OPERATING INSTRUCTION MANUAL MODEL 2200D/P91 DISSOLVED OXYGEN SYSTEM REV. 8.0 Water Analytics, Inc. 100 School Street Andover, MA 01810 978-749-9949 Toll free: 855-747-7623 (855-pHProbe) Fax: 978-749-9961 www.WaterAnalytics.
TABLE OF CONTENTS GENERAL INFORMATION 1 SPECIFICATIONS 2 INSTALLATION 4 DESCRIPTION OF FUNCTIONS 8 START-UP AND OPERATION 12 OPERATING HINTS 17 UTILITY MENU 18 DIAGNOSTICS 20 TROUBLESHOOTING AND SERVICE 21
MODEL 2200D DISSOLVED OXYGEN ANALYZERS AND MODEL P91 DISSOLVED OXYGEN SENSOR INSTRUCTION MANUAL 1.0 GENERAL INFORMATION The AquaMetrix Model 2200D Dissolved oxygen analyzer is a versatile industrial microprocessor based instrument. Outputs are programmed through the menu with push buttons on the face of the instrument. Calibration is also accomplished through the front panel menu. The instrument must be used in conjunction with the AquaMetrix Model P91 dissolved oxygen sensor.
Instrument automatically returns to on-line operation if accidentally left in menu mode (This feature may be held disabled if desired) 2.0 SPECIFICATIONS DISPLAY: 3 1/2 digit LED, 1/2" high digits ACCURACY: % Saturation: Ppm: Temp: ± 1% ± 0.1 ± 0.2°C STABILITY: 0.1% of span per 24 hrs., non-cumulative MEASURING RANGES: D.O.: 0-20.
TEMPERATURE RANGE: 0-40°C (32 to 104°F) WETTED MATERIALS: PVC and Teflon F.E.P. FAILURE ALARM: 5A SPDF relay closes if membrane is punctured. LED on panel is illuminated CABLE: Integral 8 m (26 ft.) Maximum distance to analyzer 300 m (1000 ft.) REPLACEMENT CARTRIDGE: Part No. P91-D. Hermetically sealed. MOUNTING HARDWARE FLOTATION MOUNTING: Model MHBF consists of ball float, extension pipe, swivel bracket, junction box and 50 feet of interconnect cable SUBMERSION MOUNTING: Model MHDS consists of 5 ft.
3.0 INSTALLATION 3.1 Location 3.1.1 Locate the instrument within the reach of the cable provided for the P91 sensor. 3.1.2 Select an installation site which is: • free of mechanical vibrations • reasonably clean and dry • protected from falling corrosive fluids within the ambient temperature and humidity specifications • remote from high voltage relay and power switches 3.2 Type of Mounting 3.2.1 If the instrument is to be pipe or panel mounted a special hardware kit will be required.
3.5 Sensor Installation, Flotation Mounting 3.5.
d) The sensor may be attached to float assembly in one of two ways: 1. With sensor EXTENDED FROM BOTTOM of flotation ball: Insert 12-inch long extender pipe into the flotation ball and fasten it to the end of adapter pipe. This will extend the sensorʼs membrane 12 inches below the flotation ball. NOTE: Extender pipe supplied only when ordered. 2. With the sensor membrane FLUSH WITH BOTTOM of flotation ball: Disregard using extender pipe and proceed with Step e).
b) Route sensor cable through pipe and fasten sensor to pipe. The use of thread sealant (Teflon tape) on all mounting hardware and sensor threads is recommended to avoid leaks. CAUTION: Do not remove measuring cell cartridge from hermetically sealed package until it is to be used in step b). (Membrane will dry out and damage measuring cell). c) Install measuring cell cartridge. Unfasten union nut from sensor and make sure to remove any moisture from cavity area and brass contact strips.
4.0 DESCRIPTION OF FUNCTIONS 4.1 Overview 4.1.1 The Model 2200D is a microprocessor based dissolved oxygen analyzers are designed for industrial applications. They operate in conjunction with the AquaMetrix P91 sensor. The software in the unit makes the instrument very easy to operate and maintain. 4.1.2 The outputs include voltage-free relay contacts and industry standard analog transmission signals. A relay to indicate a perforated membrane is provided.
Some of these are: • • • • • • • • Recall and easy adjustment of relay and output parameters Push button calibration A HOLD function for outputs Continuous sensor check during measurement Continuous self check and watch-dog timer to ensure correct operation Password protection of stored values Temperature Output Simulated input for testing 4.2 Calibration 4.2.1 The 2200D is calibrated at the factory, with the sensor purchased with the instrument.
4.6 Analog Outputs 4.6.1 The analog output signals consist of a non-isolated 0-1 mA, 0-5 Vdc, and isolated 420 mA signals. 4.6.2 From the factory all of the analog outputs have a linear range corresponding to the full range of the instrument. The 4-20 mA output can be programmed to another linear range by entering two values: • Output High: This is the D.O. value at which you wish to have 100% output. • Output Low: This is the D.O. value at which you wish to have 0% output. 4.6.
• Alarm Relay Low 4.8 DIP Switches 4.8.1 The controls which are frequently used in the normal operation of the instrument are all accessible on the control panel. Some switches, which are infrequently used are located on the back of the swing-out board. 4.8.2 The DIP switches are scanned on RESET, power-up and every time the instrument is taken into the menu mode.
4.9 Output Hold 4.9.1 Output hold, is a function which freezes all output signals at the last value to prevent the occurrence of wild distortions during programming and maintenance. 4.9.2 When the Operation Menu is entered by pressing CALL, the alarm relays and the analog outputs are automatically placed on hold and remain on hold until the instrument returns to on line. The output hold will remain for a maximum of 10 minutes after the last button was pressed, if this feature has been enabled.
5.2 Percent Saturation/ppm 5.2.1 The instrument provides measurement of dissolved oxygen in either percent saturation or ppm. In ppm measurement the reading is automatically compensated for temperature changes in the medium. a) To select units of measurement enter the menu by pressing CALL to indicate %sat/ppm. b) Press the UP arrow button to select %sat or the DOWN arrow button or select ppm. c) Press RUN to return to on line or press CALL for another menu selection. 5.3 Calibration 5.3.
5.4 Analog Output Range Expand 5.4.1 The 4-20 mA isolated analog output may be spread over any section of the scale as long as that section is at least 10% of full scale. The best way to describe this setup is by example. Suppose you wish the 4-20mA output to span 4 ppm to 10 ppm. Proceed as follows: a) Press CALL as many times as required until OUTPUT HIGH is indicated. Now use the arrows to make the meter read 10 ppm. Press ENTER. The display will flash until ENTER is pressed again to confirm entry.
5.7 Status 5.7.1 The 2200D continuously checks the integrity of all stored data and monitors the condition of the measuring system. If a fault is detected, the FAIL LED above the display will turn red. The STATUS in the operation menu will provide a numerical code, giving a possible cause and a suggested remedy. 5.7.
c) Press CALL the required number of times until RELAY A SETPOINT is indicated. Now use the arrows to make the display read the desired value. Press ENTER. The display will flash until ENTER is pressed again to confirm entry. A LED above the display indicates when Relay A is activated. d) Press RUN to place the instrument on line or press CALL for another menu selection. 5.9 Relay A Deadband (For Model 2200D-X-2 only) 5.9.
pressed a second time to confirm entry. b) Press RUN to place the instrument on line, or press CALL, for another menu selection. NOTE: A low alarm point higher than the high alarm point is an invalid entry, which is indicated by the LED flashing when you return to RUN. To correct, return to the menu and reset the alarm points. 6.0 OPERATING HINTS 6.1 Cell Care 6.1.1 If the sensor membrane is exposed to the atmosphere for more than 24 hours, the electrolyte inside the membrane can dry out.
7.2 Access to Utility Menu 7.2.1 The Utility Menu is protected by password. To access the Utility Menu press and hold both RUN and ENTER for five seconds until the PASSWORD LED illuminates. The RUN LED will flash to warn that Utility Menu is in use. Now with the arrow keys make the display read the password, "7". Press ENTER. 7.2.2 The Utility Menu is entirely separate from the Operation Menu but uses the same LED display. Press CALL to step through the menu items.
e) Press RUN to return to on line or press CALL to proceed to another item in the Utility Menu. 7.5 Adjust 4-20 mA Output 7.5.1 It may be desirable to fine tune the 4-20 mA isolated output to take into account the characteristics of your particular loop. Before deciding that the adjustment is necessary, be aware of the "Output High" and "Output Low" settings you may have programmed as described in Section 5.4.
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9.0 TROUBLESHOOTING AND SERVICE 9.1 Isolate the cause 9.1.1 When a measurement problem occurs, the first step is to try to isolate the cause. If the 2200D is powered, go through the menu and check your settings. A convenient way to do this is to call TEST. See Section 5.5. 9.1.2 If your 2200D appears dead or intermittent, check the breaker, make sure that the instrument is set up for the available line voltage and make sure the line voltage is actually available at the terminals.
9.2 Escape 9.2.1 If the instrument appears to be "DEAD", for example not responding to the buttons, or not performing on line measurement and control, always try the reset feature first, as described in 6.3.1. 9.2.2 a) The "ESCAPE" procedure is to be used normally at the factory only, when the unit is powered with a new MCU. As a result, the internal non-volatile memory (EEPROM) is "FORMATTED" and the factory values are loaded into it.
b) The power supply circuit board is fastened to the back of the enclosure by four screws, remove the screws and the board is free. Reverse the procedure to mount a replacement board. c) The microprocessor circuit board is located on the swing-out assembly behind the door. Swing the assembly out, lift it up to unseat the lower hinge pin (the upper hinge pin is spring loaded.) The assembly is now free. The circuit board is fastened to the front panel by three screws.
9.6 Customer Service 9.6.1 If a problem has not been resolved with the above procedures, a telephone consultation with your Aquametrix representative, or directly with Water Analytics will provide the answer. Water Analytics Inc. 100 School Street Andover, MA 01810 Tel: 978-749-9949 Fax: 978-749-9961 Toll-free: 855-747-7623 Email: support@WaterAnalytics.com 9.7 Parts and Accessories 9.7.1 The major parts are listed below. When ordering parts please use the complete part number.
