Microprocessor Based Conductivity Transmitter

The C 3436 conductivity / TDS transmitter is the best solution for the installations where it is necessary the retransmission of the measures at distance. Thanks to a “current loop” 4-20 mA isolated output and RS485 serial interface, the transmitter can be easily connected to the most common PLC or other remote supervision and control systems. The calibration of the sensor and the configuration of the transmitter can be done locally or remotely via the serial interface.

Main features

Range
0 ÷ 2.000/20.00/200.0/2000 μS
0 ÷ 2.000/20.00/200.0/2000 mS
0 ÷ 1.000/10.00/100.0/1000 ppm
0 ÷ 1.000/10.00/100.0/1000 ppt
-10.0 ÷ 110.0 °C , 14.0 ÷ 230.0 °F

Display
It shows the values of the measures and the messages that guide the user in the various stages of set-up and configuration.
Keyboard
I tasti includono quelli dedicati alla taratura di zero e disensibilità.
Temperature compensation
The transmitter performs the manual or automatic temperature compensation.
Calibration
Standard solutions are stored in the transmitter’s memory and they are automatically recognized during calibration.
Filter software
The user can set two filters in order to obtain a stable reading and a faster response to the variations of the measurement in the process.
Analog output
The 4-20 mA current loop is galvanically isolated, so that can be interfaced directly to a PLC or data acquisition cards.

Serial interface
The isolated RS485 serial interface allows connection to a PLC, terminals or PC, using the B&C (ASCII) or Modbus RTU protocol. The B&C (ASCII) protocol allows the transmission of measures and the management of calibration and configuration. The Modbus RTU protocol features the 03, 06, 16 functions. The digital and analog mode can be used simultaneously.
Logic input
The free voltage contacts can create the hold condition.
Power supply
The transmitter is 9 ÷ 36 Vdc current loop powered, directly from a PLC, from data acquisition boards or by a power supply in series between the analog output and the acquisition apparatus.
Easy installation
The small size of the transmitter and the removable terminal blocks facilitate the installation in control cabinets or waterproof enclosures for DIN Rail components.
Sensors
The transmitter is compatible with all 2 and 4 electrodes conductivity probes offered by B&C Electronics. Temperature is measured by means of Pt100 3 wires probes.

Applications

• Primary water • Food industry • Paper and pulp • Chemical industry • Pharmaceutical • Electroplating • Printing industry
• Textile industry • Irrigation and agricolture • Swimming pools • Safety • Water treatment • Surface treatment

Detailed Specifications

Power Supply: 9–36 Vdc
Outputs: 4–20 mA (isolated), RS-485 + Modbus RTU
Sensor Input: 2- or 4-electrode cells; Pt100 RTD
Conductivity Range: Scalable: up to 2000 mS depending on cell constant
TDS Range: Up to 1000 ppm or 1000 ppt
Temp. Compensation: Manual or automatic; configurable coefficient/reference
Calibration: Two-point with recognition of standard solutions
Filters: Dual configurable filters for signal stability and responsiveness
Mounting Options: DIN-rail or weatherproof enclosure (C3436-W)
Dimensions: 71 × 95 × 58 mm
Interface: Front display & keypad for local setup; serial interface for remote use