 |
 |
|||||||||||||||||||||||||
  |
||||||||||||||||||||||||||
MODEL 54E PH/ORP ANALYSER |
||||||||||||||||||||||||||
|
Features and ApplicationsThe Model 54e pH/ORP Microprocessor Analyser, with the appropriate sensor, is designed to monitor and control pH or ORP in industrial and municipal processes using the most advanced technology available. The analyser is housed in a rugged NEMA 4X (IP65)weatherproof, corrosion resistant enclosure of epoxy-painted aluminium. It is suitable for panel, pipe or wall mounting. All functions are accessible through the front panel membrane keyboard which features tactile feedback. The large dot-matrix liquid crystal display continuously indicates the measured variable in large numerals, along with the temperature, output value and two programmable process parameters such as alarms or diagnostics variables. Three levels of security are available: 1) calibration, 2) output range and alarm setpoint adjustment, and 3) advanced configuration. A hinged front panel provides convenient wiring access. The two independent, galvanically isolated outputs provide 4-20 or 0-20 mA signals for the measured variable, temperature or PID control (PID control not available on 450/0154). Both output ranges are programmable within the measurement ranges of pH or ORP and temperature. A hold output mode allows manual control during routine sensor maintenance. During hold mode the outputs will be at a preset or last process value. The state-of-the-art, continuous diagnostic capability of the analyser eliminates troubleshooting guesswork by alerting the user to the following problems:
In the event of one of these conditions, the analyser will display a descriptive message of the problem, illuminate a red LED on the front panel and drive the outputs to pre-selectable fault mode values. A dedicated fault relay may be used to provide a visible or audible alarm to an operator. All operations and descriptive messages can be field elected for English, French, German, Italian, or Spanish. The automatic buffer recognition uses stored buffer values and their temperature curves for the most common buffer standards available worldwide. The analyser will recognize any two of the three selected buffer values for the two point calibration, and perform a self-stabilization check on the sensor in each buffer. Three output relays are a standard feature and each may be configured as an alarm or time proportioned control (TPC not available on 450/0154). Alarms have programmable high or low activation, independent setpoints, adjustable hysteresis (dead-band), and time delay. Control outputs use fully configurable PID algorithms with adjustable cycle timers. One relay may be configured as a timer relay for chemical cleaning, which may be activated at a specific time interval. Green LEDs on the front panel indicate the status of each of the three alarm relays. The Model 54e pH/ORP is compatible with either an external Pt1000 or a Pt100 RTD located in the sensor to compensate the pH reading for process temperature fluctuations. Manual temperature compensation is keyboard selectable. Processes with pH changes due to temperature can be compensated using a programmable temperature coefficient or isopotential point. Physical Specifications - GeneralEnclosureEpoxy-painted cast aluminium NEMA 4X (IP65) 144 X 144 X 132 mm, DIN size (5.7 X 5.7 X 5.2 in.) Front Panel Membrane keyboard with tactile feedback and user selectable security. Light grey, blue and white overlay Light grey enclosure, dark grey bezel Display Dot matrix LCD (7.0 x 3.5 cm), blue on grey-green. The display contrast is compensated for ambient temperature. Process Variable Character Height 16mm (0.6 in.) Power 115 Vac, ± 10%, 50/60 Hz ± 6%, 6.0 W 230 Vac, ± 10%, 50/60 Hz ± 6%, 6.0 W Current Outputs Output 1: pH or ORP Output 2: pH, ORP or temperature Either output can be process or control (process only on 450/0154). Each output is galvanically isolated, 0-20 mA or 4-20 mA into 600 ohms maximum load. EMI/RFI EN50081-2 EN50082-2 LVD EN61010-1 Ambient Temperature 0 to 50˚C (32 to 122˚F) NOTE: The analyser is operable from -20 to 60˚C with some degradation in performance. Relative Humidity 95%, non condensing Alarms Relay 1 - Process alarm, control* or timer** Relay 2 - Process alarm, control* or timer** Relay 3 - Process alarm, control* or timer** Relay 4 - Fault alarm Each relay has a dedicated LED on the front panel. *not available on 450/0154. **maximum 1 interval timer. Relay Contacts Relays 1-3: Epoxy sealed form A contacts, SPST, normally open Relay 4: Epoxy sealed form C, SPDT
Weight/Shipping Weight 1.1 kg/1.6 kg (2.5 lb/3.5 lb) Instrument Specifications @ 25˚CMeasurement Range0 to 14 pH Output Scale Expansion Zero suppression: up to 13 pH units Span: Any pH from 1 to 14 Accuracy ± 0.01 pH Repeatability ± 0.01 pH Stability ± 0.01 pH/month, non-cumulative Temperature Coefficient Input: ± 0.003 pH/˚C Output: ± 0.006 pH/˚C Temperature Compensation Pt100 or Pt1000 RTD, Automatic or Manual –15 to 120˚C (5 to 248˚F) Temperature Measurement –15 to 120˚C (5 to 248˚F) Pt100 or Pt1000 RTD
|
|||||||||||||||||||||||||
|
Page reviewed: 9th May 2008 | ||||||||||||||||||||||||||
| home | contact us | page by h | about us | ||||||||||||||||||||||||||
