ATI Technologies Q45P User manual

O & M Manual
Model Q45P
Portable pH
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
1.3 Q45P System Specifications......................6
1.4 Q45P Performance Specifications .............7
PART 2 –INSTRUMENT
HANDLE/MOUNTING..........................................8
2.1 General.......................................................8
2.2 Portable Handle .........................................8
PART 3 –SENSOR ELECTRICAL
INSTALLATION.....................................................9
3.1 General.......................................................9
3.2 Direct Sensor Connection..........................9
3.3 Combination Electrode Connection.........11
3.4 External Temperature Compensation ......12
PART 4 –CONFIGURATION.............................13
4.1 General.....................................................13
4.2 Battery / Power Circuit Board .................13
4.3 Battery Power Circuit Board....................15
4.4 Voltage Outputs.......................................15
4.5 User Interface...........................................16
4.51 Keys.....................................................17
4.52 Display.................................................17
4.6 Software...................................................19
4.7 Software Navigation...........................19
4.8 Measure Menu [MEASURE]...............22
4.9 Calibration Menu [CAL] ..........................23
4.10 Configuration Menu [CONFIG] .........24
4.11 Control Menu [CONTROL] ...............27
4.12 Diagnostics Menu [DIAG].........................28
PART 5 –CALIBRATION...................................31
5.1 Overview and Methods............................31
5.11 Sensor Slope ........................................31
5.12 Sensor Offset .......................................32
5.13 2-Point Calibration Explained .............32
5.14 1-Point Calibration Explained .............32
5.2 Performing a 2-Point Calibration.............32
5.3Performing a 1-Point Calibration.............34
5.4 Temperature Calibration..........................36
PART 6 –SYSTEM MAINTENANCE ...............37
6.1 System Checks.........................................37
6.2 Instrument Checks ...................................37
6.3 Display Messages ....................................38
PART 7 –MAINTENANCE AND
TROUBLESHOOTING........................................41
7.1 Cleaning the Sensor.................................41
7.2 Replacing the Saltbridge and Reference
Buffer Solution ....................................................42
7.3 Troubleshooting.......................................43
SPARE PARTS......................................................45

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Table of Figures
FIGURE 1-PORTABLE HANDLE -VIEWS ........................................................................................ 8
FIGURE 2-BULKHEAD CONNECTION............................................................................................. 9
FIGURE 3-SENSOR CONNECTION ...............................................................................................10
FIGURE 4-SENSOR CONNECTIONS,COMBINATION ELECTRODES..................................................11
FIGURE 5-EXTERNAL TEMPERATURE COMPENSATION .................................................................12
FIGURE 6-BATTERY BOARD CONNECTIONS.................................................................................14
FIGURE 7-USER INTERFACE.......................................................................................................16
FIGURE 8-SOFTWARE MAP ........................................................................................................21
FIGURE 9-AUTOMATIC PHBUFFER TABLES.................................................................................27
FIGURE 10 -REPLACING THE SALTBRIDGE AND REFERENCE BUFFER.............................................42

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Part 1 - Introduction
1.1 General
The Model Q45P pH monitor provides an extremely versatile measurement
system for monitoring/recording of pH over the range of 0.00 to 14.00 pH.
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.
The Q45P displays pH, sensor temperature, sensor output millivolts, and output
mV signals on the secondary line of the custom display. The instrument may be
used with either the high performance Q25 series sensors or with combination-
style electrodes.

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1.2 Features
•Standard Q45P electronic transmitters are designed to be a fully isolated, battery
powered instrument. The monitor can be quickly converted to either a loop
power transmitter or line powered analyzer.
•Two 10-bit, isolated, 0-2.5 VDC analog outputs may be configured to track pH
and temperature, or pH and pH. Both analog outputs can be individually
programmed to specific ranges.
•Large, high contrast, custom Super-Twist display 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 back light can be turned on if necessary for use in very
low light conditions.
•Sensor diagnostics monitor glass breakage, sensor leaks, and RTD condition.
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 two-point and sample calibration methods include auto-buffer
recognition from 3 built-in buffer tables. To provide high accuracy, all calibration
methods include stability monitors that check temperature and main parameter
stability before accepting data.
•Selectable Pt1000 or Pt100 temperature inputs. Systems can also be hard-
configured for three-wire elements. 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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1.3 Q45P System Specifications
Enclosure NEMA 4X, polycarbonate, stainless steel hardware,
weatherproof and corrosion resistant,
HWD: 4.4" (112 mm) × 4.4" (112 mm) × 3.5" (89 mm)
Mounting Options Handheld w/ Nylon Carrying Strap
Weight 1 lb. (0.45 kg)
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.
Ambient Temperature Service, -20 to 60 °C (-4 to 140 ºF)
Storage, -30 to 70 °C (-22 to 158 ºF)
Ambient Humidity 0 to 95%, indoor/outdoor use, non-condensing to rated
ambient temperature range
Electrical Certification Ordinary Location, cCSAus (CSA and UL standards - both
approved by CSA), pollution degree 2, installation category
2
EMI/RFI Influence Designed to EN 61326-1
Output Isolation 600 V galvanic isolation
Filter Adjustable 0-9.9 minutes additional damping to 90% step
input
Temperature Input Selectable Pt1000 or Pt100 RTD with automatic
compensation
Displayed Parameters Main input, 0.00 to 14.00 pH
Sensor temperature, -10.0 to 110.0 °C (14 to 230ºF)
Output Values, 0 to 2.5 VDC, Vout #1/#2
Sensor slope/offset
Model number and software version
Main Parameter Ranges 0.00 to 14.00 pH
Power: Two generic AA batteries, low battery indication at 1.60V
DC.
Outputs: Two 0-2.5 VDC isolated outputs are provided on for
connection to data recorders, etc.

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Battery Life: Approximately 240 hours of operational use on a set of
batteries (without backlight).
1.4 Q45P Performance Specifications
(Common to all variations)
Accuracy 0.1% of span or better (± 0.01 pH)
Repeatability 0.1% of span or better (± 0.01 pH)
Sensitivity 0.05% of span (± 0.01 pH)
Stability 0.05% of span per 24 hours, non-cumulative
(± 0.007 pH)
Warm-up Time 7 seconds to rated performance
Instrument Response Time 6 seconds to 90% of step input at lowest setting
Temperature Drift Span or zero, 0.02% of span/°C
Max. Sensor-Instrument 3,000 ft. (914 meters) w/ preamp,
Distance 30 ft. (9.1 meters) w/o preamp
Sensor Types Model Q25P pH w/ preamp - 5 wire input, or combination
style pH electrode w/ TC - 2 wire input
Equipment bearing this marking may not be discarded by traditional
methods in the European community after August 12 2005 per EU Directive
2002/96/EC. End users must return old equipment to the manufacturer for
proper disposal.

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Part 2 – Instrument Handle/Mounting
2.1 General
The Q45P Portable pH 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 Handle - Views

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Part 3 – Sensor Electrical Installation
3.1 General
The sensor cable can be quickly connected to the Q45 terminal strip by matching
the wire colors on the cable conductors. Keep signal cable away from AC power
lines, adjustable frequency drives, motors, or other noisy electrical signal lines.
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 - Bulkhead Connection

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Figure 3 - Sensor Connection

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3.3 Combination Electrode Connection
The Q45P may also be used with non-amplified simple combination electrodes
(see Figure 4). Note that a wire jumper must be installed from Terminal 3 to
Terminal 8. The user must also select Sensor Type 2within the Config Menu
(see Section 4.9). The maximum sensor-to-instrument cable length will be
severely limited (30-50 feet) with electrodes of this type. The length will depend
on the specific electrode impedance and the quality of interconnect cable
provided by the manufacturer.
6
WHITE RED
1 2
GREEN
3 4 5 10
YELLOW
7
BLACK
8 9 12
SHLD
11
Tel: [phone])
Analytical Technology, Inc.
DISCONNECT POWER
WARNING
BEFORE SERVICING
OR DAMAGE MAY RESULT
S/N: XXXX
Options: XXXX
Voltage: XXXX
P/N: 07-XXXX
Model: Q45P
RTD
IF APPLICABLE
OPTIONAL
WIRE JUMPER
FROM GREEN
TO BLACK
TO COMBINATION-STYLE
SENSOR
Figure 4 - Sensor Connections, Combination Electrodes

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3.4 External Temperature Compensation
All Q25 sensors include an integral Pt1000 RTD. The Q45 series instruments
also allow user-supplied external Pt1000 or Pt100 elements to be connected to
the temperature input, as shown in Figure 5. Note that when using the Pt100
connection, sensor cable length will be limited to 40 feet due to the high cable
resistance error associated with the lower resistance output of Pt100 RTD
elements. In other words, cable resistance represents a higher percentage of
error signal when using a lower-resistance RTD.
6
WHITE RED
1 2
GREEN
3 4 5 10
YELLOW
7
BLACK
8 9 12
SHLD
11
Tel: [phone])
Analytical Technology, Inc.
DISCONNECT POWER
WARNING
BEFORE SERVICING
OR DAMAGE MAY RESULT
S/N: XXXX
Options: XXXX
Voltage: XXXX
P/N: 07-XXXX
Model: Q45P
Pt1000 or Pt100 RTD
TEMPERATURE SENSOR
3-WIRE EXTERNAL
TEMPERATURE SENSOR
DRIVE
SENSE
COM
TEMPERATURE SENSOR
GREEN
3
Analytical Technology, Inc.
Tel: [phone])
RED
1 2
Model: Q45P
P/N: 07-XXXX
Voltage: XXXX
Options: XXXX
S/N: XXXX
TEMPERATURE SENSOR
Pt1000 or Pt100 RTD
2-WIRE EXTERNAL
11
SHLD
WARNING
OR DAMAGE MAY RESULT
BEFORE SERVICING
DISCONNECT POWER
YELLOW
5
WHITE
4 6 7 8
BLACK
10912
Figure 5 - External Temperature Compensation

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Part 4 – Configuration
4.1 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.
4.2 Battery / Power Circuit Board
Q45H 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.
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

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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.
4.3 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.
4.4 Voltage Outputs
There are two sets of analog voltage outputs on the battery board that may be
used to send isolated data back to remotely located recorders, PLC’s, etc. Output
#1 is used only for pH information, and Output #2 can be used for an additional
pH output channel, or it can be selected to output temperature information.

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4.5 User 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.).
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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4.51 Keys
All user configuration occurs 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.
4.52 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 6.3.
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.

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Icon B The left screen area contains one ‘B’ icon that indicates the
battery power is low.
4.6 Software
The software of the Q45P is organized in an easy to follow menu-based system.
All user settings are organized under five menu sections: Measure, Calibration
[CAL], Configuration [CONFIG], Control [CONTROL] and Diagnostics [DIAG].
Note: The default Measure Menu is display-only and has no menu icon.
4.7 Software Navigation
Within the CAL, CONFIG, CONTROL, and DIAG menu sections is a list of
selectable items. Once a menu section (such as CONFIG) has been selected
with the MENU key, the user can access the item list in this section by pressing
either the ENTER key or the UP arrow key. The list items can then be scrolled
through using the UP arrow key. Once the last item is reached, the list wraps
around and the first list item is shown again. The items in the menu sections are
organized such that more frequently used functions are first, while more
permanent function settings are later in the list. See Figure 8 for a visual
description of the software.
Each list item allows a change to a stored system variable. List items are
designed in one of two forms: simple single variable, or multiple variable
sequence. In the single variable format, the user can quickly modify one
parameter - for example, changing temperature display units from °F to °C. In
the multiple variable sequence, variables are changed as the result of some
process. For example, the calibration of pH generally requires more than one
piece of information to be entered. The majority of the menu items in the
software consist of the single variable format type.

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Any data that may be changed will be flashing. This flashing indicates user entry
mode and is initiated by pressing the ENTER key. The UP arrow key will
increase a flashing digit from 0 to 9. The LEFT arrow key moves the flashing
digit from right to left. Once the change has been completed, pressing ENTER
again stores the variable and stops the flashing. Pressing ESC aborts the
change and also exits user entry mode.
The starting (default) screen is always the Measure Menu. The UP arrow key is
used to select the desired display. From anywhere in this section the user can
press the MENU key to select one of the four Menu Sections.
The UP arrow icon next to all list items on the display is a reminder to scroll
through the list using the UP arrow key.
To select a list item for modification, first select the proper menu with the MENU
key. Scroll to the list item with the UP arrow key and then press the ENTER key.
This tells the system that the user wishes to perform a change on that item. For
single item type screens, once the user presses the ENTER key, part or all of the
variable will begin to flash, indicating that the user may modify that variable using
the arrow keys. However, if the instrument is locked, the transmitter will display
the message Locked! and will not enter user entry mode. The instrument must
be unlocked by entering the proper code value to allow authorized changes to
user entered values. Once the variable has been reset, pressing the ENTER key
again causes the change to be stored and the flashing to stop. The message
Accepted! will be displayed if the change is within pre-defined variable limits. If
the user decides not to modify the value after it has already been partially
changed, pressing the ESC key aborts the modification and returns the entry to
its original stored value.
In a menu item which is a multiple variable sequence type, once the ENTER key
is pressed there may be several prompts and sequences that are run to complete
the modification. The ESC key can always be used to abort the sequence
without changing any stored variables.