ABB ph/orp analyzer and probe package

Transcription

1 Water Technologies & Solutions fact sheet ABB ph/orp analyzer and probe package Series AX466 dual input analyzer description and use AX466 analyzers incorporate the latest technology to provide highly reliable, flexible, feature-packed devices that satisfy a diverse range of process monitoring and control applications. AX466 is used with glass, enamel and antimony ph electrodes and metal Redox sensors, providing measurements with exceptional accuracy and performance. reduced maintenance through in-line cleaning Many installed ph and ORP sensors benefit from regular cleaning. When carried out manually, this can be laborious and costly so is often ignored. Advanced AX466 ORP analyzers make it possible to automate sensor cleaning by using a programmable wash-timer contact to activate a cleaning agent valve or pump. Pulsed water-wash and jet-wash chemical clean actions are standard, user-selectable functions. The frequency and duration of the wash can be tuned to meet the requirements of the application. current output proportional control In this case, the control signal is provided by the 4 to 20mA output of the AX466 analyzers rather than using the alarm/control contacts. The magnitude of the current output changes in proportion to the deviation from set point. This method is used generally with motorized valves or when controlling the speed of dosing pumps with a 4 to 20mA proportional input. specifications - ORP Input resistance Reference 1 x 1013 ohms Range 1200 to +1200mV Minimum span 100mV Temperature compensation modes Automatic or manual Nernstian compensation Range 10 to 200 C (14 to 392 F) Process solution compensation with configurable coefficient Range 10 to 200 C (14 to 392 F) adjustable 0.05 to +0.02%/ C ( 0.02 to %/ F) Temperature sensor Programmable Pt100 Find a contact near you by visiting and clicking on Contact Us. *Trademark of SUEZ; may be registered in one or more countries SUEZ. All rights reserved. AM-FScfABB_pH_ORP_Package_EN.docx Jul-12

2 Slope Between 40 and 105% (low limit user-configurable) Calibration with auto-stability checking Automatic 1 or 2 point calibration selectable from: ABB DIN Merck NIST US Tech 2 x user-defined buffer tables for manual entry, 2-point calibration or single-point process calibration specifications - ph Input resistance Glass >1 x 1013 ohms Reference 1 x 1013 ohms Range 2 to 16pH Minimum span Any 2pH span Resolution 0.01pH Accuracy 0.01pH Temperature compensation modes Automatic or manual Nernstian compensation Range 10 to 200 C (14 to 392 F) Process solution compensation with configurable coefficient Range 10 to 200 C (14 to 392 F) Adjustable 0.05 to +0.02%/ C ( 0.02 to %/ F) Temperature sensor Programmable Pt100 Calibration Ranges 0 to 14pH Slope Between 40 and 105% (low limit user-configurable) number of relays Three supplied as standard Relay contacts Single-pole changeover Rating 5 A, 115/230 V AC, 5 A DC Insulation 2 kv RMS contacts to earth/ground analog outputs Number of current outputs (fully isolated) Two supplied as standard Output range 0-10 ma, 0-20 ma, or 4 20 ma analog output programmable to any value between 0 and 22 ma to indicate system failure Accuracy ±0.25% FSD, ±0.5% of reading (whichever is the greater) Resolution 0.1% at 10 ma, 0.05% at 20 ma Maximum load resistance 750 ohms at 20 ma power supply Voltage requirements 100 to 240 V AC 50/60 Hz Page 2 AM-FScfABB_pH_ORP_Package_EN.docx

3 (90 V Min. to 264 V Max. AC) 12 to 30 V DC Power consumption 10 W Insulation Mains to earth (line to ground) 2 kv RMS environmental data Operating temperature limits 20 to 55 C ( 4 to 131 F) Storage temperature limits 25 to 75 C ( 13 to 167 F) Operating humidity limits Up to 95% RH non condensing approvals, certification and safety Safety approval UL CE Mark CE Mark Covers EMC & LV Directives (including latest version EN 61010) General safety EN Overvoltage Class II on inputs and outputs languages configurable English French German Italian Spanish AM-FScfABB_pH_ORP_Package_EN.docx Page 3

4 overall dimensions Page 4 AM-FScfABB_pH_ORP_Package_EN.docx

5 AP201pH/ORP sensor system The AP201 ph/orp system is designed to provide high reliability and withstand the toughest environments for process monitoring and control. The rugged assembly is built to bear the rigours of weather and process. Parts in contact with the process comprise of 316 stainless steel Insertion systems tolerate temperatures up to 130 C (266 F) and pressures up to 6 bar (90 psi). The inner electrode connections are ingress-protected to IP67/NEMA 6P (exceeds NEMA 4X). AP121/6 Pt Redox (ORP) ± 2000mV 0 to 130 C (32 to 266 F) -AP121/0 General Process 0 to 14 ph 0 to +100 C (32 to 212 F) The heartbeat of the AP201 System is the AP120 Series combination electrode. With high process integrity it delivers low running costs and low replacement outlay. just-in-time maintenance One of the most vulnerable times for a ORP electrode is during reintroduction into the line. Analyzers with advanced diagnostic facilities, such as ABB's AX466 Series, can detect sensor breakages as they occur. In addition, they can detect sensors 'out-of-process' and several reference faults. These valuable facilities enable just-in-time maintenance. The AP201 holder is equipped with an integral solution earth facility. This provides high stability of measurement and enables the transmitter to supply full sensor diagnostics. ph/orp sensor series AP120 with rapid temperature response for critical process The AP121 is a series of highly process-resistant 12mm combination ORP electrodes used in the AP201 System. Some of the benefits available to users are: Exceptional resistance to poisoning and pressure IP67 (NEMA 6P) Ingress Protection High corrosion resistance and steam sterilizability Assured high accuracy of calibration and operation Rapid response enabling tighter process control Unparalleled resistance to plugging Extended life and improved performance exceptional process resistance AP121 electrodes are equipped with a rugged solid electrolyte providing effective resistance to process poisons and fluctuating pressures. This far outstrips the performance of lesser, gelled-slurry type electrodes. The sensor is also backed with an annular, PTFE junction giving excellent dirt-repellence. ORP Probe ph probe reduced maintenance through in-line cleaning 50% of ph sensors in chemical processes benefit from regular cleaning. When done manually, this can be laborious and costly so is often ignored. AM-FScfABB_pH_ORP_Package_EN.docx Page 5

6 The AP201 makes it possible to automate sensor cleaning, driven by advanced Analyzers such as ABB's AX466. The AP201 system earth rod also serves as a jet-spray head enabling the user to supply a periodic burst of cleaning agent across the sensor. This is delivered through two nozzles, one directed at the measuring element and the other at the reference junction. An aggressive, but little-andoften approach, keeps the sensor in prime condition, even in gypsum-laden scrubber applications. Generally, water is a good solvent but, on other occasions, use of an acid, alkali or even detergent is beneficial. Process Connections Stainless steel adapters 1 in. NPT Length of Cable 10 m (33 ft) specifications Materials Shaft and cap Polypropylene Sensor body Ryton* PPS Ground rod/spray tube 316 Stainless steel Jet-wash facility Non-return function Integral one-way valve Spray tube connection 6mm compression fitting SUEZ part numbers Analyzer Package with probes and cables ph Probe Assembly Only with cable ORP Probe Assembly Only with cable Analyzer Only Replacement ORP electrode only Replacement ph electrode only Maximum Sensor Temperature 130 C (266 F) PPS and steel adapters Maximum Sensor Pressure 6 bar (90 25ºC (77ºF) Page 6 AM-FScfABB_pH_ORP_Package_EN.docx