OWNER’S MANUAL AM-TBR Turbidimeter Water Analytics 100 School Street Andover, MA 01810 Phone: 749-9949 Toll free: 855-766-7623 N116-126 Rev 1 E-Mail: info@wateranalytics.net www.WaterAnalytics.
DECLARATION OF CONFORMITY Application of Council Directive Standards to Which Conformity is Declared: st Product Safety - Tested and passed ETL (tested to UL 61010B-1), 1 Edition, Dated January 24, 2003 - Tested and passed ETLc (tested to CSA C22.2#1010.1-92) - Tested and passed CE to IEC 61010-1: 2001 Edition 2.0 Emissions & Immunity – Tested and passed EN61326-1:2006 Manufacturer’s Name: Water Analytics, Inc.
1. OVERVIEW ................................................................................................................2 1.1. The AM-TBR Series.................................................................................................................................................. 2 1.2. Unpacking and Inspection of the Instrument and Accessories .......................................................................... 2 1.3. The Display...................................................
7. INSTRUMENT CONFIGURATION (CONFIG MODE) ..............................................18 7.1. Selecting the Output (O/P) ..................................................................................................................................... 18 7.2. Setting the 4-20 mA ................................................................................................................................................. 18 7.3. Configuring the Error Level.......................................
8.6. Remote Panel Meter (Catalog # 19609) ............................................................................................................... 29 9. TROUBLESHOOTING & MAINTENANCE ..............................................................30 9.1. AM-TBR Fault Detection....................................................................................................................................... 30 9.2. System FAIL Message ...........................................................
Specifications Measurement Range 0 – 1000.0 NTU 0 – 100 NTU (Model 20055 & 20056) Accuracy ±2% of reading or ±0.02 NTU below 40 NTU whichever is greater ±5% of reading above 40 NTU Resolution 0.
1. Overview The AM-TBR process turbidimeter allows for the measurement of the turbidity of process water on-line. The white light AM-TBR has been designed to meet the design criteria specified by the US EPA 180.1 on turbidity measurement. The infrared AM-TBR was designed to meet the design criteria specified in ISO 7027 and DIN 27027 for the measurement of the turbidity of a sample. All models have long life lamps. Some models have ultrasonic cleaning. Refer to 8.2 for more information.
*Note: The spare cuvette (single pack) is only included for models AM-TBR2. Remove the instrument from the packing carton. Carefully inspect all items to ensure that no visible damage has occurred during shipment. If the items received do not match the order, please immediately contact the local distributor or the Water Analytics Customer Service department. 1.3. The Display Figure 1 illustrates all the items that can appear on the display.
Figure 2 - Touch Pad 1.5. Vapor Purge The AM-TBR is equipped with a continuous vapor purge system. A replaceable desiccant pouch in the lower portion of the instrument dries the air. System heat is used to warm the air. A fan inside the instrument continuously circulates heated dry air around the optical well and the flow through cuvette. This feature eliminates the need for a dry purge line. The AM-TBR monitors the replaceable desiccant pouch condition continuously.
2. Safety This manual contains basic instructions that must be followed during the commissioning, operation, care and maintenance of the instrument. The safety protection provided by this equipment may be impaired if it is commissioned and/or used in a manner not described in this manual. Consequently, all responsible personnel must read this manual prior to working with this instrument. In certain instances Notes, or helpful hints, have been highlighted to give further clarification to the instructions.
Figure 3 - Overall Mounting Dimensions of the Instrument It is critical that the instrument be mounted as close as possible to the sampling point to ensure a quick response time (within 2-3 meters (6-10 ft) of the sampling point). 3.2. Plumbing The recommended plumbing for the instrument is shown in Figure 4. The instrument is designed to require very little head pressure to operate; around 6.9kPa (1 PSI). The flow through cuvette is rated for a flow of 100ml/min. – 1 liter/min. (0.026-0.26Gal/min).
Figure 4 - Recommended Plumbing for the Instrument The instrument is equipped to be plumbed using 4.75 mm (3/16”) ID, 8 mm (5/16”) OD flexible tubing. Opaque tubing should be used if the tubing will be exposed to sunlight, to prevent algae growth. In figure 4, there are two flow devices shown. The one on the input side is a shutoff clamp used during cuvette maintenance. The other device is a backpressure valve.
The sensor drain tubing MUST be routed to a suitable drain. DO NOT reintroduce the drain sample to the process stream. This is due to the fact that the wetted materials are not FDA approved. See below for more information. 3.2.2. Wetted Materials: Water Analytics accepts no responsibility for damage caused by the introduction of vapors, fluids or other materials into the instrument process stream which is not compatible with the instrument’s wetted materials.
Figure 5 - Electrical Connections for the Instrument 3.3.1. Power The instrument is equipped with a 100-240 VAC, 47-63 Hz switching power supply; please verify that the line voltage falls within these specifications. It is recommended that a circuit breaker be placed prior to the power connection to allow for service. While making connections, refer to Figure 5. The AM-TBR is not supplied with a power cord. 3.3.2.
3.3.4. 4-20 mA The 4-20 mA output is driven by a 15 VDC power source and can drive recorder loads up to 600 ohms. This 4-20 mA output is isolated from line power and earth ground. Do not run 4-20 mA cables in the same conduit as power. Operation of this output is covered in section 7.2. Note: The installation of the 4-20 mA isolator will render the RS-485 non-operational. Ensure each instrument is not powered when connecting the 4-20 mA.
4. Operation This process turbidimeter allows for the measurement of the turbidity of process water on-line. The turbidity of the process water is usually reported in Nephelometric Turbidity Units (NTU), but may be reported in Formazin Nephelometric Units (FNU). Readings above 1000 NTU (100 for models AM-TBR3) are outside the range of this instrument. Readings above 1100 NTU (110 for models AM-TBR3) will cause the display to flash indicating an over range condition.
The security code (333) must be entered to gain access to CAL or CONFIG menus. Notice that the first number in the code is flashing; the flashing indicates that this is the number to be changed. Use the or arrows to select the first of the three numbers in the code and then press the ↵ button to accept the first number of the code. Now enter the second number in the code. Proceed as with the first number followed by ↵.
5. Instrument Calibration The instrument was calibrated and tested prior to leaving the factory. Therefore, it is possible to use the instrument directly out of the box. Under normal conditions, re-calibration is recommended at least once every three months1. Relay contacts will change to the alarm state while the instrument is in the calibration and/or in the configuration mode.
The arrow beside CAL will be illuminated on the display. The lower display shows alternating 1000 (the value of the standard that is requested) and ↵. The upper display shows the real-time reading to allow the standard to be indexed. Refer to section 6.1 for information on indexing cuvettes. 2. Remove the flow through unit. 3. Insert the requested 1000 NTU standard. Index the standard to the lowest value on the upper display. 4. Press the ↵ button to accept the calibration. 5.
12. Insert the requested 0.02 NTU standard. Index the standard to the lowest value on the upper display. 13. Press the ↵ button to accept the calibration. 14. The lower display will count down the progress of the calibration step. 15. The instrument will return to AUTO mode at the end the calibration. Note: During calibration, the fan inside the instrument is turned off to extend the life of the desiccant.
6. Instrument Offset In certain instances, it may be desirable to use an offset factor to calibrate the instrument rather than performing a physical calibration of the instrument (as described in section 5.2). This procedure is not recommended in lieu of regular instrument calibration but it can be used in situations where the number of instruments used makes regular calibration prohibitive.
7. If the option was turned On, the upper row will display the offset required. This will add or subtract the value of the offset to the measured NTU value. As an example if the AM-TBR measures the process at 0.16 NTU but the laboratory instrument read the sample at 0.12 NTU, adding an offset of –0.04 would result in the AM-TBR displaying 0.12 NTU. 8. Select the desired offset level using the and been set, press the ↵ button to accept it. buttons. Once the desired level has 9.
7. Instrument Configuration (CONFIG mode) The instrument has been designed to provide the ability to customize the instrument according to needs at any time during normal operation. This mode has been split into sub-menus to facilitate instrument configuration. This section describes how to use each of the sub-menus to configure the instrument.
Note: The 4MA can be set higher than the 20 MA level to invert the output current if required. This may be required to control a dosing pump The next, prompt will be the turbidity level assigned to the 20 mA output level (20MA) on the lower row of the LCD display). Select the turbidity level to assign to the 20MA using the and buttons. Once the desired level has been set, press the ↵ button to accept it. The factory setting is 10.00 NTU. 7.3.
Press the ↵ button to continue on and select the desired instrument address using the buttons. Once the selection is satisfactory, press the ↵ button. Select the address using or or buttons. Press the ↵ button to save. To enable the Modbus mode, select ASCII or RTU. For more information refer to a Modbus manual 7.5. Configuring the Alarms Two relays are provided that are designed to operate as two independent programmable alarms.
number of seconds before the alarm activates. If the delay on time is set at 5 seconds and the process turbidity exceeds the set point continuously for only 4 seconds, the alarm will not be activated. However, process turbidity exceeds the set point continuously for 5 seconds or more, the instrument will activate the alarm. Delay Off: The turbidity level must not exceed the alarm set point continuously for at least this number of seconds prior to deactivation of the alarm.
The current selected number of seconds will be shown. Select the desired delay off time for this alarm using the and buttons. Once the desired delay time has been set, press the ↵ button to accept it. After the settings for alarm 1 have been completed, prompts will allow for the set up of the information on alarm #2. 7.5.2. Alarm 2 Repeat the procedure listed in section 7.5.1 to set up the parameters for alarm 2.
buttons. Press the ↵ button to accept it. To avoid reading air and other anomalies, select the slowest speed (highest number). Select the fastest response where monitoring of rapid changes is needed. 7.10. Displayed Resolution The instrument is equipped with the ability to display several levels of resolution. The instrument can display up to four digits to the right of the decimal place for turbidity readings below 10 NTU. The default setting is 0.01 NTU.
Change the brightness by pressing the selected, press the ↵ button. or button. When the desired brightness has been 7.12. Setting the Units The most common unit is NTU (Nephelometric Turbidity Units) however the instrument can display in FNU (Formazin Nephelometric Units). All instruments are shipped from the factory set in NTU mode. Make a selection using the and buttons then press the ↵ button. 7.13.
7.15. Desiccant Alarm When the humidity detector in the AM-TBR indicates that the internal environment is close to the point where humidity could cause condensation, the instrument will display DESC as a screen warning. If desired, a desiccant warning can: 1. Activate the alarms relays. 2. Can activate an alarm condition on the 4-20mA. To activate the alarm relays when the desiccant fails, select set one or both alarms to Error (see section 7.5).
7.16. 4mA Adjustment If the 4-20 mA setting is turned ON (see section 7.2), the following two menus will appear. The first menu outputs a constant 4 mA while allowing for a small amount of adjustment. The adjustment can be made using the and buttons. This adjustment will allow the operator to make the AM-TBR agree with a PLC or SCADA system. The adjustment limits are ± 200 counts or about ± 0.2 mA. This setting will be slightly different on each instrument as each AM-TBR will be factory set to 4.00mA.
8. Additional Features and Options 8.1. Backlit LCD The backlit LCD allows for easier readability of the LCD display in low light or no light conditions. The backlight is intended for continuous operation. The brightness is adjustable from a menu in the CONFIG mode. 8.2. Ultrasonic Cleaning This factory installed option is used to continuously clean the flow through cuvette. It is not intended to clean cuvettes that are already dirty, or replace manual cleaning entirely.
Figure 6 - Operational parts of the Ultrasonic Cleaning System 8.3. RS-485 Outputs The AM-TBR has the capability to operate in three different RS-485 modes for all models. Included is a mode for interfacing into the online software package (section below), and a simple communication mode. A third operating mode is the Modbus communications. All modes will automatically configure and do not require any changes or selections. 8.3.1.
A sample communication would look like this: (Master computer requesting a report from address #1): 1 CRLF (AM-TBR set to address #1 Response):001 0.0249 NTU 8.3.3. Modbus Communication Modbus protocol communication is operational on all models. The Modbus information is covered in a separate manual. 8.4. Flow Alarm (Catalog # 19945A) The flow switch for the AM-TBR is a factory-installed option.
9. Troubleshooting & Maintenance 9.1. AM-TBR Fault Detection The AM-TBR performs continuous diagnostic monitoring. In the AM-TBR there are three levels of fault detection; warnings, errors and failures. Any faults are displayed in a queue form in the bottom row of the LCD. How these faults are indicated depends on the settings made in sections 7.3and 7.5. If ERLV is set to OFF and Alarms are not set to Error, there will be no remote, indication of a problem.
9.3. Diagnostic Chart Symptom Cause Cure Lower display shows MA 4-20 mA loop open Check wiring. See sections 3.3.4 and 7.2 Lower display shows DESC Desiccant pouch bad Change desiccant pouch. See section 10.2 Lower display shows LAMP Lamp failed Replace lamp. Refer to section 10.3 Lower display shows FLOW Sample flow has stopped Restore flow. Contact WA about factory installed option Lower display shows FAIL Major system fault Refer to section 9.1 & 9.
100 School St. Andover, MA 01810 Phone: 978-749-9949 or Toll Free 855-pH-Probe Fax: 978-749-9961 Email: Info@wateranalytics.net www.aquametrix.
10. Routine Maintenance 10.1. Cleaning the Flow Through Cuvette Measurement cuvettes used for both grab sample and the flow through should be clean and free of marks or scratches. Cleaning is accomplished by cleaning the interior and exterior with a detergent solution and then rinsing several times with distilled or de-ionized water. The cuvette can be replaced by first shutting off the flow using the provided shutoff clamp; unscrewing the old cuvette and replacing with a fresh clean one. 10.2.
the instrument, of the new desiccant it will be necessary to reset the instrument by disconnecting the sensor interconnect cable for 2 seconds and then reconnecting it. Note: Once the bag is opened, install the desiccant pouch immediately to prevent premature degradation of the desiccant. 10.3. Replacing the Source Lamp The source lamps in the AM-TBR’s are designed for long life. The IR lamp is rated for 10 years and the white light version is rated for 7 years.
11. Accessories and Replacement Parts List The items shown below are recommended accessories and replacement parts. Accessory Catalog Number White Light Infrared Electronic Service Module For AM-TBR 2 02053 02054 Electronic Service Module For AM-TBR 3 02055 02056 Electronic Service Module For AM-TBR 4 02063 02064 Operating Manual, AM-TBR 24034 ProCal Calibration Kit, .02, 10 & 100 NTU 39953 ProCal Calibration Kit, Full Range, .
12. Warranty Water Analytics Inc., as vendor, warrants to the original purchaser of this instrument that it will be free of defects in material and workmanship, in normal use and service, for a period of one year from date of delivery to the original purchaser. Water Analytics Inc.’s obligation under this warranty is limited to replacing, at its factory, the instrument or any part thereof.
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