Riken Keiki FI-800 Instruction Manual

PT3E-0271
FOR USERS
Safety Precautions
1. Read and understand the instructions in this manual before operating this instrument.
2. Keep manual accessible at all times.
3. This instrument cannot be used for any other purpose than what is specified in this
manual.
4. Follow all the instructions in this manual, an deviation will compromise the safety, quality
and performance of this instrument.
5. We accept no responsibility for an accident caused by the user not following the
instructions in this manual.
OPERATING INSTRUCTION MANUAL
FOR
OPTICAL INTERFEROMETIC GAS ANALYZER
MODEL FI-800

1
Thank you for purchasing our optical interferometic gas analyzer Model FI-800.
This is a fixed type explosion proof (ExdⅡB + H2T4) gas analyzer to measure various gas
concentrations such as 「Hydrogen in Nitrogen」, 「Propane in air」, 「Toluene in air」, etc
and gas calorie continuously. To use FI-800 correctly, correct installation, wirings and
pipings are required. Before using FI-800, confirm that the construction works have been
performed in accordance with 「Installation work manual」.
This manual is a guidebook for use of the FI-800. All persons who use this analyzer for
the first time and who has ever used the analyzer are requested to read through the
manual to understand the content before use.
This manual contains the following headings to ensure the safe and effective operation.
Means vital damage directly to the human life and body or properties due
to contact with high voltage, etc.
Means vital damage to the human body or properties unless the operation
or measures of this manual are observed.
Means minor damage to the human body or properties unless the operation
or measures of this manual are observed.
Means advice concerning handling and operation.
Introduction
！
DANGER
！
WARNING
！
CAUTION
＊
NOTE

2
１． Function of the product
１－１ Overall view and accessories ‥‥‥‥‥‥‥‥‥‥‥‥ 3
１－２ Name of display part and its functions ‥‥‥‥‥‥‥ 4
２．Operation method
２ー１ Start-up method ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 5
２－２ Reference gas calibration ‥‥‥‥‥‥‥‥‥‥‥ 6
２－３ Gas alarm action ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 6
２－４ Checking of preset alarm levels ‥‥‥‥‥‥‥‥‥‥ 7
２－５ Cautional display for sensor deterioration ‥‥‥‥‥‥‥‥ 7
２－６ Trouble indications and countermeasures ‥‥‥‥‥‥‥‥ 8
３．Operation method in maintenance mode
３－１ Maintenance mode and summery of each menu‥‥‥‥‥‥ 9
３－２ Contrast display of interferometric sensor ‥‥‥‥‥‥‥ 10
３－３ Light amount display of interferometric sensor ‥‥‥‥‥ 10
３－４ Adjustment of 4～20mA output ‥‥‥‥‥‥‥‥‥‥‥ 11
３－５ Sensitivity (Span) adjustment of the sensor ‥‥‥‥‥‥ 11
３－６ Setting of alarm levels ‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 12
３－７ Alarm test ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 13
３－８ Setting of AUTO REF CAL CYCLE (Option)‥‥‥‥‥‥ 14
３－９ Display of ROM number‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 14
３－１０ Display of specification number ‥‥‥‥‥‥‥‥‥‥ 14
３－１１ Pressure/temperature display in sensor part.‥‥‥‥‥ 14
４．Maintenance and inspection
４－１ Inspection frequency and items‥‥‥‥‥‥‥‥‥‥‥‥ 15
４－２ Replacement of fuse ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 17
４－３ Treatment for storage or long-time shutdown‥‥‥‥‥‥ 17
４－４ Recommendable spare parts list ‥‥‥‥‥‥‥‥‥‥‥ 18
５．Troubleshooting ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 19
６．Definition of word‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 20
７．Scrap of the product ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 20
８．Product Specifications
８－１ Standard specifications ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 21
８－２ Standard accessories ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 21
８－３ Detection principle ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ 22
Contents

3
1-1. Overall view and accessories
＊ Quantity to be used with packing type connector, kind of packing and inner diameter of
packing subject to customer’s application for use.
Accessory : Control key
The control key used for adjustment is made from a powerful magnet.
If it is closed to a credit card, ID card, other magnet products, this
key may damage the stored data.
１．Function of the product
△警告“強力磁石”
△WARNING:MAGNET
MODEL TC-7
RIKEN KEIKI
！
WARNING
Display part
Installation
hole 4-M8
Cable inlet
(Packing type connector)
Flame arrestor
for ventilation

4
1-2. Name of display part and functions
① MAINTENANCE/ESC switch‥‥Used for entering into the maintenance mode with the
control key. [Used to cancel the maintenance mode.]
② PW/TR light ‥ ‥ ……………… Illuminates continuously when the equipment is
working
(power light). And flickers in the case of abnormality
in the equipment.
③ AL1 light ……………………‥‥Illuminates when 1st alarm is activating.
④ AL2 light …………………‥‥ Illuminates when 2nd alarm is activating.
⑤ R.CAL light…………………‥‥ Illuminated during reference gas calibration is performed.
⑥ RER CAL./UP switch ………… Used to perform the reference gas calibration.
[Used to increase the value.]
⑦ AL/SET switch ………………… Used for confirmation of preset alarm level.
[Used for decision in the maintenance mode.]
⑧ BRIGHT light …‥‥………… Illuminates when light source amount of interferometric
sensor is displayed. Flickers when light source amount
is decreased.
⑨ CONT light ‥‥……………… Illuminate when contrast of interferometric sensor
is displayed. Flickers when contrast is decreased.
⑩ SPAN light …‥‥……………… Flickers in the span adjustment mode. Steady light
when the adjustment is over.
⑪ REF. light……………………‥‥ This is not used in standard spec.(Option)
⑫ REF. /DOWN switch‥‥……… This is not used in normal measurement.(Option)
[Used to decrease the level]
⑬ LCD ……………………………… Indicates the gas concentration and error
code.
＊ Descriptions in [ ] show actions at maintenance mode.
All switches described in the above list are operated by control key. The switch is actioned
by putting the control key onto ●mark or ▼▲mark for few seconds.
All descriptions of 「Press ○○○switch」 in this manual mean that the control key
is put onto ●mark or ▼▲mark.

5
2-1. Start-up method
Before start-up FI-800, confirm that the correct pipings and wiring works are performed.
(Refer to the separate manual 「Installation work manual」 for details.)
(1) Confirm that the power is not supplied to the unit
and remove 10 hexagonal socket headed bolts
and lid. Turn ON the power switch inside the unit.
In this case, the ＬＥＤ and ＬＣＤ do not go ON
because the power is not supplied to the unit.
(2) Install the lid and 10 hexagonal socket headed bolts.
Tighten these bolts firmly and supply power to the unit.
(3) With power ON to the unit, the “PW/TR” LED light goes ON and selfdiagnostic function
starts.
(4) After the unit becomes measurement mode without abnormality in the course of selfdiagnosis,
adjust the sample flow rate.
(5) Connect pipes for sample gas to GAS IN and reference gas to REF IN respectively.
When 3-way cock etc. is installed separately, change the cock position to supply the gas.
(See 「Installation work manual」 for piping method using 3-way cock).
(6) Adjust sample flow rates of sample gas and reference gas to 300ml±25ml/min respectively
with flowmeter installed outside.
(7) Change the position of 3-way cock etc. to supply reference gas to both GAS IN and REF IN.
(8) Sample flow rate of reference gas to GAS IN shall be adjusted to the same flow rate as to
supply the sample gas.
(9) After reading gets stable (approx. 60 sec.), press REF CAL switch for about 5 seconds to
make reference gas calibration.
(10)After completion of reference gas calibration, return the cock position to supply sample gas
to the GAS IN.
After completion of steps (1) to (10), continuous measurement is started..
２. Operation method
Power switch
When removing the front lid while the power is supplied, stop to supply measuring
gas and confirm that there is no combustible gases around the unit beforehand.
！
WARNING

6
2-2. Reference gas calibration
The reference gas calibration means the adjustment method of the reading to actual
concentration (reference gas concentration) by supplying reference/substitute gas
instead of measuring gas. Generally, the gas to show 0% by volume or 0% LEL is used
as reference gas and this is the same meaning of zero adjustment. Make reference gas
calibration from time to time.
Reference gas calibration is done with following procedures.
・Supply reference gas to both GAS IN and GAS OUT by changing the position of
3-way cock etc. which is installed outside.
・Wait until the reading gets stable and check that it shows the correct
concentration(Reference gas concentration).
・If reading is different, press ▲mark of REF CAL for about 5 seconds.
・REF CAL light flickers for about 10 seconds and then, shows reference gas
concentrations.
2-3. Gas alarm action
The FI-800 provides three alarm patterns such as 「H, HH alarm」, 「L, LL alarm」 and
「L.H. alarm」.
Each alarm action has the 1st alarm point(AL1) and the 2nd alarm point (AL2) which
are activated when below conditions are covered.
The mark X in below table means gas concentrations.
Alarm pattern 1st alarm condition 2nd alarm condition
H, HH alarm X ≧ AL1 X ≧ AL2
L, LL alarm X ≦ AL1 X ≦ AL2
L, H alarm X ≦ AL1 X ≧AL2
When measuring gas concentration levels meet with the 1st alarm condition, relay
contact for outer alarm works and AL1 light flashes.
But measuring gas concentration levels become out of the 1st alarm condition, relay
contact for 1st alarm is reset and AL1 light turns off automatically (Self-reset).
2
nd alarm provides same pattern as for 1st alarm.
Confirmation method for alarm pattern and alarm preset levels are described in chapter
「3-4 Checking of preset alarm levels」
There is a case to use the reference gas to show 100 vol.% or exception of 0%
depending on the specifications of FI-800.
Confirm relations between 「reference gas」 and 「reference gas concentration」
with 「S
p
ecifications for measurin
g
g
as」
p
re
p
ared se
p
aratel
y
.
＊
NOTE

7
2-4. Checking of preset alarm levels
Press ●mark of AL/SET switch by control key for more than 5 seconds. When the
switch is being pressed, 「Alarm pattern」, 「1st alarm level」 and 「2nd alarm level」are
indicated by turns in every 1 second on LCD (See below fig.).
When 1st alarm point is indicated, AL1 light is lighting, AL2 light is keep lighting
when 2nd alarm point is indicated.
When releasing the control key, they return to concentration display.
To change AL1 and AL2, please see 「3-6 Setting of alarm levels」 in maintenance
mode.
2-5. Cautional display for sensor deterioration
When detecting sensor deterioration during selfdiagnosis or measurement, BRIGHT
light and/or CONT light flashes to show the deterioration of the sensor.
Flashing of BRIGHT light
This is a cautional indication for the decrease of
light amount. This means the decrease of light
amount for the light source of interferometric
sensor. Recommend to replace or repair the
interfermetric sensor before interruption of
measurement.
CAUTION
！
b-contact( Break contact) at non-exiting condition may change to open
contact
in a moment due to physical shock.
Whenever alarm signals are used with b-contact(option), please put delayed
circuit( for about one second) to receiver side of b-contact to avoid such
phenomenon.
H . H H .
Alarm
p
attern
Ever
y
1 second
１ ２
Flashing
２ ５
Dis
p
la
y
of 1st alarm level
５ ０
Dis
p
la
y
of 2nd alarm level

8
Flashing CONT light
This is a cautional indication for the decrease
of contrast. This means that the interferometric
sensor is being dirty. Recommend to replace or
repair it before interruption of measurement.
2-6. Trouble indications and countermeasures
When the abnormality is detected during
selfdiagnosis or measurement, PW/TR
light flashes and relay contact for
trouble alarm works.
In this occasion, error code number is
displayed and outputs for 4-20mA is
fixed at 0.5mA.
Make necessary countermeasure if error code number is displayed.
Contents of error code and countermeasures
Error code Contents and countermeasures
E-00 This means the abnormality of the system.
Replacement/repair of main PC board is required
E-01 This means the interruption of measurement due to the
deterioration of inteferometric sensor.
Flashing of BRIGHT light means the decrease of light
amount for light source remarkably and flashing CONT
light means the decrease of contrast remarkably.
In any case, replacement/repair of interferometric
sensor is required.
E-02 This means the possibility of damage for setting data of
measuring gas or reference gas, a damage for alarm level
or sensor sensitivity data being set at maintenance
mode. Re-setting for various data or replacement/repair
of main PC board is required.
E-05 This means that the sample flow rate for sample gas or
reference gas to be supplied from GAS IN or REF IN is
zero.
It is thought that external pump, aspirator or reducing
valve is defective or pipings are blocked.
Flashing
Display at abnormality
Display of error code number
１ ２
Flashing

9
３－１ Maintenance mode and summery of each menu .
Maintenance mode of FI-800 is to make 「 Confirmation of the status for
interferometric sensor」, 「Adjustment of 4～20mA output」 「Adjustment of sensor
sensitivity」, 「Setting of alarm levels」 etc.
Pressing ●mark of MAINTENANCE switch for above 5 seconds during measurement
mode, it is entered to maintenance mode.
Pressing ●mark of MAINTENANCE switch again for above 5 seconds, it changes to
the normal measurement mode.
Once maintenance mode is entered, analog
output becomes approx. 2.5mA and REF CAL
light flashes.
Also, the menu shown at right side is
displayed on LCD display part.
You can step to each menu by pressing
UP/DOWN switch ▼/▲ and ●mark of
SET switch.
The below table shows each menu and its contents.
LCD display Contents of menu
Display of contrast for interferometric sensor
Display of light amount for interferometric sensor
Adjustment of 4～20mA output
Adjustment of sensor sensitivity (SPAN)
Setting of alarm levels.
Alarm test
Setting of CAL cycle for AUTO REF (Option)
Display of ROM number
Display of specification number
Pressure display at sensor part
Temperature display
３．Operation method in maintenance mode
Displays menu
Initial screen at maintenance
Flashing

10
３－２. Contrast display of interferometric sensor
Pressing the SET switch during is displayed,
is displayed for about 1 second.
After that, CONT and AL1 lights turns ON as shown in right
figure and contrast of interferometric sensor measured by
light source 1 is displayed.
Contrast is an index to show a condition of dirt for interferometric sensor.
If the dirt is progressed, this level decreases. CONT light flashes during measurement
when contrast becomes below 0.35 and it becomes trouble condition when contrast
becomes below 0.30.(See 2-6 Trouble indication and countermeasures).
Progress speed of the dirt for interferometric sensor or replacement interval of the
interferometric sensor can be guessed by checking the contrast level.
When ●mark of MAINTENANCE switch is pressed, it returns to .
３－3. Light amount display of interferometric sensor
When pressing SET switch while is
displayed, is displayed for about 1
second and then, both BRIGHT light and AL1 light
turn on, light amount for light source 1 is displayed
as show right figure.
Pressing▲▼switch, is displayed and then, light amount for light
source 2 is displayed.
These values are indexes to show deterioration of light source.
BRIGHT light flashes during measurement if the light amount becomes below 256 and
it becomes trouble condition when light amount decrease below 128.
Replacement interval of the interferometrice sensor can be guessed by checking this
value.
When ●mark of MAINTENANCE switch is pressed, it returns to .
０．５ ０ ８
４ ６ ２

11
H ２０．０
Ｌ ４．０
▲▼switch
３－4. Adjustment of 4～20mA output
Pressing SET switch while is
displayed, 4mA test signal is output as shown
right figure.
Pressing ▲▼switch, it changes to 20mA output.
When SET switch is pressed during 4mA or 20mA
test signal output, LCD flashes and signal level can
be adjusted with ▲▼switch.
Press SET switch to enter adjusted level.
Pressing ●mark of MAINTENANCE switch, it
returns to .
３－5. Sensitivity (Span) adjustment of the sensor.
The measurement result of the gas to be supplied from
GAS IN is displayed when SET switch is pressed during
is displayed
Pressing SET switch again, LCD flashes and SPAN LED
turns on to show that the span adjustment is ready.
Supply pre-known standard gas and adjust indication
with ▲▼switch.
Press SET switch to enter the adjusted value.
Pressing ●mark of MAINTENANCE switch, it
returns to .
＊ ＮＯＴＥ
4-20mA output is adjusted before shipment. However, zero or full scale
value may be changed slightly due to the condition of receiver side like
recorder etc.
In such case, adjust output according to this step.
Adjust sensitivity during LCD is
flashing, enter with SET switch.
２ ４．０
２ ４．０
SET
Before making sensitivity adjustment, be sure to make calibration by reference
gas (See step 2-2).
Calibration b
y
reference
g
as is done in measurement mode.
！
WARNING

12
３－6. Setting of alarm levels
Pressing SET switch during is displayed, the alarm pattern of FI-800 is
displayed.
Under this condition, the 「1st alarm level」 and 「2
nd alarm level」 are shown with
▲▼switch.
AL1 light and AL2 light turn on for 「1st alarm level」 and 「2nd alarm level」 respectively.
Pressing SET switch during 「1st alarm level」 or 「2nd alarm level」 is displayed, LCD
flashes and it is possible to change the setting with ▲▼switch.
Pressing ●mark of MAINTENANCE switch, it returns to .
２ ５
1st alarm level display
５ ０
2nd alarm display
H . H H .
Alarm pattern display
２ ５
SET switch
SET switch ５ ０
Change 1st alarm
level with ▲▼switch,
enter with SET switch.
Change 2nd alarm level
with ▲▼switch, enter
with SET switch.
▲▼Switc
▲▼Switc

13
３－7. Alarm test
It is possible to confirm alarm functions of this analyzer.
When make alarm(transmission) test, announce it to respective department
beforehand as this analyzer has an alarm contact. Carry it out after
making proper treatment (external signal output, alarm contact).
①Press SET switch during is displayed.
②Select the working of alarm contact with ▼ ▲switch and enter it with SET
switch.
(Not working) ⇔ (Working)
③When alarm test mode is started, test level(zero level) on LCD display flashes. If
alarm contact is set to , both CONT light and SPAN light flash.
④It is possible to change the test level between 0～full scale or over scale by
pressing ▲switch or ▼switch.
(4～20mA output level will be changed according to indication)
⑤The 1st alarm will activates when test level reaches to 1st alarm level.
(After passing alarm delay time, AL1 light flashes and 1st alarm contact will work
if it is set to
⑥The 2nd alarm will activates when test level reaches to 2nd alarm level.(After
passing alarm delay time, AL2 light flashes and 2nd alarm conduct will work if it is
set to .
Pressing ●mark of MAINTENANCE switch, it returns to .
CAUTION
！

14
３－8. Setting of AUTO REF CAL CYCLE(Option)
Pressing SET switch during is displayed, auto reference calibration
cycle is displayed. This is an optional function. The FI-800 which has no optional
function is set to 「 ACC.0 」.
３－9. Display of ROM number
Pressing SET switch during is displayed, program number
(our control No.) and sum level in FI-800 are shown one after the other.
This function is to confirm by field service engineer and is not important
function for user.
Pressing ●mark of MAINTENANCE switch, it returns to .
３－10. Display of specification number
Pressing SET switch during is displayed, specification number
(our control No.) of FI-800 is displayed.
This function is to confirm by field service engineer and is not important function
for user.
Pressing ●mark of MAINTENANCE switch, it returns to .
３－11. Pressure/temperature display in sensor part.
Pressing SET switch during or is displayed, gas
pressure (kPa, Absolute pressure) or temperature (℃) around sensor part is
displayed.
A C C. ０
Select ０～７
with ▲▼switch
and enter with
SET switch
SET switch A C C. ０
It is required to make exclusive piping and wiring construction to use the
function of auto reference calibration.
Be sure to set to 「ACC.0」 if this function is not used. If incorrect setting
is made, zero level goes down minus side and normal measurement cannot
be performed
！
WARNING

15
This analyzer is used to operate continuously for a long time. To keep the sufficient
performance, regular inspection is required.
４－１. Inspection frequency and items
Following four frequent inspections are required.
* Daily inspection …… By user
* Monthly inspection …… By user
* Every 6 months/12 months …… By manufacturer or authorized
service engineer
<Daily inspection>
Item Judgement
Confirmation of
“PW/TR” LED light
“PW/TR” LED light is continuously ON during normal operation.
Light OFF or flashing condition means the occurrence of trouble.
Countermeasure in accordance with “Trouble shooting.”
Confirmation
of indication
When minus indication or abnormal indication is displayed, check
the reference gas value and make “Reference gas calibration.”
Confirmation of
sample flow rate to
“GAS IN” and
“REF IN”
Check that 300±25ml/min is supplied to both “GAS IN“ and
“REF IN.” If not, adjust it to 300±25ml/min respectively.
Also check the value of other flowmeter and pressure gauge for
external pipings.
Confirmation of
“CONTRAST”LED
light and
“BRRIGHT”LED
light
These lights are turned off in normal condition.
Flashing of these lights mean that the deterioration of
interferometric sensor is progressing.
It is progressed further, the analyzer becomes in trouble and
measurement cannot be done. Replace interferometric sensor
before troubling.
４．Maintenance and inspection
－ Maintenance contract －
It is recommendable to make maintenance contract for regular
inspection, adjustments, repairing including gas calibration to
maintain stable operation and sensitivity.
Please contact with our nearest agent for details of maintenance
contract.

16
<Monthly including daily inspection>
Item Countermeasure
Confirmation of
reference gas level
Supply reference gas from GAS IN by changing the external
3-way cock position and confirm that the reference gas level is
indicated. If not, make “Reference gas calibration.”
Confirmation of
deterioration for
interferometric
sensor
Make displays of contrast and light amount for interferometric
sensor.
Guess the deterioration speed and replacement time by
comparing with past inspection data.
Confirmation of
alarm action
Confirm that alarm light turns on and alarm contact works by
making alarm test.
<Every 6 months/12 months inspection>
Item Countermeasure
Gas sensitivity
adjustment
(Calibration)
After making reference gas calibration, supply the pre-known
calibration gas from GAS IN and confirm that it shows correct
indication.
Daily inspection and monthly inspection are included in 6 months/12 months
inspections.
Following inspections are also done as occasion demands.
①Cleaning ②Replacement of parts ③Replacement of piping materials
④Confirmation of functions ⑤Others
This analyzer may measure dangerous gases such as explosive gases &
vapors continuously for a long period. To keep safety, be sure to make
「6 months/12 months inspections」
When make gas calibration or alarm test, announce it to respective
department beforehand.
！
WARNING
＊
NOTE

17
４－２. Replacement of fuse
(1) Stop the power supply to this analyzer.
(2) Remove hexagon headed bolts(10pcs.), and
open the lid. Remove fuses from fuse
holders(2 pcs) on PCB as shown right figure.
(3) Mount new fuses(2A, normal fusing).
After confirming that the power switch is ON,
mount the lid and tighten it firmly with bolts
(10 pcs.).
(4) Supply the power source and confirm that the analyzer works in normal.
４－３. Treatment for storage or long-time shutdown
(1) When FI-800 is not used for a long time, remove the measuring gas (especially
solvent gases and vapors) inside pipings by blowing the fresh air or nitrogen.
(2) Storage conditions
Temperature : -10～＋40℃
Humidity : 30～80%R.H.
Environment : Places of low temperature change.
Places where water vapor does not condense.
Fuse
When open the lid, make it after 30 seconds from powered off as electric charge
may be accumulated in capacitor inside analyzer.
！
CAUTION
When open the lid, stop to supply measuring gas beforehand.
！
CAUTION
Power switch

18
４－4. Recommendable spare parts list
No. Description Inspection
interval
Replacement
interval Q’ty/set
1 Sealing packing
(Non-gas contact part) 1 year 7～8 years 1 set
2 Sealing packing
(Gas contact part) 1 year 2～4 years 1set
3 Interferometric sensor
1 year 5～8 years 1 pce
4 Circuit board
(Display) - 5～6 years 1 pce
5 Circuit board
(MAIN) - 7～8 years 1 pce
6 Fuse(2A)
- 8 years 2 pcs
7 Flowmeter ass’y
(Including low flow sensor) 1 year 7～8 years 2 sets
＊１． The replacement interval will change depending on operating conditions and it
does not mean the guarantee period. Replacement interval may change from
inspection results.
＊２． Material of sealing packing to be used for gas contact part will change according
to the kind of measuring gas.
＊３． Replacement of printed circuit board is required due to the deterioration of
capacitors, etc.
＊４． For assembled unit and circuit board, use pre-adjusted one.
＊５． The flowmeter ass’y includes the low flow sensor.

19
This trouble shooting does not cover all causes of troubles. They are shown
main troubles simply to assist studying of causes.
Symptoms Causes Treatment
・Power is
not
supplied
・ Correct power source is
not supplied
・Supply the rated AC power source
・ Power switch inside
analyzer is not turned
ON.
・ Fuse is disconnected.
・Put the power switch inside analyzer
to ON.
・Replace the fuse with rated one.
n
dication
value is
not correct
・ Reference gas calibration
was done incorrectly.
・Supply reference gas from GAS IN
and make REF CAL after reading
gets stable.
・ Other Gas (not
measuring gas, nor
reference gas) is
contained.
・ This analyzer cannot measure the
gas correctly if other gas is
contained.
・ Water vapor is
condensated in piping
and measuring gas is
melted in condensated
water.
・Change the installation place of
this analyzer(including external
pipings) to warm indoor and avoid
to condensate water vapor inside
pipings.
・High humidity gas which will be
condensated in room temperature
level cannot be measured with
this analyzer.
・Measuring gas (especially
solvent) is condensated
(liquefied) in a line of piping.
・Change the installation place of this
analyzer(including external
pipings) to warm indoor and avoid
to condensate water vapor inside
pipings.
・High humidity gas which will be
condensated in room temperature
level cannot be measured with this
analyzer.
５．Trouble shooting