Fuji Electric ZKG Service Manual
Instruction Manual
PARAMAGNETIC OXYGEN
ANALYZER
TYPE: ZKG
OXYGEN ANALYZER
INZ-TN2ZKG-E
PREFACE
We are grateful for your purchase of Fuji Electric’s paramagnetic oxygen analyzer (ZKG).
• First read this instruction manual carefully until an adequate understanding is acquired, and then proceed
to installation, operation and maintenance of the gas analyzer. Wrong handling may cause an accident or
injury.
• The specifications of this analyzer will be changed without prior notice for further product improvement.
•Modification of this gas analyzer is strictly prohibited unless a written approval is obtained from the
manufacturer. Fuji Electric will not bear any responsibility for a trouble caused by such a modification.
• This instruction manual shall be stored by the person who actually uses the gas analyzer.
• After reading the manual, be sure to store it at a place easier to access.
• This instruction manual should be delivered to the end user without fail.
Delivered items
Name Q’ty Remarks
Analyzer main frame 1 —
Panel mounting bracket 2
Fuse 2 250V AC 0.5A delay type
Instruction manual 1 —
Manufacturer: Fuji Electric Instrumentation Co., Ltd.
Type: Described in nameplate on main frame
Date of manufacture: Described in nameplate on main frame
Product nationality: Japan
© Fuji Electric Systems Co., Ltd. 2003
Request
• It is prohibited to transfer part or all of this manual without Fuji
Electric’s permission in written format.
• Description in this manual will be changed without prior notice for
further improvement.
INZ-TN2ZKG-E i
Issued in March, 2003
CONTENTS
PREFACE .........................................................................................................................i
Caution on safety .................................................................................................................. iii
1. GENERAL AND PRINCIPLE OF OPERATION.................................................... 1
1.1 General......................................................................................................................... 1
1.2 Principle of measurement ............................................................................................ 1
2. NAME AND EXPLANATION OF EACH PART ................................................... 3
2.1 Name and explanation of each part ............................................................................. 3
3. INSTALLATION ...................................................................................................... 4
3.1 Mounting...................................................................................................................... 4
3.1.1 Outline diagram...................................................................................................................4
3.1.2 Cautions on installation.......................................................................................................5
3.2 Piping........................................................................................................................... 5
(1) Piping method ...................................................................................................................5
(2) Piping diagram ..................................................................................................................6
(3) Conditions of sample gas ..................................................................................................7
(4) Flow rate of sample gas ....................................................................................................7
(5) Preparation of standard gases ...........................................................................................7
(6) Purging inside the instrument ...........................................................................................7
3.3 Wiring .......................................................................................................................... 8
(1) Wiring method ..................................................................................................................8
(2) Power terminal ..................................................................................................................8
4. OPERATION ............................................................................................................ 9
4.1 Operating procedure .................................................................................................... 9
4.2 Preparations for operation............................................................................................ 9
(1) Installation ........................................................................................................... 9
(2) Purging inside the instrument............................................................................ 10
(3) Turning on the power ........................................................................................ 10
(4) Warm-up............................................................................................................ 10
(5) Zero calibration ................................................................................................. 10
(6) Span calibration ................................................................................................. 10
4.3 Start of measurement ................................................................................................. 10
4.4 Stop ............................................................................................................................ 10
5. CALIBRATION ...................................................................................................... 11
5.1 Zero calibration and span calibration ........................................................................ 11
(1) Zero calibration ................................................................................................. 11
(2) Span calibration ................................................................................................. 11
ii INZ-TN2ZKG-E
6. CHECK AND MAINTENANCE ............................................................................. 12
6.1 Check ......................................................................................................................... 12
6.1.1 Check of sample gas flow rate ..........................................................................................12
6.2 Maintenance............................................................................................................... 12
6.2.1 Spare parts.........................................................................................................................12
6.2.2 Replacement of fuse..........................................................................................................13
6.2.3 Replacement of filter.........................................................................................................13
6.2.4 Coarse zero/span adjustment.............................................................................................14
(1) Coarse zero adjustment ............................................................................................14
(2) Coarse span adjustment............................................................................................14
7. TROUBLESHOOTING............................................................................................ 15
8. SPECIFICATIONS ................................................................................................... 17
INZ-TN2ZKG-E iii
CAUTION ON SAFETY
First of all, read this “Caution on safety” carefully, and then use the analyzer in the correct way.
• The cautionary descriptions listed here contain important information about safety, so they should always be observed.
Those safety precautions are ranked in 2 levels; DANGER and CAUTION.
Wrong handling may cause a dangerous situation, in which there is a risk of
DANGER
CAUTION
Caution on installation and transport of gas analyzer
death or heavy injury.
Wrong handling may invite a dangerous situation, in which there is a possibility of medium-level trouble or slight injury or only physical damage is
predictable.
DANGER
• 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.
CAUTION
• This unit should be installed in a place which conforms to the conditions noted in the instruction 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.
• For lifting the gas analyzer, be sure to wear protective gloves. Bare hands may invite an injury.
• Before transport, fix the casing so that it will not open. Otherwise, the casing may be separated and fall to cause
an injury.
iv INZ-TN2ZKG-E
Caution on piping
DANGER
• In piping, the following precautions should be observed. Wrong piping may cause gas leakage.
If the leaking gas contains a toxic component, there is a risk of serious accident being induced.
Also, if combustible gas is contained, there is a danger of explosion, fire or the like occurring.
• Connect pipes correctly referring to the instruction manual.
• Exhaust should be led outdoors so that it will not remain in the locker and installation room.
• Exhaust from the analyzer should be relieved in the atmospheric air in order that an unnecessary pressure will not
be applied to the analyzer. Otherwise, any pipe in the analyzer may be disconnected to cause gas leakage.
• For piping, use a pipe and a pressure reducing valve to which oil and grease are not adhering. If such a material
is adhering, a fire or the like accident may be caused.
Caution on wiring
CAUTION
• The unit must be earthed as specified. Otherwise, it may cause electric shocks, malfunction, etc.
•Be sure to use a power supply of correct rating. Connection of power supply of incorrect rating may cause fire.
• Wiring work must be performed with the main power set to OFF to prevent electric shocks.
•Wires should be the proper one meeting the ratings of this instrument. If using a wire which cannot endure the
ratings, a fire may occur.
Caution on use
DANGER
• When handling the standard gas such as calibration gas, read the instruction manual of the standard gas carefully
and use the gas correctly.
CAUTION
• Do not operate the instrument continuously with the door kept open. Otherwise injury may result..
•During operation, avoid opening the casing and touching the internal parts. Otherwise, you may suffer a burn or
shock hazard.
INZ-TN2ZKG-E v
Caution on maintenance and check
DANGER
• Before working with the casing open, be sure to turn off power supply, and perform air and N2 gas purging of not
only the analyzer inside, but also the sample gas line and reference gas line. In addition, carefully prevent oil and
grease from adhering to the restrictor, filter, packing, etc. Otherwise, poisoning, fire or explosion may be caused
due to gas leakage, etc.
CAUTION
• Before working, take off a wrist watch, finger ring or the like metallic accessories. And never touch the instrument with a wet hand. Otherwise, you will have a shock hazard.
• If the fuse is blown, eliminate the cause, and then replace it with the one of the same capacity and type as before.
Otherwise, shock hazard or fault may be caused.
Others
CAUTION
• If the cause of any fault cannot be determined despite reference to the instruction manual, be sure to contact your
dealer or Fuji Electric’s technician in charge of adjustment. If the instrument is disassembled carelessly, you may
have a shock hazard or injury.
• Do not use a replacement part other than specified by the instrument maker. Otherwise, adequate performance
will not be provided. Besides, an accident or fault may be caused.
•Replacement parts such as a maintenance part should be disposed of as incombustibles, or in accordance with the
local waste-disposal requirements.
vi INZ-TN2ZKG-E
1. GENERAL AND PRINCIPLE OF OPERATION
1.1 General
The magnetic force type (dumbbell type) oxygen analyzer is an instrument utilizing the magnetic property of
oxygen. By detecting the deviation of the dumbbell generated by the difference of magnetization of oxygen in
the dumbbell and the sample gas, oxygen can be measured quantitatively with linear output. Since the magnetic
susceptibility of oxygen is larger than that of other gases, almost no gases interfere with oxygen. As distinct from
pressure detection type analyzers, no standard gas is required.
1.2 Principle of measurement
All gases have positive or negative magnetic susceptibilities as shown in Table 1-1.
Among these gases, O2, NO and NO2 have high positive magnetic susceptibilities and are attracted strongly by
magnetic field, whereas the others are diamagnetic substances. NO and NO2 may be contained in combustion gas
at negligibly low concentrations.
It is therefore possible to measure O2 contents in various types of gases by utilizing its magnetic susceptibility.
Fig. 1-1 illustrates the principle to detect O2 contained in a gas.
Table 1-1 Relative magnetic susceptibilities of various gases
Kind of gas
Oxygen +100 Nitrogen
Air +21 (dry air) Chlorine
Carbon dioxide
Argon
Ammonia
Ethane
Methane
Relative magnetic
susceptibility
-
0.61 Hydrogen
-
0.58 Acetylene
-
0.58 Nitrous oxide -0.58
-
0.83 Nitrogen monoxide +43.8
-
0.37 Nitrogen dioxide +28.0
Kind of gas
Relative magnetic
susceptibility
-
-
-
-
0.42
0.13
0.12
0.38
INZ-TN2ZKG-E 1
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