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.