What are the instructions for connecting an AF7000 Streaming Current Monitor to an sc Controller.

Document ID

Document ID TE12319

Published Date

Published Date 02/18/2020
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Question
What are the instructions for connecting an AF7000 Streaming Current Monitor to an sc Controller.
Summary
Instructions for connecting an AF7000 to either an sc200 or sc1000.
Answer

Introduction:


The AF7000 Streaming Current Monitor can be connected to the sc family of controller through the use of the controller's 4-20 mA input module. While this configuration will only provide information on the distance that the sample water is from the desired set point, it will allow the user to have expanded alarm options and PID control. Make sure to have both the instrument and the controller wired together before both devices are powered.

Items needed:

  • AF7000 controller equiped with 4-20 mA output card
  • sc controlelr with 4-20 mA input module
  • Sufficient analog wiring to cover distance between instrument and controller

AF7000 Configuration:


First, configure the AF7000 to ouput it's streaming current value using the 4-20 mA output card. Make sure that a jar test has been performed to determine the optimum coagulant value.
  1. On the AF7000 press the Menu Button.
  2. Press the down button until 4-20 is shown on the lower screen. The number of times necessary to reach this menu is dependent on what other cards are installed. Press Enter.
  3. Rd 4 will display on the lower screen. Press Enter and use the up and down arrows to set the 4 mA output value. The default value is -10.
  4. Press the Menu and the down button so that the Rd 20 is displayed in the lower screen. Press the Enter and use the up and down arrows to set the 20 mA output value. The default value is +10.
  5. Press Menu until the streaming current value returns.

Configuration of the sc200:


For information on installation of the 4-20 mA input module for the sc200 (Product # 9012800), see both the controller user manual and the 4-20 mA input module manual .
  1. Press menu to enter the controller's setup menu. From the setting menu, select Sensor Setup.
  2. Select the 4-20 mA Input module.
  3. Select Configure.
  4. Highlight select scale and choose the scale to be 4-20 mA.
  5. Press the back button and choose set resolution. Set the controller's resolution to match the resolution of the AF7000.
  6. Press the back button and choose signal average. The AF7000 already has an option for signal averaging, so choosing to signal average on the controller will double the averaging from the instrument. To have the readings ont he controller and the AF7000 to match, choose 0.
  7. Press the back button and choose edit name. This is a user configurable field  that names the input module for ease of identification when sending data from the controller. Using the up and down keys to choose characters and the left and right key to choose position, enter the instrument name.
  8. Press the back button and choose edit units. The units from the AF7000 are SCU (Streaming current Units). Using the up and down keys to choose characters and the left and right key to choose posistion, enter SCU for instrument units.
  9. Press the back button and choose Display range. Choose the 20 mA value and set the 20 mA value to the value chose on the AF7000.
  10. Press the back button and choose 4 mA value and set the 4 mA value to the value chosen on the AF7000.
  11. Return to the sc200 instrument home screen.

Configuration of the sc1000:


For information on installation of the 4-20 mA input module for the sc1000, see sc1000 Universal Controller User Manual.
  1. Press menu to enter the controller's setup menu. From the settings menu, select sc1000 setup.
  2. Select current inputs.
  3. Select mA input INT/EXT
  4. Choose the appropriate input card.
  5. Select set function and choose analog.
  6. Highlight Scale 0 mA/4 mA and choose the scale to be 4-20 mA.
  7. Choose to set the high (20 mA) value to the value chosen on the AF7000.
  8. Press the back button and choose to set the low (4 mA) value to the value chosen on the AF7000.
  9. Press the back button and choose edit name. This is a user configurable field that names the input module for ease of identification when sending data from the controller. Using the up and down keys to choose characters and the left and right key to choose position, enter the instrument name.
  10. Press the back button and choose Unit. The units from the AF7000 are SCU (Streaming Current Units). Using the up and down keys to choose character and the left and right keys to choose position, enter SCU for the instrument units.
  11. Return to the sc1000 instrument home screen.
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