M702 Auswerteeinheit

Powerful microprocessor-based system (keyboard configurable) allowing selection of range, type of alarms, set point and it can receive 3 analogical input signals (2 of them can be used for cross sensitivity compensation or special functions).

On request, a system to perform zero and/or full scale autocalibration can be  provided.

The instrument has been designed to re-transmit the 4-20 mA signal proportional to the set range. 

Optional RS232C output can directly drive a printer with selectable timing and baud rate. Isolated current output is standard.

Mounting

The unit can be housed in a compact Noryl DIN case for panel mounting (standard), in a IP 65 case with clear front door for wall mounting or in explosion proof housing for mounting in classified area.

Single or dual alarm

A single alarm (high or low) or dual alarms (1 high and 1 low, 2 high or 2 low) can be provided as option. Each alarm consists of: 1) a keyboard configurable alarm threshold; 2) a LED, which is lit when an alarm is detected; 3) a relay contact that can be used to actuate an external signal or to start a shutdown process device.

Auxiliary Functions

Other options with diagnostic and calibration fault contacts are available (contact Adev technical office).

Display

It provides a continuous readout indication of the requested variable in engineering units (e.g. %), of alarms set point and alarms condition.

Control unit main elements

- 4 digits display for variable visualization.

- 3 digits auxiliary display for channel visualization.

- Led for alarms status indication.

- Led for instrument programming status indication.

- Two increase—decrease push buttons.

- One F key for display selection.

- One A key to enter into programming.