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O & M Manual Model Q45D/50 Portable Dissolved Oxygen 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...
Part 1 - Introduction General The Model Q45D/60 is a highly versatile portable monitoring/recording system designed for the measurement of dissolved oxygen in solution. The full scale operating range of the system is 0-40.0 ppm and the sensing system will operate on water streams with temperatures from 0 to 50C.
Q45D Portable Dissolved Oxygen Part 1 - Introduction Q45D/60 Portable System Specs Displayed Parameters Main input, 0.00 to 19.99 ppm, 20.0 to 40.0 ppm%Saturation, 0 to 200% Sensor temperature, 0 to 50.0 °C (32 to122 ºF) Sensor Signal -40 to +2000 mVDC Output Values, 0 to 2.5 VDC, Vout #1/#2...
Q45D Portable Dissolved Oxygen Part 1 - Introduction Max. Sensor-to-Analyzer 100 feet (30.5 meters), with junction box Distance Instrument Power Two generic AA batteries, low battery indication at 1.60V Outputs Two 0-2.5 VDC isolated outputs are provided on for connection to data recorders, etc.
Part 2 – Instrument Handle/Mounting General The Q45D/60 Portable Dissolved Oxygen System comes complete with a specially designed handle that allows thesystem to be comfortably carried, or quicklystrapped to arailing. Although the system is designedto be a portable system, it can be permanently mounted for longer term fielduse.
Part 3 –Electrical Connection General The sensor cable can be quickly connected to the Q45terminal strip by matching the wire colors on the cableconductors. 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.
Part 4 – Sensor Assembly Oxygen Sensor Preparation The oxygen sensor supplied with the Q45D is shipped dry. It will not operate until it is prepared by adding electrolyte and a membrane. Preparation of the sensor for operation must be done carefully. The procedure should be done by a qualified technician, and it should only be done when the system is ready for operation.
Part 4 – Sensor Assembly Q45D Portable Dissolved Oxygen Figure 6 - Submersible Sensing Module Assy Follow the procedure below to prepare the D.O. sensor module for operation: 1. Unscrew the electrolyte chamber from the assembled sensor and also remove the vent screw from the side of the sensor body.
Part 4 – Sensor Assembly Q45D Portable Dissolved Oxygen The sensor is now ready for operation. The membrane should be stretched tightly across the tip of the sensor. CAUTION: When handling the assembled sensor, do not set the sensor on its tip or damage to the membrane will result.
Part 5 – Operation 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).
Part 5 – Operation Q45D Portable Dissolved Oxygen POWER CABLE DC BATTERY BOARD (REAR OF ENCLOSURE) Figure 8 - Battery Board Connections The first (S1) is an On/Off slide switch. This switch must be in the ON position for operation.
Part 5 – Operation Q45D Portable Dissolved Oxygen 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.
Part 5 – Operation Q45D Portable Dissolved Oxygen Software Interface The software 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.).
Part 5 – Operation Q45D Portable Dissolved Oxygen Keys All user configurationsoccur 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 changesin a logical manner.
Icon B power is low. Software The software of the Q45D 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.
Part 5 – Operation Q45D Portable Dissolved Oxygen SoftwareNavigation Within the CAL, CONFIG, CONTROL, and DIAG menu sections are 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 Q45D Portable Dissolved Oxygen Start MENU MENU MENU MENU MENU MENU MEASURE CONFIG DIAG SECTIONS (display only) ENTER ENTER ENTER ENTER Entry Lock Temperature Set Hold Set 4mA Sensor mV Cal Temp Set Delay Fault List...
Part 5 – Operation Q45D Portable Dissolved Oxygen 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 Q45D Portable Dissolved Oxygen Configuration Menu [CONFIG] The Configuration Menu contains all of the general user settings: Entry Lock This function allows the user to lock out unauthorized tampering with instrument settings. All settings may be viewed while the instrument is locked, but they cannot be modified.
Part 5 – Operation Q45D Portable Dissolved Oxygen Zero Filter The Q45D allows the user to program a value near zero below which the monitor will read zero. Because sensors rarely have a perfect zero stability, this zero filter eliminates occasional displays of numbers that are not meaningful.
Part 5 – Operation Q45D Portable Dissolved Oxygen select the desired numerical value. Press ENTER to store the new value. Output #1 will always be in units of ppm, as it is fixed to track dissolved oxygen. Output #2 will be in either units of ppm or C/F, depending on whether dissolved oxygen or temperature is set for Out#2 in the CONFIG menu.
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Part 5 – Operation Q45D Portable Dissolved Oxygen Sim Out The Sim Out function allows the user to simulate the dissolved oxygen level of the instrument to check the output settings. The user enters a ppm value directly onto the screen, and the output responds as if it were actually receiving the signal from the sensor.
Under normal conditions (3 - 5 ppm) the degradation occurs at a very slow rate. To account for this degradation, the Q45D system should be re-calibrated at regular intervals. In addition, the frequency of calibration must be determined by the application.
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Q45D Portable Dissolved Oxygen Part 6 - Calibration 5. The system now begins acquiring data for the calibration value. As data is gathered, the units for ppm and temperature may flash. Flashing units indicate that this parameter is unstable. The calibration data point acquisition will stop only when the data remains stable for a pre-determined amount of time.
Q45D Portable Dissolved Oxygen Part 6 - Calibration 6. The display will prompt the user to hold the sensor in air and press ENTER. If the sensor has already been removed, reached temperature equilibrium, and the calibration bag has been installed, press the ENTER key.
Q45D Portable Dissolved Oxygen Part 6 - Calibration 6. If accepted, the screen will display the message PASS with the new sensor zero reading (offset), then it will return to the main measurement display. If the calibration fails, a message indicating the cause of the failure will be displayed and the FAIL icon will be turned on.
Part 7 – System Maintenance General The Q45D/60 Dissolved oxygen 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.
Part 8 – System Maintenance Q45D Portable Dissolved Oxygen Lead AnodeReplacement Galvanic D.O. sensors consume the lead electrode during normal operation. As oxygen is measured, lead is converted to lead oxide, and after a period of time, the lead is expended.
Part 8 – Service 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.
30 minutes passes with no calibration function only allows adjustments of keys being pressed. +/- 6 ºC. If still failure, perform sensor tests as described in section 8.4. Replace sensor if still failure. . Figure 11 - Q45D Display Messages...
Q45D Portable Dissolved Oxygen Part 9 - Service Sensor Tests Check the membrane condition. A membrane that is not stretched smoothly across the tip of the sensor will cause unstable measurements. If necessary, change membrane and electrolyte. Dissolved oxygen sensors can be tested with a digital voltmeter (DVM) to determine if a major sensor problem exists.
Q45D Portable Dissolved Oxygen Part 9 - Service If you suspect that water has gotten into a cable connection on a flow type sensor or into the plug connection of a submersible sensor, disconnect the cable and allow the parts of the sensor to sit in a warm place for 24 hours. If water in the connector is the problem, it should dry out sufficiently to allow normal sensor operation.
Q45D Portable Dissolved Oxygen Part 9 - Service Water Saturated Concentration of O Temperature Temperature °F °C °F °C 14.6 23.3 14.1 24.4 13.7 25.6 13.3 26.7 12.9 27.8 12.6 28.9 12.2 30.0 11.9 31.1 11.6 32.2 10.0 11.3 33.3 11.1...
Spare Parts List Part No. Description 07-0012 Q45D D.O. monitor electronics assembly, 3VDC 07-0078 Flow Type D.O. sensor Oxygen sensor, submersion type with 30’ cable 07-0095 02-0007 Submersion sensing module, (for #07-0095) 02-0014 Submersion element body, (for #02-0007) Submersion holder, 30’ cable (for #07-0095)
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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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