Analyze IT Single and Dual Input Analyzers for ph/redox (ORP)

Transcription

1 Data Sheet Analyze IT Single and Dual Input Analyzers for ph/redox (ORP) Cost effective select from two input ph/redox (ORP) or combined ph/redox (ORP) and conductivity in one analyzer High functionality at minimum cost three alarms and two fully isolated current outputs as standard Add-on option card provides flexible and versatile operation maximum five alarm relays and four fully isolated current outputs On line diagnostics provide confidence in performance while reducing operating costs P, PI, PID Control Model AX460 pulse length, pulse frequency and analog all supplied as standard Versatile power supply options 85V to 265V AC 12V to 30V DC available as an option Water wash/chemical clean two forms of cleaning to satisfy a wide range of applications and reduce maintenance costs High performance, high functionality single and dual input ph Analyzers for all types of industry

2 The AX400 Series The AX400 Single and Dual Input ph Analyzers incorporate the latest technology and innovative design, providing flexible feature-packed instruments capable of satisfying a wide and diverse range of applications. The AX460 Single Input version can be easily upgraded to a Dual Input version simply by adding a second input card. It is not possible to upgrade a single input version and retain PID capability. AX400 Series analyzers are available for either wall-/pipe- or panel-mounting and are rated to IP66/NEMA 4X*. Energy Saving Display The backlit display has been designed to operate in all types of environments, and shows both the measured parameter(s) and a 16-character display line for diagnostic and computed information. On dual input analyzers both measured parameters are displayed simultaneously. The backlight can be set to automatically switch off after 60s of inactivity. High Functionality as Standard All versions are supplied with two, fully isolated current outputs that can be assigned to either the measured variable (ph or Redox [ORP]) or the sample temperature. Three programmable relay set points are available which can also be assigned as required. Innovative features such as power-saving display, diagnostic current output option for sensor status and three choices of PID control (available on single input versions only) provide the user with a formidable array of control capability. Versatile Power Supply Options The AX400 Analyzers are supplied as standard for 85 to 265V AC operation. They can also be provided for 24V AC, or 12 to 30V DC, supply and recognize automatically which of the two supplies is being used. This reduces maintenance costs significantly by negating the need for costly safety tests to ensure compliance with safety procedures. Display Showing Sample Temperature Coefficient Setting Easy-Access Installation Terminals Easy access to the terminations ensures rapid and costeffective installation. The wall-/pipe-mount version has been designed to ensure that cable connection is simple and convenient and that the IP rating of the electronics section is retained when the terminal compartment cover is removed. Expanded User Flexibility An advanced option card provides an additional two current outputs and two further alarm relays, which can also be assigned to the ph value or sample temperature A real-time clock and ph log book, to record alarm events and electrode status etc., are also included within this powerful option card. AX400 Termination Chamber Makes Access Easy *Rating applies to front panel only on panel-mount versions. 2

3 Dual Input ph or Redox (ORP) The AX466 enables two continuous measurements of ph or Redox (ORP) with simultaneous local display and retransmission. The option card, which provides additional relays and analog outputs, enables all measured values and sample temperatures to be retransmitted simultaneously. Increasingly this capability is being utilized to provide an on-line validation of the process measurement. Making two simultaneous measurements and configuring one of the set points as a difference alarm provides continuous on-line validation and an early warning of malfunction of the measurement. Water Wash and Chemical Clean Water wash and chemical clean are standard features that are user-selectable. The frequency and duration of the wash can be tuned to meet the needs of the application. For the chemical cleaner a 60 litre (13 gallons) tank, complete with delivery pump and low level alarm, can be ordered separately. This has proven particularly successful on potable drinking water plants where manganese and iron in the sample has created unacceptably high levels of maintenance. Effective cleaning reduces cost of ownership. Integral P, PI and PID Control The single input AX460 incorporates three-term PID Control, offering the user three modes of sophisticated control to select from: analog, pulse length (time proportional) and pulse frequency. These are supplied as standard and can be operated in direct- or reverse-acting mode, dependent upon the application. Bi-directional for Acid/Base Addition As well as single set point control for both acid and base addition, the analyzer can be configured to control both acid and base functions. To avoid control overlap a minimum of 0.5pH difference between the set points is essential. This difference between the set points varies, depending on the application. PID function is only available on single control set point operations. Combination Conductivity/pH Redox (ORP) Display Combined Conductivity and ph The AX416 version enables conductivity and ph to be measured in the same unit. The option card provides the capability to retransmit ph, conductivity and both sample temperatures. Five programmable alarms, that can be assigned to suit the needs of the application, enable even the most demanding requirements to be met. Auto/Manual and Bumpless Transfer An auto/manual feature is incorporated and is readily accessible for rapid manual intervention if it's necessary to take over from the controller. The controller facilitates bumpless transfer from manual to auto (and vice versa) providing the measured variable is within the proportional band and some integral action time has been programmed. Power Failure Recovery In the event of a power failure the user can configure the control mode to be Auto, Manual or Last. This optimizes control conditions on power-up to ensure rapid recovery of process control. 3

4 AX460 Single Input Only Time Proportioning Control Time proportioning control operates by energising and deenergising relays for time periods depending on the difference between the set point and measured variable values (also known as mark/space control). The greater the difference the longer the relay remains energized. With no output the relay is permanently de-energized. With an output the relay is energized for a proportion of the cycle time equal to the percentage output. This technique is particularly suited for control of solenoid valve dosing. Permanently de-energized Output = 0% Energized De-energized 2.5 seconds 7.5 seconds Output = 25% Energized De-energized 5 seconds 5 seconds Output = 50% Energized De-energized 7.5 seconds 2.5 seconds Output = 75% Cycle time = 10 seconds Time Proportioning Control Bi-directional As well as single set point control for both acid and base addition, the analyzer can be configured to control both acid and base functions. To avoid control overlap a minimum of 0.5pH difference between the set points is essential. This difference between the set points varies depending on the application. PID function is only available on single control set point operations. Pulse Frequency Control Pulse frequency control operates by pulsing a relay on for 300ms and off for a period of time determined by the pulse frequency. The pulse frequency (PFr) can be adjusted between 1 and 120 pulses per minute. The greater the difference between the measured variable and the set point the greater the pulse frequency. 100% Control Output 0% 0 Low Set Point ph High Set Point 14 Example If the pulse frequency is set at 120 pulses per minute and the percentage output is 100% then the pulse rate is 2 pulses per second see below. Reduce the percentage output to 50% and the pulse rate is one pulse per second. This method is particularly useful in the control of diaphragm metering pumps. Bi-directional Control On (a) 300ms 200ms 300ms 200ms 300ms 200ms 300ms 200ms On (b) 300ms 700ms 300ms 700ms Pulse Frequency Control 4

5 Specification ph /Redox (ORP) Inputs 1 or 2* ph or mv inputs and solution earth 1 or 2* temperature sensors Enables connection to glass or enamel ph and reference sensors and Redox (ORP) sensors *AX466 only Input resistance Glass > 1 x Ω Reference 1 x Ω Range 2 to 16pH or 1200 to +1200mV Minimum span Any 2pH span or 100mV Resolution 0.01pH Accuracy 0.01pH Temperature compensation modes Automatic or manual Nernstian compensation Range 10 to 150 C (14 to 302 F) Process solution compensation with configurable coefficient Range 0 to 100 C (32 to 212 F) Temperature sensor Programmable Pt100, Pt1000 & Balco 3kΩ Calibration Ranges Check value (zero point) 0 to 14pH Slope Between 40 and 105% (low limit user configurable) Electrode Calibration Modes 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 or 2-point calibration or one-point process calibration Conductivity AX416 Only Range Programmable 0 to 0.5 to 0 to 10000µS/cm (with various cell constants) Minumum span 10 x cell constant Maximum span 10,000 x cell constant Units of measure µs/cm, µs/m, ms/cm, ms/m, MΩ-cm and TDS Accuracy Better than ±0.01% of span (0 to 100µS/cm) Better than ±1% of reading (10,1000µS/cm) Operating temperature range 10 to 150 C (14 to 302 F) Temperature compensation 10 to 150 C (14 to 302 F) Temperature coefficient Programmable 0 to 5%/ C and fixed temperature compensation curves (programmable) for acids, neutral salts and ammonia Temperature sensor Programmable Pt100 /Pt1000 Reference Temperature 25 C (77 F) Display Type Dual 5-digit, 7-segment backlit LCD Information 16-character, single line dot-matrix Energy-saving function Backlit LCD configurable as ON or Auto Off after 60s Logbook (with option board) Electronic record of major process events and calibration data Real-time clock (with option board) Records time for logbook and auto-manual functions 5

6 Specification Set Points, Relays and Outputs Number of set points 3 supplied as standard or 5 with option card fitted Number of relays* 2 supplied as standard or 4 with option card fitted Number of analog outputs* (fully isolated) 2 supplied as standard or 4 with option card fitted Relay Outputs On/Off Number of relays 3 supplied as standard 5 with option card fitted Set point adjustment Fully configurable as normal or failsafe high/low or diagnostic alert Hysteresis of reading Programmable 0 to 5% in 0.1% increments Delay Programmable 0 to 60s in 1s intervals Relay contacts Single-pole changeover Rating 5A, 115/230V AC, 5A DC Insulation 2kV RMS contacts to earth/ground Analog Outputs Number of outputs (fully isolated) 2 current outputs supplied as standard 4 current outputs with option card fitted Output current 0 to 10mA, 0 to 20mA or 4 to 20mA Analog output programmable to any value between 0 and 22mA to indicate system failure Accuracy ±0.25% FSD, ±5% of reading Resolution 0.1% at 10mA 0.05% at 20mA Maximum load resistance 750Ω at 20mA Control Function AX460 Only Controller Type P, PI, PID (Configurable) Control Outputs Analog Current output control (0 to 100%) Time proportioning cycle time 1.0 to 300.0s, programmable in increments of 0.1s Pulse frequency 1 to 120 pulses per minute, programmable in increments of 1 pulse per minute Controller action Reverse, direct or bi-directional (programmable) Proportional band 0.1 to 999.9%, programmable in increments of 0.1% Integral action time (Reset) 1 to 7200s, programmable in increments of 1s (0 = Off) Derivative 0.1 to 999.9s in increments of 0.1s only available for single set point control Auto/Manual User-programmable Access to Functions Direct keypad access Measurement, maintenance, configuration, diagnostics or service functions Performed without external equipment or internal jumpers Sensor cleaning function Configurable cleaning action relay contact Continuous Pulse in 1s on and off times Frequency 5 minutes to 24 hours, fully configurable Duration 15s to 10 minutes, fully configurable Recovery period 30s to 5 minutes, fully configurable Configuration Can be assigned to either measured variable or either sample temperature Serial communications Modbus serial data interface * For AX460 PID versions the control output can be assigned a maximum of 2 relays, 2 analog outputs or 1 of each 6

7 Mechanical Data Wall-/Pipe-mount versions IP66/NEMA4X Dimensions 192mm high x 230mm wide x 94mm deep (7.56 in. high x 9.06 in. wide x 3.7 in. deep) Weight 1kg (2.2 lb) Panel-mount versions IP66/NEMA4X (front only) Dimensions 96mm x 96mm x 162mm deep (3.78 in. x 3.78 in. x 6.38 in. deep) Weight 0.6kg (1.32 lb) Cable Entry Types Standard 5 or 7* x M20 cable glands N. American *7 x knockouts suitable for 1 /2 in. Hubble gland Power supply Voltage requirements 85 to 265V AC 50/60 Hz 24V AC or 12 to 30V DC (optional) Power consumption <10VA Insulation Mains to earth (line to ground) 2kV RMS Environmental Data Operating temperature limits 20 to 65 C ( 4 to 149 F) Storage temperature limits 25 to 75 C ( 13 to 167 F) Operating humidity limits Up to 95%RH non condensing EMC Emissions and immunity Meets requirements of: EN61326 (for an industrial environment) EN EN Hazardous area approvals CENELEC ATEX IIG EEx n IIC T4 FM non-incendive Class I Div. 2 Groups A to D CSA non-incendive Class I Div. 2 Groups A to D Safety General safety EN Overvoltage Class II on inputs and outputs Pollution category 2 Pending Pending Pending Languages Languages configurable English French German Italian Spanish 7

8 Overall Dimensions Dimensions in mm (in.) 210 (8.27) 192 (7.56) R10 (0.4) 96 (3.78) 150 (5.9) 175 (6.9) 192 (7.56) Ø6.50 (0.26) 25 (1) 23 (0.9) 25 (1) 94 (3.7) 22.5 (0.88) (0.88) (1.77) 45 (1.77) 67.5 (2.66) 67.5 (2.66) Wall-/Pipe-mount Version Pipe-mount Details 8

9 Dimensions in mm (in.) (3.60) (5.41) 25 (1) 96 (3.77) (3.60) 96 (3.77) 5.40 (0.21) Panel-mount Version 9

10 Electrical Connections Wall-/Pipe-mount Analyzer Panel-mount Analyzer Terminal Block A Terminal Block C (Analog Option Board) Terminal Block B Terminal Block C (Analog Option Board) Common Third Lead THC Earth (Ground) Stud Terminal Block A Terminal Block B Terminal block A L Live N Neutral E Earth A4 C A5 NC Relay 1 A6 NO A7 C A8 NC Relay 2 A9 NO A10 C A11 NC Relay 3 A12 NO A13 + Analog output 1 A14 A15 + Analog output 2 A16 Terminal Block C (Analog Option Board) C1 C2 C3 C4 C5 C6 Earth C7 C C8 NC Relay 4 C9 NO C10 C C11 NC Relay 5 C12 NO C13 + Analog output 3 C14 C15 + Analog output 4 C16 Terminal Block B (see table below) B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 B13 B14 B15 B16 T erminal Block B ph/redox (ORP) ph/redox (ORP) Sensor B Sensor A w ithout Solution Earth w ith Solution Earth Conductivity 1 9 T HC common*, Link 1 & 2 / 9 & 10* * T HC common*, Link 1 & 2 / 9 & 10* * THC common, Link 1 & 2 / 9 & 10* * 2 10 T HC third lead* THC third lead* THC third lead 3 11 T HC* THC* THC 4 12 N/ A Reference Electrode Screen 5 13 Not used N ot used Cell (Cell Electrode) 6 14 R eference Electrode S olution Earth Cell (Earth Electrode) 7 15 S creen* Screen* Not used 8 16 Glass/Metal Electrode Glass/Metal Electrode Not used *If fitted. **When a 2-wire Pt100, Pt1000 or BALCO temperature compensator is fitted. Solution Earth also referred to as Ground Rod. THC = Temperature compensator. 10

11 Ordering Information Single & Dual Input Analyzers for ph and Conductivity AX4 X X X X X 0 X First Process Variable (PV1)* Conductivity ph/redox (ORP) U SP<645> Conductivity ** Second Process Variable (PV2)* No second process variable select for PID control ph ph/redox (ORP) Conductivity ** USP<645> Conductivity** Enclosure Types European types Wall cable glands fitted Wall complete with pipe-mount bracket Panel N. American Wall Pipe Panel types Advanced Functions Basic (2 current outputs + 3 relays) Advanced (2 additional current outputs + 2 additional relays + real-time clock) Advanced (Modbus + real-time clock) Power Supply 85 to 265V AC 45 to 65Hz 24V AC / 12 to 30V DC (auto-selection) 85 to 265V AC 45 to 65Hz (tropicalized) 24V AC / 12 to 30V DC (auto-selection) (tropicalized) Reserved 0 Manual English French Italian German Spanish * Conductivity must be selected for PV1 when a combined conductivity ** For availability of these options refer to Data Sheet SS_AX4CO. and ph/redox (ORP) version is required Licensing, Trademarks and Copyrights Modbus is a trademark of Modicon, Inc. 11

12 ABB has Sales & Customer Support expertise in over 100 countries worldwide The Company s policy is one of continuous product improvement and the right is reserved to modify the information contained herein without notice. Printed in UK (02.03) ABB 2003 SS/AX4PH Issue 2 ABB Limited Oldends Lane, Stonehouse Gloucestershire, GL10 3TA UK Tel: +44 (0) Fax: +44 (0) ABB Inc Lockheed Way Carson City, NV USA Tel: Fax: