FOXBORO 873EC Analyzer

FOXBORO 873EC Analyzer

General Description

The 873EC Analyzer measures the conductivity of aqueous solutions. Its measurement display may be read in either µS/cm, mS/cm, or percent (%). Solution temperature is also measured by the 873EC for automatic temperature compensation and may be displayed whenever the user wants.It provides an isolated output signal proportional to the measurement for transmission to an external receiver. The plastic panel-mounted analyzer transmits one output signal only, while the metal enclosure analyzers can transmit two output signals.

Instrument Features

Described below are some of the features of the 873EC Electrochemical Analyzer:

♦ Plastic or Metal NEMA 4X Enclosure 

♦ Dual Alarms 

♦ Dual Isolated Analog Outputs on Metal Enclosure 

♦ EEPROM Memory 

♦ Instrument Security Code 

♦ Hazardous Area Classification (Metal Units) 

♦ Front Panel Display 

♦ Front Panel Keypad 

♦ Application Flexibility 

♦ Storm Door Option

Enclosures

The plastic enclosure is intended for panel mounting in general purpose locations, and mounts in 1/4 DIN size panel cutout. It meets the enclosure ratings of NEMA 1, CSA Enclosure 1, and IEC Degree of Protection IP-45. The metal enclosure is intended for field locations and may be either panel, pipe, or surface mounted. The housing is extruded aluminum coated with a tough epoxy-based paint. The enclosure is watertight, dusttight, and corrosion-resistant, meeting the enclosure ratings of NEMA 4X, CSA Enclosure 4X, and IEC Degree of Protection IP-65. The unit fits in a 92 x 92 mm (3.6 x 3.6 in) panel cutout (1/4 DIN size). The field-mounted enclosure provides protection against radio frequency interference (RFI) and electromagnetic interference (EMI).

Application Flexibility

The 873 Analyzer offers application flexibility through its standard software package. The software, run on the internal microprocessor, allows the user to define and set operating parameters particular to his application. These parameters fall into four general categories: Measurement Range, Alarm Configuration, Diagnostics, and Output Characterization. These parameters are retained in the EEPROM nonvolatile memory. Following power interruptions, all operating parameters are maintained.

Alarms

♦ Two alarms configurable via keypad 

♦ Individual setpoints continuously adjustable 0 to full scale via keypad 

♦ Hysteresis selection for both alarms; 0 to 99% of full scale value, configurable via keypad. 

♦ Dual timers for both alarms, adjustable 0 to 99 minutes, configurable via keypad. Allows for on/off control with delay. Timers can be set to allow chemical feed, then delay for chemical concentration control.

Electromagnetic Compatibility (EMC)

Metal Case Analyzers

The metal case 220 V ac or 240 V ac analyzers comply with the requirements of the European EMC Directive 89/336/EEC when the sensor cable and power cable are enclosed in rigid metal conduit.

Plastic Case Analyzers

The plastic case analyzers are intended for mounting in metal consoles or cabinets. The plastic case analyzers comply with the European EMC Directive 89/336/EEC when mounted in a metal enclosure and the I/O cables extending outside the enclosure are enclosed in rigid metal conduit.