Fuji Electric ZPA User manual

Instruction Manual
NDIR TYPE
INFRARED GAS
ANALYZER
TYPE:  ZPA
INZ-TN2ZPAa-E

i
INZ-TN2ZPA-E
Thank you very much for purchasing Fuji’s Infrared Gas Analyzer (Type: ZPA).
• Be sure to read this instruction manual carefully before performing installation, wiring,
operation, and maintenance of the analyzer. Improper handling may result in accidents or
injury.
• The specifications of this analyzer are subject to change without prior notice for further
product improvement.
• Modification of this analyzer is strictly prohibited unless a written approval is obtained
from the manufacturer. Fuji will not bear any responsibility for a trouble caused by such a
modification.
• The person who actually operates the analyzer should keep this instruction manual.
• After reading through the manual, be sure to keep it near at hand for future reference.
• This instruction manual should be delivered to the end user without exception.
Manufacturer : Fuji Electric Co., Ltd.
Type : Described in the nameplate on main frame
Date of manufacture : Described in the nameplate on main frame
Country of manufacture : Japan
© Fuji Electric Co., Ltd. 2018
Issued in March, 2018
Rev.1st edition February, 2019
PREFACE
Request
• No part or the whole of this manual may be reproduced without
written permission of Fuji.
• Description in this manual is subject to change without prior
notice for further improvement.

ii INZ-TN2ZPA-E
To operate the analyzer properly, be sure to read “Caution on Safety” carefully.
• The descriptions listed here provide important information on safety. Be sure to observe them at all
times. Those safety precautions are classified into 3 levels, “DANGER,” “CAUTION” and “PROHIBI-
TION.”
Improper handling may cause dangerous situations that may
result in death or serious injury.
Improper handling may cause dangerous situations that may
result in medium-level troubles, minor injury, or property
damage.
Items which must not be done are indicated.
Items which indicates the possibility of receiving electric shock
if it is handled incorrectly.
CAUTION ON SAFETY
Caution on installation and transport of gas analyzer
• The unit is not of explosion-proof specifications. Do not use
it in an atmosphere of explosive gases. Otherwise, serious ac-
cidents such as explosion or fire may result.
• For installation, observe the rule on it given in the instruction
manual, and select a place where the weight of analyzer can
be supported. Installation in an inadequate place may cause
turnover or falling, resulting in injury.
• Be sure to wear protective gloves when lifting the analyzer.
Lifting it with bare hands may result in injury.
• Be sure to fix the cover before transporting the analyzer.
Transportation in unstable state may result in injury.
• The gas analyzer is heavy. To transport the analyzer, please
use a hand cart or equivalent. Prevent from carrying analyzer
by hand as much as possible. Otherwise, unexpected harm to
your body or injury may result.
• Take care not to let cable chips and other foreign objects enter
the unit during installation work. Otherwise, fire, failure, or
malfunction may result.
DANGER
CAUTION
DANGER
CAUTION
PROHIBITION
CAUTION

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INZ-TN2ZPA-E
Avant toute utilisation de l’analyseur, lire attentivement le chapitre “Consignes de sécurité”.
CONSIGNES DE SÉCURITÉ

iv INZ-TN2ZPA-E
Caution on piping
Be sure to observe the following precautions while installing
piping. Improper piping may result in gas leakage.
If the leaking gas contains a toxic component, serious acci-
dents may result. If it contains combustible gases, explosion
or fire may result.
• Connect pipes correctly referring to the instruction manual.
• Discharge the exhaust gas outdoors to prevent it from remain-
ing within the sampling device or indoors.
• Relieve the exhaust gas from the analyzer to the atmospheric
pressure to prevent buildup of undesirable pressure to the ana-
lyzer. Otherwise, piping within the analyzer may be discon-
nected, resulting in gas leakage.
• Use pipes and pressure reducing valves to which no oil/grease
is attached to the piping. Otherwise, fire may result.
Caution on wiring
• Be sure to turn off the power before installing wiring. Other-
wise, electric shock may result.
• Be sure to perform protective earth ground connection. Oth-
erwise, electric shock or failure may result.
• Select a proper wiring material that satisfies the ratings of the
instrument. Otherwise, electric shock or fire may result.
• Be sure to connect a power supply of correct rating. Other-
wise, fire may result.
CAUTION
DANGER
Caution on use
• Be sure to read the instruction manual for standard gases before
handling standard gases such as calibration gas to use them prop-
erly.
• Leaving the analyzer unused for a long time or restarting it
after long-term suspension requires procedures different from
normal operation or suspension procedures. Be sure to follow
the instructions in each instruction manual. Otherwise, intended
performance may not be achieved. Also, accidents or injury
may result.
• Do not operate the analyzer for a long time with its cover left
open. Otherwise, dust, foreign matter, etc. may contaminate on
internal walls, thereby causing faults.
DANGER
CAUTION

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INZ-TN2ZPA-E

vi INZ-TN2ZPA-E
Caution on maintenance and check
• Before performing work with the cover of the analyzer kept
open for maintenance and check, be sure to purge completely
not only within the analyzer but also measuring gas lines with
nitrogen or air. Otherwise, poisoning, fire, or explosion may
result due to gas leakage.
Be sure to observe the following to perform work safely,
avoiding electric shock or injury.
• Remove the watch and other metallic objects before work.
• Do not touch the instrument with wet hands.
• If the fuse is blown, eliminate the cause and replace it with the
one of the same capacity and type. Otherwise, electric shock or
accidents may result.
• Do not use replacement parts other than those specified by the
manufacturer. Otherwise, intended performance may not be
achieved. Besides accidents or failures may result.
• Dispose replacement parts such as maintenance parts as incom-
bustibles according to the local waste disposal regulations.
DANGER
CAUTION
Others
• If the cause of any fault cannot be identified by referring to the
instruction manual, be sure to contact your dealer or Fuji’s tech-
nician in charge of adjustment. Disassembling the instrument
carelessly may result in electric shock or injury.
CAUTION
Caution on use
• Do not touch the input/output terminals with metal or finger.
Otherwise, electric shock or injury may result.
• Do not smoke or use flames near the analyzer. Otherwise, fire
may result.
• Do not allow water to enter the analyzer. Otherwise, electric
shock or internal fire may result.
PROHIBITION

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INZ-TN2ZPA-E

viii INZ-TN2ZPA-E
1. Scope of application
To use this equipment, the following conditions must be met:
• the use of the equipment incurs no risk of a serious accident even if a failure or malfunction
occurs on the equipment, and
• in case of product failure or malfunction, safety measures such as redundant design, prevention
of malfunction, fail safe system, foolproof mechanism are provided outside of the equipment.
Be sure to use this instrument under the conditions or environment mentioned in this instruction
manual. Please consult us for the use for the following applications:
Radiation-related facilities, systems related to charging or settlement, or other usages which
may have large impact on lives, bodies, property, or other rights or interests.
2. Operating conditions and environment
Refer to "Caution on safety" and Section 9, "Specifications".
3. Precautions and prohibitions
Refer to "Caution on safety"and Section 9, "Specifications".
4. Warranty
4-1. Period of warranty
(1) Warranty period for this product including accessories is one year after delivery.
(2) Warranty period for the parts repaired by our service providers is six months after the
completion of repair.
4-2. Scope of warranty
(1) If any failure or malfunction attributable to Fuji Electric occurs in the period of warranty, we
shall provide the product after repairing or replacing the faulty part for free of charge at the
place of purchase or delivery. The warranty does not apply to failure or malfunctions resulting
from:
1) inappropriate conditions, environment, handling or usage that is not instructed in a catalog,
instruction book or user's manual, or overuse of the product,
2) other devices not manufactured by Fuji Electric,
3) improper use, or an alteration or repair that is not performed by Fuji Electric,
4) inappropriate maintenance or replacement of expendable parts listed in the instruction book
or the catalog,
5) damages incurred during transportation or fall after purchase,
6) any reason that Fuji Electric is not responsible for, including a disaster or natural disaster
such as earthquake, thunder, storm and flood damage, or inevitable accidents such as
abnormal voltage.
(2) Regardless of the time period of the occurrence, Fuji Electric is not liable for the damage
caused by the factors Fuji Electric is not responsible for, opportunity loss of the purchaser
caused by malfunction of Fuji Electric product, passive damages, damage caused due to
special situations regardless of whether it was foreseeable or not, and secondary damage,
accident compensation, damage to products that were not manufactured by Fuji Electric, and
compensation towards other operations.
WARRANTY AND MAINTENANCE

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INZ-TN2ZPA-E
5. Failure diagnosis
Regardless of the time period of the occurrence, if any failure occurs, the purchaser shall perform
a primary failure diagnosis. However, at the purchaser's request, Fuji Electric or our service
providers shall provide the diagnosis service for a fee. In such a case, the purchaser shall be charged
for the service.
6. Service life
This product, excluding limited-life parts and consumable parts, is designed for a service life of
10 years under general operating conditions (with an average ambient temperature of 30°C).
The service life may be shortened depending on operating conditions and environment. To ensure
the service life, it is important to perform planned maintenance of the product including limited-life
parts and consumable parts.
7. Maintenance plan
Maintenance can be divided into "preventive maintenance" and "corrective maintenance".
Preventive maintenance can further classified into "daily inspection" and "periodic inspection".
Preventive maintenance is achieved through systematic implementation of "daily inspection" and
"periodic inspection".
Maintenance Preventive
maintenance Daily inspection
Corrective
maintenance Troubleshooting
Periodic inspection
(1) Daily inspection
Be sure to perform daily inspection prior to operation to check for any problem in daily
operation. For the specific items of daily inspection, refer to Section 7, "Maintenance".
(2) Periodic inspection
Periodic inspection is to replace limited-life parts before their service lives are over, thus
preventing failure. Recommended inspection interval is 6 months to 12 months. If you are
using the instrument under harsh environment, we recommend you to shorten the inspection
interval. For the specific items of periodic inspection, refer to Section 7, "Maintenance".
(3) Corrective maintenance
Corrective maintenance is a measure to be taken after a trouble has occurred. Refer to
Section 7 "Maintenance" and Section 8. "Error messages". If the measures mentioned in this
instruction manual do not solve the problem, please contact one of our sales offices or service
offices.

xINZ-TN2ZPA-E
8. Limited-life parts and consumable parts
This product contains the following limited-life parts and consumable parts which may affect the
service life of the product itself.
(1) Aluminum electrolytic capacitor
• Design life: 5 years under general working conditions (annual average of ambient
temperature: 30°C)
• Symptoms when a capacitor loses its capacity: deterioration of power quality, malfunction
• Factors which affect battery life: temperature. The life is shortened by half when the
temperature rises by 10°C. (Arrhenius' law)
• Replacement: Estimate the lifetime of capacitor according to your operating environment,
and have the capacitor replaced or overhauled at appropriate time, at least once in 5 years.
Do not use capacitors beyond its lifetime. Otherwise, electrolyte leakage or depletion may
cause odor, smoke, or fire. Please contact Fuji Electric or its service providers when an
overhaul is required.
(2) LCD
• Design life: approx. three years for continuous use
• Symptoms when LCD is depleted: unclear indication, back light not working
• Factors which affect battery life: temperature. The life is shortened by half when the
temperature rises by 10°C. (Arrhenius' law)
• Replacement: Estimate the lifetime of built-in battery according to your operating
environment, and replace it at appropriate time.
9. Spare parts and accessories
Refer to "Confirmation of delivered item" and/or Section 7 "Maintenance" for spare parts and
accessories.
10. Period for repair and provision of spare parts after product dis-
continuation (maintenance period)
The discontinued models (products) can be repaired for 5 years from the date of discontinuation.
Also, most spare parts used for repair are provided for five years from the date of discontinuation.
However, some electric parts may not be obtained due to their short life cycle. In this case, repair or
provision of spare parts may be difficult even in the above period.
Please contact one of our sales offices or service offices for further information.

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INZ-TN2ZPA-E
CONTENTS
PREFACE......................................................................................................................i
CAUTION ON SAFETY ............................................................................................ii
WARRANTY AND MAINTENANCE ....................................................................viii
CONTENTS ................................................................................................................xi
1. OVERVIEW.......................................................................................................... 1
2. NAME OF DELIVERED ITEMS AND EACH PARTS ......................................2
2.1 Confirmation of delivered items ............................................................................ 2
2.2 Name and description of analyzer.......................................................................... 3
3. INSTALLATION .................................................................................................. 5
3.1 Installation conditions ............................................................................................ 5
3.2 Installation.............................................................................................................. 6
3.2.1 Installation of analyzer main frame ............................................................... 6
3.3 Piping .....................................................................................................................7
3.4 Sampling .............................................................................................................. 10
3.4.1 Conditions of sampling gas.......................................................................... 10
3.4.2 Sampling gas flow........................................................................................ 10
3.4.3 Preparation of standard gas.......................................................................... 10
3.4.4 Purging of instrument inside ....................................................................... 10
3.4.5 Pressure at sampling gas outlet.................................................................... 11
3.4.6 Example configuration of gas sampling system .......................................... 11
3.5 Wiring................................................................................................................... 12
(1) Power supply...................................................................................................... 13
(2) Analog output signal .......................................................................................... 14
(3) O2sensor input ................................................................................................... 15
(4) Contact input/output (DIO)................................................................................ 16
(5) Communication.................................................................................................. 17
3.6 Timing of contact output for calibration .............................................................. 17
4. OPERATION ......................................................................................................19
4.1 Preparation for operation ..................................................................................... 19
4.2 Warm-up operation and regular operation ........................................................... 19
5. DESCRIPTION OF DISPLAY AND OPERATION PANELS...........................20
5.1 Name and description of operation panel ............................................................ 20
5.2 Overview of display and operation panels........................................................... 21
5.3 Outline of display screen...................................................................................... 22
5.4 Basic operation..................................................................................................... 25

xii INZ-TN2ZPA-E
6. SETTING AND CALIBRATION.......................................................................26
6.1 Switch of range .................................................................................................... 26
6.1.1 Setting of range switch mode....................................................................... 26
6.1.2 Manual range switch.................................................................................... 27
6.2 Calibration setting ................................................................................................ 28
6.2.1 Setting of calibration concentration............................................................. 28
6.2.2 Setting of manual zero calibration ............................................................... 30
6.2.3 Setting of calibration range.......................................................................... 32
6.2.4 Setting of auto calibration component/range ............................................... 33
6.3 Alarm setting........................................................................................................ 35
6.3.1 Setting of alarm values ................................................................................ 35
6.3.2 Hysteresis setting ......................................................................................... 37
6.3.3 Peak alarm setting........................................................................................ 38
6.4 Setting of auto calibration .................................................................................... 40
6.4.1 Auto calibration ........................................................................................... 40
6.4.2 Forced run/stop of auto calibration.............................................................. 44
6.5 Setting of auto zero calibration ........................................................................... 46
6.5.1 Auto zero calibration ................................................................................... 46
6.5.2 Forced run/stop of auto zero calibration ...................................................... 49
6.6 Parameter setting.................................................................................................. 51
6.7 Maintenance mode ............................................................................................... 57
6.8 Manual calibration procedure .............................................................................. 62
6.8.1 Manual zero calibration ............................................................................... 62
6.8.2 Manual span calibration............................................................................... 64
7. MAINTENANCE ...............................................................................................65
7.1 Daily check .......................................................................................................... 65
7.2 Daily check and maintenance procedures............................................................ 65
7.3 Long term maintenance........................................................................................ 66
7.4 Cleaning of sampling cell .................................................................................... 67
7.4.1 Disassembly and assembly of sampling cell................................................ 67
7.4.2 How to clean sampling cell.......................................................................... 73
7.5 Replacement of fuse............................................................................................. 73
7.6 Adjustment in heat treatment furnace .................................................................. 74
8. ERROR MESSAGE............................................................................................76
9. SPECIFICATIONS ............................................................................................. 79
9.1 General specifications .......................................................................................... 79
9.2 Table1 Measurable component and range........................................................... 82
9.3 Code symbols....................................................................................................... 86
9.4 Outline diagram.................................................................................................... 88

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INZ-TN2ZPA-E
1. OVERVIEW
This instrument measures the concentration of NO, SO2, CO2, CO and CH4 contained in sampling gas on
the principle that different atomic molecules have an absorption spectrum in the wave band of infrared
rays, and the intensity of absorption is determined by the Lambert-Beer law.
Since this instrument incorporates a compact O2sensor, it allows measuring up to 5 components simulta-
neously by using the built-in O2sensor (up to 4 components if O2sensor is excluded).
Furthermore, use of a microprocessor and large sized liquid crystal display realizes improvement of oper-
ability, accuracy and multi-functions.
This instrument is optimum for measuring combustible gas exhausted from boilers or incinerators, and it
is effective for steel gas analysis [blast furnace, steel converter, thermal treatment furnace, sintering (Pellet
equipment), coke furnace], storage and maturity of vegetable and fruit, biochemistry (microbe), [fermen-
tation], air pollution [incinerator, exhaust gas desulfurization, denitration], automotive emission (excluding
tester), protection against disasters [detection of explosive gas and toxic gas, combustion gas analysis of
new building material], growth of plants, chemical analysis [petroleum refinery plant, petroleum chem-
istry plant, gas generation plant], environment [landing concentration, tunnel concentration, parking lot,
building management] and various physical and chemical experiments.

2INZ-TN2ZPA-E
2. NAME OF DELIVERED ITEMS AND EACH PARTS
2.1 Confirmation of delivered items
Analyzer: 1 unit
Standard: IEC60127-2
Size: ø5 × 20mm
Rating: 250V.T.2A.L delay type
Part No.: R75796N17
Instruction manual (this catalog): 1 copy
(INZ-TN2ZPAa-E)
Fuse: 2 pcs
Analog output connector: 1
Fixing screws: 2
Power supply cord: 1
(When power inlet is specified)
Standard inlet type
External input connector: 1
(External O2analyzer and External
zirconia O2analyzer are specified)
Digital input/output connector: 3 max.
with the number of DIO
Fixing screws: 6 max.
(When digital input/output function is
specified)
RS-485 connector: 1
Fixing screws: 2
(When provided with communication
function)
25 pin D-sub connector (male)
Part No.: R77256N262
M2.6×4mm
25 pin D-sub connector (male)
Part No.: R77256N262
M2.6×4mm
9 pin D-sub connector (male)
Part No.: R77256N284
M2.6×4mm
Part No.: R77240N35
Ferrite core: 1
For power cable
(When terminal block for power supply
is specified) Part No.: R79181N14
Part No.: R77419N14
Max.
3 sets

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INZ-TN2ZPA-E
2.2 Name and description of analyzer
<Standard model>
Name
(1) Power switch Used for ON/OFF the analyzer.
(2) Display/operation
panel Liquid crystal display and keys for setting various functions.
(3) Purge gas inlet For connecting to the purge gas
tube.
(4) Sampling gas inlet For connecting to the measuring
gas tube.
(5) Sampling gas
outlet For connecting to the exhaust line.
(6) Fuse Fuse inside
(7) Power supply For connecting to the power
supply line.
(8) External input
connector For connecting to the output of externally installed O2analyzer.
(9) Communication
connector
(D-sub 9 pin female)
Connector for RS-485
communication.
(10) Analog output
connector
(D-sub 25
female )
Connector for the analog output
(11) Digital input/output
connector
(D-sub 25
female )
Connector for the digital
input/output
Description Name Description
(2) Display/operation panel
(3) Purge gas inlet
(4) Sampling gas inlet
(5) Sampling gas outlet
(10) Analog output connector (A/O) (D-sub25 pin)
(9) Communication connector (RS-485)
(8) External input connector
(6) Fuse
(7) Power inlet
(11) Digital input/output connector (DIO1 to 3) (D-sub25 pin)
7
132.5
57.2
463
415
483
(1) Power switch
(unit mm)
< Front panel >
< Rear panel >
(7) Power terminal block
Fig. 2-1

4INZ-TN2ZPA-E
<In case of UL model>
Name
(1) Power switch Used for ON/OFF the analyzer.
(2) Display/operation
panel Liquid crystal display and keys for setting various functions.
(3) Purge gas inlet For connecting to the purge gas
tube.
(4) Sampling gas inlet For connecting to the measuring
gas tube.
(5) Sampling gas
outlet For connecting to the exhaust line.
(6) Fuse Fuse inside
(7) Power inlet For connecting to the power
supply line.
(8) External input
connector For connecting to the output of externally installed O2analyzer.
(9) Communication
connector
(D-sub 9 pin female)
Connector for RS-485
communication.
(10) Analog output
connector
(D-sub 25
female )
Connector for the analog output
(11) Digital input/output
connector
(D-sub 25
female )
Connector for the digital
input/output
Description Name Description
(2) Display/operation panel
(3) Purge gas inlet
(4) Sampling gas inlet
(5) Sampling gas outlet
(10) Analog output connector (A/O) (D-sub25 pin)
(9) Communication connector (RS-485)
(8) External input connector
(6) Fuse
(7) Power inlet
(11) Digital input/output connector (DIO1 to 3) (D-sub25 pin)
7
132.5
57.2
463
415
483
(1) Power switch
(unit mm)
< Front panel >
< Rear panel >
Fig. 2-2

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INZ-TN2ZPA-E
3.1 Installation conditions
To install the analyzer for optimum performance, select a location that meets the following
conditions;
(1) This instrument is system built in type. This instrument should be used while embedded in a
panel, locker, or enclosure of steel sheet.
Keep a minimum clearance of 10 cm above the analyzer for heat dissipation. The same
clearance is required for each analyzers when you install several units on a multistage rack.
(2) Use this instrument indoors.
(3) A vibration-free place
(4) A place which is clean around the analyzer.
(5) Power supply
Rated voltage : 100V to 240V AC
Operating voltage : 85V to 264V AC
Rated frequency : 50/60 Hz
Power consumption : 100 VA max.
3. INSTALLATION
This unit is not explosion-proof type. Do not use it in a place with explosive gases to prevent
explosion, fire or other serious accidents.
• Entrust the installation, movement or re-installation to a specialist or the supplier. A poor
installation may cause accidental tipover, electric shock, fire, injury, etc.
• The gas analyzer is heavy. It should be installed with utmost care. Otherwise, it may tipover
or drop, for example, causing accident or injury.
• For lifting the gas analyzer, be sure to wear protective gloves. Bare hands may invite an
injury.
• This unit should be installed in a place which conforms to the conditions noted in the in-
struction manual. Otherwise, it may cause electric shocks, fire or malfunction of the unit.
• During installation work, care should be taken to keep the unit free from entry of cable chips
or other foreign objects. Otherwise, it may cause fire, trouble or malfunction of the unit.
DANGER
CAUTION

6INZ-TN2ZPA-E
(6) Operation conditions
Ambient temperature :
- 5° to 45°C (max. 40°C when
two optical units are used, and the
power supply is more than 200V
AC)
Ambient humidity : 90 % RH or less, no condensation
(7) Maintenance space
When analyzer is installed by itself, please make sure to
keep the space shown in the dimension of the figure for
maintenance. In case analyzer is installed as an unit, please
refer to the instruction manual of the analyzer unit.
(8) A breaker that meets IEC60947-1 and IEC60947-3 should
be included in the installation.
(9) A breaker should be installed near the analyzer where an op-
erator can access it.
(10) A label that clearly identifies the breaker should be placed
on it.
(11) The breaker rating should meet the analyzer rating max 2A
and a breaker should conform to all necessary approvals.
3.2 Installation
3.2.1 Installation of analyzer main frame
Installation methods for the analyzer main unit is shown below.
Support
External dimensions Mounting dimensions Mounting method
(Unit : mm)
Type
19-inch rack
mounting
450 or more
465
M6
“A” : 57.2 (EIA)
57.2
435
463
483
132.5
A
analyzer
(Remove
the cover)
analyzer
(installed)
unit : mm
400
500
Note) • The analyzer weight must be supported at the bottom of the casing.
• The analyzer should be installed in a place where ambient temperature is within -5 to 45°C (max.
40°C when two optical units are used, and the power supply is more than 200V AC), and tem-
perature fluctuation during using is minimum.
• Where vibration is unavoidable, protect the analyzer from vibrating.
For example, install rubber material around the case to isolate vibration from the suppot structure.

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INZ-TN2ZPA-E
Observe the following when connecting the gas tube.
Piping should be connected to the gas inlets and outlets at the rear panel of the analyzer.
Use a corrosion resistant tube of Teflon, stainless steel or polyethylene to connect the instru-
ment to a sampling system. Even if there is a danger of corrosion, refrain from using a tube
of rubber or soft vinyl. The instrument provides inaccurate indication due to gas absorption
by piping materials.
Pipe connection port is Rc1/4 female thread (or NPT1/4). Piping should be cut as short as
possible for a quick response. About 4 mm inner diameter is recommended.
Entry of dust into the instrument may result in defective operation. Use a clean piping and
coupling.
3.3 Piping
In addition to a sample/reference gas inlet and outlet, there is a purge gas inlet at the rear
panel of the analyzer.
When improper connection is carried out here, combustible gas, poisonous gas, and explosive
fumes may be accumulated into the analyzer.
Be careful of a connection place in the rear panel of piping connection.
CAUTION
En plus des entrées et sorties de gaz de référence/échantillon, il y a une entrée de gaz de purge
sur le panneau arrière de l’analyseur.
Si le gaz de purge n’est pas correctement appliqué à cette entrée, des gaz combustibles, des
gaz toxiques et des fumées explosives peuvent s’accumuler dans l’analyseur.
Notez bien la position de ce raccord en face arrière de l’analyseur.
Attention