MAMAC Systems Low Pressure Sensor PR-275-R3-MA

Verify that the unit is mounted in the correct position

Verify appropriate input signal and supply voltage

Verify appropriate configuration range

Adjust the pressure to obtain maximum output signal for appropriate range

Enter the maximum output signal

Is the maximum output signal within the expected range (20 mA or 5 or 10 VDC)?

Adjust the pressure to obtain minimum output signal

Enter the minimum output signal

Ensure hot wire is on the [+] terminal if using grounded AC

Use an isolation transformer if controller lacks built-in isolation

Avoid powering from transformers used for non-isolated full-wave rectifier power supplies

Connect all 24G power leads to the same power lead on all devices when using multiple units

Maintain correct phasing when powering more than one device from a single transducer

Wiring PR-274/275 Units with mA Output

Remove the terminal block from the circuit board

Locate the [+] and [-] terminal markings on the board

Calibration of PR-274/275 mA Units

Connect terminals to power source and DVM

Apply low pressure to the unit and adjust trimmer for low output

Apply high pressure to the unit and adjust span trimmer for high output

Repeat low and high pressure adjustments until desired calibration is achieved

Disconnect power supply before installation to prevent electrical shock and equipment damage.

Make all connections in accordance with the job wiring diagram and in accordance with national and local electrical codes. Use copper conductors only.

Use electrostatic discharge precautions (e.g., use of wrist straps) during installation and wiring to prevent equipment damage.

Avoid locations where severe shock or vibration, excessive moisture or corrosive fumes are present.

Ensure NEMA Type 4 housings are used for outdoor installations to provide protection against wind-blown dust, rain, and hose-directed water.

Do not exceed ratings of the device.

Ensure condensate or moisture does not enter pressure sensor ports.