Teledyne Analytical Instruments
QUICKSTART GUIDE
MODEL 7500
Infrared Gas Analyzer
Quickstart Guide Infrared Gas Analyzer
Teledyne Analytical Instruments
Model 7500 Quickstart Guide
Teledyne Analytical Instruments 1
GETTING STARTED
This Quickstart Guide is designed to get you set up and operating your Teledyne Analytical
Instruments Analyzer quickly. It shortcuts the details so you can install and use your new
analyzer with a minimum of fuss. This Quickstart Guide should be used in conjunction with the
Instruction Manual that shipped with your instrument. Only necessary features to get you
operational are discussed in this guide. Many of the advanced features of this analyzer are not
described here so you should refer to the Instruction Manual to get the most from your analyzer.
The Model 7500 infrared gas analyzer measures the concentrations of CO
2
, CO, CH
4
, SO
2
,
and O
2
contained in a sample gas. CO
2
, CO, CH
4
, and SO
2
are measured by non-dispersion
infrared method, while O
2
is measured using a paramagnetic oxygen sensor or an external
zirconia O
2
sensor.. A maximum of 4 components including O
2
(a maximum of 3 components
for other than O
2
measurement) are simultaneously measurable.
Front Panel (Operator Interface)
Take a minute to familiarize yourself with the analyzer’s interface. The standard 7500
Infrared Gas Analyzer is housed in a rugged case with controls and display accessible from the
front panel. The operator interface consists of eight buttons for operating the analyzer, a display
screen, plus power and back light switches.
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Control Keys:
Name
Description
Name
Description
MODE key
Used to switch the mode.
ESC key
Used to return to a previous screen
or cancel the setting midway.
SIDE key
Used to change the selected
item (by moving the cursor) and
numeral digit.
ENT key
Used for confirmation of selected
items or values, and for execution
of calibration.
UP key
Used to change the selected
item (by moving the cursor) and
to increase numeral value.
ZERO key
Used for zero calibration.
DOWN key
Used to change the selected
item (by moving the cursor) and
to decrease numeral value.
SPAN key
Used for span calibration.
Rear Panel
At the rear panel you make the gas and electrical connections to the instrument.
• Power Connection: Port for connecting power cable.
• Gas Connections: One inlet, exhaust out plus purge inlet.
• RS-232 Port : Digital port for standard DB-9 type cable
• Terminal Blocks 1 - 5: Interconnections for analyzer functions including:
• Analog outputs
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• Alarm connections
• Calibration contacts
• Range ID contacts
• Remote range change signals
• Auto calibration signals
• External O2 sensor input
• Error signals
• Pump control
Refer to the Instruction manual that shipped with your instrument for a complete list of
output signal connections.
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SETUP AND INSTALL
Mount the Analyzer
The Model 7500 is for indoor use in a general purpose area. It is NOT for hazardous
environments of any type.
For installation, select an indoor location that is vibration-free, clean, and close to an AC
power source (100-265 VAC 50/60 Hz). The instrument is designed to be either slide rail or
guide rail mounted as shown below.
Whichever mounting method is chosen, make sure there is sufficient access room on top of
the analyzer to be able to remove the top cover and perform instrument maintenance.
Gas Connections
Note: Read all cautions contained in the Instruction manual before installing sample
system.
You will need the following calibration gases:
• Zero gas: N
2
(CO
2
, CO, CH
4
, SO
2
and built-in paramagnetic O
2
sensor).
• Purge gas (N
2
or other inert gas)
• Span gas: 90% of full scale of component for analysis.
• Span gas: for built-in paramagnetic O
2
sensor — 90% of full scale of O
2
.
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If using an external zirconia O
2
sensor, you will need:
• Zero gas — dry air or air
• Span gas — 1-2% O
2
The analyzer is designed for 1/4 inch tubing. Installed fittings are 1/4” NPT. A typical
piping diagram is shown below. This diagram shows calibration gases directed to the analyzer
through solenoid valves which are controlled by the analyzer.
1. Connect the sample gas to the SAMPLE IN port.
2. Connect a vent line to SAMPLE OUT port. Exhaust to atmospheric pressure.
3. Calibration gases should be tee'd into the sample inlet with appropriate valves. (See
piping diagram).
4. Regulate the sample gas pressure to keep the sample flow around 1 ±0.5 lpm (liter
per minute).
5. Use short tubing with minimum bends for improved response time.
6. If required, connect a purge gas to the purge inlet. Use a purge flowrate of 1 lpm.
Note: Exhaust connections must be consistent with the hazard level of the constituent
gases. Check Local, State, and Federal laws, and ensure that the exhaust
stream vents to an appropriately controlled area, if required.
See sections 3.3 and 3.4 in the Instruction Manual for additional details regarding sample
systems.
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Electrical Connections
CAUTION: READ ALL SAFETY INFORMATION REGARDING ELECTRICAL HAZARDS
ASSOCIATIED WITH THIS INSTRUMENT BEFORE MAKING ELECTRICAL
CONNECTIONS.
All electrical connections are made at the rear panel.
Main Power:
• Connect primary input power cord.
Insert the power cord into the power cord receptacle.
Terminal Block 1:
• Connect analog output signals (4 to 20 maDC or 0 to 1
VDC ) at Terminal Block 1 (1 to 10, 15 to 20). Each
channel has its own output signal.
Terminal Block 2:
• If using an external O
2
sensor, connect the O
2
sensor
input to Terminal Block 2 (1 – 2) .
Note: There are no terminals for the built-in O
2
sensor. It is
prewired internally at the factory.
• If used, connect input signal for remote range changing
at Terminal Block 2 position 13 to 20 as shown in the
figure.
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Terminal Block 3:
• Connect Remote Hold, Average Value Reset, and
Auto Calibration Remote Start contact inputs to
Terminal Block 3 as shown in the Figure.
• Connect failure alarm. Contact output is at Terminal
Block 3 (11, 12).
• Connect Range ID. Contact outputs for each channel
available at Terminal Block 3 (13 through 20).
Terminal Block 4:
• Connect span and zero calibration output signals at
Terminal Block 4 (1 through 10).
• Connect Auto Calibration Status Signal. Contact
output is available at Terminal Block 4 (13, 14).
• Connect Calibration Error Signal. Contact is available
at Terminal Block 4 (15, 16)
• Connect Pump ON/OFF signal. Output is available at
Terminal Block 4 (17, 18).
Terminal Block 5:
• Connect alarms. Alarm contacts are available for each
channel at Terminal Block 5 as shown in the figure.
Additional information regarding input and output signals
can be found in the instruction Manual in Section 3.5.
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BASIC OPERATION
Once the analyzer has been installed, it can be configured for your application. Prior to
using the instrument you must:
• Turn the power on and allow the analyzer to warm up.
• Select the range for analysis.
• Enter calibration parameters.
• Set alarm setpoints.
• Calibrate the instrument.
Additional configuration parameters are available to tailor the instrument to your particular
application. Refer to the Instruction Manual for specific information on setting of additional
system parameters.
Modes of Operation
There are three basic modes of operation, Measurement mode,
User mode and Calibration mode. Measurement mode is the default
mode and is where you view the concentration data, alarm
information and other data and messages relating to the analysis. The
measurement mode shown in the Figure to the right, displays up to 5
channels in a single screen. When viewing a channel beyond the 5
channels, press the UP or DOWN keys to scroll the screen one
channel at a time.
The User mode, is where you will setup the parameters for
analyzer. It is entered by pressing the MODE key which toggles
between Measurement and User modes. Note that in the User mode
screen, the upper left portion of the screen indicates the particular
screen you are viewing while the upper right portion prompts you for
the possible inputs within the screen.
The Calibration Mode is used for calibrating the analyzer. It is
entered by pressing either the ZERO or SPAN keys. This mode is used to set zero and span
calibration concentration, calibration range and auto-calibration details.
But before you can calibrate the analyzer there are some parameters to set up first, and these
are discussed below.
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Warm-Up Operation and Regular Operation
1. Turn ON the power switch at the left of the front panel. In a few moments, the
measurement screen will appear at the front panel.
2. Allow 2 hours for the instrument to warm-up.
Selecting the Analysis Range
Select the analysis range for each component.
1. Press the MODE key to display the User mode.
2. Point the cursor to “Changeover of Range” and press the
ENT key.
3. The “Channel Selection” screen appears. Press the UP or
DOWN key to select the desired CH (component). Then
press the ENT key.
4. At the next screen, select the range using the UP or
DOWN keys. (The range with a TRIANGLE mark is
currently selected.) After selection, press the ENT key.
Note: If Remote Range is set to ON, the a range change
cannot be performed on this screen. See the Instruction
Manual for information on remote range change.
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Calibration Settings
Set calibration concentration:
Here, you will set the concentration of the standard gas (zero and span) for each channel
that will be used in calibration.
1. Press the MODE key and toggle the display to the User
mode.
2. Use the UP or DOWN keys to point the cursor to
“Setting about Calibration”. Press the ENT key.
3. In the “Setting about Calibration” screen that appears,
move the cursor to “Calibration Value” using the UP or
DOWN key. Press the ENT key.
4. The next screen prompts you to select the channel you
want to set. Move the cursor to the channel (CH) you
want using the UP or DOWN key. Press the ENT key.
5. Select any concentration item you want to set using the
UP, DOWN, or SIDE key.
Note: Only instruments using the zirconia O
2
sensor can alter the zero setting.
6. Enter the calibration gas concentration values (zero and span) using the UP or
DOWN key to increase or decrease the displayed value. Move to the next digit by
pressing the SIDE key. When the correct calibration value is shown, save the
entry by pressing the ENT key.
7. To close the calibration concentration value setting process or abort the entry
midway, press the ESC key. A previous screen will return.
Manual zero individually or all at once:
Here you will set whether you want to zero calibrate all components at once or individually
channel by channel.
1. Press the MODE key and toggle the display to USER mode.
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2. Move the cursor to “Setting about Calibration” using the UP or DOWN key.
Press the ENT key.
3. In the next screen use the UP or DOWN key to move
to “About ZERO Calibration”. Press the ENT key.
4. In the next screen, point the cursor to CH you want to
set by using the UP or DOWN key. Press the ENT
key.
5. In the next screen, select “At once” or “Each” by
pressing the UP or DOWN key. Selecting “At once”
will allow the CH (components) to be zero-calibrated
at the same time. Selecting “Each” allows the CH
(components) to be individually zero-calibrated.
After setting, press the ENT key to save the
selections.
6. To close the calibration screen or abort the entry midway, press the ESC key. A
previous screen will return.
Set the Range to Calibrate on:
This mode is used to set the range for each CH (component) to calibrate on. You can
calibrate the component on a single range or both ranges.
1. Press the MODE key to display the User mode.
2. Move the cursor to “Setting about Calibration” using the UP or DOWN keys.
Press the ENT key.
3. In the next screen that appears, select “About Calibration Range” using the UP or
DOWN keys then press the ENT key.
4. In the next screen, select the CH you want to set by pressing the UP or DOWN
keys. Press the ENT key.
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 single range selected at the set
CH is calibrated.
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6. To close the calibration screen or abort midway, press ESC.
Enabling Auto Calibration:
Here you can set which components are automatically calibrated. It is assumed that for the
procedures listed in this Quickstart Guide, Auto Calibration is disabled and calibration is
performed manually. To make sure of the correct setting:
1. Press the MODE key to display the User mode.
2. Point the cursor to “Setting about Calibration” using the UP or DOWN key. Press
the ENT key.
3. In the “next screen, point the cursor to “Auto Calibration Components” using the
UP or DOWN key. Press the ENT key.
4. In the next screen, move the cursor to the CH you want to set using the UP or
DOWN key. Press the ENT key.
5. In the “Auto Calibration Selection” screen that appears,
select “enable” or “disable” by pressing the UP or
DOWN key. For the Quickstart procedure, make sure
all components are set to DISABLE. After setting,
press the ENT key. “Enable” will allow that channel to
be calibrated using the Auto Calibration feature.
6. To close the auto calibration screen or abort midway, press ESC to return to a
previous menu.
Note: Any component set to “enable” will be calibrated to zero at once at the time of
auto calibration regardless of setting chosen in “Manual Zero Individually or At
Once”.
To setup and use the Auto Calibration feature, refer to the Instruction manual shipped with
your instrument.
Setting Alarms
Prior to using the analyzer, you should set the alarm upper and lower limit values to provide
an alarm output during measurement.. High/low alarms are available for each channel. The
setting range is 0-100% full scale for each range.
1. Press the MODE key to display the User mode.
2. Point the cursor to “Alarm Setting” using the UP or DOWN key, then press the ENT
key.
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3. At the next screen, select the desired CH and press the
ENT key.
4. At the next screen, use the UP or DOWN keys until the
cursor is aligned with the alarm you want to set or adjust.
Then press the ENT key.
Note: Before changing the alarm setting, set the ON/OFF to
OFF
Note: Set the values so that upper limit value > lower limit
value and that (upper limit value - lower limit value) > hysteresis error. (Refer to
the Instruction Manual for setting or displaying the hysteresis error.)
5. Move the cursor to the item to adjust or set and use the UP or DOWN key to
increase or decrease the alarm setpoint value. Move to the next digit by pressing
the SIDE key. When the correct alarm setpoint is shown, save the entry by
pressing the ENT key.
Upper limit value: sets the upper limit value (concentration) of alarm.
Lower limit value: sets the lower limit value (concentration) of alarm.
ON/OFF: enables the alarm function when set to ON, or disables the
alarm function when set to OFF.
Note: 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 first.
6. Use the ESC key to leave the Alarm Setting screen and return to the previous screen.
Calibration
Zero Calibration:
1. Make sure an appropriate zero gas is properly connected to your analyzer. (Refer
back to Gas Connections if necessary).
2. Press the ZERO key to display the Manual Zero
Calibration screen.
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3. Select the CH (component) to be calibrated by pressing the UP or DOWN key. Then
press the ENT key to initiate zero gas flow to the analyzer.
Note: For all components that were set to “at once” in the “Zero Calibration setting”, the
zero calibration will be carried out simultaneously.
4. After the display has stabilized (this may take a few moments), press the ENT key.
Zero calibration in the range(s) indicated by the cursor will be performed.
5. To close the “Zero Calibration “ or cancel this mode midway, press the ESC key to
return to the previous screen.
Span Calibration:
1. For span calibrating the CO
2
, CO, CH
4
, SO
2
and built-in paramagnetic O
2
sensor
channels, use a standard gas with a concentration of 90% or more on the anticipated
range. For an external zirconia O
2
sensor, use a standard gas of about 2 vol%.
2. Press the SPAN key to display the Manual Span
Calibration screen.
3. Select the component to be calibrated by pressing the UP
or DOWN keys. Then press the ENT key to initiate span
gas flow to the analyzer..
Note: If the range to calibrate on has been set to “both”, span calibration is performed
together on the 2 Ranges.
4. After the display has stabilized (this may take a few moments), press the ENT key.
Span calibration on the component and range(s) indicated by the cursor will be
performed.
5. To close the “Span Calibration “or cancel this mode midway, press the ESC key to
return to the previous screen.
Measurement Mode
After calibration the Model 7500 will return to the
Measurement mode and the instrument is now ready for operation.
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