E-m-pf4-v1_00, 3 device calibration and adjustment procedure – ROTRONIC PF4 User Manual

Page 44

E-M-PF4-V1_00

Rotronic AG

Bassersdorf, Switzerland

Document Code

Unit

PF4 Differential Pressure Transmitter:

Instruction Manual

Document Type

Page 44 of 54

Document Title

E-M-PF4-V1_00

7.3 Device Calibration and Adjustment Procedure

Both the differential pressure sensor and the corresponding electronics are very stable and require no

maintenance. They do not normally need to be changed or recalibrated after factory calibration. For maximum

accuracy, however, we recommend regular calibration of the device and adjustment when necessary.

Important:

When carrying out calibration or adjustment work on the open device, make sure you do not touch either the

sensor or the compressed air tubes.

7.3.1

Adjust Differential Pressure

The differential pressure can be adjusted at two points.

 Zero


Any reference point in the sensor measurement range

Zero Adjustment

1. Connect the pressure connections with a short tube

2. Select

in MENU > Differential Pressure

After successful zero adjustment, "OK" is shown in the display.

Reference Value Adjustment

1. Apply a defined differential pressure or determine the current differential pressure with a reference

instrument connected in parallel.

2. Enter the reference value determined in MENU > Differential Pressure > RefValue.

3. Select

in MENU > Differential Pressure.

After successful adjustment, "OK" is shown in the display.

Reset Adjustment

The following procedure is used to reset adjustment to the factory setting.

1. Select

in MENU > Differential Pressure

After successful resetting of the adjustment, "OK" is shown in the display.