Teledyne Respiratory Product 3190Z User Manual

OPERATING INSTRUCTIONS FOR  
Model 3190Z  
Trace Oxygen Analyzer  
P/N M3190Z  
6/09/09  
DANGER  
Toxic gases and or flammable liquids may be present in this monitoring system.  
Personal protective equipment may be required when servicing this instrument.  
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.  
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Trace Oxygen Analyzer  
Safety Messages  
Your safety and the safety of others is very important. We have  
provided many important safety messages in this manual. Please read  
these messages carefully.  
A safety message alerts you to potential hazards that could hurt you  
or others. Each safety message is associated with a safety alert symbol.  
These symbols are found in the manual and inside the instrument. The  
definition of these symbols is described below:  
GENERAL WARNING/CAUTION: Refer to the instructions  
for details on the specific danger. These cautions warn of  
specific procedures which if not followed could cause bodily  
Injury and/or damage the instrument.  
CAUTION: HOT SURFACE WARNING: This warning is  
specific to heated components within the instrument. Failure  
to heed the warning could result in serious burns to skin and  
underlying tissue.  
WARNING: ELECTRICAL SHOCK HAZARD: Dangerous  
voltages appear within this instrument. This warning is  
specific to an electrical hazard existing at or nearby the  
component or procedure under discussion. Failure to heed this  
warning could result in injury and/or death from  
electrocution.  
Technician Symbol: All operations marked with this symbol  
are to be performed by qualified maintenance personnel only.  
NOTE: Additional information and comments regarding a  
specific component or procedure are highlighted in the form  
of a note.  
No  
Symbol  
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CAUTION:  
THE ANALYZER SHOULD ONLY BE USED FOR THE  
PURPOSE AND IN THE MANNER DESCRIBED IN  
THIS MANUAL.  
IF YOU USE THE ANALYZER IN A MANNER OTHER  
THAN THAT FOR WHICH IT WAS INTENDED,  
UNPREDICTABLE BEHAVIOR COULD RESULT  
POSSIBLY ACCOMPANIED WITH HAZARDOUS  
CONSEQUENCES.  
This manual provides information designed to guide you through  
the installation, calibration operation and maintenance of your new  
analyzer. Please read this manual and keep it available.  
Occasionally, some instruments are customized for a particular  
application or features and/or options added per customer requests.  
Please check the front of this manual for any additional information in  
the form of an Addendum which discusses specific information,  
procedures, cautions and warnings that may be peculiar to your  
instrument.  
Manuals do get lost. Additional manuals can be obtained from  
TI/AI at the address given in the Appendix. Some of our manuals are  
available in electronic form via the internet. Please visit our website at:  
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Table of Contents  
Safety Messages ..........................................................................iii  
Introduction ...................................................................................1  
1.1 Overview  
1
1
2
3
1.2 Main Features of the Analyzer  
1.3 Front Panel Description  
1.4 Rear Panel Description  
Operational Theory .......................................................................7  
2.1 Introduction  
7
7
2.2 Zirconium Oxide Sensors  
2.2.1 Principles of Operation  
2.2.2 The Effect of Pressure  
2.3 Electronics  
7
8
8
2.3.1 General  
8
2.3.2 Signal Processing  
3.1 Unpacking the Analyzer  
3.2 Location and Mounting  
3.2.1 Control Unit Installation  
3.2.2 External Probe Installation  
3.3 Electrical Connections  
3.4 Gas Connections  
9
11  
12  
12  
12  
12  
16  
16  
3.5 Installation Checklist  
Operation .....................................................................................17  
4.1 Introduction  
17  
18  
18  
19  
4.2 Using the Function and Data Entry Buttons  
4.3 Setting the Analysis Ranges  
4.3.1 HI Range  
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4.3.2 LO Range  
19  
4.4 Setting the Alarm Setpoints  
4.4.1 HI Alarm  
19  
19  
19  
20  
20  
20  
21  
4.4.2 LO Alarm  
4.4.3 Sensor Fail Alarm  
4.5 Selecting a Fixed Range or Autoranging  
4.6 Calibration  
4.7 LED Display on StartUp  
Maintenance ................................................................................ 23  
5.1 Replacing the Fuse  
5.1.1 AC Powered Units  
5.1.2 DC Powered Units  
5.2 Sensor Installation or Replacement  
5.2.1 When to Replace a Sensor  
A.1 Specifications  
23  
23  
24  
24  
24  
25  
26  
27  
A.2 Spare Parts List  
A.4 Miscellaneous  
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DANGER  
COMBUSTIBLE GAS USAGE  
WARNING  
This is a general purpose instrument designed for use in a  
non-hazardous area. It is the customer's responsibility to  
ensure safety especially when combustible gases are being  
analyzed since the potential of gas leaks always exist.  
The customer should ensure that the principles of operating  
this equipment are well understood by the user. Misuse of  
this product in any manner, tampering with its components,  
or unauthorized substitution of any component may  
adversely affect the safety of this instrument.  
Since the use of this instrument is beyond the control of  
Teledyne Instruments/ Analytical Instruments, referred as  
TI/AI, no responsibility by TI/AI, its affiliates, and agents for  
damage or injury from misuse or neglect of this equipment is  
implied or assumed.  
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Trace Oxygen Analyzer  
Introduction  
Introduction  
1.1 Overview  
The Teledyne Electronic Technologies Analytical Instruments  
(TETAI) Model 3190Z is a microprocessor-based trace oxygen analyzer  
for real-time measurement of trace amounts of oxygen in inert gases, or  
in a wide variety of gas mixtures. It features simple operation, fast  
response, and a compact, rugged construction.  
1.2 Main Features of the Analyzer  
The main features of the analyzer include:  
High resolution, accurate readings of oxygen content from 0-10  
parts per million (ppm) through 0-1,000 ppm. Large, bright,  
light-emitting-diode meter readout  
Simple pushbutton controls  
Advanced Zirconium Oxide measuring technology sensors  
Fast response and recovery time  
Microprocessor based electronics: 8-bit CMOS with on-board  
RAM and 16 KB ROM  
Two user selectable ranges (depending on sensor configuration)  
allow best match to user’s process and equipment  
Operator can select auto-ranging, allowing the analyzer to  
automatically select the proper preset range for a given  
measurement or lock the analyzer onto a single range  
Two concentration alarms with adjustable set-points  
Three analog outputs: two for measurement (0–10 VDC and  
negative ground 4–20 mADC) and one for range identification  
(0-10 VDC).  
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Introduction  
Model 3190Z  
Compact and rugged control unit with flush-panel case.  
Designed for indoor use. Front panel NEMA-4 rated.  
External probe  
1.3 Front Panel Description  
All controls and displays except the power switch are accessible  
from the front panel. See Figure 1-1. The front panel has seven  
pushbutton membrane switches, a digital meter, and an alarm indicator  
LED for operating the analyzer. These features are described briefly  
here and in greater detail in Chapter 4 - Operation.  
Figure 1-1: Front Panel  
Function Keys: Seven pushbutton membrane switches are used to select  
the function performed by the analyzer:  
Set HI Alarm Set the concentration ABOVE which an  
alarm activates.  
Set LO Alarm Set the concentration BELOW which  
an alarm activates.  
Set HI Range Set the high analysis range for the  
instrument (up to 0-1,000 ppm).  
Set LO Range Set the low analysis range for the  
instrument (down to 0-1,000 ppm).  
Span  
Span-calibrate the analyzer.  
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Trace Oxygen Analyzer  
Introduction  
Data Entry Keys: Two pushbutton membrane switches are used to  
manually change measurement parameters of the instrument as they are  
displayed on the LED meter readout:  
ƒ Up Arrow  
Increment values of parameters upwards  
as they are displayed on the LED readout.  
Down Arrow Increment values of parameters  
downwards as they are displayed on the  
LED readout.  
Digital LED Readout: The digital display is a LED device that  
produces large, bright, 7-segment numbers that are legible in any  
lighting environment. It has two functions:  
Meter Readout  
As the meter readout, it displays the  
oxygen concentration currently being  
measured.  
Measurement Parameters Readout  
It also displays user-definable alarm set-  
points, ranges, and span calibration point  
when they are being checked or changed.  
1.4 Rear Panel Description  
The rear panel contains the electrical input and output connectors.  
Separate rear panel illustrations are shown in Figure 1-2 for the AC and  
DC powered versions of the instrument. The connectors are described  
briefly here and in detail in the Chapter 3 - Installation.  
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Introduction  
Model 3190Z  
Figure 1-2 Rear Panel (AC and DC versions)  
ƒ
Power Connection  
AC version:  
100–240 VAC, 50/60 Hz. The  
connector housing includes the fuse  
holder and the power switch.  
DC version:  
Requires 10 - 36 VDC.  
Fuse Holder:  
Replacing the fuse is described in  
Chapter 5 - Maintenance.  
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Trace Oxygen Analyzer  
Introduction  
I/O Power Switch: Turns the  
instrument power ON (I) or OFF (O).  
Analog Outputs 0–10 VDC concentration output.  
0–10 VDC Range ID (or optional  
over-range) output.  
4–20 mADC concentration output,  
negative ground.  
Alarm  
Connections  
HI Alarm, LO Alarm, and Sensor  
Failure Alarm connections.  
RS-232 Port  
Serial digital output of concentration  
and range signals.  
External Probe Connects to the remote probe or  
remote analysis unit.  
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Operational Theory  
Operational Theory  
2.1 Introduction  
The analyzer is composed of three subsystems:  
1. Analysis unit with zirconium oxide sensor(s)  
2. Control unit with signal processing, display and controls  
3. Interface unit, supplying signals between 1 and 2.  
The analysis unit is designed to accept the sample gas and direct it  
to the sensitive surface of the zirconium oxide sensor.  
The control unit processes the sensor output and translates it into an  
electrical concentration, which supplies the customer with range, alarm  
outputs, and a meter readout giving the trace oxygen level. It contains a  
microcontroller that manages all signal processing, input/output, and  
display functions for the analyzer.  
The interface unit receives power from the control unit, and creates  
precision heater and bias voltages for the zirconium oxide sensor.  
2.2 Zirconium Oxide Sensors  
2.2.1 Principles of Operation  
Teledyne’s zirconium oxide sensor is a miniature solid state  
sensor. It uses a stabilized zirconia disc as an electrolyte with a sensing  
electrode (the cathode) and a counter electrode (the anode) on each side  
of the disc. The zirconia is heated to a temperature of about 500°C via a  
built-in heater. By applying a suitable reference voltage across the  
cathode and anode, the heated zirconia acts as an electrolyte which is  
capable of moving oxygen ions within its crystalline structure. This  
allows for the reduction of oxygen molecules reaching the cathode and  
the generation of a current equivalent to the amount of oxygen in a  
sample measured in parts per million (ppm).  
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Operational Theory  
Model 3190Z  
The sensor is designed for long term stability with an operating  
life of 5 years.  
This unit features one or two sensors, and can be custom-designed  
for a specific range of oxygen analysis.  
2.2.2 The Effect of Pressure  
In order to state the amount of oxygen present in the sample as a  
specific portion of the gas mixture, it is necessary that the sample diffuse  
into the sensors under constant pressure.  
If the total pressure increases, the rate that oxygen reaches the  
sensors will also increase. The electron transfer, and therefore the  
external current, will increase, even though the proportion of oxygen has  
not changed. It is therefore important that the sample pressure at the  
sensors, (usually vent pressure) remain relatively constant between  
calibrations.  
2.3 Electronics  
2.3.1 General  
The signal processing uses a microcontroller with on-board RAM  
and ROM to control all signal processing, input/output, and display  
functions for the analyzer. System power is supplied from a universal  
power supply module designed to be compatible with most international  
power sources.  
The power supply circuitry is on the Power Supply PCB, which is  
mounted vertically, just behind the rear panel of the control unit.  
The signal processing electronics, which includes the signal  
amplifiers, microcontroller, analog to digital converter, and digital to  
analog converter, are located on the Main PCB. It is mounted vertically  
just behind the front panel of the control Unit.  
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Trace Oxygen Analyzer  
Operational Theory  
2.3.2 Signal Processing  
Figure 2-4 is a block diagram of the signal processing electronics  
described below.  
Figure 2-4: Block Diagram of the Signal Processing Electronics  
In the presence of oxygen, the sensor(s) produce a current. A  
current to voltage amplifier (I–E AMPL) converts this current to a  
voltage.  
The output from the I-E amplifier and subsequent buffer circuit (not  
shown) is sent to an analog to digital converter (ADC), and the resulting  
digital concentration signal is sent to the micro controller.  
The digital concentration signal along with input from the front  
panel buttons (KEYBOARD) is processed by the micro controller, and  
appropriate output signals are directed to the display, alarm relays, and  
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Operational Theory  
Model 3190Z  
RS-232 (optional) output. The same digital information is also sent to a  
8-bit digital to analog converter (DAC) that produces the 0-10 VDC  
analog concentration signal and the 0-10 VDC analog range ID output.  
A current to voltage converter (E–I CONV) produces the 4-20 mADC  
analog concentration signal.  
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Installation  
Installation  
Installation of the analyzer includes:  
1. Unpacking the system.  
2. Mounting the control unit and external sample block.  
3. Making the electrical connections.  
4. Making the gas connections.  
5. Testing the installation.  
CAUTION:  
READ THIS CHAPTER IN ITS ENTIRETY BEFORE  
INSTALLING THE UNITS.  
THE MODEL 3190Z IS FOR INDOOR USE ONLY.  
THE SAMPLE MUST BE FREE OF ENTRAINED  
SOLIDS, WATER, OR COMBUSTIBLE COMPOUNDS.  
3.1 Unpacking the Analyzer  
As soon as you receive the instrument, carefully unpack and inspect  
control unit, external probe, and any included accessories for damage.  
Immediately report any damage to the shipping agent. The analyzer is  
shipped with all materials needed to install and prepare the system for  
operation.  
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Installation  
Model 3190Z  
3.2 Location and Mounting  
3.2.1 Control Unit Installation  
The 3190Z control unit is designed to be panel-mounted in a  
general purpose, indoor area, away from moisture and the elements. The  
unit should be installed at viewing level in a sheltered area.  
CAUTION:  
FOR THE DC POWERED VERSION, THE CONTROL  
UNIT CHASSIS MUST BE ISOLATED FROM THE  
INPUT POWER GROUND.  
Refer to the Outline Diagram for the physical dimensions of the  
analyzer, which can be found at the back of the manual.  
3.2.2 External Probe Installation  
The external probe should be installed as close as possible to the  
control unit  
The standard Model 3190Z includes the external probe unit  
depicted in the Final Assembly and the Analysis Unit (probe) Outline.  
Dimensions are also given in the Specifications section in the Appendix.  
For special applications, the type of external probe unit supplied  
may vary depending on the specific process. With these systems,  
specific installation and interconnect information is given in a separate  
probe manual or in an addendum to this manual depending on the model  
External Probe used. The addendum will reference the specific Outline  
and Interconnection Drawings in the Drawings section of this manual,  
and provides any other appropriate information.  
3.3 Electrical Connections  
Figure 3-2 shows the two alternate Model 3190Z rear panels. The  
first illustration shows the AC powered version, and the second  
illustration shows the DC powered version. The only difference between  
them is the power connections; all other connections are the same.  
Primary Input Power (AC version): The power cord receptacle, fuse  
block and power switch are located in the same assembly. A 6-foot  
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Trace Oxygen Analyzer  
Installation  
standard AC power cord is supplied with the control unit. Insert the  
female plug end of the power cord into the power cord receptacle.  
The universal power supply allows direct connection to any 100-  
240VAC, 50/60 Hz power source. The fuse block, to the right of the  
power cord receptacle, accepts a 5 × 20 mm, 0.5A time-delay fuse (see  
Fuse Replacement in Chapter 5 - Maintenance).  
The power switch is located on the right-hand end of the power  
source input receptacle assembly.  
Primary Input Power (DC version): The 10–36 VDC power is  
connected via the + and terminals in the upper-left corner of the panel.  
The fuse receptacle, to the right of the power terminal strip, holds a 0.5A  
fast-acting fuse (see Fuse Replacement in Chapter 5 - Maintenance).  
The Power switch is located below the fuse receptacle.  
CAUTION:  
INSERT THE STRIPPED TIPS OF WIRES ENTIRELY  
INTO THE TERMINAL BLOCKS. DO NOT LEAVE  
EXPOSED WIRE OUTSIDE OF THE HOLES IN THE  
BLOCKS.  
CAUTION:  
THE CONTROL UNIT CHASSIS MUST BE ISOLATED  
FROM THE GROUNDING SYSTEM OF THE DC INPUT  
POWER.  
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Model 3190Z  
Figure 3-2 Rear Panel Electrical Connectors for AC and DC Units  
Analog Outputs: There are three DC output signal connectors with  
screw terminals on the panel. There are two wires per output with the  
polarity noted. See Figure 3-3. The outputs are:  
0–10 V Concentration: Voltage is proportional to oxygen reading, from  
0 V at 0 ppm oxygen to 10 V at full scale ppm  
oxygen. (Full scale = 100% of programmed  
range).  
0–10 V Range ID:  
3.33 V = Low Range, 6.66 V = High Range  
4–20 mA % Range: Current is proportional to oxygen reading, from 4  
mA at 0 ppm oxygen to 20 mA at full scale ppm  
oxygen. (Full scale = 100% of programmed  
range).  
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Trace Oxygen Analyzer  
Installation  
Alarm Relays: The three alarm circuit connectors are screw terminals  
for making connections to internal alarm relay contacts. There is one set  
of contacts for each type of alarm. Contacts are Form C, with normally  
open and normally closed contact connections capable of switching up  
to 0.5A at 125 VAC into a resistive load.  
The alarm relay circuits are designed for failsafe operation,  
meaning the relays are energized during normal operation. If power fails  
the relays de-energize (alarms activated).  
The contact connections are indicated diagrammatically on the rear  
panel as normally closed (NC), common (C), and normally open (NO).  
Figure 3-3 explains how these act in failsafe operation.  
The specific descriptions for each type of alarm are as follows:  
HI Alarm  
Configured as high alarm (actuates when  
concentration is above threshold). Can be set  
anywhere within the full range of the analyzer (1-  
1,000 ppm), but must be set ABOVE the threshold set  
for the LO Alarm.  
LO Alarm  
Sensor Fail  
Configured as low alarm (actuates when  
concentration is below threshold). within the full  
range of the analyzer (1-1,000 ppm), but must be set  
BELOW the threshold set for the HI Alarm.  
Not active in this product  
Figure 3-3: Contact ID for FAILSAFE Relay Operation  
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Model 3190Z  
External Probe: The receptacle for the analysis unit cable is located in  
the lower left-hand corner of the rear panel. The 6-pin Minifit ™  
connector is keyed to fit only one way into the receptacle; do not force  
it. The other end of the cable consists of four separate wires. These  
should be connected to the terminal strip on the analysis unit as follows:  
Red:  
Black:  
#1  
#2  
White:  
Green:  
#3  
#4  
Refer to the Final Assembly, located at the back of the manual.  
3.4 Gas Connections  
Gas connection instructions depend on the specific external probe  
used and any special requirements of the process being monitored.  
The standard Model 3190Z External Probe has inlet and outlet  
fixtures only. Calibration gases must be externally piped into the sample  
inlet through appropriate valves. Quarter-inch tube fittings are used. For  
metric installations, quarter-inch to 6 mm adapters can be supplied.  
In general, sample flow and pressure must not create significant  
backpressure past the sensor. For the standard probe, 2 SCFH (1 LPM)  
is the nominal recommended flow rate.  
The pressure required will depend on the sampling system. The  
simplest method of pressure regulation is venting the outlet directly to  
atmosphere. If venting into a system of varying pressure, some form of  
pressure regulation is required.  
3.5 Installation Checklist  
Before connecting the instrument to a power source and applying  
power, make sure you have:  
Correctly installed the sample and exhaust gas lines  
Checked for leaks  
Set the sample pressure to 5-10 psig nominal  
Once the above checks have been made, you can apply power. The  
instrument is now ready for operation.  
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Operation  
Operation  
4.1 Introduction  
Once the analyzer has been mounted, the gas lines connected, and  
the electrical connections made, the analyzer can be configured for your  
application. This involves setting the system parameters as follows:  
Defining the user-selectable analysis ranges  
Setting alarm set-points.  
Calibrating the instrument  
All of these functions are performed via the front panel controls,  
shown in Figure 4-1.  
Analyzing a gas sample for the percent oxygen level through the  
cell block is the default mode of operation. The analyzer is monitoring  
the oxygen level as long as no front panel buttons have been pressed.  
Figure 4-1: Front Panel Controls and Indicators  
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Model 3190Z  
4.2 Using the Function and Data Entry Buttons  
When one of the function buttons is being pressed, the analyzer is  
in the Setup mode or the Calibration mode.  
The four setup function buttons on the analyzer are:  
SET HI ALARM  
SET LO ALARM  
SET HI RANGE  
SET LO RANGE  
The Calibration mode button is:  
SPAN  
The data entry buttons (Δ and ) adjust the value displayed on the  
TRACE OXYGEN meter while one of the function buttons is being held  
down.  
• Δ : Increments the displayed value upwards.  
• ∇ : Increments the displayed value downwards.  
Any of the functions can be selected at any time by pressing the  
appropriate button.  
Each function will be described in the following sections. Although  
the operator can use any function at any time, the order chosen in this  
manual is appropriate for an initial setup.  
4.3 Setting the Analysis Ranges  
The two user-definable analysis ranges are both capable of being  
adjusted from 0-10 ppm to 0-1,000 ppm oxygen concentration.  
The analyzer automatically switches from the LO range to the  
HI range when the oxygen concentration reaches the LO range full-  
scale value. It will switch back to the LO range when the oxygen  
concentration falls below the LO range full-scale value  
Note: The HI Range set-point MUST be set at a higher  
concentration than the LO Range set-point.  
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Operation  
4.3.1 HI Range  
Setting the HI Range full-scale value defines the LEAST sensitive  
analysis range to be used. To set the HI Range:  
1. Press the SET HI RANGE function button once.  
2. Immediately (within 5 seconds) press either the Δ or button  
to raise or lower the displayed value as required, until the  
display reads the desired full-scale concentration.  
4.3.2 LO Range  
Setting the LO Range full-scale value defines the MOST sensitive  
range to be used. To set the LO Range:  
1. Press the SET LO RANGE function button once.  
2. Immediately (within 5 seconds) press either the Δ or button  
to raise or lower the displayed value as required, until the  
display reads the desired full-scale concentration.  
4.4 Setting the Alarm Setpoints  
The alarm set-points can be adjusted over the full range of the  
analyzer (0-1,000 ppm oxygen content). The set-point values are  
expressed in ppm only.  
Note: The HI Alarm set-point MUST be set at a higher  
concentration than the LO Alarm set-point.  
4.4.1 HI Alarm  
Setting the HI Alarm sets the value ABOVE which the HI Alarm  
will activate. To Set the HI Alarm:  
1. Press the SET HI ALARM function button once.  
2. Within 5 seconds press either the Δ or button to raise or lower  
the displayed value as required, until the display reads the  
desired concentration.  
4.4.2 LO Alarm  
Setting the LO Alarm sets the value BELOW which the LO alarm  
will activate. To set the LO Alarm:  
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Model 3190Z  
1. Press the SET LO ALARM function button once.  
2. Within 5 seconds press either the Δ or button to raise or lower  
the displayed value as required, until the display reads the  
desired concentration.  
4.4.3 Sensor Fail Alarm  
Not active in this product.  
4.5 Selecting a Fixed Range or Autoranging  
The Model 3290 can operate in fixed high, fixed low, or auto-  
ranging mode. To change modes:  
1. Press and then release the SET HI RANGE and the SET LO  
RANGE buttons simultaneously.  
2. Within 5 seconds press either the Δ or button until Auto, Lo,  
or Hi displays on the LCD, as desired.  
After about three seconds, the analyzer resumes monitoring in the  
selected range mode.  
4.6 Calibration  
Power up the analyzer and allow the LED reading to stabilize. Wait at  
least ten minutes after powering, giving the heater and bias voltages  
enough time to reach operating voltage. Set the alarm set-points and the  
full-scale ranges to the desired values.  
Procedure:  
1. Apply calibration gas of a known concentration. A span gas  
containing an oxygen content of 60-100% of the range of the  
analyzer is recommended.  
Note: If the analyzer output goes above the high alarm set-point  
or below the low alarm set-point, the front panel ALARM  
Indicator located beneath the SET function buttons will blink.  
When the SPAN key is pressed, the alarm indicator will stop  
blinking.  
2. Press the SPAN button once.  
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Trace Oxygen Analyzer  
Operation  
3. Immediately (within 5 seconds) press either the Δ or button  
until the display is stable and displays the oxygen concentration  
of the applied calibration gas. Once set, the unit will enter  
Analyze Mode after approximately three seconds.  
The unit is now calibrated.  
If the output of the sensor is outside of the expected range, this may be  
caused by:  
a)  
Bad electrical connection between the control and  
analysis unit  
b)  
c)  
Improperly analyzed or entered calibration gas value  
Electronics failure  
The unit will not accept the attempted calibration and will flash  
‘0000’ on the LED display unit a valid calibration is performed.  
4.7 LED Display on StartUp  
When the unit is powered, it will initially display “8.8.8.8” for a  
short period of time. This is to confirm all LED segments are  
functioning. Afterward, the LED display will initiate a delay countdown,  
allowing the sensor’s heater to begin charging and capture a zero  
reading. Flowing “zero” gas or a sensor is not needed for this  
instrument adjustment.  
Teledyne Analytical Instruments  
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Operation  
Model 3190Z  
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Teledyne Analytical Instruments  
22  
 
Trace Oxygen Analyzer  
Maintenance  
Maintenance  
Aside from normal cleaning and checking for leaks at the gas  
connections, the Model 3190Z should not require any maintenance  
beyond replacement of zirconium oxide sensors, and perhaps a blown  
fuse. Routine maintenance includes occasional recalibration, as  
described in Chapter 4 - Operation.  
5.1 Replacing the Fuse  
5.1.1 AC Powered Units  
When a fuse blows, check first to determine the cause, then replace  
the fuse using the following procedure:  
1. Disconnect the AC power and place the power switch located on  
the rear panel in the O position. Remove the power cord from the  
receptacle.  
2. The fuse receptacle is located in the power cord receptacle  
assembly in the upper left-hand corner of the rear panel. See  
Figure 5-1.  
Figure 5-1: AC Fuse Replacement  
Teledyne Analytical Instruments  
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Maintenance  
Model 3190Z  
3. Insert a small flat-blade screwdriver into the slot in the receptacle  
wall nearest the fuse and gently pry open the fuse receptacle. The  
fuse holder will slide out. The fuse in use is visible in the clip.  
To open the spare fuse compartment, push on one end until it  
slides out.  
4. Remove the bad fuse and replace it with a 5×20 mm 0.5 A,  
250 VAC, IEC, time lag (T) fuse (P/N F1128) for AC units.  
5. Replace the fuse holder into its receptacle, pushing in firmly  
until it clicks.  
5.1.2 DC Powered Units  
In units with DC power, the fuse is located on the rear panel above  
the ON/OFF switch.  
1. Open the fuse holder by unscrewing and removing the cap  
marked FUSE.  
2. The fuse is located inside the receptacle, not inside the cap. Both  
terminals are on the same end of the fuse. Pull straight out  
without twisting to remove the old fuse from the receptacle, and  
replace it with a 0.5 A, 125 VDC, very quick acting (FF)  
Microfuse (P/N F51).  
3. Replace the cap by screwing it back into the receptacle.  
5.2 Sensor Installation or Replacement  
5.2.1 When to Replace a Sensor  
The sensors used in this product will typically last five years or  
longer in service. Typically, the sensors will fail either high or  
low. Inaccurate or erratic readings are a sign that one of the  
sensors may have failed. In most cases, we recommend the  
entire unit be returned to an authorized Teledyne Service Center  
for sensor replacement.  
Teledyne Analytical Instruments  
24  
 
Trace Oxygen Analyzer  
Appendix  
Appendix  
A.1 Specifications  
Ranges: Two user selectable ranges can be set  
between 0-10 ppm and 0-1,000 ppm  
oxygen. Default ranges are 0-100 ppm and  
0-1,000 ppm oxygen  
Signal Output: Voltage: 0–10 VDC, negative ground  
Current: 4-20 mA, negative ground  
Range ID: 0-10 VDC  
Display: Light-emitting diode (LED) display  
Alarms: One high alarm relay, adjustable; one low  
alarm relay, adjustable; one sensor failure  
relay. All alarms failsafe.  
System Operating Temp: 0 - 50°C  
Accuracy: ±2% of full scale at constant temperature  
±5% of full scale over 0-50°C range once  
temperature equilibrium is reached (at 3%  
and 5% user defined ranges).  
Response Time: 90% in less than 20 seconds at 25°C  
System Power: AC (100-240 VAC, 47/440 Hz), or DC  
Requirements: (10-36 VDC); user specified  
System Enclosure: Panel Mount: 2.81" H × 6.0" W × 2.87" D  
(71.4 mm × 152.4 mm × 72.9 mm).  
Face Plate: 3.75" H × 7.0" W (95.3 mm H ×  
177.8 mm W). Faceplate rated to NEMA-4  
Sensor Type: Zirconium Oxide  
Analysis Unit: 4.0" H × 6.0" W × 3.25" D  
(101.6 mm × 152.4 mm × 82.6 mm)  
Teledyne Analytical Instruments  
25  
 
Appendix  
Model 3190Z  
A.2 Spare Parts List  
1*  
1*  
1
C-64586A  
C-64586B  
C-76491C  
C-76490C  
F-1130  
PC Board, Power Supply (AC-version)  
PC Board, Power Supply (DC-version)  
PCB Board, Main  
1
Interface Unit  
2*  
Fuse (AC), ½A, 250 VAC  
IEC Type T, 5x20mm  
1*  
1
F-51  
Fuse (DC), ½A, 125 VDC Micro-fuse  
Sensor, 0-1,000 ppm, zirconium oxide  
S-1439  
* - configuration-dependent  
A minimum charge of US $150.00 is applicable to spare parts orders.  
IMPORTANT: Orders for replacement parts should include the  
part number and the model and serial number of the  
system for which the parts are intended.  
Send orders to:  
TELEDYNE ELECTRONIC TECHNOLOGIES  
Analytical Instruments  
16830 Chestnut Street  
City of Industry, CA 91749-1580  
Telephone: (626) 961-9221  
TWX: (910) 584-1887 TDYANYL COID  
Fax: (626) 961-2538  
…or your local representative.  
Teledyne Analytical Instruments  
26  
 
Trace Oxygen Analyzer  
Appendix  
A.3 Drawing List  
D-76533  
Outline/Interconnection Diagram  
A.4 Miscellaneous  
The symbol: ~ is used on the rear panel of the model 3190Z to  
signify volts alternating current (VAC).  
Teledyne Analytical Instruments  
27  
 

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