance Mode”.
The Model OX-500 has five user’s maintenance mode: “Air Adjustment”, “Alarm Point
Confirmation”, ”Alarm Summary Confirmation”, “Date & Time Confirmation・Set-up”,
and “Alarm Test”.
The following items can be selected by pressing the “MODE”switch when the menu is
displayed.
※While the “User’s Maintenance Mode”is displayed on instrument screen and if
you don’t operate more than 1 minute, notice of completion bell will ring and it
will return to the “Measuring Mode”.
Even when the screen shows the “User Maintenance Mode”, instrument continues
to monitor gas concentration. It will return to the “Measuring Mode”once the
alarm start beeping. (Except for the “Air Adjustment”and the “Alarm Test”.)
※Once the “User Maintenance Mode”was set while gas alarm is on or the
instrument is in trouble, it cannot monitor the gas concentration for 30 seconds.
(It is for delaying the alarm beeping until the air adjustment will be done.)
Press more than
3 seconds
“Air Adjustment Menu”
“Alarm Point Confirmation Menu”
“Alarm Summary Confirmation Menu”
“Date & Time Confirmation ・
Set-up Menu”
“Alarm Test Menu”
Green
Green
Green
Green
Green
５.User’s Maintenance Mode
MODE
MODE
MODE
MODE
MODE
MODE
Measuring Mode
Measuring Mode