Fuji Electric ZKME User manual

- i -
INZ-TN1ZKME-E
PREFACE
We are grateful for your purchase of Fuji Flameproof Type Zirconia Oxygen Analyzer converter (ZKME).
First read this instruction manual carefully until an adequate understanding is acquired, and
then proceed to installation, operation and maintenance of the converter. Improper handling
may result in accidents or injury.
The specifications of this converter will be changed without prior notice for further product
improvement.
Modification of this converter 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.
This instruction manual shall be stored by the person who actually uses the converter.
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 fail.
Manufacturer: Fuji Electric Co., Ltd.
Type: Described in the nameplate put on the main body
Date of manufacture: Described in the nameplate put on the main body
Product nationality: Japan
Related instruction manual
Flameproof Type Zirconia Oxygen Analyzer converter (Type: ZFKE)···········INZ-TN5ZFKE-E
Notice ©Fuji Electric Co., Ltd. 2009
Issued in May, 2009
It is prohibited to transfer part or all of this manual without Fuji
Electric’s permission in written format.
Description in this manual is subject to change without prior
notice.
Rev. 1st edition April, 2011
Rev. 2nd edition May, 2014
Rev. 3rd edition Nov, 2017

- ii - INZ-TN1ZKME-E
SAFETY PRECAUTIONS
First of all, read this “SAFETY PRECAUTIONS” carefully, and then use in the correct way.
Be sure to observe the instructions shown below, because they describe important information on safety.
Those safety precautions are ranked in 3 levels, “DANGER”, “CAUTION” and “PROHIBITION”.
DANGER
If operation is incorrect, a dangerous situation may occur, resulting in
death or serious injuries.
CAUTION
If handled wrongly, a dangerous situation may occur, and medium
trouble or slight injury may be caused and only property damage may be
caused.
PROHIBITION
Items which must not be done are noted.
The items noted under “
CAUTION
” may also result in serious trouble depending on circumstances.
All the items are important and must be fully observed.
Caution on installation and transportation
DANGER
Although this is explosion-proof type, do not use it in the place where
explosive gases always exist (zone 0) 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, failure 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, failure or malfunction of the unit.
For installation, observe the rule on it given in the instruction manual
and select a place where the weight of converter can be endured.
Installation at an unsuited place may cause turnover or fall and there is
a risk of injury.
Be sure to wear gloves when handling the unit.
Bare hands may invite an injury.
Before transport, fix the door so that it will not open. Otherwise, the
door may be separated and fall to cause an injury.
Cautions on wiring
CAUTION
Be sure to turn off all the power before performing wiring. Otherwise
electric shock may result.
Be sure to perform class D grounding work.
Otherwise, 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.
Connect power source of correct rating. Connection of a power source
of incorrect rating may lead to a risk of fire.

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INZ-TN1ZKME-E
Cautions on use
DANGER
If unusual smell or sound has been produced, immediately stop the
instrument. Any discharge produced may cause a fire.
CAUTION
Leaving the converter unused for a long time or restarting it after
disuse 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, or accidents or injury may result.
Do not operate the converter for a long time with its door left open.
Otherwise, dust, foreign matter, etc. may stick on internal walls,
thereby causing failure.
PROHIBITION
Do not touch the input/output terminals with metal or finger.
Otherwise, failure, electric shock or injury may result.
Caution on maintenance and inspection
CAUTION
Before maintenance and check, be sure to turn off the main power
supply and wait until the detector is cooled adequately. Otherwise, you
may suffer a burn.
Before removing the detector from the flue for maintenance and
check, make sure the furnace is stopped. Otherwise, you may suffer a
burn.
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 electric shocks.
If the fuse is blown, eliminate the cause, and then replace it with the
one of the same capacity and type as before. Otherwise, it may cause
electric shocks or failure.
Others
CAUTION
If the cause of a failure cannot be identified by referring to the
instruction manual, be sure to contact your dealer or Fuji’s technician
in charge of adjustment. Disassembling the instrument carelessly may
result in electric shock 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 failure may be caused.
Replacement parts such as a maintenance part should be disposed of
as incombustibles.
Electrical Safety:
Overvoltage category
; II power supply input
; I relay interfaces
(IEC1010-1)
External overcurrent protective device
; 10A
Equipment interfaces are safety separated (SELV)

- iv - INZ-TN1ZKME-E
Contents
PREFACE.......................................................................................................................................................... i
SAFETY PRECAUTIONS.............................................................................................................................. ii
CHECKING OF CONTENTS OF THE PACKAGE ................................................................................. vii
STORAGE CONDITIONS ........................................................................................................................... vii
1. GENERAL ................................................................................................................................................... 1
1.1 Direct insertion type zirconia oxygen analyzer........................................................................................ 1
1.2 Description of flameproof........................................................................................................................ 1
2. OPERATING PARTS AND THEIR FUNCTIONS .................................................................................. 2
2.1 External appearance ................................................................................................................................. 2
2.1.1 Outline Drawing ................................................................................................................................ 2
2.1.2 Terminal block................................................................................................................................... 3
2.2 OPERATING PARTS AND THEIR FUNCTIONS ................................................................................. 4
2.2.1 External appearance .......................................................................................................................... 4
2.2.2 Internal constitution........................................................................................................................... 5
2.3 Description on display/operation panel.................................................................................................... 6
3. INSTALLATION ......................................................................................................................................... 7
3.1 Installation site ......................................................................................................................................... 7
3.2 How to install the converter..................................................................................................................... 8
3.2.1 Converter ........................................................................................................................................... 8
3.2.2 Selector valves and flowmeter (as specified) .................................................................................... 8
4. WIRING AND PIPING ............................................................................................................................... 9
4.1 Before wiring ........................................................................................................................................... 9
4.2 Wiring to terminals................................................................................................................................. 10
4.2.1 How to open the cover..................................................................................................................... 10
4.3 Wiring to terminals................................................................................................................................. 11
4.3.1 O2sensor input / Input method of O2sensor thermocouple ............................................................ 11
4.3.2 Cable gland and input and output lines ........................................................................................... 11
4.3.3 Allocation of the terminal block...................................................................................................... 12
4.4 Wiring and piping diagram .................................................................................................................... 13
4.5 Handling of standard gas (An article on separate order)........................................................................ 17
5. OPERATION ............................................................................................................................................. 18
5.1 Preparation for operation ....................................................................................................................... 18
5.2 Key operation flow diagram (outline).................................................................................................... 19
5.3 Initial parameter value table................................................................................................................... 23
5.3.1 Parameters related to measurement ................................................................................................. 23
5.3.2 Parameters related to calibration ..................................................................................................... 23
5.3.3 Parameters related to blowdown (displayed if the option is provided) ........................................... 24
5.3.4 Parameters related to maintenance .................................................................................................. 24
5.3.5 Other parameters ............................................................................................................................. 25
6. OPERATION START AND STOP.......................................................................................................... 27
6.1 Operation start........................................................................................................................................ 27
6.2 Operation stop........................................................................................................................................ 27
6.3 Actions during operation........................................................................................................................ 28
6.4 Check the contents of display ................................................................................................................ 29
6.4.1 Check of state information .............................................................................................................. 29
6.4.2 Checking the error information ....................................................................................................... 30

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INZ-TN1ZKME-E
6.4.3 Checking the alarm information.......................................................................................................30
6.5 Oxygen detector standard output voltage ...............................................................................................31
7. CALIBRATION..........................................................................................................................................32
7.1 Preparation..............................................................................................................................................32
7.2 Manual calibration..................................................................................................................................33
7.3 Auto calibration (option).........................................................................................................................35
7.4 Remote calibration..................................................................................................................................37
7.5 All calibration (option) ...........................................................................................................................39
8. BLOWDOWN (OPTION) .........................................................................................................................40
8.1 Preparation for blowdown ......................................................................................................................40
8.2 Manual blowdown ..................................................................................................................................40
8.3 Automatic blowdown..............................................................................................................................41
8.4 Remote blowdown ..................................................................................................................................43
9. MAINTENANCE AND CHECK ..............................................................................................................45
9.1 Checking.................................................................................................................................................45
9.2 Consumable parts....................................................................................................................................45
9.3 Spare parts ..............................................................................................................................................45
9.4 Replacement of fuse ...............................................................................................................................46
9.5 Troubleshooting ......................................................................................................................................47
10. SETTING AND OPERATING OF PARAMETER ...............................................................................49
10.1 Measured menu.....................................................................................................................................49
10.1.1 Display range setting screen...........................................................................................................49
10.1.2 Decimal point position setting screen ............................................................................................50
10.1.3 Full scale setting screen .................................................................................................................51
10.1.4 Setting screen for calculation time of maximum and minimum values appears............................52
10.2 Calibration menu ..................................................................................................................................53
10.2.1 Automatic calibration setting (option)............................................................................................53
10.2.2 Date and time for starting automatic calibration (option) ..............................................................54
10.2.3 Cycle time setting of automatic calibration (option)......................................................................55
10.2.4 Performing all calibration (option).................................................................................................56
10.2.5 Performing a manual span calibration............................................................................................57
10.2.6 Performing a manual zero calibration ............................................................................................58
10.2.7 Calibration gas setting....................................................................................................................59
10.2.8 Calibration waiting setting (option) ...............................................................................................60
10.2.9 Calibration error clear ....................................................................................................................61
10.2.10 Operation setting screen of calibration range...............................................................................62
10.3 Blowdown menu (option) .....................................................................................................................63
10.3.1 Automatic blowdown setting..........................................................................................................63
10.3.2 Date and time setting of automatic blowdown...............................................................................64
10.3.3 Automatic blowdown cycle setting ................................................................................................65
10.3.4 Procedure for setting blowdown time ............................................................................................66
10.3.5 Perfoming manual blowdown ........................................................................................................67
10.4 Maintenance menu................................................................................................................................68
10.4.1 Error log display.............................................................................................................................68
10.4.2 Clearing error logs..........................................................................................................................70
10.4.3 Alarm log display ...........................................................................................................................71
10.4.4 Clearing alarm logs ........................................................................................................................72
10.4.5 Operation log display .....................................................................................................................73
10.4.6 Clearing operation logs ..................................................................................................................75
10.4.7 Sensor check setting for calibration (option) .................................................................................76
10.4.8 Sensor recovery setting for calibration (option).............................................................................77
10.4.9 Performing a manual sensor check.................................................................................................78
10.4.10 Performing manual sensor recovery.............................................................................................79
10.4.11 Cell internal resistance display.....................................................................................................80

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10.4.12 Maintenance mode setting.......................................................................................................... 81
10.4.13 Password setting .......................................................................................................................... 82
10.4.14 PID auto tuning ........................................................................................................................... 83
10.5 Parameter menu ................................................................................................................................... 84
10.5.1 Current date and time setting......................................................................................................... 84
10.5.2 Contact input setting...................................................................................................................... 85
10.5.3 Selection of alarm contact output.................................................................................................. 86
10.5.4 High limit setting of oxygen concentration ................................................................................... 87
10.5.5 Lower limit setting of oxygen concentration................................................................................. 88
10.5.6 HH limit setting of oxygen concentration ..................................................................................... 89
10.5.7 LL limit setting of oxygen concentration ...................................................................................... 90
10.5.8 Hysteresis Setting .......................................................................................................................... 91
10.5.9 Hold treatment setting (maintenance hold) .................................................................................. 93
10.5.10 Hold value setting (maintenance hold)....................................................................................... 94
10.5.11 Setting of hold setting value (maintenance hold) ....................................................................... 95
10.5.12 Setting of measurement recovery time (maintenance hold) ....................................................... 96
10.5.13 Hold treatment setting (error hold)............................................................................................. 97
10.5.14 Hold value setting (error hold) .................................................................................................... 98
10.5.15 Setting of hold setting value (error hold) ................................................................................... 99
10.5.16 Setting of key lock..................................................................................................................... 100
10.5.17 Station number setting............................................................................................................... 101
10.5.18 Adjustment screen for analog output 0%................................................................................... 102
10.5.19 Adjustment screen for analog output 100%............................................................................... 103
10.5.20 Fuel coefficient setting (option) ................................................................................................ 104
10.6 Factory menu ..................................................................................................................................... 105
10.6.1 Password setting screen............................................................................................................... 105
11. HOW TO CHANGE THE SETTING .................................................................................................. 106
11.1 How to change the setting of converter ZKM depending on detector type........................................ 106
12. SPECIFICATIONS................................................................................................................................ 107
12.1 Specifications..................................................................................................................................... 107
12.2 Code symbols..................................................................................................................................... 109

- vii -
INZ-TN1ZKME-E
CHECKING OF CONTENTS OF THE PACKAGE
Check that all of the following are contained in the delivered package.
(1) Flameproof Type Zirconia Oxygen Analyzer converter main unit 1 unit
(2) Accessories 1 set (Refer to the table below.)
Table 1 Standard accessories
No. Item Quantity Remarks
1 Tube type fuse (250 V T 0.5 A) 2 For main unit (F1)
2 Tube type fuse (250 V T 2.5 A) 2 For heater (F2)
3 Instruction manual 1
The “Japanese,” “English” or “Chinese”
manual is attached.
(As specified)
4 Communication Manual 1
The instruction manual of “MODBUS” is
attached.
(As specified)
5 Mounting bracket 1 set
The “panel attachment bracket” and “pipe
attachment bracket” are attached.
(As specified)
6 Hexagon wrench 1
7 Equipments for calibration gas 1 set Selector valve, Flowmeter (as specified)
STORAGE CONDITIONS
Store the unit in a location that meets the following conditions:
(1) Vibration, dust, dirt, and humidity are minimal.
(2) A place not subjected to radiated heat from a heating furnace, etc.
(3) The atmosphere is non-corrosive.
(4) A place where ambient temperature and humidity are –30 to +70°C (non condensing) and 95% RH or
less.

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INZ-TN1ZKME-E
1. GENERAL
This manual describes the installation, operation, and the maintenance of the zirconia oxygen analyzer
converter. Read it carefully before using the converter. For the detector, flow guide tube and ejector used
with the converter, refer to relevant instruction manuals.
1.1 Direct insertion type zirconia oxygen analyzer
The direct insertion type zirconia oxygen analyzer consists of a direct insertion type zirconia detector (type
ZFKE) and converter (type ZKME).
The analyzer intended for the measurement of oxygen concentration in exhaust gas is used for combustion
control.
Caution
Power voltage for the converter must conform to that for the detector to be connected. Don’t use any
power voltage different from the power specifications of the detector. Otherwise it may result in damage
to the detector.
100/120V AC50/60Hz for ZFKER1
200/240V AC50/60Hz for ZFKER3
1.2 Description of flameproof
Flameproof is the unit that has passed the test conducted by the public institution as an flameproof-structured
instrument.
A test certificate and a name plate including necessary specifications for the purpose of explosion-proof are
attached to such an accepted unit.
Confirm them and use the unit according to those contents.
On the name plate for instrument of flameproof, the 17th digit of type code, either with N for China or T for
Japan, is stated.
The certification mark by public institution is also attached.

- 2 - INZ-TN1ZKME-E
2. OPERATING PARTS AND THEIR FUNCTIONS
2.1 External appearance
2.1.1 Outline Drawing
ZKME
326
286
442
402
362
68
Ground terminal M4
Cable gland
for flame proof ø9 - ø12 /
closeup plug (To order)
Mounting hole 4-ø14
Lock screw M6
17
211
52
For communication For contact In/Out For Other
186
40
For sensor signal For sensor power For output For power supply
Fuji Electric Instruments Co.,Ltd.
Fuji Electric Instrumentation Co.,Ltd.
CAUTION
POWEROFFANDKEEPOUT
WHENOPENTHIS COVER,
EXPLOSIVEATMOSPHERE
Fuji Electric systems Co.,Ltd.
Oxygen Ana
MODE ESC
ENTER
POWER
HEATER
POWER
FUSE T 0.5A
POWER
ON
OFF
FUSE T 2.5A
1
15
2 3 4 5 6 7 8 9 10 11 12 13 14
16 17 18 19 20 21 22 23 24 25 2826 27
O
2
TC1 AO FAULT BLOW ZV HEATER
TC2 DI1 DI2 DI3
DI-
ALARM
MAIN-
COM SV AC
NL
COM TENANCE
60 60
60 60 60
ZKM
Oxygen Analyzer
SPAN
ZERO
MEA RE
CALIB.
ZERO SPAN
SPAN
ZERO
MEA RE
CALIB.
ZERO SPAN
Selector valves + flowmeter (In case of 11th digit code “2” )
<Option>
Selector valves (In case of 11th digit code “1” )
126
293
114
102
6
15
30 83
20
20
20
15
30 83 65
20
20
20
Mounting hole
2-
φ
5.5
Mounting hole
2-
φ
5.5
Span gas inlet (NPT1/8)
Calibration gas outlet (NPT1/8)
Zero gas inlet
(NPT1/8)
Span gas inlet (NPT1/8)
Calibration gas outlet (NPT1/8)
Zero gas inlet
(NPT1/8)
65
65
101
114
102
6

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INZ-TN1ZKME-E
2.1.2 Terminal block
COMMUNICATION TERMINAL (TM2) /INSERTION TERMINAL
RS232C
RS485
Terminal number
TXD
TRX+
1
RXD
TRX–
2
GND
GND
3Remarks
Standard
Option
EXTERNAL TERMINAL (TM1) /M3
1
15
234567891011121314
16 17 18 19 20 21 22 23 24 25 28 26 27
++ −
+ −
−
+ −
O
2
TC1 AO
FAULT
TC2 DI1 DI2 DI3 DICOM
ALARM MAINTE
BLOW
AC
LSVCOM
AC N
or
HEATER
ZV
ZERO
GAS
SPAN
GAS
O
2
sensor
input
O
2
sensor
heater power
output
Analog
output
4-20mA DC
or 0-1V DC
Fault
contact output
250V AC/3A
30V DC/3A
Blow contact
output
250V AC/3A
30V DC/3A
O
2
sensor
thermocouple
input
Thermocouple
input type R
(not supplied)
Ground
terminal
M4
Contact input
Short circuit : on (Current 5mA)
Open : off (Voltage 5V)
Alarm
contact output
250V AC/3A
30V DC/3A
Calibrating gas
contact output
250V AC/3A
30V DC/3A Power supply
input
100 to120V AC
200 to 240V AC
Maintenance
contact output
250V AC/3A
30V DC/3A
COM
Exclusive
cable
Note 1) The heater power supply is the same
as the converter power supply.
Note 2) Be sure to connect the shield of the

cable to the ground in the main body.

- 4 - INZ-TN1ZKME-E
2.2 OPERATING PARTS AND THEIR FUNCTIONS
2.2.1 External appearance
ZKM
Oxygen Analyzer
Fuji Electric Instruments Co.,Ltd.
MODE ESC ENT
Fuji Electric Instrumentation Co.,Ltd.
CAUTION
POWER OFF AND KEEP OUT
WHEN OPEN THIS COVER,
EXPLOSIVE ATMOSPHERE
Fuji Electric systems Co.,Ltd.
Oxygen Ana
MODE ESC
ENTER
POWER
the same voltage of detector.
Power supply must be selected
HEATER
POWER
FUSE T 0.5A
POWER
ON
OFF
FUSE T 2.5A
1
15
2 3 4 5 6 7 8 9 10 11 12 13 14
16 17 18 19 20 21 22 23 24 25 2826 27
O
2
TC1 AO FAULT BLOW ZV HEATER
TC2 DI1 DI2 DI3
DI-
ALARM
MAIN-
COM SV AC
NL
COM TENANCE
(1)
(2)
(3)
(4)
Name Explanation
(1) Cover Glass cover.
(2) Display/operation panel Displays or operates the concentration values or setting values.
(3) Specification nameplate Displays the equipment identification number, specifications or the
like.
(4) Cable gland The wiring hole for the power wire and output line.

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INZ-TN1ZKME-E
2.2.2 Internal constitution
c
MODE ESC
ENTER
POWER
Oxygen Analyzer
(2) I/O Board
(1) CPU board
(6) Tube type fuse (F1)
(5) Tube type fuse (F2)
(7) Earth terminal
(4) Power switch
(3) Terminal block
Name Explanation
(1) CPU board The liquid crystal display and the memory circuit are installed.
(2) I/O Board The input / output circuit and the power circuit are installed.
(3) Terminal block Terminal block for various input / output signals.
(4) Power switch Turns ON/OFF this converter. (“-” : OFF, “” : ON)
(5) Tube type fuse (F2) Fuse for the heater. (250 V T 2.5A)
(6) Tube type fuse (F1) Fuse for the main unit. (250 V T 0.5A)
(7) Earth terminal Used as frame gland. (FG)

- 6 - INZ-TN1ZKME-E
2.3 Description on display/operation panel
Name Explanation
(1) Display unit Displays the concentration value and setting values.
(2) MODE key Used to switch measurement display and mode display.
(3) ESC key Used to return to the previous screen or exit the setting.
(4) Digit key Used to change the setting values.
(5) UP key
(6) ENTER key Used to determine the setting values.
(1) Display unit
(4) Digit key (5) UP key (6) ENTER key(3) ESC key(2) MODE key

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INZ-TN1ZKME-E
3. INSTALLATION
DANGER
Although this unit is the explosion-proof type, do not use it in the place (zone 0) where explosive
gases are always exist. Otherwise serious accidents such as explosion or fire may result.
CAUTION
For installation, observe the rule on it given in the instruction manual and select a place where the
weight of converter can be endured. Installation at an unsuited place may cause turnover or fall and
there is a risk of injury.
Before transport, fix the door so that it will not open. Otherwise, the casing may be separated and fall
to cause an injury.
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, failure or malfunction.
3.1 Installation site
Install the converter in a place that satisfies the following conditions.
(1) Space for periodic inspection and wiring work is available.
(2) Vibration, dust, dirt, and humidity are minimal.
(3) A place not subjected to radiated heat from a heating furnace, etc.
(4) The atmosphere is non-corrosive.
(5) Away from electrical devices that may cause noise trouble (such as motor and transformer), and
equipment that may cause electromagnetic or electrostatic induction trouble.
(6) A place where ambient temperature and humidity are -20 to +55°C and 95%RH or less.
Secure at least 100 mm of space between the converter and nearby wall. Also secure a space of opening the
front cover for maintenance.
Secure a cable wiring space under the case.
100
or more
100
or more 326
526 or more
Unit : mm

- 8 - INZ-TN1ZKME-E
3.2 How to install the converter
3.2.1 Converter
Unit: mm
Mounting dimensions Mounting
286
4-M12
402
FujiElectric Instruments Co.,Ltd.
Fuji Electric systems Co.,Ltd.
Panel
face
1
A
ccessories of converter
2
No. Name Quantity
1 Converter 1
2 Hexagon bolt
(M12×50) 4
Code Standard tightening torque
M12 42 N･m
3.2.2 Selector valves and flowmeter (as specified)
Unit: mm
Mounting dimensions Mounting
2-M5
102
Selector valves Selector valves
+ flowmeter
No. Name Quantity
1 Selector valves +
flowmeter 1
2 Pan head screw (M5) 2
Code Standard tightening torque
M5 3.0 N･m

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INZ-TN1ZKME-E
4. WIRING AND PIPING
CAUTION
: Wiring work must be carried out with all power supplies turned off. Otherwise electric
shock may result.
: Be sure to ground the Converter. (Class D grounding)
4.1 Before wiring
(1) Power voltage for the converter must conform to that for the detector to be connected.
(2) Power supply wiring
Use 1.25sq 600V vinyl insulated cable (JISC3307) or equivalent as power supply cable.
Use the main ground wire longer than the L1 and L2 lines.
Fix the part of the AC cable sheath that is more inner than the cord bushing by 3 mm or more.
Use a solderless terminal for the end of the AC cable. For the main ground wire, use the solderless
terminal whose core wire and sheath are caulked separately (double caulking).
Connect the ground wire to the following:
M4 screw / round terminal of the main ground wire / tooth lock washer / casing
(3) For the reason of protection against injury, as necessary, provide adequate protection of the dedicated
cables (4-core signal cable and 2-core heater cable), which connect the detector and converter, and
power cable using wire protection tube, etc. Separate the signal cable from the power cable (noise
prevention).
(4) Install the signal cable as far as possible (30cm or more) from the heavy current lines to prevent
induced noise. Also, always ground a shield.
Note) For connection of the lines to the external terminals, use of ring crimp solderless terminal
with insulation sleeve is recommended.
(5) In the case of wiring work at the zone 1, take an appropriate prevention countermeasure against gas
flow to prevent explosive gas being flown into the zone 2 or unclassified area through a kind of duct
or protection tube. When connecting 2 cables, and connecting a cable and a cable covered with metal
tube for flameproof, use a flameproof-structured box.

- 10 - INZ-TN1ZKME-E
4.2 Wiring to terminals
4.2.1 How to open the cover
Loosen the hexagon socket head screw, and then rotate the cover to open.
(Use the supplied hexagon wrench.)
ZKM
Oxygen Analyzer
MODE ESC ENT
Fuji Electric Instrumentation Co.,Ltd.
CAUTION
POWEROFFANDKEEPOUT
WHENOPENTHISCOVER,
EXPLOSIVEATMOSPHERE
Oxygen Ana
MODE ESC ENTER
POWER
the same voltage of detector.
Power supply must be selected
HEATER
POWER
FUSE T 0.5A
POWER
ON
OFF
FUSE T 2.5A
1
15
2 3 4 5 6 7 8 9 10 11 12 13 14
16 17 18 19 20 21 22 23 24 25 2826 27
O2TC1 AO FAULT BLOW ZV HEATER
TC2 DI1 DI2 DI3 DI- ALARM MAIN- COM SV AC
NL
COM TENANCE
Hexagon socket
head screw

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INZ-TN1ZKME-E
4.3 Wiring to terminals
4.3.1 O2sensor input / Input method of O2sensor
thermocouple
c
MODE ESC
ENTER
POWER
Oxygen Analyzer
Grounding terminal
Terminal block
for communication
(TM2)
External terminal
block
(TM1)
Power cable
Main ground wire
Note 1: Fix the exclusive cable (O2sensor input / O2sensor thermocouple input) with the cable gland so
that its sheath is 10 mm or less.
When attaching the nut, turn it by hand until it does not move and then tighten it with a spanner
by about 1/4 turn.
4.3.2 Cable gland and input and output lines
For communication For contact In/Out For Other
For sensor signal For sensor power For output For power supply

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4.3.3 Allocation of the terminal block
(Note1) ••••23 24
(Note2) •••• Closedduringblowdownofdetector.(option)910
(Note6) ••••7 8
(Note7) •••• Closedwhileanoxygenconcentrationalarmisissued.21 22
(Note3) •••• Closedduringzerocalibration.25 11
•••• Closedduringspancalibration.25 26
Contact capacity: 250V 3A (resistance load)
(Note 4) 17
18
•••• Forvariouscontactinput(No-voltagecontact)
19
(Note5) •••• R-typethermocoupleinput
When combustion efficiency display (option) is selected.
1615
20
Closed during calibration, blow down, sensor diagnosis, PID auto tuning 
or sensor recovery of detector.
Closed while disconnection of O
2 sensor input or thermocouple input, or 
heater control temperature error is detected.
Communication terminal (TM2)
Terminal number Remark
RS232C
123
TXD RXD GND
RS485
Standard
OptionTRX+ TRX
- GND
External terminal (T
M
1) /
M
3 screw
1
15
2 3 4 5 6 7 8 9 1011121314
16 17 18 19 20 21 22 23 24 25 28 26 27
O
2
TC1 AO
FAULT
TC2 DI1 DI2 DI3 DICOM
ALARM MAINTE
BLOW
AC
LSVCOM AC N
or
HEATER
ZV
ZERO
GAS
SPAN
GAS
123
Exclusive
cable
O
2
sensor
input
O
2
sensor
thermocouple input
Analog output
4-20mA DC
or
0-1V DC
Full contact
output contact
capacity
250V AC / 3A
30V DC / 3A
Blow contact
output
250V AC / 3A
30V DC / 3A
(Note 6) (Note 2)
(Note 2)
(Note 5) (Note 4)
(Note 7) (Note 1) (Note 3)
O
2
sensor
heater power
output
Thermocouple
input
(combustion control)
Alarm contact
output
250V AC / 3A
30V DC / 3A
Maintenance
contact output
250V AC / 3A
30V DC / 3A
Calibrating gas
contact output
250V AC / 3A
30V DC / 3A Power supply
input
100V to 120V AC
or 200V to 240V AC
Contact input
Shorten: ON (Current 5mA DC)
Open: OFF (Open Voltge 5V DC)
M4 screw