OWNER’S MANUAL AccUView UV Transmission Monitor HF scientific 3170 Metro Parkway Ft. Myers, FL 33916 Phone: 239-337-2116 Fax: 239-332-7643 E-Mail: HFinfo@Watts.com Website: www.hfscientific.com Catalog No. 24238 (6/10) Rev. 4.
DECLARATION OF CONFORMITY Application of Council Directive Standards to Which Conformity is Declared: Product Safety - Tested and passed CE EN61010-1: 1990 + A1: 1992 (73/32 EEC) st - 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.
Table of Contents Section Page Specifications.....................................................................................................1 1.0 Overview............................................................................................................2 1.1 Unpacking and Inspection of the Instrument and Accessories .............2 1.2 The Display ...........................................................................................3 1.3 The Touch Pad ..................................
Table of Contents (continued) Section Page 7.4 Configuring the Alarms ...................................................................................18 7.4.1 Alarm 1 ....................................................................................18 7.4.2 Alarm 2 ...................................................................................19 7.5 Offset Calibration.................................................................................19 7.6 Enabling the Security Access..............
Specifications Measurement Range 0 – 100.0 %T Reproducibility ± 0.1 %T Resolution 0.1 % T Accuracy ± 1.0 % T Response Time Adjustable Averaging Path Length 22 mm(Readings corrected to 10 mm) Display Multi-Line Liquid Crystal Backlit Display Alarms Two Programmable, 120-240VAC 2A Form C Relay Analog Output Powered loop isolator 4-20 mA, 600 Ω drive Communications Port Optional bi-directional RS-485 with Modbus Maximum Water Pressure 1380 kPa (200 psi.
1.0 Overview The AccUView process transmission monitor allows for the UV transmission measurement of process water on-line. A unique feature of the instrument is the ultrasonic cleaning. Refer to section 8.2 for more information. 1.1 Unpacking and Inspection of the Instrument and Accessories The table below indicates the items in the monitor shipment.
1.2 The Display Figure 1 illustrates all the items that can appear on the display. The upper row of the display (1) is used for reporting the % T levels and to provide user guidance in the customer setting routine. The lower row of the display (2) is used to communicate error messages and provide user guidance. All error messages will be added to a queue along with the units (%T). The display has two icons (3) that are used to indicate the use of access code and offset mode.
1.4 Vapor Purge The AccUView 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 AccUView monitors the replaceable desiccant pouch condition continuously.
3.0 Installation and Commissioning Prior to use for the first time, the supplied desiccant pouch will need to be installed. Refer to section 9.2 Replacing or Installing the Desiccant Pouch. 3.1 Mounting & Site Selection The instrument is designed for wall mounting. For ease of service there should be about 20 cm (8”) free area above the instrument; this will ensure enough room for calibration and cuvette maintenance.
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). Flow requirements are 100ml/min. – 1 liter/min. (0.026-0.26Gal/min). The integral flow regulator will limit flow to around 1 liter/min. The pressure regulator will allow for a maximum pressure of 1380kPa (200 PSI.). The maximum allowable fluid temperature is 50°C (122°F).
3.2.1 Pressurized Systems: A standard feature of the AccUView is a pressure regulator. The regulator is rated for use up to 1380 kPa (200 PSI) and will lower the pressure down to a pressure more suitable for use in the AccUView. If inlet pressures can exceed 325 kPa (47 PSI) use appropriate tubing to connect to the AccUView. The integral flow regulator will limit the flow to 1 liter per minute. 3.2.2 Drain Vent: The AccUView has been fitted with a drain vent in the “OUT” bulkhead fitting.
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 AccUView is not supplied with a power cord. 3.3.
4.0 Operation This process monitor allows for the measurement of the transmission of process water online. Process water is usually reported in units of %T. Readings above 102 %T are indicated by a flashing display. Readings above 100 %T indicate that the current sample is better than the calibration water. Readings above 110 %T are not possible. All readings are path length corrected to 10 cm. During normal operation, the instrument will have the arrow beside AUTO.
4.3 Security Access Feature The instrument is equipped with a security access code feature that can be activated in the configuration mode. If the security feature is enabled, the screen shown in the illustration below will appear when the MODE/EXIT button is pressed. 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 entered.
5.0 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, recalibration is recommended at least once every month. To get the greatest accuracy, you may need to calibrate once per week. Two cuvettes are supplied with the instrument so that they can be exchanged with each other. One cuvette should always be kept clean for replacement when calibrating.
Since the instrument stored the reading previous to calibration, this reading will appear after calibration for at least 30 seconds. The reading will then update to the current reading. How fast this upgrades occurs depends on the CONFIG settings for RESP (response time) and UV-T ( lamp duty cycle). Note: It is recommended that the flow through unit be removed for as short an interval as possible to prevent premature saturation of the desiccant.
6.0 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 5.1). 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.
8. This completes the offset configuration. 9. At this point, the instrument will continue through the configuration (CONFIG) mode of the instrument or press MODE/EXIT to return to the AUTO mode. 6.1 Restoring Factory Settings If the instrument is unable to perform a calibration due to a low lamp output, bad calibration standard or a dirty cuvette, the instrument will display CAL on the lower row of the display and Err on the upper row. The operator has two choices to correct this problem.
7.0 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.
7.2.1 Setting the 4 mA Level Select the %T level to assign to the 4MA using the t and u buttons. The factory setting is 90%T. Once the desired level has been set, press the ↵ button to accept it. Note: The 4MA cannot be set higher than the 20 MA level. 7.2.2 Setting the 20 mA Level The next, prompt will be the %T level assigned to the 20 mA output level (20MA) on the lower row of the LCD display). Select the %T level to assign to the 20MA using the t and u buttons.
7.3 Configuring the RS–485 Port If the instrument is wired for this option, and the I/O selection is changed to 485, prompts will appear for setting the baud rate and the address. 7.3.1 Setting the Baud rate Select the correct baud rate (1200, 2400, 4800, 9600, or 19200) for operation of the I/O port by pressing the t or u buttons to change the displayed baud rate. The factory setting is 9600 baud. Press the ↵ button to continue on and select the desired instrument address using the t or u buttons.
7.4 Configuring the Alarms Two relays are provided that are designed to operate as two independent programmable alarms. Three types of information must be input to fully program each alarm: 1. The alarm function (HI, LO, OFF or Error) 2. The alarm set point (level at which the alarm activates) 3.
Alarm 1 Set Point: This prompt is used to select the set point for this alarm; this is indicated by “S/P” shown on the lower row of the display. Select the desired alarm level by using the t and u buttons. Once the desired set point has been set, press the ↵ button to accept it. Alarm 1 Delay Times: Delay On: The following display will appear to allow to select the number of seconds currently set for the “delay on” time. The current selected number of seconds will be shown.
7.6 Enabling the Security Access The instrument is equipped with a security access. If this option is turned on, the user is required to input the access code into the instrument to get to any mode other than AUTO. The only code is 333. This code may not be changed. See section 4.3 for more information on this security feature. The security key icon will be visible and flashing on the display whenever the access option is selected using the t or u buttons. (On or OFF). 7.
7.9 LCD Backlight Brightness The LCD backlight brightness may need to be adjusted. This is of particular interest if multiple instruments are located in the same area and it is desired for the entire group to have the same appearance. Ten levels are available. The factory brightness is 8. Change the brightness by pressing the t or u button. When the desired brightness has been selected, press the ↵ button. 7.
7.12 RS-485 Parameter – Parity In the Parity menu selections are no parity (nOnE), odd parity (Odd) or even parity (E). The default selection is no parity. Make a selection using the t and u buttons then press the ↵ button. The factory setting is no parity. 7.13 RS-485 Parameter – Stop Bits For stop bits the choices are 1 or 2 stop bits. The default selection is 1 stop bit. Make a selection using the t and u buttons then press the ↵ button. The factory setting is 1 stop bit. 7.
7.15 Desiccant Alarm When the humidity detector in the AccUView indicates that the internal environment is close to the point where humidity could cause condensation, the instrument will display DESC as a warning. If desired, a desiccant warning can activate the alarms and send the 4-20mA to 2mA. To activate the alarms when the desiccant fails, select On in the DESC menu. The default for this menu is OFF. Make selections using the t and u buttons then press the ↵ button to move to return to AUTO mode. 7.
7.18 Saving Configuration Settings If extended settings is set to OFF, pressing the ↵ button will save all settings and the AccUView will automatically return to the normal AUTO mode of the instrument. If extended settings is set to On, after the last menu of the extended settings, pressing the ↵ button will save all settings and the AccUView will automatically return to the normal AUTO mode of the instrument. The CONFIG menu may be used at any time to reset or change any of the parameters.
8.0 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 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.
8.3.2 Simple Communication The AccUView can provide basic communications over simple programs such as the Hilgraeve HyperTerminal that is included with most Microsoft Windows packages. The user could also use Visual Basic or other programs. The default communication parameters are 8 bits, no parity and 1 stop bit. These parameters may be changed in the extended CONFIG menu.
9.0 Routine Maintenance 9.1 Cleaning the Flow Through Cuvette Measurement cuvettes used for 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.
10.0 Troubleshooting 10.1 AccUView Fault Detection The AccUView performs continuous diagnostic monitoring. In the AccUView 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. A warning is simply a screen indication of a problem. No alarms are activated. If the desiccant alarm is turned off and the desiccant becomes saturated, a screen warning of DESC will appear.
10.3 Diagnostic Chart Symptom Cause Cure Lower display shows MA 4-20 mA loop open Lower display shows DESC Desiccant pouch bad Lower display shows LAMP Lower display shows FLOW (if flow option installed) Lower display shows CLN Lower display shows CAL Err after a calibration. Lower display shows TECO Lamp failed Sample flow has stopped Check wiring. See sections 3.3.4 and 7.2 Change desiccant pouch. See section 9.2 Replace lamp. Refer to section 9.3 Restore flow.
11.0 Accessories and Replacement Parts List The items shown below are recommended accessories and replacement parts. Accessory Replacement Desiccant Pouch Catalog Number 21555R 100 % T Calibration Solution - 500 ml 19323 UV Lamp Replacement Module (Exchange price item-no discounts) 01957 Quartz Replacement Cuvette with Ultrasonic Transducer 24232S Operating Manual, AccUView 24238 HF Online Software for data collection and reporting 19783 Flow Regulator, 1000ml/min.
12.0 Warranty HF scientific, 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. HF scientific’s obligation under this warranty is limited to replacing, at its factory, the instrument or any part thereof.
