ASTI - Model 3TX-HiQ - Digital Measurement System
From ASTI Transmitters
3TX-HiQ Digital Measurement System for Superior & Cost-Effective Monitoring, Control and Datalogging of pH, ORP & Temperature Process Parameters.
Simplify commissioning & maintenance with smar...
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Simplify commissioning & maintenance with smart digital plug and play sensors & intelligent digital transmitters
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Available for both continuous measurements & portable intermittent use
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Lowest startup and ongoing cost of ownership of any digital measurement platform
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Proprietary solid-state reference system for long-life & low-maintenance
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Suitable for abrasive slurries, solvents and high pressures & temperatures
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Sensors are built-to-order allowing for extensive customization
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Robust industrial construction handles the most difficult severe service measurements
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Inline, immersion, submersible, sanitary & HOT-TAP valve retractable style process installations supported
Quad channel smart digital pH & ORP measuremen...
Quad channel smart digital pH & ORP measurement system in NEMA 4X waterproof 5MF enclosure. Alternate configuration allows for packages anywhere from single channel and all the way up to nine (9) measurements to be performed in a one integrated field package.
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HiQDT SMART DIGITAL MODBUS RTU pH & ORP SENSORS FOR DIRECT CONNECTION TO ANY PLC, HMI, SCADA or any other data acquisition or control device that can serve as the MODBUS RTU master.
- The PLC or HMI employed can either be customer supplied or else ASTI supplied as a part of a turn-key ready system ready for plug and play field commissioning right out of the box.
- ASTI supplied HMI & PLC include options for advanced smart touchscreen controllers with full remote access suitable use in for Class I, Division II hazardous locations as well as Explosion-Proof controller suitable for use in hazardous Class I, Division I EX rated locations. Lower cost instrumentation options also exist for use in safe non-hazardous locations as well as blind installations if no local display is required.
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Smart Digital IOTRONTM pH Sensors & ORP Sensors for Intelligent 3TX-HiQ-pH pH & ORP Transmitters are the most cost-effective & rugged industrial smart digital pH & ORP measurement system available.
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Intelligent management of calibrations with true plug and play digital sensors. Calibrate anywhere and hot-swap interchange the sensor in and out of field service with rugged industrial NEMA 6P snap connector.
- Calibration values are automatically loaded when Smart Digital IOTRONTM pH Sensors & ORP Sensors are connected to Intelligent 3TX-HiQ-pH Transmitter. No user action of any kind nor any contact with the transmitter is required for exchange of a sensor. In this way sensors can be removed and installed between different transmitters at will as may be desired.
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Intelligent installation management: Create and upload complete transmitter configuration to smart digital sensor or download complete transmitter configuration from smart digital sensor to transmitter. Shadow copy feature allows for easy reverting to previous configuration.
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Optimized commissioning & maintenance: Track smart digital sensor initial installation and last used in field dates plus total service time usage. The tracking of this information over the course of time allows for an optimization of stocking levels to further reduce the cost of ownership.
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All aspects of installation are completely portable from the shop to the field.
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Leading novel and proprietary solid-state industrial pH sensor & ORP sensor design and technology combined with built-to-order extensively configurable manufacturing offer the best possible service lifetime at the most cost effective pricepoint. Review the Competitive Advantages of Design & Technology for IOTRON™ & ZEUS™ Industrial pH & ORP Sensors webpage for details.
Sensor Calibration Features & Installation Management
- Calibration data is stored on smart digital sensor. Calibrate in the lab or instrument shop & snap pre-calibrated sensor into process use. Plug & play sensors can be swapped in and out at will.
- No contact with transmitter of any kind is required for an operator to change out a sensor.
- Calibration values automatically loaded from digital sensor to 3TX-HiQ-pH transmitter.
- Install & swap out for maintenance like cleaning, re-calibration or replacement is quick, easy & simple.
- Rugged field-ready snap connector standard: Smart digital sensors come with 6 meters (20 feet) cable terminated with NEMA 6P & IP67 rated quick disconnect waterproof & corrosion-resistant snap connector. No screwdrivers are ever needed to install or change out a smart digital sensor.
- Total cable length up to 610 meters (2,000 feet) using extension cables with mating rugged NEMA 6P & IP67 quick disconnect waterproof & corrosion-resistant snap connector terminations.
- Automatic pH calibration recognizes 4.00, 6.86, 7.00, 9.18 & 10.00 pH buffers for 1-point, 2-point and 3-point calibrations with built-in correction for temperature induced changes to pH buffers
- See plot of exact pH value of common pH buffers as a function of temperature for visualization of this temperature dependence that is corrected in the 3TX-HiQ-pH automatic calibration mode. Note that this is an altogether different correction than the Nernstian temperature compensation for the pH sensor potential itself. This correction for the value of the pH buffer is a temperature induce equilibrium shift of the measured solution.
- Manual pH calibration allows offset & slope adjustment to any pH buffer or grab sample reference value
- Display previous five calibration sets on transmitter & the date that correspond to each one. Historical & current calibrations can be viewed and saved to track calibrations through sensor lifecycle.
- Total time in field service use is logged on sensor for systematic tracking of complete sensor life cycle to allow for best practice installation, maintenance and inventory/stocking management
- Min and max temperatures in use digitally stamped on sensor for process condition tracking
- Calibrate the smart digital sensor on Windows software as well as on 3TX-HiQ-pH transmitter
- Calibration values can be hard reset back to the ASTI factory defaults (configuration unchanged)
Transmitter Configuration Management Features
Overall 3TX-HiQ-pH Measurement System Functionality
- One pH/ORP transmitter for all your needs: -2 to +16 pH range services all possible pH installs. The -1,000 to +1,000 mV ORP range services nearly all possible practical field ORP applications.
- Analog 0-20mA or 4-20mA output can be scaled to 1pH to get an effective output resolution of 0.001pH units or else down to 100mV to get a net output resolution of 0.1mV for any part of the ORP range.
- The RS-485 MODbus RTU output mode can be set to achieve a 0.001pH or 0.1mV resolution for best precision or set to a lower 0.01pH and 1mV resolution mode to achieve compatibility with the 3TX-DAT MODbus field datalogger or else if the higher resolution mode is simply not desired
- 3TX-HiQ-pH transmitter comes standard with both scalable analog 0-20mA or 4-20mA to support legacy control systems & RS-485 MODBUS for use with more modern digital control systems.
- Commissioning new field installations using RS-485 MODBUS RTU digital output is as simple as daisy-chain wiring together all installed 3TX-HiQ transmitters and assigning the node address for each module.
- The MODBUS protocol allows for the flexibility to add or remove nodes at will and avoid any potential ground loops issues.
- Analog output is galvanically isolated from the sensor input, scalable linear and fully reversible.
- User adjustable temperature compensation coefficient for special sensors & critical applications.
- Automatic temperature compensation (ATC) from -40 to +210°C ensures accurate pH readings.
- Analog and digital outputs are placed on hold automatically when in calibration mode. When calibration mode is entered, the last value from measurement mode will be held for both the 4-20mA analog output as well as the MODbus output.
- Active 4-20mA can support remote external displays to allow for viewing measured values in control panels, secondary field locations, or instrumentation shops.
- An example of how to connect a single 4-20mA output to multiple devices is provided in this drawing
- Although all of the 3TX transmitters are 3-wire devices they can be powered with installations that are designed for 2-wire loop-powered devices by using the following 2-wire to 3-wire installation scheme. Please review the 3TX FAQ for the typical 3-wire power and output installation scheme for the 3TX modules.
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