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Water Analytics Aqua Metrix AS Series Installation And Operation Manual

Conductivity sensor with direct 4-20ma output
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AS-TX
AS Series Conductivity Sensor
with direct 4-20mA output
Installation and Operation Manual

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Summary of Contents for Water Analytics Aqua Metrix AS Series

  • Page 1 AS-TX AS Series Conductivity Sensor with direct 4-20mA output Installation and Operation Manual...

  • Page 2: Table Of Contents

    Contents Introduction ............................3 Safety ..............................3 Specifications ............................4 Setup ............................... 5 Wiring to the controller ..........................5 Mounting ..............................5 General Installation Requirements ......................5 Submersion Mounting with the AM-ARM-5 ....................5 Inline Mounting with the AM-TEE-5 ......................6 Operation ..............................

  • Page 3: Introduction

    It is designed to work with our AquaMetrix 2300 as well as virtually any PLC controller with 4-20mA input. Water Analytics built on design experience and feedback from its customers to bring to market the AS-TX sensor. Some of the design improvements include: 1.

  • Page 4: Specifications

    3 Specifications Probe Parameters Sensor type Conductivity CVPC Body Wetted materials Electrodes: 316 SS (cell constants 0.1 and 01) or graphite (cell constants 10) Temperature Elements Embedded 10-200 μS/cm (cell constant 0.1) Measurement Range 100-2,000 μS/cm (cell constant 1) 1,000-25,000 μS/cm (cell constant 10) Factory calibrated Calibration Mode Optional 1-Point in-situ calibration...

  • Page 5: Setup

    4 Setup The AS-TX sensor is factory calibrated and works out of the box. No additional programming is required. Wiring to the controller 1. Before wiring the sensor, make sure the controller is disconnected from live (AC) voltage. 2. Connect the probe wires to the controller according to the wiring diagram shown in Figure 4-1. Figure 4-1 Wiring AS-TX to Current Sinking (top) or Current Sourcing Controllers (bottom).

  • Page 6: Inline Mounting With The Am-Tee-5

    1. Guide the probe cable from the 1” NPT fitting side from the front end of the submersion arm all the way through and back out the back. 2. Loosen the strain relief, thread the cable through, and tighten it. 3.
  • Page 7 To mount the AS-TX probe in the AM-TEE-5: 1. Insert split ring and nut aver the sensor. 2. Screw the AS-TX into the 1” Insert bushing. AS-TX Operating Manual N116-150 rev 4...

  • Page 8: Operation

    3. Slide the bushing assembly into the tee and screw on the compression nut. Install lock nut into a groove to keep the nut attached to the assembly. 6 Operation Maintenance Periodic cleaning is required to remove any coating that has formed on the exterior of the electrodes. Ensure there is no rust forming as well.

  • Page 9: Pc Configuration

    PC configuration: Download and install any terminal emulator that supports serial port (for example: Tera Term, HyperTerminal). We are going to use TeraTerm in the Make sure the USB-RS485 ModBus Converter is plugged in Open Tera Term d. Select Serial and identify correct USB port e.

  • Page 10: Cli Commands

    CLI Commands: TempCoeff Returns the current temperature coefficient. TempCoeff:X Sets the temperature coefficient to a user specified value between 0 and 10 %/°C with up to 2 decimal points. The default temperature coefficient is 2. Temp Returns the current temperature in °C Point20 Point20 –...

  • Page 11: Conductivity Range Selection

    Conductivity Range Selection The AS-TX comes programmed using the following table based on the sensor’s cell constant. If the range needs to be adjusted for whatever reason, follow the steps below. However, please note that if the range is increased, the accuracy of the sensor will decrease. K-Factor Point4 Point20...

  • Page 12: One Point Calibration Using Plc

    One Point Calibration Using PLC If the PLC allows calibration at any point, the user can use a calibration standard or a sample liquid with a known value to make that a calibration point. Calibrating By Adjusting PLC Range In case where a PLC only allows to set 4mA and 20mA points and RS485 commands are not an option to perform calibration, the user can manipulate the 20mA point to achieve better accuracy in a specific point.

  • Page 13: Current Calibration

    Current Calibration Using AM-2252 controller, navigate to Menu --> Diagnostic --> Sensors Output b. In Tera Term window type “CurCal:4” Read mA output from the AM-2252 screen d. Type “CurActual:XXXX” where XXXX is the mA output value (Value should be close to 4.00 mA) e.

  • Page 14: In Field Upgrade

    8 In Field Upgrade: a. Load Tera Term b. Connect yellow, green, and blue wires to RS485-USB adapter c. Provide power to the sensor (red and black wires). Loop wiring is OK. d. Calibration data should appear. If not, power cycle by disconnecting and reconnecting either the red or black wires to the 2252 controller.

  • Page 15: Disposal

    Water Analytics provides this material as-is and makes no warranties, express or implied, regarding its suitability for any specific purpose. Water Analytics shall not be held responsible for any errors or damages, whether incidental or consequential, arising from the use or performance of this material.

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