ATI Technologies Q45D User manual

O & M Manual
Model Q45D/60
Portable Optical D.O.
Measurement System
Home Office European Office
Analytical Technology, Inc. ATI (UK) Limited
6 Iron Bridge Drive Unit 1 & 2 Gatehead Business Park
Collegeville, PA 19426 Delph New Road, Delph
Phone: [phone] Saddleworth OL3 5DE
610-917-0991 Phone: [phone]
Fax: [phone] Fax: + 44 (0)1457-874-468
Email: [email protected] Email: [email protected]

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Table of Contents
PART 1 - INTRODUCTION..................................4
1.1 General.......................................................4
1.2 Features......................................................5
1.4 Q45D/60 System Specifications ................6
1.5 Q45D Performance Specifications.............8
PART 2 –INSTRUMENT
HANDLE/MOUNTING..........................................9
2.1 General.......................................................9
2.2 Portable Handle .........................................9
PART 3 –ELECTRICAL CONNECTION..........10
3.1 General.....................................................10
3.2 Direct Sensor Connection........................10
3.3 Sensor Wiring..........................................11
PART 4 –OPTICAL D.O. SENSOR ...................13
4.1 General.....................................................13
4.2 Optical Sensing........................................14
PART 5 –CONFIGURATION.............................15
5.1 General.....................................................15
5.2 Battery / Power Circuit Board .................15
5.3 Battery Power Circuit Board....................17
5.4 Voltage Outputs.......................................17
5.5 Software Interface....................................18
5.51 Keys.........................................................19
5.52 Display.....................................................19
5.6 Software...................................................21
5.61 Software Navigation...............................21
5.62 Measure Menu [MEASURE]...................25
5.63 Calibration Menu [CAL] .....................26
5.64 Configuration Menu [CONFIG] .............27
5.65 Control Menu [CONTROL] ....................30
5.66 Diagnostics Menu [DIAG]..................31
PART 6 –CALIBRATION...................................34
6.1 General.....................................................34
6.11 D.O. Span Cal (1-spl) ..............................34
6.12 Dissolved Oxygen Air Span Cal (% sat)..36
6.13 Dissolved Oxygen Zero Cal.....................37
6.2 Temperature Calibration..........................39
PART 7 –SYSTEM MAINTENANCE ...............41
7.1 General.....................................................41
7.2 Analyzer Maintenance.............................41
7.3 Sensor Maintenance.................................41
PART 8 –TROUBLESHOOTING ......................42
8.1 General.....................................................42
8.2 External Sources of Problems..................42
8.3 Analyzer Tests .........................................43
8.31 Display Messages ....................................43
8.4 Sensor Tests.............................................46
SPARE PARTS......................................................49

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Table of Figures
FIGURE 1-PORTABLE W/HANDLE CONFIGURATION ..............................................................9
FIGURE 2-DIRECT SENSOR CONNECTION.........................................................................10
FIGURE 3-OPTICAL SENSOR WIRING................................................................................12
FIGURE 4-SUBMERSIBLE D.O. SENSOR ASSEMBLY...........................................................13
FIGURE 5-OPTICAL SENSING ELEMENT ............................................................................14
FIGURE 6-OPTIONAL DATALOGGER PCB CONNECTIONS ....ERROR!BOOKMARK NOT DEFINED.
FIGURE 7-USER INTERFACE............................................................................................18
FIGURE 8-SOFTWARE MAP .............................................................................................23
FIGURE 9-Q45D DISPLAY MESSAGES..............................................................................44
FIGURE 10 -PT100 RTD TABLE.......................................................................................46
FIGURE 11 -BAROMETRIC PRESSURE CONVERSION TABLE.................................................47
FIGURE 12 -OXYGEN SOLUBILITY TABLE...........................................................................48

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Part 1 - Introduction
1.1 General
The Model Q45D is a versatile on-line monitoring system designed for the
continuous measurement of dissolved oxygen in solution. The full scale
operating range of the system 0-40 ppm, and the sensing system will operate on
water streams with temperatures ranging from 0 to 50C.
While the Q45D may be used with either optical oxygen or galvanic membrane
sensors, this manual is specific for systems utilizing ATI’s optical D.O. sensor.
The system operates on two AA batteries, and will run continuously for
approximately 240 hours.
Warning: If unit is to be stored for more that 6 months REMOVE the
batteries from the holder to avoid potential damage from battery leakage.

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1.2 Features
•Standard Q45D/60 electronic transmitters are designed to be a fully isolated,
battery operated instrument. The monitor can be quickly converted to either a
loop power transmitter or line powered analyzer.
•High accuracy, high sensitivity system, measures from 0.1 ppm to 40.0 ppm
through 2 internal automatic ranges.
•Large, high contrast, custom LCD display with LED back light provides excellent
readability. The secondary line of display utilizes 5x7 dot matrix characters for
clear message display. Two of four measured parameters may be on the display
simultaneously. An LED backlight can be turned on if necessary for use in very
low light conditions.
•Diagnostic messages provide a clear description of any problem with no
confusing error codes to look up. Messages are also included for diagnosing
calibration problems.
•Quick and easy one-point calibration method, air calibration method, and sensor
zero-cal. To provide high accuracy, all calibration methods include stability
monitors that check temperature and main parameter stability before accepting
data.
•High accuracy three-wire Pt100 temperature input. Temperature element can be
user calibrated.
•Security lock feature to prevent unauthorized tampering with transmitter settings.
All settings can be viewed while locked, but they cannot be changed.

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1.4 Q45D/60 System Specifications
(Common to all variations)
Displayed Parameters Main input, 0.1 ppm to 40.0 ppm
%Saturation, 0 to 999.9%
Sensor temperature, -10.0 to 50.0°C (23 to 122ºF)
Sensor signal, -40 to +2000 mVDC
Loop current, 4.00 to 20.00 mA
Sensor slope/offset
Model number and software version
Main Parameter Ranges Manual selection of one of the following display ranges,
0.00 to 40.00 ppm
0.00 to 40.00 mg/l
0.0 to 999.9% Saturation
Display 0.75” (19.1 mm) high 4-digit main display with sign
12-digit secondary display, 0.3" (7.6 mm) 5x7 dot matrix.
Integral LED back-light for visibility in the dark.
Keypad 4-key membrane type with tactile feedback, polycarbonate
with UV coating
Enclosure: NEMA 4X, polycarbonate, stainless steel hardware,
weatherproof and corrosion resistant,
HWD: 4.4" (112 mm) x 4.4" (112 mm) x 3.5" (89 mm)
Mounting Options Handheld w/Nylon Carrying Strap
Conduit Openings Standard 3 –Pg9 openings with cordgrips
Optional ½” conduit adapters available
Weight 1 lb. (0.45 kg)
Ambient Temperature Analyzer Service, -20 to 60 °C (-4 to 140 ºF)
Sensor Service, -5 to 55°C (23 to 131 °F)
Storage, -30 to 70 °C (-22 to 158 ºF)
Ambient Humidity 0 to 95%, indoor/outdoor use, non-condensing to rated
ambient temperature range
Altitude Up to 2000 m (6562 ft)
Electrical Certification Ordinary Location, cCSAus (Certified to both CSA and UL
standards), pollution degree 2, installation category 2
EMI/RFI Influence Designed to EN 61326-1

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Output Isolation 600 V galvanic isolation
Filter Adjustable 0-9.9 minutes additional damping to 90% step
input
Temperature Input Pt1000 RTD with automatic compensation
Sensor Optical oxygen sensor utilizing fluorescence quenching
technology. Optical element life 3-5 years.
Sensor Materials Noryl, PVC, and stainless steel
Sensor Cable Submersible: 30 ft. (9.1 m)
Max. Sensor-to-Analyzer
Distance 200 feet (61 m), with junction box
Power Two generic AA alkaline batteries, low battery indication at
1.60 VDC.
Outputs Two 0-2.5 VDC isolated outputs are provided on for
connection to data recorders, etc.
Battery Life Approximately 240 hours of operational use on a set of
batteries (without backlight).

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1.5 Q45D Performance Specifications
(Common to all variations)
Accuracy 0.2% of selected range or better
Repeatability 0.05% of selected range or better
Sensitivity 0.05% of selected range
Non-linearity 0.1% of selected range
Warm-up Time 3 seconds to rated performance (electronics only)
Supply Voltage Effects ± 0.05% span
Instrument Response Time 120 seconds to 90% of step input at lowest damping

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Part 2 –Instrument Handle/Mounting
2.1 General
The Q45D/60 Portable Dissolved Oxygen System comes complete with a
specially designed handle that allows the system to be comfortably carried, or
quickly strapped to a railing. Although the system is designed to be a portable
system, it can be permanently mounted for longer term field use. This is
possible due to the very long battery life spans that can be achieved with the
system.
2.2 Portable Handle
A removable handle is included with each unit that provides not only comfortable
transportation of the system, but the integral locking strap allows the system to
be quickly mounted to pipes or rails for longer term use in one area.
Figure 1 - Portable w/Handle Configuration

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Part 3 –Electrical Connection
3.1 General
The sensor cable can be quickly connected to the Q45 terminal strip by matching
the wire colors on the cable conductors. A junction box is also available to
provide a quick-disconnect point for the sensor, or a break point for very long
sensor cable runs. Route signal cable away from AC power lines, adjustable
frequency drives, motors, or other noisy electrical signal lines. Do not run sensor
or signal cables in conduit that contains AC power lines or motor leads.
3.2 Direct Sensor Connection
The sensor cable should be routed into the enclosure through the right hand cord
grip on the bottom of the enclosure. Make sure the cord-grips are snugly
tightened after electrical connections have been made to prevent moisture
incursion. When stripping cables, leave adequate length for connections in the
transmitter enclosure, as shown below.
Figure 2 - Direct Sensor Connection
Once inside the enclosure, the individual colored sensor cable leads can be
connected directly to the SENSOR connection terminals by matching the wire
colors. On Q45D older systems, there may exist a YELLOW wire label on the
sensor terminal strip rather than the wire color ORANGE or BROWN, which are
used now. If your system has a YELLOW label, simply connect orange/brown
from the sensor to that point.

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3.3 Sensor Wiring
The sensor cable can be quickly connected to the Q45 terminal strip by matching
the wire colors on the cable to the color designations on the label in the monitor.
A junction box is also available to provide a break point for long sensor cable
runs. Route signal cable away from AC power lines, adjustable frequency drives,
motors, or other noisy electrical signal lines. Do not run sensor or signal cables
in conduit that contains AC power lines or motor leads.
WIRING NOTE: The cable for the optical D.O. sensor contains a “black” wire that is
actually a black shrink tube covering both a blue and a pink wire.
These two wires connect to the same point designated by black in
Figure 3. If the cable is cut to a shorter length, be sure that both
wires are connected to the terminal marked black.
A yellow and a gray wire are contained in the cable and are covered to
avoid shorting. If the cable length is changed, do not strip these two wires.
If possible, leave sensor cable uncut to avoid problems.

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
 

 

  



Figure 3 - Optical Sensor Wiring

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Part 4 –Optical D.O. Sensor
4.1 General
Optical D.O. sensors are supplied complete and ready to use. All that’s needed
is to make the proper sensor connections as shown in the previous section.
A rubber boot protects the end of the sensor in transit. Leave the protective boot
in place until the sensor is to be placed into operation. Removal of the protective
boot prior to submergence may expose the sensing element to mechanical
damage that is not covered by warranty.
Figure 4 - Submersible D.O. Sensor Assembly

ATI Q45D-ODO Optical D.O. System Part 4–Optical D.O. Sensor
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4.2 Optical Sensing
Optical D.O. measurement employs a technique called “fluorescence quenching”
in order to measure molecular oxygen. The sensor will respond to oxygen either
in the air or dissolved in water.
A polymer element at the end of the sensor contains an embedded fluorescent
dye. When the element is exposed to a pulse of light from an internal LED, the
material in the polymer will fluoresce, or emit light at another wavelength. This
light decreases (or is quenched) at a rate proportional to the amount of oxygen in
the polymer. The monitor measures the rate at which this quenching occurs and
calculates the oxygen concentration based on the measurement.
Optical oxygen sensors provide the ability to measure oxygen in stagnant water,
and are not affected by certain kinds of non-biological coatings. However, optical
sensors are affected by biologically active coatings and must be kept clean. In
activated sludge applications, biological films can have a much lower D.O.
concentration on the sensor side of the film than on the bulk solution side. The
automatic air cleaning system integrated into the Q45D system will eliminate
coating problems by cleaning the sensor on a regular programmed schedule.
Figure 5 - Optical Sensing Element

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Part 5 –Configuration
5.1 General
To turn the system ON, simply press and hold the MENU key for approximately 5
seconds and the display will come on. To turn the unit off, press and hold the
ENTER key until the display shuts off (about 3 seconds). Note that the unit
must be in the MEASURE menu in order for the 3-second key press to
operate. The instrument will turn off automatically after 30 minutes if no keys are
pressed –optimizing battery life. This mode of operation is ideal for portable
operation where intermediate readings are being taken. Assuming the instrument
is used perhaps an hour per day, this would result in a battery lifespan of about
240 hours. For continuous operation with no automatic shut-off, turn the Auto-
OFF feature to OFF in the DIAG menu. This mode is intended for use when the
instrument outputs are used for transmitting data. In this mode, the instrument
will run continuously until the battery reaches the shut-down level (1.6V). It
should be noted that rechargeable AA batteries reduce operational times
dramatically, as they typically contain much less energy than standard batteries.
The PWR switch disconnects the AA batteries and is only used to disconnect the
battery if the system is not to be used for a long period of time (> 3 months of
storage). Otherwise, leave this switch in the ON position. The red dip switch is
only for factory use.
The "B" will flash on the display next to the main measurement indication when
the instrument requires battery replacement. If the battery is not replaced,
eventually the unit may not turn on in the normal operating mode. Once the low
battery condition is indicated, the instrument will only stay powered for 10
minutes.
5.2 Battery / Power Circuit Board
Q45ODO monitors are powered by internal AA alkaline batteries Figure 5 shows
this board assembly with batteries installed.
The battery circuit board contains 3 switch assemblies as shown in the drawings.
.

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(REAR OF ENCLOSURE)
DC BATTERY BOARD
POWER CABLE
Figure 6 - Battery Board Connections
The first (S1) is an On/Off slide switch. This switch must be in the ON position
for operation. Turn it to OFF if you do not intend to operate the monitor in the
next week or two.
The second switch assembly (S2) contains two switches, the one on the left
marked LOCK and the one on the right marked MODE. The function of these
two slide switches are as follow:
LOCK This switch is used to define how the monitor will turn on and off.
This switch is normally in the OFF position. With the lock switch
off, the monitor will be turned on manually using the MENU key on
the front of the monitor. With the lock switch in the ON position, the
monitor will always be on when there is enough power to run the
monitor. The ON position is normally used when operating from an
external power supply intended for continuous operation.

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MODE This switch is used to set the voltage at which monitor will shut off
when powered by internal batteries. Alkaline batteries can normally
be run down to about 0.8 volts. When using alkaline batteries, the
mode switch is in the OFF position (factory default). If
rechargeable NiMH batteries are substituted, place the MODE
switch in the ON position. Note that rechargeable NiMH batteries
have only about 35% of the capacity of an alkalines. However,
NiMH batteries can be recharged hundreds of times.
The third switch assembly is a single slide switch (S3) which
defines whether the 0-2.5 VDC signals from the monitor are
isolated or non-isolated. Output isolation is not required when
outputs are connected to the internal data logger. However, if the
outputs are connected to external devices through the external
connection cable, putting this switch in the ISO position will protect
against possible ground loops. The isolation circuit will slightly
increase the power requirement for the monitor, resulting in a bit
less battery life.
5.3 Battery Power Circuit Board
The Q45 portable instrument is primarily operated by software settings.
However, there are also a few hardware details on the battery circuit board to
note.
The battery board is a circuit board that sits in the rear of the Q45 enclosure, and
connects to the Q45 AUX port through a ribbon cable. The battery board
contains the battery clip for the two AA batteries and the output terminal strip for
the two 0-2.5 VDC outputs. Along the left side below the ribbon cable is an
ON/OFF slide switch. This switch can be used to turn the instrument completely
OFF when not intending to use the unit for an extended period.
5.4 Voltage Outputs
There are two sets of analog voltage outputs on the datalogger terminal strip that
may be used to send isolated data back to remotely located recorders, PLC’s,
etc. Output #1 is used only for dissolved oxygen information, and Output #2 can
be used for an additional dissolved oxygen output channel, or it can be selected
to output temperature information.

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5.5 Software Interface
The user interface for the Q45 Series instrument consists of
a custom display and a membrane keypad. All functions are
accessed from this user interface (no internal jumpers, pots,
etc.).
When power is first applied, you may notice that the display
does not come on immediately. This is normal. There is a 5
second start routine that runs before the display illuminates.
In addition, you will notice an occasional “flicker” of the
display, occurring about twice an hour. This is the result of a
display processor refresh program that insures long-term
display integrity, and will always occur during normal
operation of the instrument.
Figure 7 - User Interface
MENU ICONS
UNITS
12-CHARACTER
SECONDARY
DISPLAY
MEMBRANE
KEYPAD
MENU
ESC ENTER
A
B
DIAG
FAIL
HOLD
CAL
CONF
MENU ICONS
UNITS
12-CHARACTER
SECONDARY
DISPLAY
MEMBRANE
KEYPAD
ENTER KEY
LEFT ARROW
KEY
4-DIGIT
MAIN DISPLAY
MENU/ESCAPE
KEY
UP ARROW
KEY
SIGN
RELAY/LO-BAT
INDICATOR
4-KEY USER
INTERFACE
RELAY
INDICATOR

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5.51 Keys
All user configurations occur through the use of four membrane keys. These
keys are used as follows:
MENU/ESC To scroll through the menu section headers or to escape
from anywhere in software. The escape sequence allows
the user to back out of any changes in a logical manner.
Using the escape key aborts all changes to the current
screen and backs the user out one level in the software tree.
The manual will refer to this key as either MENU or ESC,
depending upon its particular function. In the battery-
powered version of the Q45, this is also the ON button.
UP (arrow) To scroll through individual list or display items and to
change number values.
LEFT (arrow) To move the cursor from right to left during changes to a
number value.
ENTER To select a menu section or list item for change and to store
any change.
5.52 Display
The large custom display provides clear information for general measurement
use and user configuration. There are three main areas of the display: the main
parameter display, the secondary message line, and the icon area.
Main Parameter During normal operation, the main parameter display
indicates the present process input with sign and units. This
main display may be configured to display any of the main
measurements that the system provides. During
configuration, this area displays other useful set-up
information to the user.

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Lower Line During normal operation, the lower line of the display
indicates user-selected secondary measurements that the
system is making. This also includes calibration data from
the last calibration sequence and the transmitter model
number and software version. During configuration, the
lower line displays menu items and set-up prompts to the
user. Finally, the lower line will display error messages
when necessary. For a description of all display messages,
refer to Section 8.31 Display Messages.
Icon Area The icon area contains display icons that assist the user in
set-up and indicate important states of system functions.
The CAL, CONFIG, and DIAG icons are used to tell the user
what branch of the software tree the user is in while scrolling
through the menu items. This improves software map
navigation dramatically. Upon entry into a menu, the title is
displayed (such as CAL), and then the title disappears to
make way for the actual menu item. However, the icon stays
on.
HOLD The HOLD icon indicates that the current output of the
transmitter has been put into output hold. In this case, the
output is locked to the last input value measured when the
HOLD function was entered. HOLD values are retained
even if the unit power is cycled.
FAIL The FAIL icon indicates that the system diagnostic function
has detected a problem that requires immediate attention.
This icon is automatically cleared once the problem has
been resolved.