installation and operation instructions

ADI5775-B
INSTALLATION AND OPERATION INSTRUCTIONS
Before Installing or Operating, Read and Comply with These Instructions
Controls Corporation of America
1501 Harpers Road • Virginia Beach, VA 23454
To Order Call 1-800-225-0473 or 757-422-8330 • Fax 757-422-3125
www.concoa.com
March 2014
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2
Please Read Before Installation
The following will damage the Oxygen monitor.
1. The O2 monitor requires 24 VDC regulated power. Please Do Not connect
the monitor to any voltage that exceeds 24 Volts DC, or ANY AC Voltage.
2. Do not power the Oxygen monitor with the oxygen sensor unplugged from the
main PC board. Do Not Connect the O2 sensor to the PC board while the
monitor is powered. This Will Damage the O2 sensor.
3. The oxygen sensor cell is matched to the electronics. Never exchange the
electronics with an oxygen sensor from a different monitor.
4. When calibrating or challenging the O2 Ex monitors,
a. Do not expose the monitor to flow rates that exceed ½ liter per
minute, (500 cc per minute) flow.
b. When testing Sample Draw and Ex type monitors use an On
Demand regulator to expose the span gas to the monitor.
c. Expose the monitor to span gas blends that consist of Oxygen and
Nitrogen only. Do Not expose the monitor to any combustible
gas, i.e. Methane, Hydrogen, etc. Exposure to combustible span
gases can damage the oxygen zirconium sensor cell.
5. Do not expose the Oxygen monitor to silicone compounds. They can cause a
loss of sensitivity.
6. Do not expose the monitor to high flow air or install it directly in front of fans.
The high air flow can cool the oxygen sensor and cause an inaccurate
reading.
7. When using the O2 monitor, do not expose the oxygen sensor directly to a
water stream. In areas requiring wash downs, cover and protect the monitor
and power supply. Contact CONCOA for details on a waterproof enclosure.
3
Table of Contents
1: Introduction ..................................................................................................................................2
1.1 Key Features ....................................................................................2
1.2 Component identification.................................................................3
2: Specifications ...............................................................................................................................9
2.1 Performance Specifications .............................................................9
2.2 Gas Detection System ......................................................................9
2.3 Signal Outputs ..................................................................................9
2.4 Electrical Requirements ...................................................................9
2.5 Physical Characteristics ...................................................................9
2.6 System Default Factory Settings ....................................................10
3: Installation .................................................................................................................................11
3.1 Site Requirements ..........................................................................11
3.2 Mounting ........................................................................................11
3.3 Wiring ............................................................................................12
3.4 Initial Startup .................................................................................13
4: Normal Operation ......................................................................................................................14
4.1 Signal Outputs ................................................................................14
4.2 Instrument Faults ...........................................................................14
4.3 Routine Maintenance Schedule......................................................15
4.4 Loss of Power Indicator .................................................................15
4.5 Alarm Reset ...................................................................................15
5: O2 Monitor Programming ..........................................................................................................16
5.1 Joystick Operation .........................................................................16
5.2 Program Flowchart.........................................................................17
5.3 Entering the Password....................................................................21
5.4 Changing the User Password .........................................................22
5.5 Entering the Menus ........................................................................25
5.5.1 Set 4-20mA Loop ..................................................................25
5.5.2 Set Formats ...........................................................................27
5.5.3 Set Alarm Threshold Polarity ...............................................29
5.5.4 Set Latching ..........................................................................31
5.5.5 Resetting a Latching Alarm ..................................................34
5.5.6 Set Alarm Delay ....................................................................34
5.5.7 Set Zero Suppression ............................................................34
5.5.8 Set Alarm Thresholds ...........................................................35
5.5.9 Set Alarm Hysteresis.............................................................37
5.5.10 Set Sensor Adjust ................................................................38
5.5.11 Main Operation Mode .........................................................39
6: Maintenance & Cell Verification ...............................................................................................40
6.1 Sensor Verification ........................................................................40
6.2 Sensor Verification Procedure .......................................................41
7: Appendix ....................................................................................................................................44
Rev 4.0 March 26, 2014
4
1: Introduction
The O2 Deficiency Monitor is a compact gas monitoring system that’s ideal for the
continuous monitoring of inert gas storage areas, confined spaces, and other locations
where low oxygen levels may pose a hazard to personnel. Unlike electrochemical sensor
cells the O2 zirconium cell provides stable oxygen readings even in areas where
temperature and humidity levels are changing. The CONCOA O2 Deficiency Monitor is
suitable for either indoor or outdoor use. Factory calibrated against a NIST traceable
reference standard and Ce approved.
The heart of the monitoring system is a long lasting zirconium sensor, which responds to low
oxygen conditions within seconds and provides accurate measurements over a wide temperature
and humidity range. The zirconium O2 sensor cell will operate continuously for 10 or more
years and requires an absolute minimum of maintenance. There are no zero or span calibration
pots to adjust and when compared to disposable type sensors, our long life zirconium O2 sensor
can save up to hundreds of dollars in annual maintenance.
Ideal for continuously monitoring oxygen levels in confined spaces or areas where inert gases are
used, the O2 Deficiency Monitor does not drift or loose sensitivity when the weather or
temperature changes. The electronics are housed in a Nema 3 housing.
Each system consists of a long life zirconium oxide sensor cell and three-wire transmitter. The
O2 monitor may be used as a stand-alone gas detector, linked to optional CONCOA single and
multipoint controllers, or connected to your own centralized control and surveillance system.
This manual covers the installation, operation, and maintenance of the O2 deficiency monitor.
1.1 Key Features
The O2 monitor incorporates a number of user-friendly features designed to simplify installation,
operation, and maintenance.
1.1.1 Long Life Zirconium Oxide O2 Sensor
The system’s O2 sensor cell has a life of well over 10 years of continuous operation. Unlike
concentration O2 cells, CONCOA’s exclusive zirconium oxide sensor cell does not need an
oxygen reference gas for proper operation. The O2 monitor can detect low oxygen levels in
confined spaces and process tools without the need of a reference gas.
1.1.2 Smart Electronics
The O2 monitor incorporates a special electronic circuit that continuously monitors sensor
operation. With the addition of the alarm relay option, any cell degradation or complete failure
will immediately be detected. This smart circuitry alerts the user to sensor faults and other
5
electrical problems that may interrupt surveillance through the standard mA signal output signal
or through the optional fault relay option.
1.1.3 Calibration
The O2 monitor incorporates a stable zirconium oxide sensor that rarely requires calibration.
Changing barometric pressure changes or changes in temperature and humidity do not affect the
zirconium oxide oxygen cell. The earth is a wonderful source of calibrated oxygen at 20.9%,
therefore under ambient conditions verification of the O2 monitor to 20.9% oxygen is constantly
being performed. There are no zero or span pots to adjust. The O2 monitor only requires periodic
testing with nitrogen to verify the cells response to low oxygen levels. See Section 6.2 for the
testing procedure to nitrogen.
1.2 Component Identification
1.2.1 Front View Exterior
6
8
8
2
1
8
7
9
6
3
4&5
1.
2.
3.
4.
5.
Digital Display — 3-digit backlit LCD digital display for showing the
oxygen levels in percent.
Joystick — Used for selecting and adjusting the built-in menus. The
O2 monitor is available with optional dual level user selectable relays.
The joystick is also used to select alarm levels, relay settings and
resetting any latching visual and audio alarms.
Cable Port — This is the opening in the transmitter housing for
connecting the 4-20 mA output and 24 VDC power cable.
Sensor Protector—The O2 sensor is heated and the sensor protector
shields the cell as well as provides airflow to the cell. It also has a ¼ “
diameter tube fitting to permit connecting a nitrogen cylinder for
testing the O2 cell response. NOTE: The sensor protector will feel
HOT to the touch. This is normal.
Oxygen Sensor — A zirconium oxide sensor, which detects and
measures the level of oxygen. When exposed to oxygen, the sensor
6
6.
7.
8.
9.
outputs an electrical signal proportional to the actual concentration of
oxygen.
Mounting Feet — There are 4 feet used to mount the oxygen monitor
to a wall or other flat surface.
Transmitter Cover — A removable cover that protects the interior of
the transmitter.
Transmitter Cover Fasteners — There are 4 captive screws secure
the transmitter cover in place.
Electronics Fasteners — These captive screws secure the electronics
to the enclosure
1.2.2 Front View Exterior with Relay Option
6
1
2
9
9
10
Al 2
Al 1
Fault
6
4&5
3
10. Alarm Indicators — 3 multi colored LED indicators for showing:
4&5
Alarm level 1
Alarm level 2
Fault Alarm
Orange LED
Red LED
Yellow LED
7
1.2.3 Side View Exterior with Audio Alarm
11
11. Audio Horn — This optional built-in horn is a 90dB high pitched
audio sound that will activate when the oxygen levels go below the
selected alarm thresholds. The audio alarm is non-latching and will
automatically turn off when the oxygen levels go above the alarm
thresholds
NOTE: The audio alarm is an immediate alarm. Oxygen levels must recover above the
alarm thresholds before the horn turns off. There is no alarm delay function or
latching capability available.
1.2.4 Front view TX-1100-KF25 for vacuum chamber monitoring
3
8
Side view TX-1100-KF25 for vacuum chamber monitoring
9
12. KF-25 vacuum sensor assembly — Consists of the oxygen sensor
cell and KF25 vacuum fitting. The vacuum sensor assembly is designed to
mount directly into a mating KF-25 vacuum fitting.
WARNING: The Oxygen sensor cell must be handled with care. Never bounce or
drop the cell. Mating the cell into the KF-25 flange will support oxygen monitor
electronics and protect the cell
9
Oxygen cell and KF-25 flange
Oxygen monitor with KF flange
attached directly to the monitor
NOTE: Cell is delicate. When
mounted in the corresponding
flange it is protected
Strain relief for power, analog
output and alarm relay wiring
1.2.5 Front view TX-1100-DRAP for glove box mounting
Strain relief for
power and relay
outputs
Mounting Plate
NOTE: The
O-ring must be
installed to
insure an
airtight seal.
Oxygen monitor for glove box Bottom View
It rests inside
the O-ring
groove on the
bottom of the
mounting plate
10
1.2.6 Transmitter Interior
2. Sensor cell
connector
1. Power
Analog output
Terminal Block
Fuse
(Field
replaceable)
Common
Common
mA output
+ 24 VDC
+ 24 VDC
1. Power Analog Terminal Block — This terminal block is where the
24VDC power and 4-20 mA analog output connection is made.
2. Sensor Cell Connector — This connector is where the Oxygen sensor
cell is connected. NOTE: Never connect the oxygen sensor to this
connector while the monitor is powered. This will damage the
oxygen sensor
11
1.2.7 Alarm Relay Board
Relay 2
Relay 1
Fault Relay
NC C NO
NC C NO
NC C
NO
Remote
Reset
Horn Connector
Oxygen sensor
1.2.8 Enclosure Mounting Feet
connector
Mounting Feet can
be oriented in any
direction
Feet can also be
removed for
mounting the O2
monitor flush with
a wall or other
surface
8
12
2: Specifications
NOTE: For our continual product improvement, all specifications are subject to change without
notice.
2.1 Performance Specifications
Sensor Type:
Long Life Zirconium Oxide Sensor Cell 0-25%
Response Time:
Within 1 second of any change in O2.
Repeatability:
± 1% of reading
Fault Indicators:
Loss of VDC power (analog signal drops to 0 mA).
Sensor cell failure: Fault relay activated. (Must have Alarm relay option
for cell failure to operate)
Operating Temp:
-40° to 134°F (-40° to +55°C); consult CONCOA for lower or higher
operating temperatures.
Humidity:
0 to 95% RH; consult CONCOA for sensors which can operate in 100%
condensing RH environments.
2.2 Gas Detection System
Type:
Long Life Zirconium Oxide Sensor Cell, Range 0-25%
Sensor Life:
Transmitter:
8 to 10+ years under normal conditions.
Microprocessor electronics with built-in 3-digit backlit LCD display
Joystick operated menus
2.3 Signal Outputs
Local Display:
Digital display calibrated for Oxygen. The range is stated on the serial
number and can be accessed via the joystick on the front panel. In the
measurement mode pushing the joystick down will scroll the gas and
range on the display. Push the joystick down again to stop the scrolling
and display the gas again.
Standard
Analog Output:
Optional
Relay Output: Dual level user selectable alarm relays and one fault relay
Rated, 2amps @ 30VDC; 2amps @ 240VAC
DC 4-20 mA
2.4 Electrical Requirements
Power:
24 VDC external power. A regulated 24VDC power supply is required.
Consumption:
Approximately 250mA
13
2.5 Physical Characteristics
Dimensions:
5.125 (W) x 3.15 (H) x 3.00 (D) inches; 130 x 80 x 76 mm (Max with
feet)
Weight:
1.1 pounds (0.5 kg)
Enclosure Type:
General purpose; not intended for explosive atmospheres.
2.6 AirCheck O2 System Default Factory settings
The O2 Deficiency Monitor, when supplied with the optional Relay module, is shipped with
factory defaults for the alarm relay settings. The following are the factory defaults:
Menu Function
Factory Default
Menu Defined
Use this function to adjust the
Oxygen monitors 4mA, (Zero) and
20mA, (Span) to your PLC or
distributive control system.
Alarm 1 = Normal
Do you want the relays to
Set Formats
energize, (normal) or de-energize,
LED and alarm relay Alarm 2 = Normal
Fault = Normal
(fail safe) when the alarm
State **
activates?
Do you want to alarm at a level
Set Alarm Threshold Alarm 1 = Inverted
Alarm 2 = Inverted
higher, (normal) or lower,
Polarity
Audio = Inverted*
(inverted) than the alarm
threshold?
Alarm 1 = Non-latching Do you want the alarm to
Set Latching
Alarm 2 = Non-latching automatically reset? (non-latching)
Audio = Non-latching
or do you want to manually reset
the alarm? (latching)
Alarm = 5 seconds
How long do you want to wait
Alarm Delay
until the alarms activate?
000 = 0.00%
Zero Suppression
This function is Not Enabled on
Refer to section 4.5.6
the Oxygen monitor.
Alarm 1 = 19.5 %
At what level do you want to
Set Alarm
Alarm 2 = 18.0 %
alarm?
Thresholds
Audio = 19.5%*
For use when using the O2 monitor
Set Alarm Hysteresis Alarm 1 = 0.0 %
Alarm 2 = 0.0 %
for control or valves and process.
Audio = 0.0 %
See Section 5.4.8
No factory default
For use when dynamically gas
Sensor Adjustment
calibrating the Oxygen monitor to
a known span gas.
See Section 6.2
Factory default is 557
For use when changing the
Manage Passwords
password from factory default to a
Set 4-20mA loop
The mA output is set at
the factory using a
calibrated Fluke meter.
14
new password of your choice.
NOTE: The built in relay settings may be changed by the user in the field. Refer
to Section 5.5.2
* NOTE: The Audio alarm feature is optional.
** NOTE: The LED indicators on the front panel are connected directly to the
alarm relays.
15
3: Installation
3.1 Site Requirements
The O2 monitor enclosure should be mounted in an area free of vibration and electrical noise or
interference. If possible, avoid areas with high temperatures or condensing humidity.
WARNING: The O2 monitor is not designed for installation in hazardous areas. Consult
CONCOA for information on enclosures for use in hazardous environments.
3.2 Mounting
3.2.1 Transmitter Enclosure
The O2 monitor is designed primarily for wall mounting and should be installed at a height
convenient for operation, maintenance, and viewing of the instrument display. The following is
a drawing of the mounting dimensions.
3.2.2 O2 monitor
The transmitter and sensor should be installed in a location where gas leaks are likely to occur or
where released gases may accumulate. It should be mounted no closer than 12 inches above floor
level. Airflow within the monitored area, the characteristics of the gas (lighter or heavier than
air), and the position of workstations and personnel should all be considered in determining the
most suitable installation location.
16
3.3 Wiring
The O2 monitor requires a single, 3-wire shielded cable for analog output and 24
VDC power input. A three-wire shielded cable; 3-conductor, 18 AWG stranded
General Cable E2203S.30.860, or equivalent is recommended for the connection.
The maximum permissible cable length is 0.62 miles (1 km). The analog out and
VDC power in connections are made on the terminal block inside the transmitter
housing.
-
Common
Common
mA 4-20mA signal output
to PLC
+
+
24VDC Power
24VDC Power
Identification Legend
These connections are made as follows:
Pin #
Connection
Description
-
Common (Signal Ground)
0V
-
Common (Signal Ground)
0V
MA
Signal Out
DC 4-20mA Output
+
Power
DC + 24V Input
+
Power
DC + 24V Input
NOTE: CONCOA has added additional contacts for +24VDC power and Common to
accommodate additional wiring for remote horns and strobes
17
33.4 Initial Startup
Once installation of the gas detector has been completed, it is ready for startup. The following
procedures should be performed before putting the instrument into operation:
1. Check the integrity of all wiring.
2. Apply 24 VDC power.
The instrument should now be powered up. Upon power up, the O2 monitor LCD displays the
CONCOA logo and then starts a 4-minute, (240 second) count down as the current to the
zirconium oxide O2 sensor stabilizes. The monitor will output a 4 mA signal during the entire
warm-up period. After the countdown, the oxygen sensor will continue to reach its operating
temperature for approximately 30 minutes and the reading displayed will slowly increase to
ambient. Do not make any adjustments to the reading until after the monitor has been
powered for at least an hour.
NOTE: When the O2 monitor is supplied with an Audio Horn, it will activate
momentarily at the completion of the warm up.
Oxygen
239 WARM
NOTE: The O2 monitor’s reading may be adjusted to the ambient oxygen level.
See section 6.1 for instructions on adjusting.
18
4: Normal Operation
The O2 monitor is a single point monitor designed for the continuous detection and measurement
of ambient oxygen concentration levels.
4.1 Signal Outputs
The O2 monitor outputs a continuous 4-20 mA analog signal proportional to the measured
concentration of oxygen. 4 mA represents 0% O2 and 20 mA represents 25% O2 which is the full
range. In the event of a system fault, a specific factory defined code will be displayed on the
local digital display. This code will indicate the exact nature of the system fault.
4.2 Instrument Faults
The O2 monitor incorporates a number of self-checking features to ensure
reliable operation. In the event that a fault condition is detected, the analog
output signal is altered as follows:
Condition
Analog Signal
**Supply Voltage Out of
Range Fault code 16
Analog output drops to 2 mA
Transmitter cable cut
Analog output drops to 0 mA
O2 Cell complete failure
Fault Code 128
Analog output drops to 2 mA (0 mA on request)
Fault Relay activates
(Available with Relay Option Only)
O2 System Warm Up
Analog output drops to 2 mA
Fault Relay activates and turns off when system is
in the Oxygen operation mode
(Available with Relay Option Only)
O2 Cell voltage fault
Fault Code 64
Analog output drops to 2 mA (0 mA on request)
Fault Relay activates
(Available with Relay Option Only)
EEPROM Fault 08
Analog output drops to 2mA (0 mA on request)
NOTE: All system faults are displayed on the front panel. Each fault
has it’own specific code to identify the specific problem. Please
contact PureAire whenever a fault is displayed.
** When using your own power supply please insure that the voltage
is regulated to 24VDC +/- 0.5 volts. If the voltage is too low or high
you will activate a “Supply Voltage Out of Range fault and disable
the monitor.
19
4.3 Routine Maintenance Schedule
Continuous gas detection systems depended upon to measure and detect hazardous gas leaks in
the workplace requires periodic maintenance to ensure proper operation. The frequency with
which this routine maintenance is required depends on the environment. The following table is
intended to serve as a general guideline for routine maintenance. The conditions in your
particular application, as well as your organization’s maintenance policies, will ultimately
determine the best routine maintenance schedule for your equipment. Routine Visual Checks
Items to check
Check for power and proper operation
Condition / status when
operating properly
Unit should be outputting a 17.4 mA signal when
the oxygen level is at 20.9%. The LCD digital
display should also indicate 20.9% 02 when the
oxygen is at ambient levels.
4.3.2 Recommended Routine Maintenance Schedule
Routine Visual Checks
Every 6 - 12 months
Sensor Verification with nitrogen
Every 6 - 12 months**
** The ambient oxygen level is 20.9%; therefore, under ambient conditions verification of the O2
monitor to 20.9% oxygen is constantly being performed. The O2 monitor only requires periodic
testing with nitrogen to verify the cells response to low oxygen levels. See Section 5.5.10 for
how to make minor adjustments.
4.4 Loss of Power Indicator
In the event the O2 monitor loses 24VDC power, the 4-20 mA analog output signal drops to
0mA. The LCD display will also display a blank screen.
4.5 Alarm Reset
It the O2 monitor is supplied with the optional alarm relays, whenever the monitors alarms are
activated, the built-in alarm relays, panel mounted LED’s and optional audio horn will also
activate. When the relay settings are non-latching, the alarm relays, LED’s and horn will
automatically reset. If the relay settings are latching, then a manual reset of the alarms are
required. Resetting the alarms can be performed through use of the joystick or through the use of
the remote reset function.
Joystick – You must enter the password to enter the reset function. After the password is entered
and accepted, push the joystick in; (enter) to reset the alarms.
Remote Reset – See section1.2.7. The alarm relay board has a two-pin connector for wiring to a
remote switch. When connected to a switch, this remote reset will bypass the joystick and a
password will not be needed to reset the alarms.
NOTE: The oxygen levels must recover above the alarm thresholds before the horn can be
reset from the remote reset switch or joystick.
20
5: O2 Monitor Programming
The O2 Deficiency Monitor is supplied with user selectable settings to adjust the alarm
settings, 4 and 20mA output and minor sensor adjustments. The settings are arranged in
menus that are accessed by moving the joystick. To access the menus a factory set
password is used.
NOTE: The O2 Deficiency Monitor will continuously monitor oxygen while accessing the
menus. The alarm, fault relays and mA output are all active and on line while making
any changes to the menus.
5.1 Joystick Operation
The O2 monitor uses a 4-position joystick with a center pushbutton for selecting menus and
changing values. The joystick is programmed to standard protocol as follows:
NOTE: The joystick has a built-in delay to prevent accidental tampering of the menus.
Deliberate entries are required.
CAUTION: Only qualified personnel should perform programming, maintenance and
sensor verification
+ Plus
Previous
s
Next
- Minus
Plus – Pushing the joystick in this direction increases the value
Minus – Pushing the joystick in this direction decreases the value
Next – Pushing the joystick in this direction moves you to the next level of the menu hierarchy.
Previous – Pushing the joystick in this direction takes you out to the last level of menu hierarchy.
Enter – Pushing the joystick directly in the center enters the information into the microprocessor
21
5.2 Program Flowchart
Oxygen
Enter
Password
A
PassCode OK
20.9%
PassCode OK
Set 4-20mA
loop
Set 4mA
Zero
255
Set 20mA
Span
255
Force loop
Set Formats
Format
Relay 1
Not available
NOTE: All
numerical values
shown are only
examples and are
not Factory
Defaults
Normal
Invert
Format
Relay 2
Normal
Invert
Format Fault
Relay
Normal
Invert
22
PassCode OK
Set Alarm
Threshold
Polarity
Set Alarm 1
Polarity
Normal
Invert
Set Alarm 2
Polarity
Normal
Invert
Set Audio
Alarm
Polarity
Set Latching
Not available
Set Latching
Nonlatch
Relay 1
Latch
Set Latching
Relay 2
Nonlatch
Latch
Set Latching
Audio
NOTE: All
numerical
values
shown are
only
examples
and are not
Factory
Defaults
Not Available
Alarm Delay
005
 NOTE:
Zero
suppression
function is
not available
for Oxygen
23
* NOTE: Zero
PassCode OK
Zero
Suppression
Set Alarm
Thresholds
000 *
Set Relay 1
Alarm
19.5%
Set Relay 2
Alarm
18.0%
Set Audio
Alarm
Set Alarm
Hysteresis
suppression
function is not
available for
Oxygen
Set Alarm 1
Hysteresis
Set Alarm 2
Hysteresis
Set Audio
Alarm
Hysteresis
19.5%
NOTE: All
numerical
values shown
are only
examples
0.0%
0.0%
and are
Not Factory
Defaults
0.0%
Alarm
Sensor
Adjustment
Hystereses
Set sensor
span
Set sensor
zero
055
Not Available **
24
PassCode OK
Manage
Passwords
Enter New
User
Password
Enable User
Password
A
Enabled
Disabled
Reset User
Password
Not Available
25
5.3 Entering the Password
The Oxygen monitor is supplied with a factory set password to prevent unauthorized access to
the menus. The Password is 557. The following explains how to enter the password.
1. Push the joystick once to the right. Enter Password will scroll on the first line of the
digital display. The second line will still display the current oxygen level.
..Enter password…
20.9 %
20.9%
2. Push the joystick again once more to the right to enter the input screen. The letter A will
appear and flash.
A
20.9%
NOTE: The display has characters that start with A through Z and 0 through 9.
Pushing the joystick up or down will permit you to scroll through the
alphanumeric characters.
3. Push the joystick up or down to enter the first digit. The display is an alphanumeric
display and toggles from A through Z followed by 0 to 9. The character to be entered will
flash.
5
20.9%
4. Push the joystick again to the right to select the second entry. Push the joystick up or
down to select the second digit. The character being entered will flash and the first
character entered will remain lit.
55
20.9%
5. Push the joystick again to the right to select the third entry. Push the joystick up or down
to select the third and final digit. The character being entered will flash and the first and
second characters entered will remain lit. You are now ready to enter the 3-digit
password.
557
20.9%
6. Push the joystick in the center to enter the password. If you entered it correctly the
display will scroll Password OK.
...PassCode OK……
20.9%
26
NOTE: If an incorrect password has been entered, the display will indicate
Password Failed. Push the joystick to the left to access the monitoring mode. From
this mode you can reenter the password again.
27
5.4 Changing the User Password
The Oxygen monitor is supplied with a factory set password to prevent unauthorized access to
the menus. The user can change this password and the following explains how to change the
password.
1. Push the joystick down to access the Manage Passwords Menu. Manage Passwords
will scroll on the first line of the digital display. The second line will still display the
current oxygen level.
..Manage Passwords…
20.9%
2. Push the joystick to the right to enter the input screen. Enter New User Password will
scroll on the first line of the digital display
…Enter New User Password…
20.9 %
3. Push the joystick to the right to enter the input screen. The letter A will appear and
flash.
A
20.9%
NOTE: The display has characters that start with A through Z and 0 through 9.
Pushing the joystick up or down will permit you to scroll through the
alphanumeric characters.
4. Push the joystick up or down to enter the first digit. The display is an alphanumeric
display and toggles from A through Z followed by 0 to 9. The character to be entered will
flash.
2
20.9%
5. Push the joystick again to the right to select the second entry. Push the joystick up or
down to select the second digit. The character being entered will flash and the first
character entered will remain lit.
25
20.9%
28
6. Push the joystick again to the right to select the third entry. Push the joystick up or down
to select the third and final digit. The character being entered will flash and the first and
second characters entered will remain lit. You are now ready to enter the 3-digit
password.
253
20.9%
7. Push the joystick in the center to enter the password. This will display the next
command, Re-Enter New Password
…Re-Enter New Password...
20.9 %
8. Push the joystick to the right to enter the input screen. The letter A will appear and
flash.
A
20.9%
9. Push the joystick up or down to enter the first digit. The display is an alphanumeric
display and toggles from A through Z followed by 0 to 9. The character to be entered will
flash.
2
20.9%
10. Push the joystick again to the right to select the second entry. Push the joystick up or
down to select the second digit. The character being entered will flash and the first
character entered will remain lit.
25
20.9%
11. Push the joystick again to the right to select the third entry. Push the joystick up or down
to select the third and final digit. The character being entered will flash and the first and
second characters entered will remain lit. You are now ready to enter the 3-digit
password.
253
20.9%
29
12. Push the joystick in the center to enter the password. If you entered it correctly the
display will scroll “New Password Entry OK”.
…New Password Entry OK…
20.9%
NOTE: If on the second entry the password entered was not the same as the first, the
display will take you back to the “Re-enter Password Screen”. You’ll need to repeat steps 2
through 11. If you do not enter the password correctly, the monitor remembers the last
password that was properly input.
If you misplace or lose your password, contact CONCOA with the monitors DTM# for
instructions on recovering your password. The DTM# is displayed by moving the
joystick to the left.
5.4.1 Enable User Password
This menu permits the user to activate or disable the password function on the
Oxygen monitor. Push the joystick down. “Enable User Password” will scroll on
the first line of the digital display
…Enable User Password…
20.9%
Push the joystick right to display the status. If enabled it will display “Enabled”
Enabled
20.9%
Push the joystick up or down to change the status. Once enabled or disabled is
selected, push the joystick in the center to enter the new status. If entered correctly
the display will scroll “Enable User Password”
…Enable User Password…
20.9%
30
5.5 Entering the Menus
The O2 monitor is supplied with main menus with sub menus to adjust mA outputs, alarm relay
settings, sensor adjustments and zero suppression for toxic and corrosive gas sensor cells.
5.5.1 Set 4-20mA loop
.Set 4-20mA loop..
20.9%
This main menu will permit the adjusting of the 4mA and 20mA output from the O2
Monitor. It also provides a function that will send an actual output between 4mA and
20 mA to test any remote control and alarm system attached to the O2 monitor.
NOTE: To read the mA output, O2 monitor must either be connected to a remote
PLC controller or SCADA system. You can also connect the O2 monitor to a volt
meter to read the mA output. Please consult CONCOA for more information.
From this main menu, pushing the joystick to the right will select the sub menu and
the digital display will scroll the following:
..Set 4mA zero…
20.9%
This is the menu at which to adjust the 4mA output being sent from the O2 Monitor.
To change this value, push the joystick right to display the 4 mA setting. The display
will indicate a value between 0 and 255 counts. Pushing the joystick up increases the
value and pushing the joystick down decreases the value. The 4mA output being sent
from the O2 monitor will change as the number on the digital display changes. Press
ENTER to accept the value.
255
20.9%
Push the joystick to the left brings you back to the pervious Main menu. The digital
display will scroll the following:
...Set 4mA zero…..
20.9%
Push the joystick down to access the next sub menu; Set 20mA Span will scroll.
...Set 20mA Span…
20.9%
This is the menu at which to adjust the 20mA output being sent from the O2 Monitor.
31
To change this value, push the joystick right to display the 20mA span setting. The
display will indicate a value between 0 and 255 counts. Pushing the joystick up
increases the value and pushing the joystick down decreases the value. The 20mA
output being sent from the O2 monitor will change as the number on the digital
display changes. Press ENTER to accept the value.
255
20.9%
Push the joystick to the left brings you back to the pervious Main menu. The digital
display will scroll the following:
...Set 20mA span…..
20.9%
Push the joystick down to access the next sub menu; Force loop will scroll.
.…Force Loop….
20.9%
NOTE: The Force Loop function is not available on the O2 monitor. It was
designed for toxic and corrosive gases.
This is the sub menu is only used on CONCOA’s toxic and corrosive monitors.
…Not Available..
20.9%
Push the joystick to the left brings you back to the pervious menu. The digital display
will scroll the following:
...Force Loop…..
20.9%
NOTE: When adjusting the 4 mA and 20mA settings, the actual reading may
quickly switch from your setting and an alternate number. This is a run time
indication and is normal.
5.5.2 Set Formats
This is the menu at which to adjust the relay states for the two gas alarm relays and
the individual instrument fault relay.
NOTE: The O2 system must have the relay module installed to access this menu. If
no relay module is installed the display will indicate N/A, (not available)
32
Push the joystick down to access the next main menu, Set Formats. The display will
scroll the following:
…Set Formats…
20.9%
This menu will permit the setting of the two alarm relays and the fault relay settings
from normally de-energized state, Normal, to normally energized state, Inverted.
From this main menu, pushing the joystick to the right will select the sub menu and
the digital display will scroll the following:
..Format Relay 1…
20.9%
This is the menu at which to adjust the first level alarm relay state on the O2 Monitor.
To change this value, push the joystick right to display the relay state. The display
will indicate INVERT. Pushing the joystick down will change the relay state from
INVERT to NORMAL. Press ENTER to accept the value.
INVERT
20.9%
NORMAL
20.9%
After entering the relay state the display will default back to the Set Formats menu.
The display will scroll the following:
..Set Formats…
20.9%
From this main menu, pushing the joystick to the right will select the sub menu and
the digital display will scroll the following:
..Format Relay 1…
20.9%
Push the joystick down to access the next main menu, Set Formats. The display will
scroll the following:
… Format Relay 2..
20.9%
33
This is the menu at which to adjust the second level alarm relay state on the O2
Monitor.
To change this value, push the joystick right to display the relay state. The display
will indicate INVERT. Pushing the joystick down will change the relay state from
INVERT to NORMAL. Press ENTER to accept the value.
INVERT
20.9%
NORMAL
20.9%
After entering the relay state the display will default back to the Set Formats menu.
The display will scroll the following:
..Set Format …
20.9%
From this main menu, pushing the joystick to the right will select the sub menu and
the digital display will scroll the following:
..Format Relay 1…
20.9%
Push the joystick twice to select the fault relay to be adjusted. The display will scroll;
Format Fault Relay.
..Format Fault Relay...
20.9%
20.9% pushing the
This is the menu at which to adjust the fault alarm relay state on the
right will select
Monitor.
O2joystick
To change this value, push the joystick right to display the relay state. The display
will indicate INVERT. Pushing the joystick down will change the relay state from
INVERT to NORMAL. Press ENTER to accept the value.
34
INVERT
20.9%
NORMAL
20.9%
After entering the relay state the display will default back to the Set Formats menu.
The display will scroll the following:
..Set Formats...
20.9
5.5.3 Set Alarm Threshold Polarity
Alarm Threshold Polarity determines if an alarm concentration is set above or
below a threshold value. For example, if an alarm of 19.0% for Oxygen is
selected, the Alarm Threshold Polarity must be set to Invert for the monitors
alarm to activate when the reading goes below 19.0%. For toxic and corrosive
gases selecting a Normal setting for the Alarm Threshold Polarity means that the
system will alarm when the gas concentration exceeds, goes above, an alarm set
point. This menu will permit the selection of the alarm polarity. To access this
menu from the “Set Formats” menu, push the joystick down to display the Set
Alarm Threshold Polarity adjustment menu. This will scroll on the digital
display.
..Set Alarm Threshold Priority..
20.9%
Push the joystick right to access the first sub menu; Set Alarm 1 Polarity will
scroll on the display. This is the menu at which to adjust the first level alarm
polarity state on the O2 Monitor.
..Set Alarm 1 Polarity...
20.9%
To change this value, push the joystick right to display the relay state. The
display will indicate INVERT. Pushing the joystick down will change the relay
state from INVERT to NORMAL. Press ENTER to accept the value.
INVERT
20.9%
NORMAL
20.9%
35
After entering the relay state the display will default back to the Set Alarm 1
Polarity menu. The display will scroll the following:
..Set Alarm Polarity..
20.9%
Push the joystick down to access the next sub menu; Set Alarm 2 Polarity will
scroll on the display. This is the menu at which to adjust the second level alarm
polarity state on the O2 Monitor.
..Set Alarm 2 Polarity ..
20.9%
To change this value, push the joystick right to display the relay state. The
display will indicate INVERT. Pushing the joystick down will change the relay
state from INVERT to NORMAL. Press ENTER to accept the value.
INVERT
20.9%
NORMAL
20.9%
After entering the relay state the display will default back to the Set Relay 2
Alarm Threshold menu. The display will scroll the following:
..Set Alarm 2 Polarity..
20.9%
Push the joystick down to access the next sub menu; Set Audio Alarm Polarity
will scroll on the display. This is the menu at which to adjust the second level
alarm polarity state on the O2 Monitor.
..Set Audio Alarm Polarity...
20.9%
NOTE: The O2 system must have the audio alarm option module installed to
access this menu. If this option is installed the display will indicate N/A,
(not available)
36
NOTE: The built-in horn is designed to operate in only one alarm mode.
It will activate in either a decreasing alarm or an increasing alarm
mode only.
To change this value, push the joystick right to display the relay state. The
display will indicate INVERT. Pushing the joystick down will change the relay
state from INVERT to NORMAL. Press ENTER to accept the value.
INVERT
20.9%
NORMAL
20.9%
After entering the relay state the display will default back to the Set Audio Alarm
Polarity menu. The display will scroll the following:
..Set Audio Alarm Polarity...
20.9%
5.5.4 Set Latching
This is the menu at which to adjust the relay alarm state for the two gas alarm
relays and the individual instrument fault relay. The selection permits setting the
relays to a latching or non-latching state. In a latching state, the relay will remain
activated until the user manually selects the Enter Key. In a non-latching state, the
alarm relay will automatically reset once the gas concentration has returned to
20.9% for oxygen.
NOTE: The O2 system must have the relay module installed to access this menu.
If no relay module is installed the display will indicate N/A, (not
available)
...Set Latching…
20.9%
This menu will permit the setting of the two alarm relays and the fault relay
settings from a latching to a non-latching state when they are activated.
From this main menu, pushing the joystick to the right will select the sub menu
and the digital display will scroll the following:
..Set Latching Relay 1…
20.9%
37
This is the menu at which to adjust the first level alarm relay state on the O2
Monitor.
To change this value, push the joystick right to display the relay state. The
display will indicate LATCH. Pushing the joystick down will change the relay
state from LATCHING to NON-LATCHING. Press ENTER to accept the value.
LATCHING
20.9%
NONLATCH
20.9%
After entering the relay state the display will default back to the Set Latching
menu. The display will scroll the following:
..Set Latching.…
20.9%
From this main menu, pushing the joystick to the right will select the sub menu
and the digital display will scroll the following:
..Set Latching Relay 1…
20.9%
Push the joystick down to select the next relay to be adjusted. The display will
scroll the following, Set Latching Relay 2.
..Set Latching Relay 2…
20.9%
This is the menu at which to adjust the second level alarm relay state on the O2
Monitor.
To change this value, push the joystick right to display the relay state. The
display will indicate LATCHING. Pushing the joystick down will change the
relay state from LATCHING to NONLATCH. Press ENTER to accept the value.
LATCHING
20.9%
NONLATCH
20.9%
38
After entering the relay state the display will default back to the Set Latching
menu. The display will scroll the following:
..Set Latching….
20.9%
From this main menu, pushing the joystick to the right will select the sub menu
and the digital display will scroll the following:
..Set Latching Relay 1…
20.9%
Push the joystick twice to select the Audio Alarm relay to be adjusted. The
display will scroll; Set Latching Audio Alarm.
..Set Latching Audio Alarm…
20.9%
This is the menu at which to adjust the Audio alarm relay state on the
O2 Monitor.
NOTE: The O2 system must have the audio alarm option module installed to
access this menu. If this option is installed the display will indicate N/A, (not
available)
To change this value, push the joystick right to display the relay state. The
display will indicate LATCHING. Pushing the joystick down will change the
relay state from LATCHING to NONLATCH. Press ENTER to accept the value.
LATCH
20.9%
NONLATCH
20.9%
After entering the fault relay state the display will default back to the Set
Latching menu. The display will indicate the following:
..Set Latching.…
20.9%
39
5.5.5 Resetting a Latching Alarm
To reset a latching alarm relay, you must enter the password correctly and then
push the joystick down to enter the reset command. The Oxygen monitor also has
an internal 2-pin terminal block for connecting a remote reset switch. (See Alarm
Relay board, section 1.2.7)
5.5.6 Set Alarm Delay
Push the joystick down to access the next main menu, Alarm Delay. The display
will scroll the following:
…Alarm Delay…
20.9%
This is the amount of time an alarm level concentration of oxygen must be present
before the instrument’s gas concentration alarm(s) will be activated. This menu
will permit setting a user selected time delay for activating alarm relays 1 and 2.
You can select from 0 seconds up to 255 seconds after an alarm level has been
exceeded before the alarm relays to activate.
To change this value, push the joystick right to display the time screen. The
display will indicate a value between 0 and 255 seconds. Pushing the joystick up
increases the value and pushing the joystick down decreases the value. Press
ENTER to accept the value.
005
20.9%
After entering the alarm delay, the display will default back to the Alarm Delay
menu and the display will scroll the following:
…Alarm Delay…
20.9%
NOTE: The alarm delay is only available for alarms 1 and 2. There is no delay for the
fault relay. Any system fault will immediately activate the Fault Relay.
5.5.7 Set Zero Suppression
This function not used on the Oxygen monitor. It is only used to decrease the
sensitivity of selected gas sensors. Although the menu permits the changing of
settings, it is totally disabled in the Oxygen monitor. The factory default is set at
000.
NOTE: This function is not available on the Oxygen monitor.
…Zero Suppression…
000
40
5.5.8 Set Alarm Thresholds
..Set Alarm Thresholds..
20.9%
This main menu will permit adjusting the oxygen concentration percentage that
will activate alarm levels 1 and 2. If the Audio alarm output module is installed,
it will also permit setting the level at which the audio alarm will activate.
NOTE: To activate the audio alarm, the O2 monitor must have the audio
alarm option.
From this main menu, pushing the joystick to the right will select the first sub
menu and the digital display will scroll the following: Set Relay 1 Alarm
Threshold.
..Set Relay 1 Alarm Threshold…
20.9%
This is the gas concentration at which the instrument’s first level alarm will be
activated. To change the displayed value, push the joystick to the right to display
the first level alarm setting. The display will indicate a value between 00.0% and
25.5%.
Pushing the joystick up increases the value and pushing the joystick down
decreases the value. Press ENTER to accept the value.
19.5%
20.9%
After entering the relay state the display will default back to the Set Relay 1
Alarm Threshold Menu. The display will scroll the following:
..Set Relay 1 Alarm Threshold…
20.9%
Push the joystick down to access the next sub menu; Set Relay 2 Alarm
Threshold, will scroll on the digital display.
..Set Relay 2 Alarm Threshold…
20.9%
This is the gas concentration at which the instrument’s second level alarm will be
activated. To change the displayed value, push the joystick to the right to display
the second level alarm setting. The display will indicate a value between 00.0%
and 25.5%.
Pushing the joystick up increases the value and pushing the joystick down
decreases the value. Press ENTER to accept the value.
41
18.0%
20.9%
After entering the relay state the display will default back to the Set Relay 2
Alarm Threshold Menu. The display will scroll the following:
..Set Relay 2 Alarm Threshold…
20.9%
Push the joystick down to access the next sub menu; Set Audio Alarm
Threshold, will scroll on the digital display.
..Set Audio Alarm Threshold…
20.9%
This is the gas concentration at which the instrument’s audio alarm will be
activated. To change the displayed value, push the joystick to the right to display
the second level alarm setting. The display will indicate a value between 00.0%
and 25.5%.
Pushing the joystick up increases the value and pushing the joystick down
decreases the value. Press ENTER to accept the value.
NOTE: The O2 system must have the audio alarm option module installed to access this
menu. If this option is installed the display will indicate N/A, (not available)
19.5%
20.9%
NOTE: The audio can be set into only one alarm level. You can choose between alarm
level 1 or alarm level 2 or set a completely different setting.
After entering the relay state the display will default back to the Set Audio
Threshold. Menu. The display will scroll the following:
..Set Audio Alarm Threshold…
20.9%
42
5.5.9 Set Alarm Hysteresis
CONCOA’s oxygen monitor may be used as a control system. When used to
regulate oxygen levels the need of a dead band, “hysteresis” may be required for
the alarm relays. This menu will permit the setting of the alarm hysteresis to a
desired concentration of Oxygen. When using hysteresis, the alarm set point now
becomes an average alarm setting for an action to occur. When adding the
hysteresis value to the alarm set point, this then defines the alarm and dead band
for an action to occur.
For example, if you require a valve to close at 14.9% oxygen level and to reopen
again at 15.5% oxygen level, you would set the Alarm Threshold at 15.2% and set
the hysteresis value at 0.3%.
Average Alarm set point = 15.2% - Hysteresis 0.3% = 14.9%, Valve Off
Average Alarm set point = 15.2% + Hysteresis 0.3% = 15.5%, Valve On
To access this menu push the joystick down to display the Set Alarm Hysteresis
menu. This will scroll on the digital display.
..Set Alarm Hysteresis…
20.9%
Push the joystick right to access the Set Alarm 1 Hysteresis. Pushing the joystick
again to the right will display a value 0.0%, (factory default). Pushing the
joystick up increases the percentage up to a maximum value of 2.5%. Adjust the
digital display until the desired hysteresis value is selected.
0.3%
20.9%
Press ENTER to accept this value. The digital display will revert back to Set
Alarm 1 Hysteresis.
..Set Alarm 1 Hysteresis…
20.9%
Push the joystick down to access the next sub menu; Set Alarm 2 Hysteresis will
scroll on the digital display. Pushing the joystick again to the right will display a
value 0.0%. Pushing the joystick up increases the percentage up to a maximum
value of 2.5%. Adjust the digital display until the desired hysteresis value is
selected.
..Set Alarm 2 Hysteresis…
20.9%
43
Press ENTER to accept this value. The digital display will revert back to Set
Alarm 2 Hysteresis.
..Set Alarm 2 Hysteresis…
20.9%
Push the joystick down to access the next sub menu; Set Alarm Audio
Hysteresis will scroll on the digital display. Pushing the joystick again to the
right will display a value 0.0%. Pushing the joystick up increases the percentage
up to a maximum value of 2.5%. Adjust the digital display until the desired
hysteresis value is selected.
..Set Audio Alarm Hysteresis…
20.9%
5.5.10 Set Sensor Adjust
This menu will permit fine-tuning of the oxygen readout to a known concentration
of Oxygen. It is recommended to adjust the oxygen display to ambient oxygen
levels of 20.9%. To access this menu push the joystick down to display the
Sensor Adjustment menu. This will scroll on the digital display.
NOTE: It is recommended to warm up the Oxygen monitor for two hours
before making any adjustments to the sensor.
...Sensor Adjustment…
20.9%
Push the joystick right to access the first sub menu; Set Sensor Span will scroll
on the display. This is the menu that will permit fine adjustment of the ambient
oxygen reading to 20.9%.
...Set Sensor Span...
20.9%
Push the joystick right to access the sensor span. The display will indicate a value
between 0 and 255 counts. Pushing the joystick up increases the counts and
decreases the percent oxygen value displayed on the monitor. Pushing the
joystick down decreases the counts and increases the oxygen value displayed on
the Monitor. As the counts increase and decrease the percent oxygen displayed
will also increase and decrease. Adjust the digital display until 20.9% + / - 0.1%
is displayed. The actual oxygen reading will fluctuate from 20.8% to 21.0%.
093
20.9%
44
Press ENTER to accept this value. The digital display will revert back to Set
Sensor Span.
...Set Sensor Span…
20.9%
..Sensor Adjustment..
20.9%
Press the joystick to the left to revert back to the Sensor Adjustment menu.
NOTE: The “Set Module Zero” menu is not available for the Oxygen monitor. This
menu was designed for CONCOA toxic and corrosive gas monitors.
When selected, nothing will happen. Push the joystick Left to leave this
menu.
5.5.11 Main Operation Mode
To select the main menu from any sub menu, push the joystick left until the Main
Menu appears. The digital display will indicate the following:
Oxygen
20.9%
45
6: Maintenance & Sensor Verification
Only qualified personnel should perform maintenance and sensor verification
6.1 Sensor Verification
The earth is a wonderful source of calibrated oxygen at 20.9%, therefore under
ambient conditions; verification of the O2 monitor to 20.9% oxygen is constantly
being performed. As the oxygen sensor ages over time, it may require a slight
adjustment to 20.9%. The O2 monitor also requires periodic testing with nitrogen
to verify the cells response to 0% oxygen.
6.1.1 Sensor Verification Gas
For testing the O2 monitor, CONCOA recommends the use of
nitrogen. This can be purchased from your gas supplier or from CONCOA
Monitoring Systems.
6.1.2 Sensor Verification Equipment
The following equipment is available from CONCOA to facilitate gas calibration:
Part Number
Description
Quantity
CONCOA
Nitrogen 103 liter cylinder, 99.99%
580 3007
1
CONCOA
Regulator, Model 715 500 cc per minute flow
580 3008
1
NOTE: If the instrument is connected to a controller, set the controller to the standby
mode to avoid accidental alarms.
NOTE: If your safety protocol requires, you may subject the
monitor to different concentrations of oxygen span gas.
*Air Liquide can be reached at 800-638-1197
46
6.2 Sensor Verification Procedure
CAUTION: Be sure to observe all safety guidelines when generating and
using nitrogen.
Under ambient non-oxygen deficient environments, O2 monitor will indicate
a display reading of 20.9%. As the sensor ages, the reading may decrease in
value. The following procedure should be used to adjust the reading to
20.9%.
1) Insure that the O2 monitor is in a clean non-oxygen deficient
environment.
2) Enter the password. Refer to Section 5.3
3) Select the Sensor Adjust menu.
This menu will permit fine-tuning of the oxygen readout to a known concentration
of Oxygen. It is recommended to adjust the oxygen display to ambient oxygen
levels of 20.9%. To access this menu push the joystick down to display the
Sensor Adjustment menu. This will scroll on the digital display.
NOTE: It is recommended to warm up the Oxygen monitor
for two hours before making any adjustments to the sensor.
..Sensor Adjustment…
20.9%
Push the joystick right to access the first sub menu; Set Sensor Span will scroll
on the display. This is the menu that will permit fine adjustment of the ambient
oxygen reading to 20.9%.
Push the joystick right to access the first sub menu; Set Sensor Span will scroll
on the display. This is the menu that will permit fine adjustment of the ambient
oxygen reading to 20.9%.
..Set Sensor Span..
20.9%
Push the joystick right to access the sensor span. The display will indicate a value
between 0 and 255 counts. Pushing the joystick up increases the counts and
decreases the percent oxygen value displayed on the Monitor. Pushing the
joystick down decreases the counts and increases the oxygen value displayed on
the Monitor. As the counts increase and decrease the percent oxygen displayed
will also increase and decrease. Adjust the digital display until 20.9% + / - 0.2%
is displayed.
47
093
20.9%
Press ENTER to accept this value. The digital display will revert back to Set
Sensor Span.
..Set Sensor Span..
20.9%
Press the joystick to the left to revert back to the Sensor Adjustment menu.
…Sensor adjustment..
20.9%
6.2.1 Sensor Verification to Nitrogen
CONCOA recommends challenging the O2 monitor with nitrogen every 6 to 12
months. The sensor protector has a ¼” male tube fitting designed for connecting
sample tubing from a Nitrogen cylinder. Expose the O2 cell to N2 at a flow rate of
500 cc/min. The reading will drop off to 1% or below in less than one minute
when the O2 sensor is exposed to pure N2. The system will recover to 20.9%
when the nitrogen is removed.
NOTE: The Sensor Protector has four air relief holes that will prevent the complete
exposure of nitrogen to the oxygen sensor. To see a true zero oxygen level,
the entire O2 monitor needs be completely immersed into a zero oxygen
environment. Covering the holes will help to prevent dilution of the span gas
to ambient air.
6.2.2 Sensor Verification to a known concentration of Oxygen
When testing the O2 monitor to a known concentration of oxygen, the sensor inlet
has a ¼” compression tube fitting designed for connecting the dust filter. You can
connect ¼” OD sample tubing from a Nitrogen cylinder directly to the dust filter.
Expose the O2 cell directly from the nitrogen cylinder at a flow rate of 500
cc/min. The reading will drop off to the span gas concentration in less than 1
minute. The final reading should be within ± 0.3% of the span gas concentration.
To see the exact span gas concentration the entire O2 monitor needs to be
completely immersed into a the span gas environment.
NOTE: The Oxygen monitor should be tested in an upright position to allow the span gas
to fully saturate the sensor cell.
CAUTION: For best results the Oxygen monitor should be protected from wind and high
airflow when gas calibrating with test gas.
48
NOTE: To see a true zero, the entire O2 monitor needs be completely immersed into a
zero oxygen environment.
NOTE: When calibrating the TX-1100-DRAP Oxygen monitor for glove box, the sensor
cell is recessed inside the sensor protector. To obtain an accurate reading the
entire sensor protector MUST be fully exposed to the span gas.
O2 monitor
Connected to gas cylinder
49
7.0 Appendix
Remote Display for Oxygen monitor (part number DPM942-R)
This optional Remote display is designed to send remote oxygen
concentration information from any of CONCOA’ oxygen monitors. All
CONCOA O2 monitors have a built in 4-20mA output and the remote display
easily connects to the monitor’s input power and mA output connection. An
18 AWG, two conductor, stranded control and instrumentation cable, Belden
8461 or equivalent is recommended for the connection. The maximum
permissible cable length is 250 feet. You can connect up to two remote
displays to one Air Check Oxygen monitor.
NOTE: When connecting two remote displays, they must be connected to the Oxygen
monitor in series.
NOTE: To make fine adjustments to the display, carefully turn the span potentiometer to
match the reading on the Oxygen monitor.
DPM942-R
CAUTON
DO NOT CONNECT THE
DISPLAY DIRECTLY TO
THE 24VDC Supply
Please verify wiring to the
display before powering
the O2 monitor.
- Common
mA
mA to I+
Do Not connect
to LP- or LP+
Common to I-
18 AWG, two conductor,
stranded control and
instrumentation cable, Belden
8461 or equivalent
Max distance 250 feet
50
Oxygen Main Power Board
Common
T1073-P5P-ND Power supply
115 VAC / 24 VDC 1 amp
Regulated power supply
+24VDC
18 AWG, two conductor,
stranded control and
instrumentation cable, Belden
8461 or equivalent
CONCOA
NC Common NO
580 3006
+
Alarm 2
+
-
-
-
Alarm 1
Oxygen
Fault
Relay Board
This drawing shows how to connect a remote Horn
and strobe to CONCOA’s Oxygen monitor with the
Alarm relay #1 set to a Normally Open position.
51
-
How to connect a remote fan contactor to the O2 monitor
To external voltage
source, 24 VAC, 120
VAC or 240 VAC, 3
amps max.
Externally powered
relay
Relay 1, or Relay 2
Terminal Strip
External relay coil.
Relay coil voltage
rating must match
external voltage
source.
COM
N/O
CAUTION: CONCOA Monitoring
Systems does not recommend
using 120VAC or higher voltage
inside the monitor. Use 24 VAC
if possible.
External relay using
internal 24 VDC power
supply
+24 VDC
Relay 1, or Relay 2
Terminal Strip
COM
External 24 VDC
relay coil. Install
1N4004 or similar
diode across coil.
N/O
-24 VDC
52
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53
Warranty Information
This equipment is sold by CONTROLS CORPORATION OF AMERICA under the warranties set forth in the
following paragraphs. Such warranties are extended only with respect to the purchase of this equipment directly
from CONTROLS CORPORATION OF AMERICA or its Authorized Distributors as new merchandise and are
extended to the first Buyer thereof other than for the purpose of resale.
For a period of one (1) year from the date of original delivery (90 days in corrosive service) to Buyer or to Buyer’s
order, this equipment is warrantied to be free from functional defects in materials and workmanship and to conform
to the description of this equipment contained in this manual and any accompanying labels and/or inserts, provided
that the same is properly operated under conditions of normal use and that regular periodic maintenance and service
is performed or replacements made in accordance with the instructions provided. The foregoing warranties shall not
apply if the equipment has been repaired: other than by CONTROLS CORPORATION OF AMERICA or a
designated service facility in accordance with written instructions provided by CONTROLS CORPORATION OF
AMERICA; or altered by anyone other than CONTROLS CORPORATION OF AMERICA; or if the equipment has
been operated under improper conditions or outside published specifications; or if the equipment has been damaged
or does not function due to improper installation, improper supply of required utilities, accident, abuse, misuse,
natural disaster, insufficient or excessive electrical supply, abnormal mechanical or environmental conditions, or
debris or particles in the gas or liquid source of supply.
CONTROLS CORPORATION OF AMERICA’s sole and exclusive obligation and Buyer’s sole and exclusive
remedy under the above warranties is limited to repairing using new or reconditioned parts or replacing, free of
charge except for labor if permanently installed for the continuous supply of gas by other than a technician certified
by CONTROLS CORPORATION OF AMERICA specifically to do so, at CONTROLS CORPORATION OF
AMERICA’s option, the equipment or part, which is either (1) reported to its Authorized Distributor from whom
purchased, and which if so advised, is returned with a statement of the observed deficiency, and proof of purchase of
equipment or part not later than seven (7) days after the expiration date of the applicable warranty, to the nearest
designated service facility during normal business hours, transportation charges prepaid, and which upon
examination, is found not to comply with the above warranties with return trip transportation charges for the
equipment or part paid by Buyer or (2) in the case of designated equipment permanently installed for the continuous
supply of gas, reported to an Authorized Service Center with proof of initial installation no later than seven (7) days
after the expiration date of the applicable warranty, and which is evaluated for compliance with the above warranties
by technician certified by CONTROLS CORPORATION OF AMERICA, and which is determined by CONTROLS
CORPORATION OF AMERICA based on said evaluation to be non-compliant.
CONTROLS CORPORATION OF AMERICA SHALL NOT BE OTHERWISE LIABLE FOR ANY
DAMAGES INCLUDING BUT NOT LIMITED TO: INCIDENTAL DAMAGES, CONSEQUENTIAL
DAMAGES, OR SPECIAL DAMAGES, WHETHER SUCH DAMAGES RESULT FROM NEGLIGENCE,
BREACH OF WARRANTY OR OTHERWISE.
THERE ARE NO EXPRESS OR IMPLIED WARRANTIES WHICH EXTEND BEYOND THE
WARRANTIES HEREINABOVE SET FORTH. CONTROLS CORPORATION OF AMERICA MAKES
NO WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE WITH
RESPECT TO THE EQUIPMENT OR PARTS THEREOF.
Controls Corporation of America
1501 Harpers Road • Virginia Beach, VA 23454
To Order Call1-800-225-0473 or 757-422-8330 • Fax 757-422-3125
www.concoa.com
55
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