TELEDYNE
ANALYTICAL INSTRUMENTS
OPERATING INSTRUCTIONS
Series Model 7500
Infrared Gas Analyzer
DANGER
HIGHLY TOXIC AND OR FLAMMABLE LIQUIDS OR GASES MAY BE PRESENT IN THIS
MONITORING SYSTEM.
PERSONAL PROTECTIVE EQUIPMENT MAY BE REQUIRED WHEN SERVICING THIS SYSTEM.
HAZARDOUS VOLTAGES EXIST ON CERTAIN COMPONENTS INTERNALLY WHICH MAY PERSIST
FOR A TIME EVEN AFTER THE POWER IS TURNED OFF AND DISCONNECTED.
ONLY AUTHORIZED PERSONNEL SHOULD CONDUCT MAINTENANCE AND/OR SERVICING.
BEFORE CONDUCTING ANY MAINTENANCE OR SERVICING CONSULT WITH AUTHORIZED
SUPERVISOR/MANAGER.
P/N
07/07/11
Teledyne Analytical Instruments
PREFACE
We are grateful for your purchase of Teledyne Analytical Instrumentʼs Model 7500 Infrared Gas
Analyzer.
• First read this instruction manual carefully until an adequate understanding is acquired, and then
proceed to installation, operation and maintenance of the analyzer. Wrong handling may cause an
accident or injury.
• The specications of this analyzer are subject to change without prior notice for further product
improvement.
• Modication of this analyzer is strictly prohibited unless a written approval is obtained from the
manufacturer. Teledyne will not bear any responsibility for a trouble caused by such a modication.
• This instruction manual shall be stored by the person who actually uses the 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:
Analyzer main frame (1)
Power cable (1)
Fuse (2) Rating : 1 A
Instruction manual (1)
Side rail (2) Option
• It is prohibited to transfer part or all of this manual without Teledyneʼs permission.
• Description in this manual is subject to change without prior notice for further improvement.
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Teledyne Analytical Instruments
SAFETY PRECAUTIONS
Please read this section carefully to ensure using 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 3 levels, “DANGER”, “CAUTION” and
“PROHIBITED”.
DANGER Wrong handling may cause a dangerous situation,
in which there is a risk of death or heavy injury.
CAUTION 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.
PROHIBITED Items which must not be done are noted.
Caution on installation and transport of gas analyzer
DANGER • This unit is not explosion-proof type. Do not
use it in a place with explosive gases to prevent
explosion, re or other serious accidents.
CAUTION • For installation, observe the rule on it given in the
instruction manual and select a place where the
weight of gas analyzer can be endured. Installation
at an unsuited place may cause turnover or fall
and there is a risk of injury.
• For lifting the gas analyzer, be sure to wear
protective gloves. Bare hands may invite an injury.
• Before transport, x the casing 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 cable chips or other foreign
objects. Otherwise, it may cause re, trouble or
malfunction of the unit.
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Teledyne Analytical Instruments
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, re 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 re or the like
accident may be caused.
Caution on wiring
CAUTION • Wiring work must be performed with the main
power set to OFF to prevent electric shocks.
• Enforce construction of class-D rounding wire by
all means. If the specied grounding construction
is neglected, a shock hazard or fault may be
caused.
• Wires should be the proper one meeting the
ratings of this instrument. If using a wire which
cannot endure the ratings, a re may occur.
• Be sure to use a power supply of correct rating.
Connection of power supply of incorrect rating may
cause re.
DANGER • For correct handling of calibration gas or other
CAUTION • Before leaving unused for a long time or
4 Model 7500 Instruction Manual
Caution on use
reference gases, carefully read their instruction
manuals beforehand. Otherwise, carbon monoxide
or other hazardous gases may cause an
intoxication particularly.
restarting after left at such a status for an
extended length of time, follow the directions of
each instruction manual because they are different
from normal starting or shutdown. Otherwise, the
performance may be poor and accidents or injuries
may be caused.
• Do not operate the analyzer for a long time with
its door left open. Otherwise, dust, foreign matter,
etc. may stick on internal walls, thereby causing
faults.
Teledyne Analytical Instruments
Caution on use
PROHIBITED • Do not allow metal, nger or others to touch the
input/output terminals in the instrument. Otherwise,
shock hazard or injury may occur.
• Do not smoke nor use a ame near the gas
analyzer. Otherwise, a re may be caused.
• Do not allow water to go into the gas analyzer.
Otherwise, hazard shock or re in the instrument
may be caused.
Caution on maintenance and check
DANGER • When doors are open during maintenance or
inspection, be sure to purge sufciently the inside
of the gas analyzer as well as the measuring
gas line with nitrogen or air, in order to prevent
poisoning, re or explosion due to gas leak.
CAUTION Be sure to observe the following for safe operation
avoiding the shock hazard and injury.
• Remove the watch and other metallic objects
before work.
• Do not touch the instrument wet-handed.
• 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.
• Do not use a replacement part other than
specied 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. For
details, follow the local ordinance.
CAUTION • If the cause of any fault cannot be determined
5 Model 7500 Instruction Manual
Others
despite reference to the instruction manual, be
sure to contact the factory. If the instrument is
disassembled carelessly, you may have a shock
hazard or injury.
Teledyne Analytical Instruments
CONTENTS
PREFACE .............................................................................................................................2
CAUTION ON SAFETY ..........................................................................................................3
1. OVERVIEW.........................................................................................................................8
2. NAME AND DESCRIPTION OF EACH PART ...................................................................9
2.1 Description of each unit ......................................................................................9
3. INSTALLATION ................................................................................................................10
3.1 Installation conditions ........................................................................................10
3.2 Installation of analyzer .......................................................................................11
3.3 Piping .................................................................................................................11
3.4 Sampling ............................................................................................................12
3.5 Wiring method ....................................................................................................15
4. OPERATION ................................................................................................... ..................24
4.1 Preparation for operation ....................................................................................24
4.2 Warm-up operation and regular operation ..........................................................24
5. DESCRIPTION OF DISPLAY AND OPERATION PANEL .................................................25
5.1 Name and description of operation panel ...........................................................25
5.2 Overview of display and operation panel ............................................................26
5.3 Overview of display screen .................................................................................27
5.4 General operation................................................................................................30
6. SETTING AND CALIBRATION...........................................................................................31
6.1 Changeover of range ..........................................................................................31
6.2 Calibration setting ...............................................................................................32
6.2.1 Setting of calibration concentration......................................................32
6.2.2 Setting of manual zero calibration ...................................................... 34
6.2.3 Setting of calibration range ..................................................................36
6.2.4 Setting of auto-calibration component .................................................38
6.3 Alarm setting ........................................................................................................40
6.3.1 Setting of alarm values ........................................................................40
6.3.2 Hysteresis setting ................................................................................42
6.4 Setting of auto calibration ....................................................................................43
6.4.1 Auto calibration ....................................................................................43
6.4.2 Forced stop of auto calibration ............................................................45
6.5 Setting of auto zero calibration ............................................................................47
6.5.1 Auto zero calibration ............................................................................47
6.5.2 Forced stop of auto zero calibration ....................................................49
6.6 Peak alarm setting ...............................................................................................51
6.7 Parameter setting ................................................................................................53
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6.8 Maintenance mode …………………………………………………………………… 57
6.9 Calibration …………………………………………………………………………… .. 59
6.9.1 Zero calibration …………………………………………………………… 59
6.9.2 Span calibration ………………………………………………………….. 60
7. MAINTENANCE ................................................................................................... 61
7.1 Daily check ............................................................................................ 61
7.2 Daily check and maintenance procedures ............................................ 61
7.3 Cleaning of measuring cell .................................................................... 62
7.3.1 Disassembly and assembly of measuring cell ....................... 62
7.3.2 How to clean cell ……………………………………………….. 67
8. TROUBLESHOOTING ......................................................................................... 68
8.1 Error message .......................................................................................... 68
9. SPECIFICATIONS ............................................................................................... 70
9.1 Specifications ………………………………………………………………. 70
9.2 Code symbols ………………………………………………………………. 73
9.3 Outline diagram …………………………………………………………….. 78
APPENDIX ………………………………………………………………………………… 80
Drawing List ............................................................................................................. 80
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Teledyne Analytical Instruments
1. OVERVIEW
The Model 7500 infrared gas analyzer measures the concentrations of CO2, CO, CH4, SO2 and O2
contained in sample gas. CO2, CO, CH4 and SO2 are measured by non-dispersion infrared method,
while O2 is measured by paramagnetic method. A maximum of 4 components including O2 (a maximum
of 3 components for other than O2 measurement) are simultaneously measurable.
A high-sensitivity mass ow sensor is used in the detector unit of infrared method. Due to use of single
beam system for measurement, maintenance is easy and an excellent stability is ensured for a long
period of time.
In addition, a microprocessor is built in and a large sized liquid crystal display is provided for easier
operation, higher accuracy and more functions.
This analyzer is thus optimum for combustion control of various industrial furnaces, botanical study and
global atmospheric research.
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Teledyne Analytical Instruments
2. NAME AND DESCRIPTION OF EACH PART
2.1 Description of each unit
Name Description
1. Handle Draws the analyzer unit from the case.
2. Power switch Turns ON/OFF this analyzer.
3. Switch for back light Turn ON/OFF the back light of display.
4. Display / Operation panel Liquid crystal display and keys for various
operational settings are arranged.
5. Sampling gas inlet Port for connecting the sample gas injection pipe.
6. Sampling gas outlet Port for connecting the pipe for discharging the
gas after analysis.
7. Purge gas inlet Port for connecting the purge gas pipe.
8. Terminal block 1 Analog output terminals
9. Terminal block 2 Analog signal and contact input terminals
10. Terminal block 3 Contact output terminals
11. Terminal block 4 Contact output terminal
12. Terminal block 5 Alarm output terminal
13. Connector 2 Communication interface
14. Power inlet Used to connect the power cable.
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Teledyne Analytical Instruments
3. INSTALLATION
DANGER
This unit is not explosion-proof type. Do not use it in a place with explosive gases to avoid explosion, re
or other serious accidents.
CAUTION
• For installation, observe the rule on it given in the instruction manual and select a place where the
weight of gas analyzer can be endured. Installation at an unsuited place may cause turnover or fall and
there is a risk of injury.
• For lifting the gas analyzer, be sure to wear protective gloves. Bare hands may invite an injury.
• Before transport, x the casing so that it will not open. Otherwise, the casing may be separated and fall
to cause an injury.
• The gas analyzer is heavy. It should be transported carefully by two or more persons if manually
required. Otherwise, body may be damaged or injured.
• During installation work, care should be taken to keep the unit free from cable chips or other foreign
objects. Otherwise, it may cause re, trouble or malfunction of the unit.
3.1 Installation conditions
To install the analyzer for optimum performance, select a location that meets the following conditions:
(1) Use this instrument indoors.
(2) A vibration-free place
(3) A place which is clean around the analyzer.
(4) Power supply
Rated voltage: 100V to 240VAC
Operating voltage: 85V to 264VAC
Rated frequency: 50/60 Hz
Power consumption: 70 VA max.
Inlet: Conformity to EN60320 class I type 3-pin inlet
(5) Operation conditions
Ambient temperature: -5 to 45°C
Ambient humidity: 90% RH or less, no condensation
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3.2 Installation of analyzer
There are two methods of installing the analyzer.
For detailed dimensions, see Chapter 9.3.
Note: The mounting method should be selected to meet the installation requirements since the top cover
must be detached from the gas analyzer for maintenance and check.
Mounting method Conditions Remarks
Slide rail No maintenance space is
provided at the top.
Guide rail Maintenance space is provided
at the top
Recommended slide rail: 305A-20, Accuride International Inc.
These methods must be rigid enough to
withstand the mass (about 10 kg) of the
gas analyzer.
3.3 Piping
Caution on piping
CAUTION 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, re 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 re or the like accident may be caused.
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Teledyne Analytical Instruments
Observe the following when connecting the gas pipes.
• The pipes should be connected to the gas inlet and outlet at the rear panel of the analyzer, respectively.
• Connect the sampling system to the instrument by using corrosion-resistant tube such as Teon,
stainless steel, or polyethylene. In case where there is no danger of corrosion, donʼt use rubber or soft
vinyl tube. Analyzer indication may become inaccurate due to the adsorption of gases.
• Piping connections are Rc1/4 (NPT1/4) female-threaded. Cut the pipe as short as possible for quick
response. Pipe of ø 4mm (inside diameter) is recommendable.
• Entry of dust in the instrument may cause operation fault. Use clean pipes and couplings.
Sampling gas inlet: Connect the pipe so that zero/span calibration standard gas or measured gas
pre-treated with dehumidication is supplied properly. The gas ow rate should
be kept constant within the range of 1 L/min ±0.5 L/min.
Sampling gas outlet: Measured gas is exhausted after measurement.
Connect the pipe so that the gas may escape through the gas outlet into the
atmosphere.
Purge gas inlet: It is used for purging the inside of the total gas analyzer. When the analyzer must
be purged, refer to Item 3.4, Purging inside Analyzer. Use dry gas N2 or
instrumentation air for purge gas. (ow rate of 1 L/min or more should be used
and no dust or mist is contained).
3.4 Sampling
(1) Conditions of sample gas
1. The dust contained in sample gas should be eliminated completely with lters. The lter at the
nal stage should be capable of eliminating dust of 0.3 microns.
2. The dew point of sample gas must be lower than the ambient temperature for preventing
formation of drain in the analyzer. If water vapor is contained in sample gas, its dew point should be
reduced down to about 0°C through a dehumidier.
3 If SO3 mist is contained in sample gas, the mist should be eliminated with a mist lter, cooler, etc.
Eliminate other mist in the same way.
4. If a large amount of highly corrosive gas such as Cl2, F2 or HCl is contained in sample gas, the
service life of analyzer will be shortened. So, avoid such gases.
5. Sample gas temperature is allowed within a range from 0 to 50°C. Pay attention not to ow hot
gas directly into the analyzer.
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Teledyne Analytical Instruments
(2) Sampling gas ow rate
A ow rate of sampling gas must be 1 L/min ±0.5 L/min. A ow meter should be provided as
shown in Fig. 3-2 to measure ow rate values.
(3) Preparation for standard gas
Prepare the standard gas for zero/span calibration.
No O2 meter Built in O2 meter Externally mounted
zirconia O2 meter
Zero gas N2 gas N2 gas Dry air or air (No
calibration performed
with CO2 meter)
Span gas except for O2 Gas with concentration
of 90% or more of full
scale
Span gas for O2 Gas with concentration
Gas with concentration
of 90% or more of full
scale
of 90% or more of full
scale
Gas with concentration
of 90% or more of full
scale
1 to 2% of O2 gas
(4) Purging of instrument inside
The inside of instrument need not be purged generally except for the following cases.
1. A combustible gas component is contained in sample gas.
2. Corrosive gas is contained in the atmospheric air at the installation site.
3. The same gas as the sample gas component is contained in the atmospheric air at the installation
site.
In such cases as above, the inside of analyzer should be purged with the air for instrumentation or N2.
Purging ow rate should be about 1L/min.
If dust or mist is contained in purging gas, it should be eliminated completely in advance.
(5) Pressure at sampling gas outlet
Pressure at the sampling gas outlet should be set to atmospheric pressure.
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Teledyne Analytical Instruments
(6) Example of sampling system conguration
The system conguration may vary depending upon the nature of measured gas, coexistent gases or
application. A typical conguration diagram is shown in Fig. 3-2. Since a system conguration depends
upon measured gas, consult with Teledyne.
Fig. 3-2 A typical example of sampling system
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Teledyne Analytical Instruments
3.5 Wiring method
Caution on wiring
CAUTION • Wiring work must be performed with the main
power set to OFF to prevent electric shocks.
• Enforce construction of class-D grounding wire
by all means.
If the specied grounding construction is
neglected, a shock hazard or fault may be caused.
• Wires should be the proper one meeting the
ratings of this instrument. If using a wire which
cannot endure the ratings, a re may occur.
• Be sure to use a power supply of correct rating.
Connection of power supply of incorrect rating may
cause re.
Each external terminal is provided on the rear panel of the analyzer. (See Fig. 3-3)
Wire each terminal, referring to Fig. 3-3 and (1) to (7).
Fig. 3-3 Rear panel
(1) Power inlet
When using supplied power cable, connect the female side to the power inlet at the rear panel of the
analyzer, and insert the male side into a receptacle matching the rating.
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Teledyne Analytical Instruments
When a noise source is in the vicinity
Do not install the analyzer near power noise generating electric equipment (such as high frequency
furnace and electric welder). If the analyzer must be used near such equipment, a separate power line
should be used for avoiding noise. In case noise may enter from a relay, solenoid valve, etc. through
power supply, connect a varistor (such as ENA211-2 made by Fuji Electric) or spark killer (like S1201
made by OKAYA) to the noise source as shown below. If the varistor or spark killer is located away from
the noise source, no effect is obtainable. So, locate near the noise source.
(2) Analog output signal (AO): terminal block 1 (1 to 10, 15 to 20)
Output signal: 4 to 20 mADC or 0 to 1 VDC (selected when ordering)
Non-insulated output
Allowable load: 4 to 20 mADC, 550Ω or less
0 to 1 VDC, 100kΩ or less
• Analog output is provided from each terminal corresponding to the channel displayed in the
measurement screen.
Note: All of analog output signals for the instrument are not isolated. It is recommended to isolate
signals individually to prevent interference from unnecessary signals or to prevent external interference,
especially leading the cable of more than 30 meters or to outdoor.
(3) O2 sensor input: terminal block 2 (1 – 2)
Input signal:
External zirconia O2 analyzer: Zirconia O2 sensor signal (Teledyne output)
External O2 analyzer: 0 to 1 VDC (DC input resistor of 1MΩ or more)
• It is used when the external zirconia O2 analyzer or external O2 analyzer is specied as order.
• To connect to the output of the external Zirconia analyzer or external O2 analyzer prepared separately.
• In case of an external O2 analyzer, input a signal of 0 to 1 VDC with respect to O2 full scale of the
analyzer.
• In case of built-in O2 analyzer, do not use the terminals.
Note: O2 sensor input is not isolated. It is recommended to isolate input signal to prevent interference
from unnecessary signals or to prevent external interference. Zirconia O2 sensor should be installed at a
location that is as close to this instrument as possible.
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(4) Contact input (DI): terminal block 2 (13 to 20), terminal block 3 (5 to 10)
• It is for a contact input at no voltage. An input is provided when switching to short circuit (on) or
open (off).
• No voltage is applied to the terminals
(5) Contact output (DO): terminal block 3 (13 to 20), terminal block 4 and terminal block 5
• Contact rating: 250VAC / 2A, load resistance
• An output is for a relay contact output. An output is provided when switching to conductive (on)
or open (off).
Note: The wires of analog output signals, O2 sensor input and contact input should be xed separately
from power supply wiring and contact output wiring.
(6) Communication interface: connector 2
• Please refer to the manual for communication function.
17 Model 7500 Instruction Manual
(7) List of terminal blocks 1 to 5
Teledyne Analytical Instruments
18 Model 7500 Instruction Manual
*1) Unused terminals are used for internal
connection and should not be used as repeating
terminals either.
*2) O2 sensor input is used when an external O2
analyzer is selected.
8) Description on terminal block
Terminal block 1 <TN1>
Terminal block for analog output (non-isolated output)
Output : 4 to 20 mA or 0 to 100V DC
Between 1 – 2: CH5 output
Between 3 – 4: CH4 output
Between 5 – 6: CH3 output
Between 7 – 8: CH2 output
Between 9 – 10: CH1 output
Between 11 – 14: For internal connection. Must not be
wired. (Must not be used as junction
terminal.)
Between 15 – 16: CH8 output
Between 17– 18: CH7 output
Between 19 – 20: CH6 output
Teledyne Analytical Instruments
Terminal block 2 <TN2>
Between 1– 2: For O2 sensor input. (Input for our
Zirconia oxygen sensor or external
O2 sensor. Must not be used unless
O2 meter is added.)
Between 3 –12: For internal connection. Must not be
wired. (Must not be used as junction
terminal.)
Between 13 – 14: CH4 remote range changeover input
Between 15 – 16: CH3 remote range changeover input
Between 17 – 18: CH2 remote range changeover input
Between 19 – 20: CH1 remote range changeover input
Note: High range is selected when open. Low range is
selected when short-circuited. For details of action, refer to “6.7
Parameters Setting, “Remote Range”.
19 Model 7500 Instruction Manual
Terminal block 3 <TN3>
Between 1 – 4: For internal connection. Must not be
wired. (Must not be used as junction
terminal.)
Between 5 – 6: Remote hold input. No hold when open.
Output hold when short-circuited.
Between 7 – 8: Average value reset input. Short circuiting the contact input (for at 1.5 sec
or more) resets O2 average and O2
correction average simultaneously.
Opening it restarts the average value.
Between 9 – 10: Automatic calibration remote start
input. Open input after strapping for
at least 1.5 seconds starts the automatic
calibration whether automatic calibration
setting is ON or OFF.
Between 11 – 12: Conductive when analyzer unit error
is producted. Normally open.
Teledyne Analytical Instruments
Between 13 – 14: CH4 range identication signal
Between 15 – 16: CH3 range identication signal
Between 17– 18: CH2 range identication signal
Between 19– 20: CH1 range identication signal
Note: Range identication signal is conductive at Low range
or open at High range. In case of 1-range system, the signal
remains open.
20 Model 7500 Instruction Manual
Terminal block 4 <TN4>
Between 1 – 2: CH4 span calibration contact output
Between 3 – 4: CH3 span calibration contact output
Between 5 – 6: CH2 span calibration contact output
Between 7 – 8: CH1 span calibration contact
Between 9 – 10: Zero calibration contact output When the
calibration contact output is measured with
manual calibration, the calibration contact
corresponding to calibration channel is
conductive.
For the automatic calibration, they are worked sequentially
according to “6.4 Auto calibration setting”. If calibration is not
performed, all of them are open.
Between 11 – 12: For internal connection. Must not be wired.
(Must not be used as junction terminal.)
Teledyne Analytical Instruments
Between 13 – 14: Automatic calibration in progress,
contact output.
Conductive during automatic calibration. Open
otherwise.
Between 15 – 16: Calibration error contact output. Conductive
when error is produced at zero or span
calibration. Normally open.
Between 17 – 18: Pump ON/OFF contact output. (Used for
turning ON/OFF the pump. Conductive during
measurement and open at zero span
calibration.)
21 Model 7500 Instruction Manual
Terminal block 5 <TN5>
1 and 11 – 14: For internal connection. Must not be
wired. (Must not be used as junction terminal.)
Between 2 - 3 and 3 - 4: CH3 alarm output. Conductive
at 2 – 3 and open at 3 – 4 when set value is exceeded.
Open at 2 – 3 and conductive at 3 – 4 otherwise.
Between 5 - 6 and 6 - 7: CH2 alarm output. Conductive
at 5 – 6 and open at 6 – 7 when set value is exceeded.
Open at 5 – 6 and conductive at 6 – 7 otherwise.
Between 8 - 9 and 9 - 10: CH1 alarm output. Conductive
at 8 – 9 and open at 9 – 10 when set value is exceeded.
Open at 8 – 9 and conductive at 9 – 10 otherwise.
Between 15 - 16 and 16 - 17: Peak count alarm contact
output. Conductive at 15 – 16 and open at 16 – 17 when
preset peak count is exceed. Otherwise, open at 15 – 16
and conductive at 16 – 17. For setting and action, refer
to instruction manual “6.6 Peak Alarm Setting”.
Teledyne Analytical Instruments
Between 18 – 19 and 19 – 20: CH4 alarm output.
Conductive at 18 – 19 and open at 19 – 20 when set
value is exceeded. Open at 18 – 19 and conductive at
19 – 20 otherwise.
22 Model 7500 Instruction Manual
(9) Timing of calibration contact output
1. Manual calibration (See “6.9 Calibration”)
Teledyne Analytical Instruments
2. In case of automatic calibration (example shown in 6.4.1, Automatic calibration settings)
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Teledyne Analytical Instruments
4. OPERATION
4.1 Preparation for operation
(1) Check of gas sampling tube, exhaust tube and wiring
Check that the pipes are correctly connected to the gas sampling port and drain port.
Check that the analyzer is correctly wired as specied.
4.2 Warm-up operation and regular operation
(1) Operation procedure
1. Turn ON the power switch at the left of the front panel.
In one or two seconds, the measurement screen will appear at the front panel.
2. About 2 hour warm-up operation
About 2 hours are needed until the operating performance is stabilized. Warm-up
operation should be continued with the power ON.
3. Setting of various set values
Set required set values according to Chapter 6, “Setting and calibration”.
4. Zero and span calibration
Perform zero calibration and span calibration after warm-up operation.
See Chapter 6.9, “Calibration”.
5. Introduction and measurement of measured gas
Start measurement by introducing measured gas into the analyzer.
Note: While in warm-up operation, the concentration reading may be beyond the upper limit of the range
(range-over) or below the lower limit. But this is not an error.
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Teledyne Analytical Instruments
5. DISPLAY AND OPERATION PANEL
This section describes the display and operation panel of the gas analyzer. It also explains the name and
description of function on the operation panel. See Fig. 5-1.
5.1 Name and description of operation panel
• Display: The measurement screen and the setting items are displayed.
• Controls: The conguration is as shown below.
Name Description Name Description
1. MODE key Used to switch the mode. 5. ESC key Used to return to a previous screen
2. SIDE key Used to change the selected
item (by moving the cursor) and
numeral digit.
3. UP key Used to change the selected
item (by moving the cursor) and
to increase numeral value.
4. DOWN key Used to change the selected
item (by moving the cursor) and
to decrease numeral value.
Fig. 5-1 Name and description of operation display and panel
Note: The switch for back light is used for turning ON/OFF the back light of display. The life time of back
light is 50,000 hours. Please turn OFF the switch when indicator is not necessary, so the life time will be
longer.
25 Model 7500 Instruction Manual
or cancel the setting midway.
6. ENT key Used for conrmation of selected
items or values, and for execution
of calibration.
7. ZERO key Used for zero calibration.
8. SPAN key Used for span calibration.
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5.2 Overview of display and operation panel
26 Model 7500 Instruction Manual
Figure 5.2
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5.3 Overview of display screen
(1) Measurement mode screen
On turning on the power switch, the Measurement Mode screen will appear.
The measurement screen depends on the number of components. The following screen conguration
shown as an example is for CO2, CO, O2 (Output at channel 6).
When channel 5 or later is displayed, scroll up or down key to view another conguration which is beyond
the screen.
No. Name Function No. Name Description
1 Component
display
2 Concentration
display
3 Range display Displays range
4 Unit display Displays unit with ppm
Displays component
of instantaneous
value, converted
instantaneous value,
converted average
value, etc.
Displays measured
value of concentration.
values.
and vol%.
5 Peak alarm
component
display
6 Peak alarm
concentration
display
7 Peak alarm count Displays the alarm
8 Peak alarm unit
display
Displays peak alarm
component.
Displays peak alarm
concentration (Upper
limit value).
times exceeding the
peak value.
Displays unit of peak
alarm with times/h.
Fig. 5-3 Name and function of measurement mode screen
• Instantaneous value and concentration value:
The concentration display of CH (component) where sampling components such as “CO2”, “CO” or
“O2 are displayed in the component display, indicates current concentration values of the measured
components contained in gas that is now under measurement.
• O2 correction concentration values:
CH (components) where “cv**” is displayed as “cv CO” in the component display are calculated from the
following equation, by setting sampling components, O2 instantaneous / concentration values and O2
correction reference value (see item 6.8).
Conversion output=
On: The value of the O2 correction reference value (Value set by application)
Os: Oxygen concentration (%)
Cs: Concentration of relevant measured component
K: The value of the fractional part is this equation.
Where, K is When K ≥ 4, K=4. When K < 0, K=4. When Cs < 0, K=0.
The correction components are CO and SO2 only.
27 Model 7500 Instruction Manual
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• O2 correction concentration average value:
CH (component) where “AV / CV” is displayed as “AV / CV CO” in the component display and O2 average
value, a value obtained by averaging O2 conversion concentration value or O2 concentration value in a
xed time is output every 30 seconds.
Averaging time can be changed between 1 minute and 59 minutes or 1 hour and 4 hours according to the
average time settings (See 6.7 Parameter setting).
(The set time is displayed as “1h”, for instance, in the Range display.)
* The measurement ranges of O2 correction concentration value and O2 correction concentration
average value are the same as that of the measuring components. Also, the measurement range of O2
average value is the same as that of O2.
(2) Setting/selection screen
The setting/selection screen is congured as shown below:
• In the status display area, the current status is displayed.
• In the message display area, messages associated with operation are displayed.
• In the setting item and selection item display area, items or values to be set are displayed, as required.
To work on the area, move the cursor to any item by using up, down, and right keys.
28 Model 7500 Instruction Manual
Figure 5-4: Display screen
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(3) Contents of measured channel (CH)
The contents in each measured CH corresponding to the type are given below:
Type code Contents
5th
digit
Y C Y O2
A Y Y SO2
B Y Y CO
D Y Y CO2
E Y Y CH4
2 Y Y CO2 CO
3 Y Y CH4 CO
4 Y Y CO2 CH4
5 Y Y CO2 CO CH4
A A, B, C Y SO2 O2
B A, B, C Y, B CO O2
D A, B, C Y CO2 O2
E A, B, C Y CH4 O2
2 A, B, C Y, B CO2 CO O2
3 A, B, C Y, B CH4 CO O2
4 A, B, C Y CO2 CH4 O2
5 A, B, C Y CO2 CO CH4 O2
A A, B, C A SO2 O2 Corrected
B A, B, C A, C CO O2 Corrected COCorrected
2 A, B, C A, C CO2 CO O2 Corrected
3 A, B, C A, C CH4 CO O2 Corrected
5 A, B, C A, C CO CO CH4 O2 Corrected
6th digit 7th
digit
CH1 CH2 CH3 CH4 CH5 CH6 CH7
SO2
Corrected
SO2
average
CO
average
CO
CO
O2
average
O2
average
Corrected
CO
average
Corrected
CO
average
CO
O2
average
O2
average
Corrected
CO
average
O2
average
How to view the Table
When SO2 is displayed in CH1, it means that display and output of CH1 correspond to SO2 component.
29 Model 7500 Instruction Manual
5.4 General operation
• Measurement mode
The measurement mode can be displayed for up
to 5 channels in a single screen. When viewing
a channel beyond the 5 channels, press the ( or
) key and the screen can be scrolled one by one
channel at a time.
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• User mode displays the following settings
Changeover of range
Calibration setting
Alarm setting
Setting of auto calibration
Setting of auto zero calibration
Peak alarm setting
Parameter setting
For settings, refer to “6, Setting and Calibration.”
30 Model 7500 Instruction Manual
6. SETTING AND
CALIBRATION
6.1 Changeover of range
This mode is used to select the ranges of measured
components.
1. During measurement, press the MODE key to display
the User mode.
2. Point the cursor to “Changeover of Range”. Press the
ENT key.
3 The “Channel Selection” screen appears. Press the UP
or DOWN key until the cursor moved selects a desired
CH (component).
4. After selection, press the ENT key.
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Note: The range of O2 correction instantaneous values
and O2 correction average values is automatically
switched by changing the range of instantaneous value
of each CH (component).
5. In the Range Setting screen that appears, move the
cursor by pressing the UP or DOWN key to select the
range. (The range with a TRIANGLE mark is currently
selected.)
6. After selection, press the ENT key.
7. Measurement is conducted within the selected range.
The range identication signal (CO) is shorted with the
low range (Range 1), and open with the high range
(Range 2).
Note: If the Remote Range is set to ON, the changeover
of range cannot be performed on the screen.
To close Changeover of range
To close Changeover of range, or cancel the command
midway, press the ESC key. A previous screen will
return.
31 Model 7500 Instruction Manual
6.2 Calibration setting
This mode is used to set calibration concentration and
actions. The calibration setting involves calibration
concentration, zero calibration, calibration range and
auto-calibration component.
6.2.1 Setting of calibration concentration
It allows you to set concentrations of the standard gas
(zero and span) of each channel used for calibration.
1. During measurement, press the MODE key to display
the User mode.
2. Point the cursor to “Setting about Calibration” by
pressing the UP or DOWN key. Press the ENT key.
3. In the “Setting about Calibration” screen that appears,
point the cursor to “Calibration Value” by pressing the UP
or DOWN key. Press the ENT key.
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4. In the “Calibration Concentration CH Selection”
screen that appears, point the cursor to CH you want to
set by using the UP or DOWN key. Press the ENT key.
32 Model 7500 Instruction Manual
5. In the “Calibration Concentration Selection” screen
that appears, select any concentration item you want to
set by pressing the UP, DOWN, and RIGHT key.
Note: Analyzers other than the zirconia O2 instrument
cannot perform zero setting.
6. In the “Calibration Concentration Value Setting”
screen that appears, enter calibration gas concentration
values (zero and span). For value entry, press the UP or
DOWN key, and a 1-digit value increases or decreases.
By pressing the RIGHT key, the digit moves.
After setting, save the entry by pressing the ENT key.
The saved value becomes valid from the next calibration
process.
Note: Enter the set values corresponding to each range.
When the O2 measurement uses atmospheric air for the
zero gas, set the concentration value to 21.00. When
the cylinder air is used, set to the concentration value as
indicated on the cylinder.
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To close the setting
To close the calibration concentration value setting
process or cancel this mode midway, press the ESC key.
A previous screen will return.
Setting range of values
Paramagnetic O2, CO2, CO, SO2 and CH4
measurement:
Zero gas: Fixed at 0
Span gas: Minimum digit, 1 to 100% of full
scale
(Full scale (FS) is the same as each range
value.)
Zirconia O2 measurement :
Zero gas: 5 to 25 vol%
Span gas: 0.01 to 5 vol%
The setting cannot be performed beyond the range.
33 Model 7500 Instruction Manual
6.2.2 Setting of manual zero calibration
If zero calibration is to be made manually, select whether
to calibrate all components at once or each of them
separately upon selection.
1. During measurement, press the MODE key to display
the User mode.
2. Point the cursor to “Setting about Calibration” by
pressing the UP or DOWN key. Press the ENT key.
3. In the “Setting about Calibration” screen that appears,
point the cursor to “About ZERO Calibration” by pressing
the or key. Press the ENT key.
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4. In the “Manual Calibration CH Selection” screen that
appears, point the cursor to CH you want to set by using
the UP or DOWN key. Press the ENT key.
34 Model 7500 Instruction Manual
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5. In the “Manual Calibration Selection” screen that appears, select “At once” or “Each” by pressing the
UP or DOWN key. When selecting “Both”, the CH (components) to be set can be zero-calibrated at the
same time. When selecting “Each”, either of the CH (components) to be selected is zero-calibrated. After
setting, press the ENT key, and the calibration you specied is
carried out.
To close “About ZERO Calibration”
To close “About ZERO Calibration” setting or to cancel this
mode midway, press the ESC key. A previous screen will
return.
EXAMPLE
Whether upon selection or at once can be determined for each
CH (component).
•Setting upon selection
Select the CH (component) and then perform zero
calibration on the manual zero calibration
screen.
•Setting at once
At a manual zero calibration, CHs (components) for which “at once” was selected can
simultaneously be calibrated.
* When the zirconia O2 analyzer uses the cylinder air or atmospheric air for the zero gas, select “At once”.
Manual Calibration screen
35 Model 7500 Instruction Manual
6.2.3 Setting of calibration range
This mode is used to set if the range of each CH
(component) at the calibration manual calibration or auto
calibration) should be calibrated with a single range or 2
ranges.
1. During measurement, press the MODE key to display
the User mode.
2. Point the cursor to “Setting about Calibration” by
pressing the UP or DOWN key. Press the ENT key.
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3. In the “Setting about Calibration” screen that appears,
point the cursor to “About Calibration Range” by pressing
the UP or DOWN key. Press the ENT key.
4. In the “Calibration Range CH Selection” screen that
appears, point the cursor to the CH you want to set by
pressing the UP or DOWN key. Press the ENT key.
36 Model 7500 Instruction Manual
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5. In the “Calibration Selection” screen that appears, select “Both” or “Current” by pressing the UP or
DOWN key.
• When selecting “both”, Range 1 and Range 2 of the set CH
are calibrated together.
• When selecting “Current”, the range alone displayed at the
set CH is calibrated.
To close “Setting of Calibration Range”
To close “Setting of Calibration Range” or to cancel this mode
midway, press the ESC key. A previous screen will return.
EXAMPLE:
CH1
CO2
CH2
CO
CH1: Range 1 and Range 2 are calibrated together, with zero or span calibration.
CH2: Only currently displayed range is calibrated, with zero or span calibration.
Manual Calibration screen
In case of “both” setting
Range 1: 0 to 10 vol%
Range 2: 0 to 20 vol%
Range 1: 0 to 500 ppm
Range 2: 0 to 2000 ppm
both
current
Two cursors will appear in both ranges.
Note: When calibration is performed by the “Both” setting under the normal operating condition, prepare a
span gas cylinder on the normal operating range side. It is recommend to perform span gas calibration in
the normal operating range. The other range that is calibrated by “Both” may result in some error (max. of
±5% of FS).
37 Model 7500 Instruction Manual
6.2.4 Setting of auto-calibration component
It sets the CH (component) to be calibrated in the autocalibration.
1. During measurement, press the MODE key to display
the User mode.
2. Point the cursor to “Setting about Calibration” by
pressing the UP or DOWN key. Press the ENT key.
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3. In the “Setting about Calibration” screen that appears,
point the cursor to “Auto Calibration Components” by
pressing the UP or DOWN key. Press the ENT key.
4. In the “Auto Calibration Components” selection screen
that appears, point the cursor to the CH you want to set
by pressing the UP or DOWN key. Press the ENT key.
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5. In the “Auto Calibration Selection” screen that appears, select “enable” or “disable” by pressing the UP
or DOWN key. After setting, press the ENT key.
To close Auto Calibration Component setting
To close “Setting of Auto Calibration Component” or to
cancel this mode midway, press the ESC key. A previous
screen will return.
Example
Auto calibration is made in the following rules according to the setting.
1. Zero calibration at once of CHs (components) which were set to “enable”.
2. The span of CHs (components) which were set to “enable” is calibrated in the
ascending order of CH number.
Example 1. In case all of CH1: CO2, CH2: CO, CH3: O2, were set to “enable”.
Zero calibration (at once) of CH1 to CH3 n span calibration of CH1 (CO2) n
span calibration of CH2 (CO) n span calibration of CH3 (O2)
Example 2. In case, out of CH1: CO2, CH2: CO and CH3: O2, CH1 ( CO2) was set to “enable”,
CH2 (CO) was set to “enable” an CH3 (O2) was set to “disable”.
Zero calibration (at once) of CH1 and 2 n span calibration of CH1 (CO2) n
span calibration of CH2 (CO)
CAUTION
The components which were set to “enable” is calibrated to zero at once at the time of auto calibration
regardless of setting in “6.2.2 Setting of manual zero calibration”.
39 Model 7500 Instruction Manual
6.3 Alarm setting
6.3.1 Setting of alarm values
This mode is used to set the upper and lower limit value
to provide an alarm output during measurement. Before
changing the alarm setting, set the ON/OFF to OFF.
1. During measurement, press the MODE key to display
the User mode.
2. Point the cursor to “Alarm Setting” by pressing the UP
or DOWN key. Press the ENT key.
3. After the alarm setting CH selection screen has
appeared, operate the UP or DOWN key until the cursor
is aligned with a desired CH and press the ENT key.
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4. After the alarm item selection screen has appeared,
operate the or key until the cursor is aligned with a
desired item and press the ENT key.
CAUTION
Set the values so that upper limit value > lower limit
value and that (upper limit value - lower limit value) >
hysteresis error.
The alarm is activated in each range independently from
the settings of each range.
40 Model 7500 Instruction Manual
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After setting, the alarm setting is now completed by pressing the ENT key.
To close the “Alarm Setting”
To close the “ Alarm Setting” or to cancel this mode midway,
press the ESC key.
A previous screen will return.
Setting range
0 to 100% FS (Settable in each range).
Description of setting items
Upper limit value: Sets the upper limit value (concentration) of alarm.
Lower limit value: Sets the lower limit value (concentration) of alarm.
Contact action: Selects one of upper limit alarm, lower limit alarm, and upper limit or lower limit
alarm.
Upper limit alarm ... Alarm contact operates when above upper limit value.
Lower limit alarm ... Alarm contact operates when below lower limit value.
Upper limit alarm or lower limit alarm ...Alarm contact operates when above upper limit value or
below lower limit value.
ON/OFF: Enables the alarm function if set at ON, or disables the alarm function if set at OFF.
* The upper limit value cannot be set below the lower limit value, and the lower limit value cannot be set
above the upper limit value.
If it is desired to set the upper limit value below the lower limit value already stored in the memory, reduce
the lower limit value beforehand, or vice versa.
Typical on-screen display when an alarm occurs
When an upper limit alarm has occurred, the “High alarm” message
lights at CH (component)
(“Low alarm” at lower limit alarm).
CAUTION
For 10 minutes after turning on power, the alarm judgment is inactive.
41 Model 7500 Instruction Manual
6.3.2 Hysteresis setting
To prevent chattering of an alarm output near the alarm
setting values, set hysteresis.
1. In the “Alarm Setting CH Selection” screen that
appears, point the cursor to “Hysteresis” by pressing the
UP or DOWN key. Press the ENT key.
2. In the “Hysteresis Value Setting” screen that appears,
enter hysteresis values. For the value entry, 1-digit value
is increased or decreased by pressing the UP or DOWN
key, and pressing the RIGHT key moves the digit. After
setting, press the ENT key to carry out hysteresis.
To close Hysteresis Setting
To close the “Hysteresis Setting” or cancel the mode
midway, press the ESC key. A previous screen will
return.
Setting range
0 to 20% of full scale
A full scale means each range provides a full scale of
width.
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Caution
The hysteresis is common to all CHs (components).
Hysteresis
If hysteresis values exceed the upper limit value as
shown in graph, an alarm output is provided. Once the
alarm output is turned ON, it remains ON until the value
falls below the set lower limit of the hysteresis indication.
42 Model 7500 Instruction Manual
6.4 Setting of auto calibration
6.4.1 Auto calibration
Auto calibration is automatically carried out when zero
calibration and span calibration are set.
Before changing the setting of auto calibration, set the
ON/OFF to OFF.
1. During measurement, press the MODE key to display
the User mode.
2. Point the cursor to “Setting of Auto Calibration” by
pressing the or key. Press the ENT key.
3. In the “Setting of Auto Calibration” screen that
appears, point the cursor to any item you want by
pressing the UP or DOWN key. Press the ENT key.
4. In the “Auto Calibration Parameter Setting” screen
that appears, perform the value entry or the setting. For
the value entry or setting change, use the UP or DOWN
key. For the value entry and setting, use the UP or
DOWN key. To change the setting, use the RIGHT key to
move the cursor to the right.
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After setting, press the ENT key, and auto calibration is
carried out by the entered setting value.
Description of setting items
• Start Time: Setting at the rst calibration (day of the
week, hour, minute)
• Cycle: A period between the start time of one
calibration and another (unit : hour/day)
• Flow Time: The time required for the calibration gas to
be replaced in the cell
• ON/OFF: Auto zero calibration ON or OFF
To close Setting of Auto calibration
To close the “Setting of Auto calibration” or cancel this
mode midway, press the ESC key. A previous screen will
return.
43 Model 7500 Instruction Manual
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Auto calibration status contact output is closed during auto calibration, and is open in other cases.
Setting range
Cycle: 1 to 99 hours or 1 to 40 days (initial value 7 days)
Flow time: 60 to 599 sec (initial value 300sec)
CAUTION
When an auto calibration starts, the measurement screen automatically appears.
Any operation other than forced stop of auto calibration (see Item 6.4.2) is not permitted during auto
calibration. “Auto Calibration Cancel” cannot be performed with the key lock to ON. To cancel auto
calibration forcedly, set the key lock to OFF and then execute “Auto Calibration Cancel”.
Remote start
Whether the auto calibration is set at ON or OFF, an auto calibration is available by keeping the remote
start input short-circuited for at least 1.5 seconds.
44 Model 7500 Instruction Manual
6.4.2 Forced stop of auto calibration
This mode is used to cancel the auto calibration forcedly.
1. In the Menu mode that is displayed, point the cursor
to “Setting of Auto Calibration” by pressing the UP or
DOWN key. Press the ENT key.
2. In the “Setting of Auto Calibration” item selection
screen that appears, point the cursor to “Setting of Auto
Calibration” by pressing the UP or DOWN key. Press the
ENT key.
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3. “Stop Auto Calibration” is inverted. A message
appears, prompting you to verify that you want to
cancel or continue auto calibration. To cancel the auto
calibration, press the ENT key. If you press the ESC key,
auto calibration is not stopped.
45 Model 7500 Instruction Manual
“Auto Calibration” screen
Example
In case where setting the auto calibration components
(see Item 6.2.4) to “CH1: enable” and “CH2: enable”.
• Zero calibration
A message, “Zero calibration” blinks at CH1 and CH2.
• CH1 span calibration
A message, “Span calibration” blinks at CH1.
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• CH2 span calibration
A message, “Span calibration” blinks at CH2.
CAUTION
During auto calibration, any key operation is not
permitted other than operations such as key lock ON/
OFF and “Stop Auto Calibration”. When the key lock is
set at ON, even the “Stop Auto Calibration” cannot be
used. To stop “Auto Calibration” forcedly, set the key lock
to OFF and then execute “Stop Auto Calibration”.
46 Model 7500 Instruction Manual
6.5 Setting of auto zero calibration
6.5.1 Auto zero calibration
Auto zero calibration is automatically carried out when
zero calibration are set.
Components for which a calibration is to be made are
determined by setting of auto calibration component in
6.2.4.
Before changing the setting of auto zero calibration, set
the ON/OFF to OFF.
1. During measurement, press the MODE key to display
the User mode.
2. Point the cursor to “Setting of Auto Zero Calibration”
by pressing the UP or DOWN key. Press the ENT key.
3. In the “Setting of Auto Zero Calibration” screen that
appears, point the cursor to any item you want by
pressing the UP or DOWN key. Press the ENT key.
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4. In the “Auto Zero Calibration Parameter Setting”
screen that appears, perform the value entry or the
setting. For the value entry or setting change, use the
UP or DOWN key. To change the setting, use the RIGHT
key to move the cursor to the right.
After setting, press the ENT key, and auto zero
calibration is carried out by the entered setting value.
Description of setting items
• Start Time: Setting at the rst calibration (day of the
week, hour, minute)
• Cycle: A period between the start time of one
calibration and another (unit : hour/day)
• Flow Time: The time required for the calibration gas to
be replaced in the cell
• ON/OFF: Auto zero calibration ON or OFF
To close “Auto Zero Calibration”
To close the “ Auto Zero Calibration “ or cancel this
mode midway, press the ESC key. A previous screen will
return.
47 Model 7500 Instruction Manual
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Auto calibration status contact output is closed during auto zero calibration, and is open in other
cases.
Setting range
Cycle: 1 to 99 hours or 1 to 40 days (initial value 7 days)
Flow time: 60 to 599 sec (initial value 300 sec)
Caution
• When an auto zero calibration starts, the measurement screen automatically appears.
• Any operation other than forced stop of auto zero calibration (see Item 6.5.2) is not permitted during auto
zero calibration. “Auto Zero Calibration Cancel” cannot be performed with the key lock to ON. To cancel
auto zero calibration forcedly, set the key lock to OFF and then execute “Auto Zero Calibration Cancel”.
• If the auto calibration period and auto zero calibration period have overlapped, the auto calibration is
retained, ignoring the auto zero calibration of that period.
48 Model 7500 Instruction Manual
6.5.2 Forced stop of auto zero calibration
This mode is used to cancel the auto zero calibration
forcedly.
1. In the Menu mode that is displayed, point the cursor to
“Setting of Auto Zero Calibration” by pressing the UP or
DOWN key. Press the ENT key.
2. In the “Setting of Auto Zero Calibration” item selection
screen that appears, point the cursor to “Setting of Auto
Zero Calibration” by pressing the UP or DOWN key.
Press the key.
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3. “Stop Auto Zero Calibration” is inverted. A message
appears, prompting you to verify that you want to cancel
or continue auto zero calibration. To cancel the auto zero
calibration, press the ENT key. If you press the ESC key,
auto zero calibration is not stopped.
49 Model 7500 Instruction Manual
“Auto Zero Calibration” screen
Example
In case where setting the auto calibration components
(see Item 6.2.4) to “CH1: enable” and “CH2: enable”.
• Zero calibration
A message, “Zero calibration” blinks at CH1
and CH2.
CAUTION
During auto zero calibration, any key operation is not
permitted other than operations such as key lock ON/
OFF and “Stop Auto Zero Calibration”.
When the key lock is set at ON, even the “Stop Auto
Zero Calibration” cannot be used. To stop “Auto Zero
Calibration” forcedly, set the key lock to OFF and then
execute “Stop Auto Zero Calibration”.
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50 Model 7500 Instruction Manual
6.6 Peak alarm setting
When the number of peaks of which CO concentration
exceeds the upper limit value exceeds the setting time, a
peak alarm is outputted.
This section describes how to perform various settings of
peak alarm.
Note: The setting is optional and is valid only when peak
alarm function is provided.
1. Press the MODE key in the Measurement mode, and
the User mode appears.
2. Point the cursor to “Setting of Peak Alarm” by pressing
the or key. Press the ENT key.
3. In the “Peak Alarm Setting” item selection screen
that appears, point the cursor to any item you want by
pressing the UP or DOWN key. Press the ENT key.
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4. Then, enter numeric values and perform the setting.
Entering or setting the numeric values should be carried
out by using the UP or DOWN key.
After setting, press the ENT key, and the set values you
entered are saved.
Description of setting items
• Peak Alarm: Setting of peak alarm is performed with
ON/OFF.
• Alarm value: If peak concentrations exceed the set
alarm value, a peak counter counts 1 time.
• Alarm Count: When a peak in excess of the setting time
occurs, a peak count alarm output is provided.
• Hysteresis: To prevent possible chattering when the
peak value may exceed the set peak concentration by
only 1 time, the peak count has an allowance in the
hysteresis width.
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Setting range
• Alarm Value: 0 to 1000 ppm 5 ppm step (initial value: 500 ppm)
• Alarm Count: 1 to 99 times (initial value: 5 times)
• Hysteresis: 0 to 20% of full scale (initial value: 0% of full scale)
* The hysteresis setting is made in terms of full scale.
Action of peak alarm
If CO concentration exceeds the alarm value, counting will begin. If the number of peaks is over the set
times per hour, a peak count alarm becomes closed (ON). If it is less than the set times per hour, it is
open (OFF). Since 5 times of peaks /hour is marked at 1 section from the above graph, the peak count
alarm is turned ON. Since peaks of more than 5 times per 1 hour occur at the interval between 1 and 2 ,
the peak count alarm remains ON. Since peaks are reduced to 4 times per hour, it is turned OFF.
Like the hysteresis of the alarm setting , the hysteresis prevents possible chattering when measured gas
is uctuated near the alarm value.
* For 10 minutes after the power is turned ON, a peak alarm counting is not carried out.
Releasing peak alarm
To release the peak alarm, set the peak alarm to OFF.
Turning on the peak alarm initiates counting from 0.
52 Model 7500 Instruction Manual
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6.7 Parameter setting
It allows you to carry out the parameter setting such as time, key lock, etc., as required. Items to be set
are as follows:
Description of setting items
• Current Time: Sets the current day of the week, hour and time.
• Key Lock: Sets with ON/OFF so that any key operation except the key lock OFF cannot
be performed.
• Remote Range: Sets with ON/OFF whether the Range Selection is made valid or invalid by
external input.
• Output Hold: Sets whether Calibration Output is held or not.
• Average Value Reset: Resets the average value.
• Response Speed: Sets the response time of electrical system.
• Average Time: Sets the moving average time.
• Maintenance mode: Enters passwords to switch to the Maintenance mode.
* For the maintenance mode, see Item 6.8.
1. To display the User mode, press the MODE key in the
measurement mode.
2. Point the cursor to “Parameter Setting” by pressing the or
key. Press the ENT key.
3. In the “Parameter Setting” screen that appears, point the
cursor to any item you want by pressing the or key. Press
the ENT key.
53 Model 7500 Instruction Manual
Teledyne Analytical Instruments
4. In the Parameter Setting screen that appears, enter the
numeric values and set the items. Entering the numeric
values or setting the items should be carried out by using the
or key. To move the cursor to the right, press the key.
After setting, press the ENT key, that the parameter setting is
carried out with the value you set.
To close Parameter Setting screen
To close the “Parameter Setting” screen or cancel this mode
midway, press the ESC key. A previous screen will return.
Setting Range
• Response time: 1 to 60 sec. (Initial value: 3 sec)
• Average time: 1 to 59 min or 1 to 4 hours (Initial
value: 1 hour)
When setting the unit of 1 to 59 minutes in terms of minute or 1 to 4 hours with hour
• Maintenance mode: 0000 to 9999 (Initial value: 0000)
Remote Range
A range can be switched via an external input by setting the Remote Range to ON. (The switching action
affects all of instantaneous value, O2 correction value, O2 correction average value and O2 average
value.) If the Remote Range is set to OFF, the external input becomes invalid.
Opening the input gives the High range, or short-circuiting the input gives the Low range.
For the terminal input, refer to 3.4, Wiring.
Switching the range cannot be performed by on-screen operation when the REMOTE RANGE is set to
ON.
Note: In case of 1 range system, this function is overridden.
Output Hold
By setting an output hold to ON, an output signal of each channel are held during the calibration (manual
calibration and auto calibration) and for the gas ow time (refer to 6.4, Setting of Auto Calibration).
Regardless of Hold ON/OFF setting, an output signal can be held via an external input.
(1) Manual calibration
54 Model 7500 Instruction Manual
(2) Auto calibration
(3) External hold
(4) Screen display during holding
The “Holding” message blinks on the measuring screen.
Teledyne Analytical Instruments
Since the screen displays the process of calibration is displayed during the manual calibration, “Holding”
is not displayed even if the screen is held, but the screen is displayed with the hold extending time.
(5) If calibration is cancelled after the calibration gas is supplied regardless of during manual calibration
or auto calibration, an output hold of the holding extending time will be performed.
Average value reset
This mode is used to clear O2 correction average value and O2 average value, and restarts averaging. All
average values are reset at a time. The indication value and output value is 0 ppm, vol% or so at the time
of the reset input.
So long as short-circuited, resetting lasts.
At the edge of changing from short circuit to opening, the
average action restarts.
Response time
The response time of the electrical system can be changed.
Setting is available by components.
Note: It does not provide exact seconds for the setting time,
but it gives a guide of the setting time. The setting value can be
modied as requested by the customer.
55 Model 7500 Instruction Manual
Average period
It allows you to set an average period of the average value of
O2 correction.
It enables you to set an average time of 1 to 59 minutes (1minute step) or 1 to 4 hours (1-hour step).
Changing the setting resets the average value of O2
correction and O2 average value. (Pressing the ENT
validates the resetting only for components whose setting
was changed.)
Example of average action
Suppose the average period is 1 hour.
Teledyne Analytical Instruments
• Sampling occurs every 30 seconds
• Every 30 seconds, the average for last 1 hour (time setting) is output.
• At the instant of resetting, zero is assumed for all past values. It means the average value will not be
correct for 1 hour after resetting.
Maintenance mode
To open the maintenance mode, enter a password. After entering the password, press the ENT key.
The password can be used for the Password Setting in the Maintenance mode. A password is set to
“0000” before factory-shipment. This value is available for the Maintenance mode.
56 Model 7500 Instruction Manual
6.8 Maintenance mode
This mode is used for check of sensor input values,
display of error log les or setting of passwords.
First, enter a password and then use it from the next
operation. This mode is displayed by selecting the
Maintenance Mode from “6.7 Parameter Setting”
1. Select the Maintenance mode from the Parameter
Setting screen to display the Password Setting screen.
2. Enter the password, and the Maintenance Mode item
selection screen will be displayed. Point the cursor to the
item you want by pressing the or key and press the ENT
key.
3. Next, each Maintenance screen is displayed.
Note: “To Factory Mode” is used for our service
engineers only. Refrain from using this mode.
Teledyne Analytical Instruments
• Sensor Input Value screen
Description of Sensor Input Value screen
• CO2: CO2 sensor input value
• CO: CO sensor input value
• O2: O2 sensor input value
• Temperature : Temperature sensor input value
• Error Log screen
Description of Error Log screen
Error history
For error number, date and time (days, period) of
occurrence, channel and other details of error, refer to
“8.1 Error message”.
57 Model 7500 Instruction Manual
• O2 correction reference value setting screen
Teledyne Analytical Instruments
• Password Setting screen
Description of Password Setting screen
It enables you to set a password to be used when switching the
parameter setting mode to the maintenance mode.
Note: The password set herein must be managed for safety. Failure
to enter the correct password will not open the Maintenance mode.
• Station No. setting screen (option)
Setting range
• Station No.: 00 to 31 (Initial No.: 00)
* Please refer to another manual (INZ-TN513327-E) about the
communication function.
58 Model 7500 Instruction Manual
6.9 Calibration
6.9.1 Zero calibration
It is used for zero point adjustment. For zero calibration
gas, see 3.3 (3), Preparation for standard gas in
Sampling. Use a gas according to application.
1. Press the ZERO key on the Measurement screen to
display the Manual Zero Calibration screen.
2. Select the CH (component) to be calibrated by
pressing the UP or DOWN key. After selection, press the
ENT key, and zero gas will be supplied.
CAUTION
For the CH (components) that is set to “at once” in the
“Zero Calibration” of the Calibration Setting mode, zero
calibration is also carried out at the same time.
Teledyne Analytical Instruments
3. Wait until the indication is stabilized with the zero gas
supplied. After the indication has been stabilized, press
the ENT key. Zero calibration in Range selected by the
cursor is carried out.
To close Zero Calibration
To close the “Zero Calibration “ or cancel this mode
midway, press the ESC key. A previous screen will
return.
59 Model 7500 Instruction Manual
6.9.2 Span calibration
It is used to perform a span point adjustment. Supply
calibration gas with concentration set to the span value
to perform the span calibration. For the span calibration
gas for the SO2, CO2, CO, H4 measurement, use the
standard gas with a concentration of 90% or more of
the range value. For the calibration gas for the O2
measurement, use the standard gas of about 2 vol%.
1. Press the SPAN key on the Measurement screen to
display the Manual Span Calibration screen.
2. Press the UP or DOWN key to select CH (component)
to be calibrated. After selection, press the ENT key, and
the span calibration contact output on corresponding to
CH is turned ON. And supply span gas.
CAUTION
Teledyne Analytical Instruments
When Range Interlock from “Calibration Range” of
the Calibration Setting mode is set, span calibration is
performed together with 2 Ranges.
3. Wait until the indication is stabilized in the state where
the calibration gas is supplied. After the indication has
been stabilized, press the ENT key. Span calibration of
Range selected by the cursor is performed.
To close Span Calibration
To close the “ Span Calibration “ or cancel this mode
midway, press the ESC key. A previous screen will
return.
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7. MAINTENANCE
7.1 Daily check
(1) Zero calibration and span calibration
1. It is used for zero point adjustment. For calibration, refer to 6.9.1, Zero calibration.
2. After zero calibration, perform span calibration. For calibration, refer to 6.9.2, Span calibration.
3. Zero calibration and span calibration should be performed once a week, if required.
(2) Flow check
1. Sampling gas ow rate and purge gas ow rate should be as follows;
Sampling gas ow rate: 1.0 L / min ±0.5 L / min (stable)
Purge gas ow rate: About 1L / min
2. Maintenance and check should be carried out every day, if required.
7.2 Daily check and maintenance procedures
Table 7-1 Maintenance and check list
Parts to be checked Phenomena Cause Remedy
Every day Recorder indication Lower indication 1. Dust is mixed in
the sample cell
2. Air is sucked in
anywhere in the
sampling tube
Check for purge gas
ow if purging the
sampling gas ow
instrument
Replacement
of Monitor lter
(membrane lter)
Every week Zero point of gas
analyzer
Span point of gas
analyzer
Replacement
of monitor lter
(membrane lter)
Every year Gas analyzer Irrespective of
Standard ow rate
is 1L / min. It is not
within the range of
the specied ow
rate of 0.5 to 1.5 L /
min.
Much clogged Primary lter is
damaged
Out of zero point Zero calibration
Out of the standard
point
Irrespective of
phenomena
phenomena
1. Clean sampling
cell and check for
sampling device,
especially gas lter
2. Check for leak of
the sampling line
and repair if required
Adjust the ow
rate with ow rater
needle valve
1. Replace primary
lter
2. Replace lter
(paper)
Span calibration
Replace lter
(paper)
Overhaul
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7.3 Cleaning of measuring cell
Entry of dust or water drops in the measuring cell contaminates the interior of the cell, thus resulting in
a drift. Clean the inside if dirty. Then, check the sampling device, especially the lter, to prevent the cell
from being contaminated by dust or mist.
7.3.1 Disassembly and assembly of measuring cell
There are two kinds of measuring cells, on block cells (cell length: 4 mm, 8 mm, 16 mm, 32 mm) and pipe
cells (Cell length: 6.4 mm, 125 mm and 250 mm). 2-component analyzer may incorporate both measuring
cells in optical unit. In such a case, detach the pipe cell and then block cell (See Fig. 7-1).
(1) How to remove pipe cell (See Fig. 7-1)
1. Stop measured gas. If it is harmful, purge in the measuring cell thoroughly with zero gas.
2. Turn OFF the power switch.
3. Detach the top cover.
4. Remove the pipe connected to the measuring cell.
5. Slide the infrared ray light source unit (No. 5) toward the front panel by loosening the screw
(No. 1) fastened to the base plate to provide clearance between the pipe cell (No. 12)
and light source unit.
6. Loosen and remove a screw (No. 7) from the cell retainer (No. 11) fastening the pipe cell.
7. Remove the cell from the measuring unit and unscrew the infrared transmission window
(No. 14) at the both ends in the right direction.
Note: The reection plate in the cell is not closely attached to the cell.
8. For assembly, reverse the disassembly procedure. Provide 0.5 mm clearance between the
infrared ray light source unit and cell, and the cell and detector, respectively.
62 Model 7500 Instruction Manual
Teledyne Analytical Instruments
Number Name
1 Screw (for xing light source unit)
2 Screw (for xing detector)
3 Screw (for xing base plate)
4 Base plate
5 Light source unit
6 Screw (for xing support)
7 Screw (for xing cell retainer)
8 Chopper motor connector
(9) Filter
10 Support
11 Cell retainer
12 Pipe cell
13 O-ring
14 Infrared transmission window
15 Detector
16 Bridge PCB
17 Bridge resistance
(18) Detector: Installed in 2-component analyzer only
Fig. 7-1 Conguration of measuring unit (pipe cell)
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(2) How to remove block cell (See Fig. 7-2)
1. For Step 1 to 4, see Item 7.3.1, (1) How to remove pipe cell.
5. Remove the connector to the detector output cord from the printed board. For the 2-component
analyzer, remove the output cord connector of the 2-component analyzer detector (No. 13)
from the printed board, and then remove the 2-component detector by unscrewing two mounting
screws (No. 14) fastening the 2-component detector.
6. Unscrew the two screws (No. 10) that hold the detector to the infrared ray light source unit to
remove the detector from the measuring unit. The cell can be removed together with the detector.
7. To remove the cell, unscrew the two screws (No. 6) holding the cell to the detector. The infrared
transmission window is just sandwiched (not xed) between the detector and block cell. Keep the
detector facing up, when removing this window.
8. For assembly, reverse the disassembly procedures.
Note: The O-ring is placed between the window holder and cell. Take care about the O-ring position. With
2-component analyzer, install 2-component detector last. Take care so that no space is left between the
1-component and 2-component detectors. When inserting the detector output cord connector into the
printed board, plug the connectors for 1-component detector and 2-component detector into position. The
1-component connector should be plugged into CN11 and 2-component connector into CN1, respectively.
64 Model 7500 Instruction Manual
Teledyne Analytical Instruments
Number Name
1 Screw (for xing light source unit)
(2) Filter
3 Screw (for xing detector)
4 Base plate
5 Light source unit
6 Screw (for xing block cell)
7 Block cell
8 Infrared transmission window (window holder)
9 O-Ring
10 Screw (for xing base plate)
11 Chopper motors connector
12 Detector
(13) Detector: Install in the 2-component analyzer
(14) Screws (for mounting the 2-component detector)
Fig. 7-2 Conguration of measuring unit (block cell)
65 Model 7500 Instruction Manual
Teledyne Analytical Instruments
3) How to remove measuring unit (See Fig. 7-3)
1. For Step 1 to 4, see Item 7.3.1(1), How to remove pipe cell.
2. Remove the detector output cord connector from the printed board.
3. Remove wiring to the 2-pin terminals of the infrared ray light source assembly and chopper
motor pin connector (No. 8) from the printed board.
4. Detach the 4 screws (No. 3) fastening the base plate (No. 4) to remove the measuring unit.
Note: Special care should be taken when assembling or disassembling the measuring cell to avoid the
application of force to the detector pipe or infrared ray light source unit pipe. If the pipe is deformed or
damaged by excessive force, there is a danger of gas leak, thus resulting in misoperation.
Number Name
1 Screw (for xing light source)
2 Screw (for xing detector)
3 Base plate
4 Light source unit
5 Screw (for xing block cell)
6 Block cell
7 Infrared transmission window
8 O-ring
9 Detector
10 Screw (for xing base plate)
11 Support
12 Screw (for xing cell retainer)
13 Cell retainer
14 Pipe cell
15 O-ring
16 Infrared transmission window
17 Screw (xing detector)
18 Detector
Fig. 7-3 Conguration of measuring unit (2-component analyzer: block cell + pipe cell)
66 Model 7500 Instruction Manual
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7.3.2 How to clean cell
1. To clean the cell inside or infrared ray transmission window, rst clear large dirt of it with a soft
brush and then wipe with soft cloth lightly.
Donʼt use hard cloth.
Note: Handle the fragile window with care. Use care not to rub off the dirt from the window roughly.
2. If the window or the cell interior is very dirty, use a soft cloth moistened with absolute alcohol.
3. If the window is corroded, rub off the scale from the window lightly with a soft cloth to which
chrome oxide powder is applied. If it is excessively corroded, it should be replaced with
new one.
4. When cell or window cleaning is completed, assemble according to the cell disassembly and
assembly procedures. Especially, the pipe should be closely connected without gas leak,
and repair if the pipe is bent.
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8. TROUBLESHOOTING
8.1 Error message
If errors occur, the following contents are displayed.
Error display Error contents Probable causes
Error No. 1 Sector motor rotation detector signal is faulty. • Infrared ray light source is faulty.
• Sector motor rotation is faulty or stopped.
• Motor rotation detector circuit is faulty.
• Amplier circuit is faulty.
Error No. 3 A/D conversion signal is faulty. • Circuit is faulty.
Error No. 4 Zero calibration is not within the allowable
range.
Error No. 5 A amount of zero calibration (indication value) is
over 50% of full scale.
Error No. 6 Span calibration is not within the allowable
range.
Error No. 7 A amount of span calibration (difference
between indication value and calibrated
concentration value) is over 50% of full scale.
Error No. 8 Measured values uctuate to much during zero
and span calibration.
Error No. 9 Calibration is abnormal during auto calibration. • Error corresponding to No. 4 to No. 8 occurred
Error No. 10 Output cable connection is improper. • Wiring is detached between analyzer and
• Zero gas is not supplied.
• Zero point is deected much due to a dirty cell.
• Detector is faulty.
• Span gas is not supplied.
• Calibrated concentration setting does not
match cylinder concentration.
• Zero calibration is not performed properly.
• Span is deected much due to dirty cell.
• Detector sensitivity is deteriorated.
• Calibration gas is not supplied.
• Time for supplying calibration gas is not short.
during auto calibration.
interface module.
• Wiring is disconnected between analyzer and
interface module.
Note: When errors No. 1, No. 3 and No. 10 occur, instrument error output contacts are conductive.
When errors No. 4 to No. 9 occur, calibration error output contacts are conductive.
Screen display and operation at the occurrence of error.
In case of Error No. 1 to No. 4, No. 6, No. 8 to No. 10
68 Model 7500 Instruction Manual
In case of Error No. 5 and No. 7
Teledyne Analytical Instruments
(2) Error log le
If error occurs, the history is saved in an error log le. The error log le exists in the maintenance mode.
* Up to 14 errors can be saved in the error history; the oldest error will be deleted one by one every time
a new occurs.
* If the power display supply is turned OFF, the contents in the error log le will not be lost or damaged.
Deletion of error history
Press the ENT key on the above screen, and the “Error Log Clear” will be inverted. Further pressing the
key will clear the error history.
69 Model 7500 Instruction Manual
Teledyne Analytical Instruments
9. SPECIFICATIONS
9.1 Specications
(1) Standard specications
Principle of measurement:
CO2, CO, CH4, SO2; Non-dispersion infrared-ray
absorption method; Single light source and single beam
(single beam system)
O2: Paramagnetic method (O2 sensor built in) or
zirconia sensor method (O2 sensor externally installed)
Measurable gas components and measuring range:
Minimum range Maximum
range
CO2 0 to 500 ppm 0 to 100 vol%
CO 0 to 200 ppm 0 to 100 vol%
CH4 0 to 1000 ppm 0 to 100 vol%
SO2 0 to 1000 ppm 0 to 5000 ppm
O2 (built in) 0 to 5 vol% 0 to 100 vol%
O2 (external
zirconia)
• Max. 4 components measurement including O2.
• 1 or 2 measuring range per component.
• Measuring range ratio ≤ 1:5 (except built in O2) ≤ 1:20
(built in O2)
Max. 4 components and 2 ranges are selectable including
an O2 measurement. For measurable components and
possible combinations of measuring ranges, refer to
Tables 1 to 6.
Measured value indication:
Digital indication in 4 digits (LCD with back light)
• Instantaneous value of each component
• Instantaneous value after O2 correction (only in CO,
SO2 measurement with O2)
• Average value after O2 correction (only in CO, SO2
measurement with O2)
• O2 average value
Analog output signals:
4 to 20mA DC or 0 to 1V DC, non-isolated output. Analog
output corresponds to measured value indication in 1:1.
Permissible load; 550Ω max. for 4 to 20 mA DC100kΩ
min. for 0 to 1V DC
* Refer to Table 6, for the channel No. of displayed values
and analog output signals.
Analog input signal:
For signal input from externally installed O2 sensor.
Signal requirement; (1) Signal from Teledyneʼs Zirconia
O2 sensor (TYPE: ZFK7) (2) 0 to 1V DC from an O2
sensor Input section is not isolated. This feature is
effective when an O2 sensor is not built in.
0 to 5 vol% 0 to 25 vol%
Relay contact output:
1a contact (250V AC/2A, resistive load) Instrument error,
calibration error, range discrimination, auto calibration
status, solenoid valve drive for auto calibration, pump
ON/OFF.
1c contact (250V AC/2A, resistive load) Upper/lower
alarm contact output. Peak count alarm contact output.
* All relay contacts are isolated mutually and from the
internal circuit.
Contact input:
Non-voltage contact (ON/0V, OFF/5V DC, 5mA owing at
ON); Remote range changeover, auto calibration remote
start, remote holding, average value resetting; Isolated
from the internal circuit with a photocoupler. Contact
inputs are not isolated from one another.
*Only M3.5 screw terminals are used for all signal inputs
and outputs.
Power supply:
Rated voltage: 100V to 240V AC
Operating voltage: 85V to 264V AC
Rated frequency: 50/60 Hz
Power consumption: 70 VA max.
Power inlet: Conformity to EN60320 Class I type
Operation conditions:
Ambient temperature: -5°C to 45°C
Ambient humidity: 90% RH max.
Storage conditions:
Ambient temperature: -20°C to 60°C
Ambient humidity: 100% RH max.noncondensing
Dimensions (H x W x D):
19-inch rack mounting type: 177 x 483 x 493mm
Desk-top type: 194 x 483 x 493mm
Mass: Approx. 10 kg
Finish color:
Front panel; Off-white (Munsell 10Y7.5 / 0.5 or equivalent)
Casing: Steel-blue
Enclosure: Steel casing, for indoor use
Material of gas-contacting parts:
Gas inlet/outlet; SUS304
Sample cell; SUS304/neoprene rubber
Infrared-ray transmitting window; CaF2
Internal tubing; Toaron tube
Gas inlet/outlet:
Rc1/4 or NPT1/4 internal thread
Purge gas ow rate:
1 L / min (when required)
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Teledyne Analytical Instruments
(2) Standard functions
Output signal holding:
Output signals are held during manual and auto
calibrations by activation of holding (turning on its
setting). The values to be held are the ones just before
start calibration mode. Indication values will not be held.
Remote output holding:
Output signal is held at the latest value by short-circuiting
the remote output holding input terminals. Holding
is maintained while the terminals are short-circuited.
Indication values will not be held.
Remote range changeover:
Measuring range can be changed according to an
external signal when remote range changeover input
is received. Changeover is effective only when remote
range setting is turned on. In this case, measuring range
cannot be changed manually.
When the contact input terminals for each component
are short-circuited, the rst range is selected, and it is
changed over to the second range when the terminals are
open.
Range identication signal:
The present measuring range is identied by a contact
signal. The contact output terminals for each component
are short-circuited when the rst range is selected, and
when the second range is selected, the terminals are
open.
Auto zero calibration:
Auto zero calibration is carried out periodically at
the preset cycle. This cycle is independent on “Auto
calibration” cycle.
When zero calibration gas and solenoid valve for
opening/closing the calibration gas ow line are prepared
externally by the customer, zero calibration will be carried
out with the solenoid valve drive contact for zero
calibration turned on/off at the set auto zero calibration
timing.
Auto zero calibration cycle setting:
Auto zero calibration cycle is set. Setting is variable
within 1 to 99 hours (in increments of 1 hour) or setting is
variable within 1 to 40 days (in increments of 1 day).
Gas ow time setting:
The timing for owing zero gas in auto zero calibration
is set. Settable 60 to 599 seconds (in increments of 1
second)
Upper/lower limit alarm:
Alarm contact output turns on when the preset upper or
lower limit alarm value is reached.
Contacts close when the instantaneous value of each
component becomes larger than the upper alarm limit
value or smaller than the lower alarm limit value.
Instrument error contact output:
Contacts close at occurrence of analyzer error No. 1, 3 or
10.
Auto calibration:
Auto calibration is carried out periodically at the preset
cycle. When a standard gas cylinder for calibration and
a solenoid valve for opening/closing the gas ow line are
prepared externally by the customer, calibration will be
carried out with the solenoid valve drive contacts for
zero calibration and each span calibration turned on/off
sequentially at the set auto calibration timing.
Auto calibration cycle setting:
Auto calibration cycle is set. Setting is variable within 1
to 99 hours (in increments of 1 hour) or 1 to 40 days (in
increments of 1 day).
Gas ow time setting:
The time for owing each calibration gas in auto
calibration is set. Settable within 60 to 599 seconds (in
increments of 1 second)
Auto calibration remote start:
Auto calibration is carried out only once according to an
external input signal. Calibration sequence is settable in
the same way as the cyclic auto calibration. Calibration
starts when a non-voltage rectangular wave is applied to
the auto calibration remote start input terminals (opened
after short-circuiting for 1.5 seconds or longer). Auto
calibration is started when the contacts open.
Calibration error contact output:
Contacts close at occurrence of manual or auto
calibration error (any of errors No. 4 to 9).
Auto calibration status contact outputs:
Contacts close during auto calibration.
Pump ON/OFF contact output:
During measurement, this contact close. While calibration
gas is owing, this contact open. This contact is
connected in power supply of pump, and stop the sample
gas while calibration gas owing.
(3) Optional functions
O2 correction:
Conversion of measured CO and SO2 gas concentrations
into values at standard O2 concentration
21-On
Correction formula: C = ––––––––- x Cs
21-Os
C: Sample gas concentration after O2 correction
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Teledyne Analytical Instruments
CS: measured concentration of sample gas
Os : Measured O2 concentration
On: Standard O2 concentration (value changeable by
setting)
*The upper limit value of the fractional part in this
calculation is 4. The result of calculation is indicated and
output in an analog output signal.
Average value after O2 correction and O2 average
value calculation:
The result of O2 correction or instantaneous O2 value
can be output as an average value in the determined
period of time. Used for averaging is the moving average
method in which sampling is carried out at intervals of 30
seconds.
(Output is updated every 30 seconds. It is the average
value in the determined period of time just before the
latest updating.) Averaging time is settable within 1 to 59
minutes (in increments of 1 minute) or 1 to 4 hours (in
increments of 1 hour).
Average value resetting:
The above-mentioned output of average value is started
from the initial state by applying a non-voltage rectangular
wave to the average value resetting input terminals
(opened after short-circuiting for 1.5 seconds or longer).
Output is reset by short-circuiting and restarted by
opening.
CO concentration peak count alarm:
(added only for CO/O2 measurement) Alarm output turns
on according to the preset concentration and count.
Whenever the instantaneous value of CO exceeds the
preset concentration value, count increments. If the count
exceeds the preset value in one hour, the alarm contacts
close.
Communication function:
RS-232C (9pins D-sub)
Half-duplex bit serial
Start-stop synchronization
ModbusTM protocol
Contents: Read/Write parameters; Read measurement
concentration and instrument status.
Remark : When connecting via RS-485 interface, an RS232C / RS-485 converter should be used.
(4) Applicable standards
Product safety: EN61010-1 :2001
EMC: EN61326-1 :1997, A1 :1998, A2 :2001
(5) Performance
Repeatability: ±0.5% of full scale
Linearity: ±1% of full scale
Zero drift: ±2% of full scale/week
Span drift: ±2% of full scale/week
Response time: (for 90% FS response, including
replacement time of sample gas)
1 or 2 component measurement: Within 15 seconds
3 or 4 component measurement : Within 30 seconds
Interference from other gases:
Interference
component
CO 1000
ppm
CO2 15% ≤1% FS (for
H2O saturation at 20°C
H2O satura-
tion at 2°C
CO2
analyzer
≤1%
FS
≤1% FS≤1% FS (for
CO
analyzer
200 ppm
analyzer,
≤2.5% FS)
200 ppm
analyzer,
≤2.5% FS)
≤2.5% FS
(for 200
ppm analyzer)
CH4
analyzer
≤1% FS≤1%
≤1% FS≤1% FS≤2%
≤1%
FS
SO2
analyzer
FS
≤5%
FS
O2
analyzer
FS
(6) Standard Requirements for Sample Gas
Flow rate: 1L / min ±0.5L / min
Temperature: 0 to 50°C
Pressure: 10 kPa or less (Gas outlet side should
be open to the atmospheric air.)
Dust: 100 µg/Nm3 in particle size of 0.3 µm or less
Mist: Unallowable
Moisture: Below a level where saturation occurs
at room temperature (condensation unallowable). Below
a level to cause saturation at 2°C for CO measurement
with 0 to 200 ppm range and SO2 measurement.
Corrosive component: HCl 1 ppm or less
Standard gas for calibration:
Zero gas; Dry N2
Span gas; Each sample gas having concentration 90
to 100% of its measuring range (recommended). Gas
beyond concentration 100% is unusable.
In case a zirconia O2 analyzer is installed externally
and calibration is carried out on the same calibration gas
line:
Zero gas; Dry air or atmospheric air
Span gas; For other than O2 measurement, each
sample gas having concentration 90 to 100% of its
measuring range. For O2 measurement, O2 gas of 1 to 2
vol%.
(7) Installation conditions
Use this instrument indoors.
(Select a place where the equipment does not receive
direct sunshine, draft/rain or radiation from hot
substances. If such a place cannot be found, a roof or
cover should be prepared for protection. )
A vibration-free place.
A place which is clean around the analyzer.
72 Model 7500 Instruction Manual
9.2 Code symbols
Teledyne Analytical Instruments
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Teledyne Analytical Instruments
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Teledyne Analytical Instruments
<Code specication for ordering>
(1) Code symbols should be specied.
(2) Range combination should be the one allowed in separate tables.
(note 1) “Y” should be specied when only O2 measurement is necessary.
(note 2) External O2 sensor signal should be 0-1VDC linear of full scale, when “ B ” is specied at
the 6th digit.
(note 3) “C” should be specied when “ Y ” is specied at the 5th digit.
(note 4) Allowable combinations of ranges are specied in the Table 1 to 6 in page 9-7 and 9-8.
(note 5) Allowed only for CO analyzer.
(note 6) Allowed only for CO and CO2 analyzers.
(note 7) O2 correction is carried out for CO and SO2. At the same time, average value output
after O2 correction and O2 average value output are added. Peak count alarm is carried out for CO.
(note 8) “Y” should be specied when without O2 measurement (when 6th digit is Y).
(note 9) A gas composition table should be issued.
(note 10) Rated voltage of supplied power cable and plug conguration differ when “E” and “U” are
specied at the 10th digit. Select one from three power voltages. Plug conguration is North America type
when specifying “E”, and European type when specifying “U”.
75 Model 7500 Instruction Manual
Teledyne Analytical Instruments
Measurable component and range - availability check table -
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Teledyne Analytical Instruments
Table 5: Triple component analyzer (CO2, CO, CH4)
Covered in combination of Table 2, Table 3 and Table 4.
77 Model 7500 Instruction Manual
9.3 Outline diagram
(1) Main unit
Teledyne Analytical Instruments
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Teledyne Analytical Instruments
(2) Accessory slide rail (unit: mm)
* The slide rails are attached to this equipment when designated.
Model : 305A-20/Accuride International Inc.
19-inch rack mounting method:
The mass of the instrument should be supported at the bottom of the unit (or the side of the unit when
mounted with the slide rails).
Also, for facilitate maintenance, a structure which allows extraction of the main unit by using the slide rail
is recommended.
79 Model 7500 Instruction Manual
Appendix
Drawing List
D79104 Outline diagra
Teledyne Analytical Instruments
m
80 Model 7500 Instruction Manual
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