ATI Technologies PQ45P User manual

O & M Manual
Model PQ45P
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]

Table of Contents
TABLE OF FIGURES ............................................3
PART 1 - INTRODUCTION..................................4
1.1 General.......................................................4
1.2 Standard System ........................................4
1.3 Features......................................................5
1.4 PQ45P System Specifications....................6
1.5 PQ45P Performance Specifications ...........7
PART 2 –SYSTEM COMPONENTS ...................8
2.1 General.......................................................8
PART 3 –ELECTRICAL ASSEMBLY..............11
3.1 General.....................................................11
3.2 Sensor Connections .................................11
3.3 Battery / Power Circuit Board .................12
3.4 External Power / Output Connections......13
PART 4 –OPERATION .......................................14
4.1 User Interface...........................................14
4.2 Battery Power Circuit Board....................14
4.3 Voltage Outputs.......................................15
4.4 External Power.........................................15
4.5 Data logger Module .................................15
4.7 User Interface...........................................16
4.71 Keys.....................................................17
4.72 Display.................................................17
4.8 Software...................................................18
4.81 Software Navigation...........................19
4.82 Measure Menu [MEASURE]...............21
4.83 Calibration Menu [CAL] ........................21
4.84 Configuration Menu [CONFIG] .........22
4.85 Control Menu [CONTROL] ...............25
4.86 Diagnostics Menu [DIAG].....................25
PART 5 –CALIBRATION...................................27
5.1 Overview and Methods............................27
5.11 Sensor Slope ........................................27
5.12 Sensor Offset .......................................27
5.13 2-Point Calibration Explained .............28
5.14 1-Point Calibration Explained .............28
5.2 Performing a 2-Point Calibration.............28
5.3 Performing a 1-Point Calibration.............29
5.4 Temperature Calibration................................30
PART 6 –DATA LOGGER (OPTION) ..............32
PART 7 –SYSTEM MAINTENANCE ...............34
7.1 General.....................................................34
7.2 Analyzer Battery Replacement ................34
7.3 Flow Cell Maintenance............................34
PART 8 –TROUBLESHOOTING ......................35
8.1 General.....................................................35
8.2 Analyzer Tests.........................................35
8.3 Display Messages ....................................36
SPARE PARTS......................................................38

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Table of Figures
FIGURE 1-PQ45 PORTABLE MONITOR SYSTEM.......................................................................................................................5
FIGURE 2-FRONT VIEW OF HINGED PANEL.............................................................................................................................8
FIGURE 3-SENSOR AND FLOW COMPONENTS..........................................................................................................................9
FIGURE 4-STANDARD PHSENSOR.......................................................................................................................................10
FIGURE 5-SENSOR CONNECTIONS,PQ45P PHSYSTEM..........................................................................................................11
FIGURE 11 -SOFTWARE MAP .............................................................................................................................................20
FIGURE 12 -AUTOMATIC PHBUFFER TABLES.........................................................................................................................24
FIGURE 13 -PQ45 DISPLAY MESSAGES................................................................................................................................37
FIGURE 15 -PT100 RTD TABLE..........................................................................................................................................37

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Part 1 - Introduction
1.1 General
The Model PQ45P Portable pH Monitor is designed for short-term measurement and data logging
of pH in liquid. It may also be used for permanent monitoring in locations where solar power
systems are available to provide continuous power.
Each system is a self-contained package that includes a battery-powered analyzer, sensor,
flowcell assembly, and sample flow controls. Sample and drain connections are provided on the
outside of the case, and connectors and tubing to adapt to water samples are supplied. Sample
lines with pressures up to 75 PSI (5 Bar) may be connected without pressure reduction. For
samples subject to higher pressures, a pressure-reducing valve should be used to control sample
pressure to less than 75 PSI (5 Bar).
Both the fittings installed in the case and the fittings supplied for sample tubing connection
externally are equipped with shut-off valves. When both fittings are plugged in, sample will flow.
When either the inlet or outlet fittings are disconnected, sample flow will stop. Sample flow rate is
controlled internally by a special orifice flow control device that provides a fixed 400 cc/min. flow
at sample inlet pressures between 5 and 75 PSI (0.3-5.0 Bar). An in-line y-strainer is installed to
trap particles larger than 65 micron.
Most system components are mounted on a hinged panel inside the case. The electronic unit is
mounted on the front of the panel. If the optional data logger was ordered, this is also mounted
on the front. Opening up the internal panel allows access to the sensor, flowcell, and flow control
assembly. Maintenance items, connectors, and extra tubing are stored in the space behind the
panel.
1.2 Standard System
Standard PQ45 systems include a battery-powered electronic unit, a pH sensor, flowcell, flow
control components, sample and drain tubing, and various accessories. The standard batteries
consist of two standard alkaline C-cell batteries located inside the electronic assembly.

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Figure 1 - PQ45 Portable Monitor System
1.3 Features
Standard main module is designed to be a fully isolated, battery-powered instrument. An optional
arrangement provides for external power from a 10-16 VDC supply.
Output Hold, Output Simulate, Output Alarm, and Output Delay Functions. All forced changes in
output condition include bumpless transfer to provide gradual return to on-line signal levels and to
avoid system control shocks on both analog outputs.
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. Optional
plug-in datalogger (removable module) allows the user to gather up to 32,000 total data points on
temperature and pH.
Large, high contrast, custom Super-Twist display provides excellent readability even in low light
conditions. 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.
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 13
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.

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Security lock feature to prevent unauthorized tampering with transmitter settings. All settings can
be viewed while locked, but they cannot be changed.
High reliability, microprocessor-based system with non-volatile memory back-up that utilizes no
batteries. Low mass, surface mount PCB construction containing no adjustment potentiometers.
All factory calibrations stored in non-volatile EEPROM.
1.4 PQ45P 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)
Display Large, high-contrast, Super-Twist (STN) LCD;
4-digit main display with sign, 0.75" (19.1 mm) seven-segment
characters;
12-digit secondary display, 0.3" (7.6 mm) 5×7 dot matrix
characters
Keypad 4-key membrane type with tactile feedback, polycarbonate with
UV coating, integral EMI/static shield and conductively coated
window
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 Generic 9 VDC alkaline battery, low battery indication at 6.75 V
DC. Lithium 9 VDC battery recommended for max performance.

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Outputs Two 0-2.5 VDC isolated outputs are provided on for connection
to data recorders, etc.
Battery Life Approximately 100 hours with alkaline battery. Use of lithium cell
increases life to approximately 300 hours.
Optional Datalogger Removable data module holds 32,000 points from two user
configured channels, time of logging is user configurable.
Software supplied for data download and display.
1.5 PQ45P Performance Specifications
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 the standard
combination style pH electrode w/ TC - 2 wire input

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Part 2 – System Components
2.1 General
The PQ45 Portable pH Monitoring System comes complete in a rugged molded case, and is
designed to be operated by simply setting the case in the desired location, connecting sample
and drain tubes, and turning on the power. Once the system has been readied for use, it can be
turned on and off, and moved to various locations without requiring further service.
2.2 Front Panel Components
The PQ45 contains an internal hinged panel. Release the two main case latches and you will see
the electronic monitor on the front of the panel with a graphic of the software map located below.
The graphic is meant to be a reference for navigating the software in the analyzer. If the optional
data logger was ordered, this component will be located just below the monitor, and will have two
connectors plugged into the side.
Figure 2 - Front View of Hinged Panel

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2.3 Internal Flow System
The “Wet” section of the analyzer is located on the back of the internal hinged panel. The panel
is held in place by two captive screws on the right side. Loosen these screws to get access to the
sensors and sample flow components. Figure 3 identifies the items located on the back of the
panel.
Figure 3 - Sensor and Flow Components
The flow system inside the case consists of quick-disconnect sample and drain fittings,
polyurethane tubing, flow control assembly, and a flowcell with pH sensor. This system is
completely assembled and is designed for connection to water sources with pressure between 5
and 75 PSI. Note that the drain tube MUST discharge to an unpressurized drain. You may not
connect the drain to a pressurized line or the system will not function properly.
Most tubing connections are made using what are called “instant tube fittings”. These fitting are
designed to allow tubing to be readily removed in case service is needed on a particular
component. This is normally only needed to remove the flow control assembly to clean the y-
strainer.
The instant tube fittings have a circular collar at the end of the fitting. This collar must be pushed
toward the main body of the fitting while pulling the tubing in the opposite direction. When
reinserting the tubing, simply press the tubing into the fitting and you will feel it slide into place.

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2.4 Flow Control System
The sample flow to the sensors in this instrument is controlled by a special orifice control device
that controls sample flow to approximately 400 cc/min. regardless of variations in inlet pressure.
The flow control device is protected by a y-strainer. This strainer is designed to remove any large
particles that might adversely affect the performance of the flow control.
The y-strainer should be inspected periodically and cleaned of accumulated solids. To do so, it is
easiest to remove the entire flow control system by disconnecting the inlet and outlet tubes from
the top and bottom of the assembly, and then removing it from the mounting clip. Once removed,
use a crescent wrench to unscrew the screen holder. Remove the screen and rinse as needed to
remove any accumulated solids.
2.5 Water Sample Connections
On the hinged side of the case are two quick-disconnect fittings marked INLET and OUTLET.
This is where you will connect your water sample. These connectors contain valves that
automatically close when the mating connector is removed. Mating connectors also contain
valves so that sample lines can be disconnected without closing the main tap valve.
A 20-foot (6 m.) length of 0.25” O.D. x 0.17” I.D. polyurethane tubing is supplied for connection to
water lines. In addition, tube fittings that mate with either 1/8” NPT or ¼” NPT sample lines are
supplied for convenience.
2.6 Spare Parts
Behind the internal panel in the area of the flowcells and sensors is a molded foam area that
holds spare parts that might be needed in the field. The following items are normally supplied.
Qty. 1 Data Logger Software (if purchased with system)
Qty. 2 Quick-disconnect fittings for sample & drain connection
Qty. 4 Water system adapter fittings –two each of 1/8” NPT & ¼” NPT
20 feet ¼” O.D. x 0.17” I.D. sample / drain tubing
Attached inside the front cover is a plastic pouch containing the O&M manual for the instrument.
To remove the pH sensor from the flowcell, turn the sensor until the twist-lock pins line up with
the insertion slots and CAREFULLY pull the sensor upward. Be very careful removing the
sensor as it is easily broken.
Figure 4 - Standard pH Sensor