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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: 800-959-0299...
4.86 Diagnostics Menu [DIAG]..... 25 General............4 Standard System ........4 PART 5 – CALIBRATION ........27 Features ............5 PQ45P System Specifications ....6 Overview and Methods ......27 PQ45P Performance Specifications ... 7 5.11 Sensor Slope ........27 5.12...
Part 1 - Introduction 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.
PQ45P Portable pH System Part 1 - Introduction Figure 1 - PQ45 Portable Monitor System 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.
PQ45P Portable pH System Part 1 - Introduction 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.
PQ45P Portable pH System Part 1 - Introduction 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.
Part 2 – System Components 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.
Part 3 – Sensor Preparation PQ45P pH System 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.
Part 3 – Sensor Preparation PQ45P pH System 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.
Note that jumpers will be installed at the factory between terminals 3 and 5, and terminals 6 and 9 Figure 5 - Sensor Connections, PQ45P pH System O&M Manual...
PQ45P pH System Battery / Power Circuit Board PQ45P monitors are normally powered by internal C-cell alkaline batteries or by an external power connection. Figure 6 shows this board assembly with batteries installed. Figure 7 shows the same board with terminals installed for external power connection.
Part 4 – Electrical Assembly PQ45P pH System operation will be limited to about 10 days on a charge. 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.
Part 4 – Operation User Interface To turn the system ON, simply press the MENU key and the display will come on. Once the instrument is turned on, it will run continuously until it is turned off manually or the batteries are consumed.
Part 5 – Operation PQ45P pH System Voltage Outputs There are two analog voltage outputs on the battery board with a terminal strip located in the lower right corner. The outputs are 0-2.5 VDC and may be used to send isolated data the optional PQ45 data logger or to remotely located recorders, PLC’s, etc.
Part 5 – Operation PQ45P pH System User Interface The user interface for the PQ45 Series instrument consists of a custom display and a membrane keypad. All functions are accessed from this user interface (no internal jumpers, pots, etc.). RELAY...
Part 5 – Operation PQ45P pH System 4.71 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.
Part 5 – Operation PQ45P pH System 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.
Part 5 – Operation PQ45P pH System 4.81 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.
Part 5 – Operation PQ45P pH System Start MENU MEASURE CONFIG CONTROL DIAG SECTIONS (display only) Temperature Set 0V (#1) Entry Lock Cal pH Set Hold Sensor mV Set 2.5V (#1) Cal Temp Set Delay Fault List Set 0V (#2)
Part 5 – Operation PQ45P pH System 4.82 Measure Menu [MEASURE] The default menu for the system is the display-only menu MEASURE. This menu is a display-only measurement menu, and has no changeable list items. When left alone, the instrument will automatically return to this menu after approximately 30 minutes.
Part 5 – Operation PQ45P pH System Cal Temp The temperature calibration function allows the user to adjust the offset of the temperature response by a small factor of ±5°C. The temperature input is factory calibrated to very high accuracy. However, long cable lengths and junction boxes may degrade the accuracy of the temperature measurement in some extreme situations.
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This is a multiple variable function that allows the user to choose which pH buffer sets that will be utilized in the 2-point calibration mode. The PQ45P contains 3 sets of built-in buffer tables with compensation values ranging from 0 to 95 °C. During 2-point calibration, the instrument will automatically identify which buffer is being used and compensate for the value based on the built-in tables.
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Part 5 – Operation PQ45P pH System Table 1 Table 2 4.00 pH 7.00 pH 9.18 pH 4.00 pH 7.00 pH 10.00 pH ºC °C °C ºC °C °C 4.00 7.10 9.46 4.00 7.10 10.27 3.99 7.06 9.33 3.99 7.06 10.15...
Part 5 – Operation PQ45P pH System 4.85 Control Menu [CONTROL] The Control Menu contains all of the output control user settings: Set 0V These functions set the output range for each of the two instrument Set 2.5V #1 outputs. The value stored for the 0V point may be higher or lower Set 0V than the value stored for the 2.5V point.
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Part 5 – Operation PQ45P pH System Faults are not stored; therefore, they are immediately removed if power is cycled. If the problem causing the faults still exists, however, faults will be displayed again after power is re-applied and a period of time elapses during which the diagnostic system re-detects them.
Part 5 – Calibration Overview and Methods Since the sensor slope (mV/pH output) will degrade over time, the instrument must be calibrated periodically to maintain a high degree of measurement accuracy. Frequency of calibration must be determined by the application. High temperature applications or applications involving extreme pH operating conditions may require more frequent calibration than those that operate at more neutral pH levels and ambient level temperatures.
Part 7 – DataLogger PQ45P pH System 5.13 2-Point Calibration Explained The 2-point calibration method involves the movement of the sensor through two known pH buffer values. Therefore, the sensor must be removed from the application to utilize this method. Two- point calibration adjusts both the slope and the offset of the sensor.
Part 7 – DataLogger PQ45P pH System 5. The display will prompt the user to place the sensor in the first buffer and press ENTER. If the sensor has been placed into this buffer already, once the temperature has stabilized, press ENTER to continue.
Part 7 – DataLogger PQ45P pH System 2. If the sensor has been removed and placed into a buffer, allow sensor to temperature equilibrate with the buffer as much as possible. With the sensor coming from an application which differs greatly in temperature difference, the user may have to wait as much as 20 minutes.
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Part 7 – DataLogger PQ45P pH System Procedure 1. Scroll to the CAL menu section using the MENU key and press ENTER or the UP arrow key. 2. Press the UP arrow key until Cal Temp is displayed. 3. Press the ENTER key. The message Place sensor in solution then press ENTER will be displayed.
Part 6 – Data Logger (Option) General The data logger module is an entirely separate device from the Q45 and is supported by a complete software suite for the PC. The required download cable and software are available as an option (only one download cable and one piece of software is required to download an unlimited number of modules.) The software also sets the recording interval, time stamps, and scaling for the module.
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Part 7 – DataLogger PQ45P pH System Logger Battery Replacement The data logger contains a disposable battery that will normally last over 6 months in continuous operation. The battery condition can be seen on the setup screen in the HOBOware Pro software.
Part 7 – System Maintenance General The PQ45P pH Monitoring System will generally provide unattended operation over long periods of time. With proper care, the system should continue to provide measurements indefinitely. For reliable operation, maintenance on the system must be done on a regular schedule. Keep in mind that preventive maintenance on a regular schedule is much less troublesome than emergency maintenance that always seems to come at the wrong time.
Part 8 – Troubleshooting General The information included in this section is intended to be used in an attempt to quickly resolve an operational problem with the system. During any troubleshooting process, it will save the most time if the operator can first determine if the problem is related to the analyzer, sensor, or some external source.
Part 9 – Troubleshooting PQ45P pH System Display Messages The Q45 Series instruments provide a number of diagnostic messages which indicate problems during normal operation and calibration. These messages appear as prompts on the secondary line of the display or as items on the Fault List.
Part 9 – Troubleshooting PQ45P pH System Unlocked Transmitter security has just been unlocked. Displayed just after security code has been entered. TC-F25 lock! The TC selection is in F25 mode, locked at 25º C Calibration and TC adjustment cannot be performed while TC is in F25 mode.
Spare Parts Part No. Description 03-0349 PQ45 Front Electronic Assembly 01-0240 Battery circuit board with dual 0-2.5 VDC output 63-0013 pH Sensor, twist-lock 45-0254 pH Flowcell 55-0048 Fixed flow regulator, 0.4 LPM 47-0093 Y-Strainer, delrin, 74 micron 42-0289 O-ring for 63-0013 Sensor 44-0287 Panel mount inlet/outlet fitting 44-0288...
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PRODUCT WARRANTY Analytical Technology, Inc. (Manufacturer) warrants to the Customer that if any part(s) of the Manufacturer's equipment proves to be defective in materials or workmanship within the earlier of 18 months of the date of shipment or 12 months of the date of start- up, such defective parts will be repaired or replaced free of charge.
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