PT5E-02512

HIGHLY SENSITIVE TOXIC GAS MONITOR

ＦＰ－３００
ＦＰ－３００Ｐ
ＦＰ－３０１
ＦＰ－３００Ａ

This is important manual to operate the gas monitor FP-300 / FP-300P / FP-301 / FP-300A to
keep the performance of the unit, to increase the reliability of the unit. The record of thechecking result and the treatment of this should be kept and use them for next checking, planningfor repair and improvement of the equipment. It is kindly requested to keep the safety enoughconsideration at instruction even when the work failure or accidents etc takes place by
inadvertent factors and disconnection of power and signal cables.

・Identification of each cautionary marks

DANGER
This mark means that it may occur serious damage on the human’s life or products
if the unit is used in improper way.

WARNING
This mark means that it may occur serious damage on human’s body or products
if the unit is used in improper way.

CAUTION
This mark means that it may occur some damage on the body or products if theunit is used in improper way.

＊NOTE
This mark means the advice on the operation/control of the unit.

1

TABLE OF CONTENTS
1. PRODUCT OUTLINE
1-1 SUMMERY ··················································· 4
1-2 CAUTION ITEMS ············································· 5
2. PRODUCT FUNCTION
2-1 ACCESSORY LIST ············································ 7
2-2 BLOCK DIAGRAM ············································· 7
2-3 DRAWING ··················································· 8
2-4 EACH NAME DESIGNATION ····································· 9
2-4-1 FRONT PANEL ············································ 9
2-4-2 REAR PANEL ············································· 9
2-4-3 OPERATION PANEL ········································ 10
3. OPERATION
3-1 HANDLING ·················································· 11
3-2 PIPING ···················································· 12
3-3 WIRING ···················································· 13
3-3-1 CAUTION ITEMS ·········································· 13
3-3-2 TERMINAL DRAWING ······································· 13
3-4 GAS DETECTION CASSETTE TAPE ······························· 14
3-4-1 HANDLING OF GAS DETECTION CASSETTE ····················· 14
3-4-2 STORAGE FOR GAS DETECTION TAPE CASSETTE ················ 16
3-4-3 RETURN OF GAS DETECTION TAPE ··························· 16
4. OPERATION METHOD
4-1 PREPARATION ··············································· 17
4-1-1 CHECK ITEM ············································· 17
4-1-2 POWER INPUT ············································ 17
4-1-3 POWER ON ··············································· 18
4-1-4 LOADING OF DETECTION CASSETTE TAPE ····················· 18
4-1-5 FLOW ADJUSTMENT ········································ 18
4-2 OPERATION ················································· 19
4-3 SIMPLE CHECK FOR GAS ALARM PRESET POINT ··················· 19
5. EACH FUNCTION
5-1 LCD DISPLAY ··············································· 20
5-1-1 DISPLAY FORMAT ········································· 20
5-1-2 GAS CONCENTRATION DISPLAY ······························ 20
5-2 ALARM FUNCTION ············································ 21
5-2-1 GAS ALARM ·············································· 21
5-2-2 ALARM PERFORMANCE ······································ 222

5-3 EXTERNAL OUTPUT ··········································· 23
5-3-1 ALARM OUTPUT ··········································· 23
5-3-2 4-20mA OUTPUT ·········································· 25
5-3-3 OUTPUT PERFORMANCE ····································· 25
6. MAINTENANCE CHECK
6-1 DAILY CHECK ··············································· 26
6-2 REGULAR MAINTENANCE CHECK ································· 26
6-3 FLOW ADJUSTMENT OF SAMPLE GAS ····························· 26
6-4 REPLACEMENT OF CASSETTE TAPE ······························ 27
6-5 ALARM TEST ················································ 28
6-6 LCD CONTRAST ADJUSTMENT ··································· 28
6-7 RECOMMENDED SPARE PARTS LIST ······························ 29
7. TROUBLE CASE TREATMENT
7-1 SELF-DIAGNOSIS ············································ 30
7-2 TROUBLE CAUSE AND MEASURES ································ 31
8. STOPPING THE OPERATION ······································ 32
9. LIST OF PRODUCT SPECIFICATIONS ······························ 33
10. DETECTION PRINCIPLE ········································ 38

31. PRODUCT OUTLINE
1-1 SUMMERY
A good deal of specialty gases such as Phosphine(PH 3 ),Silane(SiH 4 ) andso on are used in semiconductor fabrication process.
These toxic gases are very danger to human body once they leak from such
facilities.
The gas detection instrument to monitor trace amount of gas leakage fromgas cylinder stock yard and manufacturing process shall be reliable one
and has to keep long stability.
This unit is the most recommendable gas monitor to comply with theserequirements.
The major functions of this unit are as follows.
・Two alarms-“WARNING”and“ALARM”-are provided.
・Easy to replace the gas detection cassette tape.
・The unit maintains required performance only replacing the cassettetape every one month.
・When the gas detection tape is exposed with gas that is sampled by thepump, depending on the gas concentration, the gas detection tape makes
the color.
And the unit detects the ratio of color changed and converts it to thegas concentration.
・Almost interference-free detection for alcohol, hydrogen, etc becauseof its detection principle.
・ There are three types of specifications for this monitor.
FP-300/FP-300P/FP-301/FP-300A
Desk top type
FP-300/FP-300P/FP-301/FP-300A(CE/UKCA marking spec.) Desk top type（CE/UKCA marking spec.）
FP-300/FP-300P/FP-301/FP-300A (TYPE P)
Panel mounting type

Method of confirmation for CE/UKCA marking type
The CE/UKCA marking is labeled on the detector in case of comply with CE/UKCA mark.
Please confirm the instrument specification before using.
Please refer Declaration of Conformity that is at the end of this manual if you
have CE/UKCA marking type.
You can confirm instrument specification to see the CE/UKCA mark as follows.

CE/UKCA mark4

1-2 CAUTION ITEMSWARNING
Abnormal temperature, smoke, noise, smell
During the operation, if any unusual thing is caused, stop the operation immediately,
and turn the power off. If the unit is operated continuously with this condition, it
may cause the electrical shock or fire.

CAUTION
Contact with the metal edge
When move the unit, and it may be needed to touch the edge of the metal case or plastic
parts, take care enough not to be injured by the edge of metal of plastic.

WARNING
Shock & damage by the drop
Do not drop or give the impact to the unit. This unit includes very sensible parts,
so it may make the unit not to detect the gas leakage correctly.

WARNING
Use at the high temperature, high humidity or dusty place
・Do not use or store the unit at the place where may be high temperature, high humidity
or dusty. It may cause the unusual operation of the unit or it may be source of thefire or electric shock. Use the unit within operating temperature and humidity
specified in the specifications sheet.
・When the unit is moved from high temperature area to low temperature area, it may
get the water condensation inside of the unit. If the unit is operated with thiscondition, the correct gas detection may not be performed. And it may be source ofthe malfunction. When the unit is moved, use the unit after keeping the unit in thesame condition for several hours to be accustomed with the condition.

CAUTION
Operation at the unstable place
Do not install the unit at the bent position or there is vibration.
During the operation, the unit may drop, and it may injure the human or broken.

WARNING
Connection of Earth(grounding)
To avoid electric shock, connect the earth wiring to the earth terminal.
If not, it may make the electric shock.

WARNING
Treatment of power cable
Do not put any material on the power cable, or do not stretch the cable or bent.
It may cause the fire or damage of the cable.

5

WARNING
Power source
Before power on, check that the power source voltage is within the given voltage.
If not, it may damage the unit or source of the fire/electric shock.

WARNING
Multi-wiring
To the same power input, if many power plugs are connected, it may cause the fire,
and it may cause the power shut down due to over loading.
And it may make the unit to be affected by the electrical noise.

WARNING
Mixing in of a foreign articles to the inside of the unit
Do not mix metallic articles or foreign articles which are easy to burned the insideof the unit.
It may cause the bad performance, electric shock or fire.

WARNINGPut the articles on the unit
Do not put the container including water such as flower vase, potted plant etc, and small
metallic articles such as pin, clip etc onto the unit.
If they are entered into the unit and used as it is, it is caused to the breakage ofthe unit, electric shock or fire.

CAUTIONUse of gas detection tape
・Store the gas detection tape in the bag in the refrigerator. Do not cut the bag during
the storage. If the bag is cut, it expedite the change of the color of the tape andit can not be used any more. And use the gas detection tape within the storage period
specified.
・If the gas detection tape is stored beyond the specified storage period, we can notassure the accuracy of the gas detection. To be safety, do not use the gas detection
tape which is stored beyond specified storage period.
・The gas detection tape is painted with special material, do not touch with the fingers.
It does not cause any influence on the human body, but it may cause the low accuracyof the gas detection or tape cut.
・The replacement period of the gas detection tape is one month at no gas condition.
When the unit detect the gas, the gas detection tape must be replaced before one month.
・The gas detection tape is designed for this unit only, so do not use this gas detection
for other unit. It may be source of the trouble.
・Depending on the kinds of the tape or storage condition, the gas detection tape may
get the color slightly, but it does not affect on the gas detection.

6

2．PRODUCT FUNCTION
2－1 ACCESSORY LIST
This unit is accessory with the following and then check them when received.
・ Cassette tape・ Dust filter
・ Instruction manual・ Fuse(Desk top type only)：1 pce：1 pce：1 pce：2 pcs

2－2 BLOCK DIAGRAM
Piping diagram
Pump

Flow meterＰ
Gas IN

Head unit

FilterＦ
Flowsensor
Detection
tape
Solenoidvalve

Gas OUTElectric block DWGHead unit
Light emit
Photo sensor
Amp unit

Amp unit

Ｉ／Ｏ unit
Status signals
Low flow sensor
Deck sensor
Others

Ａ／Ｄ converter

ＣＰＵ unit

ＬＣＤ unit

Ｄ／Ａ converter

4-20mA output

Control signal

Solenoid valve, Motor etc

Alarm output

WARNING, ALARM, TROUBLE

7

2－3 DRAWINGSpace needed

Desk top typeSpace needed

Space needed

Space needed

Panel mount type (TYPE-P)

Space needed

Space needed82－4 EACH NAME DESIGNATION
2－4－1 FRONT PANEL
Desk top type

Panel mount type (TYPE-P)
(3)

(4)

(1)

(2)
(1)POWER switch(2)Operation panel(3)Cassette tray(4)Flow monitor

：
：
：
：

Power ON/OFF
Operate each and display. See【2-4-3 OPERATION PANEL】
Set the gas detection tape.
Check the flow rate of sample gas.

2－4－2 REAR PANEL
Panel mount type (TYPE-P)

Desk top type
(5)

(9)
(10)

(8)
(5)External terminal(6)Gas IN half union(7)Gas OUT half union(8)Fuse(9)Partial exhaust port
(10)Earth terminal

：
：
：
：
：
：

(7)

(6)

See【3-3-2 TERMINAL DRAWING】
Connect the PTFE tube φ6mm O.D
Connect the PTFE tube φ6mm O.D
2A * 2 pcs
φ1/2 inch O.D pipe
Connect the earth wiring92－4－3 OPERATION PANEL
(12)

(13)

(15)

(18)

(19)

(11)

(14)

(21)

(11)POWER/TROUBLE lamp(12)ALARM lamp（Alarm）(13)WARNING lamp（Warning）(14)Buzzer(15)MODE switch(16)△（UP）switch(17)▽（DOWN）switch(18)BZ STOP switch(19)LAMP RESET switch(20)EJECT switch(21)LCD

(16)

(17)

(20)

： Normal（Gas status）… Green light on
Trouble ……………… Green lamp blinking： Red lamp
Light out at gas detection.
When trigger alarm, it blinks or lights on.
： Orange lamp
Light out at gas detection.
When trigger alarm, it blinks or lights on.
： Alarm ………… Continuous tone ( Pi )Warning ……… Intermittent tone ( Pi,Pi, )Switch on …… Single tone ( Pi )： When press approx 3 sec at gas detection, it gets
maintenance mode and can make alarm test etc.
： ・When press this switch at gas detection, the flow
will go up.
・When this switch is pressed, mode can be selected.
： ・When press this switch at gas detection, the flow
will go down.
・When press this switch at maintenance status,
the mode can be selected.
： When press BZ STOP switch at gas detection status, thebuzzer stops sounding and alarm lamps(12)，(13) shall bechanged from blinking to light on.
： ・After press BZ STOP switch(18)at gas alarm status,press LAMP RESET switch at gas alarm. When it gets lower
than alarm preset level, the alarm lamp(12)，(13)will
light out, the external alarm will be cancelled.
・When it gets to plural trouble status, the trouble
can be checked in turn by pressing this switch.
See【7-1 SELF-DIAGNOSIS】
・When pressed at gas detection status, the alarm set value
shall be displayed on LCD(21)for approx 2 sec.
： When unload the cassette tape, press and hold this switch forapprox 2 sec and then, the cassette tray will open.
： This shall show various comment such as gas reading.

10

３．OPERATION
3－1 HANDLING①

For panel mount type, there is no handle. Then carry it with hands on to the bottom.

CAUTION
Do not lift nor transport the in this unit by use of cassette tray. There are risks of breakage
of cassette tray, breakage of the instrument or injury when the instrument is dropped.
②

When install this unit, take caution to install where alarm can be checked easily,
the reading is easy to see, the cassette tape is easy to replace, flow can easily be
adjusted and it is easy to maintain.

WARNING
Do not put the container including water such as flower vase, potted plant etc, and small metallic
articles such as pin, clip etc onto this unit.
If they are entered into this unit and used as it is, it is caused to the breakage of this unit,
electric shock or fire.
③

Do not install the following places where it will be cause for trouble and accident.
・Place where sun-drought is given.
・Place where to be plenty of dust and full of humidity.
・Place where direct wind is given.
・Place where to be many of vibration.
・Place where to be on unstable stool or slant.
・Place where to be outdoor or plenty of water drops.

WARNING・Do not use or store in high temperature, high humidity and dusty places. It is caused to theabnormal action, electrical shock or fire.
・When this unit is moved the place from low temperature to high temperature, the surface or
inner part will be condensed.
If it is used under suck condition, correct detection cannot be performed.
Also it is caused to the trouble.
When this unit is moved, leave it for few hours at the place of use to equilibrate withenvironment temperature.

CAUTION
Do not put this unit on unstable places such as slope, narrow space or vibrated places.
It is afraid that this unit may drop or face during operation which caused to injury or breakageof this unit.

11

④

As this unit is composed of precision electronics parts, do not drop and crush andinstall where it is safe and horizontal.

WARNING
Do not give a shock such as fall and hit to this unit.
Since this unit applies precise electronics parts, normal operation or correct gas detection
cannot be performed.

⑤

Keep it from the noise source where to be near from high capacity transducer, highnoise of motor power source and high voltage generator.

⑥

To prevent the error of operation by electric radio interference, keep it at over 1maway from the walky-talky and hand-phone or mobile.

3－2 PIPING①②③④

The piping between both IN/OUT should be within MAX 20ｍ.
The piping material should be used with a PTFE tube ofφ6㎜ O.D.
For OUT side pipe, discharge to the given exhaust duct.
For GAS IN side, mount it by the accessory filter.

CAUTION
・The length of piping depends on the kind of adsorptive gas.
・Contact our nearest agent or Riken Keiki for adsorptive gases and length of piping.

123－3 WIRING
3－3－1 CAUTION ITEMS①②

The signal wire of current output should be used in the condition not to beaffected by the noise through the shielded cable (CVVS cable etc).
Wiring work should be used by switching OFF（０ side）If it should be done underpower charge condition, it may damage the unit by short circuit etc.

3－3－2 TERMINAL DRAWING① AC220V(L)／DC24V(＋)② AC220V(N)／GND (－)
③ GND

⑨
⑩
⑪
⑫
⑬
⑭
⑮
⑯
⑰

COM
ａ
ｂ
COM
ａ
ｂ
COM
ａ
ｂ

Current output

WARNING contact⑧⑦⑥⑤④③②①

4-20mA（＋）
4-20mA（－）
No useNo useNo use⑰⑯⑮⑭⑬⑫⑪⑩⑨

④
⑤
⑥
⑦
⑧

Power input

ALARM contact

Trouble contact

・Power input
Desk top type ： AC100V-240V±10%・50/60Hz
Panel mount type： DC24V±10%（Check the polarity）
・Power output：4-20mA（Take care of polarity）
Output 0～F.S at linearity0：
4.0 mAF.S.
： 20.0 mA
Trouble：0.5 mA
Initial：
2.5 mAFor gas exceeding F.S, it indicates up to the output of 22mA.

The rating of alarm point each is 125V，0.5A. It may have the case to need theprotection spares such as spark killer by the connection load to keep the function.

13

３－４ GAS DETECTION CASSETTE TAPE
This gas detection cassette tape（FC TYPE）is for exclusive cassette tape.
Use it by understanding all the below.

３－４－１ HANDLING OF GAS DETECTION CASSETTE
CAUTION
Do not touch with detection tape.
Special reagent is applied for detection tape and then, though it is not harmful tohuman, do not touch by hand. Because it may cause drop of detectability and the cut-out
of tape.

WARNING
Do not use the detection cassette tape after passing its expiry date.
The operation time of cassette tape is one month and then, the tape passing over 1 monthafter opening cannot warrant the indication accuracy from the safety.

＊NOTE
When start to use the detection cassette tape, specify the start of operation date.
To grasp the replacement date of the detection tape, be sure to put the date ofoperation on the cassette tape.
Entry place
Put in the operation date.

CAUTION
Use the designated model for the detection cassette tape.
The cassette tape is different from the measuring gas, check the model of it firstand use it.
If the different model of cassette tape is used, it is impossible to detect the gas.
Then, the cassette tape model name is displayed on LCD while the cassette loading tray
is open.

14

CAUTION
Check the contents in display every day and be sure to replace the cassette tape.
・The replacement frequency of cassette tape is 31 days under the condition thatsample gas is free.
If the sample gas is detected and the tape will go on faster.
Then this replacement frequency is shorter.
Then, the tape will be consumed if unloading on the way or turn on the power ON/OFF.
Use the new cassette tape as long as it can and then, use it up to the end.
・When repeatedly unload the cassette tape on the way, the accuracy of tape reminder
accuracy will be in accurate.
・When the reminder date display shows 2 days, the message〔CHANGE TAPE〕will be shown.
POWER/TROUBLE lamp will flicker and the replacement of cassette tape will be blinking
and expedite the replacement of the cassette tape.
If the cassette tape is empty completely, it will show〔TAPE END〕and as the gas
detection is stopped to operate and replace the tape immediately.
・When load the cassette tape on the unit, see [6-4 REPLACEMENT OF CASSETTE TAPE] whenreplace.

CAUTION
Do not load cassette tape to the other unit than our specified gas monitor.
The gas detection cassette tape is for exclusive use (FC type) of unit.
Do not load it to the other unit and not use it by turning back the tape.

CAUTION
Do not give the force to the detection tape.
When turn the tape winding part by hand, do not give the force more than the required
or strain the tape strongly. Do not wind the winding part basically.

CAUTION
Some detection tape may change its color slightly when the storage bag is opened, dependingon the storage condition.
However, it does not affect to the gas sensitivity.

15

３－４－２ STORAGE FOR GAS DETECTION TAPE CASSETTE
CAUTION
Preserve the cassette tape in refrigerator without opening a bag.
Do not put it into freezer.
The detection tape is so delicate.
If do not handle with care, the capability of tape will be lost and then, the accurate
detection will not be available.
After having understood the following, store the detection tape.

CAUTION
Do not store the cassette tape which has been opened once.
For the cassette tape which once opened, put it back into the pack and store it in the
refrigerator. When one month has passed, do not use it because the given function ofthat tape may not maintain the original function due to the deterioration.

CAUTIONUse up the cassette tape within the storage period.
・・The gas detection tape must be used up in the storage period printed in the pack.
If the detection tape has passed the storage period, it will be deteriorated andcannot maintain the original function.
If stored after opening the pack and leave it with loading the cassette tape in theunit, the discolor of tape may take place and the original function of tape could
not be maintained. Then, after opening, use it up at earliest.

３－４－３ RETURN OF GAS DETECTION TAPE
Please return the used tape with case to us.

16

We dispose it properly at our end.

4．OPERATION METHOD
4－1 PREPARATION
4－1－1 CHECK ITEM
・Pipe
・Wire

：

Check whether the given items are not wrong(Pipe material, length)See【3-2 PIPING】： Check whether the connection with external output is correct or not.
See【3-3 WIRING】

4－1－2 POWER INPUT
After having understood the below, turn on the power.
・Check that the power switch is OFF side（０ side）.
・Check that the power source is adjusted with the power displayed on the unit.

WARNING
Do not supply the power source other than the specified voltage.
The unit will be broken and it may cause of electrical shock or fire.

WARNING
Make grounding the earth wire to prevent an electrical shock.
Otherwise, you may have an electrical shock.
Use the “E” terminal located at the rear of this unit.
・Use the power source by keeping it away from the high consumption of motor and highpower source.
・Do not make multi-wire connection.
・Arrange not to damage the power cord. Do not bend the power cord or hook or pullout forcibly.

17

4－1－3 POWER ON
Change over the power switch from OFF ( O side) to ON side ( I side).
After power on, this comes to the detection condition.

＊NOTE
The unit reels out the tape after power on.
The life span of the tape will be shortened if the power ON/OFF is repeated rashly in tape loaded
condition.

＊NOTE
If there are high concentration gases with detection tape loaded, it may give an alarm even
if it is before detection condition.
However, this is not a correct gas concentration because it is before detection condition.

4－1－4 LOADING OF DETECTION CASSETTE TAPE
Put in the detection cassette tape suited for the model to the detection gas.
Check the detection tape and tape model.
In detail, see【6-4 REPLACEMENT OF CASSETTE TAPE】. After loading it,(after closing the cassette tray), it will be in detection condition in a minute.

＊NOTE
The tape is always fed once after loading the cassette tape.
The life span of the tape will be shortened if the tape loading/unloading is repeated rashly.

＊NOTE
If there are high concentration gases with detection tape loaded, it may give an alarm even
if it is before detection condition.
However, this is not a correct gas concentration because it is before detection condition.

4－1－5 FLOW ADJUSTMENT
Check the sample gas flow rate. If the flow meter ball is out of range,see【6-3 FLOW ADJUSTMENT OF SAMPLE GAS】and adjust it.

18

4－2 OPERATION
When make the power switch ON（ I side ）, it will proceed to the detection condition
after displaying the necessary information and mechanical check.

Power switch：ON↓
POWER/TROUBLE lamp： Light on

MODEL FP-300

・・・ In case of FP-300

VER． 00000

・・・Display the version of program↓
PH3

500ppb・・・Gas and full scale are
Displayed

L:150

H：300

・・・Alarm preset point

・When tape is not loaded, failure
message ：〔 TAPE SET MISS 〕 isdisplayed.
Load the tape to【6-4 REPLACEMENT OF CASSETTE TAPE】

Paper feeding for gas detection

STAND BY

・・・Standby condition

TAPE CHECK・・・Detection tape checking↓(1)Gas name(2)Gas display(3)Tape remainder

(1)

(2)

PH3：

0ppb

・・・Measuring condition

TAPE VALID 30 D
(3)

4－3 SIMPLE CHECK FOR GAS ALARM PRESET POINT
When press “LAMP RESET” switch of the front panel on the measuring condition, the alarm point
shall be displayed as follows.
However, the normal measuring condition means the condition in which gas alarm and trouble
alarm do not trigger.
PH3

:

0ppb

L: 150

H: 30019

・Ｌ：ＷＡＲＮＩＮＧ
・Ｈ：ＡＬＡＲＭ

５．EACH FUNCTION
5－1 LCD DISPLAY
5－1－1 DISPLAY FORMATLCD The display is formatted by the following.

□□□□□
①
ＴＡＰＥ

：

□□□□
②

ＶＡＬＩＤ

ppm

□□ Ｄ
③

① Gas name is displayed as follows. …………… Example）PH３② Gas density is displayed.……………………… Displayed by ppm，ppb unit
③ Display the remainder of detection tape.

5－1－2 GAS CONCENTRATION DISPLAY
The display of this gas concentration has the following feature.
・ For gas concentration, the figure at each detection cycle is updated at each cycle.
・ For gas concentration, it will be the average within the time of detection cycle.
・ For gas display, the detection figure at previous detection cycle is outputted.
The following drawing is the timing chart at the case of change with elapsed time.
Cycle

Gas concentration

Ｆ．Ｓ．
2／3Ｆ．Ｓ．
1／3Ｆ．Ｓ
0

Concentration
conversion

Ｆ．Ｓ．
2／3Ｆ．Ｓ．
1／3Ｆ．Ｓ0

Gas concentration
20

Elapsed time

5－2 ALARM FUNCTION
5－2－1 GAS ALARM
This unit is designed to detect the level of discolor by being exposed to the detection
tape containing the special reagent within a unit of time. Namely, if a unit of time(detection cycle) has not passed, the accurate gas detection is not available.
On the other hand, when high concentration gas is generated, it is required to trigger
alarm at the earliest.
The alarm activation of this unit is based on the following figure, the rapid
measurements are available.

＊NOTE
The external output ４－２０ｍＡ is given later than the operation of alarm contact,because the gas concentration is displayed after every measuring cycle.

n
o
i
s
r
e
v
n
o
c
n
o
i
t
a
r
t
n
e
c
n
o
c

r
o
l
o
c
s
i
D
n
o
i
s
r
e
v
n
o
c
n
o
i
t
a
r
t
n
e
c
n
o
c

WARNING

F.S.

→

ALARM

r
o
l
o
c
s
i
D

F.S.

Tape discolor

Cycle

→

Tape discolor

Cycle

ALARM
WARNING

Meas time

Meas time

Meas time

Meas time

WARNING
Triggers

WARNING
Reading

Triggers

ALARM
Triggers

21

Reading

5－2－2．ALARM PERFORMANCE
Timing chart

NormalAlarm point

Non-latched

Alarm

ALARM

Alarm pointWARNINGGas
Latched mode(std)
Alarm lamp

Buzzer Stop
B.S.

Lamp reset
L.R.

B.S

(1st)

Alarm contact(1st)
Alarm lamp

(2nd)

Alarm contact(2nd)BuzzerAlarm lamp

(1st)

Alarm contact(1st)
Alarm lamp

(2nd)

Alarm contact(2nd)BuzzerB.S
Alarm lamp

(1st)

Alarm contact(1st)
Alarm lamp

(2nd)

Alarm contact(2nd)BuzzerB.S.
Alarm lamp

(1st)

Alarm contact(1st)
Alarm lamp

(2nd)

Alarm contact(2nd)BuzzerNon-latched mode(Option)
Alarm lamp
(1st)

B.S

B.S

Alarm contact(1st)
Alarm lamp

(2nd)

Alarm contact(2nd)Buzzer

22

L.R.

5－3. EXTERNAL OUTPUT
5－3－1 ALARM OUTPUT
This output will be non-latched mode after pushing the reset switch.
WARNING Contact： Dry “C” contact， Rating : AC 125V, 0.5A (Resistive load)
ALARM
Contact： Dry “C” contact， Rating : AC 125V, 0.5A (Resistive load)
TROUBLE alarm Contact： Dry “C” contact， Rating : AC 125V, 0.5A (Resistive load)
The connection to terminal proceeds as follows.
“a” contact（N.O）caseabCOM“b” contact（N.C）case

a
b
COM

Alarm contact is used as signal transmission media to activate the buzzer alarm rotation
light. Do not use it for control purpose such as shutting off etc.

CAUTION
Normally-close contact (Break contact) at de-energized condition may change to open contact
in a moment due to physical shock.
Whenever alarm contact is used with normally-close contact, please put delayed-circuit(for about one second) to receiver side of normally-close contact to avoid such phenomenon.

When control the external load, it may have the case to give the evil influence tothe gas detector by load characteristic. In such case, let it make the performancestable and to protect the contact, it is requested to proceed to the following
procedure.
・ Mount and use CR circuit (Spark killer :SK) suited for relay coli by relaying via
low voltage relay.
In case of DC case, use it by mounting diode etc to the relay.
・ Mount CR circuit to the load side of relayed relay on request.

23

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

SK

Alarm contact

C
O
I
L

SK

Ｖ

Ｖ

Power supply
FP-300L
O
R
D

Relayed relay

Power supply(Low voltage relay)－How to think alarm contacts against inductive 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 work.
・High voltage is put inside of detector 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.
To prevent the above difficulties in advance, it is required to have following preventions.
・The inductive load shall not be used in principle (Do not use fluorescent lamp, motor,etc.).
・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, the contact shall be always protected withappropriate surge killer.
In this case, contact rating shall be below 50% of resistive load.
Below 0.25A at 100VAC
Below 0.75A at 30VDC* As the inductive load, there are following samples.
・Revolving light * External relay * Buzzer * Siren

24* Fan * Fluorescent lamp *Motor etc.

5－3－2 4-20mA OUTPUT
This unit is provided with 4-20mA output suited for LCD reading display.
The following is a timing chart for 4-20mA output whenever the gas concentration ischanged.

Gas concentration

Meas cycle

Ｆ．Ｓ．
２／３ＴＬＶ
１／３ＴＬＶ
0

20mA

4mA

4-20mA output

Elapsed time

5－3－3 OUTPUT PERFORMANCE
OutputResistive load：：

4-20mA output
Below 300Ω

4.0 mA ……………… Gas concentration reading 0.0ppm
20.0 mA ……………… F.S.
22.0 mA ……………… Gas concentration exceeding F.S.
0.5 mA ……………… Trouble alarm
2.5 mA ……………… Elapsed time up to gas detection from power on at initial andmaintenance time25

６．MAINTENANCE CHECK
6－1 DAILY CHECK
Proceed to the following daily check procedure to maintain the function.
① Check the remainder of cassette tape.
・ Check it by the remainder display 〔 TAPE VALID ...D 〕on the lower of front panel.
・ When the cassette tape is at prime time of replacement, replace it to follow the【6-4 REPLACEMENT OF CASSETTE TAPE】.
② Check that the sample gas flow is within the red lines.
・ When require flow adjustment, see【6-3 FLOW ADJUSTMENT OF SAMPLE GAS】for adjustment.
③ Check that there is no trouble alarm.
・ When the trouble alarm goes out, see【7-2 TROUBLE CAUSE AND MEASURES】 and makeresetting work.

6－2 REGULAR MAINTENANCE CHECK
6 months maintenance contract is recommended to use this unit for longer.

6－3 FLOW ADJUSTMENT OF SAMPLE GAS
The flow adjustment of sample gas shall proceed to the following.
①

Check that this unit is under operating condition.

＊NOTE
In case of low sample flow it will show the message〔 FAIL = FLOW 〕 but
proceed to the next.

②

Check that the red ball in the flow monitor is within the red lines.

The red ball may goes up/down from the center
between two red lines by the pipe load andcassette tape feeding. If it is within thecenter, it is no problem nor influence.
If it is deviated from the red line, it must
be adjusted in the center by turning △▽flow adjuster.

The red ball offlow monitor
shall be in thecenter position
between two redlines.

＊NOTE
The red ball does not stay between two red lines during the tape loading
since the gas is not supplied.

26

6－4 REPLACEMENT OF CASSETTE TAPE
This cassette tape replacement shall be carried out as below.
① Check that this unit is under detection condition.
② Press and hold EJECT key for about 2～3 sec on the front panel and open the cassettetape. At this time, the buzzer sounds for 4 times.

＊NOTE
・When performing other actions than detection condition, you cannot operate EJECT key.
・You cannot operate EJECT key during 〔 TAPE CHECK 〕.
③ Remove the cassette tape used up.
④ Put in the new tape not to be in wrong position by checking the tape model.
If the position is wrong, it cannot be put in. Do not force to put in.
Then, the cassette model name is displayed in the LCD while tray is open.

CAUTION
The model of detection tape is different from the measuring gas.
If the different model is used, it may be impossible to detect the gas.
Also, it may be impossible to detect the gas if the expired tape is used.
Uncertain loading may cause a tape cut.
The gas detection tape shall be loaded back of the tray firmly.
⑤ Press the SET PUSH of cassette tray to close it.
・This will return to an automatic detection condition by closing the cassette tray.
・It will take about 1 minute for self-diagnosis until the detection starts.

CAUTION
Press the cassette tray firmly until it is locked.
If the cassette tray would be opened halfway, there is a possibility to cut the tape.
⑥ Check the sample gas flow rate. If deviated, adjust it.
When required to adjust, see【6-3 FLOW ADJUSTMENT OF SAMPLE GAS】.

CAUTION
Always use the new detection tape. If the halfway tape is used, the tape will be cut (Tape end)
suddenly before tape reminder display shows“0”.
It becomes the same result if eject the cassette tray once and then, set it at once.
It counts tape reminder correctly when putting power ON/OFF in tape loaded condition.
However, the tape will be expired 38days after tape loading date if the power off condition
continued for a long period.
Then, replace the tape with new one.

27

6－5 ALARM TESTThe alarm test shall be made in the following procedure.
① Check that this is in the detection condition.
② Press and hold MODE key for about 3 sec.
・ Select Alarm test by △ key or▽ key and press BZ STOP key.
・ Display〔 ALARM TEST 〕on LCD and the reading will increase every 1 digit whilepressing △ key.
Whenever exceed the preset alarm level, it triggers alarm.
・ At this time, no output contact works. If let the external output work, press
BZ STOP key and LAMP RESET key simultaneously and start alarm test.

＊NOTE
If △ key is released or other key is pressed during the above procedures, the reading willstop or it will decrease to 0(zero).

CAUTION
Signals corresponding to the LCD reading are output while in alarm test.
When make alarm test, announce it to respective department beforehand.
Carry it out after making proper treatment (External signal output, alarm contact).
③

Release △ key.
・ The gas concentration at display will stop.
④ Press ▽ key again.
・ Reading goes down every 1 digit.
・ When the display returns to ０, it will return to the set screen automatically.
⑤ Press and hold MODE key for about 3 minutes and it will be to the detection mode.

6－6 LCD CONTRAST ADJUSTMENTLCD contrast adjustment shall be made with the following procedure.
① Check that this is under detection condition.
② Press and hold MODE key for about 3 sec.
③ Select LCD CONTRAST with △ key or ▽ key and press BZ STOP key.
LCD CONTRAST is displayed on LCD and the contrast will be thicker by pressing △ key
and thinner by pressing ▽ key.
PH3

:

0ppb

L: 150

H: 300

PH3

:

0ppb

L: 150

H: 300④ When press BZ STOP key at visible condition, the set is completed and returns to the set
screen.
⑤ Press and hold MODE key for about 3 sec and it will return to the detection condition.

28

6－7 RECOMMENDED SPARE PARTS LIST
No.

Name

Check cycle

Replacement
cycle(year)

Q’ty/set1

Pump(except diaphragm)

6 months

1～3

1

2

Diaphragm

6 months

1～2

1

3

Pump holder

1 year3～6

1

4

Solenoid valve

－－－

5～8

1

5

Head

－－－

3～4

1 set

6

Inner pipe（Rubber）

6 months

1～3

1 set

7

Inner pipe（PTFE）

6 months

3～8

1 set

8

Elbow(F2)

6 months

1～3

5

9

Elbow

6 months

1～3

1Filter holder（With Ｏ-ring）
Gear motor（Dec drive）
Gear motor（Tape winding）

1 year

3～6

1

－－－

7～9

1

－－－

7～9

1

13

Switching regulator

－－－

6～8

1

14

Main PCB

－－－

7～8

1

15

Switching PCB(LCD)

1 year

7～8

1

16

Fuse（2A）

－－－

8

2

17

Flow-monitor assy.

1 year7～8

1

18

Inner filter（Balston）

－－－

3～5

1

19

External dust filter

6 months

0.5～1

1

10
11
12

＊NOTE
・The above replacement cycle will be changed depending on operating conditions and it
does not mean the guarantee period.
・The flow-monitor assy.(Item 17) contains a low flow sensor and O-ring.
・Replacement of PCB (Printed Circuit Board) is required due to the deterioration of
capacitor.

29

７．TROUBLE CASE TREATMENT
7－1 SELF-DIAGNOSISEach diagnosis function in this unit is provided.
If trouble was found, the following message is shown and make the recovery procedure.

Self-diagnosis

LCD message

POWER/TROUBLE lamp

Alarm contact

Sensor failure

FAIL = SENSOR

Blinking

Alarm status

Low flow

FAIL = FLOW

Blinking

Alarm status

Tape damage

FAIL = TAPE

Blinking

Alarm status

Tap cassette pre-caution

CHANGE TAPE

Blinking

Normal status

Tape ending

TAPE END

Blinking

Alarm status

Tape fails

FAIL = TAPE LEVEL

Blinking

Alarm status

Tape set fails

TAPE SET MISS

Blinking

Alarm status

System trouble

FAIL = SYSTEM

Blinking

Alarm status

Motor trouble

FAIL = MOTOR

Blinking

Alarm status＊NOTE
When encounter some troubles, 〔→〕on the right of LCD will blink and when press〔LAMP RESET〕switch, another trouble content will be displayed.

30

7－2 TROUBLE CAUSE AND MEASURES
Trouble content

Sensor failure

Low flow

Main cause

Counter-measure

Sensor disconnection orconnector removal or output
deterioration.

Sensor head is replaced bymanufacturer.

Measuring path(LED・sensor)part
is extremely dirty.

Ditto

Secular drop of pump or dust filth
Adjusted by flow adjuster.
at flow path.
Loading of tape cassette is not Make sure to set the new tapesure.
cassette.

Tape breakage
When load the cassette,
it damaged the tape.

Ditto

Tape cassette change
precaution

Nearly at tape ending.

Replace it with new tapecassette.

Tape ending

Tape ends

Replace it with new cassette.

Tape failure

It is when use the discolor tapethan the regulated or the tape Replace it with new tapepassing the life and that stored cassette.
in the outside of refrigerator.

Tape set failure

System trouble
Motor trouble

Power cannot be on.

It is not to set the tape
Load the tape cassette. Load it
cassette. It may be some error of out and check the tape condition.
tape loading.
If not in error, load it again.
Re-plug in the power. If it does
System trouble of instrument
not reset, contact the
manufacturer.
Trouble of gear motor

Contact manufacturer for repair.

Power terminal is off.

Connect it to the terminal
firmly.

Fuse is disconnected. Or not
Put in the rating fuse.
connected.

No voltage is supplied.

31

Check the power voltage supply.

8. STOPPING THE OPERATION
When finish this operation, turn power switch of this unit to OFF(O) position.

CAUTION
Do not store the unit in following places. It will be cause for trouble or accident.
・Place where sun-drought is given.
・Place where to be plenty of dust and high humidity.
・Place where direct wind is given.
・Place where to be many of vibration.
・Place where to be on unstable stand or slant.
・Place where to be outdoor or water drop.

CAUTION
Do not store this unit with gas detection cassette loaded. The detection tape will be
deteriorated at the time of re-use and the correct detection cannot be obtained.

32

9. LIST OF PRODUCT SPECIFICATIONSStandard specifications【FP-300】
Detection principle
Detectable gas
Gas concentration display
Measuring range
Measurement cycle
Sampling method
Detection method
Suction flow
Alarm preset point
Power indication
Various indications
OutputAlarm accuracy

Chemical Tape Method
Toxic gas
LCD(digital)
Depend on Detectable gas
Depend on Detectable gas
Measure the value of integral within the period
Pump suction method
Approx.0.5L/min
Depend on Detectable gas
PW/TR lamp lighting(green)
Gas/Tape reminder
Gas concentration signal/Gas alarm contact/Trouble alarm contact
Less than ±20%(against alarm preset point)(under an identical condition)

Alarm-delay time
(under an identical condition)

Gas alarm typeGas alarm indication
Gas alarm action
Gas alarm contact
Trouble alarm・Self diagnosis
Trouble alarm indication
Trouble alarm action
Trouble alarm contact
Contact capacity
Transmission scheme
Specification oftransmission
Power supply*Power consumption
Continuous operation time
Piping port
Operating temperature
Operating humidity
Structure
Outer dimension
WeightColorLess than 60sec(when introducing 1.6 times thicker gas than alarmpreset point)(at a measurement cycle)(without piping delay time)Two-level alarm(H-HH)
1st：WARNING lamp blinking or lighting(orange)・Buzzer
2nd：ALARM lamp blinking or lighting(red)・Buzzer
Latched or Auto-recover
Each no-voltage contact 1C
Tape cut/Tape end notice/Tape end/Tape failure/Tape set failure
PW/TR lamp blinking(green)/content display
Auto-recover
Each no-voltage contact 1C
AC125V・0.5A(resistive load)
Analog transmission
DC4～20mA(load resistance less than 300Ω)Desk top type：AC100V～240V±10%・50/60Hz
Panel mounting type：DC24V±10%
Desk top type：Approx.16VA/MAX.30VA(At tape feed)
Panel mounting type：Approx.10W/MAX.20W(At tape feed)
Tape operation time：MAX.1month(Without gas)
Rc1/4(PP half union<for O.Dφ6-1t>is provided as standard
accessories.)
5～35℃(non-rapidly-vary)
30～80%RH(non-condensing. It may differ depending on the tape which is used.)
Desk top type or Panel mounting type(TYPE-P)
Desk top type：Approx.164(W)×198(H)×263(D)mm
Panel mounting type：Approx.164(W)×164(H)×263(D)mm
Desk top type：Approx.6.5kg
Panel mounting type：5.5kg
Munsell 5Y8.4/0.5※It will become excluded from the specification of alarm-delay time
when the measurement cycle exceeds 60sec.

*CE/UKCA marking type is Desk top type only.

33

【FP-300P】
Detection principle
Detectable gas
Gas concentration display
Measuring range
Measurement cycle
Sampling method
Detection method
Suction flow
Alarm preset point
Power indication
Various indications
OutputAlarm accuracy

Chemical Tape Method
COCL2
LCD(digital)
0～300ppb
60sec
Measure the value of integral within the period
Pump suction method
Approx.0.5L/min
50ppb(1st)/100ppb(2nd)PW/TR lamp lighting(green)
Gas/Tape reminder
Gas concentration signal/Gas alarm contact/Trouble alarm contact
Less than ±20%(against alarm preset point)(under an identical condition)

Alarm-delay time
(under an identical condition)

Gas alarm typeGas alarm indication
Gas alarm action
Gas alarm contact
Trouble alarm・Self diagnosis
Trouble alarm indication
Trouble alarm action
Trouble alarm contact
Contact capacity
Transmission scheme
Specification oftransmission
Power supply*Less than 60sec(when introducing 1.6 times thicker gas than alarmpreset point)(at a measurement cycle)(without piping delay time)Two-level alarm(H-HH)
1st：WARNING lamp blinking or lighting(orange)・Buzzer
2nd：ALARM lamp blinking or lighting(red)・Buzzer
Latched or Auto-recover
Each no-voltage contact 1C
Tape cut/Tape end notice/Tape end/Tape failure/Tape set failure
PW/TR lamp blinking(green)/content display
Auto-recover
Each no-voltage contact 1C
AC125V・0.5A(resistive load)
Analog transmission
DC4～20mA(load resistance less than 300Ω)Desk top type：AC100V～240V±10%・50/60Hz
Panel mounting type：DC24V±10%
Power consumption
Desk top type：Approx.16VA/MAX.30VA(At tape feed)
Panel mounting type：Approx.10W/MAX.20W(At tape feed)
Continuous operation time
Tape operation time：MAX.1month(Without gas)
Piping port
Rc1/4(PP half union<for O.Dφ6-1t>is provided as standard
accessories.)
Operating temperature
5～35℃(non-rapidly-vary)
Operating humidity
30～80%RH(non-condensing)
Structure
Desk top type or Panel mounting type(TYPE-P)
Outer dimension
Desk top type：Approx.164(W)×198(H)×263(D)mm
Panel mounting type：Approx.164(W)×164(H)×263(D)mm
WeightDesk top type：Approx.6.5kg
Panel mounting type：5.5kg
Color
Munsell 5Y8.4/0.5*CE/UKCA marking type is Desk top type only.

34

【FP-301P】
Detection principle
Detectable gas
Gas concentration display
Measuring range
Measurement cycle
Sampling method
Detection method
Suction flow
Alarm preset point
Power indication
Various indications
OutputAlarm accuracy

Chemical Tape Method
H2Se/AsH3
LCD(digital)
H2Se：0～200ppb
AsH3：0～15ppb
H2Se：60sec
AsH3：180sec
Measure the value of integral within the period
Pump suction method
Approx.0.5L/min
H2Se：50ppb(1st)/100ppb(2nd)AsH3：5ppb(1st)/10ppb(2nd)PW/TR lamp lighting(green)
Gas/Tape reminder
Gas concentration signal/Gas alarm contact/Trouble alarm contact
Less than ±20%(against alarm preset point)(under an identical condition)

Alarm-delay time
(under an identical condition)

Gas alarm typeGas alarm indication
Gas alarm action
Gas alarm contact
Trouble alarm・Self diagnosis
Trouble alarm indication
Trouble alarm action
Trouble alarm contact
Contact capacity
Transmission scheme
Specification oftransmission
Power supply*Power consumption
Continuous operation time
Piping port
Operating temperature
Operating humidity
Structure
Outer dimension
WeightColorLess than 60sec(when introducing 1.6 times thicker gas than alarmpreset point)(at a measurement cycle)(without piping delay time)Two-level alarm(H-HH)
1st：WARNING lamp blinking or lighting(orange)・Buzzer
2nd：ALARM lamp blinking or lighting(red)・Buzzer
Latched or Auto-recover
Each no-voltage contact 1C
Tape cut/Tape end notice/Tape end/Tape failure/Tape set failure
PW/TR lamp blinking(green)/content display
Auto-recover
Each no-voltage contact 1C
AC125V・0.5A(resistive load)
Analog transmission
DC4～20mA(load resistance less than 300Ω)Desk top type：AC100V～240V±10%・50/60Hz
Panel mounting type：DC24V±10%
Desk top type：Approx.16VA/MAX.30VA(At tape feed)
Panel mounting type：Approx.10W/MAX.20W(At tape feed)
Tape operation time：MAX.1month(Without gas)
Rc1/4(PP half union<for O.Dφ6-1t>is provided as standard
accessories.)
5～35℃(non-rapidly-vary)
30～80%RH(non-condensing. It may differ depending on the tape which is used.)
Desk top type or Panel mounting type(TYPE-P)
Desk top type：Approx.164(W)×198(H)×263(D)mm
Panel mounting type：Approx.164(W)×164(H)×263(D)mm
Desk top type：Approx.6.5kg
Panel mounting type：5.5kg
Munsell 5Y8.4/0.5※It will become excluded from the specification of alarm-delay time
when AsH3 gas*CE/UKCA marking type is Desk top type only.

35

【FP-300A】
Detection principle
Detectable gas
Gas concentration display
Measuring range
Measurement cycle
Sampling method
Detection method
Suction flow
Alarm preset point
Power indication
Various indications
OutputAlarm accuracy

Chemical Tape Method
HBr/HF
LCD(digital)
HBr：0～2ppm
HF：0～3ppm
HBr：30sec
HF：30sec
Measure the value of integral within the period
Pump suction method
Approx.1.2L/min
HBr：0.5ppm(1st)/1ppm(2nd)
HF：0.5ppm(1st)/1ppm(2nd)PW/TR lamp lighting(green)
Gas/Tape reminder
Gas concentration signal/Gas alarm contact/Trouble alarm contact
Less than ±30%(against alarm preset point)(under an identical condition)

Alarm-delay time
(under an identical condition)

Gas alarm typeGas alarm indication
Gas alarm action
Gas alarm contact
Trouble alarm・Self diagnosis
Trouble alarm indication
Trouble alarm action
Trouble alarm contact
Contact capacity
Transmission scheme
Specification oftransmission
Power supply*Less than 60sec(when introducing 1.6 times thicker gas than alarmpreset point)(at a measurement cycle)(without piping delay time)Two-level alarm(H-HH)
1st：WARNING lamp blinking or lighting(orange)・Buzzer
2nd：ALARM lamp blinking or lighting(red)・Buzzer
Latched or Auto-recover
Each no-voltage contact 1C
Tape cut/Tape end notice/Tape end/Tape failure/Tape set failure
PW/TR lamp blinking(green)/content display
Auto-recover
Each no-voltage contact 1C
AC125V・0.5A(resistive load)
Analog transmission
DC4～20mA(load resistance less than 300Ω)Desk top type：AC100V～240V±10%・50/60Hz
Panel mounting type：DC24V±10%
Power consumption
Desk top type：Approx.20VA/MAX.30VA(At tape feed)
Panel mounting type：Approx.10W/MAX.20W(At tape feed)
Continuous operation time
Tape operation time：MAX.1month(Without gas)
Piping port
Rc1/4(PP half union<for O.Dφ6-1t>is provided as standard
accessories.)
Operating temperature
5～35℃(non-rapidly-vary)
Operating humidity
30～80%RH(non-condensing. It may differ depending on the tape which is used.)
Structure
Desk top type or Panel mounting type(TYPE-P)
Outer dimension
Desk top type：Approx.164(W)×198(H)×263(D)mm
Panel mounting type：Approx.164(W)×164(H)×263(D)mm
WeightDesk top type：Approx.6.5kg
Panel mounting type：5.5kg
Color
Munsell 5Y8.4/0.5*CE/UKCA marking type is Desk top type only.

36

Standard accssirues
・Gas detection tape cassette ············· 1pce
・Dust filter ···························· 1pce
・Instruction manual······················ 1vol・Fuse (Desk top type)···················· 2pcs

37

10. DETECTION PRINCIPLE
The structure of detection part applied in this unit is shown below figure.
There is a gas chamber made of shaded container to take the target gas onto the tape,and luminous element and photo-sensor are arranged in there.
When the target gas passes through the cellulose tape impregnated with coloring agent,
it produces color by chemical reaction.
For example, when phosphine(PH3) gas contacts the tape, it generates a silver colloid
as shown below chemical equation and changes the color of the tape from white to black.
PH3 + AgCl4 → Ag + H3PH4 + 1/2Cl2
The degree of this coloring is taken as the change of light reflection amount to
the tape.
The variation ratio of intensity for this reflection amount shall be called as response
value to gas concentration.
By calculating the calibration curve beforehand, the gas concentration can be
determined from respouse value.

Gas out

Light source(LED)

Photo sensor(photo diode)
Tape

Trace of coloring

Cassette case

The line
Gas chamber
Gas in38

Cassette case1